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WO2022228162A1 - 一种通信方法、装置及系统 - Google Patents

一种通信方法、装置及系统 Download PDF

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Publication number
WO2022228162A1
WO2022228162A1 PCT/CN2022/087250 CN2022087250W WO2022228162A1 WO 2022228162 A1 WO2022228162 A1 WO 2022228162A1 CN 2022087250 W CN2022087250 W CN 2022087250W WO 2022228162 A1 WO2022228162 A1 WO 2022228162A1
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WO
WIPO (PCT)
Prior art keywords
iab
host
information
node
request message
Prior art date
Application number
PCT/CN2022/087250
Other languages
English (en)
French (fr)
Inventor
朱元萍
史玉龙
罗海燕
刘菁
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP22794633.2A priority Critical patent/EP4322617A4/en
Publication of WO2022228162A1 publication Critical patent/WO2022228162A1/zh
Priority to US18/496,606 priority patent/US20240064607A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H04W88/085—Access point devices with remote components
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
    • H04W40/246—Connectivity information discovery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/02—Topology update or discovery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/20—Hop count for routing purposes, e.g. TTL
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/74—Address processing for routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
    • H04W40/248—Connectivity information update
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/34—Modification of an existing route
    • H04W40/36—Modification of an existing route due to handover
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H04W74/0841—Random access procedures, e.g. with 4-step access with collision treatment
    • H04W74/085—Random access procedures, e.g. with 4-step access with collision treatment collision avoidance

Definitions

  • Embodiments of the present invention relate to the field of communication technologies, and in particular, to a communication method, device, and system.
  • the fifth-generation mobile communication has put forward more stringent requirements for network performance indicators, such as: capacity indicators increased by 1000 times, wider coverage requirements, ultra-high reliability and ultra-low latency, etc.
  • network performance indicators such as: capacity indicators increased by 1000 times, wider coverage requirements, ultra-high reliability and ultra-low latency, etc.
  • capacity indicators increased by 1000 times such as: capacity indicators increased by 1000 times, wider coverage requirements, ultra-high reliability and ultra-low latency, etc.
  • capacity indicators increased by 1000 times, wider coverage requirements, ultra-high reliability and ultra-low latency, etc.
  • IAB integrated access and backhaul
  • UE user equipment
  • IAB donor donor node
  • the signaling overhead in the IAB network is relatively large, resulting in a waste of transmission resources.
  • Embodiments of the present invention disclose a communication method, device and system, which are used to save transmission resources.
  • a first aspect discloses a communication method, which can be applied to a radio access network (radio access network, RAN) management network element, and can also be applied to a module (eg, a chip) in the RAN management network element.
  • the RAN management network element may be connected to a first IAB host through a first interface, and the first IAB host is connected to the first IAB node through a wireless backhaul link.
  • the following description takes the application to the RAN management network element as an example.
  • the communication method may include: determining configuration information of the first IAB host and/or the first IAB node, the configuration information including one or more of address information, routing information and cell information; The first IAB host sends the configuration information.
  • the RAN management network element can manage address configuration, route configuration, and cell configuration. Since the RAN management network element can manage the address configuration, routing configuration and cell configuration of multiple IAB hosts and IAB nodes within the jurisdiction of these multiple IAB hosts at the same time, it can ensure that two or more IAB host networks can Within the scope, the configuration information of different IAB nodes will not conflict when they communicate with each other. In this way, in the case of cross-host network service transmission requirements, conflicts between multiple IAB host networks can be avoided. The signaling overhead of interaction and coordination among multiple IAB hosts is avoided, the signaling overhead is reduced, and transmission resources can be saved. In addition, since the RAN management network element is located on the RAN side, the time required for information transmission between the RAN management network element and the IAB host is relatively short, so the information transmission delay can be reduced, thereby improving the timeliness of obtaining configuration information.
  • the method further includes: receiving a request message from the first IAB host; the sending the configuration information to the first IAB host includes: responding to the request message, sending a request to the first IAB host.
  • the first IAB host sends the configuration information.
  • the RAN management network element may send configuration information to the IAB host only after receiving a request message from the IAB host for requesting configuration information, which can avoid the IAB host and/or be within the jurisdiction of the IAB host.
  • the RAN management network element sends the configuration information to the IAB host, which can reduce the transmission of unnecessary information, thereby saving transmission resources.
  • the address information includes a backhaul adaptation protocol (backhaul adaptation protocol, BAP) layer identifier and/or an internet protocol (internet protocol, IP) address.
  • BAP backhaul adaptation protocol
  • IP internet protocol
  • the routing information includes an adaptation layer routing identifier and/or a routing mapping table
  • the routing mapping table includes the adaptation layer routing identifier and an identifier of a next-hop node.
  • the cell information includes an identity of the cell and resource configuration of the cell.
  • the resource configuration of the cell includes one or more of frequency point information of the cell, bandwidth information of the cell, and uplink and downlink duplex modes of the cell.
  • the request message includes the number of addresses required by the first IAB node and/or the first IAB host, and the number of addresses required by the first IAB node and/or the first IAB host 's identification.
  • the RAN management network element can determine the address information of the IAB node and/or the IAB host according to the number of addresses required by the IAB node and/or the IAB host included in the request message, and can ensure the address information sent to the IAB host.
  • the number of addresses included is just enough for the IAB node and/or the IAB host to use, neither will the IAB node and/or the IAB host be insufficient due to the small number, nor will the transmission resources be wasted due to the large number.
  • the request message includes topology information
  • the topology information includes the connection relationship between the first IAB host and/or the first IAB node and other nodes.
  • the RAN management network element can determine the routing information of the IAB node and/or the IAB host according to the topology information included in the request message, which can ensure the accuracy of the routing information sent to the IAB host, thereby ensuring the correctness of the data. transmission.
  • the request message includes an identifier of a cell serving the first IAB host and/or the first IAB node.
  • the RAN management network element can re-determine cell information for these cells according to the cell identifiers included in the request message, which can avoid determining unnecessary cell information, thereby saving transmission resources.
  • the re-determined cell information may include the resource configuration of the cell.
  • the re-determined cell information may further include an identity of the cell, so that the IAB host and/or the IAB node can determine which resource configuration belongs to which cell according to the identity of the cell.
  • the re-determined cell information may further include the identity of the cell and the identity of the re-determined cell, so that the IAB host and/or the IAB node can determine which cell according to the identity of the cell and the identity of the re-determined cell Update from old name to new name.
  • the request message is a first interface establishment request message or an IAB configuration update request message.
  • a second aspect discloses a communication method, which can be applied to a first IAB host, and can also be applied to a module (eg, a chip) in the first IAB host.
  • the first IAB host is connected to the RAN management network element through a first interface, and the first IAB host is connected with the first IAB node through a wireless backhaul link.
  • the following description takes the application to the first IAB host as an example.
  • the communication method may include: receiving configuration information of the first IAB host and/or the first IAB node from the RAN management network element through the first interface, where the configuration information includes address information, routing information One or more of information and cell information; obtain one or more of the address information, the routing information and the cell information.
  • the IAB host may receive configuration information of the IAB host and/or the IAB node from the RAN management network element that manages the IAB host, and then may transmit data according to the configuration information of the IAB host and/or the IAB node.
  • the IAB host can obtain the address configuration, routing configuration and cell configuration of the IAB nodes within the jurisdiction of the IAB host from the RAN management network element, and does not need to interact and coordinate with other IAB hosts.
  • signaling overhead for interaction and coordination among multiple IAB hosts can be avoided, signaling overhead is reduced, and transmission resources can be saved.
  • the RAN management network element is on the RAN side, the time required for information transmission between the IAB host and the RAN management network element is relatively short. Therefore, the information transmission delay can be reduced, thereby improving the timeliness of obtaining configuration information.
  • the communication method may further include: sending a request message to the RAN management network element, where the request message is used to request the configuration information.
  • the IAB host can send a request message for requesting configuration information to the RAN management network element, so that the RAN management network element can respond to the request message and send configuration information to the IAB host, which can avoid the IAB host and/or
  • the RAN management network element sends the configuration information to the IAB host, which can reduce the transmission of unnecessary information, thereby saving transmission resources.
  • the communication method may further include: sending the configuration information of the first IAB node to the first IAB node.
  • the IAB host after receiving the configuration information of the IAB node from the RAN management network element, the IAB host can send the configuration information of the IAB node to the IAB node, so that the IAB node can correctly transmit data according to the configuration information of the IAB node.
  • the address information includes a BAP layer identifier and/or an IP address.
  • the routing information includes an adaptation layer routing identifier and/or a routing mapping table
  • the routing mapping table includes the adaptation layer routing identifier and an identifier of a next-hop node.
  • the cell information includes an identity of the cell and resource configuration of the cell.
  • the resource configuration of the cell includes one or more of frequency point information of the cell, bandwidth information of the cell, and uplink and downlink duplex modes of the cell.
  • the request message includes the number of addresses required by the first IAB node and/or the first IAB host, and the number of addresses required by the first IAB node and/or the first IAB host 's identification.
  • the IAB host may send the number of addresses required by the IAB node and/or the IAB host to the RAN management network element, so that the RAN management network element can determine the IAB according to the number of addresses required by the IAB node and/or the IAB host.
  • the address information of the node and/or the IAB host can ensure that the address information sent to the IAB host includes just enough addresses for the IAB node and/or the IAB host to use, and neither the IAB node and/or the IAB host will be insufficient due to the small number. It will not waste transmission resources because of too many.
  • the request message includes topology information
  • the topology information includes the connection relationship between the first IAB host and/or the first IAB node and other nodes.
  • the IAB host can send topology information to the RAN management network element, so that the RAN management network element can determine the routing information of the IAB node and/or the IAB host according to the topology information, which can ensure the routing information sent to the IAB host. accuracy, which in turn ensures the correct transmission of data.
  • the request message includes an identifier of a cell serving the first IAB host and/or the first IAB node.
  • the IAB host can send the identity of the cell whose cell information needs to be updated to the RAN management network element, so that the RAN management network element can re-determine the cell information for these cells according to the identity of the cell, and can avoid determining unnecessary cells information, thereby saving transmission resources.
  • the re-determined cell information may include the resource configuration of the cell. In one case, the re-determined cell information may further include an identity of the cell, so that the IAB host and/or the IAB node can determine which resource configuration belongs to which cell according to the identity of the cell.
  • the re-determined cell information may further include the identity of the cell and the identity of the re-determined cell, so that the IAB host and/or the IAB node can determine which cell according to the identity of the cell and the identity of the re-determined cell Update from old name to new name.
  • the request message is a first interface establishment request message or an IAB configuration update request message.
  • a third aspect discloses a communication method.
  • the communication method can be applied to a RAN management network element, and can also be applied to a module (eg, a chip) in the RAN management network element.
  • the RAN management network element is connected to the first IAB host through a first interface
  • the RAN management network element is connected to the first IAB node through a second interface
  • the first IAB host and the first IAB node are connected through a wireless backhaul link road connection.
  • the following description takes the application to the RAN management network element as an example.
  • the communication method may include: determining configuration information of the first IAB node, the configuration information including one or more of address information, routing information and cell information;
  • the IAB node sends the configuration information.
  • the RAN management network element can manage address configuration, route configuration, and cell configuration. Since the RAN management network element can manage the address configuration, routing configuration and cell configuration of the IAB nodes within the jurisdiction of multiple IAB hosts at the same time, it can make different IAB nodes within the scope of two or more IAB host networks.
  • the configuration information of the IABs will not conflict when they communicate with each other, so that in the case of cross-host network service transmission requirements, conflicts between multiple IAB host networks can be avoided, and then there are cross-host network business transmissions. In the case of demand, signaling overhead of interaction and coordination among multiple IAB hosts can be avoided, signaling overhead is reduced, and transmission resources can be saved.
  • the configuration information of the IAB node can be directly sent to the IAB node by the RAN management network element without going through the IAB host, which can further reduce the signaling overhead, so that it can be Further saving transmission resources.
  • the RAN management network element is located on the RAN side, the time required for information transmission between the RAN and the IAB node is relatively short, so the information transmission delay can be reduced, thereby improving the timeliness of obtaining configuration information.
  • the communication method may further include: sending the configuration information to the first IAB host through the first interface.
  • the RAN management network element needs to send the configuration information of the IAB node to the IAB host, so that the IAB host can manage the IAB node according to the configuration information of the IAB node.
  • the communication method may further include: determining configuration information of the first IAB host; sending the configuration information of the first IAB host to the first IAB host through the first interface .
  • the RAN management network element can manage the address configuration, routing configuration and cell configuration of multiple IAB hosts at the same time, it can ensure that the configuration information of different IAB hosts is different, and can avoid the communication between multiple IAB host networks. Therefore, the signaling overhead of interaction and coordination among multiple IAB hosts can be avoided, the signaling overhead can be reduced, and transmission resources can be saved.
  • the address information includes a BAP layer identifier and/or an IP address.
  • the routing information includes an adaptation layer routing identifier and/or a routing mapping table
  • the routing mapping table includes the adaptation layer routing identifier and an identifier of a next-hop node.
  • the cell information includes an identity of the cell and resource configuration of the cell.
  • the resource configuration of the cell includes one or more of frequency point information of the cell, bandwidth information of the cell, and uplink and downlink duplex modes of the cell.
  • the communication method may further include: receiving a first request message from the first IAB host; sending the first request message to the first IAB host through the first interface
  • the configuration information of the IAB host includes: in response to the first request message, sending the configuration information of the first IAB host to the first IAB host through the first interface.
  • the RAN management network element may send the configuration information of the IAB host to the IAB host only after receiving the request message from the IAB host for requesting the configuration information of the IAB host, which can prevent the IAB host from not needing the configuration information
  • the RAN management network element sends the configuration information of the IAB host to the IAB host, the transmission of unnecessary information can be reduced, thereby saving transmission resources.
  • the first request message includes the number of addresses required by the first IAB host and the identifier of the first IAB host.
  • the RAN management network element can determine the address information of the IAB host according to the number of addresses required by the IAB host included in the request message, and can ensure that the number of addresses included in the address information sent to the IAB host is just enough for the IAB host to use , it will not make the IAB host insufficient because of less, and will not cause waste of transmission resources because of too many.
  • the first request message includes first topology information
  • the first topology information includes a connection relationship between the first IAB host and the IAB node.
  • the RAN management network element can determine the routing information of the IAB host according to the topology information included in the request message, which can ensure the accuracy of the routing information sent to the IAB host, and thus can ensure the correct transmission of data.
  • the first request message includes an identifier of a cell serving the first IAB host.
  • the RAN management network element can re-determine cell information for these cells according to the cell identifiers included in the request message, which can avoid determining unnecessary cell information, thereby saving transmission resources.
  • the re-determined cell information may include the resource configuration of the cell.
  • the re-determined cell information may further include an identity of the cell, so that the IAB host can determine which resource configuration belongs to which cell according to the identity of the cell.
  • the re-determined cell information may also include the identity of the cell and the identity of the re-determined cell, so that the IAB host can determine which cell is updated from the old name to the identity of the re-determined cell according to the identity of the cell and the identity of the re-determined cell. new name.
  • the first request message is a first interface establishment request message or an IAB configuration update request message.
  • the communication method may further include: receiving a second request message from the first IAB node; and sending the configuration information to the first IAB node through the second interface
  • the method includes: in response to the second request message, sending the configuration information to the first IAB node through the second interface.
  • the RAN management network element may send the configuration information of the IAB node to the IAB node only after receiving the request message from the IAB node for requesting the configuration information of the IAB node, which can prevent the IAB node from not needing the configuration information
  • the RAN management network element sends configuration information to the IAB node, which can reduce the transmission of unnecessary information, thereby saving transmission resources.
  • the second request message includes the number of addresses required by the first IAB node and the identifier of the first IAB node.
  • the RAN management network element can determine the address information of the IAB node according to the number of addresses required by the IAB node included in the request message, and can ensure that the number of addresses included in the address information sent to the IAB node is just enough for the IAB node to use , it will not make the IAB nodes insufficient because of too few, and will not cause waste of transmission resources because of too many.
  • the second request message includes second topology information
  • the second topology information includes the relationship between the first IAB node and a parent node and/or child node of the first IAB node connection relationship.
  • the RAN management network element can determine the routing information of the IAB node according to the topology information included in the request message, which can ensure the accuracy of the routing information sent to the IAB node, thereby ensuring the correct transmission of data.
  • the second request message includes an identifier of a cell serving the first IAB node.
  • the RAN management network element can re-determine cell information for these cells according to the cell identifiers included in the request message, which can avoid determining unnecessary cell information, thereby saving transmission resources.
  • the re-determined cell information may include the resource configuration of the cell.
  • the re-determined cell information may further include an identity of the cell, so that the IAB node can determine which resource configuration belongs to which cell according to the identity of the cell.
  • the re-determined cell information may further include the identity of the cell and the identity of the re-determined cell, so that the IAB node can determine which cell is updated from the old name to that of the re-determined cell according to the identity of the cell and the identity of the re-determined cell new name.
  • the second request message is a second interface establishment request message or an IAB configuration update request message.
  • a fourth aspect discloses a communication method, which can be applied to the first IAB node, and can also be applied to a module (eg, a chip) in the first IAB node.
  • the first IAB node is connected to the first IAB host through a wireless backhaul link, and the first IAB node is connected to the RAN management network element through a second interface.
  • the following description will be given by taking the application to the first IAB node as an example.
  • the communication method may include: receiving configuration information of the first IAB node from the RAN management network element through the second interface, the configuration information including one of address information, routing information and cell information or multiple; obtain one or more of the address information, the routing information and the cell information.
  • the IAB node may receive configuration information from the IAB node that manages the RAN management network element hosting the IAB, and then may transmit data according to the configuration information of the IAB node. It can be seen that the IAB node can obtain the address configuration, routing configuration and cell configuration of the IAB node from the RAN management network element.
  • the IAB node When the IAB node has cross-home network service transmission requirements, it can avoid managing the IAB node's IAB host and other IAB hosts. Therefore, the signaling overhead of interaction and coordination among multiple IAB hosts can be avoided, the signaling overhead can be reduced, and transmission resources can be saved.
  • the RAN management network element is on the RAN side, the time required for information transmission between the IAB node and the RAN management network element is relatively short, so the information transmission delay can be reduced, thereby improving the timeliness of obtaining configuration information.
  • the address information includes a BAP layer identifier and/or an IP address.
  • the routing information includes an adaptation layer routing identifier and/or a routing mapping table
  • the routing mapping table includes the adaptation layer routing identifier and an identifier of a next-hop node.
  • the cell information includes an identity of the cell and resource configuration of the cell.
  • the resource configuration of the cell includes one or more of frequency point information of the cell, bandwidth information of the cell, and uplink and downlink duplex modes of the cell.
  • the communication method may further include: sending a second request message to the RAN management network element through the second interface, where the second request message is used to request the configuration information.
  • the IAB node can send a request message for requesting configuration information to the RAN management network element, so that the RAN management network element can respond to the request message and send configuration information to the IAB node, which can avoid the IAB node from needing to configure
  • the RAN management network element sends configuration information to the IAB node, which can reduce the transmission of unnecessary information, thereby saving transmission resources.
  • the second request message includes the number of addresses required by the first IAB node and the identifier of the first IAB node.
  • the IAB node can send the number of addresses required by the IAB node to the RAN management network element, so that the RAN management network element can determine the address information of the IAB node according to the number of addresses required by the IAB node, and can ensure that the address information is sent to the IAB
  • the number of addresses included in the address information of the node is just enough to be used by the IAB node, so that the IAB node will not be insufficient due to the small number, and the transmission resources will not be wasted due to the large number.
  • the second request message includes second topology information
  • the second topology information includes the relationship between the first IAB node and a parent node and/or child node of the first IAB node connection relationship.
  • the IAB node can send topology information to the RAN management network element, so that the RAN management network element can determine the routing information of the IAB node according to the topology information, which can ensure the accuracy of the routing information sent to the IAB node, and further can Ensure the correct transmission of data.
  • the second request message includes an identifier of a cell serving the first IAB node.
  • the IAB node may send the identification of the cell whose cell information needs to be updated to the RAN management network element, so that the RAN management network element can re-determine the cell information for these cells according to the identification of the cell, which can avoid determining unnecessary cells information, thereby saving transmission resources.
  • the re-determined cell information may include the resource configuration of the cell. In one case, the re-determined cell information may further include an identity of the cell, so that the IAB node can determine which resource configuration belongs to which cell according to the identity of the cell.
  • the re-determined cell information may further include the identity of the cell and the identity of the re-determined cell, so that the IAB node can determine which cell is updated from the old name to that of the re-determined cell according to the identity of the cell and the identity of the re-determined cell new name.
  • the second request message is a second interface establishment request message or an IAB configuration update request message.
  • a fifth aspect discloses a communication device.
  • the communication device RAN manages a network element, and the RAN management network element can be connected to a first IAB host through a first interface, and the first IAB host is connected to the first IAB node through a wireless backhaul link.
  • the communication apparatus may include: a determining unit configured to determine configuration information of the first IAB host and/or the first IAB node, the configuration information including one or more of address information, routing information and cell information.
  • a sending unit configured to send the configuration information to the first IAB host.
  • the communication apparatus may further include: a receiving unit, configured to receive a request message from the first IAB host; the sending unit, specifically configured to respond to the request message, send a request message to the request message.
  • the first IAB host sends the configuration information.
  • the address information includes a BAP layer identifier and/or an IP address.
  • the routing information includes an adaptation layer routing identifier and/or a routing mapping table
  • the routing mapping table includes the adaptation layer routing identifier and an identifier of a next-hop node.
  • the cell information includes an identity of the cell and resource configuration of the cell.
  • the resource configuration of the cell includes one or more of frequency point information of the cell, bandwidth information of the cell, and uplink and downlink duplex modes of the cell.
  • the request message includes the number of addresses required by the first IAB node and/or the first IAB host, and the number of addresses required by the first IAB node and/or the first IAB host 's identification.
  • the request message includes topology information
  • the topology information includes the connection relationship between the first IAB host and/or the first IAB node and other nodes.
  • the request message includes an identifier of a cell serving the first IAB host and/or the first IAB node.
  • the request message is a first interface establishment request message or an IAB configuration update request message.
  • a sixth aspect discloses a communication device.
  • the communication device is a first IAB host, the first IAB host is connected to the RAN management network element through a first interface, and the first IAB host is connected with the first IAB node through a wireless backhaul link.
  • the communication apparatus may include: a receiving unit configured to receive configuration information of the first IAB host and/or the first IAB node from the RAN management network element through the first interface, the configuration information It includes one or more of address information, routing information and cell information; an acquiring unit is configured to acquire one or more of the address information, the routing information and the cell information.
  • the communication apparatus may further include: a first sending unit, configured to send a request message to the RAN management network element, where the request message is used to request the configuration information.
  • the communication apparatus may further include: a second sending unit, configured to send the configuration information of the first IAB node to the first IAB node.
  • the address information includes a BAP layer identifier and/or an IP address.
  • the routing information includes an adaptation layer routing identifier and/or a routing mapping table
  • the routing mapping table includes the adaptation layer routing identifier and an identifier of a next-hop node.
  • the cell information includes an identity of the cell and resource configuration of the cell.
  • the resource configuration of the cell includes one or more of frequency point information of the cell, bandwidth information of the cell, and uplink and downlink duplex modes of the cell.
  • the request message includes the number of addresses required by the first IAB node and/or the first IAB host, and the number of addresses required by the first IAB node and/or the first IAB host 's identification.
  • the request message includes topology information
  • the topology information includes the connection relationship between the first IAB host and/or the first IAB node and other nodes.
  • the request message includes an identifier of a cell serving the first IAB host and/or the first IAB node.
  • the request message is a first interface establishment request message or an IAB configuration update request message.
  • a seventh aspect discloses a communication device.
  • the communication device is a RAN management network element, the RAN management network element is connected to the first IAB host through a first interface, the RAN management network element is connected to the first IAB node through a second interface, and the first IAB host is connected to the first IAB node.
  • the first IAB node is connected via a wireless backhaul link.
  • the communication device may include: a determining unit for determining configuration information of the first IAB node, the configuration information including one or more of address information, routing information and cell information; a sending unit for The second interface sends the configuration information to the first IAB node.
  • the sending unit is further configured to send the configuration information to the first IAB host through the first interface.
  • the determining unit is further configured to determine the configuration information of the first IAB host; the sending unit is further configured to send the information to the first IAB host through the first interface. Describe the configuration information of the first IAB host.
  • the address information includes a BAP layer identifier and/or an IP address.
  • the routing information includes an adaptation layer routing identifier and/or a routing mapping table
  • the routing mapping table includes the adaptation layer routing identifier and an identifier of a next-hop node.
  • the cell information includes an identity of the cell and resource configuration of the cell.
  • the resource configuration of the cell includes one or more of frequency point information of the cell, bandwidth information of the cell, and uplink and downlink duplex modes of the cell.
  • the communication apparatus may further include: a first receiving unit, configured to receive a first request message from the first IAB host; the sending unit sends a message to the The sending of the configuration information of the first IAB host by the first IAB host includes: in response to the first request message, sending the configuration information of the first IAB host to the first IAB host through the first interface.
  • the first request message includes the number of addresses required by the first IAB host and the identifier of the first IAB host.
  • the first request message includes first topology information
  • the first topology information includes a connection relationship between the first IAB host and the IAB node.
  • the first request message includes an identifier of a cell serving the first IAB host.
  • the first request message is a first interface establishment request message or an IAB configuration update request message.
  • the communication apparatus may further include: a second receiving unit, configured to receive a second request message from the first IAB node; the sending unit sends a message to the The sending of the configuration information by the first IAB node includes: in response to the second request message, sending the configuration information to the first IAB node through the second interface.
  • the second request message includes the number of addresses required by the first IAB node and the identifier of the first IAB node.
  • the second request message includes second topology information
  • the second topology information includes the relationship between the first IAB node and a parent node and/or child node of the first IAB node connection relationship.
  • the second request message includes an identifier of a cell serving the first IAB node.
  • the second request message is a second interface establishment request message or an IAB configuration update request message.
  • An eighth aspect discloses a communication device.
  • the communication device is a first IAB node, the first IAB node is connected to the first IAB host through a wireless backhaul link, and the first IAB node is connected to a RAN management network element through a second interface.
  • the communication apparatus may include: a receiving unit configured to receive configuration information of the first IAB node from the RAN management network element through the second interface, the configuration information including address information, routing information and cell information One or more of; an acquisition unit, configured to acquire one or more of the address information, the routing information and the cell information.
  • the address information includes a BAP layer identifier and/or an IP address.
  • the routing information includes an adaptation layer routing identifier and/or a routing mapping table
  • the routing mapping table includes the adaptation layer routing identifier and an identifier of a next-hop node.
  • the cell information includes an identity of the cell and resource configuration of the cell.
  • the resource configuration of the cell includes one or more of frequency point information of the cell, bandwidth information of the cell, and uplink and downlink duplex modes of the cell.
  • the communication apparatus may further include: a sending unit, configured to send a second request message to the RAN management network element through the second interface, where the second request message is used to request all configuration information.
  • the second request message includes the number of addresses required by the first IAB node and the identifier of the first IAB node.
  • the second request message includes second topology information
  • the second topology information includes the relationship between the first IAB node and a parent node and/or child node of the first IAB node connection relationship.
  • the second request message includes an identifier of a cell serving the first IAB node.
  • the second request message is a second interface establishment request message or an IAB configuration update request message.
  • a ninth aspect discloses a communication device.
  • the communication device may include a processor, a memory, an input interface for receiving information from other communication devices other than the communication device, and an output interface for sending information outside the communication device.
  • the other communication device outputs information, and when the processor executes the computer program stored in the memory, the processor causes the processor to execute the communication method disclosed in the first aspect or any embodiment of the first aspect.
  • a tenth aspect discloses a communication device.
  • the communication device may include a processor, a memory, an input interface for receiving information from other communication devices other than the communication device, and an output interface for sending information outside the communication device.
  • the other communication device outputs information, and when the processor executes the computer program stored in the memory, the processor causes the processor to execute the communication method disclosed in the second aspect or any embodiment of the second aspect.
  • the communication device may include a processor, a memory, an input interface for receiving information from other communication devices other than the communication device, and an output interface for sending information outside the communication device
  • the other communication device outputs information, and when the processor executes the computer program stored in the memory, the processor causes the processor to execute the communication method disclosed in the third aspect or any embodiment of the third aspect.
  • a twelfth aspect discloses a communication device.
  • the communication device may include a processor, a memory, an input interface for receiving information from other communication devices other than the communication device, and an output interface for sending information outside the communication device.
  • the other communication device outputs information, and when the processor executes the computer program stored in the memory, the processor causes the processor to execute the communication method disclosed in the fourth aspect or any embodiment of the fourth aspect.
  • a thirteenth aspect discloses a communication system, the communication system includes the communication device of the ninth aspect and the communication device of the tenth aspect, or the communication system includes the communication device of the eleventh aspect and the communication device of the twelfth aspect.
  • a fourteenth aspect discloses a computer-readable storage medium, where a computer program or computer instruction is stored thereon, and when the computer program or computer instruction is executed, the communication method disclosed in the above aspects is implemented.
  • a fifteenth aspect discloses a chip including a processor for executing a program stored in a memory, and when the program is executed, causes the chip to execute the above method.
  • the memory is located off-chip.
  • a sixteenth aspect discloses a computer program product comprising computer program code which, when executed, causes the above communication method to be performed.
  • FIG. 1 is a schematic diagram of an IAB independent networking disclosed in an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of an IAB non-independent networking disclosed in an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a user plane protocol disclosed in an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a control plane protocol disclosed in an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a connection between an IAB node and an OAM disclosed in an embodiment of the present invention
  • FIG. 6 is a schematic diagram of an application scenario of an IAB network disclosed in an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a network architecture disclosed in an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of another network architecture disclosed in an embodiment of the present invention.
  • FIG. 9 is a schematic flowchart of a communication method disclosed in an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of a control plane protocol stack of a first interface between a RAN management network element and a first IAB host disclosed in an embodiment of the present invention
  • FIG. 11 is a schematic diagram of an IAB host obtaining address information disclosed in an embodiment of the present invention.
  • FIG. 12 is a schematic diagram of an IAB host obtaining routing information disclosed in an embodiment of the present invention.
  • FIG. 13 is a schematic diagram of an IAB host acquiring cell information disclosed in an embodiment of the present invention.
  • 16 is a schematic flowchart of another communication method disclosed by an embodiment of the present invention.
  • 17 is a schematic flowchart of another communication method disclosed by an embodiment of the present invention.
  • FIG. 18 is a schematic structural diagram of a communication device disclosed in an embodiment of the present invention.
  • 19 is a schematic structural diagram of another communication device disclosed in an embodiment of the present invention.
  • FIG. 20 is a schematic structural diagram of another communication device disclosed in an embodiment of the present invention.
  • FIG. 21 is a schematic structural diagram of another communication device disclosed in an embodiment of the present invention.
  • Embodiments of the present invention disclose a communication method, device and system for saving transmission resources. Each of them will be described in detail below.
  • the fifth generation mobile communication (5G) system puts forward more stringent requirements for various performance indicators of the network. For example, the capacity index is increased by 1000 times, wider coverage, ultra-high reliability and ultra-low latency are required.
  • the capacity index is increased by 1000 times, wider coverage, ultra-high reliability and ultra-low latency are required.
  • the use of high-frequency small cell networking is becoming more and more popular. Due to the poor propagation characteristics of high-frequency carriers, severe occlusion and attenuation, and limited coverage, a large number of small cells need to be densely deployed. Correspondingly, it is costly and difficult to construct optical fiber backhaul for these densely deployed small cells.
  • FIG. 1 is a schematic diagram of an independent IAB networking according to an embodiment of the present invention.
  • an IAB network may include a user equipment (user equipment, UE), an IAB node (node), and an IAB donor (donor).
  • the IAB node may also be called a relay node (relay node, RN), which can provide a wireless access service for the UE.
  • the IAB node may include a mobile terminal (mobile termination, MT) part and a distributed unit (distributed unit, DU) part.
  • MT mobile termination
  • DU distributed unit
  • the IAB node When the IAB node faces its parent node, the IAB node can act as a terminal device, that is, the role of the MT; when the IAB node faces its child nodes, it is regarded as a network device, that is, the role of the DU.
  • the MT part of the IAB node has some or all of the functions of the UE.
  • a child node of an IAB node may be another IAB node, and may also be a UE.
  • the IAB host may also be referred to as a donor node (donor node) or a donor base station (donor gNodeB, DgNB).
  • the donor base station may be an access network device with a complete base station function, or may be an access network device in the form of a centralized unit (centralized unit, CU) and DU separated.
  • the CU of the IAB host may be referred to as IAB host CU or CU for short
  • the DU of the IAB host may be referred to as IAB host DU for short.
  • the IAB host CU may also be a form in which the control plane (CP) and the user plane (UP) are separated.
  • CP control plane
  • UP user plane
  • a CU may include one CU-CP and one or more CU-UPs.
  • the service data of the UE can be sent to the IAB host by the IAB node through the wireless backhaul link.
  • the IAB host can connect to the core network elements serving the UE and provide wireless backhaul functions for the IAB nodes.
