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WO2018228371A1 - 通信方法和装置以及无线接入网络 - Google Patents

通信方法和装置以及无线接入网络 Download PDF

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Publication number
WO2018228371A1
WO2018228371A1 PCT/CN2018/090813 CN2018090813W WO2018228371A1 WO 2018228371 A1 WO2018228371 A1 WO 2018228371A1 CN 2018090813 W CN2018090813 W CN 2018090813W WO 2018228371 A1 WO2018228371 A1 WO 2018228371A1
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WO
WIPO (PCT)
Prior art keywords
access network
network node
information
transmission channel
request
Prior art date
Application number
PCT/CN2018/090813
Other languages
English (en)
French (fr)
Inventor
罗海燕
王曼
彭文杰
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 JP2020518118A priority Critical patent/JP6920550B2/ja
Priority to EP18817319.9A priority patent/EP3627958B1/en
Publication of WO2018228371A1 publication Critical patent/WO2018228371A1/zh
Priority to US16/712,077 priority patent/US11212732B2/en

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Classifications

    • 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
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/18—Network planning tools
    • H04W16/20—Network planning tools for indoor coverage or short range network deployment
    • 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
    • H04W76/00—Connection management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • 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

Definitions

  • the present application relates to the field of communications and, more particularly, to a communication method and apparatus and a wireless access network.
  • the base station can be divided into a control unit (CU) and a data unit (DU), or the CU can also be called a central unit (central).
  • Unit, CU), DU may also be referred to as a distribution unit (DU), where the CU may have some or all of a radio resource control (RRC) function, or further have one or more of the following RRC layers
  • RRC radio resource control
  • the protocol layer function, the DU may have some or all of the physical layer functions, or further have one or more protocol layer functions above the physical layer.
  • the CU can also realize the separation of the user plane (UP) and the control plane (CP) functions.
  • UP user plane
  • CP control plane
  • the present application provides a communication method and a communication device, which can be applied to a scenario in which access network device functions are separated.
  • a communication method including: a first access network node can obtain endpoint information of a second transmission channel at a second access network node, and the second transmission channel is at a third access network node Endpoint information, and transmitting, to the third access network node, endpoint information of the second transmission channel at the second access network node, and transmitting the second transmission channel to the second access network node at the third connection Endpoint information at the ingress node.
  • the communication method can establish a DRB transmission channel between the second access network node and the third access network node to implement establishment of a user plane.
  • the first access network node sends a first request to the third access network node, and receives a first response in response to the first request from the third access network node.
  • the first access network node sends a second request to the second access network node, and receives a second response from the second access network node in response to the second request response.
  • the establishment of the transmission channel of the DRB may be initiated by the first access network node.
  • the first request and the second request may be used to request to establish a transmission channel of the DRB between the second access network node and the third access network node, that is, request to establish a second transmission channel.
  • the DRB may correspond to an E-RAB or PDU session.
  • the first response and the second response may respectively include configuration information, such as endpoint information, of the transmission channel of the DRB at the third access network node and the second access network node.
  • the first response may include endpoint information of the second transmission channel of the DRB at the third access network node
  • the second response may include the second transmission channel of the DRB at the second access network node Endpoint information, such as TEID.
  • the first access network node sends the second request to the second access network node, where the first access network node sends the first access node to the second access network node after receiving the first response.
  • the second request wherein the second request includes endpoint information of the second transmission channel on the third access network node side.
  • the first access network node may send the second transmission channel to the third access network node after receiving the second response in response to the second request from the second access network node.
  • Two endpoint information on the access node side of the network may be used to send the second transmission channel to the third access network node after receiving the second response in response to the second request from the second access network node.
  • the first access network node first sends a first request to the third access network node, and after receiving the first response, sends a second request to the second access network node.
  • the first access network node sends the first request to the third access network node, where the first access network node sends the third access network node to the third access network node after receiving the second response.
  • a request wherein the first request includes endpoint information of the second transmission channel on the second access network node side.
  • the first access network node may send the second transmission channel to the second access network node after receiving the first response in response to the first request from the first access network node.
  • the endpoint information of the three access network node side may be used to send the second transmission channel to the second access network node after receiving the first response in response to the first request from the first access network node.
  • the first access network node first sends a second request to the second access network node, and sends a first request to the third access network node after receiving the second response.
  • the first access network node obtains, from the second access network node, endpoint information of the second transmission channel on the second access network node side, including: the first Receiving, by the access network node, a third request sent by the second access network node, where the third request includes first indication information indicating a mapping relationship between the DRB and the flow, and the second transmission channel is in the second access Endpoint information on the network node side; the first access network node sends the endpoint information of the second transmission channel on the third access network node side to the second access network node, including: the first access network node And transmitting, according to the third request, a third response to the second access network node.
  • the establishment of the transmission channel of the DRB may be initiated by the second access network node.
  • the third response includes endpoint information of the second transmission channel on the third access network node side.
  • the first access network node may send the first request to the third access network node after receiving the third request.
  • the first access network node may send the third response to the second access network node after receiving the first response.
  • the first access network node may further send the second indication information to the terminal device by using the third access network node, where the second indication information is used to indicate a mapping relationship between the DRB and the flow.
  • the second indication information can be used to indicate at least one stream mapped to the DRB.
  • the method before the sending the second request to the second access network node, the method further includes: the first access network node acquiring QoS information of the flow; the first access network node according to the QoS information of the flow, Determine that the stream is mapped to the DRB.
  • the second request may include first indication information indicating a mapping relationship between the DRB and the flow.
  • the first access network node may obtain QoS information of the flow from the core network.
  • the first access network node may receive control signaling from the core network containing QoS information for the flow.
  • the first access network node may also obtain QoS information of the flow from the second access network node.
  • the first access network node may obtain signaling from the second access network node that includes QoS information for the flow.
  • the first access network node may perform admission control on the flow, and after determining to accept the flow, send the second request to the second access network node.
  • the method further includes: the first access network node receiving, from the second access network node, first indication information indicating a mapping relationship between the DRB and the flow.
  • another communication method including: the second access network node sends, to the first access network node, endpoint information of the second transmission channel on the second access network node side; the second access The network node receives, from the first access network node, endpoint information of the second transmission channel on the third access network node side.
  • the second access network node may receive the second request from the first access network node, where the second access network node sends the first connection according to the second request The ingress node sends a second response.
  • the second response includes endpoint information of the second transmission channel on the second access network node side.
  • the second access network node may receive the second access channel from the first access network node after receiving the second transmission channel on the second access network node side end information. Endpoint information of the transmission channel on the side of the third access network node.
  • the second request may include endpoint information of the second transmission channel on the third access network node side.
  • the second access network node After receiving the endpoint information of the second transmission channel on the third access network node side, the second access network node sends a second transmission channel to the second access network to the second access network node. Endpoint information on the node side.
  • the second access network node may send a third request to the first access network node, where the third request includes a mapping relationship between the flow and the DRB. And indication information and endpoint information of the second transmission channel on the second access network node side.
  • the second access network node receives a third response in response to the third request from the first access network node, where the third response includes the second transmission channel in the third access network Endpoint information on the node side.
  • another communication method including: a third access network node receives, from a first access network node, endpoint information of a second transmission channel on a second access network node side; the third access network The node sends the endpoint information of the second transmission channel to the third access network node side to the first access network node.
  • the third access network node receives the first request from the first access network node; the third access network node sends the first response to the first access network node according to the first request.
  • the first response includes endpoint information of the second transmission channel on the third access network node side.
  • the third access network node may receive, after sending the second transmission channel end information on the third access network node side to the first access network node, from the first access network node. Endpoint information of the second transmission channel on the side of the second access network node.
  • the first request includes endpoint information of the second transmission on the second access network node side.
  • the third access network node sends the second transmission to the first access network node after receiving the endpoint information of the second transmission channel on the second access network node side from the first access network node. Endpoint information of the channel on the third access network node side.
  • another communication method including: a first access network node sends a request message to a third access network node; the first access network node receives a response from the third access network node A response message to the request message.
  • a fifth aspect provides another communication method, including: a third access network node receives a request message from a first access network node; and the third access network node configures an SRB according to the request message; The network access node sends a response message to the first access network node.
  • the request message is used to establish a transmission channel of the SRB.
  • the request message includes at least one of the following information: information of the SRB, endpoint information of the transmission channel on the first access network node side, configuration information of at least one protocol layer of the third access network node.
  • the transmission channel is a channel corresponding to the SRB between the first access network node and the third access network node.
  • the endpoint information of the transmission channel included in the request message on the first access network node side may specifically include a UL GTP-U TEID and/or a transport layer address, such as an IP address.
  • the information of the SRB may include identifier information of the SRB.
  • the response message may include endpoint information of the third transmission channel on the third access network node side, such as a DL GTP-U TEID and/or an IP address.
  • the communication method can establish a transmission channel of the SRB between the first access network node and the third access network node, and implement the establishment of the control plane.
  • another communication method including: a first source access network node sends a first handover request to a first target access network node, where the first handover request includes a core network and a second source access network Endpoint information of the transmission channel between the nodes on the core network side; the first source access network node receives a first handover response from the first target access network node, where the first handover response includes data forwarding corresponding to the terminal device Endpoint information of the channel on the second target access network node side; the first source access network node sends first indication information to the second source access network node, where the first indication information includes the data forwarding channel at the The second source access network node sends the second indication information to the third source access network node, where the second indication information is used to indicate that the third source access network node is released.
  • the configuration of the terminal device includes: a first source access network node sends a first handover request to a first target access network node, where the first handover request includes a core network and a second source access network Endpoint
  • another communication method including: receiving, by a first target access network node, a first handover request from a first source access network node, where the first handover request includes a core network and a second source access network Endpoint information of the transmission channel between the nodes on the core network side; the first target access network node sends a second handover request to the second target access network node according to the first handover request; the first target access The network node receives, from the second target access network node, a second handover response that is responsive to the second handover request, where the second handover response includes endpoint information of the data forwarding channel on the second target access network side; A target access network node sends a first handover response to the first source access network node, where the first handover response includes endpoint information of the data forwarding channel on the second target access network side.
  • a communication apparatus for performing the method of any of the first aspect or the first aspect of the first aspect.
  • the apparatus comprises means for performing the method of any of the above-described first aspect or any of the possible implementations of the first aspect.
  • the apparatus comprises means for performing the method of any of the above-described second aspect or any of the possible implementations of the second aspect.
  • the apparatus comprises means for performing the method of any of the possible implementations of the third aspect or the third aspect described above.
  • the apparatus comprises means for performing the method of any of the above-described fourth or fourth aspects of the fourth aspect.
  • the apparatus comprises means for performing the method of any of the possible implementations of the fifth or fifth aspect above.
  • the apparatus comprises means for performing the method of any of the possible implementations of the sixth or sixth aspect described above.
  • the apparatus comprises means for performing the method of any of the above-described seventh aspect or any of the possible implementations of the seventh aspect.
  • another communication apparatus comprising: a memory and a processor for storing instructions for executing instructions stored by the memory, and when the processor executes the instructions stored by the memory The execution causes the processor to perform the method of the first aspect or any possible implementation of the first aspect.
  • another communication apparatus comprising: a memory and a processor for storing instructions for executing instructions stored by the memory, and when the processor executes the instructions stored by the memory The execution causes the processor to perform the method of the second aspect or any possible implementation of the second aspect.
  • another communication apparatus comprising: a memory and a processor for storing instructions for executing instructions stored by the memory, and when the processor executes the instructions stored by the memory The execution causes the processor to perform the method of any of the third aspect or any of the possible implementations of the third aspect.
  • another communication apparatus comprising: a memory for storing instructions for executing instructions stored in the memory, and a processor, and when the processor executes the instructions stored by the memory The execution causes the processor to perform the method of any of the possible implementations of the fourth aspect or the fourth aspect.
  • another communication apparatus comprising: a memory and a processor for storing instructions for executing instructions stored by the memory, and when the processor executes the instructions stored by the memory The execution causes the processor to perform the method of any of the possible implementations of the fifth aspect or the fifth aspect.
  • another communication apparatus comprising: a memory and a processor for storing instructions for executing instructions stored by the memory, and when the processor executes the instructions stored by the memory The execution causes the processor to perform the method of any of the possible implementations of the sixth aspect or the sixth aspect.
  • another communication apparatus comprising: a memory for storing instructions for executing instructions stored in the memory, and a processor for executing the instructions stored by the memory The execution causes the processor to perform the method of any of the possible implementations of the seventh aspect or the seventh aspect.
  • a twenty-second aspect a computer readable storage medium having instructions stored in a computer, when executed on a computer, causes the computer to perform the communication method of any of the above aspects.
  • a computer program product comprising instructions which, when run on a computer, cause the computer to perform the communication method of any of the above aspects.
  • the invention provides a wireless access network, comprising the apparatus of any one of the possible implementations of the eighth aspect or the eighth aspect, the ninth aspect, or any possible implementation manner of the ninth aspect
  • another radio access network comprising the apparatus of any one of the possible implementations of the eleventh or eleventh aspect, and any of the twelfth or twelfth aspect A device in a possible implementation. Or the apparatus of any one of the possible implementations of the eighteenth aspect or the eighteenth aspect, and the apparatus of any one of the nineteenth aspect or the nineteenth aspect.
  • another radio access network comprising the apparatus of any one of the thirteenth aspect or the thirteenth aspect, and any one of the fourteenth aspect or the fourteenth aspect A device in a possible implementation.