  • the IAB node can be made to support dual connectivity (DC) or multi-connectivity (multi-connectivity) to deal with possible abnormal situations in the backhaul link, such as link interruption or Blockage and load fluctuations, etc., so that the reliability of transmission can be improved. Therefore, the IAB network can support multi-hop networking and multi-connection networking. Between the UE served by the IAB node and the IAB host, there is at least one transmission path consisting of multi-segment links. A transmission path can contain multiple nodes.
  • a transmission path may include a UE, one or more IAB nodes, and an IAB host.
  • one transmission path may also include the IAB host DU part and the IAB host CU part.
  • Each IAB node regards the adjacent nodes that provide access and backhaul services as a parent node, and accordingly, each IAB node can be regarded as a child node of its parent node.
  • the parent node of IAB node 1 is the IAB host
  • IAB node 1 is the parent node of IAB node 2 and IAB node 3
  • IAB node 2 and IAB node 3 are the parent nodes of IAB node 4
  • IAB node 5 is the parent node.
  • the parent node is IAB node 2.
  • the uplink data packets of the UE may be transmitted to the IAB host through one or more IAB nodes, and then sent by the IAB host to the mobile gateway device.
  • the user plane function (UPF) network element in the 5G core network For example, the user plane function (UPF) network element in the 5G core network.
  • the downlink data packets of the UE will be received by the IAB host from the mobile gateway device, and then sent to the UE through the IAB node.
  • Figure 1 shows an IAB independent (standalone, SA) networking scenario, where both the IAB node and the UE only establish connections with the network through the air interface of the new radio (new radio, NR) standard.
  • SA standalone
  • the IAB independent networking scenario shown in FIG. 1 is only exemplary, and there are more other possibilities in the IAB scenario combining multi-hop and multi-connection.
  • the IAB host in Figure 1 and an IAB node under another IAB host form dual connectivity to serve the UE, that is, the UE supports dual connectivity, one of which is connected directly to the cell served by the IAB host DU, and the other is connected to the IAB.
  • the node X establishes a connection, and the IAB host to which the IAB node X is connected is different from the IAB host corresponding to the UE connection 1 . I will not list them one by one here.
  • FIG. 2 is a schematic diagram of an IAB non-independent networking according to an embodiment of the present invention.
  • the IAB node supports dual connectivity of 4G and 5G networks, namely the evolved universal mobile telecommunications system (E-UTRAN) NR dual connectivity (E-UTRAN NR dual connectivity, EN-DC).
  • the long term evolution (LTE) base station is the master base station (master eNB, MeNB), which provides LTE air interface (ie LTE Uu interface) connection for UE, and connects with 4G core network (ie evolved packet core network (evolved packet core network).
  • LTE long term evolution
  • the IAB host is the secondary base station, which provides the NR air interface (ie, the NR Uu interface) connection for the IAB node, and performs user plane transmission with the core network through the S1-U interface.
  • the UE also supports EN-DC, the UE can connect to the MeNB through the LTE Uu interface, and can connect to the secondary base station through the NR Uu interface.
  • the IAB non-independent networking shown in Figure 2 is only a networking example, and the NSA scenario of the IAB network also supports multi-hop IAB networking.
  • the UE in FIG. 2 may be another IAB node, that is, the IAB node may be connected to the IAB donor base station through a multi-hop wireless backhaul link.
  • the IAB non-independent networking scenario in the present invention may also be referred to as the EN-DC networking scenario of the IAB.
  • the BAP layer is located above the radio link control (RLC) layer and can be used to implement functions such as data packet routing on the wireless backhaul link and bearer mapping.
  • RLC radio link control
  • the F1 interface may also be called the F1* interface, which may be collectively called the F1 interface in the present invention, but the name is not limited.
  • the F1 interface supports the user plane protocol (F1-U) and the control plane protocol (F1-C). Please refer to FIG. 3, which is a schematic diagram of a user plane protocol disclosed in an embodiment of the present invention.
  • the user plane protocol of the F1 interface may include general packet radio service (general packet radio service, GPRS) tunneling protocol user plane (GPRS tunnelling protocol user plane, GTP-U), user datagram protocol (user datagram protocol , UDP), one or more of the protocol layers such as IP.
  • the IAB node and the IAB host DU may include BAP, RLC layer protocols, media access control (media access control, MAC) layer protocols and physical (physical, PHY) layer protocols.
  • the IAB host DU and the IAB host CU-UP may also include L2 layer protocols and L1 layer protocols. Please refer to FIG. 4.
  • FIG. 4 is a schematic diagram of a control plane protocol disclosed in an embodiment of the present invention. As shown in FIG.
  • the control plane protocol of the F1 interface may include one or more of protocol layers such as F1 application protocol (F1 application protocol, F1AP), stream control transport protocol (stream control transport protocol, SCTP), and IP. Others can refer to the description of FIG. 3 .
  • Communication between the IAB nodes and between the IAB nodes and the IAB host DU may be performed through a backhaul (BH) RLC channel (channel).
  • Communication between the IAB host DU and the IAB host CU-UP/CP can be performed through intra-donor F1.
  • the IAB node and the IAB host CU-UP can communicate through the F1-U interface.
  • the IAB node and the IAB host CU-UP can communicate through the F1-C interface.
  • the L1 layer and the L2 layer generally refer to the protocol layers of wired communication.
  • the L1 layer may include a physical layer
  • the L2 layer may include a data link layer
  • the L2 layer may further include: a MAC layer, a logical link control layer (LLC), a point to point protocol layer (point to point protocol) , PPP), one or more of the link layer of the Ethernet (Ethernet) technology.
  • LLC logical link control layer
  • PPP point to point protocol layer
  • Ethernet Ethernet
  • the interface management between the IAB node and the IAB host, the management of the DU part of the IAB node, and the configuration related to the UE context can be performed through the control plane of the F1 interface. Functions such as user plane data transmission and downlink transmission status feedback can be performed between the IAB node and the IAB host through the user interface of the F1 interface.
  • FIG. 5 is a schematic diagram of a connection between an IAB node and an OAM according to an embodiment of the present invention. As shown in Figure 5, an IAB node can connect to an OAM server in two different ways.
  • Another way is to carry the OAM service of the DU part of the IAB node through the protocol data unit (PDU) session established by the MT part of the IAB node. This way needs to pass through the MT part of the IAB node.
  • PDU protocol data unit
  • the IAB host CU may perform slot/symbol granularity uplink and downlink configuration for cells in the time division duplexing (TDD) mode of the IAB-DU, and perform available attribute configuration, etc.
  • the uplink and downlink configuration may include a downlink (downlink) configuration, an uplink (uplink) configuration, and a flexible (flexible) configuration.
  • the available attribute configuration can be hard, soft, or not available.
  • FIG. 6 is a schematic diagram of an application scenario of an IAB network disclosed in an embodiment of the present invention.
  • the IAB network considers two scenarios.
  • One scenario is that an IAB node located at the edge of the IAB host's coverage can connect to multiple parent nodes within the jurisdiction of different IAB hosts at the same time, establish a backhaul link, and use the backhaul of these multiple different IAB host control ranges.
  • the network provides access and backhaul services for UEs or other IAB nodes.
  • a movable IAB node may switch between different IAB hosts considering the mobility of the IAB node.
  • the IAB-DU cell configuration may include identification allocation of a cell (cell) of the DU, resource configuration of the cell of the DU, satisfying duplex constraints, and the like.
  • the topology management function in the IAB network is performed by the IAB host (specifically, the IAB host CU or the IAB host CU-CP), and only topology management within the IAB host can be performed.
  • the IAB host assigns a BAP routing ID within its own jurisdiction, which can ensure that a transmission path to a destination node is uniquely identified within the host scope.
  • the IAB nodes are in the coverage of different IAB hosts, if the two IAB host CU-CPs configure the same BAP routing ID for the IAB nodes under their respective jurisdiction, but this BAP routing ID actually identifies the difference between the different target nodes.
  • this BAP routing ID has a common node on two different paths identified in the networks under the jurisdiction of the two IAB hosts, then when the data packet carrying the BAP routing ID is transmitted to this or these common nodes, The routing of data packets will not be able to be performed normally, and errors may occur. Therefore, in the above two scenarios, in order to enable the IAB node to work normally, a possible way is to require coordination and interaction between different IAB host CU-CPs, so that the signaling overhead is large, resulting in the loss of transmission resources. waste. In addition, since the delay of coordination and interaction cannot be ignored, the delay of data transmission is relatively large.
  • the configuration of some cells (such as cell global identity (CGI)) will change during the handover process of the IAB node performing the cross-IAB host.
  • CGI cell global identity
  • FIG. 7 is a schematic diagram of a network architecture disclosed in an embodiment of the present invention.
  • the network architecture may include one or more UEs (one is shown in the figure), one or more IAB nodes (two are shown in the figure), multiple IAB hosts, and access network equipment ,
  • the radio access network (RAN) manages network elements and core network equipment.
  • the UE and the IAB node can communicate through the NR Uu port.
  • the access network device is an access network device in LTE
  • the UE and the access network device and between the IAB node and the access network device can communicate through LTE Uu.
  • the UE and the access network device and between the IAB node and the access network device can communicate through NR Uu. Communication between the IAB nodes and between the IAB node and the IAB host can be carried out through the NR BH.
  • the core network equipment may include 5G core network (5G core, 5GC) and EPC. Communication between the IAB host and the 5GC and between the access network equipment and the 5GC can be performed through NG. Communication between the IAB host and the EPC and between the access network device and the EPC can be performed through S1.
  • the access network device is an access network device in LTE
  • the IAB host and the access network device can communicate through X2-C.
  • the IAB host and the access network device can communicate with each other through X2-C. Access network devices can communicate through Xn-C.
  • the IAB node When the IAB node works in SA mode, the IAB node can be connected to a single parent node or double connected to two parent nodes.
  • the two parent nodes can be controlled by the same IAB host or by different IAB hosts. It is sufficient to establish an F1 interface between the DU part of the IAB node and an IAB host, and the IAB host can be connected to the 5GC.
  • the IAB host CU-CP can connect to the control plane network elements in the 5GC through the NG control plane interface, such as the access and mobility management function AMF (AMF) network elements.
  • the IAB host CU-UP can connect to user plane network elements in 5GC, such as UPF network elements, through the NG user plane interface.
  • the IAB host CU-UP can connect to the EPC (such as a serving gateway (SGW)) through the S1 user plane interface.
  • EPC serving gateway
  • FIG. 8 is a schematic diagram of another network architecture disclosed in an embodiment of the present invention.
  • the network architecture may include multiple IAB nodes (two are illustrated in the figure), multiple donor base stations (ie, IAB donors) and RAN management network elements.
  • the RAN management network element can communicate with the donor base station through the Ex interface.
  • the terminal device also known as terminal equipment, mobile station (mobile station, MS), mobile terminal (mobile terminal, MT), etc., is a device that provides voice and/or data connectivity to users.
  • the terminal device can be a handheld terminal, a notebook computer, a subscriber unit, a cellular phone, a smart phone, a wireless data card, a personal digital assistant (PDA) computer, a tablet computer , wireless modem (modem), handheld device (handheld), laptop computer (laptop computer), cordless phone (cordless phone) or wireless local loop (wireless local loop, WLL) station, machine type communication (machine type communication, MTC) terminals, wearable devices (such as smart watches, smart bracelets, pedometers, etc.), in-vehicle devices (such as cars, bicycles, electric vehicles, airplanes, ships, trains, high-speed rail, etc.), virtual reality (virtual reality, VR ) equipment, augmented reality (AR) equipment, wireless terminals in industrial control (industrial control), smart home equipment (such as refrigerators, TV
  • the IAB node is used to provide access services and backhaul services for child nodes or UEs.
  • the IAB host is the access network device that supports the IAB node.
  • 5GC is used to perform authentication, mobility management, PDU session management, etc. on the UE, including functional entities or network elements such as AMF network elements and UPF network elements.
  • EPC is used for UE authentication, mobility management, packet data network (PDN) connection management, etc., including mobility management entity (mobility management entity, MME), packet data gateway (PDN gateway, PGW) and other networks Yuan.
  • mobility management entity mobility management entity, MME
  • PGW packet data gateway
  • the RAN management network element is a newly introduced network element, which can perform topology management and cell management for the IAB nodes hosted by one or more IABs.
  • the RAN management network element may establish a communication interface with the one or more IAB hosts.
  • the communication interface may be an Ex interface or other names, and the name of the communication interface is not limited in the present invention, and the present invention takes the first interface as an example for description.
  • the RAN management network element may also have other names, the name of which is not limited in the present invention, and the present invention takes the RAN management network element as an example for description.
  • the RAN management network element may be an independent network element or entity, or may be a logical network element. Logical network elements can be set up in an IAB host.
  • FIG. 7 and FIG. 8 is not limited to including only the network elements and devices shown in the figures, but may also include other network elements or devices not shown in the figures. Not to list them one by one.
  • the access IAB node is the IAB node directly connected to the terminal device, that is, the IAB node accessed by the terminal device.
  • An intermediate IAB node is an IAB node that provides wireless backhaul services for other IAB nodes, that is, an IAB node located between the access IAB node and the IAB host in a path.
  • IAB node 4 is an access IAB node, and IAB node 1 and IAB node 3 are intermediate IAB nodes.
  • an IAB node for the terminal equipment that accesses the cell served by the IAB node, it is the role of the access IAB node; when it is for the child/grandchild IAB node of the IAB node. Or for the terminal equipment accessing the cell served by the child/grandchild IAB node, it is the role of the intermediate IAB node.
  • a child node of the first IAB node is a node directly connected to the first IAB node and downstream of the first IAB node, that is, a node directly accessing a cell served by the first IAB node.
  • the grandchild node of the first IAB node is a node that is indirectly connected to the first IAB node and is downstream of the first IAB node, for example, a node that is connected to a cell served by a child node of the first IAB node, or wirelessly connected through at least two hops.
  • the backhaul link is connected to a node downstream of the first IAB node to which the first IAB node is connected.
  • Both the child node and the grandchild node may be considered as subordinate nodes of the first IAB node.
  • the child node of the first IAB node and the grandchild node of the first IAB node may be an IAB node or a terminal device.
  • the parent node of the first IAB node is a node directly connected to the first IAB node and upstream of the first IAB node, that is, a node that directly provides access services to the first IAB node, and the first IAB node is connected to its parent node in the served area.
  • the parent node of the first IAB node may be an IAB node or an IAB host. For example, the parent node of IAB node 2 in FIG.
  • IAB node 1 is IAB node 1
  • the child nodes of IAB node 2 are IAB node 4 and IAB node 5
  • the grandchild nodes of IAB node 2 are UE1 and UE2 .
  • the parent node of IAB node 1 in FIG. 1 is the IAB host
  • the child nodes of IAB node 1 are IAB node 2 and IAB node 3
  • the grandchild nodes of IAB node 1 are IAB node 4, IAB node 5, UE1 and UE2.
  • a node downstream of the IAB node is a node that establishes a connection with the IAB host through the IAB node.
  • the upstream nodes of the IAB node may include nodes on the link between the IAB node and the IAB host, and may also include the IAB host, which is closer to the IAB host.
  • Next-hop node of the first IAB host/first IAB node refers to the first IAB host/first IAB node in the path that receives data after the first IAB host/first IAB node package node.
  • the next hop node of the first IAB host/first IAB node may also be referred to as the next hop node of the data packet.
  • FIG. 9 is a schematic flowchart of a communication method disclosed in an embodiment of the present invention. As shown in FIG. 9 , the communication method may include the following steps.
  • the RAN management network element can connect to multiple IAB hosts through the first interface. It can be understood that the RAN management network element can manage one or more IAB hosts through the first interface. Multiple IAB hosts.
  • the first IAB host can be connected to one or more terminal devices through one or more IAB nodes. It can be understood that the first IAB host can be connected to one or more terminal devices through one or more managed IAB nodes. It can also be understood that Being the first IAB host can connect with one or more terminal devices through one or more IAB nodes within the jurisdiction of the first IAB host.
  • the first IAB host is any one of the multiple IAB hosts connected to the RAN management network element, which can be understood as any one of the multiple IAB hosts managed by the RAN management network element, and can also be understood as the RAN management network. Any of a number of IAB hosts within the scope of the meta.
  • the first IAB host and the first IAB node can be connected through a wireless backhaul link, and can be connected through a one-hop wireless backhaul link, that is, the first IAB host and the first IAB node are directly connected, that is, the first IAB host and the first IAB host are directly connected.
  • the first IAB node is an IAB node connected to the first IAB host, and other IAB nodes connected to the first IAB host are similar to the first IAB node.
  • the first IAB node is used as an example for description below. It should be understood that the first IAB node is an IAB node within the jurisdiction of the first IAB host, that is, an IAB node managed by the first IAB host.
  • the connection between the first IAB host and the first IAB node can be understood as the direct connection between the first IAB host and the first IAB node, that is, there is no other IAB node between the first IAB host and the first IAB node; it can also be understood as the first IAB node
  • the host is indirectly connected to the first IAB node, that is, there are other IAB nodes between the first IAB host and the first IAB node.
  • the IAB host in FIG. 1 is directly connected to IAB node 1
  • the IAB host in FIG. 1 is indirectly connected to IAB node 2 and IAB node 3.
  • FIG. 10 is a schematic diagram of a control plane protocol stack of a first interface between a RAN management network element and a first IAB host according to an embodiment of the present invention.
  • the control plane protocol stack of the first interface between the RAN management network element and the first IAB host may include a radio network layer and a transport network layer.
  • the wireless network layer may include a first interface application protocol (application protocol, AP) layer.
  • the transport network layer may include a PHY layer, a data link layer, an IP layer, and an SCTP layer.
  • the first interface AP layer is a newly introduced protocol layer, and is mainly used for first interface management, various configurations and updates of the IAB network, and maintenance of context information of each node in the IAB network.
  • the RAN management network element determines the configuration information of the first IAB host and/or the first IAB node.
  • the RAN management network element may determine the configuration information of the first IAB host and/or the first IAB node, which may be understood as determining the configuration information of the first IAB host, It can also be understood as determining the configuration information of the first IAB node, and can also be understood as determining the configuration information of the first IAB host and the first IAB node.
  • the configuration information of the first IAB host may include one or more of address information, routing information and cell information of the first IAB host.
  • the configuration information of the first IAB node may include one or more of address information, routing information and cell information of the first IAB node.
  • the first IAB host and/or the first IAB node When a request message for requesting configuration information of the first IAB host and/or the first IAB node is received from the first IAB host, or the topology information of the first IAB host and/or the first IAB node is obtained, or the Upon the updated topology information of the first IAB host and/or the first IAB node, it may be determined that the first IAB host and/or the first IAB node need configuration information.
  • the address information may include a BAP layer identification and/or an IP address.
  • the address information of the first IAB host includes the BAP layer identifier and does not include the IP address.
  • the address information of the first IAB node may include a BAP layer identifier and/or an IP address, which may be understood as including a BAP layer identifier, may also be understood as including an IP address, or may be understood as including both a BAP layer identifier and an IP address.
  • the BAP layer identifier may be a BAP address (address), or may be other information that can uniquely identify the BAP layer of the first IAB host or the first IAB node.
  • the IP address is configured for the IAB node, and can be an IPv4 address, an IPv6 address, an IPv6 address prefix, or other IP addresses, which are not limited here.
  • the configuration information of the first IAB host may be understood as the configuration information of the DU of the first IAB host.
  • the routing information may include an adaptation layer routing ID (ie, a BAP routing ID) and/or a routing mapping table.
  • the routing information of the first IAB host and/or the first IAB node may include an adaptation layer routing identifier and/or a routing mapping table.
  • the routing information of the first IAB node may include a routing mapping table, and may not include an adaptation layer routing identifier.
  • the routing information of the first IAB node may include an adaptation layer routing identifier, and in addition, the routing information of the first IAB node may further include a routing mapping table.
  • the routing information of the first IAB node may be determined as the route of the first IAB node mapping table.
  • the default route only contains a default BAP routing ID.
  • the default BAP routing ID can point to a default transmission path.
  • the next hop node of the first IAB node in the default transmission path can be: in the parent node of the first IAB node
  • the routing information of the first IAB host may include an adaptation layer routing identifier.
  • the routing information of the first IAB host may also include a routing mapping table.
  • the adaptation layer routing identifier is used to identify the transmission path to a destination node.
  • the adaptation layer routing identifier may include the BAP layer identifier (eg, BAP address) of the destination node and the BAP layer path identifier (ie, BAPpathID).
  • BAP layer identifier eg, BAP address
  • BAP pathID BAP layer path identifier
  • the destination node here may be the destination node of the data packet on the wireless backhaul link, may be an IAB node, may be an IAB host, or may be a terminal device. When the CU and DU of the first IAB host are separated, the destination node may also host the DU for the IAB.
  • the RAN management network element may configure different path identifiers for two different downlink transmission paths between the IAB host and the IAB node 4 respectively.
  • the RAN management network element can configure the BAP path ID1 for the path: IAB host ⁇ IAB node 1 ⁇ IAB node 3 ⁇ IAB node 4, and can configure the BAP path for the path: IAB host ⁇ IAB node 1 ⁇ IAB node 2 ⁇ IAB node 4 ID2.
  • the RAN management network element can combine the BAP layer identifiers of the destination node IAB node 4 corresponding to the two transmission paths, and can obtain the adaptation layer routing identifiers pointing to the two transmission paths as BAP routingID1 and BAP routingID 2 respectively.
  • Each BAP routingID includes the BAP layer identification of the destination node of the transmission, and the BAP layer path identification BAP pathID to the destination node.
  • the routing mapping table may include an adaptation layer routing ID (BAP routing ID) and the identification of the next hop node.
  • the route mapping table of the first IAB host may include an adaptation layer routing identifier of the first IAB host and an identifier of the next hop node.
  • the next hop node of the first IAB host may be an IAB node.
  • the route mapping table of the first IAB node may include an adaptation layer routing identifier of the first IAB node and an identifier of the next hop node.
  • the next hop node of the first IAB node may be an IAB node, an IAB host (or an IAB host DU), or a terminal device.
  • the identifier of the next-hop node may be the BAP layer identifier of the IAB node, the IP address of the IAB node, or other information that can uniquely identify the IAB node.
  • the identifier of the next-hop node may be the identifier of the terminal device, or may be other information that can uniquely identify the terminal device.
  • the identifier of the next hop node can be the BAP layer identifier of the IAB host, or can be other information that can uniquely identify the IAB host (for example, the IP layer identifier of the IAB host).
  • the identifier of the next hop node may be the BAP layer identifier of the IAB host DU, or may be other information that can uniquely identify the IAB host DU, such as the IP layer identifier of the IAB host.
  • the signaling structure of the routing mapping table determined by the RAN management network element may be: > IAB node/IAB donor DU identifier (first IAB node/first IAB host DU identifier, used to indicate that the following BAP routing ID list content is Which node needs the routing map)
  • BAP routing ID list (adaptation layer routing ID list, can contain one or more items, each of which contains a BAProuting ID, and a next hop node (Next hop Node))
  • the routing mapping table may contain routing mapping tables required by multiple different IAB nodes and/or IAB host DUs. It contains the required route mapping table of the first IAB node and/or the first IAB host DU.
  • step 901 when the route mapping table determined by the RAN management network element is only the route mapping table of the first IAB node or the first IAB host DU, the content of the first row in the above signaling structure corresponding to the route mapping table may be It is optional (optional), that is, it does not contain the IAB node/IAB donor DU identification part.
  • the cell information may include the identity of the cell and the resource configuration of the cell.
  • the cell information of the first IAB host may include the identity of the cell serving the first IAB host and the resource configuration of the cell.
  • the cell information of the first IAB node may include an identity of a cell serving the first IAB node and a resource configuration of the cell.
  • the identifier of the cell may be a physical cell identifier (PCI), an NR cell identifier (NCI), or other information that can uniquely identify a cell.
  • PCI physical cell identifier
  • NCI NR cell identifier
  • the resource configuration of the cell may include one or more of the following: frequency information of the cell, bandwidth information of the cell, uplink and downlink duplex mode of the cell, transmission resource configuration of the cell, synchronization signal and broadcast block (synchronization signal and PBCH of the cell) block, SSB) transmission configuration (SSB transmission configuration, STC) configuration, cell common random access resource configuration, cell common IAB dedicated random access resource configuration, cell channel status information reference signal (channel status information reference signal, CSI-RS) configuration, cell scheduling request (scheduling request, SR) configuration, system information block (system information block, SIB) 1 configured in the transmission physical downlink control channel (physical downlink control channel, PDCCH) location and common Subcarrier spacing configuration.
  • the uplink and downlink duplex mode may be a TDD mode or a frequency division duplexing (frequency division duplexing, FDD) mode.
  • the transmission resource configuration of the cell can include the attribute configuration of the downlink symbol (symbol)/uplink (uplink) symbol/flexible (flexible) symbol in each time slot (slot).
  • the attribute can be hard (hard) or can be Soft (soft), can also be unavailable (not available).
  • the transmission resource configuration of the cell may further include the positions and numbers of downlink symbols, uplink symbols and flexible symbols in each time slot.
  • the RAN management network element can perform address management on the IAB hosts and IAB nodes within the jurisdiction of the RAN management network element. It can be understood that the RAN management network element can determine the BAP layer identifier and/or the IAB host for the IAB nodes and/or IAB hosts within its jurisdiction. / or IP address. It can be seen that the RAN management network element can manage the addresses of the first IAB host and/or the first IAB node, that is, the RAN management network element can determine the BAP layer identifier and/or IP address for the first IAB host and/or the first IAB node address. Which IAB nodes and/or which IAB hosts are specifically allocated within the jurisdiction may be determined according to the needs of the IAB nodes and/or the IAB hosts, or may be determined according to the request of the IAB host.
  • the RAN management network element may determine a BAP layer identification list.
  • This list of BAP layer identities can be as shown in any of Table 1-Table 4:
  • BAP layer identification BAP layer identification 1 BAP layer identification 2 ... BAP layer identifier N
  • BAP layer identification IAB host/IAB node identification
  • BAP layer identification 1 IAB host 1
  • BAP layer identification 2 IAB host 1
  • BAP layer identification 3 IAB Node 1
  • BAP layer identification 4 IAB Node 1 ... ...
  • BAP layer identifier N IAB node M
  • BAP layer identification IAB host ID 1 BAP layer ID 1, BAP layer ID 2 IAB Node 1 BAP layer identification 3, BAP layer identification 4
  • the RAN management network element can determine the BAP layer identity used by the first IAB host and the IAB nodes managed by the first IAB host, but can not determine which BAP layer identity is hosted by which IAB node or the first IAB node use. It may be up to the first IAB host to decide which BAP layer identity is used by which IAB node or the first IAB host. As shown in Table 2, the RAN management network element may determine a BAP layer identifier for each IAB node among the first IAB host and the IAB nodes managed by the first IAB host. As shown in Table 3 or Table 4, the RAN management network element may determine one BAP layer identifier for the first IAB host or an IAB node managed by the first IAB host, or may determine multiple BAP layer identifiers.
  • the RAN management network element can determine the BAP layer identifier used by the first IAB host DU and the IAB node managed by the first IAB host CU, but can not determine which BAP The layer identification is used by which IAB node or which DU of the first IAB host. Which BAP layer identity is used by which IAB node or which DU of the first IAB host may be determined by the CU or CU-CP of the first IAB host. As shown in Table 2, the RAN management network element may determine a BAP layer identifier for each IAB node among the DU of the first IAB host and the IAB nodes managed by the first IAB host. As shown in Table 3 or Table 4, the RAN management network element may determine one BAP layer identifier or multiple BAP layer identifiers for the first IAB host DU or the IAB node managed by the first IAB host.
  • Tables 1 to 4 are only exemplary descriptions of the BAP layer identification list, and do not constitute a limitation on the BAP layer identification list.
  • the list of BAP layer identities may only include BAP layer identities used by all or some of the IAB nodes managed by the first IAB host.
  • the RAN management network element may determine a list of IP addresses.
  • This IP address list may include the IP address of the first IAB node, ie may include the IP address assigned to the first IAB node.
  • each IP address may specifically be an IPv4 address, an IPv6 address, or an IPv6 address prefix.
  • This list of IP addresses can be as shown in any of Tables 5-8:
  • IAB node identification IP address IAB Node 1 IP address 1 IAB Node 2 IP address 2 ... ... IAB Node N IP addressN
  • IAB node identification IP address IAB Node 1 IP address 1, IP address 2 IAB Node 2 IP address 3, IP address 4 ... ... IAB node M IP addressN
  • the RAN management network element may determine the IP address used by the IAB node managed by the first IAB host, but may not determine which IP address is used by which IAB node. It may be up to the first IAB host to decide which IP address is used by which IAB node. As shown in Table 6, the RAN management network element may respectively determine an IP address for the IAB nodes among the IAB nodes managed by the first IAB host. As shown in Table 7 or Table 8, the RAN management network element may determine one IP address or multiple IP addresses for the IAB node managed by the first IAB host.
  • IP address list may only include IP addresses used by all IAB nodes or some of the IAP nodes managed for the first IAB host.
  • the IP address list may also include the purpose of the IP address.
  • the IP address list may also include the purpose of each IP address, and the purpose may be the user plane (F1-U) service of the F1 interface, the control plane (F1-C) service of the F1 interface, or the Used for non-F1 interface (non-F1) services. If the usage of the IP address is not included, it can be considered that the IP address can be used for all types of services.
  • M is an integer greater than or equal to 1
  • N is an integer greater than or equal to M
  • the RAN management network element may provide address information for the first IAB host based on the request message of the first IAB host.
  • FIG. 11 is a schematic diagram of an IAB host acquiring address information according to an embodiment of the present invention.
  • the first IAB host may send a first request message for requesting address information to the RAN management network element through the first interface.
  • the first request message may request a BAP layer identification and/or an IP address.
  • the RAN management network element may send a first response message to the first IAB host through the first interface in response to the first request message.
  • the first reply message carries the determined address information of the first IAB host and/or the first IAB node.
  • the address information of the first IAB host and/or the first IAB node may be determined by the RAN management network element before receiving the first request message, or may be determined by the RAN management network element after receiving the first request message.
  • the RAN management network element may first determine the first IAB host and/or the first IAB host in response to the first request message address information of an IAB node, and then send a first response message to the first IAB host through the first interface.
  • the first request message may carry one or more of the following information: the number of required BAP layer identifiers, the identifier of the IAB node of the required BAP layer identifier, the identifier of the first IAB host, the type of the required IP address, The number of required IP addresses, the purpose of the required IP addresses, the identification of the IAB node for the required IP addresses.
  • the identity of the first IAB host in the first request message may be replaced with the identity of the first IAB host DU of the required BAP layer identity.
  • the first request message may only carry the required number of BAP layer identifiers, may not carry the number of BAP layer identifiers required by each IAB node, or may not carry the information of the first IAB host (or the first IAB host DU) The number of BAP layer identifiers required.
  • the first request message may only carry the required number of IP addresses, and may not carry the required number of IP addresses of each IAB node.
  • the RAN management network element may send all BAP layer identities and/or all IP addresses to the first IAB host, and the first IAB host allocates all BAP layer identities and/or all IP addresses.
  • the type of the required IP address may be one or more of an IPv4 address, an IPv6 address, and an IPv6 address prefix.
  • the first request message may further include the required quantity of each type of IP address (that is, the number of required IP addresses), or each corresponding to the usage of the different IP addresses.
  • the desired number of types of IP addresses may carry the number of IPv4 addresses/IPv6 addresses/IPv6 address prefixes requested for F1-C/F1-U/non-F1 service transmission.
  • the first request message When the first request message carries one or more of the type of the required IP address, the number of required IP addresses, and the purpose of the required IP address, it can also carry the identifier of the IAB node that specifically needs the IP address (that is, the required IP address). ID of the IAB node that requires an IP address). For example, the first request message may carry the identifier of the first IAB node and the number of IPv4 addresses/IPv6 addresses/IPv6 address prefixes required by the first IAB node for F1-C/F1-U/non-F1 service transmission . When the first request message does not carry the purpose of the required IP address, it can be considered that the requested IP address can be applicable to all service types.
  • the first request message may also include one or more of the number of addresses required by the first IAB host, the number of addresses required by the first IAB node, the identity of the first IAB host, and the identity of the first IAB node.
  • the address required by the first IAB host may be understood as the BAP layer identifier required by the first IAB host.
  • the address required by the first IAB host may be understood as an identifier of the BAP layer required by the first IAB host DU.
  • the address required by the first IAB node may be understood as a BAP layer identifier and/or an IP address required by the first IAB node.
  • the first request message may carry the number of BAP layer identifiers required by each IAB node requiring a BAP layer identifier.
  • the first request message may also carry the number of BAP layer identifiers required by the first IAB host.
  • the first request message may carry one or more identifiers of the first IAB host DU.
  • the first request message may also carry the number of BAP layer identifiers required by each first IAB host DU.
  • the first request message may also carry information such as the quantity, type, and purpose of IP addresses required by each IAB node that requires an IP address, and for details, refer to the description in the previous paragraph.
  • the RAN management network element can directly determine the allocated addresses for the first IAB node and the first IAB host, and does not need the first IAB host to allocate, which can reduce the processing process of the first IAB host, thereby saving the functions of the first IAB host. consumption.
  • the first request message may not carry or include the required number of BAP layer identifiers, or not include the first IAB host and/or the first IAB layer identifier.
  • the number of BAP layer identities required by an IAB node When the first IAB node only needs one IP address, that is, when all IAB nodes managed by the first IAB host need one IP address, the first request message may not carry the required number of IP addresses, or may not include the number of IP addresses required by the first IAB node. The number of IP addresses required.
  • the first request message may not carry the required number of BAP layer identifiers and the required IP address or may not include the number of BAP layer identifiers required by the first IAB host, and/or the BAP layer identifiers and/or IP addresses required by the first IAB node.
  • the RAN management network element may determine a BAP layer identity for the first IAB host.
  • a BAP layer identifier and/or an IP address may be determined for the first IAB node.
  • the first IAB host may send the first request message to the RAN management network element after an IAB node accesses the network.
  • the first request message may carry: the identifier of the IAB node, the number of BAP layer identifiers required by the IAB node, the type of the IP address required by the IAB node, the purpose of the IP address required by the IAB node and the corresponding Information such as the number of IP addresses used for each purpose.
  • the first request message may not carry the number of BAP layer identifiers required by the IAB node.
  • the first request message may not carry the number of IP addresses required by the IAB node.
  • the first request message may also carry the purpose of the IP address.
  • the first request message may not carry the required number of IP addresses or the number of IP addresses required by each IAB node, and the RAN management network element can default to each IP address.
  • An IAB node that requires an IP address is assigned an IP address.
  • the first request message may not carry the required number of BAP layer identifiers, or each IAB node and/or the first IAB The number of IP addresses required by the host, and the RAN management network element may assign a BAP layer identification to each IAB node and/or the first IAB host that needs a BAP layer identification by default.
  • the RAN management network element can perform routing management on the IAB host and IAB nodes within the jurisdiction of the RAN management network element.
  • the RAN management network element may determine routing information for IAB nodes and/or IAB hosts within its jurisdiction. It can be seen that the RAN management network element can manage the routes of the first IAB host and/or the first IAB node.
  • the RAN management network element may determine routing information for the first IAB host and/or the first IAB node.
  • the RAN management network element may notify the first IAB host of the node identification and sequence included in the transmission path corresponding to each adaptation layer routing ID (BA Routing ID).
  • BA Routing ID adaptation layer routing ID
  • the RAN management network elements all need to determine the adaptation layer routing identifier of the first IAB host and/or the first IAB node.
  • the RAN management network element may determine the route map for the first IAB host and/or the first IAB node based on the adaptation layer routing identifier.
  • the first IAB host may actively send (ie report) the topology information to the RAN management network element.
  • the first IAB host is a CU-DU separated architecture
  • the first IAB host CU or the first IAB host CP-UP may actively report the topology information to the RAN management network element.
  • the topology information may include the first IAB host (or the first IAB host DU) and/or the connection relationship between the first IAB node and other nodes.
  • the topology information may further include the identity of the first IAB host (or the first IAB host DU) and/or the identity of the first IAB node.
  • the first IAB host may send the updated topology information to the RAN management network element. For example, when a new IAB node is newly connected to the first IAB host, or an old IAB node leaves the scope of the first IAB host and disconnects from the first IAB host, or an IAB node establishes a dual connection, or an IAB node When a radio link failure (radio link failure, RLF) occurs on the wireless backhaul link, the node may consider that the network topology of the first IAB host and/or the first IAB node has changed.
  • Other nodes can be terminal devices, IAB nodes, or IAB hosts.
  • the other nodes may include nodes under the jurisdiction of the first IAB host, and may also include nodes under the jurisdiction of other IAB hosts. Nodes under the jurisdiction of other IAB hosts may include one or more of other IAB hosts (or other IAB host DUs), IAB nodes under the jurisdiction of other IAB hosts, terminal equipment connected to cells under the jurisdiction of other IAB hosts, etc. .
  • the connection relationship between the first IAB node and other nodes may include identifiers of one or more parent nodes connected to the first IAB node, and may also include identifiers of one or more child nodes connected to the first IAB node.
  • connection relationship between the first IAB node and other nodes may also include identifiers of one or more terminal devices connected to the first IAB node, and the first IAB node is connected to the IAB via one or more wireless backhaul links.
  • FIG. 12 is a schematic diagram of an IAB host acquiring routing information according to an embodiment of the present invention.
  • the first IAB host (or the first IAB host DU) and/or the first IAB node need routing information
  • the first IAB host (or the first IAB host CU, or the first IAB host CU- CP) may send a second request message to the RAN management network element, where the second request message is used to request routing information.
  • the RAN management network element may send the second response message to the first IAB host through the first interface.
  • the second reply message carries the routing information of the first IAB host (or the first IAB host DU) and/or the first IAB node.
  • the routing information of the first IAB host and/or the first IAB node may be determined before the RAN management network element receives the second request message, or may be determined after the RAN management network element receives the second request message.
  • the RAN management network element may first determine the first IAB host and/or the first IAB host in response to the second request message. /or routing information of the first IAB node, and then send a second response message to the first IAB host through the first interface.
  • some newly added IAB nodes and other related nodes may require routing information, and the second request message may carry the identifiers of the nodes that need routing information, and may also carry the topology information of these nodes.
  • the other relevant nodes may be terminal devices that have available transmission paths with the newly added IAB node, other IAB nodes or the first IAB host.
  • the RAN management network element can perform cell management on the IAB hosts and IAB nodes within the jurisdiction of the RAN management network element. It can be understood that the RAN management network element can determine the cells served by the IAB nodes and/or IAB hosts within its jurisdiction. The identity of the cell and the configuration information of the cell. It can be seen that the RAN management network element can manage the cells served by the first IAB host and/or the first IAB node, that is, the RAN management network element can determine the cells for the cells served by the first IAB host and/or the first IAB node. ID and cell configuration information.
  • FIG. 13 is a schematic diagram of an IAB host acquiring cell information according to an embodiment of the present invention.
  • the first IAB host can send a third request message to the RAN management network element, and the third request message is used for the first IAB host and/or cell information requested by the cell served by the first IAB node.
  • the RAN management network element may send a third response message to the first IAB host through the first interface.
  • the third response message carries the cell information of the cell serving the first IAB host and/or the first IAB node.
  • the cell information may be determined after the RAN management network element receives the third request message, or may be determined before receiving the third request message.
  • the RAN management network element may, in response to the third request message, first determine the cell of the cell served by the first IAB host and/or the first IAB node information, and then send a third response message to the first IAB host through the first interface.
  • the third request message may carry the identifier of the first IAB host (or the first IAB host DU) and/or the first IAB node, which may be understood as being carried.
  • the third request message may also carry the identity of the cell serving the first IAB host and/or the first IAB node.
  • the first IAB host may also carry the need to update in the third request message.
  • the identifier of the cell for the resource configuration of the cell.
  • the updating of the cell information can be understood as updating or reconfiguring the resource configuration of the cell, and it can also be understood as updating or reconfiguring the identity of the cell and the resource configuration of the cell.
  • first request message, second request message and third request message may be combined into one request message, that is, one request message may simultaneously request address information, routing information and cell information.
  • the above-mentioned first request message, second request message and third request message may also be combined into two request messages.
  • one request message may request both address information and routing information, and another request message may request cell information.
  • one request message may request address information and cell information at the same time, and another request message may request routing information.
  • one request message may request routing information and cell information information at the same time, and another request information message may request address information.
  • the configuration information of the first IAB host may be the configuration information of the DU of the first IAB host.
  • the RAN management network element sends the configuration information of the first IAB host and/or the first IAB node to the first IAB host.
  • the first IAB host (or the first IAB host CU, or the first IAB host CU-CP) receives the configuration information of the first IAB host and/or the first IAB node from the RAN management network element, that is, through the first The interface receives configuration information of the first IAB host and/or the first IAB node from the RAN management network element.
  • the RAN management network element may send the configuration information of the first IAB host and/or the first IAB node to the first IAB host through the first interface.
  • the first IAB host may also send a request message to the RAN management network element, where the request message is used to request the above configuration information.
  • the RAN management network element may send configuration information to the first IAB host through the first interface in response to the request message.
  • the request message may include the number of addresses required by the first IAB node and/or the first IAB host, and the identity of the first IAB node and/or the first IAB host.
  • the request message may include topology information, and the topology information may include the connection relationship between the first IAB host and/or the first IAB node and other nodes.
  • the request message may include the identity of the cell serving the first IAB host and/or the first IAB node.
  • the request message may include the number of addresses required by the first IAB node and/or the first IAB host, the identity of the first IAB node and/or the first IAB host, topology information, and the number of addresses for the first IAB host and/or the first IAB host.
  • One or more of the identities of cells served by the IAB node For a detailed description, refer to the related description in step 901 .
  • the first IAB host obtains one or more of address information, routing information and cell information.
  • the first IAB host After the first IAB host receives the configuration information of the first IAB host and/or the first IAB node from the RAN management network element, it can obtain the first IAB host from the configuration information of the first IAB host and/or the first IAB node and/or one or more of address information, routing information and cell information of the first IAB node for subsequent use in data or signaling transmission.
  • the data or signaling may include uplink data or uplink signaling, that is, data or signaling sent by the terminal device to the first IAB host, or signaling sent by the IAB node to the first IAB host.
  • the data or signaling may also be downlink data or downlink signaling, that is, data sent by the first IAB host to the terminal device, or signaling sent by the first IAB host to the IAB node.
  • the first IAB host may send the configuration information of the first IAB node to the first IAB node.
  • the first IAB node After receiving the configuration information of the first IAB node from the RAN management network element, the first IAB host may send the configuration information of the first IAB node to the first IAB node.
  • the first IAB node After the first IAB node receives the configuration information of the first IAB node from the first IAB host, it can obtain one or more of the address information, routing information and cell information of the first IAB node from the configuration information of the first IAB node.
  • the address information, routing information and cell information of the first IAB node Various for subsequent use in data or signaling transmission.
  • the first IAB host receives the configuration of the first IAB host (or the first IAB host DU) and/or the first IAB node from the RAN management network element After the information, the configuration information of the IAB host DU and/or IAB node within the jurisdiction of the first IAB host can be obtained (specifically including one or more of address information, routing information and cell information).
  • the subsequent first IAB host may send the configuration information of the first IAB node to the first IAB node.
  • the subsequent first IAB host CU may also send the configuration information of the first IAB host DU to the first IAB host DU .
  • the first IAB host may forward the configuration information of the first IAB node to the first IAB node.
  • the first IAB host needs to determine the configuration information of the first IAB node first, and then can send the configuration information of the first IAB node to the first IAB node. It can be seen that when the RAN management network element has determined the configuration information of the first IAB node and/or the first IAB host, the first IAB host does not need to determine the configuration information of the first IAB node and/or the first IAB host.
  • the first IAB host needs to determine the configuration information of the first IAB node and/or the first IAB host. For example, when the address information includes the BAP layer identification list as shown in Table 1 and/or the IP address list shown in Table 5, the first IAB host first needs to determine the BAP layer identification of the first IAB host and/or the first IAB node, and/or the IP address of the first IAB node.
  • FIG. 14 is a schematic flowchart of another communication method disclosed by an embodiment of the present invention. As shown in FIG. 14 , the communication method may include the following steps.
  • the first IAB host sends a first interface establishment request message to the RAN management network element.
  • the RAN management network element receives the first interface establishment request message from the first IAB host.
  • a first interface establishment request message may be sent to the RAN management network element first.
  • the first interface establishment request message is used to request establishment of the first interface.
  • the first interface setup request message may be the first interface setup request message, or may be other messages, and its name is not limited.
  • the first interface establishment request message may carry the identifier of the first IAB host.
  • the identity of the first IAB host may be the identity of the first IAB host CU, the identity of the first IAB host CU-CP, the identity (gNB ID) of the base station corresponding to the first IAB host, or the first IAB host.
  • the identifier of an IAB host DU may also be other information that can be used to uniquely identify the first IAB host.
  • the identifier of the first IAB host CU may be the name of the CU, or may be the CU ID configured by the OAM for the first IAB host CU, may also be the IP address of the first IAB host CU, or may be other uniquely identifying the first IAB. Information about the host CU.
  • the first interface establishment request message may also carry topology information.
  • the topology information may include an identifier of a node managed by the first IAB host and a connection relationship between the nodes.
  • the nodes managed by the first IAB host may include IAB nodes managed by the first IAB host. When the CU and DU of the first IAB host are separated, the node managed by the first IAB host may also include one or more host DUs of the first IAB host.
  • the node managed by the first IAB host may also include a terminal device.
  • the connection relationship between the nodes may include the connection relationship between the IAB nodes, the connection relationship between the IAB node and the terminal device, and the connection relationship between the IAB node and the IAB host (or the IAB host DU).
  • the connection relationship can be a parent-child relationship.
  • the RAN management network element sends a first interface setup response message to the first IAB host.
  • the first IAB host receives the first interface establishment response message from the RAN management network element.
  • the RAN management network element may send the first interface establishment response message to the first IAB host.
  • the first IAB host receives the first interface establishment response message from the RAN management network element, it indicates that the establishment of the first interface between the first IAB host and the RAN management network element is completed, and the first interface between the first IAB host and the RAN management network element is completed. Communication can take place through the first interface.
  • the first interface establishment response message may be a first interface setup response message, an interface setup response message, or other messages, and its name is not limited.
  • the first interface may be an Ex interface or other interfaces, and its name is not limited.
  • the first interface establishment response message may carry configuration information, and the configuration information may be configuration information of the first IAB host and/or the first IAB node.
  • the request message in step 902 may be a first interface establishment request message.
  • the first IAB host sends a first update request message to the RAN management network element through the first interface.
  • the RAN management network element receives the first update request message from the first IAB host (or the first IAB host CU or the first IAB host CU-CP).
  • the first update request message is sent to the RAN management network element through the first interface, that is, the IAB configuration update process is initiated to the RAN management network element.
  • the first update request message is used to obtain updated configuration information of the first IAB node and/or the first IAB host.
  • the first update request message may be an IAB configuration update request message (that is, an IAB CONFIGURATIONUPDATE REQUEST message), or may be other messages, and its name is not limited.
  • the first update request message may carry the updated topology information of the node managed by the first IAB host.
  • the updated topology information may include the identifier of the newly added IAB node, and the connection relationship between the newly added IAB node and the existing IAB node.
  • the updated topology information may also include the identifier of the IAB node that has left (including the IAB node that has been switched away, or the IAB node that is dormant, etc.).
  • the updated topology information may also include updated information of the connection relationship between existing IAB nodes and the identifiers of these IAB nodes.
  • the updated topology information may include the identifiers of the IAB nodes whose connection relationships are updated, and the updated connection relationships of these IAB nodes.
  • the RAN management network element sends a first update response message to the first IAB host.
  • the first IAB host (or the first IAB host CU or the first IAB host CU-CP) receives the first update response message from the RAN management network element.
  • the RAN management network element may send the first update response message to the first IAB host.
  • the first update response message may be an IAB configuration update response message (that is, an IAB CONFIGURATIONUPDATE ACKNOWLEDGE/RESPONSE message), or may be other messages, and its name is not limited.
  • the first update response message may carry configuration information of the first IAB host and/or the first IAB node.
  • the request message in step 902 may be the first update request message.
  • the first IAB host sends a first interface release request message to the RAN management network element.
  • the RAN management network element receives the first interface release request message from the first IAB host.
  • the first IAB host may send a first interface release request message to the RAN management network element.
  • the reason may be that no IAB nodes within the jurisdiction of the first IAB host are no longer connected to the first IAB host, or that all IAB nodes connected to the first IAB host are in an idle state or inactive (inactive) )state.
  • the first interface release request message may carry the identity of the first IAB host, and is used to request to release the first interface between the first IAB host and the RAN management network element, that is, to request the removal of the first IAB host and the RAN management network element. the first interface between.
  • the first interface release request message may be sent by an IAB node that is not in an active state under the first IAB host, or may be sent under other circumstances, which is not limited herein.
  • the first interface release request message may be the first interface release request message, or may be other messages, and its name is not limited.
  • the RAN management network element sends a first interface release response message to the first IAB host.
  • the first IAB host receives the first interface release response message from the RAN management network element.
  • the RAN management network element After the RAN management network element receives the first interface release request message from the first IAB host, it can release the first interface between the first IAB host and the RAN management network element, and then can send the first interface release to the first IAB host response message.
  • the RAN management network element releases the first interface between the first IAB host and the RAN management network element. It can be understood that the RAN management network element can remove various configuration information on the first interface and erase the first IAB host. Various contextual information related to all IAB nodes (and end devices).
  • step 1405 may be replaced by: the RAN management network element sends a first interface release request message to the first IAB host.
  • step 1406 may be replaced by: the first IAB host sends a first interface release response message to the RAN management network element.
  • the first interface release failure message can be an Ex RELEASE/REMOVAL FAILURE message, or other messages, and its name is not limited.
  • the first interface release failure message may carry a cause value (Cause value), which is used to indicate the reason for the release failure.
  • steps 1401 to 1406 must be performed.
  • steps 1403 and 1404 may or may not be performed.
  • steps 1405 and 1406 may or may not be performed.
  • FIG. 15 is a schematic flowchart of another communication method disclosed by an embodiment of the present invention. As shown in FIG. 15 , the communication method may include the following steps.
  • a first interface is established between the RAN management network element and the first IAB host, and communication between the RAN management network element and the first IAB host (or the first host CU or the first host CU-CP) can be performed through the first interface.
  • a second interface is established between the RAN management network element and the first IAB node, and communication between the RAN management network element and the first IAB node can be performed through the second interface.
  • the first IAB host and the first IAB node may be connected through a wireless backhaul link.
  • the RAN management network element determines the configuration information of the first IAB node.
  • the RAN management network element may determine the configuration information of the first IAB node.
  • the configuration information of the first IAB node may include one or more of address information, routing information and cell information of the first IAB node.
  • the address information of the first IAB node may include a BAP layer identifier and/or an IP address of the first IAB node.
  • the routing information of the first IAB node may include an adaptation layer routing identifier and/or a routing mapping table of the first IAB node.
  • the route mapping table of the first IAB node includes the adaptation layer routing identifier of the first IAB node and the identifier of the next hop node.
  • the routing information of the first IAB node may include an adaptation layer routing identifier, and may also include a routing mapping table.
  • the default or default route of the first IAB node may be determined as the routing mapping of the first IAB node surface.
  • the routing information of the first IAB node includes a routing mapping table of the first IAB node.
  • the cell information of the first IAB node includes the identity of the cell serving the first IAB node and the resource configuration of the cell. For a detailed description, refer to the related description in step 901 .
  • the RAN management network element sends the configuration information of the first IAB node to the first IAB node through the second interface.
  • the first IAB node receives configuration information from the first IAB node of the RAN management network element through the second interface.
  • the RAN management network element After the RAN management network element determines the configuration information of the first IAB node, it may send the configuration information of the first IAB node to the first IAB node through the second interface.
  • a second request message may be sent to the RAN management network element through the second interface, where the second request message is used to request the configuration information of the first IAB node.
  • the RAN management network element receives the second request message from the first IAB node, and may send the configuration information to the first IAB node through the second interface in response to the second request message.
  • the configuration information of the first IAB node may be determined before the RAN management network element receives the second request message, or may be determined in response to the second request message after the RAN management network element receives the second request message.
  • the second request message may include the identity of the first IAB node.
  • the configuration information of the first IAB node is determined before the RAN management network element receives the second request message, after the RAN management network element receives the second request message, it may respond to the second request message and send to the first IAB node Configuration information of the first IAB node.
  • the address information of the first IAB node may include a BAP layer identifier and/or an IP address.
  • the RAN management network element may determine the address information of the first IAB node according to the number of addresses required by the first IAB node.
  • the second request message may include the number of addresses required by the first IAB node and the identity of the first IAB node.
  • the RAN management network element receives the second request message, in response to the second request message, first determine the address information of the first IAB node according to the number of addresses required by the first IAB node, and then send the first IAB node to the first IAB node through the second interface.
  • the configuration information of the first IAB node is sent.
  • the second request message may include second topology information, and the second topology information may include the connection relationship between the first IAB node and the parent node and/or child node of the first IAB node.
  • the connection relationship between the first IAB node and the parent node and/or child node of the first IAB node may include the identifiers of one or more parent nodes connected to the first IAB node, and one or more parent nodes connected to the first IAB node. or the identifiers of multiple child nodes.
  • the connection relationship between the first IAB node and the parent node and/or child node of the first IAB node may also include the identifiers of one or more terminal devices connected to the first IAB node, and the first IAB node passes through one or more wireless segments.
  • the second topology information may also include the identifier of the newly added IAB node, and the connection relationship between the newly added IAB node and the existing IAB node.
  • the second request message may include the identity of the cell serving the first IAB node.
  • the second request message may include any of the identity of the first IAB node (or the number of addresses required by the first IAB node and the identity of the first IAB node), the second topology information, and the identity of the cell serving the first IAB node. Both or all three are included.
  • the first IAB node acquires one or more of address information, routing information and cell information of the first IAB node.
  • the first IAB node After receiving the configuration information of the first IAB node from the RAN management network element through the second interface, the first IAB node may acquire one or more of address information, routing information and cell information of the first IAB node. For a detailed description, reference may be made to the related description of the first IAB node below step 903 .
  • the RAN management network element sends the configuration information of the first IAB node to the first IAB host through the first interface.
  • the RAN management network element After the RAN management network element determines the configuration information of the first IAB node, it may send the configuration information of the first IAB node to the first IAB host through the first interface. After receiving the configuration information of the first IAB node from the RAN management network element, the first IAB host can obtain one or more of the address information, routing information and cell information of the first IAB node, and store the first IAB node's address information, routing information and cell information. One or more of address information, routing information and cell information for subsequent transmission of data or signaling.
  • the first IAB node can directly communicate with the RAN management network element through the second interface, without going through the first IAB host.
  • the RAN management network element can still send the configuration information of all IAB nodes managed by the first IAB host to the first IAB host, so as to ensure normal data transmission.
  • the RAN management network element may send the configuration information of the first IAB node to the first IAB host CU (or the first IAB host CU-CP) through the first interface.
  • the RAN management network element can also determine the configuration information of the first IAB host, that is, the configuration information configured for the first IAB host, and then can send the configuration information of the first IAB host to the first IAB host through the first interface.
  • the configuration information of the first IAB host may include one or more of address information, routing information and cell information of the first IAB host.
  • the first IAB host can receive the configuration information of the first IAB host from the RAN management network element through the first interface, and then can obtain one or more of the address information, routing information and cell information of the first IAB host. , which stores one or more of the address information, routing information and cell information of the first IAB host for subsequent data or signaling transmission.
  • step 901 refer to step 901 .
  • a first request message may be sent to the RAN management network element through the first interface, where the first request message is used to request the configuration information of the first IAB host.
  • the RAN management network element receives the first request message from the first IAB host, and may send the configuration information of the first IAB host to the first IAB host through the first interface in response to the first request message.
  • the configuration information of the first IAB host may be determined before the RAN management network element receives the first request message, or may be determined in response to the first request message after the RAN management network element receives the first request message.
  • the first request message may include the identity of the first IAB host.
  • the first request message may include the number of addresses required by the first IAB host and the identity of the first IAB host.
  • the first request message may include first topology information, and the first topology information may include the connection relationship between the first IAB host and the IAB node.
  • the first request message may include the identity of the cell serving the first IAB host.
  • the first request message may include any of the identity of the first IAB host (or the number of addresses required by the first IAB host and the identity of the first IAB host), the first topology information, and the identity of the cell serving the first IAB host. Both or all three are included.
  • the RAN management network element determines the configuration information of the first IAB host DU, and the RAN management network element can send the information of the first IAB host DU to the first IAB host DU through the third interface. configuration information.
  • the first IAB host DU can receive the configuration information of the first IAB host DU from the RAN management network element through the third interface, and then can obtain one of the address information, routing information and cell information of the first IAB host DU. Or more, store one or more of address information, routing information, and cell information of the first IAB host DU, so as to transmit data or signaling later.
  • the RAN management network element may also send the configuration information of the first IAB host DU to the first IAB host CU (or the first IAB host CU-CP) through the first interface.
  • the first IAB host CU (or the first IAB host CU-CP) can receive the configuration information of the first IAB host DU from the RAN management network element through the first interface, and then can obtain the address information of the first IAB host DU.
  • one or more of routing information and cell information, and one or more of the address information, routing information and cell information of the first IAB host DU is stored for subsequent data or signaling transmission.
  • a first request message may be sent to the RAN management network element through the third interface, where the first request message is used to request the configuration information of the first IAB host DU.
  • the RAN management network element receives the first request message from the first IAB host DU, and may send the configuration information of the first IAB host DU to the first IAB host through the third interface in response to the first request message.
  • the configuration information of the first IAB host DU may be determined before the RAN management network element receives the first request message, or may be determined in response to the first request message after the RAN management network element receives the first request message.
  • the first request message may include the identity of the first IAB host DU (or the number of addresses required by the first IAB host DU and the identity of the first IAB host DU), the first topology information, and the information of the cell serving the first IAB host DU. one or more of the identities.
  • the first topology information may include the connection relationship between the first IAB host DU and the IAB node.
  • first interface and the second interface are different interfaces.
  • the first interface and the third interface are different interfaces.
  • the second interface and the third interface may be the same or different.
  • FIG. 16 is a schematic flowchart of another communication method disclosed by an embodiment of the present invention. As shown in FIG. 16, the communication method may include the following steps.
  • the first IAB host communicates with the RAN management network element through the first interface.
  • the first IAB node communicates with the RAN management network element through the second interface.
  • FIG. 16 is applicable to the scenario where the DU and CU of the first IAB host are not separated.
  • the first IAB host sends a first interface establishment request message to the RAN management network element.
  • the RAN management network element receives the first interface establishment request message from the first IAB host.
  • a first interface establishment request message may be sent to the RAN management network element first.
  • the first interface establishment request message is used to request establishment of the first interface.
  • the first interface establishment request message may carry one or more of the identity of the first IAB host, topology information, and the identity of the cell serving the first IAB host. For a detailed description of the topology information and the first interface establishment request message, reference may be made to step 1401 .
  • the first request message in step 1504 may be a first interface establishment request message.
  • the RAN management network element sends a first interface setup response message to the first IAB host.
  • step 1602 may refer to step 1402.
  • the configuration information carried in the first interface establishment response message is the configuration information of the first IAB host.
  • the first IAB host sends a first update request message to the RAN management network element through the first interface.
  • the first IAB host can send a first update request message to the RAN management network element through the first interface.
  • the change of the node connected to the first IAB host may be that a node connected to the first IAB host is newly added, or the node connected to the first IAB host is reduced.
  • the first request message in step 1504 may be a first interface update request message.
  • the RAN management network element sends a first update response message to the first IAB host.
  • step 1604 can refer to step 1404.
  • the configuration information carried in the first interface update response message is the configuration information of the first IAB host.
  • the first IAB node sends a second interface establishment request message to the RAN management network element.
  • the RAN management network element receives the second interface establishment request message from the first IAB node.
  • the first IAB node When the first IAB node needs to communicate with the first IAB host, it may first send a second interface establishment request message to the RAN management network element.
  • the second interface establishment request message is used to request establishment of the second interface.
  • the second interface setup request message may be the second interface setup request message, or may be other messages, and its name is not limited.
  • the second interface establishment request message may carry one or more of an identifier of the first IAB node, topology information, and an identifier of a cell serving the first IAB node.
  • the topology information may include identifiers of other nodes connected to the first IAB node. For details, reference may be made to the description of the second topology information in step 1502 for understanding.
  • the second request message under step 1502 may be a second interface establishment request message.
  • the RAN management network element sends a second interface setup response message to the first IAB node.
  • the first IAB node receives the second interface setup response message from the RAN management network element.
  • the RAN management network element may send the second interface establishment response message to the first IAB node.
  • the first IAB node After receiving the second interface establishment request message from the first IAB node, the RAN management network element may send the second interface establishment response message to the first IAB node.
  • the first IAB node After the first IAB node receives the second interface establishment response message from the RAN management network element, it indicates that the establishment of the second interface between the first IAB node and the RAN management network element is completed, and the connection between the first IAB node and the RAN management network element is completed. Communication can take place through the second interface.
  • the second interface establishment response message may be the second interface setup response message, the second interface setup response message, or other messages, and its name is not limited.
  • the second interface may be the Ey interface or other interfaces, and its name is not limited.
  • the second interface establishment response message may carry the configuration information of the first IAB node.
  • the first IAB node sends a second update request message to the RAN management network element through the second interface.
  • the RAN management network element receives the second update request message from the first IAB node.
  • the first IAB node can send a second update request message to the RAN management network element through the second interface, that is, Initiate the IAB configuration update process to the RAN management network element.
  • the second update request message is used to obtain the updated configuration information of the first IAB node.
  • the second update request message may be an IAB configuration update request message (that is, an IAB CONFIGURATIONUPDATE REQUEST message), or may be other messages, and its name is not limited.
  • the second update request message may carry the topology information updated by the first IAB node.
  • the updated topology information may include an identifier of a node connected to the first IAB node and a connection relationship.
  • the second request message under step 1502 may be a second interface update request message.
  • the RAN management network element sends a second update response message to the first IAB node.
  • the first IAB node receives the second update response message from the RAN management network element.
  • the RAN management network element may send the second update response message to the first IAB node.
  • the second update response message may be an IAB configuration update response message (that is, an IAB CONFIGURATIONUPDATE ACKNOWLEDGE/RESPONSE message), or may be other messages, and its name is not limited.
  • the second update response message may carry the configuration information of the first IAB node.
  • the first IAB host sends a first interface release request message to the RAN management network element.
  • step 1609 may refer to step 1405.
  • the RAN management network element sends a first interface release response message to the first IAB host.
  • step 1610 may refer to step 1406.
  • the first IAB node sends a second interface release request message to the RAN management network element.
  • the RAN management network element receives the second interface release request message from the first IAB node.
  • the first IAB node may send a second interface release request message to the RAN management network element.
  • the second release request message may carry the identifier of the first IAB node, and is used to request to release the second interface between the first IAB node and the RAN management network element, that is, to request to remove the connection between the first IAB node and the RAN management network element. the second interface between.
  • the second interface release request message may be the second interface release request message, or may be other messages, and its name is not limited.
  • the RAN management network element sends a second interface release response message to the first IAB node.
  • the first IAB node receives the second interface release response message from the RAN management network element.
  • the RAN management network element After the RAN management network element receives the second interface release request message from the first IAB node, it can release the second interface between the first IAB node and the RAN management network element, and then can send the second interface release to the first IAB node response message.
  • the RAN management network element releases the second interface between the first IAB node and the RAN management network element. It can be understood that the RAN management network element can remove various configuration information on the second interface, and erase the first IAB node related information. Various contextual information.
  • step 1611 may be replaced with: the RAN management network element sends a second interface release request message to the first IAB node.
  • step 1612 may be replaced by: the first IAB node sends a second interface release response message to the RAN management network element.
  • steps 1601-1612 may or may not be performed.
  • steps 1603 and 1604 may or may not be performed.
  • steps 1609 and 1610 may or may not be performed.
  • steps 1607 and 1608 may or may not be performed.
  • steps 1611 and 1612 may or may not be performed.
  • steps 1601-1612 can be adjusted.
  • steps 1605-1606 may be performed before steps 1603 and 1604.
  • FIG. 17 is a schematic flowchart of another communication method disclosed by an embodiment of the present invention. As shown in FIG. 17 , the communication method may include the following steps.
  • the first IAB host CU (or the first IAB host CU-CP) communicates with the RAN management network element through the first interface.
  • the first IAB node communicates with the RAN management network element through the second interface.
  • Communication is performed between the first IAB host DU and the RAN management network element through a third interface.
  • the first IAB host CU (or the first IAB host CU-CP) sends a first interface establishment request message to the RAN management network element.
  • the RAN management network element receives the first interface establishment request message from the first IAB host CU (or the first IAB host CU-CP).
  • the RAN can be The management network element sends a first interface establishment request message.
  • the first interface establishment request message is used to request establishment of the first interface.
  • the first interface establishment request message may carry the identifier of the first IAB host CU (or the first IAB host CU-CP).
  • the nodes managed by the first IAB host CU (or the first IAB host CU-CP) may include IAB nodes and terminal devices, and may also include the first IAB host DU.
  • the RAN management network element sends a first interface setup response message to the first IAB host CU (or the first IAB host CU-CP).
  • the first IAB host CU (or the first IAB host CU-CP) receives the first interface setup response message from the RAN management network element.
  • the RAN management network element may send the first interface establishment request message to the first IAB host CU (or the first IAB host CU-CP).
  • An interface setup response message After the first IAB host CU (or the first IAB host CU-CP) receives the first interface establishment response message from the RAN management network element, it indicates that the first IAB host CU (or the first IAB host CU-CP) and the RAN management The establishment of the first interface between the network elements is completed, and the first IAB host CU (or the first IAB host CU-CP) and the RAN management network element can communicate through the first interface.
  • the first IAB node sends a second interface establishment request message to the RAN management network element.
  • step 1703 can refer to step 1605.
  • the RAN management network element sends a second interface setup response message to the first IAB node.
  • step 1704 may refer to step 1606.
  • the first IAB host DU sends a third interface establishment request message to the RAN management network element.
  • the RAN management network element receives the third interface setup request message from the first IAB host DU.
  • the first IAB host DU may first send a third interface establishment request message to the RAN management network element.