  • the apparatus of any one of the possible implementations of the twentieth aspect or the twentieth aspect, and the apparatus of any one of the possible implementations of the twenty-first aspect or the twenty-first aspect are provided.
  • a processing apparatus comprising a processor and an interface; wherein the processor is operative to perform the method of any of the above aspects.
  • the processing device can be a chip.
  • the first request includes configuration information for at least one protocol layer of the third access network node.
  • the configuration information of the at least one protocol layer is associated with the DRB.
  • the third access network node may configure the DRB according to the configuration information of the protocol layer included in the first request.
  • the second request includes configuration information for at least one protocol layer of the second access network node.
  • the configuration information of the at least one protocol layer is associated with the DRB.
  • the second access network node may configure the DRB according to the configuration information of the protocol layer included in the first request.
  • the second request includes endpoint information of the first transmission channel on the core network side.
  • the first transmission channel is a transmission channel corresponding to the DRB between the core network and the second access network node.
  • the first transmission channel may be specifically a transmission channel corresponding to the PDU session of the DRB, or a transmission channel corresponding to the E-RAB of the DRB.
  • the second transmission channel may be specifically a transmission channel of the DRB.
  • the second response further includes endpoint information of the first transmission channel on the second access network node side.
  • the core network may send the flow information to the first access network node via a control plane message.
  • the first access network node may determine, according to the information of the flow, that the flow is mapped to the DRB, and send the indication to the second access network node to the flow and the The first indication information of the mapping relationship between the DRBs.
  • the second request includes the first indication information.
  • the first access network node may send the information of the flow to the second access network node.
  • the second access network node may determine, according to the information of the flow, the flow mapping to the DRB, and send an indication to the first access network node. First indication information of a mapping relationship between the flow and the DRB.
  • the second request includes information about the flow
  • the second response includes the first indication information
  • the core network may send a data packet to the second access network node, and the second access network node may obtain information of the flow to which the data packet belongs from the received data packet.
  • the second access network node may determine, according to the information of the flow obtained from the data packet, the flow mapping to the DRB, and send, to the first access network node, the indication between the flow and the DRB.
  • the first indication of the mapping relationship may be determined, according to the information of the flow obtained from the data packet, the flow mapping to the DRB, and send, to the first access network node, the indication between the flow and the DRB. The first indication of the mapping relationship.
  • the second access network node may further perform admission control on the flow, and after determining to accept the flow, to the first access The network node sends the first indication information.
  • the first access network node may perform admission control on the flow, and after determining to accept the flow, send the second transmission to the second access network node. Endpoint information of the channel at the third access network node.
  • the first access network node or the second access network node may send third indication information indicating that the flow is rejected to the core network if it is determined not to accept the flow or reject the flow.
  • the first access network node or the second access network node may send information of the flow, such as an identification of the flow, to the core network.
  • the third request includes the first indication information.
  • the second access network node may send information about the flow obtained from the data packet to the first access network node.
  • the first access network node may determine, according to the information of the flow, the flow mapping to the DRB, and send the indication to the second access network node.
  • the information of the flow may include QoS information of the flow.
  • the endpoint information may specifically include at least one of a UL GTP-U TEID and a transport layer address.
  • the transport layer address may be specifically an IP address.
  • the endpoint information of the transmission channel between the core network and the second source access network node included in the first handover request on the core network side may specifically include UL GTP-U TEID and/or transmission. Layer address.
  • the endpoint information of the data forwarding channel may include endpoint information for a channel for forwarding upstream data and/or endpoint information for a channel for forwarding downlink data.
  • the access network device is separated into a central node and a distributed node controlled by the central node.
  • the first access network node and the second access network node collectively function as a central node
  • the third access network node acts as a distribution node, wherein the first access network node has control of the central node
  • the surface function, the second access network node has a user plane function of the central node.
  • the first access network node may be specifically a CU-C
  • the second access network node may be specifically a CU-U
  • the third access network node may be specifically a DU.
  • FIG. 1 is a schematic diagram of an application scenario example of an embodiment of the present application.
  • FIG. 2 is a schematic diagram of an example of function separation of an access network device in an application scenario according to an embodiment of the present application.
  • FIG. 3 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 4 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • FIG. 5 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • FIG. 6 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • FIG. 7 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • FIG. 8 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • FIG. 9 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • FIG. 10 is a schematic block diagram of a communication apparatus according to an embodiment of the present application.
  • FIG. 11 is a schematic block diagram of another communication apparatus provided by an embodiment of the present application.
  • FIG. 12 is a schematic block diagram of another communication apparatus provided by an embodiment of the present application.
  • FIG. 13 is a schematic block diagram of another communication apparatus provided by an embodiment of the present application.
  • GSM global system of mobile communication
  • CDMA code division multiple access
  • WCDMA wideband code division multiple access
  • GPRS general packet radio service
  • LTE long term evolution
  • LTE frequency division duplex frequency Division duplex
  • FDD Frequency Division duplex
  • TDD time division duplex
  • UMTS universal mobile telecommunication system
  • WiMAX worldwide interoperability for microwave access
  • PLMN public land mobile network
  • NR new radio
  • the CRAN scenario applied to the 5G system in the embodiment of the present application is described as an example.
  • the embodiment of the present application can also be applied to the scenario where the functions of other access network devices are separated.
  • radio remote scenarios ie, baseband module and radio module separation
  • DC dual connection
  • macro-micro station scenarios LTE and Wifi Aggregation
  • LWA Wifi Aggregation
  • Scenes, etc. in an LTE system, there are various non-cell scenarios (terminal devices can switch freely between cells, there is no clear boundary between cells), virtualized scenarios, and the like;
  • the present application is also applicable to a scenario in which different systems/systems coexist. This embodiment of the present application does not limit this.
  • the wireless communication system to which the embodiment of the present application is applied may include a central network (CN) and a radio access network (RAN), and a protocol data unit (PDU) session may be established between the CN and the RAN. (session), wherein the PDU session may be composed of at least one service data stream of the user plane.
  • the data stream can be mapped into a data radio bearer (DRB).
  • DRB data radio bearer
  • the access network device can be separated into at least two access network nodes, wherein a standard or non-standard interface can exist between the at least two access network nodes.
  • the access network device may be a device that communicates with the terminal device.
  • the access network device can provide communication coverage for a particular geographic area and can communicate with terminal devices (e.g., UEs) located within the coverage area.
  • terminal devices e.g., UEs
  • the access network device may be a base transceiver station (BTS) in a GSM system or a CDMA system, or may be a base station (NodeB, NB) in a WCDMA system, or may be an evolved type in an LTE system.
  • BTS base transceiver station
  • NodeB NodeB
  • a base station evolved Node B, eNB or eNodeB
  • a wireless controller in a cloud radio access network or the network device may be a relay station, an access point (AP), In-vehicle devices, wearable devices, network-side devices such as gNBs or transmission points in future 5G networks, or network devices in future evolved PLMNs.
  • AP access point
  • In-vehicle devices wearable devices
  • network-side devices such as gNBs or transmission points in future 5G networks
  • network devices in future evolved PLMNs future evolved
  • the terminal device may be mobile or fixed.
  • the terminal device may refer to an access terminal, a user equipment (UE), a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, and a user agent.
  • the access terminal may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), with wireless communication.
  • an access network device may be separated into a control unit (CU) and a data unit (DU), or may be referred to as a central unit (CU) and a distribution unit. (Distributed unit, DU), or may have other names, which are not limited by the embodiment of the present application.
  • the CU may have part or all of a radio resource control (RRC) function, or further have one or more protocol layer functions below the RRC layer.
  • RRC radio resource control
  • the CU may have only part or all of the RRC layer functions, or have an RRC layer and some or all of the packet data convergence protocol (PDCP) layer functions, or have an RRC layer, a PDCP layer, and some or all of the wireless links.
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • RLC radio link control
  • MAC media access control
  • PHY partial physical
  • the DU may have some or all of the PHY layer functionality, or further have one or more protocol layer functions above the PHY layer.
  • the DU may have some or all of the RRC layer and the PDCP layer, the RLC layer, the MAC layer, and the PHY layer function, or have some or all of the PDCP layer and the RLC layer, the MAC layer, and the PHY layer function, or have some or all of the RLC layers and
  • the MAC layer and PHY layer functions, or only all or part of the PHY layer functions, are not limited in this embodiment of the present application.
  • the CU can be divided into user planes (CU-U) entities in the CU.
  • the control plane in CU (CU-C) entity in the CU may be responsible for processing and transmitting control related information in the CU, and the CU-U may be responsible for processing and transmitting data related information in the DU.
  • Figure 2 shows one possible implementation of the protocol stack for DU, CU-C and CU-U.
  • the CU and DU are split at the PDCP/RLC layer.
  • the DU includes a PHY layer, a MAC layer, and an RLC layer
  • the CU includes a layer of the PDCP layer and above.
  • the CU is divided into two parts: CU-C and CU-U.
  • the CU-C includes a PDCP layer and an RRC layer.
  • the CU-U includes a PDCP layer and a new service data adaptation protocol (SDAP) layer.
  • SDAP new service data adaptation protocol
  • the SDAP layer may be responsible for QoS-related access, including routing of QoS flows to the DRB, identification of IDs of uplink and downlink QoS flows, and the like.
  • the separation of CU and DU increases the interface F1 between CU and DU.
  • the separation of the user plane and the control plane on the CU side increases the interface Xy between CU-C and CU-U, and can interface between CU and DU.
  • F1 is further divided into F1-C (control plane interface) and F1-U (user plane interface). It should be understood that the above-mentioned respective interface names are exemplary and not limited, and each of the above-mentioned interfaces may have other names, which is not limited by the embodiment of the present application.
  • FIG. 2 is intended to help those skilled in the art to better understand the embodiments of the present application, and not to limit the scope of the embodiments of the present application.
  • a person skilled in the art can obviously make various equivalent modifications or changes according to the above examples, and such modifications or variations are also applicable to the embodiments of the present application.
  • the first access network node, the second access network node, and the third access network node may be used to jointly implement the functions of the access network device.
  • the access network device may be divided into a central node and a distribution node, where the first access network node may be used to implement a control plane of the central node, that is, the first access network node may have a control plane function of the central node,
  • the second access network node can be used to implement the user plane of the central node, that is, the second access network node can have the user plane function of the central node
  • the third access network node can be used to implement the distributed node, that is, the third access A network node can have the function of distributing nodes.
  • the first access network node may be specifically a CU-C
  • the second access network node may be specifically a CU-U
  • the third access network node may be specifically a DU, but the embodiment of the present application is not limited thereto. .
  • FIG. 3 shows a communication method 100 provided by an embodiment of the present application.
  • the communication method 100 can be used to establish a user plane.
  • the method 100 can be used to establish a transmission channel of a DRB.
  • the transmission channel of the DRB may include a first transmission channel and a second transmission channel, where the first transmission channel may be established between the second access network node and the core network, and the second transmission channel may be established in the second access channel. Between the network node and the third access network node.
  • the first access network node may separately obtain endpoint information of the second transmission channel at the second access network node and endpoint information at the third access network node, and connect the second transmission channel
  • the endpoint information at the second access network node notifies the third access network node, and the endpoint information of the second transmission channel at the third access network node is notified to the second access network node.
  • the establishment of the transmission channel of the DRB may be initiated by the first access network node.
  • the first access network node sends a first request to the third access network node.
  • the first access network node may send a first request to the third access network node, where the first request may be used to request to establish a user plane at the third access network node, that is, the first request may be specifically the first
  • the user plane establishes a request, wherein the first request may be used to request to establish one or more user planes, which is not limited by the embodiment of the present application.
  • the first request may be used to request that a transmission channel of the DRB, that is, a second transmission channel, be established between the third access network node and the second access network node.
  • the second transmission channel may be specifically a GPRS tunneling protocol-user plane (GTP-U) tunnel or a signaling control transmission protocol (SCTP) tunnel or other tunnel, but
  • GTP-U GPRS tunneling protocol-user plane
  • SCTP signaling control transmission protocol
  • the first request may include configuration information of the DRB, where the configuration information of the DRB may include the identifier information of the DRB and/or the QoS information corresponding to the DRB, but the embodiment of the present application is not limited thereto.
  • the first request may include configuration information of at least one protocol layer of the third access network node, where the at least one protocol layer may be used for data transmission of the DRB and/or processing data transmitted on the DRB. .
  • the at least one protocol layer may include a PHY layer, or include a PHY layer and a MAC layer, or include a PHY layer, a MAC layer, and an RLC layer, or include a PHY layer, a MAC layer, an RLC layer, and a PDCP layer, and the like.
  • the embodiment is not limited to this.
  • the PHY layer configuration information may include at least one of the following: configuration information of a physical downlink shared channel (PDSCH), configuration information of a physical uplink control channel (PUCCH), Configuration information of physical uplink shared channel (PUSCH), configuration information of uplink power control, reporting information of channel quality identifier (CQI), configuration information of antenna (for example, transmission of antenna) Mode, etc.), semi-statically scheduled configuration information.
  • the configuration information of the MAC layer may include at least one of the following information: information of a buffer status report (BSR) timer, configuration information of a dis-continuous reception (DRX), time The information of the time alignment timer (TA Timer) and the configuration information of the scheduling request.
  • BSR buffer status report
  • DRX dis-continuous reception
  • TA Timer time alignment timer
  • the configuration information of the RLC layer may include mode information of the RLC layer.
  • the configuration information of the PDCP layer may include key information of the user plane.