  • the third interface establishment request message is used to request the establishment of the third interface.
  • the third interface establishment request message may carry one or more of the identity of the first IAB host DU, topology information, and the identity of the cell serving the first IAB host DU.
  • the topology information may include identities of other nodes connected to the first IAB host DU.
  • Other nodes connected to the first IAB host DU may include the IAB node and the first IAB host CU (or the first IAB host CU-CP).
  • the first request message in step 1504 may be a third interface establishment request message.
  • the RAN management network element sends a third interface setup response message to the first IAB host DU.
  • the first IAB host DU receives the third interface setup response message from the RAN management network element.
  • the RAN management network element may send a third interface establishment response message to the first IAB host DU.
  • the first IAB host DU receives the third interface establishment response message from the RAN management network element, it indicates that the establishment of the third interface between the first IAB host DU and the RAN management network element is completed, and the first IAB host DU and the RAN management network element are completed.
  • the elements can communicate through the third interface.
  • the third interface establishment response message may carry the configuration information of the first IAB host DU.
  • the first IAB host DU sends a first update request message to the RAN management network element through the third interface.
  • the RAN management network element receives the first update request message from the first IAB host DU.
  • the first IAB host DU can send a first update request to the RAN management network element through the third interface message, that is, the IAB configuration update process is initiated to the RAN management network element.
  • the first update request message is used to obtain the updated configuration information of the first IAB host DU.
  • the first update request message may be the host DU configuration update request message (that is, the IAB donor DU CONFIGURATIONUPDATE REQUEST message), or may be other messages, and its name is not limited.
  • the first update request message may carry the topology information updated by the first IAB host DU.
  • the updated topology information may include an identifier of a node connected to the first IAB host DU and a connection relationship.
  • the node connected with the first IAB host DU may refer to other nodes connected with the first IAB host DU in step 1705 .
  • the first request message in step 1504 may be the first update request message.
  • the RAN management network element sends a first update response message to the first IAB host DU.
  • the first IAB host DU receives the first update response message from the RAN management network element.
  • the RAN management network element may send the first update response message to the first IAB host DU.
  • the first update response message may be the host DU configuration update response message (that is, the IABdonor DU CONFIGURATIONUPDATE ACKNOWLEDGE/RESPONSE message), or may be other messages, and its name is not limited.
  • the first IAB node sends a second update request message to the RAN management network element through the second interface.
  • step 1709 may refer to step 1607.
  • the RAN management network element sends a second update response message to the first IAB node.
  • step 1710 may refer to step 1608.
  • the first IAB host CU (or the first IAB host CU-CP) sends a first interface release request message to the RAN management network element.
  • step 1711 may refer to step 1609.
  • the RAN management network element sends a first interface release response message to the first IAB host CU (or the first IAB host CU-CP).
  • step 1712 may refer to step 1610.
  • the first IAB node sends a second interface release request message to the RAN management network element.
  • step 1713 can refer to step 1611.
  • the RAN management network element sends a second interface release response message to the first IAB node.
  • step 1714 may refer to step 1612.
  • the first IAB host DU sends a third interface release request message to the RAN management network element.
  • the RAN management network element receives the third interface release request message from the first IAB host DU.
  • a third interface release request message may be sent to the RAN management network element.
  • the third release request message may carry the identifier of the first IAB host DU, and is used to request to release the third interface between the first IAB host DU and the RAN management network element, that is, to request the removal of the first IAB host DU and the RAN management network element.
  • the third interface release request message may be the third interface release request message, or may be other messages, and its name is not limited.
  • the RAN management network element sends a third interface release response message to the first IAB host DU.
  • the first IAB host DU receives the third interface release response message from the RAN management network element.
  • the RAN management network element After the RAN management network element receives the third interface release request message from the first IAB host DU, it can release the third interface between the first IAB host DU and the RAN management network element, and then can send the third interface to the first IAB host DU.
  • the three-interface release response message After the RAN management network element receives the third interface release request message from the first IAB host DU, it can release the third interface between the first IAB host DU and the RAN management network element, and then can send the third interface to the first IAB host DU.
  • the three-interface release response message After the RAN management network element receives the third interface release request message from the first IAB host DU, it can release the third interface between the first IAB host DU and the RAN management network element, and then can send the third interface to the first IAB host DU.
  • the three-interface release response message After the RAN management network element receives the third interface release request message from the first IAB host DU, it can release the third interface between the
  • the RAN management network element releases the third interface between the first IAB host DU and the RAN management network element. It can be understood that the RAN management network element can remove various configuration information on the third interface and erase the first IAB host DU. relevant contextual information.
  • step 1715 may be replaced by: the RAN management network element sends a third interface release request message to the first IAB host DU.
  • step 1716 may be replaced by: the first IAB host DU sends a third interface release response message to the RAN management network element.
  • steps 1707 and 1708 may or may not be performed.
  • steps 1709 and 1710 may or may not be performed.
  • steps 1711 and 1712 may or may not be performed.
  • steps 1713 and 1714 may or may not be performed.
  • steps 1715 and 1716 may or may not be performed.
  • steps 1701 to 1716 can be adjusted.
  • steps 1715-1716 may be performed before steps 1713 and 1714.
  • the communication between the first IAB host and the RAN management network element through the first interface can be understood as the first IAB host CU and the RAN Communication between network elements through the first interface is managed.
  • the communication between the first IAB host and the RAN management network element through the first interface can be understood as The first IAB hosts the communication between the CU-CP and the RAN management network element through the first interface.
  • the functions performed by the RAN management network element in the above communication method may also be performed by a module (for example, a chip) in the RAN management network element, and the functions performed by the first IAB host may also be performed by the first IAB host.
  • a module (eg, a chip) to perform the functions performed by the first IAB node may also be performed by a module (eg, a chip) in the first IAB node.
  • FIG. 18 is a schematic structural diagram of a communication device disclosed in an embodiment of the present invention.
  • the communication apparatus may include a determining unit 1801 and a sending unit 1802 .
  • the RAN management network element may further include a receiving unit 1803 .
  • the communication device may be a RAN management network element
  • the RAN management network element may be connected to a first IAB host through a first interface
  • the first IAB host and the first IAB node are connected through a wireless backhaul link.
  • a determining unit 1801 configured to determine configuration information of the first IAB host and/or the first IAB node, where the configuration information includes one or more of address information, routing information and cell information;
  • the sending unit 1802 is configured to send the configuration information to the first IAB host.
  • the receiving unit 1803 is configured to receive a request message from the first IAB host
  • the sending unit 1802 is specifically configured to send the configuration information to the first IAB host in response to the request message.
  • the address information includes a BAP layer identification and/or an IP address.
  • the routing information includes an adaptation layer routing identifier and/or a routing mapping table
  • the routing mapping table includes an adaptation layer routing identifier and an identifier of a next-hop node.
  • the cell information includes the identity of the cell and the resource configuration of the cell.
  • the resource configuration of the cell includes one or more of frequency point information of the cell, bandwidth information of the cell, and uplink and downlink duplex modes of the cell.
  • the request message includes the number of addresses required by the first IAB node and/or the first IAB host, and the identity of the first IAB node and/or the first IAB host.
  • the request message includes topology information
  • the topology information includes the connection relationship between the first IAB host and/or the first IAB node and other nodes.
  • the request message includes the identity of the cell serving the first IAB host and/or the first IAB node.
  • the request message is a first interface establishment request message or an IAB configuration update request message.
  • the communication device may be a RAN management network element, the RAN management network element is connected to the first IAB host through a first interface, the RAN management network element is connected to the first IAB node through a second interface, and the first IAB host is connected to the first IAB node through a second interface.
  • the first IAB node is connected by a wireless backhaul link.
  • a determining unit 1801 configured to determine configuration information of the first IAB node, where the configuration information of the first IAB node includes one or more of address information, routing information and cell information;
  • the sending unit 1802 is configured to send the configuration information of the first IAB node to the first IAB node through the second interface.
  • the sending unit 1802 is further configured to send the configuration information of the first IAB node to the first IAB host through the first interface.
  • the determining unit 1801 is further configured to determine configuration information of the first IAB host
  • the sending unit 1802 is further configured to send the configuration information of the first IAB host to the first IAB host through the first interface.
  • the address information of the first IAB node includes a BAP layer identifier and/or an IP address.
  • the routing information of the first IAB node includes an adaptation layer routing identifier and/or a routing mapping table
  • the routing mapping table includes an adaptation layer routing identifier and an identifier of the next hop node.
  • the cell information of the first IAB node includes the identity of the cell and the resource configuration of the cell.
  • the resource configuration of the cell includes one or more of frequency point information of the cell, bandwidth information of the cell, and uplink and downlink duplex modes of the cell.
  • the receiving unit 1803 is configured to receive the first request message from the first IAB host
  • the sending unit 1802 sends the configuration information of the first IAB host to the first IAB host through the first interface, including:
  • the configuration information of the first IAB host is sent to the first IAB host through the first interface.
  • the first request message includes the number of addresses required by the first IAB host and the identity of the first IAB host.
  • the first request message includes first topology information
  • the first topology information includes a connection relationship between the first IAB host and the IAB node.
  • the first request message includes the identity of the cell serving the first IAB host.
  • the first request message is a first interface establishment request message or an IAB configuration update request message.
  • the receiving unit 1803 is further configured to receive the second request message from the first IAB node;
  • the sending unit 1802 sending configuration information to the first IAB node through the second interface includes:
  • the configuration information is sent to the first IAB node through the second interface.
  • the second request message includes the number of addresses required by the first IAB node and the identity of the first IAB node.
  • the second request message includes second topology information
  • the second topology information includes the connection relationship between the first IAB node and the parent node and/or child node of the first IAB node.
  • the second request message includes the identity of the cell serving the first IAB node.
  • the second request message is a second interface setup request message or an IAB configuration update request message.
  • FIG. 19 is a schematic structural diagram of another communication apparatus disclosed in an embodiment of the present invention.
  • the communication apparatus may include a receiving unit 1901 and an obtaining unit 1902 , and the communication apparatus may further include a sending unit 1903 .
  • the communication device may be a first IAB host, the first IAB host is connected to the RAN management network element through a first interface, and the first IAB host and the first IAB node are connected through a wireless backhaul link.
  • a receiving unit 1901 configured to receive configuration information of the first IAB host and/or the first IAB node from the RAN management network element through the first interface, where the configuration information includes one or more of address information, routing information and cell information. kind;
  • the obtaining unit 1902 is configured to obtain one or more of address information, routing information and cell information.
  • the sending unit 1903 is configured to send a request message to the RAN management network element, where the request message is used to request the configuration information.
  • the sending unit 1903 is further configured to send the configuration information of the first IAB node to the first IAB node.
  • the address information includes a BAP layer identification and/or an IP address.
  • the routing information includes an adaptation layer routing identifier and/or a routing mapping table
  • the routing mapping table includes an adaptation layer routing identifier and an identifier of a next-hop node.
  • the cell information includes the identity of the cell and the resource configuration of the cell.
  • the resource configuration of the cell includes one or more of frequency point information of the cell, bandwidth information of the cell, and uplink and downlink duplex modes of the cell.
  • the request message includes the number of addresses required by the first IAB node and/or the first IAB host, and the identity of the first IAB node and/or the first IAB host.
  • the request message includes topology information
  • the topology information includes the connection relationship between the first IAB host and/or the first IAB node and other nodes.
  • the request message includes the identity of the cell serving the first IAB host and/or the first IAB node.
  • the request message is a first interface setup request message or an IAB configuration update request message.
  • receiving unit 1901 More detailed descriptions of the above receiving unit 1901, acquiring unit 1902 and transmitting unit 1903 can be obtained directly by referring to the relevant descriptions of the first IAB host in the method embodiments shown in FIG. 9 to FIG. 14, and will not be repeated here.
  • the communication device may be a first IAB node, the first IAB node is connected to the first IAB host through a wireless backhaul link, and the first IAB node is connected to the radio access network RAN management network through a second interface Yuan. in:
  • a receiving unit 1901 configured to receive configuration information from the first IAB node of the RAN management network element through a second interface, where the configuration information includes one or more of address information, routing information and cell information;
  • the obtaining unit 1902 is configured to obtain one or more of address information, routing information and cell information.
  • the address information includes a BAP layer identification and/or an IP address.
  • the routing information includes an adaptation layer routing identifier and/or a routing mapping table
  • the routing mapping table includes an adaptation layer routing identifier and an identifier of a next-hop node.
  • the cell information includes the identity of the cell and the resource configuration of the cell.
  • the resource configuration of the cell includes one or more of frequency point information of the cell, bandwidth information of the cell, and uplink and downlink duplex modes of the cell.
  • the sending unit 1903 is configured to send a second request message to the RAN management network element through the second interface, where the second request message is used to request the configuration information.
  • the second request message includes the number of addresses required by the first IAB node and the identity of the first IAB node.
  • the second request message includes second topology information
  • the second topology information includes the connection relationship between the first IAB node and the parent node and/or child node of the first IAB node.
  • the second request message includes the identity of the cell serving the first IAB node.
  • the second request message is a second interface setup request message or an IAB configuration update request message.
  • receiving unit 1901 More detailed descriptions of the above receiving unit 1901 , acquiring unit 1902 and transmitting unit 1903 can be obtained directly by referring to the relevant descriptions of the first IAB node in the method embodiments shown in FIG. 15 to FIG. 17 , which are not repeated here.
  • FIG. 20 is a schematic structural diagram of another communication apparatus disclosed in an embodiment of the present invention.
  • the communication apparatus may include a processor 2001 , a memory 2002 , an input interface 2003 , an output interface 2004 and a bus 2005 .
  • the memory 2002 may exist independently, and may be connected to the processor 2001 through the bus 2005 .
  • the memory 2002 may also be integrated with the processor 2001.
  • the bus 2005 is used to realize the connection between these components.
  • the communication device may be a RAN management network element
  • the processor 2001 when the computer program instructions stored in the memory 2002 are executed, the processor 2001 is configured to control the receiving unit 1803 and the sending unit 1802 to perform the operations performed in the foregoing embodiments , the processor 2001 is further configured to perform the operations performed by the determining unit 1801 in the above embodiments, the input interface 2003 is configured to perform the operations performed by the receiving unit 1803 in the above embodiments, and the output interface 2004 is configured to perform the operations performed by the sending unit 1802 in the above embodiments action performed.
  • the above-mentioned RAN management network element may also be used to execute various methods performed by the RAN management network element in the above-mentioned method embodiments as shown in FIGS.
  • the communication device may be a first IAB host, and when the computer program instructions stored in the memory 2002 are executed, the processor 2001 is configured to control the receiving unit 1901 and the sending unit 1903 to perform the operations performed in the above embodiments , the processor 2001 is also used for the acquisition unit 1902 to perform the operations performed in the above embodiments, the input interface 2003 is used to perform the operations performed by the receiving unit 1901 in the above embodiments, and the output interface 2004 is used to perform the transmission unit 1903 in the above embodiments. action performed.
  • the foregoing first IAB host may also be used to execute various methods performed by the first IAB host in the foregoing method embodiments in FIGS. 9 to 14 , and details are not described herein again.
  • the communication device may be a first IAB node, and when the computer program instructions stored in the memory 2002 are executed, the processor 2001 is configured to control the receiving unit 1901 and the sending unit 1903 to perform the operations performed in the above embodiments , the processor 2001 is also used for the acquisition unit 1902 to perform the operations performed in the above embodiments, the input interface 2003 is used to perform the operations performed by the receiving unit 1901 in the above embodiments, and the output interface 2004 is used to perform the transmission unit 1903 in the above embodiments. action performed.
  • the foregoing first IAB node may also be used to execute various methods performed by the first IAB node in the foregoing method embodiments shown in FIG. 15 to FIG. 17 , and details are not described herein again.
  • FIG. 21 is a schematic structural diagram of another communication device disclosed in an embodiment of the present invention.
  • the communication device may include an input interface 2101 , a logic circuit 2102 and an output interface 2103 .
  • the input interface 2101 and the output interface 2103 are connected through the logic circuit 2102 .
  • the input interface 2101 is used for receiving information from other communication devices, and the output interface 2103 is used for outputting, scheduling or sending information to other communication devices.
  • the logic circuit 2102 is configured to perform operations other than the operations of the input interface 2101 and the output interface 2103, for example, to implement the functions implemented by the processor 2001 in the above-mentioned embodiment.
  • the communication device may be a RAN management network element, a first IAB host, or a first IAB node.
  • the more detailed description about the input interface 2101, the logic circuit 2102, and the output interface 2103 can be obtained directly by referring to the relevant descriptions of the RAN management network element, the first IAB host or the first IAB node in the above method embodiments, which will not be repeated here. .
  • the embodiment of the present invention also discloses a computer-readable storage medium, on which an instruction is stored, and when the instruction is executed, the method in the foregoing method embodiment is performed.
  • the embodiment of the present invention also discloses a computer program product including an instruction, when the instruction is executed, the method in the foregoing method embodiment is performed.
  • An embodiment of the present invention further discloses a communication system, which may include a RAN management network element, a first IAB host, a first IAB node, and the like.
  • a communication system which may include a RAN management network element, a first IAB host, a first IAB node, and the like.

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Abstract

本发明实施例公开一种通信方法、装置及系统，该方法应用于无线接入网RAN管理网元，RAN管理网元通过第一接口连接第一接入回传一体化IAB宿主，第一IAB宿主与第一IAB节点通过无线回传链路连接，该方法包括：确定第一IAB宿主和/或第一IAB节点的配置信息，该配置信息包括地址信息、路由信息和小区信息中的一种或多种；向第一IAB宿主发送该配置信息。本发明实施例，由于RAN管理网元可以同时对多个IAB宿主以及多个宿主所辖范围内的IAB节点的地址配置、路由配置和小区配置进行管理，可以避免多个IAB宿主之间交互和协调的信令开销，减少了信令开销，从而可以节约传输资源。

Description

一种通信方法、装置及系统
本申请要求于2021年04月30日提交中国专利局、申请号为202110486587.1、申请名称为“一种通信方法、装置及系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明实施例涉及通信技术领域，尤其涉及一种通信方法、装置及系统。
背景技术
第五代移动通信(5G)针对网络性能指标提出了更严苛的要求，如：容量指标提升1000倍、更广的覆盖要求、超高可靠性超低时延等。为了满足5G超高容量的要求，在热点区域，利用高频小站组网。然而，由于高频载波传播特性较差、受遮挡衰减严重、覆盖范围不广等问题，需要大量密集部署小站，以致需要大量光纤进行回传，而光纤的部署难度较大。此外，为了满足5G广覆盖的要求，需要在一些偏远地区提供网络覆盖，而光纤的部署难度较大。
为了解决上述问题，业界引入了接入链路(access link)和回传链路(backhaul link)均采用无线传输的接入回传一体化(integrated access and backhaul，IAB)技术。在IAB网络中，用户设备(user equipment，UE)可以通过无线接入链路接入IAB节点，IAB节点可以通过无线回传链路连接到IAB宿主(donor)节点。然而，IAB网络中的信令开销较大，以致造成了传输资源的浪费。
发明内容
本发明实施例公开了一种通信方法、装置及系统，用于节约传输传输资源。
第一方面公开一种通信方法，所述通信方法可以应用于无线接入网(radio access network，RAN)管理网元，也可以应用于RAN管理网元中的模块(例如，芯片)。所述RAN管理网元可以通过第一接口连接第一IAB宿主，所述第一IAB宿主与第一IAB节点通过无线回传链路连接。下面以应用于RAN管理网元为例进行描述。所述通信方法可以包括：确定所述第一IAB宿主和/或所述第一IAB节点的配置信息，所述配置信息包括地址信息、路由信息和小区信息中的一种或多种；向所述第一IAB宿主发送所述配置信息。
本发明实施例中，通过在RAN侧引入RAN管理网元，可以由RAN管理网元来管理地址配置、路由配置和小区配置。由于RAN管理网元可以同时对多个IAB宿主以及这多个IAB宿主所辖范围内的IAB节点的地址配置、路由配置和小区配置进行管理，可以保证在两个或两个以上的IAB宿主网络范围内，使得不同IAB节点的配置信息在相互之间通信的情况下不会产生冲突，这样在有跨宿主网络的业务传输需求情况下，可以避免多个IAB宿主网络之间的冲突，进而可以避免多个IAB宿主之间交互和协调的信令开销，减少了信令开销，从而可以节约传输资源。此外，由于RAN管理网元处于RAN侧，与IAB宿主之间传输信息所需时间较短，因此，可以减少信息传输时延，从而可以提高获取配置信息的时效性。
作为一种可能的实施方式，所述方法还包括：接收来自所述第一IAB宿主的请求消息；所述向所述第一IAB宿主发送所述配置信息包括：响应于所述请求消息，向所述第一IAB宿主发送所述配置信息。
本发明实施例中，RAN管理网元可以在接收到来自IAB宿主的用于请求配置信息的请求消息之后，才向IAB宿主发送配置信息，可以避免IAB宿主和/或处于IAB宿主所辖范围内的IAB节点不需要配置信息的情况下，RAN管理网元向IAB宿主发送配置信息，可以减少不必要信息的传输，从而可以节约传输资源。
作为一种可能的实施方式，所述地址信息包括回传适配协议(backhauladaptation protocol，BAP)层标识和/或网络互连协议(internet protocol，IP)地址。
作为一种可能的实施方式，所述路由信息包括适配层路由标识和/或路由映射表，所述路由映射表包括所述适配层路由标识和下一跳节点的标识。
作为一种可能的实施方式，所述小区信息包括小区的标识和小区的资源配置。
作为一种可能的实施方式，所述小区的资源配置包括小区的频点信息、小区的带宽信息、小区的上下行双工模式中的一种或多种。
作为一种可能的实施方式，所述请求消息包括所述第一IAB节点和/或所述第一IAB宿主所需地址的数量，以及所述第一IAB节点和/或所述第一IAB宿主的标识。
本发明实施例中，RAN管理网元可以根据请求消息包括的IAB节点和/或IAB宿主所需地址的数量，确定IAB节点和/或IAB宿主的地址信息，可以保证发送给IAB宿主的地址信息包括的地址的数量刚好够IAB节点和/或IAB宿主使用，既不会因为少而使IAB节点和/或IAB宿主不够用，又不会因为多而造成传输资源的浪费。
作为一种可能的实施方式，所述请求消息包括拓扑信息，所述拓扑信息包括所述第一IAB宿主和/或所述第一IAB节点与其它节点之间的连接关系。
本发明实施例中，RAN管理网元可以根据请求消息包括的拓扑信息，确定IAB节点和/或IAB宿主的路由信息，可以保证发送给IAB宿主的路由信息的准确性，进而可以保证数据的正确传输。
作为一种可能的实施方式，所述请求消息包括为所述第一IAB宿主和/或所述第一IAB节点服务的小区的标识。
本发明实施例中，RAN管理网元可以根据请求消息包括的小区的标识，为这些小区重新确定小区信息，可以避免确定不必要的小区信息，从而可以节约传输资源。重新确定的小区信息可以包括小区的资源配置。在一种情况下，重新确定的小区信息还可以包括小区的标识，以便IAB宿主和/或IAB节点可以根据小区的标识确定哪个资源配置是哪个小区的。在另一种情况下，重新确定的小区信息还可以包括小区的标识和重新确定的小区的标识，以便IAB宿主和/或IAB节点可以根据小区的标识和重新确定的小区的标识，确定哪个小区由旧名称更新为新名称。
作为一种可能的实施方式，所述请求消息为第一接口建立请求消息或IAB配置更新请求消息。
第二方面公开一种通信方法，所述通信方法可以应用于第一IAB宿主，也可以应用于第一IAB宿主中的模块(例如，芯片)。所述第一IAB宿主通过第一接口连接RAN管理网元，所述第一IAB宿主与第一IAB节点通过无线回传链路连接。下面以应用于第一IAB宿主为例进行描述。所述通信方法可以包括：通过所述第一接口接收来自所述RAN管理网元的所述第一IAB宿主和/或所述第一IAB节点的配置信息，所述配置信息包括地址信息、路由信息和小区信息中的一种或多种；获取所述地址信息、所述路由信息和所述小区信息中的一种或多种。
本发明实施例中，IAB宿主可以接收到来自管理IAB宿主的RAN管理网元的IAB宿主和/ 或IAB节点的配置信息，之后可以根据IAB宿主和/或IAB节点的配置信息对数据进行传输。可见，IAB宿主可以从RAN管理网元获取到IAB宿主所辖范围内的IAB节点的地址配置、路由配置和小区配置，不需要与其它IAB宿主进行交互和协调，因此，在有跨宿主网络的业务传输需求情况下，可以避免多个IAB宿主之间交互和协调的信令开销，减少了信令开销，从而可以节约传输资源。此外，由于RAN管理网元处于RAN侧，IAB宿主与RAN管理网元之间传输信息所需时间较短，因此，可以减少信息传输时延，从而可以提高获取配置信息的时效性。
作为一种可能的实施方式，所述通信方法还可以包括：向所述RAN管理网元发送请求消息，所述请求消息用于请求所述配置信息。
本发明实施例中，IAB宿主可以向RAN管理网元发送用于请求配置信息的请求消息，以便RAN管理网元可以响应于该请求消息，向IAB宿主发送配置信息，可以避免IAB宿主和/或处于IAB宿主所辖范围内的IAB节点不需要配置信息的情况下，RAN管理网元向IAB宿主发送配置信息，可以减少不必要信息的传输，从而可以节约传输资源。
作为一种可能的实施方式，所述通信方法还可以包括：向所述第一IAB节点发送所述第一IAB节点的配置信息。
本发明实施例中，IAB宿主接收到来自RAN管理网元的IAB节点的配置信息之后，可以向IAB节点发送IAB节点的配置信息，以便IAB节点可以根据IAB节点的配置信息正确传输数据。
作为一种可能的实施方式，所述地址信息包括BAP层标识和/或IP地址。
作为一种可能的实施方式，所述路由信息包括适配层路由标识和/或路由映射表，所述路由映射表包括所述适配层路由标识和下一跳节点的标识。
作为一种可能的实施方式，所述小区信息包括小区的标识和小区的资源配置。
作为一种可能的实施方式，所述小区的资源配置包括小区的频点信息、小区的带宽信息、小区的上下行双工模式中的一种或多种。
作为一种可能的实施方式，所述请求消息包括所述第一IAB节点和/或所述第一IAB宿主所需地址的数量，以及所述第一IAB节点和/或所述第一IAB宿主的标识。
本发明实施例中，IAB宿主可以向RAN管理网元发送IAB节点和/或IAB宿主所需地址的数量，以便RAN管理网元可以根据IAB节点和/或IAB宿主所需地址的数量，确定IAB节点和/或IAB宿主的地址信息，可以保证发送给IAB宿主的地址信息包括的地址的数量刚好够IAB节点和/或IAB宿主使用，既不会因为少而使IAB节点和/或IAB宿主不够用，又不会因为多而造成传输资源的浪费。
作为一种可能的实施方式，所述请求消息包括拓扑信息，所述拓扑信息包括所述第一IAB宿主和/或所述第一IAB节点与其它节点之间的连接关系。
本发明实施例中，IAB宿主可以向RAN管理网元发送拓扑信息，以便RAN管理网元可以根据拓扑信息，确定IAB节点和/或IAB宿主的路由信息，可以保证发送给IAB宿主的路由信息的准确性，进而可以保证数据的正确传输。
作为一种可能的实施方式，所述请求消息包括为所述第一IAB宿主和/或所述第一IAB节点服务的小区的标识。
本发明实施例中，IAB宿主可以向RAN管理网元发送需要更新小区信息的小区的标识，以便RAN管理网元可以根据小区的标识，为这些小区重新确定小区信息，可以避免确定不必要的小区信息，从而可以节约传输资源。重新确定的小区信息可以包括小区的资源配置。在一种情况下，重新确定的小区信息还可以包括小区的标识，以便IAB宿主和/或IAB节点可以根据小区的标识确定哪个资源配置是哪个小区的。在另一种情况下，重新确定的小区信息还 可以包括小区的标识和重新确定的小区的标识，以便IAB宿主和/或IAB节点可以根据小区的标识和重新确定的小区的标识，确定哪个小区由旧名称更新为新名称。
作为一种可能的实施方式，所述请求消息为第一接口建立请求消息或IAB配置更新请求消息。
第三方面公开一种通信方法，所述通信方法可以应用于RAN管理网元，也可以应用于RAN管理网元中的模块(例如，芯片)。所述RAN管理网元通过第一接口连接第一IAB宿主，所述RAN管理网元通过第二接口连接第一IAB节点，所述第一IAB宿主与所述第一IAB节点通过无线回传链路连接。下面以应用于RAN管理网元为例进行描述。所述通信方法可以包括：确定所述第一IAB节点的配置信息，所述配置信息包括地址信息、路由信息和小区信息中的一种或多种；通过所述第二接口向所述第一IAB节点发送所述配置信息。
本发明实施例中，通过在RAN侧引入RAN管理网元，可以由RAN管理网元来管理地址配置、路由配置和小区配置。由于RAN管理网元可以同时对多个IAB宿主所辖范围内的IAB节点的地址配置、路由配置和小区配置进行管理，可以在两个或两个以上的IAB宿主网络范围内，使得不同IAB节点的配置信息在相互之间通信的情况下不会产生冲突，这样在有跨宿主网络的业务传输需求情况下，可以避免多个IAB宿主网络之间的冲突，进而在有跨宿主网络的业务传输需求情况下，可以避免多个IAB宿主之间交互和协调的信令开销，减少了信令开销，从而可以节约传输资源。此外，由于IAB节点与RAN管理网元之间可以直接进行通信，IAB节点的配置信息可以不经过IAB宿主，可以由RAN管理网元直接发送给IAB节点，可以进一步减少信令的开销，从而可以进一步节约传输资源。进一步地，由于RAN管理网元处于RAN侧，与IAB节点之间传输信息所需时间较短，因此，可以减少信息传输时延，从而可以提高获取配置信息的时效性。
作为一种可能的实施方式，所述通信方法还可以包括：通过所述第一接口向所述第一IAB宿主发送所述配置信息。
本发明实施例中，RAN管理网元需要将IAB节点的配置信息发送给IAB宿主，以便IAB宿主可以根据IAB节点的配置信息对IAB节点进行管理。
作为一种可能的实施方式，所述通信方法还可以包括：确定所述第一IAB宿主的配置信息；通过所述第一接口向所述第一IAB宿主发送所述第一IAB宿主的配置信息。
本发明实施例中，由于RAN管理网元可以同时对多个IAB宿主的地址配置、路由配置和小区配置进行管理，可以保证不同IAB宿主的配置信息不同，可以避免多个IAB宿主网络之间的冲突，进而可以避免多个IAB宿主之间交互和协调的信令开销，减少了信令开销，从而可以节约传输资源。
作为一种可能的实施方式，所述地址信息包括BAP层标识和/或IP地址。
作为一种可能的实施方式，所述路由信息包括适配层路由标识和/或路由映射表，所述路由映射表包括所述适配层路由标识和下一跳节点的标识。
作为一种可能的实施方式，所述小区信息包括小区的标识和小区的资源配置。
作为一种可能的实施方式，所述小区的资源配置包括小区的频点信息、小区的带宽信息、小区的上下行双工模式中的一种或多种。
作为一种可能的实施方式，所述通信方法还可以包括：接收来自所述第一IAB宿主的第一请求消息；所述通过所述第一接口向所述第一IAB宿主发送所述第一IAB宿主的配置信息包括：响应于所述第一请求消息，通过所述第一接口向所述第一IAB宿主发送所述第一IAB宿主 的配置信息。
本发明实施例中，RAN管理网元可以在接收到来自IAB宿主的用于请求IAB宿主的配置信息的请求消息之后，才向IAB宿主发送IAB宿主的配置信息，可以避免IAB宿主不需要配置信息的情况下，RAN管理网元向IAB宿主发送IAB宿主的配置信息，可以减少不必要信息的传输，从而可以节约传输资源。
作为一种可能的实施方式，所述第一请求消息包括所述第一IAB宿主所需地址的数量以及所述第一IAB宿主的标识。
本发明实施例中，RAN管理网元可以根据请求消息包括的IAB宿主所需地址的数量，确定IAB宿主的地址信息，可以保证发送给IAB宿主的地址信息包括的地址的数量刚好够IAB宿主使用，既不会因为少而使IAB宿主不够用，又不会因为多而造成传输资源的浪费。
作为一种可能的实施方式，所述第一请求消息包括第一拓扑信息，所述第一拓扑信息包括所述第一IAB宿主与IAB节点之间的连接关系。
本发明实施例中，RAN管理网元可以根据请求消息包括的拓扑信息，确定IAB宿主的路由信息，可以保证发送给IAB宿主的路由信息的准确性，进而可以保证数据的正确传输。
作为一种可能的实施方式，所述第一请求消息包括为所述第一IAB宿主服务的小区的标识。
本发明实施例中，RAN管理网元可以根据请求消息包括的小区的标识，为这些小区重新确定小区信息，可以避免确定不必要的小区信息，从而可以节约传输资源。重新确定的小区信息可以包括小区的资源配置。在一种情况下，重新确定的小区信息还可以包括小区的标识，以便IAB宿主可以根据小区的标识确定哪个资源配置是哪个小区的。在另一种情况下，重新确定的小区信息还可以包括小区的标识和重新确定的小区的标识，以便IAB宿主可以根据小区的标识和重新确定的小区的标识，确定哪个小区由旧名称更新为新名称。
作为一种可能的实施方式，所述第一请求消息为第一接口建立请求消息或IAB配置更新请求消息。
作为一种可能的实施方式，所述通信方法还可以包括：接收来自所述第一IAB节点的第二请求消息；所述通过所述第二接口向所述第一IAB节点发送所述配置信息包括：响应于所述第二请求消息，通过所述第二接口向所述第一IAB节点发送所述配置信息。
本发明实施例中，RAN管理网元可以在接收到来自IAB节点的用于请求IAB节点的配置信息的请求消息之后，才向IAB节点发送IAB节点的配置信息，可以避免IAB节点不需要配置信息的情况下，RAN管理网元向IAB节点发送配置信息，可以减少不必要信息的传输，从而可以节约传输资源。
作为一种可能的实施方式，所述第二请求消息包括所述第一IAB节点所需地址的数量以及所述第一IAB节点的标识。
本发明实施例中，RAN管理网元可以根据请求消息包括的IAB节点所需地址的数量，确定IAB节点的地址信息，可以保证发送给IAB节点的地址信息包括的地址的数量刚好够IAB节点使用，既不会因为少而使IAB节点不够用，又不会因为多而造成传输资源的浪费。
作为一种可能的实施方式，所述第二请求消息包括第二拓扑信息，所述第二拓扑信息包括所述第一IAB节点与所述第一IAB节点的父节点和/或子节点之间的连接关系。
本发明实施例中，RAN管理网元可以根据请求消息包括的拓扑信息，确定IAB节点的路由信息，可以保证发送给IAB节点的路由信息的准确性，进而可以保证数据的正确传输。
作为一种可能的实施方式，所述第二请求消息包括为所述第一IAB节点服务的小区的标 识。
本发明实施例中，RAN管理网元可以根据请求消息包括的小区的标识，为这些小区重新确定小区信息，可以避免确定不必要的小区信息，从而可以节约传输资源。重新确定的小区信息可以包括小区的资源配置。在一种情况下，重新确定的小区信息还可以包括小区的标识，以便IAB节点可以根据小区的标识确定哪个资源配置是哪个小区的。在另一种情况下，重新确定的小区信息还可以包括小区的标识和重新确定的小区的标识，以便IAB节点可以根据小区的标识和重新确定的小区的标识，确定哪个小区由旧名称更新为新名称。作为一种可能的实施方式，所述第二请求消息为第二接口建立请求消息或IAB配置更新请求消息。
第四方面公开一种通信方法，所述通信方法可以应用于第一IAB节点，也可以应用于第一IAB节点中的模块(例如，芯片)。所述第一IAB节点与第一IAB宿主通过无线回传链路连接，所述第一IAB节点通过第二接口连接RAN管理网元。下面以应用于第一IAB节点为例进行描述。所述通信方法可以包括：通过所述第二接口接收来自所述RAN管理网元的所述第一IAB节点的配置信息，所述配置信息包括地址信息、路由信息和小区信息中的一种或多种；获取所述地址信息、所述路由信息和所述小区信息中的一种或多种。
本发明实施例中，IAB节点可以接收到来自管理IAB宿主的RAN管理网元的IAB节点的配置信息，之后可以根据IAB节点的配置信息对数据进行传输。可见，IAB节点可以从RAN管理网元获取到IAB节点的地址配置、路由配置和小区配置，可以在IAB节点有跨宿主网络的业务传输需求情况下，避免管理IAB节点的IAB宿主与其它IAB宿主进行交互和协调，因此，可以避免多个IAB宿主之间交互和协调的信令开销，减少了信令开销，从而可以节约传输资源。此外，由于RAN管理网元处于RAN侧，IAB节点与RAN管理网元之间传输信息所需时间较短，因此，可以减少信息传输时延，从而可以提高获取配置信息的时效性。
作为一种可能的实施方式，所述地址信息包括BAP层标识和/或IP地址。
作为一种可能的实施方式，所述路由信息包括适配层路由标识和/或路由映射表，所述路由映射表包括所述适配层路由标识和下一跳节点的标识。
作为一种可能的实施方式，所述小区信息包括小区的标识和小区的资源配置。
作为一种可能的实施方式，所述小区的资源配置包括小区的频点信息、小区的带宽信息、小区的上下行双工模式中的一种或多种。
作为一种可能的实施方式，所述通信方法还可以包括：通过所述第二接口向所述RAN管理网元发送第二请求消息，所述第二请求消息用于请求所述配置信息。
本发明实施例中，IAB节点可以向RAN管理网元发送用于请求配置信息的请求消息，以便RAN管理网元可以响应于该请求消息，向IAB节点发送配置信息，可以避免IAB节点不需要配置信息的情况下，RAN管理网元向IAB节点发送配置信息，可以减少不必要信息的传输，从而可以节约传输资源。
作为一种可能的实施方式，所述第二请求消息包括所述第一IAB节点所需地址的数量以及所述第一IAB节点的标识。
本发明实施例中，IAB节点可以向RAN管理网元发送IAB节点所需地址的数量，以便RAN管理网元可以根据IAB节点所需地址的数量，确定IAB节点的地址信息，可以保证发送给IAB节点的地址信息包括的地址的数量刚好够IAB节点使用，既不会因为少而使IAB节点不够用，又不会因为多而造成传输资源的浪费。
作为一种可能的实施方式，所述第二请求消息包括第二拓扑信息，所述第二拓扑信息包 括所述第一IAB节点与所述第一IAB节点的父节点和/或子节点之间的连接关系。
本发明实施例中，IAB节点可以向RAN管理网元发送拓扑信息，以便RAN管理网元可以根据拓扑信息，确定IAB节点的路由信息，可以保证发送给IAB节点的路由信息的准确性，进而可以保证数据的正确传输。
作为一种可能的实施方式，所述第二请求消息包括为所述第一IAB节点服务的小区的标识。
本发明实施例中，IAB节点可以向RAN管理网元发送需要更新小区信息的小区的标识，以便RAN管理网元可以根据小区的标识，为这些小区重新确定小区信息，可以避免确定不必要的小区信息，从而可以节约传输资源。重新确定的小区信息可以包括小区的资源配置。在一种情况下，重新确定的小区信息还可以包括小区的标识，以便IAB节点可以根据小区的标识确定哪个资源配置是哪个小区的。在另一种情况下，重新确定的小区信息还可以包括小区的标识和重新确定的小区的标识，以便IAB节点可以根据小区的标识和重新确定的小区的标识，确定哪个小区由旧名称更新为新名称。
作为一种可能的实施方式，所述第二请求消息为第二接口建立请求消息或IAB配置更新请求消息。
第五方面公开一种通信装置。所述通信装置RAN管理网元，所述RAN管理网元可以通过第一接口连接第一IAB宿主，所述第一IAB宿主与第一IAB节点通过无线回传链路连接。所述通信装置可以包括：确定单元，用于确定所述第一IAB宿主和/或所述第一IAB节点的配置信息，所述配置信息包括地址信息、路由信息和小区信息中的一种或多种；发送单元，用于向所述第一IAB宿主发送所述配置信息。
作为一种可能的实施方式，所述通信装置还可以包括：接收单元，用于接收来自所述第一IAB宿主的请求消息；所述发送单元，具体用于响应于所述请求消息，向所述第一IAB宿主发送所述配置信息。
作为一种可能的实施方式，所述地址信息包括BAP层标识和/或IP地址。
作为一种可能的实施方式，所述路由信息包括适配层路由标识和/或路由映射表，所述路由映射表包括所述适配层路由标识和下一跳节点的标识。
作为一种可能的实施方式，所述小区信息包括小区的标识和小区的资源配置。
作为一种可能的实施方式，所述小区的资源配置包括小区的频点信息、小区的带宽信息、小区的上下行双工模式中的一种或多种。
作为一种可能的实施方式，所述请求消息包括所述第一IAB节点和/或所述第一IAB宿主所需地址的数量，以及所述第一IAB节点和/或所述第一IAB宿主的标识。
作为一种可能的实施方式，所述请求消息包括拓扑信息，所述拓扑信息包括所述第一IAB宿主和/或所述第一IAB节点与其它节点之间的连接关系。
作为一种可能的实施方式，所述请求消息包括为所述第一IAB宿主和/或所述第一IAB节点服务的小区的标识。
作为一种可能的实施方式，所述请求消息为第一接口建立请求消息或IAB配置更新请求消息。
第六方面公开一种通信装置。所述通信装置为第一IAB宿主，所述第一IAB宿主通过第一接口连接RAN管理网元，所述第一IAB宿主与第一IAB节点通过无线回传链路连接。所述通信 装置可以包括：接收单元，用于通过所述第一接口接收来自所述RAN管理网元的所述第一IAB宿主和/或所述第一IAB节点的配置信息，所述配置信息包括地址信息、路由信息和小区信息中的一种或多种；获取单元，用于获取所述地址信息、所述路由信息和所述小区信息中的一种或多种。
作为一种可能的实施方式，所述通信装置还可以包括：第一发送单元，用于向所述RAN管理网元发送请求消息，所述请求消息用于请求所述配置信息。
作为一种可能的实施方式，所述通信装置还可以包括：第二发送单元，用于向所述第一IAB节点发送所述第一IAB节点的配置信息。
作为一种可能的实施方式，所述地址信息包括BAP层标识和/或IP地址。
作为一种可能的实施方式，所述路由信息包括适配层路由标识和/或路由映射表，所述路由映射表包括所述适配层路由标识和下一跳节点的标识。
作为一种可能的实施方式，所述小区信息包括小区的标识和小区的资源配置。
作为一种可能的实施方式，所述小区的资源配置包括小区的频点信息、小区的带宽信息、小区的上下行双工模式中的一种或多种。
作为一种可能的实施方式，所述请求消息包括所述第一IAB节点和/或所述第一IAB宿主所需地址的数量，以及所述第一IAB节点和/或所述第一IAB宿主的标识。
作为一种可能的实施方式，所述请求消息包括拓扑信息，所述拓扑信息包括所述第一IAB宿主和/或所述第一IAB节点与其它节点之间的连接关系。
作为一种可能的实施方式，所述请求消息包括为所述第一IAB宿主和/或所述第一IAB节点服务的小区的标识。
作为一种可能的实施方式，所述请求消息为第一接口建立请求消息或IAB配置更新请求消息。
第七方面公开一种通信装置。所述通信装置为RAN管理网元，所述RAN管理网元通过第一接口连接第一IAB宿主，所述RAN管理网元通过第二接口连接第一IAB节点，所述第一IAB宿主与所述第一IAB节点通过无线回传链路连接。所述通信装置可以包括：确定单元，用于确定所述第一IAB节点的配置信息，所述配置信息包括地址信息、路由信息和小区信息中的一种或多种；发送单元，用于通过所述第二接口向所述第一IAB节点发送所述配置信息。
作为一种可能的实施方式，所述发送单元，还用于通过所述第一接口向所述第一IAB宿主发送所述配置信息。
作为一种可能的实施方式，所述确定单元，还用于确定所述第一IAB宿主的配置信息；所述发送单元，还用于通过所述第一接口向所述第一IAB宿主发送所述第一IAB宿主的配置信息。
作为一种可能的实施方式，所述地址信息包括BAP层标识和/或IP地址。
作为一种可能的实施方式，所述路由信息包括适配层路由标识和/或路由映射表，所述路由映射表包括所述适配层路由标识和下一跳节点的标识。
作为一种可能的实施方式，所述小区信息包括小区的标识和小区的资源配置。
作为一种可能的实施方式，所述小区的资源配置包括小区的频点信息、小区的带宽信息、小区的上下行双工模式中的一种或多种。
作为一种可能的实施方式，所述通信装置还可以包括：第一接收单元，用于接收来自所述第一IAB宿主的第一请求消息；所述发送单元通过所述第一接口向所述第一IAB宿主发送所 述第一IAB宿主的配置信息包括：响应于所述第一请求消息，通过所述第一接口向所述第一IAB宿主发送所述第一IAB宿主的配置信息。
作为一种可能的实施方式，所述第一请求消息包括所述第一IAB宿主所需地址的数量以及所述第一IAB宿主的标识。
作为一种可能的实施方式，所述第一请求消息包括第一拓扑信息，所述第一拓扑信息包括所述第一IAB宿主与IAB节点之间的连接关系。
作为一种可能的实施方式，所述第一请求消息包括为所述第一IAB宿主服务的小区的标识。
作为一种可能的实施方式，所述第一请求消息为第一接口建立请求消息或IAB配置更新请求消息。
作为一种可能的实施方式，所述通信装置还可以包括：第二接收单元，用于接收来自所述第一IAB节点的第二请求消息；所述发送单元通过所述第二接口向所述第一IAB节点发送所述配置信息包括：响应于所述第二请求消息，通过所述第二接口向所述第一IAB节点发送所述配置信息。
作为一种可能的实施方式，所述第二请求消息包括所述第一IAB节点所需地址的数量以及所述第一IAB节点的标识。
作为一种可能的实施方式，所述第二请求消息包括第二拓扑信息，所述第二拓扑信息包括所述第一IAB节点与所述第一IAB节点的父节点和/或子节点之间的连接关系。
作为一种可能的实施方式，所述第二请求消息包括为所述第一IAB节点服务的小区的标识。
作为一种可能的实施方式，所述第二请求消息为第二接口建立请求消息或IAB配置更新请求消息。
第八方面公开一种通信装置。所述通信装置为第一IAB节点，所述第一IAB节点与第一IAB宿主通过无线回传链路连接，所述第一IAB节点通过第二接口连接RAN管理网元。所述通信装置可以包括：接收单元，用于通过所述第二接口接收来自所述RAN管理网元的所述第一IAB节点的配置信息，所述配置信息包括地址信息、路由信息和小区信息中的一种或多种；获取单元，用于获取所述地址信息、所述路由信息和所述小区信息中的一种或多种。
作为一种可能的实施方式，所述地址信息包括BAP层标识和/或IP地址。
作为一种可能的实施方式，所述路由信息包括适配层路由标识和/或路由映射表，所述路由映射表包括所述适配层路由标识和下一跳节点的标识。
作为一种可能的实施方式，所述小区信息包括小区的标识和小区的资源配置。
作为一种可能的实施方式，所述小区的资源配置包括小区的频点信息、小区的带宽信息、小区的上下行双工模式中的一种或多种。
作为一种可能的实施方式，所述通信装置还可以包括：发送单元，用于通过所述第二接口向所述RAN管理网元发送第二请求消息，所述第二请求消息用于请求所述配置信息。
作为一种可能的实施方式，所述第二请求消息包括所述第一IAB节点所需地址的数量以及所述第一IAB节点的标识。
作为一种可能的实施方式，所述第二请求消息包括第二拓扑信息，所述第二拓扑信息包括所述第一IAB节点与所述第一IAB节点的父节点和/或子节点之间的连接关系。
作为一种可能的实施方式，所述第二请求消息包括为所述第一IAB节点服务的小区的标 识。
作为一种可能的实施方式，所述第二请求消息为第二接口建立请求消息或IAB配置更新请求消息。
第九方面公开一种通信装置。该通信装置可以包括处理器、存储器、输入接口和输出接口，所述输入接口用于接收来自所述通信装置之外的其它通信装置的信息，所述输出接口用于向所述通信装置之外的其它通信装置输出信息，当所述处理器执行所述存储器存储的计算机程序时，使得所述处理器执行第一方面或第一方面的任一实施方式公开的通信方法。
第十方面公开一种通信装置。该通信装置可以包括处理器、存储器、输入接口和输出接口，所述输入接口用于接收来自所述通信装置之外的其它通信装置的信息，所述输出接口用于向所述通信装置之外的其它通信装置输出信息，当所述处理器执行所述存储器存储的计算机程序时，使得所述处理器执行第二方面或第二方面的任一实施方式公开的通信方法。
第十一方面公开一种通信装置。该通信装置可以包括处理器、存储器、输入接口和输出接口，所述输入接口用于接收来自所述通信装置之外的其它通信装置的信息，所述输出接口用于向所述通信装置之外的其它通信装置输出信息，当所述处理器执行所述存储器存储的计算机程序时，使得所述处理器执行第三方面或第三方面的任一实施方式公开的通信方法。
第十二方面公开一种通信装置。该通信装置可以包括处理器、存储器、输入接口和输出接口，所述输入接口用于接收来自所述通信装置之外的其它通信装置的信息，所述输出接口用于向所述通信装置之外的其它通信装置输出信息，当所述处理器执行所述存储器存储的计算机程序时，使得所述处理器执行第四方面或第四方面的任一实施方式公开的通信方法。
第十三方面公开一种通信系统，该通信系统包括第九方面的通信装置和第十方面的通信装置，或者该通信系统包括第十一方面的通信装置和第十二方面的通信装置。
第十四方面公开一种计算机可读存储介质，该计算机可读存储介质上存储有计算机程序或计算机指令，当该计算机程序或计算机指令运行时，实现如上述各方面公开的通信方法。
第十五方面公开一种芯片，包括处理器，用于执行存储器中存储的程序，当程序被执行时，使得芯片执行上面的方法。
作为一种可能的实施方式，存储器位于芯片之外。
第十六方面公开一种计算机程序产品，该计算机程序产品包括计算机程序代码，当该计算机程序代码被运行时，使得上述通信方法被执行。
附图说明
图1是本发明实施例公开的一种IAB独立组网的示意图；
图2是本发明实施例公开的一种IAB非独立组网的示意图；
图3是本发明实施例公开的一种用户面协议的示意图；
图4是本发明实施例公开的一种控制面协议的示意图；
图5是本发明实施例公开的一种IAB节点与OAM之间连接的示意图；
图6是本发明实施例公开的一种IAB网络的应用场景示意图；
图7是本发明实施例公开的一种网络架构示意图；
图8是本发明实施例公开的另一种网络架构示意图；
图9是本发明实施例公开的一种通信方法的流程示意图；
图10是本发明实施例公开的一种RAN管理网元与第一IAB宿主之间第一接口的控制面 协议栈的示意图；
图11是本发明实施例公开的一种IAB宿主获取地址信息的示意图；
图12是本发明实施例公开的一种IAB宿主获取路由信息的示意图；
图13是本发明实施例公开的一种IAB宿主获取小区信息的示意图；
图14是本发明实施例公开的另一种通信方法的流程示意图；
图15是本发明实施例公开的又一种通信方法的流程示意图；
图16是本发明实施例公开的又一种通信方法的流程示意图；
图17是本发明实施例公开的又一种通信方法的流程示意图；
图18是本发明实施例公开的一种通信装置的结构示意图；
图19是本发明实施例公开的另一种通信装置的结构示意图；
图20是本发明实施例公开的又一种通信装置的结构示意图；
图21是本发明实施例公开的又一种通信装置的结构示意图。
具体实施方式
本发明实施例公开了一种通信方法、装置及系统，用于节约传输资源。以下分别进行详细说明。
为了更好地理解本发明实施例，下面先对本发明实施例的相关技术进行描述。
相较于第四代移动通信(the 4th generation mobile communication technology，4G)系统，第五代移动通信(5G)系统针对网络各项性能指标都提出了更严苛的要求。例如，容量指标提升1000倍、更广的覆盖、超高可靠超低时延等需求。一方面，考虑到高频载波频率资源丰富，在热点区域，为了满足5G超高容量需求，利用高频小站组网愈发流行。由于高频载波传播特性较差、受遮挡衰减严重，覆盖范围不广，因此需要大量密集部署小站。相应地，为这些大量密集部署的小站提供光纤回传的代价高、施工难度大，因此，需要经济便捷的回传方案。另一方面，从广覆盖需求的角度出发，在一些偏远地区提供网络覆盖，光纤的部署难度大、成本高，也需要设计灵活便利的接入和回传方案。为了解决上述问题，业界引入了接入链路和回传链路均采用无线传输的IAB技术。
请参阅图1，图1是本发明实施例公开的一种IAB独立组网的示意图。如图1所示，IAB网络可以包括用户设备(user equipment，UE)、IAB节点(node)和IAB宿主(donor)。IAB节点也可以称为中继节点(relay node，RN)，可以为UE提供无线接入服务。IAB节点可以包括移动终端(mobile termination，MT)部分和分布式单元(distributed unit，DU)部分。当IAB节点面向其父节点时，IAB节点可以作为终端设备，即MT的角色；当IAB节点面向其子节点时，其被视为网络设备，即作为DU的角色。IAB节点的MT部分，具有UE的部分或全部功能。一个IAB节点的子节点可能是另一IAB节点，也可能是UE。IAB宿主也可称为宿主节点(donor node)或宿主基站(donor gNodeB，DgNB)。宿主基站可以是一个具有完整基站功能的接入网设备，也可以是集中式单元(centralized unit，CU)和DU分离形态的接入网设备。为便于表述，可以将IAB宿主的CU简称为IAB宿主CU或CU，可以将IAB宿主的DU简称为IAB宿主DU。IAB宿主CU还有可能是控制面(control plane，CP)和用户面(user plane，UP)分离的形态。例如，CU可以包括一个CU-CP和一个或多个CU-UP。UE的业务数据可以由IAB节点通过无线回传链路连发送到IAB宿主。IAB宿主可以连接到为UE服务的核心网网元，并为IAB节点提供无线回传功能。
在5G当前的标准中，考虑到高频段的覆盖范围小，为了保障网络的覆盖性能，在IAB网络中可以采用多跳组网。此外，考虑到业务传输可靠性需求，可以使IAB节点支持双连接(dual connectivity，DC)或者多连接(multi-connectivity)，以应对回传链路可能发生的异常情况，如链路的中断或阻塞(blockage)及负载波动等，以便可以提高传输的可靠性。因此，IAB网络可以支持多跳组网，还可以支持多连接组网。在由IAB节点服务的UE和IAB宿主之间，存在至少一条由多段链路组成的传输路径。一条传输路径可以包含多个节点。例如，一条传输路径可以包括UE、一个或多个IAB节点、IAB宿主。当IAB宿主的CU和DU分离时，一条传输路径还可以包含IAB宿主DU部分和IAB宿主CU部分。
每个IAB节点将为其提供接入和回传服务的相邻节点视为父节点，相应地，每个IAB节点可视为其父节点的子节点。例如，图1中IAB节点1的父节点为IAB宿主，IAB节点1为IAB节点2和IAB节点3的父节点，IAB节点2和IAB节点3均为IAB节点4的父节点，IAB节点5的父节点为IAB节点2。
UE的上行数据包可以经一个或多个IAB节点传输至IAB宿主后，再由IAB宿主发送至移动网关设备。例如，5G核心网中的用户面功能(user plane function，UPF)网元。UE的下行数据包将由IAB宿主从移动网关设备处接收后，再通过IAB节点发送至UE。图1中的为IAB独立(standalone，SA)组网场景，IAB节点和UE均仅通过新无线(new radio，NR)制式的空口与网络建立连接。
应理解，图1所示的IAB独立组网场景仅仅是示例性的，在多跳和多连接结合的IAB场景中，还有更多其他的可能性。例如，图1中的IAB宿主和另一IAB宿主下的IAB节点组成双连接为UE服务，即UE支持双连接，其中一个连接1直接接入IAB宿主DU服务的小区，另一个连接2与IAB节点X建立连接，该IAB节点X所连接到的IAB宿主不同于UE连接1所对应的IAB宿主。在此不再一一列举。
IAB网络除了支持SA组网之外，还支持非独立(non-standalone,NSA)组网。请参阅图2，图2是本发明实施例公开的一种IAB非独立组网的示意图。如图2所示，IAB节点支持4G和5G网络双连接，即演进通用移动通信系统(evolved universal mobile telecommunications system，E-UTRAN)NR双连接(E-UTRAN NR dual connectivity，EN-DC)。长期演进(long term evolution，LTE)的基站为主基站(master eNB，MeNB)，为UE提供LTE的空口(即LTE Uu口)连接，并与4G核心网(即演进型分组核心网(evolved packet core，EPC))通过S1接口进行用户面和控制面传输。IAB宿主为辅基站，为IAB节点提供NR的空口(即NR Uu口)连接，并与核心网通过S1-U接口进行用户面传输。类似地，UE也支持EN-DC，UE可以通过LTE Uu接口连接到MeNB，可以通过NR Uu接口连接到辅基站。
需要说明的是，图2所示的IAB非独立组网仅为组网示例，IAB网络的NSA场景也同样支持多跳IAB组网。例如，图2中的UE可以为另一个IAB节点，即IAB节点可以通过多跳无线回传链路连接到IAB宿主基站。本发明中的IAB非独立组网场景也可以被称为IAB的EN-DC组网场景。
当前对IAB网络的讨论中，确定在无线回传链路引入一个新的协议层，即BAP层。BAP层位于无线链路控制(radio link control，RLC)层之上，可用于实现数据包在无线回传链路的路由，以及承载映射等功能。
在IAB节点(即IAB节点的DU部分)和IAB宿主(或者IAB宿主CU)之间，需要建立F1接口。F1接口也可以被称为F1*接口，本发明中可以统一称为F1接口，但对名称并不做限定。F1接口支持用户面协议(F1-U)和控制面协议(F1-C)。请参阅图3，图3是本发明实施例公 开的一种用户面协议的示意图。如图3所示，F1接口的用户面协议可以包括通用分组无线服务(general packet radio service，GPRS)隧道协议用户面(GPRS tunnelling protocol user plane，GTP-U)、用户数据报协议(user datagram protocol，UDP)、IP等协议层中的一个或多个。IAB节点和IAB宿主DU可以包括BAP、RLC层协议、媒体介入控制(media access control，MAC)层协议和物理(physical，PHY)层协议。IAB宿主DU和IAB宿主CU-UP还可以包括L2层协议和L1层协议。请参阅图4，图4是本发明实施例公开的一种控制面协议的示意图。如图4所示，F1接口的控制面协议可以包括F1应用协议(F1 application protocol，F1AP)、流控传输协议(stream control transport protocol，SCTP)、IP等协议层中的一个或者多个。其它可以参考图3的描述。IAB节点之间以及IAB节点与IAB宿主DU之间可以通过回传(back haul，BH)RLC信道(channel)进行通信。IAB宿主DU与IAB宿主CU-UP/CP之间可以通过宿主内F1(intra-donor F1)进行通信。IAB节点与IAB宿主CU-UP之间可以通过F1-U接口进行通信。IAB节点与IAB宿主CU-UP之间可以通过F1-C接口进行通信。
应理解，L1层和L2层通常是指有线通信的协议层。例如，L1层可以包括物理层，L2层可以包括数据链路层，L2层可以进一步包括：MAC层，逻辑链接链路控制层(logical link control layer，LLC)、点对点协议层(point to point protocol，PPP)、以太网(Ethernet)技术的链路层等中的一种或多种。上述只是对L1层和L2层包含的具体协议层的举例，并不对L1层和L2层包含的具体协议层构成限定。
可以通过F1接口的控制面对IAB节点和IAB宿主之间进行接口管理、对IAB节点的DU部分进行管理以及对UE上下文相关的配置等。可以通过F1接口的用户面对IAB节点和IAB宿主之间进行用户面数据的传输以及对下行传输状态进行反馈等功能。
目前，IAB网络中的拓扑管理功能是在IAB宿主CU-CP中。一个IAB宿主只有一个CU-CP，该CU-CP只能进行IAB宿主内的拓扑管理，该拓扑管理包含节点的BAP层标识分配、路由路径的BAP路径(path)标识(identifier，ID)分配等。而IAB-DU小区的管理和配置主要由操作管理维护(operation administration and maintenance，OAM)负责。请参阅图5，图5是本发明实施例公开的一种IAB节点与OAM之间连接的示意图。如图5所示，IAB节点可以通过两种不同的方式连接到OAM服务器(server)。一种是通过BH IP的方式直接将OAM业务相应的IP包，在BH链路上作为一种非F1接口业务传输。另一种方式是通过IAB节点的MT部分建立的协议数据单元(protocol data unit，PDU)会话(session)来承载同IAB节点的DU部分的OAM业务，这种方式需要经由与IAB节点的MT部分连接的核心网网元。此外，IAB宿主CU(或IAB宿主CU-CP)也可以参与IAB-DU小区资源的配置。例如，IAB宿主CU可以对IAB-DU的时分双工(time division duplexing，TDD)模式的小区进行时隙(slot)/符号(symbol)粒度的上下行配置，以及进行可用属性配置等。上下行配置可以包括下行(downlink)配置、上行(uplink)配置和灵活的(flexible)配置。可用属性配置可以为硬(hard)，也可以为软(soft)，还可以为不可用(not available)。
请参阅图6，图6是本发明实施例公开的一种IAB网络的应用场景示意图。如图6所示，IAB网络考虑了两种场景。一种场景为位于IAB宿主覆盖边缘的IAB节点，可以同时连接到多个不同IAB宿主所辖范围内的父节点，建立回传链路，并可以利用这多个不同IAB宿主控制范围的回传网络，为UE或其他IAB节点提供接入和回传服务。另一种场景为考虑到IAB节点的移动性，可移动的IAB节点可能会在不同的IAB宿主之间进行切换。
在上述两种场景中，需要考虑IAB-DU小区配置、IP地址管理、BAP地址管理、BAP路由(routing)ID配置等问题，以保证IAB节点在接受不同IAB宿主服务时数据的正确传输，可以 避免IAB-DU服务的小区和周围小区发生标识冲突。IAB-DU小区配置可以包括DU的小区(cell)的标识分配、DU的小区的资源配置、满足双工约束等。
目前，IAB网络中的拓扑管理功能由IAB宿主(具体可以是IAB宿主CU或IAB宿主CU-CP)执行，只能进行IAB宿主内的拓扑管理。例如，IAB宿主在自己所辖范围内分配BAP路由ID，可以保证在宿主范围内唯一标识到一个目的节点的一条传输路径。当IAB节点处于不同IAB宿主覆盖范围内时，如果两个IAB宿主CU-CP为各自所管辖的IAB节点配置的BAP路由ID相同，但这个BAP路由ID实际上标识的是到不同目标节点的不同传输路径，当这个BAP路由ID在两个IAB宿主所辖的网络中标识的两个不同路径上有共同节点时，则携带该BAP路由ID的数据包在传输到这个或这些共同节点上时，会无法正常进行数据包的路由，可能会出错。因此，在上述两种场景中，为了使能IAB节点能够正常工作，一种可能的方式是需要不同IAB宿主CU-CP之间进行协调和交互，以致信令开销大，从而造成了传输资源的浪费。此外，由于协调和交互的时延不容忽视，以致数据传输的时延较大。
此外，由于IAB-DU小区的管理和配置主要由OAM负责，在IAB节点执行跨IAB宿主的切换过程中，有些小区的配置(如小区全局标识(cell global identity，CGI))会发生变化。而依赖于OAM小区配置的更新，要么需要在切换过程中频繁的从OAM获取，时效性较差，要么需要预先配置多套可能的配置，所能应用的场景有限(基于准确的预测)，且初始配置的信令开销将非常大。OAM配置多套可能的配置时，需要OAM对IAB节点的移动提前进行一定的预测。
可见，如何提供一种简洁高效的拓扑管理和IAB小区管理的方式，便于对处于两个或多个IAB宿主边界的IAB节点，以及具有移动性的IAB节点进行管理，以减少IAB宿主之间的信令交互，为IAB节点及时提供必要的配置信息已成为必要。
为了更好地理解本发明实施例，下面先对本发明实施例使用的网络架构进行描述。请参阅图7，图7是本发明实施例公开的一种网络架构示意图。如图7所示，该网络架构可以包括一个或多个UE(图中示意出了一个)、一个或多个IAB节点(图中示意出了两个)、多个IAB宿主、接入网设备、无线接入网(radio access network，RAN)管理网元和核心网设备。UE与IAB节点可以通过NR Uu口进行通信。当接入网设备为LTE中的接入网设备时，UE与接入网设备之间以及IAB节点与接入网设备之间可以通过LTE Uu进行通信，当接入网设备为NR中的接入网设备时，UE与接入网设备之间以及IAB节点与接入网设备之间可以通过NR Uu进行通信。IAB节点之间以及IAB节点与IAB宿主之间可以通过NR BH进行通信。核心网设备可以包括5G核心网(5G core，5GC)和EPC。IAB宿主与5GC之间以及接入网设备与5GC之间可以通过NG进行通信。IAB宿主与EPC之间以及接入网设备与EPC之间可以通过S1进行通信。当接入网设备为LTE中的接入网设备时，IAB宿主与接入网设备之间可以通过X2-C进行通信，当接入网设备为NR中的接入网设备时，IAB宿主与接入网设备之间可以通过Xn-C进行通信。
在IAB节点工作在SA模式时，IAB节点可以单连接到一个父节点，也可以双连接到两个父节点。这两个父节点可以由同一个IAB宿主控制，也可以由不同的IAB宿主控制。IAB节点的DU部分与一个IAB宿主之间建立F1接口即可，该IAB宿主可以连接到5GC。IAB宿主CU-CP可以通过NG控制面接口连接到5GC中的控制面网元，如接入和移动性管理功能AMF(access and mobility management function，AMF)网元。IAB宿主CU-UP可以通过NG用户面接口连接到5GC中的用户面网元，如UPF网元。
当IAB节点工作在NSA模式(或者说EN-DC模式)时，IAB宿主CU-UP可以通过S1用户面 接口连接到EPC(如业务网关(serving gateway，SGW))。
请参阅图8，图8是本发明实施例公开的另一种网络架构示意图。如图8所示，该网络架构可以包括多个IAB节点(图中示意出了两个)、多个宿主基站(即IAB宿主)和RAN管理网元。RAN管理网元可以通过Ex接口与宿主基站进行通信。
UE，又可以称之为终端设备、移动台(mobile station，MS)、移动终端(mobile terminal，MT)等，是一种向用户提供语音和/或数据连通性的设备。终端设备可以为手持终端、笔记本电脑、用户单元(subscriber unit)、蜂窝电话(cellular phone)、智能电话(smart phone)、无线数据卡、个人数字助理(personal digital assistant，PDA)电脑、平板型电脑、无线调制解调器(modem)、手持设备(handheld)、膝上型电脑(laptop computer)、无绳电话(cordless phone)或者无线本地环路(wireless local loop，WLL)台、机器类型通信(machine type communication，MTC)终端，可穿戴设备(如智能手表、智能手环、计步器等)，车载设备(如汽车、自行车、电动车、飞机、船舶、火车、高铁等)、虚拟现实(virtual reality，VR)设备、增强现实(augmented reality，AR)设备、工业控制(industrial control)中的无线终端、智能家居设备(如冰箱、电视、空调、电表等)、智能机器人、车间设备、无人驾驶(self driving)中的无线终端、远程手术(remote medical surgery)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端，或智慧家庭(smart home)中的无线终端、飞行设备(如智能机器人、热气球、无人机、飞机等)或其他可以接入网络的设备。
IAB节点用于为子节点或UE提供接入服务和回传服务。
IAB宿主，为支持IAB节点的接入网设备。
5GC用于对UE进行鉴权、移动性管理、PDU会话管理等，包含AMF网元、UPF网元等功能实体或网元。
EPC用于对UE进行鉴权、移动性管理、分组数据网络(packet data network，PDN)连接管理等，包含移动管理实体(mobility management entity，MME)、分组数据网关(PDN gateway，PGW)等网元。
RAN管理网元为新引入的网元，可以为一个或多个IAB宿主的IAB节点执行拓扑管理和小区管理等。RAN管理网元可以与这一个或多个IAB宿主之间建立通信接口。通信接口可以为Ex接口，也可以为其它名称，本发明对它的名称不进行限定，本发明以第一接口为例进行描述。RAN管理网元也可以为其它名称，本发明对它的名称不进行限定，本发明以RAN管理网元为例进行描述。
应理解，RAN管理网元可以为一个独立的网元或实体，也可以为一个逻辑网元。逻辑网元可以设置在一个IAB宿主中。
需要说明的是，图7和图8所示的系统架构中不限于仅包括图中所示的网元和设备，还可以包括其它未在图中表示的网元或设备，具体本发明在此处不再一一列举。
为了更好地理解本发明实施例，可以先对本发明实施例使用的符号和用语进行介绍。
接入IAB节点为与终端设备直接连接的IAB节点，即终端设备接入的IAB节点。中间IAB节点是为其它IAB节点提供无线回传服务的IAB节点，即在一条路径中处于接入IAB节点与IAB宿主之间的IAB节点。例如，在图1所示的路径IAB宿主→IAB节点1→IAB节点3→IAB节点4中，IAB节点4为接入IAB节点，IAB节点1和IAB节点3为中间IAB节点。
可以理解的是，对于一个IAB节点来说，当其对于接入到该IAB节点服务的小区的终端设 备而言，是接入IAB节点的角色；当其对于该IAB节点的子/孙IAB节点或接入到子/孙IAB节点服务的小区的终端设备而言，是中间IAB节点的角色。
第一IAB节点的子节点为与第一IAB节点直接连接且处于第一IAB节点的下游的节点，即直接接入第一IAB节点服务的小区的节点。第一IAB节点的孙节点为与第一IAB节点间接连接且处于第一IAB节点的下游的节点，例如接入到第一IAB节点的子节点所服务的小区的节点，或者通过至少两跳无线回传链路与第一IAB节点连接的第一IAB节点的下游的节点。子节点和孙节点均可以认为是第一IAB节点的下属节点。第一IAB节点的子节点和第一IAB节点的孙节点，可以为IAB节点，也可以为终端设备。第一IAB节点的父节点为与第一IAB节点直接连接且处于第一IAB节点的上游的节点，即为第一IAB节点直接提供接入服务的节点，第一IAB节点接入到其父节点所服务的小区中。第一IAB节点的父节点可以为IAB节点，也可以为IAB宿主。例如，图1中的IAB节点2的父节点为IAB节点1，IAB节点2的子节点为IAB节点4和IAB节点5，IAB节点2的孙节点为UE1和UE2。再例如，图1中的IAB节点1的父节点为IAB宿主，IAB节点1的子节点为IAB节点2和IAB节点3，IAB节点1的孙节点为IAB节点4、IAB节点5、UE1和UE2。IAB节点的下游的节点为经过该IAB节点与IAB宿主建立连接的节点。IAB节点的上游的节点可以包括处于IAB节点与IAB宿主之间链路上的节点，还可以包括IAB宿主，更靠近IAB宿主。
第一IAB宿主/第一IAB节点的下一跳节点：是指在包括第一IAB宿主/第一IAB节点的路径中的、在第一IAB宿主/第一IAB节点之后第一个接收到数据包的节点。第一IAB宿主/第一IAB节点的下一跳节点也可以称为数据包的下一跳节点。
符号“/”表示“或”。
基于上述网络架构，请参阅图9，图9是本发明实施例公开的一种通信方法的流程示意图。如图9所示，该通信方法可以包括以下步骤。
RAN管理网元可以通过第一接口连接多个IAB宿主，可以理解为RAN管理网元可以通过第一接口管理一个或多个IAB宿主，也可以理解为在RAN管理网元管理所辖范围内有多个IAB宿主。第一IAB宿主可以通过一个或多个IAB节点与一个或多个终端设备连接，可以理解为第一IAB宿主可以通过管理的一个或多个IAB节点与一个或多个终端设备连接，也可以理解为第一IAB宿主可以通过在第一IAB宿主所辖范围内的一个或多个IAB节点与一个或多个终端设备连接。第一IAB宿主为与RAN管理网元连接的多个IAB宿主中的任一IAB宿主，可以理解为RAN管理网元管理的多个IAB宿主中的任一IAB宿主，也可以理解为RAN管理网元所辖范围内的多个IAB宿主中的任一IAB宿主。
第一IAB宿主与第一IAB节点可以通过无线回传链路连接，可以通过一跳无线回传链路连接，即第一IAB宿主与第一IAB节点直接连接，也即第一IAB宿主与第一IAB节点之间没有其它IAB节点；也可以通过多跳无线回传链路，即第一IAB宿主与第一IAB节点间接连接，也即第一IAB宿主与第一IAB节点之间有其它IAB节点。第一IAB节点为与第一IAB宿主连接的一个IAB节点，其它与第一IAB宿主连接的IAB节点与第一IAB节点类似，下面以第一IAB节点为例进行说明。应理解，第一IAB节点为第一IAB宿主所辖范围内的IAB节点，即第一IAB宿主管理的IAB节点。
第一IAB宿主与第一IAB节点连接，可以理解为第一IAB宿主与第一IAB节点直接连接，即第一IAB宿主与第一IAB节点之间没有其它IAB节点；也可以理解为第一IAB宿主与第一IAB节点间接连接，即第一IAB宿主与第一IAB节点之间有其它IAB节点。例如，图1中的IAB宿主与IAB节点1直接连接，图1中的IAB宿主与IAB节点2和IAB节点3间接连接。
请参阅图10，图10是本发明实施例公开的一种RAN管理网元与第一IAB宿主之间第一接口的控制面协议栈的示意图。如图10所示，RAN管理网元与第一IAB宿主之间第一接口的控制面协议栈可以包括无线网络层(radio network layer)和传输网络层(transport network layer)。无线网络层可以包括第一接口应用协议(application protocol，AP)层。传输网络层可以包括PHY层、数据链路层(data link layer)、IP层和SCTP层。第一接口AP层为新引入的协议层，主要用于第一接口管理、IAB网络的各类配置和更新、维护IAB网络中各个节点的上下文信息等。
901.RAN管理网元确定第一IAB宿主和/或第一IAB节点的配置信息。
当第一IAB宿主和/或第一IAB节点需要配置信息时，RAN管理网元可以确定第一IAB宿主和/或第一IAB节点的配置信息，可以理解为确定第一IAB宿主的配置信息，也可以理解为确定第一IAB节点的配置信息，还可以为理解为确定第一IAB宿主和第一IAB节点的配置信息。第一IAB宿主的配置信息可以包括第一IAB宿主的地址信息、路由信息和小区信息中的一种或多种。第一IAB节点的配置信息可以包括第一IAB节点的地址信息、路由信息和小区信息中的一种或多种。当接收到来自第一IAB宿主的用于请求第一IAB宿主和/或第一IAB节点的配置信息的请求消息，或者获取到第一IAB宿主和/或第一IAB节点的拓扑信息，或者获取到第一IAB宿主和/或第一IAB节点的更新的拓扑信息时，可以确定第一IAB宿主和/或第一IAB节点需要配置信息。
地址信息可以包括BAP层标识和/或IP地址。第一IAB宿主的地址信息包括BAP层标识，不包括IP地址。第一IAB节点的地址信息可以包括BAP层标识和/或IP地址，可以理解为包括BAP层标识，也可以理解为包括IP地址，还可以理解为同时包括BAP层标识和IP地址。BAP层标识可以为BAP地址(address)，也可以为其它可以唯一标识第一IAB宿主或第一IAB节点的BAP层的信息。可见，IP地址是配置给IAB节点的，可以为IPv4地址，也可以为IPv6地址，还可以为IPv6地址前缀，还可以为其它IP地址，在此不加限定。当第一IAB宿主的CU和DU分离时，第一IAB宿主的配置信息可以理解为第一IAB宿主DU的配置信息。
路由信息可以包括适配层路由标识(即BAP routing ID)和/或路由映射表。第一IAB宿主和/或第一IAB节点的路由信息可以包括适配层路由标识和/或路由映射表。当第一IAB节点为中间IAB节点时，第一IAB节点的路由信息可以包括路由映射表，可以不包括适配层路由标识。当第一IAB节点为接入IAB节点时，第一IAB节点的路由信息可以包括适配层路由标识，此外，第一IAB节点的路由信息还可以包括路由映射表。当第一IAB节点为接入IAB节点时，如果第一IAB节点的路由信息不包括路由映射表，则可以将第一IAB节点的默认或者缺省(default)路由确定为第一IAB节点的路由映射表。默认路由仅包含一个default的BAP routing ID，该default BAP routing ID可以是指向一条默认的传输路径，该默认传输路径中第一IAB节点的下一跳节点可以是：第一IAB节点的父节点中服务于第一IAB节点所接入的主小区组(MCG)的那个父节点。第一IAB宿主的路由信息可以包括适配层路由标识，此外，第一IAB宿主的路由信息还可以包括路由映射表。
适配层路由标识用于标识到一个目的节点的传输路径。适配层路由标识可以包括目的节点的BAP层标识(如BAP address)和BAP层路径标识(即BAPpathID)。此处的目的节点可以为数据包在无线回传链路上的目的节点，可以为IAB节点，也可以为IAB宿主，还可以为终端设备。当第一IAB宿主的CU和DU分离时，目的节点还可以为IAB宿主DU。
举例说明，针对图1所示的IAB独立组网，RAN管理网元可以为IAB宿主与IAB节点4之间的两条不同下行传输路径分别配置不同的路径标识。例如，RAN管理网元可以为路径：IAB 宿主→IAB节点1→IAB节点3→IAB节点4配置BAP路径ID1，可以为路径：IAB宿主→IAB节点1→IAB节点2→IAB节点4配置BAP路径ID2。RAN管理网元可以结合这两条传输路径所对应的目的节点IAB节点4的BAP层标识，可以得到指向这两条传输路径的适配层路由标识分别为BAP routingID1和BAP routingID 2。每个BAP routingID包括传输的目的节点的BAP层标识，以及到该目的节点的BAP层路径标识BAP pathID。
路由映射表可以包括适配层路由标识(BAP routing ID)和下一跳节点的标识。第一IAB宿主的路由映射表可以包括第一IAB宿主的适配层路由标识和下一跳节点的标识。第一IAB宿主的下一跳节点可以为IAB节点。
第一IAB节点的路由映射表可以包括第一IAB节点的适配层路由标识和下一跳节点的标识。第一IAB节点的下一跳节点，可以为IAB节点，也可以为IAB宿主(或IAB宿主DU)，还可以为终端设备。
当下一跳节点为IAB节点时，下一跳节点的标识可以为该IAB节点的BAP层标识，也可以为该IAB节点的IP地址，还可以为其它可以唯一标识该IAB节点的信息。
当下一跳节点为终端设备时，下一跳节点的标识可以为终端设备的标识，还可以为其它可以唯一标识终端设备的信息。
当下一跳节点为IAB宿主时，下一跳节点的标识可以为IAB宿主的BAP层标识，也可以为其它可以唯一标识IAB宿主的信息(例如IAB宿主的IP层标识)。当下一跳节点为IAB宿主DU时，下一跳节点的标识可以为IAB宿主DU的BAP层标识，也可以为其它可以唯一标识IAB宿主DU的信息，如IAB宿主的IP层标识。RAN管理网元确定的路由映射表的信令结构可以为：>IAB node/IAB donor DU标识(第一IAB节点/第一IAB宿主DU标识，用于指示下述BAP routing ID list中的内容是哪一个节点所需的路由映射表)
>>BAP routing ID list(适配层路由标识列表，可以包含一项或多项，其中每一项中包含一个BAProuting ID，和一个下一跳节点(Next hop Node))
>>>BAP routing ID(适配层路由标识)
>>>Next hop Node(下一跳节点)
上述RAN管理网元确定的路由映射表的信令结构，RAN管理网元可以向第一IAB宿主(或第一IAB宿主CU，或第一IAB宿主CU-CP)提供路由映射表，故在该路由映射表中，可以包含多个不同的IAB节点和/或IAB宿主DU所需的路由映射表。其中包含第一IAB节点和/或第一IAB宿主DU的所需的路由映射表。当该步骤901中，RAN管理网元确定的路由映射表仅为第一IAB节点或第一IAB宿主DU的路由映射表时，路由映射表对应的上述信令结构中的第一行的内容可以是可选(optional)存在的，即可以不包含IAB node/IAB donor DU标识部分。
小区信息可以包括小区的标识和小区的资源配置。第一IAB宿主的小区信息可以包括为第一IAB宿主服务的小区的标识和小区的资源配置。第一IAB节点的小区信息可以包括为第一IAB节点服务的小区的标识和小区的资源配置。
小区的标识可以为物理小区标识(physical cell identifier，PCI)，也可以为NR小区标识(NR cell identifier，NCI)，还可以为其它可以唯一标识小区的信息。
小区的资源配置可以包括以下一种或者多种：小区的频点信息、小区的带宽信息、小区的上下行双工模式、小区的传输资源配置、小区的同步信号和广播块(synchronization signal and PBCH block，SSB)传输配置(SSB transmission configuration，STC)配置、小区公共的随机接入资源配置、小区公共的IAB专用的随机接入资源配置、小区的信道状态信息参考信号(channel status information reference signal，CSI-RS)配置、小区的调度请求(scheduling  request，SR)配置、系统信息块(system information block，SIB)1中配置的发送物理下行控制信道(physical downlink control channel，PDCCH)的位置和公共的子载波间隔配置。