  • one or more of the configuration information of the PHY layer, the configuration information of the MAC layer, the configuration information of the RLC layer, and the configuration information of the PDCP layer may also include other information, and the embodiment of the present application is not limited thereto.
  • the third access network node may send the first response to the first access network node.
  • the third access network node may configure the DRB after receiving the first request.
  • the third access network node can configure at least one protocol layer for the DRB.
  • the third access network node may send a first response to the first user plane, indicating that the third access network node completes configuration of the DRB.
  • the third access network node may determine endpoint information of the second transmission channel on the third access network node side, and correspondingly, the first response may include the second transmission channel on the third access network node side.
  • the endpoint information may include a GTP-U tunneling endpoint identity (TEID) and/or a transport layer address, where the transport layer address may be an IP address, such as IPV4 or IPV6. Address, but the embodiment of the present application is not limited thereto.
  • the GTP-U TEID may be used for the second access network node to perform downlink (DL) data transmission.
  • the GTP-U TEID may also be referred to as a DL GTP-U TEID, but the embodiment of the present application is not limited thereto. this.
  • the first access network node sends a second request to the second access network node.
  • the first access network node may send a second request to the second access network node to request to establish a user plane at the second access network node.
  • the second request may be used to request to establish a second transmission channel.
  • the second request may include the identifier information of the DRB.
  • the second request may include endpoint information of the first transmission channel on the core network side, where the first transmission channel is a transmission channel between the core network and the second access network node, and the transmission channel may be Used to transmit data carried on the DRB.
  • the first transmission channel may be specifically a transmission channel established between an evolved radio access bearer (E-RAB) between the core network and the second access network node, where the E-RAB and the E-RAB are The DRB has a one-to-one mapping relationship.
  • the first transmission channel may be specifically a transmission channel established between the core network and the second access network node for the PDU session, where the PDU session is composed of at least one flow and reaches the radio access network (radio access network).
  • the at least one stream is mapped to the DRB by the RAN, but the embodiment of the present application is not limited thereto.
  • the endpoint information of the first transmission channel on the core network side may specifically include a GTP-U TEID and/or a transport layer address, where the GTP-U TEID may be used by the second access network node to perform uplink data.
  • the GTP-U TEID may also be referred to as a UL GTP-U TEID, but the embodiment of the present application is not limited thereto.
  • the second request may include configuration information of each of the at least one protocol layer of the second access network node, where the at least one protocol layer may be used for data transmission and/or processing of the DRB.
  • the data transmitted on the DRB may include a PDCP layer, or a PDCP layer and other layers, such as a PDCP layer and a SDAP layer, and the second request may carry one or more protocol layers for processing data carried on the DRB.
  • Configuration information of some or all of the protocol layers but the embodiment of the present application is not limited thereto.
  • the second access network node After receiving the second request sent by the first access network node, the second access network node sends a second response to the first access network node according to the second request.
  • the second access network node may configure a user plane at the second access network node. For example, the second access network node can configure at least one protocol layer of the second access network node. After the configuration is completed, the second access network node may send a second response to the first access network node, indicating that the second access network node completes the configuration of the DRB.
  • the second access network node may further determine endpoint information of the first transmission channel and/or the second transmission channel at the second access network node, optionally, the second response may include at least one of the following information
  • the first access network node may determine a mapping relationship between the DRB and a stream (ie, a data stream), and include, in the second request, a path for indicating the DRB and the flow. The first indication of the relationship between the mappings.
  • the DRB may have a mapping relationship with at least one flow, that is, one or more flows may be mapped to the DRB.
  • the first indication information may include identifier and/or QoS information of at least one flow that is mapped to the DRB.
  • the first access network node may obtain information about the flow, such as QoS information of the flow, and determine, according to the information of the flow, the flow mapping to the DRB, that is, determine that the flow has a mapping relationship with the DRB.
  • the first access network node may obtain information about the flow from the core network.
  • the first access network node may receive control signaling from the core network, where the control signaling includes information about the flow.
  • embodiments of the present application are not limited thereto.
  • the first access network node may also obtain information of the flow from the second access network node.
  • the second access network node may receive a data packet from the core network, where the data packet may include information about the flow to which the data packet belongs.
  • the packet header of the data packet may include flow information corresponding to the data packet, but The embodiments of the present application are not limited thereto.
  • the second access network node may obtain the flow information from the data packet, and send the information of the flow to which the data packet belongs to the first access network node, but the embodiment of the present application is not limited thereto.
  • the first access network node may perform admission control to determine whether to accept the flow. For example, the first access network node may determine whether to accept the flow according to a current network state, such as a load status of the radio access network; or the first access network node may be configured according to whether the QoS requirement of the flow can be met. To determine whether to accept the stream, and so on.
  • a current network state such as a load status of the radio access network
  • the first access network node may be configured according to whether the QoS requirement of the flow can be met.
  • the specific implementation of the access control of the first access network node in the embodiment of the present application is not limited.
  • the foregoing process may be performed, that is, establishing a transmission channel of the DRB.
  • the indication information indicating the refusal to accept the flow and/or the information of the flow may be sent to the core network, for example, the identifier of the flow, the application The embodiment is not limited thereto.
  • mapping relationship between the DRB and the flow may be determined by the second access network node, and the mapping relationship between the DRB and the flow is sent to the first access network node.
  • An indication information but the embodiment of the present application is not limited thereto.
  • the second access network node may determine the mapping relationship between the DRB and the flow in multiple manners, that is, determine at least one flow that has a mapping relationship with the DRB.
  • the first access network node may notify the second access network node of the flow information, where the flow information may include QoS information of the flow identifier and/or the flow, or may also include other information, which is implemented by the present application. The example is not limited to this.
  • the second access network node may determine, according to the flow information sent by the first access network node, a mapping relationship between the DRB and the flow, that is, determine that the flow is mapped to the DRB.
  • the second access network node may determine, according to the data packet received from the core network, a mapping relationship between the DRB and the flow, for example, the packet header of the data packet includes the flow information corresponding to the data packet.
  • the second access network node may obtain the flow information from the data packet, and determine that the flow is mapped to the DRB, but the embodiment of the present application is not limited thereto.
  • the second access network node may send a third request that includes the first indication information to the first access network node.
  • the third request may further include information about the flow and/or endpoint information of the second transmission channel at the second access network node, or may further include other information, which is not used by the embodiment of the present application. Make a limit.
  • the first access network node may send, to the third access network node, a first request that includes the endpoint information of the second transmission channel at the second access network node. And after receiving the endpoint information including the second transmission channel at the third access network node, sending a third response to the second access network node, where the third response includes the second transmission channel.
  • the endpoint information at the third access network node but the embodiment of the present application is not limited thereto.
  • the second access network node may further perform admission control on the flow, and determine to accept After the flow, the third request is sent to the first access network node, but the embodiment of the present application is not limited thereto.
  • the first access network node may perform admission control on the flow according to the information of the flow included in the third request, and determine to accept the flow. Then, the endpoint information of the second transmission channel at the second access network node is sent to the third access network node, but the embodiment of the present application does not limit this.
  • the third indication information indicating that the flow is not accepted may be sent to the core network.
  • the indication can be made explicitly or implicitly.
  • the first access network node or the second access network node may feed back information of the flow, such as the identifier of the flow, to the core network, but the embodiment of the present application is not limited thereto.
  • the first access network node may further send, by using the third access network node, second indication information that is used to indicate a mapping relationship between the DRB and the flow, for example, the first access network.
  • the node may send the RRC signaling to the terminal device by using the third access network node, where the RRC signaling includes the second indication information used to indicate the mapping relationship between the DRB and the flow, but the embodiment of the present application is not limited thereto.
  • the third access network node may transparently transmit the second indication information, or perform the second indication information.
  • the second indication information is sent to the terminal device after the processing, which is not limited by the embodiment of the present application.
  • the first access network node may send a mapping relationship between the DRB and the flow to the terminal device when the DRB is initially configured, and another flow of the terminal device is mapped to the established DRB.
  • the terminal device may determine the mapping relationship between the flow and the DRB in a learning manner. Accordingly, the first access network node may not send the mapping relationship between the flow and the DRB to the terminal device.
  • the mapping relationship between the DRB and the flow may be notified by the core network to the terminal device. For example, if the first access network node does not know the mapping relationship between the DRB and the flow and/or the information of the flow, the core network may use the non-access stratum (NAS) message to set the QoS of the flow.
  • NAS non-access stratum
  • the information is sent to the terminal device, and the flow identifier is sent to the second access network node through a next generation-user plane (NG-U) interface, but the embodiment of the present application is not limited thereto.
  • NG-U next generation-user plane
  • S130 and S110 may be performed at the same time, or may be performed in any order, which is not limited by the embodiment of the present application.
  • S130 may be performed after S110 and S120, that is, the first access network node may send a second to the second access network node after receiving the first response sent by the third access network node. request.
  • the second request may include endpoint information of the second transmission channel on the third access network node side.
  • the second access network node can obtain the endpoint information of the second transmission channel on the third access network node side from the second request, and include the second transmission channel in the second connection in the second response. Endpoint information on the access node side.
  • the first access network node may send indication information to the third access network node to indicate that the second transmission channel included in the second response is in the second connection.
  • the endpoint information on the access node side but the embodiment of the present application is not limited thereto.
  • S110 may be performed after S130 and S140, that is, the first access network node may send the first access node to the third access network node after receiving the second response sent by the second access network node.
  • a request may include endpoint information of the second transmission channel on the second access network node side.
  • the third access network node can obtain the endpoint information of the second transmission channel on the second access network node side from the first request, and include the second transmission channel in the third response in the first response. Endpoint information on the access node side.
  • the first access network node may send indication information to the second access network node to indicate that the second transmission channel included in the first response is in the third connection.
  • the endpoint information on the access node side but the embodiment of the present application is not limited thereto.
  • the endpoint information of the second transmission channel on the third access network node side may be configured by the first access network node, or may be determined by the third access network node itself.
  • the first access network node may modify the second transmission channel by using a modification process.
  • the modified access point information of the third access network node side notifies the second access network node, for example, the first access network node may send the second access network node to indicate that the second transmission channel is The indication information of the modified endpoint information on the third access network node side, but the embodiment of the present application is not limited thereto.
  • the establishment of the transmission channel of the DRB may be initiated by the second access network node.
  • the second access network node may send a third request to the first access network node, where the third request includes first indication information indicating a mapping relationship between the DRB and the flow.
  • the third request may further include endpoint information of the second transmission channel and/or the first transmission channel on the second access network node side.
  • the first access network node may send a third response to the second access network node according to the third request.
  • the third response may include endpoint information of the second transmission channel and/or the first transmission channel on the third access network node side.
  • the first access network node may send a first request to the third access network node after receiving the third request, and after receiving the first response, to the second access network node
  • the third response is sent, but the embodiment of the present application is not limited thereto.
  • the third response may include configuration information of at least one protocol layer of the second access network node.
  • the communication method provided by the embodiment of the present application can establish a DRB transmission channel between multiple access network nodes, thereby improving the feasibility of the system.
  • a first transmission channel between the CU-U and the core network and a second between the CU-U and the DU may be established.
  • the communication method provided by the embodiment of the present application will be described in detail below with reference to specific examples.
  • the first access network node is a CU-C
  • the second access network node is a CU-U
  • the third access network node is a DU
  • FIG. 4 shows another communication method 200 provided by an embodiment of the present application.
  • the core network informs the CU-C of the flow information through the control plane message, and the mapping relationship between the flow and the DRB is determined by the CU-C.
  • the CU-C sends, to the CU-U, first indication information indicating a mapping relationship between the flow and the DRB, configuration information of at least one protocol layer of the CU-U, and endpoint information of the transmission channel of the DRB on the core network side, for example, Core network TEID.
  • the CU-C may send a second request to the CU-U to request to establish a transmission channel of the DRB.
  • the second request includes the first indication information, the configuration information of the at least one protocol layer of the CU-U, and the endpoint information of the transmission channel of the DRB on the core network side.
  • the configuration information of the at least one protocol layer of the CU-U may include at least one of configuration information of the SDAP and the PDCP.
  • the CU-U After receiving the foregoing information from the CU-C, the CU-U sends the CU-C end point information of the transmission channel of the DRB on the CU-U side, for example, a CU-U TEID.
  • the endpoint information of the CU-U side may include at least one of the following: endpoint information of the CU-U facing the core network, that is, endpoint information of the first transmission channel on the CU-U side, such as TEID, hereinafter referred to as TEID. It is the UL TEID, and the endpoint information of the CU-U facing the DU, that is, the endpoint information of the second transmission channel on the CU-U side, such as TEID, hereinafter referred to as DL TEID.
  • the CU-U may configure the DRB.
  • the CU-U may send a second response to the CU-C, where the second response includes endpoint information of the transmission channel of the DRB on the CU-U side.
  • the CU-C sends configuration information of at least one protocol layer of the DU and endpoint information of the CU-U side, for example, a CU-U TEID, to the DU.
  • the configuration information of the at least one protocol layer of the DU may include at least one of configuration information of the RLC, the MAC, and the PHY.
  • the CU-C may send a first request to the DU, where the first request includes configuration information of at least one protocol layer of the DU and endpoint information on the CU-U side.
  • the CU-U TEID may be specifically a DL TEID of the CU-U.
  • the DU may send, to the CU-C, endpoint information of the DRB transmission channel on the DU side, for example, a DU TEID.
  • the DU may configure the DRB.
  • the DU may send a first response to the CU-C, where the first response includes endpoint information of the transmission channel of the DRB on the DU side.