上下行双工模式可以为TDD模式，也可以为频分双工(frequency division duplexing，FDD)模式。
小区的传输资源配置可以包含每个时隙(slot)中下行(downlink)符号(symbol)/上行(uplink)符号/灵活(flexible)符号的属性配置，属性可以为硬(hard)，也可以为软(soft)，还可以为不可用(not available)。当小区的上下行双工模式为TDD模式时，小区的传输资源配置还可以包含每个时隙中下行符号、上行符号以及灵活符号的位置和个数。
RAN管理网元可以对RAN管理网元所辖范围内的IAB宿主和IAB节点进行地址管理，可以理解为RAN管理网元可以为所辖范围内的IAB节点和/或IAB宿主确定BAP层标识和/或IP地址。可见，RAN管理网元可以对第一IAB宿主和/或第一IAB节点的地址进行管理，即RAN管理网元可以为第一IAB宿主和/或第一IAB节点确定BAP层标识和/或IP地址。具体分配给所辖范围内的哪些IAB节点和/或哪些IAB宿主，可以根据IAB节点和/或IAB宿主的需要确定，也可以根据IAB宿主的请求确定。
在一种情况下，在RAN管理网元与第一IAB宿主之间建立第一接口过程中或建立第一接口之后，RAN管理网元可以确定一个BAP层标识列表。这个BAP层标识列表可以如表1-表4的任一个所示：
BAP层标识
BAP层标识1
BAP层标识2
…
BAP层标识N
表1 BAP层标识列表
IAB宿主/IAB节点的标识 BAP层标识
IAB宿主1 BAP层标识1
IAB节点1 BAP层标识2
… …
IAB节点N-1 BAP层标识N
表2 BAP层标识列表
BAP层标识 IAB宿主/IAB节点的标识
BAP层标识1 IAB宿主1
BAP层标识2 IAB宿主1
BAP层标识3 IAB节点1
BAP层标识4 IAB节点1
… …
BAP层标识N IAB节点M
表3 BAP层标识列表
IAB宿主/IAB节点的标识 BAP层标识
IAB宿主标识1 BAP层标识1、BAP层标识2
IAB节点1 BAP层标识3、BAP层标识4
… …
IAB节点M BAP层标识N
表4 BAP层标识列表
如表1所示，RAN管理网元可以确定第一IAB宿主以及第一IAB宿主管理的IAB节点使用的BAP层标识，但可以不确定哪一个BAP层标识由哪一个IAB节点或第一IAB宿主使用。可以由第一IAB宿主决定哪一个BAP层标识由哪一个IAB节点或第一IAB宿主使用。如表2所示，RAN管理网元可以为第一IAB宿主以及第一IAB宿主管理的IAB节点中的每一个IAB节点确定一个BAP层标识。如表3或表4所示，RAN管理网元可以为第一IAB宿主或第一IAB宿主管理的IAB节点确定一个BAP层标识，也可以确定多个BAP层标识。
当IAB宿主的CU和DU分离时，如表1所示，RAN管理网元可以确定第一IAB宿主DU以及第一IAB宿主CU管理的IAB节点使用的BAP层标识，但可以不确定哪一个BAP层标识由哪一个IAB节点或第一IAB宿主的哪一个DU使用。可以由第一IAB宿主的CU或CU-CP决定哪一个BAP层标识由哪一个IAB节点或第一IAB宿主的哪一个DU使用。如表2所示，RAN管理网元可以为第一IAB宿主的DU以及第一IAB宿主管理的IAB节点中的每一个IAB节点确定一个BAP层标识。如表3或表4所示，RAN管理网元可以为第一IAB宿主DU或第一IAB宿主管理的IAB节点确定一个BAP层标识，也可以确定多个BAP层标识。
应理解，表1-表4只是对BAP层标识列表的示例性说明，并不对BAP层标识列表构成限定。例如，BAP层标识列表可以只包括为第一IAB宿主管理的所有IAB节点或部分IAB节点使用的BAP层标识。
类似地，在RAN管理网元与第一IAB宿主之间建立第一接口之后，RAN管理网元可以确定一个IP地址列表。这个IP地址列表可以包括第一IAB节点的IP地址，即可以包括分配给第一IAB节点的IP地址。其中，每个IP地址具体可以是IPv4地址，也可以是IPv6地址，还可以为IPv6地址前缀。这个IP地址列表可以如表5-表8中的任一个所示：
IP地址
IP地址1
IP地址2
…
IP地址N
表5 IP地址列表
IAB节点的标识 IP地址
IAB节点1 IP地址1
IAB节点2 IP地址2
… …
IAB节点N IP地址N
表6 IP地址列表
IP地址 IAB节点的标识
IP地址1 IAB节点1
IP地址2 IAB节点1
IP地址3 IAB节点2
IP地址4 IAB节点2
… …
IP地址N IAB节点M
表7 IP地址列表
IAB节点的标识 IP地址
IAB节点1 IP地址1、IP地址2
IAB节点2 IP地址3、IP地址4
… …
IAB节点M IP地址N
表8 IP地址列表
如表5所示，RAN管理网元可以确定为第一IAB宿主管理的IAB节点使用的IP地址，但可以不确定哪一个IP地址由哪一个IAB节点使用。可以由第一IAB宿主决定哪一个IP地址由哪一个IAB节点使用。如表6所示，RAN管理网元可以为第一IAB宿主管理的IAB节点中的IAB节点分别确定一个IP地址。如表7或表8所示，RAN管理网元可以为第一IAB宿主管理的IAB节点确定一个IP地址，也可以确定多个IP地址。
应理解，表5-表8只是对IP地址列表的示例性说明，并不对IP地址列表构成限定。例如，IP地址列表可以只包括为第一IAB宿主管理的所有IAB节点或部分IAP节点使用的IP地址。
此外，IP地址列表还可以包括IP地址的用途。例如，IP地址列表还可以包括每个IP地址的用途，用途可以为用于F1接口的用户面(F1-U)业务，也可以用于F1接口的控制面(F1-C)业务，还可以用于非F1接口(non-F1)业务。若不包含IP地址的用途，则可以认为该IP地址可用于所有类型的业务。
其中，M为大于或等于1的整数，N为大于或等于M的整数。
另一种情况下，RAN管理网元可以基于第一IAB宿主的请求消息，为第一IAB宿主提供地址信息。请参阅图11，图11是本发明实施例公开的一种IAB宿主获取地址信息的示意图。如图11所示，当第一IAB宿主和/或第一IAB节点需要地址信息时，第一IAB宿主可以通过第一接口向RAN管理网元发送用于请求地址信息的第一请求消息。第一请求消息可以请求BAP层标识和/或IP地址。RAN管理网元接收到来自第一IAB宿主的第一请求消息之后，可以响应于第一请求消息，通过第一接口向第一IAB宿主发送第一应答消息。第一应答消息携带有确定的第一IAB宿主和/或第一IAB节点的地址信息。第一IAB宿主和/或第一IAB节点的地址信息可以是RAN管理网元在接收到第一请求消息之前确定的，也可以是RAN管理网元接收到第一请求消息之后确定的。当第一IAB宿主和/或第一IAB节点的地址信息是在接收到第一请求消息之后确定的时，RAN管理网元可以响应于第一请求消息，先确定第一IAB宿主和/或第一IAB节点的地址信息，之后再通过第一接口向第一IAB宿主发送第一应答消息。
第一请求消息可以携带有如下信息中的一项或多项：所需BAP层标识的数量、所需BAP层标识的IAB节点的标识、第一IAB宿主的标识、所需IP地址的类型、所需IP地址的数量、所需IP地址的用途、所需IP地址的IAB节点的标识。当第一IAB宿主的DU和CU分离时，第一请求消息中的第一IAB宿主的标识可以替换为所需BAP层标识的第一IAB宿主DU的标识。可见，第一请求消息可以只携带有所需BAP层标识的数量，可以不携带每个IAB节点所需BAP层标识的数量，也可以不携带第一IAB宿主(或第一IAB宿主DU)所需BAP层标识的数量。第一请求消息可以只携带有所需IP地址的数量，可以不携带每个IAB节点所需IP地址的数量。RAN管理网元可以将所有BAP层标识和/或所有IP地址发送给第一IAB宿主，由第一IAB宿主对所有 BAP层标识和/或所有IP地址进行分配。
第一请求消息包含所需IP地址的类型时，所需IP地址的类型可以是IPv4地址、IPv6地址、IPv6地址前缀中的一种或多种。对应于每一种不同的IP地址的类型，第一请求消息还可以包含每种IP地址的类型所需的数量(即所需IP地址的数量)，或者对应于不同IP地址的用途的每种IP地址的类型所需的数量。例如，第一请求消息可以携带请求用于F1-C/F1-U/non-F1业务传输的IPv4地址/IPv6地址/IPv6地址前缀的数量。当第一请求消息携带所需IP地址的类型、所需IP地址的数量、所需IP地址的用途中的一项或多项时，还可以携带具体需要IP地址的IAB节点的标识(即所需IP地址的IAB节点的标识)。例如，第一请求消息可以携带第一IAB节点的标识，以及第一IAB节点所需的用于F1-C/F1-U/non-F1业务传输的IPv4地址/IPv6地址/IPv6地址前缀的数量。当第一请求消息不携带所需IP地址的用途时，可以认为请求的IP地址可以适用于所有业务类型。
第一请求消息也可以包括第一IAB宿主所需地址的数量、第一IAB节点所需地址的数量、第一IAB宿主的标识和第一IAB节点的标识中的一种或多种。第一IAB宿主所需地址可以理解为第一IAB宿主所需BAP层标识。当第一IAB宿主为CU-DU分离的架构时，第一IAB宿主所需地址可以理解为是第一IAB宿主DU所需BAP层的标识。第一IAB节点所需地址可以理解为第一IAB节点所需BAP层标识和/或IP地址。可见，第一请求消息可以携带有需要BAP层标识的每个IAB节点所需BAP层标识的数量。此外，第一请求消息还可以携带第一IAB宿主所需BAP层标识的数量。当第一IAB宿主为CU-DU分离的架构时，第一请求消息可以携带一个或多个第一IAB宿主DU的标识。可选地，第一请求消息还可以携带每个第一IAB宿主DU所需BAP层标识的数量。第一请求消息还可以携带需要IP地址的每个IAB节点所需IP地址的数量、类型、用途等信息，具体可参考上一段的描述。以便RAN管理网元可以直接为第一IAB节点和第一IAB宿主确定分配的地址，不需要第一IAB宿主进行分配，可以减少第一IAB宿主的处理过程，从而可以节约第一IAB宿主的功耗。
当第一IAB宿主和/或第一IAB节点均只需要一个BAP层标识时，第一请求消息可以不携带或不包括所需BAP层标识的数量，或者不包括第一IAB宿主和/或第一IAB节点所需BAP层标识的数量。当第一IAB节点只需要一个IP地址，即第一IAB宿主管理的IAB节点均需要一个IP地址时，第一请求消息可以不携带所需IP地址的数量，或者可以不包括第一IAB节点所需IP地址的数量。当第一IAB宿主和/或第一IAB节点均需要一个BAP层标识，且第一IAB节点只需要一个IP地址时，第一请求消息可以不携带所需BAP层标识的数量和所需IP地址的数量，或者可以不包括第一IAB宿主所需BAP层标识的数量，和/或第一IAB节点所需BAP层标识和/或IP地址。此时，当第一请求消息携带有第一IAB宿主的标识时，RAN管理网元可以为第一IAB宿主确定一个BAP层标识。当第一请求消息携带有第一IAB节点的标识时，可以为第一IAB节点确定一个BAP层标识和/或一个IP地址。
又一种情况下，第一IAB宿主可以在一个IAB节点接入网络后，可以向RAN管理网元发送第一请求消息。此时，第一请求消息中可以携带有：这个IAB节点的标识、这个IAB节点所需BAP层标识的数量、这个IAB节点所需IP地址的类型、这个IAB节点所需IP地址的用途和对应于每种用途的IP地址的数量等信息。当只需要一个BAP层标识时，第一请求消息可以不携带这个IAB节点所需BAP层标识的数量。当只需要一个IP地址时，第一请求消息可以不携带这个IAB节点所需IP地址的数量。当第一请求消息携带有这个IAB节点所需IP地址的数量，第一请求消息还可以携带有IP地址的用途。
可见，当需要IP地址的IAB节点均只需要一个IP地址时，第一请求消息可以不携带所需IP 地址的数量或每个IAB节点所需IP地址的数量，RAN管理网元可以默认为每个需要IP地址的IAB节点分配一个IP地址。当需要BAP层标识的IAB节点和/或第一IAB宿主均只需要一个BAP层标识时，第一请求消息可以不携带所需BAP层标识的数，或者每个IAB节点和/或第一IAB宿主所需IP地址的数量，RAN管理网元可以默认为每个需要BAP层标识的IAB节点和/或第一IAB宿主分配一个BAP层标识。
RAN管理网元可以对RAN管理网元所辖范围内的IAB宿主和IAB节点进行路由管理。RAN管理网元可以为所辖范围内的IAB节点和/或IAB宿主确定路由信息。可见，RAN管理网元可以对第一IAB宿主和/或第一IAB节点的路由进行管理。RAN管理网元可以为第一IAB宿主和/或第一IAB节点确定路由信息。RAN管理网元可以通知第一IAB宿主每个适配层路由标识(BAP routing ID)所对应的传输路径中包括的节点标识和顺序。
RAN管理网元均需要确定第一IAB宿主和/或第一IAB节点的适配层路由标识。当第一IAB宿主和/或第一IAB节点需要路由映射表时，RAN管理网元可以基于适配层路由标识为第一IAB宿主和/或第一IAB节点确定路由映射表。
为了使RAN管理网元能够得到第一IAB宿主下的网络拓扑，第一IAB宿主可以将拓扑信息主动发送(即上报)给RAN管理网元。当第一IAB宿主为CU-DU分离的架构时，第一IAB宿主CU或者第一IAB宿主CP-UP可以将拓扑信息主动上报给RAN管理网元。拓扑信息可以包括第一IAB宿主(或第一IAB宿主DU)和/或第一IAB节点与其它节点之间的连接关系。此外，拓扑信息还可以包括第一IAB宿主(或第一IAB宿主DU)的标识和/或第一IAB节点的标识。当第一IAB宿主(或第一IAB宿主DU)和/或第一IAB节点的网络拓扑发生变化时，第一IAB宿主可以向RAN管理网元发送更新的拓扑信息。例如，当有新的IAB节点新连接到第一IAB宿主，或者有旧的IAB节点离开第一IAB宿主所辖范围与第一IAB宿主断开连接，或者有IAB节点建立双连接，或者有IAB节点在无线回传链路发生无线链路失败(radio link failure，RLF)时，可以认为第一IAB宿主和/或第一IAB节点的网络拓扑发生变化。其它节点可以为终端设备，也可以为IAB节点，还可以IAB宿主。其它节点可以包括第一IAB宿主所辖范围内的节点，还可以包括其它IAB宿主所辖范围内的节点。其它IAB宿主所辖范围内的节点可以包括其它IAB宿主(或其它IAB宿主DU)、其他IAB宿主所辖的IAB节点、连接到其它IAB宿主所辖小区的终端设备等中的一种或多种。第一IAB节点与其它节点之间的连接关系可以包括第一IAB节点连接的一个或多个父节点的标识，还可以包括第一IAB节点连接的一个或多个子节点的标识。此外，第一IAB节点与其它节点之间的连接关系还可以包括连接到第一IAB节点的一个或多个终端设备的标识，第一IAB节点经过一段或多段无线回传链路所连接的IAB宿主(或IAB宿主DU)的标识。
请参阅图12，图12是本发明实施例公开的一种IAB宿主获取路由信息的示意图。如图12所示，当第一IAB宿主(或第一IAB宿主DU)和/或第一IAB节点需要路由信息时，第一IAB宿主(或者第一IAB宿主CU，或者第一IAB宿主CU-CP)可以向RAN管理网元发送第二请求消息，第二请求消息用于请求路由信息。RAN管理网元接收到来自第一IAB宿主的第二请求消息之后，可以通过第一接口向第一IAB宿主发送第二应答消息。第二应答消息携带有第一IAB宿主(或第一IAB宿主DU)和/或第一IAB节点的路由信息。第一IAB宿主和/或第一IAB节点的路由信息，可以为RAN管理网元接收到第二请求消息之前确定的，也可以为RAN管理网元接收到第二请求消息之后确定的。当第一IAB宿主和/或第一IAB节点的路由信息为RAN管理网元接收到第二请求消息之后确定的时，RAN管理网元可以响应于第二请求消息，先确定第一IAB宿主和/或第一IAB节点的路由信息，之后再通过第一接口向第一IAB宿主发送第二 应答消息。例如，当网络拓扑发生更新后，一些新加入的IAB节点和其它相关节点可能需要路由信息，第二请求消息可以携带需要路由信息的节点的标识，还可以携带这些节点的拓扑信息。其它相关节点可以为与新加入的IAB节点之间有可用传输路径的终端设备、其它IAB节点或第一IAB宿主。
RAN管理网元可以对RAN管理网元所辖范围内的IAB宿主和IAB节点进行小区管理，可以理解为RAN管理网元可以为所辖范围内的IAB节点和/或IAB宿主所服务的小区确定小区的标识和小区的配置信息。可见，RAN管理网元可以对第一IAB宿主和/或第一IAB节点所服务的小区进行管理，即RAN管理网元可以为为第一IAB宿主和/或第一IAB节点服务的小区确定小区的标识和小区的配置信息。
请参阅图13，图13是本发明实施例公开的一种IAB宿主获取小区信息的示意图。如图13所示，当第一IAB宿主和/或第一IAB节点需要小区信息时，第一IAB宿主可以向RAN管理网元发送第三请求消息，第三请求消息用于为第一IAB宿主和/或第一IAB节点服务的小区请求的小区信息。RAN管理网元接收到来自第一IAB宿主的第三请求消息之后，可以通过第一接口向第一IAB宿主发送第三应答消息。第三应答消息携带有为第一IAB宿主和/或第一IAB节点服务的小区的小区信息。小区信息可以是RAN管理网元接收到第三请求消息之后确定的，也可以是接收到第三请求消息之前确定的。当小区信息是RAN管理网元接收到第三请求消息之后确定的时，RAN管理网元可以响应于第三请求消息，先确定为第一IAB宿主和/或第一IAB节点服务的小区的小区信息，之后再通过第一接口向第一IAB宿主发送第三应答消息。
第三请求消息可以携带有第一IAB宿主(或第一IAB宿主DU)和/或第一IAB节点的标识，可以理解为可以携带有。第三请求消息还可以携带有为第一IAB宿主和/或第一IAB节点服务的小区的标识。例如，在第一IAB宿主和/或第一IAB节点获得了初始的小区信息，但是后续需要对部分小区的小区信息进行更新时，则第一IAB宿主还可以在第三请求消息中携带需要更新小区的资源配置的小区的标识。小区信息进行更新，可以理解为对小区的资源配置进行更新或重配置，也可以理解为对小区的标识和小区的资源配置进行更新或重配置。
应理解，上述第一请求消息、第二请求消息和第三请求消息可以合为一个请求消息，即一个请求消息可以同时请求地址信息、路由信息和小区信息。上述第一请求消息、第二请求消息和第三请求消息也可以合为两个请求消息。例如，一个请求消息可以同时请求地址信息和路由信息，另一个请求消息可以请求小区信息。再例如，一个请求消息可以同时请求地址信息和小区信息，另一个请求消息可以请求路由信息。再例如，一个请求消息可以同时请求路由信息和小区信息信息，另一个请求息消息可以请求地址信息。
应理解，当第一IAB宿主的CU和DU分离时，第一IAB宿主的配置信息可以为第一IAB宿主DU的配置信息。
902.RAN管理网元向第一IAB宿主发送第一IAB宿主和/或第一IAB节点的配置信息。
相应地，第一IAB宿主(或者第一IAB宿主CU，或者第一IAB宿主CU-CP)接收来自RAN管理网元的第一IAB宿主和/或第一IAB节点的配置信息，即通过第一接口接收来自RAN管理网元的第一IAB宿主和/或第一IAB节点的配置信息。
RAN管理网元确定出第一IAB宿主和/或第一IAB节点的配置信息之后，可以通过第一接口向第一IAB宿主发送第一IAB宿主和/或述第一IAB节点的配置信息。
第一IAB宿主也可以向RAN管理网元发送请求消息，该请求消息用于请求上述配置信息。RAN管理网元接收到该请求消息之后，可以响应于该请求消息，通过第一接口向第一IAB宿主发送配置信息。该请求消息可以包括第一IAB节点和/或第一IAB宿主所需地址的数量，以 及第一IAB节点和/或第一IAB宿主的标识。该请求消息可以包括拓扑信息，拓扑信息可以包括第一IAB宿主和/或第一IAB节点与其它节点之间的连接关系。该请求消息可以包括为第一IAB宿主和/或第一IAB节点服务的小区的标识。该请求消息可以包括第一IAB节点和/或第一IAB宿主所需地址的数量，第一IAB节点和/或第一IAB宿主的标识，拓扑信息，以及为第一IAB宿主和/或第一IAB节点服务的小区的标识中的一者或多者。详细描述可以参考步骤901中的相关描述。
903.第一IAB宿主获取地址信息、路由信息和小区信息中的一种或多种。
第一IAB宿主接收到来自RAN管理网元的第一IAB宿主和/或第一IAB节点的配置信息之后，可以从第一IAB宿主和/或第一IAB节点的配置信息中获取第一IAB宿主和/或第一IAB节点的地址信息、路由信息和小区信息中的一种或多种，以便后续用于数据或信令传输。数据或信令可以包括上行数据或上行信令，即由终端设备向第一IAB宿主发送的数据或信令，或者由IAB节点向第一IAB宿主发送的信令。数据或信令也可以为下行数据或下行行信令，即由第一IAB宿主向终端设备发送的数据，或由第一IAB宿主向IAB节点发送的信令。
第一IAB宿主接收到来自RAN管理网元的第一IAB节点的配置信息之后，可以向第一IAB节点发送第一IAB节点的配置信息。第一IAB节点接收到来自第一IAB宿主的第一IAB节点的配置信息之后，可以从第一IAB节点的配置信息中获取第一IAB节点的地址信息、路由信息和小区信息中的一种或多种，以便后续用于数据或信令传输。
第一IAB宿主(或者第一IAB宿主CU，或者第一IAB宿主CU-CP)接收到来自RAN管理网元的第一IAB宿主(或第一IAB宿主DU)和/或第一IAB节点的配置信息之后，可以获取第一IAB宿主所辖范围内的IAB宿主DU和/或IAB节点的配置信息(具体包含地址信息、路由信息和小区信息中的一种或多种)。后续第一IAB宿主可以向第一IAB节点发送第一IAB节点的配置信息。此外，当第一IAB宿主为CU-DU分离的架构时，后续第一IAB宿主CU(或第一IAB宿主CU-CP)还可以向第一IAB宿主DU发送该第一IAB宿主DU的配置信息。
当RAN管理网元已经确定好第一IAB节点的配置信息的情况下，第一IAB宿主可以将第一IAB节点的配置信息转发给第一IAB节点。当RAN管理网元没有确定好第一IAB节点的配置信息的情况下，第一IAB宿主先需要确定第一IAB节点的配置信息，之后可以向第一IAB节点发送第一IAB节点的配置信息。可见，当RAN管理网元已经确定好第一IAB节点和/或第一IAB宿主的配置信息的情况下，第一IAB宿主不需要确定第一IAB节点和/或第一IAB宿主的配置信息。当RAN管理网元没有确定好第一IAB节点和/或第一IAB宿主的配置信息的情况下，第一IAB宿主需要确定第一IAB节点和/或第一IAB宿主的配置信息。例如，当地址信息包括如表1的BAP层标识列表和/或表5所示的IP地址列表时，第一IAB宿主先需要确定第一IAB宿主和/或第一IAB节点的BAP层标识，和/或第一IAB节点的IP地址。
基于上述网络架构，请参阅图14，图14是本发明实施例公开的另一种通信方法的流程示意图。如图14所示，该通信方法可以包括以下步骤。
1401.第一IAB宿主向RAN管理网元发送第一接口建立请求消息。
相应地，RAN管理网元接收来自第一IAB宿主的第一接口建立请求消息。
当第一IAB宿主需要对第一IAB宿主管理的IAB节点提供服务时，为了保证数据的正常传输，可以先向RAN管理网元发送第一接口建立请求消息。第一接口建立请求消息用于请求建立第一接口。第一接口建立请求消息可以为第一接口setup request消息，也可以为其它消息，对它的名称不进行限定。
第一接口建立请求消息可以携带有第一IAB宿主的标识。第一IAB宿主的标识可以为第一IAB宿主CU的标识，也可以为第一IAB宿主CU-CP的标识，还可以为第一IAB宿主对应的基站的标识(gNB ID)，还可以为第一IAB宿主DU的标识，还可以为其它可以用于唯一标识第一IAB宿主的信息。第一IAB宿主CU的标识可以为CU的名称，也可以为OAM为第一IAB宿主CU配置的CU ID，还可以为第一IAB宿主CU的IP地址，还可以为其它可以唯一标识第一IAB宿主CU的信息。第一接口建立请求消息还可以携带有拓扑信息。拓扑信息可以包括第一IAB宿主管理的节点的标识以及节点之间的连接关系。第一IAB宿主管理的节点可以包括第一IAB宿主管理的IAB节点。当第一IAB宿主的CU和DU分离时，第一IAB宿主管理的节点还可以包括第一IAB宿主的一个或多个宿主DU。第一IAB宿主管理的节点还可以包括终端设备。节点之间的连接关系可以包括IAB节点之间的连接关系，还可以包括IAB节点与终端设备之间的连接关系，还可以包括IAB节点与IAB宿主(或IAB宿主DU)之间的连接关系。连接关系可以为父子关系。
1402.RAN管理网元向第一IAB宿主发送第一接口建立响应消息。
相应地，第一IAB宿主接收来自RAN管理网元的第一接口建立响应消息。
RAN管理网元接收到来自第一IAB宿主的第一接口建立请求消息之后，可以向第一IAB宿主发送第一接口建立响应消息。第一IAB宿主接收到来自RAN管理网元的第一接口建立响应消息之后，表明第一IAB宿主与RAN管理网元之间的第一接口建立完成，第一IAB宿主与RAN管理网元之间可以通过第一接口进行通信。第一接口建立响应消息可以为第一接口setup response消息，也可以为接口setup response消息，还可以为其它消息，对它的名称不进行限定。第一接口可以为Ex接口，也可以为其它接口，对它的名称不进行限定。
第一接口建立响应消息可以携带有配置信息，该配置信息可以为第一IAB宿主和/或第一IAB节点的配置信息。详细描述可以参考步骤901中的描述。步骤902中的请求消息可以为第一接口建立请求消息。
1403.第一IAB宿主通过第一接口向RAN管理网元发送第一更新请求消息。
相应地，RAN管理网元接收来自第一IAB宿主(或第一IAB宿主CU或第一IAB宿主CU-CP)的第一更新请求消息。
当第一IAB宿主管理的节点的网络拓扑发生变化，或者网络中的业务流量发生变化时，若需要对第一IAB节点和/或第一IAB宿主的网络拓扑关系进行调整，第一IAB宿主可以通过第一接口向RAN管理网元发送第一更新请求消息，即向RAN管理网元发起IAB配置更新流程。第一更新请求消息用于获取第一IAB节点和/或第一IAB宿主更新的配置信息。第一更新请求消息可以为IAB配置更新请求消息(即IAB CONFIGURATIONUPDATE REQUEST消息)，也可以为其它消息，对它的名称不进行限定。
第一更新请求消息可以携带有第一IAB宿主管理的节点更新的拓扑信息。更新的拓扑信息可以包括新增的IAB节点的标识，以及新增的IAB节点与已有IAB节点之间的连接关系。更新的拓扑信息也可以包括离开的IAB节点(包括切换走的IAB节点，或者休眠的IAB节点等)的标识。更新的拓扑信息还可以包括已有IAB节点之间的连接关系的更新信息以及这些IAB节点的标识。例如，更新的拓扑信息可以包括连接关系更新的IAB节点的标识，以及这些IAB节点更新后的连接关系。
1404.RAN管理网元向第一IAB宿主发送第一更新响应消息。
相应地，第一IAB宿主(或第一IAB宿主CU或第一IAB宿主CU-CP)接收来自RAN管理网元的第一更新响应消息。
RAN管理网元接收到来自第一IAB宿主的更新请求消息之后，可以向第一IAB宿主发送第一更新响应消息。第一更新响应消息可以为IAB配置更新响应消息(即IAB CONFIGURATIONUPDATE ACKNOWLEDGE/RESPONSE消息)，也可以为其它消息，对它的名称不进行限定。
第一更新响应消息可以携带有第一IAB宿主和/或第一IAB节点的配置信息。步骤902中的请求消息可以为第一更新请求消息。
1405.第一IAB宿主向RAN管理网元发送第一接口释放请求消息。
相应地，RAN管理网元接收来自第一IAB宿主的第一接口释放请求消息。
当第一IAB宿主由于某些原因需要释放第一接口时，可以向RAN管理网元发送第一接口释放请求消息。例如，原因可以为第一IAB宿主所辖范围内不再有任何IAB节点连接到第一IAB宿主，也可以为连接到第一IAB宿主的IAB节点均处于空闲(idle)状态或非激活(inactive)状态。第一接口释放请求消息可以携带有第一IAB宿主的标识，用于请求释放第一IAB宿主与RAN管理网元之间的第一接口，即用于请求拆除第一IAB宿主与RAN管理网元之间的第一接口。第一接口释放请求消息可以是第一IAB宿主下没有激活状态的IAB节点后发送的，也可以是在其它情形下发送的，在此不加限定。
第一接口释放请求消息可以为第一接口release request消息，也可以为其它消息，对它的名称不进行限定。
1406.RAN管理网元向第一IAB宿主发送第一接口释放响应消息。
相应地，第一IAB宿主接收来自RAN管理网元的第一接口释放响应消息。
RAN管理网元接收到来自第一IAB宿主的第一接口释放请求消息之后，可以释放第一IAB宿主与RAN管理网元之间的第一接口，之后可以向第一IAB宿主发送第一接口释放响应消息。
RAN管理网元释放第一IAB宿主与RAN管理网元之间的第一接口，可以理解为RAN管理网元可以移除第一接口上的各种配置信息，以及擦除第一IAB宿主下的所有IAB节点(和终端设备)相关的各种上下文信息。
应理解，第一接口的释放流程也可以由RAN管理网元发起的。此时，步骤1405可以替换为：RAN管理网元向第一IAB宿主发送第一接口释放请求消息。步骤1406可以替换为：第一IAB宿主向RAN管理网元发送第一接口释放响应消息。
RAN管理网元或第一IAB宿主接收到第一接口释放请求消息之后，可能由于还存在相关业务或者在释放请求消息中携带的信息有误或无法正确解析等原因导致无法释放第一接口，此时，会返回第一接口释放失败消息，第一接口释放失败消息可以为Ex RELEASE/REMOVAL FAILURE消息，也可以为其它消息，对它的名称不进行限定。第一接口释放失败消息可以携带有原因值(Cause value)，用于表明释放失败的原因。
应理解，步骤1401-步骤1406中的步骤并不是所有的步骤都必须执行。例如，步骤1403和步骤1404可以执行，也可以不执行。再例如，步骤1405和步骤1406可以执行，也可以不执行。
基于上述网络架构，请参阅图15，图15是本发明实施例公开的又一种通信方法的流程示意图。如图15所示，该通信方法可以包括以下步骤。
RAN管理网元与第一IAB宿主之间建立了第一接口，RAN管理网元与第一IAB宿主(或第一宿主CU或第一宿主CU-CP)之间可以通过第一接口进行通信。RAN管理网元与第一IAB节点之间建立了第二接口，RAN管理网元与第一IAB节点之间可以通过第二接口进行通信。第一IAB宿主与第一IAB节点可以通过无线回传链路连接。详细描述可以参考步骤901上面的 内容。
1501.RAN管理网元确定第一IAB节点的配置信息。
当第一IAB节点需要配置信息时，RAN管理网元可以确定第一IAB节点的配置信息。第一IAB节点的配置信息可以包括第一IAB节点的地址信息、路由信息和小区信息中的一种或多种。第一IAB节点的地址信息可以包括第一IAB节点的BAP层标识和/或IP地址。第一IAB节点的路由信息可以包括第一IAB节点的适配层路由标识和/或路由映射表。第一IAB节点的路由映射表包括第一IAB节点的适配层路由标识和下一跳节点的标识。当第一IAB节点为接入IAB节点时，第一IAB节点的路由信息可以包括适配层路由标识，还可以包括路由映射表。当第一IAB节点为接入IAB节点，且第一IAB节点的路由信息不包括路由映射表时，可以将第一IAB节点的默认或者缺省(default)路由确定为第一IAB节点的路由映射表。当第一IAB节点为中间IAB节点时，第一IAB节点的路由信息包括第一IAB节点的路由映射表。第一IAB节点的小区信息包括为第一IAB节点服务的小区的标识和小区的资源配置。详细描述可以参考步骤901中的相关描述。
1502.RAN管理网元通过第二接口向第一IAB节点发送第一IAB节点的配置信息。
相应地，第一IAB节点通过第二接口接收来自RAN管理网元的第一IAB节点的配置信息。
RAN管理网元确定出第一IAB节点的配置信息之后，可以通过第二接口向第一IAB节点发送第一IAB节点的配置信息。
当第一IAB节点需要配置信息时，可以通过第二接口向RAN管理网元发送第二请求消息，第二请求消息用于请求第一IAB节点的配置信息。RAN管理网元接收来自第一IAB节点的第二请求消息，可以响应于第二请求消息，通过第二接口向所述第一IAB节点发送所述配置信息。第一IAB节点的配置信息可以是RAN管理网元接收到第二请求消息之前确定的，也可以是RAN管理网元接收到第二请求消息之后响应于第二请求消息确定的。
第二请求消息可以包括第一IAB节点的标识。当第一IAB节点的配置信息是RAN管理网元接收到第二请求消息之前确定的时，RAN管理网元接收到第二请求消息之后，可以响应于第二请求消息，向第一IAB节点发送第一IAB节点的配置信息。当第一IAB节点的配置信息是RAN管理网元接收到第二请求消息之后确定的时，第一IAB节点的地址信息可以包括一个BAP层标识和/或一个IP地址。当RAN管理网元通过其它方式获取到第一IAB节点所需地址的数量时，RAN管理网元可以根据第一IAB节点所需地址的数量确定第一IAB节点的地址信息。
第二请求消息可以包括第一IAB节点所需地址的数量以及第一IAB节点的标识。RAN管理网元接收到第二请求消息之后，可以响应于第二请求消息，先根据第一IAB节点所需地址的数量确定第一IAB节点的地址信息，之后通过第二接口向第一IAB节点发送第一IAB节点的配置信息。
第二请求消息可以包括第二拓扑信息，第二拓扑信息可以包括第一IAB节点与第一IAB节点的父节点和/或子节点之间的连接关系。本申请中，第一IAB节点与第一IAB节点的父节点和/或子节点之间的连接关系可以包括第一IAB节点连接的一个或多个父节点的标识，第一IAB节点连接的一个或多个子节点的标识。第一IAB节点与第一IAB节点的父节点和/或子节点之间的连接关系还可以包括连接到第一IAB节点的一个或多个终端设备的标识，第一IAB节点经过一段或多段无线回传链路所连接到的IAB宿主(或IAB宿主DU)的标识等。第二拓扑信息也可以包括新增的IAB节点的标识，以及新增的IAB节点与已有IAB节点之间的连接关系。
第二请求消息可以包括为第一IAB节点服务的小区的标识。
第二请求消息可以包括第一IAB节点的标识(或第一IAB节点所需地址的数量以及第一 IAB节点的标识)、第二拓扑信息和为第一IAB节点服务的小区的标识中的任两者或三者都包含。
1503.第一IAB节点获取第一IAB节点的地址信息、路由信息和小区信息中的一种或多种。
第一IAB节点通过第二接口接收到来自RAN管理网元的第一IAB节点的配置信息之后，可以获取第一IAB节点的地址信息、路由信息和小区信息中的一种或多种。详细描述可以参考步骤903下面第一IAB节点的相关描述。
1504.RAN管理网元通过第一接口向第一IAB宿主发送第一IAB节点的配置信息。
RAN管理网元确定出第一IAB节点的配置信息之后，可以通过第一接口向第一IAB宿主发送第一IAB节点的配置信息。第一IAB宿主接收到来自RAN管理网元的第一IAB节点的配置信息之后，可以获取第一IAB节点的地址信息、路由信息和小区信息中的一种或多种，存储第一IAB节点的地址信息、路由信息和小区信息中的一种或多种，以便后续对数据或信令进行传输。
可见，第一IAB节点可以直接通过第二接口与RAN管理网元进行通信，可以不经过第一IAB宿主。但RAN管理网元仍然可以将第一IAB宿主管理的所有IAB节点的配置信息发送给第一IAB宿主，以便可以保证数据的正常传输。
当第一IAB宿主的CU和DU分离时，RAN管理网元可以通过第一接口向第一IAB宿主CU(或第一IAB宿主CU-CP)发送第一IAB节点的配置信息。
此外，RAN管理网元还可以确定第一IAB宿主的配置信息，即为第一IAB宿主配置的配置信息，之后可以通过第一接口向第一IAB宿主发送第一IAB宿主的配置信息。第一IAB宿主的配置信息可以包括第一IAB宿主的地址信息、路由信息和小区信息中的一种或多种。相应地，第一IAB宿主可以通过第一接口接收来自RAN管理网元的第一IAB宿主的配置信息，之后可以获取第一IAB宿主的地址信息、路由信息和小区信息中的一种或多种，存储第一IAB宿主的地址信息、路由信息和小区信息中的一种或多种，以便后续对数据或信令进行传输。详细描述可以参考步骤901。
类似地，当第一IAB宿主需要配置信息时，可以通过第一接口向RAN管理网元发送第一请求消息，第一请求消息用于请求第一IAB宿主的配置信息。RAN管理网元接收来自第一IAB宿主的第一请求消息，可以响应于第一请求消息，通过第一接口向第一IAB宿主发送第一IAB宿主的配置信息。第一IAB宿主的配置信息可以是RAN管理网元接收到第一请求消息之前确定的，也可以是RAN管理网元接收到第一请求消息之后响应于第一请求消息确定的。
第一请求消息可以包括第一IAB宿主的标识。第一请求消息可以包括第一IAB宿主所需地址的数量以及第一IAB宿主的标识。第一请求消息可以包括第一拓扑信息，第一拓扑信息可以包括第一IAB宿主与IAB节点之间的连接关系。第一请求消息可以包括为第一IAB宿主服务的小区的标识。第一请求消息可以包括第一IAB宿主的标识(或第一IAB宿主所需地址的数量以及第一IAB宿主的标识)、第一拓扑信息和为第一IAB宿主服务的小区的标识中的任两者或三者都包含。
当第一IAB宿主的CU和DU分离时，RAN管理网元确定的是第一IAB宿主DU的配置信息，RAN管理网元可以通过第三接口向第一IAB宿主DU发送第一IAB宿主DU的配置信息。相应地，第一IAB宿主DU可以通过第三接口接收来自RAN管理网元的第一IAB宿主DU的配置信息，之后可以获取第一IAB宿主DU的地址信息、路由信息和小区信息中的一种或多种，存储第一IAB宿主DU的地址信息、路由信息和小区信息中的一种或多种，以便后续对数据或信令进行传输。此外，RAN管理网元还可以通过第一接口向第一IAB宿主CU(或第一IAB宿主CU-CP)发送 第一IAB宿主DU的配置信息。相应地，第一IAB宿主CU(或第一IAB宿主CU-CP)可以通过第一接口接收来自RAN管理网元的第一IAB宿主DU的配置信息，之后可以获取第一IAB宿主DU的地址信息、路由信息和小区信息中的一种或多种，存储第一IAB宿主DU的地址信息、路由信息和小区信息中的一种或多种，以便后续对数据或信令进行传输。
当第一IAB宿主DU需要配置信息时，可以通过第三接口向RAN管理网元发送第一请求消息，第一请求消息用于请求第一IAB宿主DU的配置信息。RAN管理网元接收来自第一IAB宿主DU的第一请求消息，可以响应于第一请求消息，通过第三接口向第一IAB宿主发送第一IAB宿主DU的配置信息。第一IAB宿主DU的配置信息可以是RAN管理网元接收到第一请求消息之前确定的，也可以是RAN管理网元接收到第一请求消息之后响应于第一请求消息确定的。
第一请求消息可以包括第一IAB宿主DU的标识(或第一IAB宿主DU所需地址的数量以及第一IAB宿主DU的标识)、第一拓扑信息和为第一IAB宿主DU服务的小区的标识中的一个或多个。第一拓扑信息可以包括第一IAB宿主DU与IAB节点之间的连接关系。
应理解，第一接口与第二接口为不同的接口。第一接口与第三接口为不同的接口。第二接口与第三接口可以相同，也可以不同。
基于上述网络架构，请参阅图16，图16是本发明实施例公开的又一种通信方法的流程示意图。如图16所示，该通信方法可以包括以下步骤。
第一IAB宿主与RAN管理网元之间通过第一接口进行通信。第一IAB节点与RAN管理网元之间通过第二接口进行通信。其中，图16适用于第一IAB宿主的DU和CU不分离的场景。
1601.第一IAB宿主向RAN管理网元发送第一接口建立请求消息。
相应地，RAN管理网元接收来自第一IAB宿主的第一接口建立请求消息。
第一IAB宿主需要对第一IAB宿主管理的IAB节点提供服务时，为了保证数据的正常传输，可以先向RAN管理网元发送第一接口建立请求消息。第一接口建立请求消息用于请求建立第一接口。第一接口建立请求消息可以携带有第一IAB宿主的标识、拓扑信息和为第一IAB宿主服务的小区的标识中的一个或多个。拓扑信息和第一接口建立请求消息的详细描述可以参考步骤1401。其中，步骤1504中的第一请求消息可以为第一接口建立请求消息。
1602.RAN管理网元向第一IAB宿主发送第一接口建立响应消息。
其中，步骤1602的详细描述可以参考步骤1402。区别在于：第一接口建立响应消息携带的配置信息为第一IAB宿主的配置信息。
1603.第一IAB宿主通过第一接口向RAN管理网元发送第一更新请求消息。
当与第一IAB宿主连接的节点发生变化时，若需要对第一IAB宿主的配置信息进行调整，第一IAB宿主可以通过第一接口向RAN管理网元发送第一更新请求消息。其它描述可以参考步骤1403。与第一IAB宿主连接的节点发生变化，可以为新增了与第一IAB宿主连接的节点，也可以为减少了与第一IAB宿主连接的节点。步骤1504中的第一请求消息可以为第一接口更新请求消息。
1604.RAN管理网元向第一IAB宿主发送第一更新响应消息。
其中，步骤1604的详细描述可以参考步骤1404。区别在于：第一接口更新响应消息携带的配置信息为第一IAB宿主的配置信息。
1605.第一IAB节点向RAN管理网元发送第二接口建立请求消息。
相应地，RAN管理网元接收来自第一IAB节点的第二接口建立请求消息。
当第一IAB节点需要与第一IAB宿主进行通信时，可以先向RAN管理网元发送第二接口建 立请求消息。第二接口建立请求消息用于请求建立第二接口。第二接口建立请求消息可以为第二接口setup request消息，也可以为其它消息，对它的名称不进行限定。
第二接口建立请求消息可以携带有第一IAB节点的标识、拓扑信息和为第一IAB节点服务的小区的标识中的一个或多个。拓扑信息可以包括与第一IAB节点连接的其它节点的标识，具体可参考步骤1502中的第二拓扑信息的描述进行理解。步骤1502下面的第二请求消息可以为第二接口建立请求消息。
1606.RAN管理网元向第一IAB节点发送第二接口建立响应消息。
相应地，第一IAB节点接收来自RAN管理网元的第二接口建立响应消息。
RAN管理网元接收到来自第一IAB节点的第二接口建立请求消息之后，可以向第一IAB节点发送第二接口建立响应消息。第一IAB节点接收到来自RAN管理网元的第二接口建立响应消息之后，表明第一IAB节点与RAN管理网元之间的第二接口建立完成，第一IAB节点与RAN管理网元之间可以通过第二接口进行通信。第二接口建立响应消息可以为第二接口setup response消息，也可以为第二接口setup response消息，还可以为其它消息，对它的名称不进行限定。第二接口可以为Ey接口，也可以为其它接口，对它的名称不进行限定。第二接口建立响应消息可以携带有第一IAB节点的配置信息。
1607.第一IAB节点通过第二接口向RAN管理网元发送第二更新请求消息。
相应地，RAN管理网元接收来自第一IAB节点的第二更新请求消息。
当第一IAB节点连接的节点的网络拓扑发生变化时，若需要对第一IAB节点的配置信息进行调整，第一IAB节点可以通过第二接口向RAN管理网元发送第二更新请求消息，即向RAN管理网元发起IAB配置更新流程。第二更新请求消息用于获取第一IAB节点更新的配置信息。第二更新请求消息可以为IAB配置更新请求消息(即IAB CONFIGURATIONUPDATE REQUEST消息)，也可以为其它消息，对它的名称不进行限定。
第二更新请求消息可以携带有第一IAB节点更新的拓扑信息。更新的拓扑信息可以包括与第一IAB节点连接的节点的标识以及连接关系。步骤1502下面的第二请求消息可以为第二接口更新请求消息。
1608.RAN管理网元向第一IAB节点发送第二更新响应消息。
相应地，第一IAB节点接收来自RAN管理网元的第二更新响应消息。
RAN管理网元接收到来自第一IAB节点的第二更新请求消息之后，可以向第一IAB节点发送第二更新响应消息。第二更新响应消息可以为IAB配置更新响应消息(即IAB CONFIGURATIONUPDATE ACKNOWLEDGE/RESPONSE消息)，也可以为其它消息，对它的名称不进行限定。
第二更新响应消息可以携带有第一IAB节点的配置信息。
1609.第一IAB宿主向RAN管理网元发送第一接口释放请求消息。
其中，步骤1609的详细描述可以参考步骤1405。
1610.RAN管理网元向第一IAB宿主发送第一接口释放响应消息。
其中，步骤1610的详细描述可以参考步骤1406。
1611.第一IAB节点向RAN管理网元发送第二接口释放请求消息。
相应地，RAN管理网元接收来自第一IAB节点的第二接口释放请求消息。
当第一IAB节点由于某些原因需要释放第二接口时，可以向RAN管理网元发送第二接口释放请求消息。第二释放请求消息可以携带有第一IAB节点的标识，用于请求释放第一IAB节点与RAN管理网元之间的第二接口，即用于请求拆除第一IAB节点与RAN管理网元之间的第 二接口。第二接口释放请求消息可以为第二接口release request消息，也可以为其它消息，对它的名称不进行限定。
1612.RAN管理网元向第一IAB节点发送第二接口释放响应消息。
相应地，第一IAB节点接收来自RAN管理网元的第二接口释放响应消息。
RAN管理网元接收到来自第一IAB节点的第二接口释放请求消息之后，可以释放第一IAB节点与RAN管理网元之间的第二接口，之后可以向第一IAB节点发送第二接口释放响应消息。
RAN管理网元释放第一IAB节点与RAN管理网元之间的第二接口，可以理解为RAN管理网元可以移除第二接口上的各种配置信息，以及擦除第一IAB节点相关的各种上下文信息。
应理解，第二接口的释放流程也可以由RAN管理网元发起的。此时，步骤1611可以替换为：RAN管理网元向第一IAB节点发送第二接口释放请求消息。步骤1612可以替换为：第一IAB节点向RAN管理网元发送第二接口释放响应消息。
应理解，步骤1601-步骤1612中的步骤并不是所有的步骤都必须执行。例如，步骤1603和步骤1604可以执行，也可以不执行。再例如，步骤1609和步骤1610可以执行，也可以不执行。步骤1607和步骤1608可以执行，也可以不执行。再例如，步骤1611和步骤1612可以执行，也可以不执行。
应理解，步骤1601-步骤1612中的执行顺序可以调整。例如，步骤1605-步骤1606可以在步骤1603和步骤1604之前执行。
基于上述网络架构，请参阅图17，图17是本发明实施例公开的又一种通信方法的流程示意图。如图17所示，该通信方法可以包括以下步骤。
第一IAB宿主CU(或第一IAB宿主CU-CP)与RAN管理网元之间通过第一接口进行通信。第一IAB节点与RAN管理网元之间通过第二接口进行通信。第一IAB宿主DU与RAN管理网元之间通过第三接口进行通信。
1701.第一IAB宿主CU(或第一IAB宿主CU-CP)向RAN管理网元发送第一接口建立请求消息。
相应地，RAN管理网元接收来自第一IAB宿主CU(或第一IAB宿主CU-CP)的第一接口建立请求消息。
第一IAB宿主CU(或第一IAB宿主CU-CP)需要对第一IAB宿主CU(或第一IAB宿主CU-CP)管理的节点提供服务时，为了保证数据的正常传输，可以先向RAN管理网元发送第一接口建立请求消息。第一接口建立请求消息用于请求建立第一接口。第一接口建立请求消息可以携带有第一IAB宿主CU(或第一IAB宿主CU-CP)的标识。第一IAB宿主CU(或第一IAB宿主CU-CP)管理的节点可以包括IAB节点和终端设备，还可以包括第一IAB宿主DU。
1702.RAN管理网元向第一IAB宿主CU(或第一IAB宿主CU-CP)发送第一接口建立响应消息。
相应地，第一IAB宿主CU(或第一IAB宿主CU-CP)接收来自RAN管理网元的第一接口建立响应消息。
RAN管理网元接收到来自第一IAB宿主CU(或第一IAB宿主CU-CP)的第一接口建立请求消息之后，可以向第一IAB宿主CU(或第一IAB宿主CU-CP)发送第一接口建立响应消息。第一IAB宿主CU(或第一IAB宿主CU-CP)接收到来自RAN管理网元的第一接口建立响应消息之后，表明第一IAB宿主CU(或第一IAB宿主CU-CP)与RAN管理网元之间的第一接口建立完成，第一IAB宿主CU(或第一IAB宿主CU-CP)与RAN管理网元之间可以通过第一接口 进行通信。
1703.第一IAB节点向RAN管理网元发送第二接口建立请求消息。
其中，步骤1703的详细描述可以参考步骤1605。
1704.RAN管理网元向第一IAB节点发送第二接口建立响应消息。
其中，步骤1704的详细描述可以参考步骤1606。
1705.第一IAB宿主DU向RAN管理网元发送第三接口建立请求消息。
相应地，RAN管理网元接收来自第一IAB宿主DU的第三接口建立请求消息。
当第一IAB宿主DU需要与第一IAB宿主CU(或第一IAB宿主CU-CP)进行通信时，第一IAB宿主DU可以先向RAN管理网元发送第三接口建立请求消息。第三接口建立请求消息用于请求建立第三接口。第三接口建立请求消息可以携带有第一IAB宿主DU的标识、拓扑信息和为第一IAB宿主DU服务的小区的标识中的一个或多个。拓扑信息可以包括与第一IAB宿主DU连接的其它节点的标识。与第一IAB宿主DU连接的其它节点可以包括IAB节点和第一IAB宿主CU(或第一IAB宿主CU-CP)。步骤1504中的第一请求消息可以为第三接口建立请求消息。
1706.RAN管理网元向第一IAB宿主DU发送第三接口建立响应消息。
相应地，第一IAB宿主DU接收来自RAN管理网元的第三接口建立响应消息。
RAN管理网元接收到来自第一IAB宿主DU的第三接口建立请求消息之后，可以向第一IAB宿主DU发送第三接口建立响应消息。第一IAB宿主DU接收到来自RAN管理网元的第三接口建立响应消息之后，表明第一IAB宿主DU与RAN管理网元之间的第三接口建立完成，第一IAB宿主DU与RAN管理网元之间可以通过第三接口进行通信。第三接口建立响应消息可以携带有第一IAB宿主DU的配置信息。
1707.第一IAB宿主DU通过第三接口向RAN管理网元发送第一更新请求消息。
相应地，RAN管理网元接收来自第一IAB宿主DU的第一更新请求消息。
当第一IAB宿主DU连接的节点的网络拓扑发生变化时，若需要对第一IAB宿主DU的配置信息进行调整，第一IAB宿主DU可以通过第三接口向RAN管理网元发送第一更新请求消息，即向RAN管理网元发起IAB配置更新流程。第一更新请求消息用于获取第一IAB宿主DU更新的配置信息。第一更新请求消息可以为宿主DU配置更新请求消息(即IAB donor DU CONFIGURATIONUPDATE REQUEST消息)，也可以为其它消息，对它的名称不进行限定。
第一更新请求消息可以携带有第一IAB宿主DU更新的拓扑信息。更新的拓扑信息可以包括与第一IAB宿主DU连接的节点的标识以及连接关系。与第一IAB宿主DU连接的节点可以参考步骤1705的与第一IAB宿主DU连接的其它节点。步骤1504中的第一请求消息可以为第一更新请求消息。
1708.RAN管理网元向第一IAB宿主DU发送第一更新响应消息。
相应地，第一IAB宿主DU接收来自RAN管理网元的第一更新响应消息。
RAN管理网元接收到来自第一IAB宿主DU的第一更新请求消息之后，可以向第一IAB宿主DU发送第一更新响应消息。第一更新响应消息可以为宿主DU配置更新响应消息(即IABdonor DU CONFIGURATIONUPDATE ACKNOWLEDGE/RESPONSE消息)，也可以为其它消息，对它的名称不进行限定。
1709.第一IAB节点通过第二接口向RAN管理网元发送第二更新请求消息。
其中，步骤1709的详细描述可以参考步骤1607。
1710.RAN管理网元向第一IAB节点发送第二更新响应消息。
其中，步骤1710的详细描述可以参考步骤1608。
1711.第一IAB宿主CU(或第一IAB宿主CU-CP)向RAN管理网元发送第一接口释放请求消息。
其中，步骤1711的详细描述可以参考步骤1609。
1712.RAN管理网元向第一IAB宿主CU(或第一IAB宿主CU-CP)发送第一接口释放响应消息。
其中，步骤1712的详细描述可以参考步骤1610。
1713.第一IAB节点向RAN管理网元发送第二接口释放请求消息。
其中，步骤1713的详细描述可以参考步骤1611。
1714.RAN管理网元向第一IAB节点发送第二接口释放响应消息。
其中，步骤1714的详细描述可以参考步骤1612。
1715.第一IAB宿主DU向RAN管理网元发送第三接口释放请求消息。
相应地，RAN管理网元接收来自第一IAB宿主DU的第三接口释放请求消息。
当第一IAB宿主DU由于某些原因需要释放第三接口时，可以向RAN管理网元发送第三接口释放请求消息。第三释放请求消息可以携带有第一IAB宿主DU的标识，用于请求释放第一IAB宿主DU与RAN管理网元之间的第三接口，即用于请求拆除第一IAB宿主DU与RAN管理网元之间的第三接口。第三接口释放请求消息可以为第三接口release request消息，也可以为其它消息，对它的名称不进行限定。
1716.RAN管理网元向第一IAB宿主DU发送第三接口释放响应消息。
相应地，第一IAB宿主DU接收来自RAN管理网元的第三接口释放响应消息。
RAN管理网元接收到来自第一IAB宿主DU的第三接口释放请求消息之后，可以释放第一IAB宿主DU与RAN管理网元之间的第三接口，之后可以向第一IAB宿主DU发送第三接口释放响应消息。
RAN管理网元释放第一IAB宿主DU与RAN管理网元之间的第三接口，可以理解为RAN管理网元可以移除第三接口上的各种配置信息，以及擦除第一IAB宿主DU相关的各种上下文信息。
应理解，第三接口的释放流程也可以由RAN管理网元发起的。此时，步骤1715可以替换为：RAN管理网元向第一IAB宿主DU发送第三接口释放请求消息。步骤1716可以替换为：第一IAB宿主DU向RAN管理网元发送第三接口释放响应消息。
应理解，步骤1701-步骤1716中的步骤并不是所有的步骤都必须执行。例如，步骤1707和步骤1708可以执行，也可以不执行。再例如，步骤1709和步骤1710可以执行，也可以不执行。步骤1711和步骤1712可以执行，也可以不执行。再例如，步骤1713和步骤1714可以执行，也可以不执行。再例如，步骤1715和步骤1716可以执行，也可以不执行。
应理解，步骤1701-步骤1716中的执行顺序可以调整。例如，步骤1715-步骤1716可以在步骤1713和步骤1714之前执行。
应理解，当第一IAB宿主包括第一IAB宿主DU和第一IAB宿主CU时，第一IAB宿主与RAN管理网元之间通过第一接口的通信，可以理解为第一IAB宿主CU与RAN管理网元之间通过第一接口的通信。
应理解，当第一IAB宿主包括第一宿主DU、第一宿主CU-CP和第一宿主CU-UP时，第一IAB宿主与RAN管理网元之间通过第一接口的通信，可以理解为第一IAB宿主CU-CP与RAN管理网元之间通过第一接口的通信。
应理解，上述通信方法中由RAN管理网元执行的功能也可以由RAN管理网元中的模块(例如，芯片)来执行，由第一IAB宿主执行的功能也可以由第一IAB宿主中的模块(例如，芯片)来执行，由第一IAB节点执行的功能也可以由第一IAB节点中的模块(例如，芯片)来执行。
应理解，上述不同实施例中相关信息(即相同信息或相似信息)可以相互参考。
基于上述网络架构，请参阅图18，图18是本发明实施例公开的一种通信装置的结构示意图。如图18所示，该通信装置可以包括确定单元1801和发送单元1802。该RAN管理网元还可以包括接收单元1803。
在一种情况下，该通信装置可以为RAN管理网元，RAN管理网元可以通过第一接口连接第一IAB宿主，第一IAB宿主与第一IAB节点通过无线回传链路连接。其中：
确定单元1801，用于确定第一IAB宿主和/或第一IAB节点的配置信息，该配置信息包括地址信息、路由信息和小区信息中的一种或多种；
发送单元1802，用于向第一IAB宿主发送该配置信息。
在一个实施例中，接收单元1803，用于接收来自第一IAB宿主的请求消息；
发送单元1802，具体用于响应于该请求消息，向第一IAB宿主发送该配置信息。
在一个实施例中，该地址信息包括BAP层标识和/或IP地址。
在一个实施例中，该路由信息包括适配层路由标识和/或路由映射表，路由映射表包括适配层路由标识和下一跳节点的标识。
在一个实施例中，该小区信息包括小区的标识和小区的资源配置。
在一个实施例中，小区的资源配置包括小区的频点信息、小区的带宽信息、小区的上下行双工模式中的一种或多种。
在一个实施例中，该请求消息包括第一IAB节点和/或第一IAB宿主所需地址的数量，以及第一IAB节点和/或第一IAB宿主的标识。
在一个实施例中，该请求消息包括拓扑信息，拓扑信息包括第一IAB宿主和/或第一IAB节点与其它节点之间的连接关系。
在一个实施例中，该请求消息包括为第一IAB宿主和/或第一IAB节点服务的小区的标识。
在一个实施例中，该请求消息为第一接口建立请求消息或IAB配置更新请求消息。
有关上述确定单元1801、发送单元1802和接收单元1803更详细的描述可以直接参考上述图9-图14所示的方法实施例中RAN管理网元的相关描述直接得到，这里不加赘述。
在另一种情况下，该通信装置可以为RAN管理网元，RAN管理网元通过第一接口连接第一IAB宿主，RAN管理网元通过第二接口连接第一IAB节点，第一IAB宿主与第一IAB节点通过无线回传链路连接。其中：
确定单元1801，用于确定第一IAB节点的配置信息，第一IAB节点的配置信息包括地址信息、路由信息和小区信息中的一种或多种；
发送单元1802，用于通过第二接口向第一IAB节点发送第一IAB节点的配置信息。
在一个实施例中，发送单元1802，还用于通过第一接口向第一IAB宿主发送第一IAB节点的配置信息。
在一个实施例中，确定单元1801，还用于确定第一IAB宿主的配置信息；
发送单元1802，还用于通过第一接口向第一IAB宿主发送第一IAB宿主的配置信息。
在一个实施例中，第一IAB节点的地址信息包括BAP层标识和/或IP地址。
在一个实施例中，第一IAB节点的路由信息包括适配层路由标识和/或路由映射表，路由映射表包括适配层路由标识和下一跳节点的标识。
在一个实施例中，第一IAB节点的小区信息包括小区的标识和小区的资源配置。
在一个实施例中，小区的资源配置包括小区的频点信息、小区的带宽信息、小区的上下行双工模式中的一种或多种。
在一个实施例中，接收单元1803，用于接收来自第一IAB宿主的第一请求消息；
发送单元1802通过第一接口向第一IAB宿主发送第一IAB宿主的配置信息包括：
响应于第一请求消息，通过第一接口向第一IAB宿主发送第一IAB宿主的配置信息。
在一个实施例中，第一请求消息包括第一IAB宿主所需地址的数量以及第一IAB宿主的标识。
在一个实施例中，第一请求消息包括第一拓扑信息，第一拓扑信息包括第一IAB宿主与IAB节点之间的连接关系。
在一个实施例中，第一请求消息包括为第一IAB宿主服务的小区的标识。
在一个实施例中，第一请求消息为第一接口建立请求消息或IAB配置更新请求消息。
在一个实施例中，接收单元1803，还用于接收来自第一IAB节点的第二请求消息；
发送单元1802通过第二接口向第一IAB节点发送配置信息包括：
响应于第二请求消息，通过第二接口向第一IAB节点发送该配置信息。
在一个实施例中，第二请求消息包括第一IAB节点所需地址的数量以及第一IAB节点的标识。
在一个实施例中，第二请求消息包括第二拓扑信息，第二拓扑信息包括第一IAB节点与第一IAB节点的父节点和/或子节点之间的连接关系。
在一个实施例中，第二请求消息包括为第一IAB节点服务的小区的标识。
在一个实施例中，第二请求消息为第二接口建立请求消息或IAB配置更新请求消息。
有关上述确定单元1801、发送单元1802和接收单元1803更详细的描述可以直接参考上述图15-图17所示的方法实施例中RAN管理网元的相关描述直接得到，这里不加赘述。
基于上述网络架构，请参阅图19，图19是本发明实施例公开的另一种通信装置的结构示意图。如图19所示，该通信装置可以包括接收单元1901和获取单元1902，该通信装置还可以包括发送单元1903。
在一种情况下，该通信装置可以为第一IAB宿主，第一IAB宿主通过第一接口连接RAN管理网元，第一IAB宿主与第一IAB节点通过无线回传链路连接。其中：
接收单元1901，用于通过第一接口接收来自RAN管理网元的第一IAB宿主和/或第一IAB节点的配置信息，该配置信息包括地址信息、路由信息和小区信息中的一种或多种；
获取单元1902，用于获取地址信息、路由信息和小区信息中的一种或多种。
在一个实施例中，发送单元1903，用于向RAN管理网元发送请求消息，请求消息用于请求该配置信息。
在一个实施例中，发送单元1903，还用于向第一IAB节点发送第一IAB节点的配置信息。
在一个实施例中，地址信息包括BAP层标识和/或IP地址。
在一个实施例中，路由信息包括适配层路由标识和/或路由映射表，路由映射表包括适配层路由标识和下一跳节点的标识。
在一个实施例中，小区信息包括小区的标识和小区的资源配置。
在一个实施例中，小区的资源配置包括小区的频点信息、小区的带宽信息、小区的上下行双工模式中的一种或多种。
在一个实施例中，请求消息包括第一IAB节点和/或第一IAB宿主所需地址的数量，以及第一IAB节点和/或第一IAB宿主的标识。
在一个实施例中，请求消息包括拓扑信息，拓扑信息包括第一IAB宿主和/或第一IAB节点与其它节点之间的连接关系。
在一个实施例中，请求消息包括为第一IAB宿主和/或第一IAB节点服务的小区的标识。
在一个实施例中，请求消息为第一接口建立请求消息或IAB配置更新请求消息。
有关上述接收单元1901、获取单元1902和发送单元1903更详细的描述可以直接参考上述图9-图14所示的方法实施例中第一IAB宿主的相关描述直接得到，这里不加赘述。
在另一种情况下，该通信装置可以为第一IAB节点，第一IAB节点与第一IAB宿主通过无线回传链路连接，第一IAB节点通过第二接口连接无线接入网RAN管理网元。其中：
接收单元1901，用于通过第二接口接收来自所述RAN管理网元的第一IAB节点的配置信息，该配置信息包括地址信息、路由信息和小区信息中的一种或多种；
获取单元1902，用于获取地址信息、路由信息和小区信息中的一种或多种。
在一个实施例中，地址信息包括BAP层标识和/或IP地址。
在一个实施例中，路由信息包括适配层路由标识和/或路由映射表，路由映射表包括适配层路由标识和下一跳节点的标识。
在一个实施例中，小区信息包括小区的标识和小区的资源配置。
在一个实施例中，小区的资源配置包括小区的频点信息、小区的带宽信息、小区的上下行双工模式中的一种或多种。
在一个实施例中，发送单元1903，用于通过第二接口向RAN管理网元发送第二请求消息，第二请求消息用于请求该配置信息。
在一个实施例中，第二请求消息包括第一IAB节点所需地址的数量以及第一IAB节点的标识。
在一个实施例中，第二请求消息包括第二拓扑信息，第二拓扑信息包括第一IAB节点与第一IAB节点的父节点和/或子节点之间的连接关系。
在一个实施例中，第二请求消息包括为第一IAB节点服务的小区的标识。
在一个实施例中，第二请求消息为第二接口建立请求消息或IAB配置更新请求消息。
有关上述接收单元1901、获取单元1902和发送单元1903更详细的描述可以直接参考上述图15-图17所示的方法实施例中第一IAB节点的相关描述直接得到，这里不加赘述。
基于上述网络架构，请参阅图20，图20是本发明实施例公开的又一种通信装置的结构示意图。如图20所示，该通信装置可以包括处理器2001、存储器2002、输入接口2003、输出接口2004和总线2005。存储器2002可以是独立存在的，可以通过总线2005与处理器2001相连接。存储器2002也可以和处理器2001集成在一起。其中，总线2005用于实现这些组件之间的连接。
在一个实施例中，该通信装置可以为RAN管理网元，存储器2002中存储的计算机程序指令被执行时，该处理器2001用于控制接收单元1803和发送单元1802执行上述实施例中执行的操作，该处理器2001还用于确定单元1801执行上述实施例中执行的操作，输入接口2003用于 执行上述实施例中接收单元1803执行的操作，输出接口2004用于执行上述实施例中发送单元1802执行的操作。上述RAN管理网元还可以用于执行上述图9-图14，或者图15-图17方法实施例中RAN管理网元执行的各种方法，不再赘述。
在一个实施例中，该通信装置可以为第一IAB宿主，存储器2002中存储的计算机程序指令被执行时，该处理器2001用于控制接收单元1901和发送单元1903执行上述实施例中执行的操作，该处理器2001还用于获取单元1902执行上述实施例中执行的操作，输入接口2003用于执行上述实施例中接收单元1901执行的操作，输出接口2004用于执行上述实施例中发送单元1903执行的操作。上述第一IAB宿主还可以用于执行上述图9-图14方法实施例中第一IAB宿主执行的各种方法，不再赘述。
在一个实施例中，该通信装置可以为第一IAB节点，存储器2002中存储的计算机程序指令被执行时，该处理器2001用于控制接收单元1901和发送单元1903执行上述实施例中执行的操作，该处理器2001还用于获取单元1902执行上述实施例中执行的操作，输入接口2003用于执行上述实施例中接收单元1901执行的操作，输出接口2004用于执行上述实施例中发送单元1903执行的操作。上述第一IAB节点还可以用于执行上述图15-图17方法实施例中第一IAB节点执行的各种方法，不再赘述。
基于上述网络架构，请参阅图21，图21是本发明实施例公开的又一种通信装置的结构示意图。如图21所示，该通信装置可以包括输入接口2101、逻辑电路2102和输出接口2103。输入接口2101与输出接口2103通过逻辑电路2102相连接。其中，输入接口2101用于接收来自其它通信装置的信息，输出接口2103用于向其它通信装置输出、调度或者发送信息。逻辑电路2102用于执行除输入接口2101与输出接口2103的操作之外的操作，例如实现上述实施例中处理器2001实现的功能。其中，该通信装置可以为RAN管理网元，也可以为第一IAB宿主，还可以为第一IAB节点。其中，有关输入接口2101、逻辑电路2102和输出接口2103更详细的描述可以直接参考上述方法实施例中RAN管理网元、第一IAB宿主或第一IAB节点的相关描述直接得到，这里不加赘述。
本发明实施例还公开一种计算机可读存储介质，其上存储有指令，该指令被执行时执行上述方法实施例中的方法。
本发明实施例还公开一种包括指令的计算机程序产品，该指令被执行时执行上述方法实施例中的方法。
本发明实施例还公开一种通信系统，该通信系统可以包括RAN管理网元、第一IAB宿主和第一IAB节点等，具体描述可以参考图9-图16所示的通信方法。
以上所述的具体实施方式，对本申请的目的、技术方案和有益效果进行了进一步详细说明，所应理解的是，以上所述仅为本申请的具体实施方式而已，并不用于限定本申请的保护范围，凡在本申请的技术方案的基础之上，所做的任何修改、等同替换、改进等，均应包括在本申请的保护范围之内。

Claims (59)

  1. 一种通信方法，其特征在于，所述方法应用于无线接入网RAN管理网元，所述RAN管理网元通过第一接口连接第一接入回传一体化IAB宿主，所述第一IAB宿主与第一IAB节点通过无线回传链路连接，包括：
    确定所述第一IAB宿主和/或所述第一IAB节点的配置信息，所述配置信息包括地址信息、路由信息和小区信息中的一种或多种；
    向所述第一IAB宿主发送所述配置信息。
  2. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    接收来自所述第一IAB宿主的请求消息；
    所述向所述第一IAB宿主发送所述配置信息包括：
    响应于所述请求消息，向所述第一IAB宿主发送所述配置信息。
  3. 一种通信方法，其特征在于，所述方法应用于第一接入回传一体化IAB宿主，所述第一IAB宿主通过第一接口连接无线接入网RAN管理网元，所述第一IAB宿主与第一IAB节点通过无线回传链路连接，包括：
    通过所述第一接口接收来自所述RAN管理网元的所述第一IAB宿主和/或所述第一IAB节点的配置信息，所述配置信息包括地址信息、路由信息和小区信息中的一种或多种；
    获取所述地址信息、所述路由信息和所述小区信息中的一种或多种。
  4. 根据权利要求3所述的方法，其特征在于，所述方法还包括：
    向所述RAN管理网元发送请求消息，所述请求消息用于请求所述配置信息。
  5. 根据权利要求3或4所述的方法，其特征在于，所述方法还包括：
    向所述第一IAB节点发送所述第一IAB节点的配置信息。
  6. 根据权利要求1-5任一项所述的方法，其特征在于，所述地址信息包括回传适配协议BAP层标识和/或网络互连协议IP地址。
  7. 根据权利要求1-6任一项所述的方法，其特征在于，所述路由信息包括适配层路由标识和/或路由映射表，所述路由映射表包括所述适配层路由标识和下一跳节点的标识。
  8. 根据权利要求1-7任一项所述的方法，其特征在于，所述小区信息包括小区的标识和小区的资源配置。
  9. 根据权利要求8所述的方法，其特征在于，所述小区的资源配置包括小区的频点信息、小区的带宽信息、小区的上下行双工模式中的一种或多种。
  10. 根据权利要求2，或者权利要求4-9中任一项所述的方法，其特征在于，所述请求消息包括所述第一IAB节点和/或所述第一IAB宿主所需地址的数量，以及所述第一IAB节点和/或所述第一IAB宿主的标识。
  11. 根据权利要求2，或者权利要求4-10中任一项所述的方法，其特征在于，所述请求消息包括拓扑信息，所述拓扑信息包括所述第一IAB宿主和/或所述第一IAB节点与其它节点之间的连接关系。
  12. 根据权利要求2，或者权利要求4-11中任一项所述的方法，其特征在于，所述请求消 息包括为所述第一IAB宿主和/或所述第一IAB节点服务的小区的标识。
  13. 根据权利要求2，或者权利要求4-12中任一项所述的方法，其特征在于，所述请求消息为第一接口建立请求消息或IAB配置更新请求消息。
  14. 一种通信装置，其特征在于，所述装置为无线接入网RAN管理网元，所述RAN管理网元通过第一接口连接第一接入回传一体化IAB宿主，所述第一IAB宿主与第一IAB节点通过无线回传链路连接，包括：
    确定单元，用于确定所述第一IAB宿主和/或所述第一IAB节点的配置信息，所述配置信息包括地址信息、路由信息和小区信息中的一种或多种；
    发送单元，用于向所述第一IAB宿主发送所述配置信息。
  15. 根据权利要求14所述的装置，其特征在于，所述装置还包括：
    接收单元，用于接收来自所述第一IAB宿主的请求消息；
    所述发送单元，具体用于响应于所述请求消息，向所述第一IAB宿主发送所述配置信息。
  16. 一种通信装置，其特征在于，所述装置为第一接入回传一体化IAB宿主，所述第一IAB宿主通过第一接口连接无线接入网RAN管理网元，所述第一IAB宿主与第一IAB节点通过无线回传链路连接，包括：
    接收单元，用于通过所述第一接口接收来自所述RAN管理网元的所述第一IAB宿主和/或所述第一IAB节点的配置信息，所述配置信息包括地址信息、路由信息和小区信息中的一种或多种；
    获取单元，用于获取所述地址信息、所述路由信息和所述小区信息中的一种或多种。
  17. 根据权利要求16所述的装置，其特征在于，所述装置还包括：
    第一发送单元，用于向所述RAN管理网元发送请求消息，所述请求消息用于请求所述配置信息。
  18. 根据权利要求16或17所述的装置，其特征在于，所述装置还包括：
    第二发送单元，用于向所述第一IAB节点发送所述第一IAB节点的配置信息。
  19. 根据权利要求14-18任一项所述的装置，其特征在于，所述地址信息包括回传适配协议BAP层标识和/或网络互连协议IP地址。
  20. 根据权利要求14-19任一项所述的装置，其特征在于，所述路由信息包括适配层路由标识和/或路由映射表，所述路由映射表包括所述适配层路由标识和下一跳节点的标识。
  21. 根据权利要求14-20任一项所述的装置，其特征在于，所述小区信息包括小区的标识和小区的资源配置。
  22. 根据权利要求21所述的装置，其特征在于，所述小区的资源配置包括小区的频点信息、小区的带宽信息、小区的上下行双工模式中的一种或多种。
  23. 根据权利要求15，或者权利要求17-22中任一项所述的装置，其特征在于，所述请求消息包括所述第一IAB节点和/或所述第一IAB宿主所需地址的数量，以及所述第一IAB节点和/或所述第一IAB宿主的标识。
  24. 根据权利要求15，或者权利要求17-23任一项所述的装置，其特征在于，所述请求消息包括拓扑信息，所述拓扑信息包括所述第一IAB宿主和/或所述第一IAB节点与其它节点之间的连接关系。
  25. 根据权利要求15，或者权利要求17-24任一项所述的装置，其特征在于，所述请求消 息包括为所述第一IAB宿主和/或所述第一IAB节点服务的小区的标识。
  26. 根据权利要求15，或者权利要求17-25任一项所述的装置，其特征在于，所述请求消息为第一接口建立请求消息或IAB配置更新请求消息。
  27. 一种通信装置，其特征在于，包括处理器，所述处理器和存储器耦合，所述处理器调用所述存储器中存储的计算机程序实现如权利要求1-2任一项或者权利要求6-13任一项所述的方法。
  28. 一种通信装置，其特征在于，包括处理器、存储器，所述处理器和存储器耦合，所述处理器调用所述存储器中存储的计算机程序实现如权利要求3-13任一项所述的方法。
  29. 一种通信系统，其特征在于，包括如权利要求27所述的装置以及如权利要求28所述的装置。
  30. 一种通信方法，其特征在于，所述方法应用于无线接入网RAN管理网元，所述RAN管理网元通过第一接口连接第一接入回传一体化IAB宿主，所述RAN管理网元通过第二接口连接第一IAB节点，所述第一IAB宿主与所述第一IAB节点通过无线回传链路连接，包括：
    确定所述第一IAB节点的配置信息，所述配置信息包括地址信息、路由信息和小区信息中的一种或多种；
    通过所述第二接口向所述第一IAB节点发送所述配置信息。
  31. 根据权利要求30所述的方法，其特征在于，所述方法还包括：
    通过所述第一接口向所述第一IAB宿主发送所述配置信息。
  32. 根据权利要求30或31所述的方法，其特征在于，所述方法还包括：
    确定所述第一IAB宿主的配置信息；
    通过所述第一接口向所述第一IAB宿主发送所述第一IAB宿主的配置信息。
  33. 根据权利要求32所述的方法，其特征在于，所述方法还包括：
    接收来自所述第一IAB宿主的第一请求消息；
    所述通过所述第一接口向所述第一IAB宿主发送所述第一IAB宿主的配置信息包括：
    响应于所述第一请求消息，通过所述第一接口向所述第一IAB宿主发送所述第一IAB宿主的配置信息。
  34. 根据权利要求30-33任一项所述的方法，其特征在于，所述方法还包括：
    接收来自所述第一IAB节点的第二请求消息；
    所述通过所述第二接口向所述第一IAB节点发送所述配置信息包括：
    响应于所述第二请求消息，通过所述第二接口向所述第一IAB节点发送所述配置信息。
  35. 一种通信方法，其特征在于，所述方法应用于第一接入回传一体化IAB节点，所述第一IAB节点与第一IAB宿主通过无线回传链路连接，所述第一IAB节点通过第二接口连接无线接入网RAN管理网元，包括：
    通过所述第二接口接收来自所述RAN管理网元的所述第一IAB节点的配置信息，所述配置信息包括地址信息、路由信息和小区信息中的一种或多种；
    获取所述地址信息、所述路由信息和所述小区信息中的一种或多种。
  36. 根据权利要求35所述的方法，其特征在于，所述方法还包括：
    通过所述第二接口向所述RAN管理网元发送第二请求消息，所述第二请求消息用于请求所述配置信息。
  37. 一种通信装置，其特征在于，所述装置为无线接入网RAN管理网元，所述RAN管理网元通过第一接口连接第一接入回传一体化IAB宿主，所述RAN管理网元通过第二接口连接第一IAB节点，所述第一IAB宿主与所述第一IAB节点通过无线回传链路连接，包括：
    确定单元，用于确定所述第一IAB节点的配置信息，所述配置信息包括地址信息、路由信息和小区信息中的一种或多种；
    发送单元，用于通过所述第二接口向所述第一IAB节点发送所述配置信息。
  38. 根据权利要求37所述的装置，其特征在于，所述发送单元，还用于通过所述第一接口向所述第一IAB宿主发送所述配置信息。
  39. 根据权利要求37或38所述的装置，其特征在于，所述确定单元，还用于确定所述第一IAB宿主的配置信息；
    所述发送单元，还用于通过所述第一接口向所述第一IAB宿主发送所述第一IAB宿主的配置信息。
  40. 根据权利要求39所述的装置，其特征在于，所述装置还包括：
    第一接收单元，用于接收来自所述第一IAB宿主的第一请求消息；
    所述述发送单元通过所述第一接口向所述第一IAB宿主发送所述第一IAB宿主的配置信息包括：
    响应于所述第一请求消息，通过所述第一接口向所述第一IAB宿主发送所述第一IAB宿主的配置信息。
  41. 根据权利要求37-40任一项所述的装置，其特征在于，所述装置还包括：
    第二接收单元，用于接收来自所述第一IAB节点的第二请求消息；
    所述发送单元通过所述第二接口向所述第一IAB节点发送所述配置信息包括：
    响应于所述第二请求消息，通过所述第二接口向所述第一IAB节点发送所述配置信息。
  42. 一种通信装置，其特征在于，所述装置为第一接入回传一体化IAB节点，所述第一IAB节点与第一IAB宿主通过无线回传链路连接，所述第一IAB节点通过第二接口连接无线接入网RAN管理网元，包括：
    接收单元，用于通过所述第二接口接收来自所述RAN管理网元的所述第一IAB节点的配置信息，所述配置信息包括地址信息、路由信息和小区信息中的一种或多种；
    获取单元，用于获取所述地址信息、所述路由信息和所述小区信息中的一种或多种。
  43. 根据权利要求42所述的装置，其特征在于，所述装置还包括：
    发送单元，用于通过所述第二接口向所述RAN管理网元发送第二请求消息，所述第二请求消息用于请求所述配置信息。
  44. 根据权利要求30-36任一项所述的方法，或者根据权利要求37-43任一项所述的装置，其特征在于，所述地址信息包括回传适配协议BAP层标识和/或网络互连协议IP地址。
  45. 根据权利要求30-36任一项所述的方法，或者根据权利要求37-43任一项所述的装置，其特征在于，所述路由信息包括适配层路由标识和/或路由映射表，所述路由映射表包括所述适配层路由标识和下一跳节点的标识。
  46. 根据权利要求30-36任一项所述的方法，或者根据权利要求37-43任一项所述的装置，其特征在于，所述小区信息包括小区的标识和小区的资源配置。
  47. 根据权利要求46所述的方法或装置，其特征在于，所述小区的资源配置包括小区的 频点信息、小区的带宽信息、小区的上下行双工模式中的一种或多种。
  48. 根据权利要求33或34所述的方法，或者根据权利要求40或41所述的装置，其特征在于，所述第一请求消息包括所述第一IAB宿主所需地址的数量以及所述第一IAB宿主的标识。
  49. 根据权利要求33、34或48所述的方法，或者根据权利要求40、41或48所述的装置，其特征在于，所述第一请求消息包括第一拓扑信息，所述第一拓扑信息包括所述第一IAB宿主与IAB节点之间的连接关系。
  50. 根据权利要求33、34、48或49所述的方法，或者根据权利要求40、41、48或49所述的装置，其特征在于，所述第一请求消息包括为所述第一IAB宿主服务的小区的标识。
  51. 根据权利要求33、34、48、49或50所述的方法，或者根据权利要求40、41、48、49或50所述的装置，其特征在于，所述第一请求消息为第一接口建立请求消息或IAB配置更新请求消息。
  52. 根据权利要求34或36所述的方法，或者根据权利要求41或43所述的装置，其特征在于，所述第二请求消息包括所述第一IAB节点所需地址的数量以及所述第一IAB节点的标识。
  53. 根据权利要求34、36或52所述的方法，或者根据权利要求41、43或52所述的装置，其特征在于，所述第二请求消息包括第二拓扑信息，所述第二拓扑信息包括所述第一IAB节点与所述第一IAB节点的父节点和/或子节点之间的连接关系。
  54. 根据权利要求34、36、52或53所述的方法，或者根据权利要求41、43、52或53所述的装置，其特征在于，所述第二请求消息包括为所述第一IAB节点服务的小区的标识。
  55. 根据权利要求34、36、52、53或54所述的方法，或者根据权利要求41、43、52、53或54所述的装置，其特征在于，所述第二请求消息为第二接口建立请求消息或IAB配置更新请求消息。
  56. 一种通信装置，其特征在于，包括处理器，所述处理器和存储器耦合，所述处理器调用所述存储器中存储的计算机程序实现如权利要求30-34任一项或者权利要求44-55任一项所述的方法。
  57. 一种通信装置，其特征在于，包括处理器、存储器，所述处理器和存储器耦合，所述处理器调用所述存储器中存储的计算机程序实现如权利要求35或36所述的方法，或者权利要求44-47、52-55任一项所述的方法。
  58. 一种通信系统，其特征在于，包括如权利要求56所述的装置以及如权利要求57所述的装置。
  59. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有计算机程序或计算机指令，当所述计算机程序或计算机指令被运行时，实现如权利要求1-13、30-36、44-55任一项所述的方法。
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