  • the CU-C may send the endpoint information of the DU side to the CU-U.
  • the CU-U may reply acknowledgment (ACK) to the CU-C.
  • ACK acknowledgment
  • FIG. 5 shows another communication method 300 provided by an embodiment of the present application.
  • the core network informs the CU-C of the flow information through the control plane message, and the CU-C notifies the CU-U of the flow information, and the mapping relationship between the flow and the DRB is determined by the CU-U, and then the mapping relationship is performed. Tell CU-C.
  • the CU-C sends the stream information to the CU-U and the endpoint information of the DRB transmission channel on the core network side, for example, the core network TEID.
  • the flow information may include identification information and/or QoS information of the flow.
  • the CU-C may send a second request to the CU-U, where the second request includes the flow information and the endpoint information of the DRB transmission channel on the core network side.
  • the CU-U may send, to the CU-C, first indication information indicating a mapping relationship between the flow and the DRB, and endpoint information of the transmission channel of the DRB on the CU-U side, for example, CU-U TEID.
  • the CU-U may determine to map the flow to the DRB according to the flow information.
  • the endpoint information on the CU-U side may include at least one of a UL TEID and a DL TEID.
  • the CU-U may send a second response to the CU-C, where the second response includes the first indication information and endpoint information of the transmission channel of the DRB on the CU-U side.
  • the CU-C sends, to the DU, configuration information of at least one protocol layer of the DU and endpoint information of the transmission channel of the DRB on the CU-U side, for example, a CU-U TEID.
  • the CU-U TEID herein may be specifically a CU-U DL TEID.
  • the CU-C may send a first request to the DU, where the first request includes configuration information of at least one protocol layer of the DU and endpoint information of the transmission channel of the DRB on the CU-U side.
  • the DU may send, to the CU-C, endpoint information of the DRB transmission channel on the DU side, for example, a DU TEID.
  • the DU may configure the DRB.
  • the DU may send a first response to the CU-C, where the first response includes endpoint information of the transmission channel of the DRB on the DU side.
  • the CU-C may send the endpoint information of the DU side and the configuration information of the at least one protocol layer of the CU-U to the CU-U.
  • the CU-U may send an acknowledgement message, such as an ACK, to the CU-C.
  • FIG. 6 shows another communication method 400 provided by an embodiment of the present application.
  • the core network sends the data packet to the CU-U, and the CU-U obtains the flow information by parsing the data packet, and notifies the CU-C of the flow information, and the CU-C determines the mapping relationship between the flow and the DRB, and This mapping tells CU-U.
  • the CU-U sends the stream information to the CU-C.
  • the CU-C may send, to the CU-C, first indication information indicating a mapping relationship between the flow and the DRB, and configuration information of at least one protocol layer of the CU-U.
  • the CU-C may determine the DRB of the flow map according to the flow information.
  • the CU-C may send a second request to the CU-U, where the second request includes the first indication information and configuration information of the at least one protocol layer of the CU-U.
  • the CU-U After receiving the first indication information and the protocol layer configuration from the CU-C, the CU-U sends the CU-C end point information of the transmission channel of the DRB on the CU-U side, for example, a CU-U TEID.
  • the CU-U can configure the DRB according to a protocol layer configuration.
  • the CU-U may determine, according to the first indication information, endpoint information of the transmission channel of the DRB on the CU-U side.
  • the CU-U may send a second response to the CU-C, where the second response includes endpoint information of the transmission channel of the DRB on the CU-U side.
  • the CU-C may send configuration information of at least one protocol layer of the DU and endpoint information on the CU-U side to the DU.
  • the CU-C may send a first request to the DU, where the first request includes a protocol layer configuration and a CU-U TEID.
  • the DU may send the endpoint information on the DU side to the CU-C.
  • the DU may send a first response to the CU-C, where the first response includes a DU TEID.
  • the CU-C After receiving the endpoint information of the DU side from the DU, the CU-C sends the endpoint information of the DU side to the CU-U.
  • the CU-U After receiving the endpoint information of the DU side from the CU-C, the CU-U sends an acknowledgement message to the CU-C.
  • FIG. 7 shows another communication method 500 provided by an embodiment of the present application.
  • the core network sends the data packet to the CU-U, and the CU-U obtains the flow information by parsing the data packet, and the CU-U determines the mapping relationship between the flow and the DRB, and notifies the CU-C.
  • the CU-U sends the flow information, the first indication information indicating the mapping relationship between the flow and the DRB, and the endpoint information of the transmission channel of the DRB on the CU-U side to the CU-C.
  • the CU-U may send a third request to the CU-C, where the third request includes the flow information, the first indication information, and the endpoint information of the transmission channel of the DRB on the CU-U side.
  • the CU-C After receiving the foregoing information from the CU-U, the CU-C sends configuration information of at least one protocol layer of the DU and endpoint information on the CU-U side to the DU.
  • the CU-C may send a first request to the DU, where the first request includes a protocol layer configuration of the DU and endpoint information on the CU-U side.
  • the DU may send the endpoint information on the DU side to the CU-C.
  • the DU may send a first response to the CU-C, where the first response includes endpoint information on the DU side.
  • the CU-C may send the endpoint information of the DU side and the configuration information of the at least one protocol layer of the CU-U to the CU-U.
  • FIG. 8 illustrates a communication method 600 provided by another embodiment of the present application. This method can be used to establish a control plane.
  • the first access network node sends a request message to the third access network node, where the request message can be used to request to establish a control plane.
  • the request message may be specifically a control plane establishment request.
  • the request message may be used to request to establish a signaling radio bearer (SRB) transmission channel between the first access network node and the third access network node.
  • SRB signaling radio bearer
  • the request message may include at least one of the following information: information of the SRB, endpoint information of the third transmission channel on the first access network node side, and at least one protocol layer of the third access network node.
  • the configuration information, wherein the third transmission channel may be a transmission channel corresponding to the SRB between the first access network node and the third access network node.
  • the request message may further include other information, which is not limited by the embodiment of the present application.
  • the request message may include information of one or more SRBs.
  • the request message may include information of SRB1 and information of SRB2, but the embodiment of the present application is not limited thereto.
  • the third access network node may include one or more protocol layers for the SRB, including, for example, a PHY layer, or include a PHY layer and a MAC layer, or include a PHY layer, a MAC layer, and an RLC layer, or include a PHY layer, The MAC layer, the RLC layer, and the PDCP layer, and the like, the embodiment of the present application is not limited thereto.
  • the request message may contain configuration information for some or all of the one or more protocol layers.
  • the PHY layer configuration information may include at least one of the following information: configuration information of the PDSCH, configuration information of the PUCCH, configuration information of the PUSCH, configuration information of the uplink power control, reporting configuration information of the CQI, and antenna Configuration information (such as the transmission mode of the antenna, etc.), semi-statically scheduled configuration information.
  • the configuration information of the MAC layer may include at least one of the following information: information of the BSR timer, configuration information of the DRX, information of the TA Timer, configuration information of the scheduling request.
  • the configuration information of the RLC layer may include mode information of the RLC layer.
  • the configuration information of the PDCP layer may include key information of the user plane.
  • one or more of the configuration information of the PHY layer, the configuration information of the MAC layer, the configuration information of the RLC layer, and the configuration information of the PDCP layer may also include other information, and the embodiment of the present application is not limited thereto.
  • the third access network node may configure the SRB according to the request message, and send a response message to the first access network node.
  • the third access network node may configure the SRB at the third access network node. For example, the third access network node may determine endpoint information of the third transmission channel on the third access network node side, and/or configure at least one protocol layer for the SRB. After the configuration is complete, the third access network node may send a response message to the first user plane, indicating that the third access network node completes the configuration of the SRB.
  • the response message may include the endpoint information of the third transmission channel on the third access network node side, such as a GTP TEID and/or a transport layer address, or the response message may further include other information. There is no limit to this.
  • the communication method provided by the embodiment of the present application can establish a transmission channel of the SRB between the first access network node and the third access network node, thereby improving the feasibility of the system.
  • a transmission channel of the SRB may be established between the CU-C and the DU.
  • FIG. 9 shows a communication method 700 provided by another embodiment of the present application, which may be used for handover of a terminal device.
  • the first source access network node sends a first request to the first target access network node.
  • the first request may be used to request that the terminal device be handed over to the first target access network node.
  • the first request may include the endpoint information of the transmission channel between the second source access network node and the core network on the core network side, or may also include other information, which is not limited in this embodiment of the present application.
  • the first target access network node may determine endpoint information of the data forwarding channel corresponding to the terminal device.
  • the data forwarding channel may be established between the second source access network node and the second target access network node, and may be used by the second source access network node to forward the second source access network node to the second target access network node.
  • the data of the terminal device may include endpoint information of a channel for forwarding uplink data and/or endpoint information of a channel for forwarding downlink data, which is not limited in this embodiment of the present application.
  • the first target access network node may configure the data forwarding channel according to the information included in the first request, for example, the first target access network node may allocate an endpoint of the data forwarding channel.
  • the first target access network node may further send, to the second target access network node, indication information indicating the endpoint information of the data forwarding channel, for example, to the second target access network node.
  • the second request sent includes the endpoint information of the data forwarding channel, but the embodiment of the present application is not limited thereto.
  • the first target access network node sends a second request to the second target access network node.
  • the second request may include part or all of the information included in the first request, for example, the endpoint information of the transmission channel between the second source access network node and the core network on the core network side.
  • embodiments of the present application are not limited thereto.
  • the second target access network node may configure endpoint information of the data forwarding channel, such as a GTP TEID and/or a transport layer address, and send the first to the first target access network node.
  • the second response includes endpoint information of the data forwarding channel.
  • the first target access network node may obtain endpoint information of the data forwarding channel included in the second response.
  • the first target access network node may determine the configuration information of the data forwarding channel by using other methods, which is not limited in this embodiment of the present application.
  • the first target access network node sends a first response to the first source access network node, where the first response includes endpoint information of the data forwarding channel.
  • the first source access network node may send the endpoint information of the data forwarding channel to the second source access network node.
  • the second source access network node may forward the uplink of the terminal device to the second target access network node by using the data forwarding channel according to the indication information. / or downlink data.
  • the second source access network node may release the configuration of the terminal device, for example, discarding the second
  • the source access network node may be the context information of the terminal device, but the embodiment of the present application is not limited thereto.
  • the first access network node may further send, to the third source access network node, indication information for instructing the third source access network node to release the configuration of the terminal device, and correspondingly, the third source The configuration of the terminal device may be released by the access network node, but the embodiment of the present application is not limited thereto.
  • the first source access network node may be specifically a source CU-C
  • the second source access network node may be specifically a source CU-U
  • the third source access network node may be specific.
  • the first target access network node may be specifically the target CU-C
  • the second target access network node may be specifically the target CU-U, but the embodiment of the present application is not limited thereto.
  • the communication method provided by the embodiment of the present application can implement data forwarding from the source access network node to the target access network node when the terminal device switches the access network node, thereby improving the feasibility of the system.
  • the endpoint information of the transmission channel on a certain node side may specifically include a GTP-U TEID and/or a transport layer address, where the endpoint information may be used for uplink data transmission, or
  • the GTP-U TEID may be represented as a UL GTP-U TEID or a DL GTP-U TEID according to the role of the endpoint information, but the embodiment of the present application is not limited thereto.
  • FIG. 10 shows a communication device 800 provided by an embodiment of the present application, where the device 800 may be specifically a CU-C, but the embodiment of the present application is not limited thereto.
  • the apparatus 800 includes a transmitting unit 810 and a receiving unit 820.
  • the sending unit 810 is configured to send, to the second access network node, endpoint information of the second transmission channel at the third access network node, and send the second transmission to the third access network node. Endpoint information of the channel at the second access network node.
  • the receiving unit 820 can be configured to receive, from the second access network node, endpoint information of the second transmission channel at the second access network node, and receive the second transmission channel from the third access network node at the third access network node. Endpoint information at the location.
  • the sending unit 810 is configured to send a first request to the third access network node
  • the receiving unit 820 is configured to receive, from the third access network node, the response that is sent by the sending unit 810. The first response of the first request.
  • the first response includes endpoint information of the second transmission channel at the third access network node.
  • the sending unit 820 is configured to send a second request to the second access network node, where the receiving unit 820 is configured to receive, from the second access network node, the second request sent in response to the sending unit 810. The second response.
  • the second response includes endpoint information of the second transmission channel at the second access network node.
  • the sending unit 810 is specifically configured to: after receiving the first response, send a second request to the second access network node, where the second request further includes the second transmission channel in the third access Endpoint information on the side of the network node;
  • the sending unit 810 is further configured to: after the receiving unit 820 receives the second response, send, to the third access network node, endpoint information of the second transmission channel on the second access network node side.
  • the sending unit 810 is specifically configured to: after receiving the second response, send a first request to the third access network node, where the first request further includes the second transmission channel in the second access Endpoint information on the side of the network node;
  • the sending unit 810 is further configured to: after the receiving unit 820 receives the second response, send, to the second access network node, endpoint information of the second transmission channel on the third access network node side.
  • the apparatus 800 further includes: a processing unit, configured to acquire QoS information of the flow, and determine, according to the QoS information of the flow, a mapping relationship between the DRB and the flow, where the second request includes the indication The first indication of the mapping relationship.
  • a processing unit configured to acquire QoS information of the flow, and determine, according to the QoS information of the flow, a mapping relationship between the DRB and the flow, where the second request includes the indication The first indication of the mapping relationship.
  • the second request includes QoS information of the flow
  • the second response includes first indication information indicating the mapping relationship.
  • the receiving unit 820 is configured to receive a third request from the second access network node, where the sending unit 810 is configured to send, to the second access network node, a third response that is responsive to the third request.
  • the third request includes first indication information indicating a mapping relationship between the DRB and the flow, and endpoint information of the second transmission channel at the second access network node.
  • the sending unit 810 is configured to send a request message to the third access network node, where the request message includes at least one of the following information: information of the SRB, and the transmission channel is in the first access network. End point information of the node side, configuration information of at least one protocol layer of the third access network node, where the transmission channel is corresponding to the SRB between the first access network node and the third access network node Transmission channel
  • the receiving unit 820 is configured to receive, from the third access network node, a response message in response to the request message sent by the sending unit 810, where the response message includes the transmission channel on the third access network node side Endpoint information.
  • the communication device 800 is embodied in the form of a functional unit.
  • the communication device 800 may be specifically the first access network node in the foregoing embodiment, and the communication device 800 may be used to perform the first connection in the foregoing method embodiment.
  • the processes and/or steps corresponding to the network access node are not repeated here to avoid repetition.
  • FIG. 11 shows another communication device 900 provided by an embodiment of the present application, including: a sending unit 910 and a receiving unit 920.
  • the device may be specifically a CU-U, but the embodiment of the present application is not limited thereto.
  • the sending unit 910 is configured to send, to the first access network node, endpoint information of the second transmission channel on the second access network node side, where the second transmission channel is the second access network node and the a transmission channel corresponding to the data radio bearer DRB between the third access network nodes;
  • the receiving unit 920 is configured to receive, from the first access network node, endpoint information of the second transmission channel on the third access network node side.
  • the receiving unit 920 is further configured to: before the sending unit 910 sends, to the first access network node, the endpoint information of the second transmission channel on the second access network node side, from the first access network node. Receiving a second request;
  • the sending unit 910 is specifically configured to send, according to the second request, a second response to the first access network node, where the second response includes endpoint information of the second transmission channel on the second access network node side .
  • the second request includes endpoint information of the first transmission channel on the core network side
  • the second response further includes endpoint information of the first transmission channel on the second access network node side.
  • the second request includes endpoint information of the second transmission channel on a third access network node side.
  • the second access network node receives the endpoint information of the second transmission channel on the third access network node side from the first access network node, including:
  • the receiving unit 920 is specifically configured to: after the sending unit 910 sends the second response to the first access network node, receive the second transmission channel from the first access network node in the third access network. Endpoint information on the node side.
  • the second request includes information of the stream.
  • the device 900 may further include a processing unit 930, configured to determine the flow mapping according to the information of the flow included in the second request, before the sending unit 910 sends the second response to the first access network node. Go to the DRB.
  • the second response further includes indication information indicating a mapping relationship between the flow and the DRB.
  • the second request includes indication information indicating a mapping relationship between the flow and the DRB.
  • the receiving unit 920 is further configured to receive a data packet from the core network
  • the processing unit 930 is configured to obtain, from the data packet, information about a flow to which the data packet belongs;
  • the sending unit 910 is further configured to send information about the stream to the first access network node.
  • the receiving unit 920 is further configured to receive a data packet from the core network
  • the processing unit 930 is further configured to: obtain information about the flow to which the data packet belongs from the data packet, the information of the flow includes the QoS information of the flow, and determine, according to the information of the flow, the flow mapping to the DRB;
  • the sending unit 910 is configured to send, to the first access network node, a third request, where the third request includes indication information indicating a mapping relationship between the flow and the DRB, and the second transmission channel is in the second access Endpoint information on the side of the network node;
  • the receiving unit 920 is specifically configured to receive, from the first access network node, a third response that is responsive to the third request, where the third response includes endpoint information of the second transmission channel on a third access network node side.
  • the receiving unit 920 is further configured to receive configuration information of the at least one protocol layer of the second access network node from the first access network node;
  • the processing unit 930 is configured to configure the DRB according to configuration information of at least one protocol layer of the second access network node.
  • the communication device 900 can be specifically the second access network node in the foregoing embodiment, and the communication device 900 can be used to perform the second and second connections in the foregoing method embodiments.
  • the processes and/or steps corresponding to the network access node are not repeated here to avoid repetition.
  • the device may be specifically a DU, but the embodiment of the present application is not limited thereto.
  • the receiving unit 920 is configured to receive, from the first access network node, endpoint information of the second transmission channel on the second access network node side;
  • the sending unit 910 is configured to send, to the first access network node, endpoint information of the second transmission channel on the third access network node side.
  • the receiving unit 920 is further configured to send, before the sending, the 910, the first access network node the endpoint information of the second transmission channel on the third access network node side, from the first access The network node receives the first request;
  • the sending unit 910 is configured to send, according to the first request, a first response to the first access network node, where the first response includes endpoint information of the second transmission channel on the third access network node side. .
  • the first request includes endpoint information of the second transmission channel on a second access network node side.
  • the first request includes configuration information of at least one protocol layer of the third access network node.
  • the processing unit 930 can be configured to configure the DRB according to the configuration information of the at least one protocol layer.
  • the receiving unit 920 is specifically configured to: after the sending unit 910 sends the first response to the first access network node, receive the second transmission channel from the first access network node in the second access Endpoint information on the side of the network node.
  • the receiving unit 920 is configured to receive a request message from the first access network node, where the request message includes at least one of the following information: information of the SRB, and a transmission channel in the first access network End point information of the node side, configuration information of at least one protocol layer of the control plane of the third access network node, where the transmission channel is a correspondence between the first access network node and the third access network node The transmission channel of the SRB;
  • the sending unit 910 is configured to send a response message to the first access network node, where the response message includes endpoint information of the transmission channel on the third access network node side.
  • the processing unit 930 is configured to configure the SRB according to configuration information of the at least one protocol layer included in the request message.
  • the communication device 900 herein may be specifically the third access network node in the foregoing embodiment, and the communication device 900 may be used to perform the third and third connections in the foregoing method embodiments.
  • the processes and/or steps corresponding to the network access node are not repeated here to avoid repetition.
  • any combination of the device 700, the device 800, and the device 900 described above may be an independent device, or may be integrated in the same device, which is not limited in this embodiment of the present application.
  • FIG. 12 shows another communication device 1100 provided by an embodiment of the present application.
  • the device 1100 includes a sending unit 1110 and a receiving unit 1120.
  • the sending unit 1110 is configured to send a first request to the first target access network node, where the first request includes a transmission channel between the core network and the second source access network node on the core network side. Endpoint information;
  • the receiving unit 1120 is configured to receive, from the first target access network node, a first response that is responsive to the first request, where the first response includes an endpoint of the data forwarding channel corresponding to the terminal device on the second target access network node side. information;
  • the sending unit 1110 is further configured to send first indication information to the second source access network node, where the first indication information includes endpoint information of the data forwarding channel on the second target access network node side, and a third direction
  • the source access network node sends the second indication information, where the second indication information is used to indicate that the third source access network node releases the configuration of the terminal device.
  • the communication device 1100 herein may be specifically the first source access network node in the foregoing embodiment, and the communication device 1100 may be configured to perform the foregoing method and the first embodiment.
  • the processes and/or steps corresponding to the source access network node are not repeated here to avoid repetition.
  • the receiving unit 1120 is configured to receive, by the first source access network node, a first request, where the first request includes a transmission channel between the core network and the second source access network node in the core network.
  • Side endpoint information ;
  • the sending unit 1110 is configured to send, according to the first request received by the receiving unit 1120, a second request to the second target access network node;
  • the receiving unit 1120 is further configured to receive, from the second target access network node, a second response that is sent in response to the second request sent by the sending unit 1110, where the second response includes the data forwarding channel at the second target access End point information on the network side;
  • the sending unit 1110 is further configured to send a first response to the first source access network node, where the first response includes endpoint information of the data forwarding channel on the second target access network side.
  • the communication device 1100 herein may be specifically the first target access network node in the foregoing embodiment, and the communication device 1100 may be configured to perform the foregoing method and the first embodiment.
  • the processes and/or steps corresponding to the target access network node are not repeated here to avoid repetition.
  • unit may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor for executing one or more software or firmware programs (eg, sharing). Processors, proprietary processors or group processors, etc.) and memory, merge logic, and/or other suitable components that support the described functionality.
  • ASIC application specific integrated circuit
  • FIG. 13 shows a communication device 1200 provided by an embodiment of the present application, including: a transceiver 1210 and a processor 1220 and a memory 1230, wherein the transceiver 1210 is configured to transmit and receive data and/or signaling, and the memory 1230 is configured to store The processor 1220 is configured to execute the instructions stored by the memory 1230.
  • the device 1200 may be specifically a CU-C, but the embodiment of the present application is not limited thereto.
  • the transceiver 1210 is configured to:
  • a first response responsive to the first request is received from the third access network node, and a second response responsive to the second request is received from the second access network node.
  • the transceiver 1210 is specifically configured to: after receiving the first response, send a second request to the second access network node, where the second request further includes the second transmission channel at the third access Endpoint information on the side of the network node;
  • the transceiver 1210 is further configured to: after receiving the second response, send, to the third access network node, endpoint information of the second transmission channel on the second access network node side.
  • the transceiver 1210 is specifically configured to: after receiving the second response, send a first request to a third access network node, where the first request further includes a second transmission channel at the second access Endpoint information on the side of the network node;
  • the transceiver 1210 is further configured to: after receiving the second response, send, to the second access network node, endpoint information of the second transmission channel on the third access network node side.
  • the execution of the instructions stored in the memory 1230 causes the processor to obtain QoS information of the stream and QoS information according to the stream before the transceiver 1210 sends the second request to the second access network node. Determine the mapping relationship between the DRB and the flow.
  • the transceiver 1210 is configured to send, to the second access network node, endpoint information of the second transmission channel at the third access network node, and send the second transmission channel to the third access network node. Endpoint information at the second access network node.
  • the transceiver 1210 is further configured to receive, from the second access network node, endpoint information of the second transmission channel at the second access network node, and receive the second transmission channel from the third access network node in the third access network. Endpoint information at the node.
  • the transceiver 1210 can be configured to send a first request to a third access network node, and correspondingly, the transceiver 1210 can be configured to receive, from the third access network node, the response sent by the transceiver 1210. The first response of the first request.
  • the first response includes endpoint information of the second transmission channel at the third access network node.
  • the transceiver 1220 can be configured to send a second request to the second access network node, the transceiver 1210 configured to receive a second response in response to the second request from the second access network node.
  • the second response includes endpoint information of the second transmission channel at the second access network node.
  • the transceiver 1210 is specifically configured to: after receiving the first response, send a second request to the second access network node, where the second request further includes the second transmission channel at the third access Endpoint information on the side of the network node;
  • the transceiver 1210 is further configured to send the endpoint information of the second transmission channel on the second access network node side to the third access network node after the transceiver 1210 receives the second response.
  • the transceiver 1210 is specifically configured to: after receiving the second response, send a first request to a third access network node, where the first request further includes a second transmission channel at the second access Endpoint information on the side of the network node;
  • the transceiver 1210 is further configured to: after receiving the second response, send, to the second access network node, endpoint information of the second transmission channel on the third access network node side.
  • the processor 1220 is configured to obtain QoS information of the flow, and determine, according to the QoS information of the flow, a mapping relationship between the DRB and the flow, where the second request includes a first indication indicating the mapping relationship. information.
  • the second request includes QoS information of the flow
  • the second response includes first indication information indicating the mapping relationship.
  • the transceiver 1210 is configured to receive a third request from the second access network node and send a third response in response to the third request to the second access network node.
  • the third request includes first indication information indicating a mapping relationship between the DRB and the flow, and endpoint information of the second transmission channel at the second access network node.
  • the transceiver 1210 is configured to send a request message to the third access network node, where the request message includes at least one of the following information: information of the SRB, and a transmission channel at the first access network node Endpoint information of the side, configuration information of at least one protocol layer of the third access network node, where the transmission channel is corresponding to the SRB between the first access network node and the third access network node Transmission channel
  • the transceiver 1210 is configured to receive, from the third access network node, a response message in response to the request message, where the response message includes endpoint information of the transmission channel on the third access network node side.
  • the communication device 1200 can be specifically the first access network node in the foregoing embodiment, and the communication device 1200 can be used to perform the first connection in the foregoing method embodiment.
  • the processes and/or steps corresponding to the network access node are not repeated here to avoid repetition.
  • the device may be specifically a CU-U, but the embodiment of the present application is not limited thereto.
  • the transceiver 1210 is configured to send, to the first access network node, endpoint information of the second transmission channel on the second access network node side, where the second transmission channel is the second access network node and the A transmission channel corresponding to the data radio bearer DRB between the third access network node, and receiving end point information of the second transmission channel on the third access network node side from the first access network node.
  • the transceiver 1210 is further configured to receive the second access channel node from the first access network node before sending the second access channel to the first access network node. request;
  • the transceiver 1210 is specifically configured to send, according to the second request, a second response to the first access network node, where the second response includes endpoint information of the second transmission channel on the second access network node side .
  • the second request includes endpoint information of the first transmission channel on the core network side
  • the second response further includes endpoint information of the first transmission channel on the second access network node side.
  • the second request includes endpoint information of the second transmission channel on a third access network node side.
  • the second access network node receives the endpoint information of the second transmission channel on the third access network node side from the first access network node, including:
  • the transceiver 1210 is specifically configured to: after sending the second response to the first access network node, receive, from the first access network node, an endpoint of the second transmission channel on a third access network node side. information.
  • the second request includes information of the stream.
  • the processor 1220 is configured to determine, according to information of the flow included in the second request, the flow mapping to the DRB before the transceiver 1210 sends the second response to the first access network node.
  • the second response further includes indication information indicating a mapping relationship between the flow and the DRB.
  • the second request includes indication information indicating a mapping relationship between the flow and the DRB.
  • the transceiver 1210 is further configured to receive a data packet from the core network
  • the processor 1220 is configured to obtain, from the data packet, information about a flow to which the data packet belongs;
  • the transceiver 1210 is further configured to send information of the flow to the first access network node.
  • the transceiver 1210 is further configured to receive a data packet from the core network
  • the processor 1220 is further configured to: obtain information about the flow to which the data packet belongs from the data packet, the information of the flow includes QoS information of the flow, and determine, according to the information of the flow, the flow mapping to the DRB;
  • the transceiver 1210 is configured to send a third request to the first access network node, where the third request includes indication information indicating a mapping relationship between the flow and the DRB, and the second transmission channel is in the second access Endpoint information on the side of the network node;
  • the transceiver 1210 is specifically configured to receive, from the first access network node, a third response that is responsive to the third request, where the third response includes endpoint information of the second transmission channel on a third access network node side.
  • the transceiver 1210 is further configured to receive configuration information of the at least one protocol layer of the second access network node from the first access network node;
  • the processor 1220 is configured to configure the DRB according to configuration information of at least one protocol layer of the second access network node.
  • the communication device 1200 can be specifically the second access network node in the foregoing embodiment, and the communication device 1200 can be used to perform the second and second connections in the foregoing method embodiments.
  • the processes and/or steps corresponding to the network access node are not repeated here to avoid repetition.
  • the device may be specifically a DU, but the embodiment of the present application is not limited thereto.
  • the transceiver 1210 is configured to receive, from the first access network node, endpoint information of the second transmission channel on the second access network node side, and send the information to the first access network node.
  • the transceiver 1210 is further configured to receive, before sending, to the first access network node, end information of the second transmission channel on the third access network node side, receive the first access node from the first access network node. a request;
  • the transceiver 1210 is configured to send, according to the first request, a first response to the first access network node, where the first response includes endpoint information of the second transmission channel on the third access network node side. .
  • the first request includes endpoint information of the second transmission channel on a second access network node side.
  • the first request includes configuration information of at least one protocol layer of the third access network node.
  • the processor 1220 can be configured to configure the DRB according to the configuration information of the at least one protocol layer.
  • the transceiver 1210 is specifically configured to: after the transceiver 1210 sends the first response to the first access network node, receive the second transmission channel from the first access network node in the second access Endpoint information on the side of the network node.
  • the transceiver 1210 is configured to receive a request message from the first access network node, the request message including at least one of the following information: information of the SRB, the transmission channel at the first access network node Side endpoint information, configuration information of at least one protocol layer of a control plane of the third access network node, wherein the transmission channel is a correspondence between the first access network node and the third access network node The transmission channel of the SRB;
  • the transceiver 1210 is configured to send a response message to the first access network node, where the response message includes endpoint information of the transmission channel on the third access network node side.
  • the processor 1220 is configured to configure the SRB according to configuration information of the at least one protocol layer included in the request message.
  • the communication device 1200 herein may be specifically the third access network node in the foregoing embodiment, and the communication device 1200 may be configured to perform the third and third connections in the foregoing method embodiments.
  • the processes and/or steps corresponding to the network access node are not repeated here to avoid repetition.
  • the transceiver 1210 is configured to:
  • the first target access network node Receiving, by the first target access network node, a first response that is responsive to the first request, where the first response includes endpoint information of a data forwarding channel corresponding to the terminal device on a second target access network node side;
  • the second indication information is used to indicate that the third source access network node releases the configuration of the terminal device.
  • the communication device 1200 may be specifically the first source access network node in the foregoing embodiment, and the communication device 1200 may be used to perform the foregoing method and the first embodiment.
  • the processes and/or steps corresponding to the source access network node are not repeated here to avoid repetition.
  • the transceiver 1210 is configured to:
  • the first source access network node Receiving, by the first source access network node, a first request, where the first request includes end point information of a transmission channel between the core network and the second source access network node on a core network side;
  • the communication device 1200 herein may be specifically the first target access network node in the foregoing embodiment, and the communication device 1200 may be used to perform the foregoing method and the first embodiment.
  • the processes and/or steps corresponding to the target access network node are not repeated here to avoid repetition.
  • the processor may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital uplink signal processors (DSPs), and application specific integrated circuits ( ASIC), off-the-shelf programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and more.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the memory can include read only memory and random access memory and provides instructions and data to the processor.
  • a portion of the memory may also include a non-volatile random access memory.
  • the memory can also store information of the device type.
  • the processor can be used to execute instructions stored in the memory, and when the processor executes the instructions, the processor can perform the steps corresponding to the terminal device in the above method embodiments.
  • the embodiment of the present application further provides a radio access network, where the radio access network may include a first access network node, a second access network node, and a third access network node, and the specific implementation may be as described above. For the sake of brevity, we will not repeat them here.
  • the radio access network may include a CU-C, a CU-U, and a DU.
  • the specific architecture may be as shown in FIG. 2, but the embodiment of the present application is not limited thereto.
  • the embodiment of the present application further provides a processing apparatus, including a processor and an interface;
  • the processor is configured to perform the methods in the various embodiments of the present application described above.
  • the processing device may be a chip, and the processor may be implemented by hardware or by software.
  • the processor When implemented by hardware, the processor may be a logic circuit, an integrated circuit, or the like; when implemented by software, the processing may be performed.
  • the device can be implemented as a general purpose processor by reading software code stored in the memory, which can be integrated in the processor and can exist independently of the processor.
  • the processing device may be a field-programmable gate array (FPGA), may be an application specific integrated circuit (ASIC), or may be a system on chip (SoC). It can be a central processor unit (CPU), a network processor (NP), a digital signal processor (DSP), or a microcontroller. Unit, MCU), can also be a programmable logic device (PLD) or other integrated chip.
  • FPGA field-programmable gate array
  • ASIC application specific integrated circuit
  • SoC system on chip
  • CPU central processor unit
  • NP network processor
  • DSP digital signal processor
  • MCU can also be a programmable logic device (PLD) or other integrated chip.
  • PLD programmable logic device
  • each step of the above method may be completed by an integrated logic circuit of hardware in a processor or an instruction in a form of software.
  • the steps of the method disclosed in the embodiments of the present application may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in a memory, and the processor executes instructions in the memory, in combination with hardware to perform the steps of the above method. To avoid repetition, it will not be described in detail here.
  • system and “network” are used interchangeably herein.
  • the term “and/or” in this context is merely an association describing the associated object, indicating that there may be three relationships, for example, A and / or B, which may indicate that A exists separately, and both A and B exist, respectively. B these three situations.
  • the character "/" in this article generally indicates that the contextual object is an "or" relationship.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the computer program product includes one or more computer instructions.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media.
  • the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)) or the like.
  • a magnetic medium eg, a floppy disk, a hard disk, a magnetic tape
  • an optical medium eg, a DVD
  • a semiconductor medium eg, a solid state disk (SSD)

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Abstract

本申请提供了一种通信方法和装置以及无线接入网络，能够适用于接入网设备功能分离的场景。该方法包括：第一接入网节点从第二接入网节点获取第二传输通道在该第二接入网节点侧的端点信息，其中，该第二传输通道为该第二接入网节点与第三接入网节点之间的对应于 DRB 的传输通道；该第一接入网节点从该第三接入网节点获取该第二传输通道在该第三接入网节点侧的端点信息；该第一接入网节点向该第二接入网节点发送该第二传输通道在该第三接入网节点侧的端点信息；该第一接入网节点向该第三接入网节点发送该第二传输通道在该第二接入网节点侧的端点信息。

Description

通信方法和装置以及无线接入网络
本申请要求于2017年6月12日提交中国专利局、申请号为201710436650.4、申请名称为“通信方法和装置以及无线接入网络”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
本申请涉及通信领域，并且更具体地，涉及通信方法和装置以及无线接入网络。
背景技术
在云无线接入网(cloud radio access network，CRAN)架构下，基站可以划分为控制单元(control unit，CU)和数据单元(data unit，DU)，或者，CU也可以称为中心单元(central unit，CU)，DU也可以称为分布单元(distribute unit，DU)，其中，CU可以具有部分或全部无线资源控制(radio resource control，RRC)功能，或进一步具有RRC层以下的一个或多个协议层功能，DU可以具有部分或全部物理层功能，或者进一步具有物理层以上的一个或多个协议层功能。此外，CU内部还可以实现用户面(user plane，UP)和控制面(control plane，CP)功能的分离。伴随着上述功能的划分，接入网设备之间的接口增多，现有的CU与DU间的通信方案不再适用。
发明内容
本申请提供一种通信方法和通信装置，能够适用于接入网设备功能分离的场景。
第一方面，提供了一种通信方法，包括：第一接入网节点可以获取第二传输通道在第二接入网节点处的端点信息以及该第二传输通道在第三接入网节点处的端点信息，并向该第三接入网节点发送该第二传输通道在第二接入网节点处的端点信息，以及向该第二接入网节点发送该第二传输通道在第三接入网节点处的端点信息。
该通信方法能够在第二接入网节点与第三接入网节点之间建立DRB的传输通道，实现用户面的建立。
可选地，第一接入网节点向第三接入网节点发送第一请求，并从该第三接入网节点接收响应于该第一请求的第一响应。
在第一方面的一种可能的实现方式中，第一接入网节点向第二接入网节点发送第二请求，以及从该第二接入网节点接收响应于该第二请求的第二响应。
此时，可选地，该DRB的传输通道的建立可以是由第一接入网节点发起的。
可选地，该第一请求和第二请求可以用于请求在第二接入网节点与第三接入网节点之间建立DRB的传输通道，即请求建立第二传输通道。
可选地，在核心网侧，该DRB可以对应于E-RAB或PDU会话。
可选地，该第一响应和第二响应可以分别包含该DRB的传输通道在第三接入网节点 和第二接入网节点处的配置信息，例如端点信息。
可选地，该第一响应可以包含该DRB的第二传输通道在第三接入网节点处的端点信息，该第二响应可以包含该DRB的第二传输通道在第二接入网节点处的端点信息，例如TEID。
可选地，该第一接入网节点向第二接入网节点发送第二请求，包括：该第一接入网节点在接收到该第一响应之后，向第二接入网节点发送第二请求，其中，该第二请求包含第二传输通道在该第三接入网节点侧的端点信息。
此时，该第一接入网节点在从该第二接入网节点接收响应于该第二请求的第二响应之后，可以向该第三接入网节点发送该第二传输通道在该第二接入网节点侧的端点信息。
此时，该第一接入网节点先向第三接入网节点发送第一请求，并在接收到第一响应之后，向第二接入网节点发送第二请求。
可选地，该第一接入网节点向第三接入网节点发送第一请求，包括：该第一接入网节点在接收到该第二响应之后，向第三接入网节点发送第一请求，其中，该第一请求包含第二传输通道在该第二接入网节点侧的端点信息。
此时，该第一接入网节点可以在从该第一接入网节点接收响应于该第一请求的第一响应之后，向该第二接入网节点发送该第二传输通道在该第三接入网节点侧的端点信息。
此时，该第一接入网节点先向第二接入网节点发送第二请求，并在接收到第二响应之后向第三接入网节点发送第一请求。
在第一方面的一种可能的实现方式中，该第一接入网节点从第二接入网节点获取第二传输通道在该第二接入网节点侧的端点信息，包括：该第一接入网节点接收该第二接入网节点发送的第三请求，该第三请求包含指示该DRB与流之间的映射关系的第一指示信息以及该第二传输通道在该第二接入网节点侧的端点信息；该第一接入网节点向该第二接入网节点发送该第二传输通道在该第三接入网节点侧的端点信息，包括：该第一接入网节点根据该第三请求，向该第二接入网节点发送第三响应。
此时，可选地，该DRB的传输通道的建立可以是由第二接入网节点发起的。
可选地，该第三响应包含该第二传输通道在该第三接入网节点侧的端点信息。
可选地，该第一接入网节点可以在接收到该第三请求之后，向第三接入网节点发送第一请求。
可选地，该第一接入网节点可以在接收到该第一响应之后，向该第二接入网节点发送该第三响应。
可选地，该第一接入网节点还可以通过该第三接入网节点向终端设备发送第二指示信息，该第二指示信息用于指示该DRB与流之间的映射关系。
该第二指示信息可以用于指示映射到该DRB的至少一个流。
可选地，在向第二接入网节点发送第二请求之前，该方法还包括：该第一接入网节点获取流的QoS信息；该第一接入网节点根据该流的QoS信息，确定该流映射到该DRB。
此时，可选地，该第二请求可以包含第一指示信息，该第一指示信息指示该DRB与该流之间的映射关系。
可选地，该第一接入网节点可以从核心网获取流的QoS信息。例如，该第一接入网节点可以从核心网接收包含该流的QoS信息的控制信令。
可选地，该第一接入网节点也可以从第二接入网节点获取流的QoS信息。例如，第一接入网节点可以从第二接入网节点获取包含流的QoS信息的信令。
可选地，该第一接入网节点在获取到该流的QoS信息以后，可以对该流进行准入控制，并且在确定接受该流之后，向第二接入网节点发送该第二请求。
可选地，该方法还包括：该第一接入网节点从第二接入网节点接收用于指示该DRB与流之间的映射关系的第一指示信息。
第二方面，提供了另一种通信方法，包括：第二接入网节点向第一接入网节点发送第二传输通道在该第二接入网节点侧的端点信息；该第二接入网节点从该第一接入网节点接收该第二传输通道在第三接入网节点侧的端点信息。
在第二方面的一种可能的实现方式中，第二接入网节点可以从第一接入网节点接收第二请求，该第二接入网节点根据该第二请求，向该第一接入网节点发送第二响应。
可选地，该第二响应包含第二传输通道在该第二接入网节点侧的端点信息。
可选地，该第二接入网节点可以在向第一接入网节点发送第二传输通道在该第二接入网节点侧的端点信息之后，从该第一接入网节点接收第二传输通道在该第三接入网节点侧的端点信息。
可选地，该第二请求可以包含第二传输通道在该第三接入网节点侧的端点信息。此时，该第二接入网节点在接收到第二传输通道在该第三接入网节点侧的端点信息之后，向第一接入网节点发送第二传输通道在该第二接入网节点侧的端点信息。
在第二方面的一种可能的实现方式中，该第二接入网节点可以向该第一接入网节点发送第三请求，该第三请求包含指示流与该DRB之间的映射关系的指示信息以及该第二传输通道在该第二接入网节点侧的端点信息。
此时，可选地，该第二接入网节点从该第一接入网节点接收响应于该第三请求的第三响应，该第三响应包含该第二传输通道在第三接入网节点侧的端点信息。
第三方面，提供了另一种通信方法，包括：第三接入网节点从第一接入网节点接收第二传输通道在第二接入网节点侧的端点信息；该第三接入网节点向该第一接入网节点发送该第二传输通道在该第三接入网节点侧的端点信息。
可选地，第三接入网节点从第一接入网节点接收第一请求；该第三接入网节点根据该第一请求，向该第一接入网节点发送第一响应。
可选地，该第一响应包含该第二传输通道在该第三接入网节点侧的端点信息。
可选地，该第三接入网节点可以在向该第一接入网节点发送该第二传输通道在该第三接入网节点侧的端点信息之后，从第一接入网节点接收到第二传输通道在第二接入网节点侧的端点信息。
可选地，该第一请求包含该第二传输在第二接入网节点侧的端点信息。此时，该第三接入网节点在从第一接入网节点接收到第二传输通道在第二接入网节点侧的端点信息之后，向该第一接入网节点发送该第二传输通道在该第三接入网节点侧的端点信息。
第四方面，提供了另一种通信方法，包括：第一接入网节点向第三接入网节点发送请求消息；该第一接入网节点从该第三接入网节点接收响应于该请求消息的响应消息。
第五方面，提供了另一种通信方法，包括：第三接入网节点从第一接入网节点接收请求消息；该第三接入网节点根据该请求消息，配置SRB；该第三接入网节点向该第一接入 网节点发送响应消息。
在第五方面的一种可能的实现方式中，该请求消息用于建立SRB的传输通道。
可选地，该请求消息包含下列信息中的至少一种：SRB的信息、传输通道在该第一接入网节点侧的端点信息、该第三接入网节点的至少一个协议层的配置信息，其中，该传输通道为该第一接入网节点与该第三接入网节点之间的对应于该SRB的通道。
可选地，请求消息中包含的传输通道在该第一接入网节点侧的端点信息可以具体包括UL GTP-U TEID和/或传输层地址，例如IP地址。
可选地，该SRB的信息可以包括SRB的标识信息。
可选地，该响应消息可以包含该第三传输通道在该第三接入网节点侧的端点信息，例如DL GTP-U TEID和/或IP地址。
因此，该通信方法能够在第一接入网节点与第三接入网节点之间建立SRB的传输通道，实现控制面的建立。
第六方面，提供了另一种通信方法，包括：第一源接入网节点向第一目标接入网节点发送第一切换请求，该第一切换请求包含核心网与第二源接入网节点之间的传输通道在核心网侧的端点信息；该第一源接入网节点从该第一目标接入网节点接收第一切换响应，该第一切换响应包含该终端设备对应的数据转发通道在第二目标接入网节点侧的端点信息；该第一源接入网节点向该第二源接入网节点发送第一指示信息，该第一指示信息包含该数据转发通道在该第二目标接入网节点侧的端点信息；该第一源接入网节点向第三源接入网节点发送第二指示信息，该第二指示信息用于指示该第三源接入网节点释放该终端设备的配置。
第七方面，提供了另一种通信方法，包括：第一目标接入网节点从第一源接入网节点接收第一切换请求，该第一切换请求包含核心网与第二源接入网节点之间的传输通道在核心网侧的端点信息；该第一目标接入网节点根据该第一切换请求，向该第二目标接入网节点发送第二切换请求；该第一目标接入网节点从该第二目标接入网节点接收响应于该第二切换请求的第二切换响应，该第二切换响应包含该数据转发通道在该第二目标接入网侧的端点信息；该第一目标接入网节点向该第一源接入网节点发送第一切换响应，该第一切换响应包含该数据转发通道在该第二目标接入网侧的端点信息。
第八方面，提供了一种通信装置，用于执行上述第一方面或第一方面的任意可能的实现方式中的方法。
具体地，该装置包括用于执行上述第一方面或第一方面的任意可能的实现方式中的方法的单元。
第九方面，提供了另一种通信装置，用于执行上述第二方面或第二方面的任意可能的实现方式中的方法。
具体地，该装置包括用于执行上述第二方面或第二方面的任意可能的实现方式中的方法的单元。
第十方面，提供了另一种通信装置，用于执行上述第三方面或第三方面的任意可能的实现方式中的方法。
具体地，该装置包括用于执行上述第三方面或第三方面的任意可能的实现方式中的方法的单元。
第十一方面，提供了另一种通信装置，用于执行上述第四方面或第四方面的任意可能的实现方式中的方法。
具体地，该装置包括用于执行上述第四方面或第四方面的任意可能的实现方式中的方法的单元。
第十二方面，提供了另一种通信装置，用于执行上述第五方面或第五方面的任意可能的实现方式中的方法。
具体地，该装置包括用于执行上述第五方面或第五方面的任意可能的实现方式中的方法的单元。
第十三方面，提供了另一种通信装置，用于执行上述第六方面或第六方面的任意可能的实现方式中的方法。
具体地，该装置包括用于执行上述第六方面或第六方面的任意可能的实现方式中的方法的单元。
第十四方面，提供了另一种通信装置，用于执行上述第七方面或第七方面的任意可能的实现方式中的方法。
具体地，该装置包括用于执行上述第七方面或第七方面的任意可能的实现方式中的方法的单元。
第十五方面，提供了另一种通信装置，包括：存储器和处理器，该存储器用于存储指令，该处理器用于执行该存储器存储的指令，并且当该处理器执行该存储器存储的指令时，该执行使得该处理器执行第一方面或第一方面的任意可能的实现方式中的方法。
第十六方面，提供了另一种通信装置，包括：存储器和处理器，该存储器用于存储指令，该处理器用于执行该存储器存储的指令，并且当该处理器执行该存储器存储的指令时，该执行使得该处理器执行第二方面或第二方面的任意可能的实现方式中的方法。
第十七方面，提供了另一种通信装置，包括：存储器和处理器，该存储器用于存储指令，该处理器用于执行该存储器存储的指令，并且当该处理器执行该存储器存储的指令时，该执行使得该处理器执行第三方面或第三方面的任意可能的实现方式中的方法。
第十八方面，提供了另一种通信装置，包括：存储器和处理器，该存储器用于存储指令，该处理器用于执行该存储器存储的指令，并且当该处理器执行该存储器存储的指令时，该执行使得该处理器执行第四方面或第四方面的任意可能的实现方式中的方法。
第十九方面，提供了另一种通信装置，包括：存储器和处理器，该存储器用于存储指令，该处理器用于执行该存储器存储的指令，并且当该处理器执行该存储器存储的指令时，该执行使得该处理器执行第五方面或第五方面的任意可能的实现方式中的方法。
第二十方面，提供了另一种通信装置，包括：存储器和处理器，该存储器用于存储指令，该处理器用于执行该存储器存储的指令，并且当该处理器执行该存储器存储的指令时，该执行使得该处理器执行第六方面或第六方面的任意可能的实现方式中的方法。
第二十一方面，提供了另一种通信装置，包括：存储器和处理器，该存储器用于存储指令，该处理器用于执行该存储器存储的指令，并且当该处理器执行该存储器存储的指令时，该执行使得该处理器执行第七方面或第七方面的任意可能的实现方式中的方法。
第二十二方面，提供了一种计算机可读存储介质，所述计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机执行上述任一方面所述的通信方法。
第二十三方面，提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述任一方面所述的通信方法。
第二十四方面，提供了一种无线接入网络，包括第八方面或第八方面的任一种可能的实现方式中的装置、第九方面或第九方面的任一种可能的实现方式中的装置以及第十方面或第十方面的任一种可能的实现方式中的装置。或者，包括第十五方面或第十五方面的任一种可能的实现方式中的装置、第十六方面或第十六方面的任一种可能的实现方式中的装置以及第十七方面或第十七方面的任一种可能的实现方式中的装置。
第二十五方面，提供了另一种无线接入网络，包括第十一方面或第十一方面的任一种可能的实现方式中的装置以及第十二方面或第十二方面的任一种可能的实现方式中的装置。或者，包括第十八方面或第十八方面的任一种可能的实现方式中的装置以及第十九方面或第十九方面的任一种可能的实现方式中的装置。
第二十六方面，提供了另一种无线接入网络，包括第十三方面或第十三方面的任一种可能的实现方式中的装置以及第十四方面或第十四方面的任一种可能的实现方式中的装置。或者，包括第二十方面或第二十方面的任一种可能的实现方式中的装置以及第二十一方面或第二十一方面的任一种可能的实现方式中的装置。
第二十七方面，提供了一种处理装置，包括处理器和接口；其中，该处理器用于执行上述任意方面的方法。
可选地，该处理装置可以是一个芯片。
在本申请的某些方面，第一请求包含该第三接入网节点的至少一个协议层的配置信息。
可选地，该至少一个协议层的配置信息与该DRB关联。
可选地，该第三接入网节点可以根据该第一请求中包含的协议层的配置信息，配置该DRB。
在本申请的某些方面，第二请求包含该第二接入网节点的至少一个协议层的配置信息。
可选地，该至少一个协议层的配置信息与该DRB关联。
可选地，该第二接入网节点可以根据该第一请求中包含的协议层的配置信息，配置该DRB。
在本申请的某些方面，该第二请求包含第一传输通道在核心网侧的端点信息。该第一传输通道为该核心网与该第二接入网节点之间的对应于该DRB的传输通道。
可选地，该第一传输通道可以具体为对应于该DRB的PDU会话的传输通道，或者为对应于该DRB的E-RAB的传输通道。
该第二传输通道可以具体为该DRB的传输通道。
可选地，该第二响应还包含该第一传输通道在该第二接入网节点侧的端点信息。
在本申请的某些方面，核心网可以通过控制面消息向第一接入网节点发送流的信息。
可选地，第一接入网节点在从核心网获取流的信息之后，可以根据该流的信息，确定该流映射到该DRB，并向该第二接入网节点发送指示该流与该DRB之间的映射关系的第一指示信息。
可选地，该第二请求包含该第一指示信息。
可选地，该第一接入网节点可以向该第二接入网节点发送该流的信息。该第二接入网节点在从该第一接入网节点获取到流的信息之后，可以根据该流的信息，确定该流映射到该DRB，并向该第一接入网节点发送指示该流与该DRB之间的映射关系的第一指示信息。
可选地，该第二请求包含该流的信息，该第二响应包含该第一指示信息。
在本申请的某些方面，核心网可以向第二接入网节点发送数据包，第二接入网节点可以从接收到的数据包中获取该数据包所属流的信息。
可选地，该第二接入网节点可以根据从该数据包中获取的流的信息，确定该流映射到该DRB，并向该第一接入网节点发送指示该流与该DRB之间的映射关系的第一指示信息。
可选地，在该第二接入网节点发送第一指示信息之前，该第二接入网节点还可以对该流执行准入控制，并且在确定接受该流之后，向该第一接入网节点发送该第一指示信息。
可选地，该第一接入网节点接收到该第一指示信息以后，可以对该流进行准入控制，并且在确定接受该流之后，向该第二接入网节点发送该第二传输通道在该第三接入网节点处的端点信息。
可选地，该第一接入网节点或第二接入网节点在确定不接受该流或拒绝该流的情况下，可以向核心网发送指示拒绝该流的第三指示信息。作为一个例子，该第一接入网节点或第二接入网节点可以向核心网发送该流的信息，例如该流的标识。
可选地，该第三请求包含该第一指示信息。
可选地，该第二接入网节点可以向该第一接入网节点发送从该数据包获取到的流的信息。该第一接入网节点在从该第二接入网节点获取到流的信息之后，可以根据该流的信息，确定该流映射到该DRB，并向该第二接入网节点发送指示该流与该DRB之间的映射关系的第一指示信息。
可选地，流的信息可以包括流的QoS信息。
在本申请的某些方面，端点信息可以具体包括UL GTP-U TEID和传输层地址中的至少一项。
可选地，传输层地址可以具体为IP地址。
在本申请的某些方面，该第一切换请求中包含的核心网与第二源接入网节点之间的传输通道在核心网侧的端点信息可以具体包括UL GTP-U TEID和/或传输层地址。
在本申请的某些方面，该数据转发通道的端点信息可以包括用于转发上行数据的通道的端点信息和/或用于转发下行数据的通道的端点信息。
在本申请的某些方面，接入网设备分离成中心节点和中心节点控制的分布节点。
在本申请的某些方面，第一接入网节点和第二接入网节点共同作为中心节点，第三接入网节点用作分布节点，其中，第一接入网节点具有中心节点的控制面功能，第二接入网节点具有中心节点的用户面功能。
在本申请的某些方面，第一接入网节点可以具体为CU-C，第二接入网节点可以具体为CU-U，第三接入网节点可以具体为DU。
附图说明
图1是本申请实施例的应用场景示例的示意图。
图2是本申请实施例的应用场景中的接入网设备的功能分离示例的示意图。
图3是本申请实施例提供的通信方法的示意性流程图。
图4是本申请实施例提供的另一通信方法的示意性流程图。
图5是本申请实施例提供的另一通信方法的示意性流程图。
图6是本申请实施例提供的另一通信方法的示意性流程图。
图7是本申请实施例提供的另一通信方法的示意性流程图。
图8是本申请实施例提供的另一通信方法的示意性流程图。
图9是本申请实施例提供的另一通信方法的示意性流程图。
图10是本申请实施例提供的通信装置的示意性框图。
图11是本申请实施例提供的另一通信装置的示意性框图。
图12是本申请实施例提供的另一通信装置的示意性框图。
图13是本申请实施例提供的另一通信装置的示意性框图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
本申请实施例的技术方案可以应用于各种接入网设备的功能分离的通信系统，例如：全球移动通讯(global system of mobile communication，GSM)系统、码分多址(code division multiple access，CDMA)系统、宽带码分多址(wideband code division multiple access，WCDMA)系统、通用分组无线业务(general packet radio service，GPRS)、长期演进(long term evolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)、通用移动通信系统(universal mobile telecommunication system，UMTS)、全球互联微波接入(worldwide interoperability for microwave access，WiMAX)通信系统、未来演进的公共陆地移动网络(public land mobile network，PLMN)或新空口(new radio，NR)、演进LTE(evolved LTE，eLTE)等未来的5G系统等。
为了便于理解，下面以本申请实施例应用于5G系统中的CRAN场景为例进行描述，但本申请实施例还可以应用于其他接入网设备的功能分离的场景。例如，在LTE系统中，存在射频拉远场景(即基带模块和射频模块分离)、双连接(dual connection，DC)场景、宏-微站场景、LTE与Wifi聚合(LTE-Wifi Aggregation,LWA)场景，等等；在5G系统中，存在各种非小区(non-cell)场景(终端设备可以在各个小区之间自由切换，各个小区之间没有明确的界线)、虚拟化场景，等等；或者，本申请也可以适用于不同系统/制式共存的场景，本申请实施例对此不做限定。
本申请实施例应用的无线通信系统可以包括核心网(central network，CN)和无线接入网(radio access network，RAN)，CN和RAN之间可以建立协议数据单元(protocol data unit，PDU)会话(session)，其中，PDU session可以由用户面的至少一个业务数据流组成。在RAN侧，根据不同的服务质量(quality of service，QoS)要求，数据流可以映射成数据无线承载(data radio bearer，DRB)。PDU session、数据流和DRB之间的映射关系示例可以如图1所示。
在该无线通信系统中，接入网设备可以分离成至少两个接入网节点，其中，该至少两个接入网节点之间可以存在标准或非标准的接口。
应理解，在本申请实施例中，接入网设备可以是与终端设备通信的设备。接入网设备可以为特定的地理区域提供通信覆盖，并且可以与位于该覆盖区域内的终端设备(例如UE)进行通信。可选地，该接入网设备可以是GSM系统或CDMA系统中的基站(base transceiver station，BTS)，也可以是WCDMA系统中的基站(NodeB，NB)，还可以是LTE系统中的演进型基站(evolved Node B，eNB或eNodeB)，或者是云无线接入网络(cloud radio access network，CRAN)中的无线控制器，或者该网络设备可以为中继站、接入点(access point，AP)、车载设备、可穿戴设备、未来5G网络中的gNB或传输点等网络侧设备、或者未来演进的PLMN中的网络设备等。
还应理解，在本申请实施例中，终端设备可以是移动的或固定的。该终端设备可以指接入终端、用户设备(user equipment，UE)、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。接入终端可以是蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备、未来5G网络中的终端设备或者未来演进的PLMN中的终端设备等。
作为一个例子，在CRAN场景下，接入网设备可以分离成控制单元(control unit，CU)和数据单元(data unit，DU)，或者也可以称为中心单元(central unit，CU)和分布单元(distributed unit，DU)，或者也可以具有其他名称，本申请实施例对此名称不做限定。其中，CU可以具有部分或全部无线资源控制(radio resource control，RRC)功能，或进一步具有RRC层以下的一个或多个协议层功能。例如，CU可以只具有部分或全部RRC层功能，或者具有RRC层以及部分或全部分组数据汇聚协议(packet data convergence protocol，PDCP)层功能，或者具有RRC层、PDCP层以及部分或全部无线链路控制(radio link control，RLC)层功能；或者具有RRC层、PDCP层、RLC层以及部分或全部媒体访问控制(media access control，MAC)层功能，或者还可以进一步具有部分物理(PHY)层功能，本申请实施例对此不做限定。
可选地，DU可以具有部分或全部PHY层功能，或者进一步具有PHY层以上的一个或多个协议层功能。例如，DU可以具有部分或全部RRC层以及PDCP层、RLC层、MAC层和PHY层功能，或者具有部分或全部PDCP层以及RLC层、MAC层和PHY层功能，或者具有部分或全部RLC层以及MAC层和PHY层功能，或者仅具有全部或者部分PHY层功能，本申请实施例对此不做限定。
此外，为了实现CU内部的用户面(user plane，UP)功能和控制面(control plane，CP)功能分离，可以将CU可以划分为CU中的用户面(user plane in CU，CU-U)实体和CU中的控制面(control plane in CU，CU-C)实体。其中，CU-C可以负责CU中的控制相关信息的处理和传输，CU-U可以负责DU中的数据相关信息的处理和传输。
图2示出了DU、CU-C和CU-U的协议栈的一种可能实现方式。如图2所示，CU和DU的切分在PDCP/RLC层。DU包括PHY层、MAC层和RLC层，CU包括PDCP层及其以上的层。在CU，分为CU-C和CU-U两部分，CU-C包括PDCP层和RRC层，CU-U包括PDCP层和新增的业务数据适配协议(service data adaptation protocol，SDAP)层， 其中，SDAP层可以负责QoS相关的接入，包括QoS流到DRB的路由、上下行QoS流的标识(ID)确认等等。CU和DU的分离增加了CU和DU之间的接口F1，CU侧用户面和控制面的分离增加了CU-C和CU-U之间的接口Xy，并可以将CU和DU之间的接口F1进一步划分为F1-C(控制面接口)和F1-U(用户面接口)。应理解，上述各个接口名称是示例性的，而非限定性的，上述各个接口还可以具有其他名称，本申请实施例对此不做限定。
伴随着CU-DU的划分以及CU侧用户面和控制面的分离，现有的一些方案将不再适用，例如，如何实现用户面和控制面的建立以及终端设备的切换等过程还尚未解决。
应理解，图2的例子是为了帮助本领域技术人员更好地理解本申请实施例，而非要限制本申请实施例的范围。本领域技术人员根据所给出的上述示例，显然可以进行各种等价的修改或变化，这样的修改或变化也属于本申请实施例的适用范围。
还应理解，在以下实施例的描述中，第一接入网节点、第二接入网节点和第三接入网节点可以用于共同实现接入网设备的功能。具体地，接入网设备可以划分为中心节点和分布节点，其中，第一接入网节点可以用于实现中心节点的控制面，即第一接入网节点可以具有中心节点的控制面功能，第二接入网节点可以用于实现中心节点的用户面，即第二接入网节点可以具有中心节点的用户面功能，第三接入网节点可以用于实现分布节点，即第三接入网节点可以具有分布节点的功能。作为一个例子，该第一接入网节点可以具体为CU-C，第二接入网节点可以具体为CU-U，第三接入网节点可以具体为DU，但本申请实施例不限于此。
图3示出了本申请实施例提供的通信方法100。该通信方法100可以用于建立用户面，具体地，该方法100可以用于建立DRB的传输通道。该DRB的传输通道可以包括第一传输通道和第二传输通道，其中，该第一传输通道可以建立在第二接入网节点与核心网之间，第二传输通道可以建立在第二接入网节点与第三接入网节点之间。
在方法100中，该第一接入网节点可以分别获取第二传输通道在第二接入网节点处的端点信息和在第三接入网节点处的端点信息，并将该第二传输通道在第二接入网节点处的端点信息通知该第三接入网节点，以及将该第二传输通道在第三接入网节点处的端点信息通知该第二接入网节点。
在一个可选实施例中，可以由第一接入网节点发起DRB的传输通道的建立。
S110，第一接入网节点向第三接入网节点发送第一请求。
该第一接入网节点可以向第三接入网节点发送第一请求，该第一请求可以用于请求在第三接入网节点处建立用户面，即该第一请求可以具体为第一用户面建立请求，其中，该第一请求可以用于请求建立一个或多个用户面，本申请实施例对此不做限定。具体地，该第一请求可以用于请求在第三接入网节点与第二接入网节点之间建立DRB的传输通道，即第二传输通道。可选地，该第二传输通道可以具体为GPRS隧道协议用户面(GPRS tunneling protocol-user plane，GTP-U)隧道或信令控制传输协议(signaling control transmission protocol，SCTP)隧道或其他隧道，但本申请实施例不限于此。
可选地，该第一请求可以包含DRB的配置信息，其中，可选地，该DRB的配置信息可以包括DRB的标识信息和/或DRB对应的QoS信息，但本申请实施例不限于此。可选地，该第一请求可以包含第三接入网节点的至少一个协议层的配置信息，其中，该至少一 个协议层可以用于该DRB的数据传输和/或处理该DRB上传输的数据。例如，该至少一个协议层可以包括PHY层，或者包括PHY层和MAC层，或者包括PHY层、MAC层和RLC层，或者包括PHY层、MAC层、RLC层和PDCP层，等等，本申请实施例不限于此。可选地，PHY层配置信息可以包括下列信息中的至少一项：物理下行共享信道(physical downlink shared channel，PDSCH)的配置信息、物理上行控制信道(physical uplink control channel，PUCCH)的配置信息、物理上行共享信道(physical uplink shared channel，PUSCH)的配置信息、上行链路功率控制的配置信息、信道质量指示符(channel quality identifier，CQI)的上报配置信息、天线的配置信息(例如天线的传输模式等等)、半静态调度的配置信息。可选地，MAC层的配置信息可以包括下列信息中的至少一项：缓存状态报告(buffer status report，BSR)计时器的信息、非连续接收(dis-continuous reception，DRX)的配置信息、时间对齐计时器(time alignment timer，TA Timer)的信息、调度请求的配置信息。可选地，RLC层的配置信息可以包括RLC层的模式信息。可选地，PDCP层的配置信息可以包括该用户面的密钥信息。可选地，PHY层的配置信息、MAC层的配置信息、RLC层的配置信息和PDCP层的配置信息中的一项或多项也可以包括其他信息，本申请实施例不限于此。
S120，第三接入网节点在接收到第一接入网节点发送的第一请求之后，可以向第一接入网节点发送第一响应。
可选地，第三接入网节点在接收到第一请求之后，可以配置DRB。例如，该第三接入网节点可以配置用于该DRB的至少一个协议层。在配置完成之后，第三接入网节点可以向第一用户面发送第一响应，指示该第三接入网节点完成对该DRB的配置。可选地，第三接入网节点可以确定该第二传输通道在第三接入网节点侧的端点信息，相应地，该第一响应可以包含第二传输通道在第三接入网节点侧的端点信息，其中，可选地，该端点信息可以包括GTP-U端点标识(tunneling endpoint identity,TEID)和/或传输层地址，其中，该传输层地址可以具体为IP地址，例如IPV4或IPV6地址，但本申请实施例不限于此。该GTP-U TEID可以用于第二接入网节点进行下行(downlink，DL)数据的传输，相应地，该GTP-U TEID也可以称为DL GTP-U TEID，但本申请实施例不限于此。
S130，第一接入网节点向第二接入网节点发送第二请求。
第一接入网节点可以向第二接入网节点发送第二请求，用于请求在第二接入网节点处建立用户面。具体地，该第二请求可以用于请求建立第二传输通道。
可选地，该第二请求可以包含该DRB的标识信息。
可选地，该第二请求可以包含第一传输通道在核心网侧的端点信息，其中，该第一传输通道为核心网与该第二接入网节点之间的传输通道，该传输通道可以用于传输该DRB上承载的数据。例如，该第一传输通道可以具体为核心网与第二接入网节点之间为演进无线接入承载(evolved radio access bearer，E-RAB)建立的传输通道，其中，该E-RAB与该DRB具有一一映射关系。再例如，该第一传输通道可以具体为核心网与第二接入网节点之间为PDU会话建立的传输通道，其中，该PDU会话由至少一个流组成，到达无线接入网(radio access network，RAN)之后，由RAN将所述至少一个流映射成DRB，但本申请实施例不限于此。可选地，该第一传输通道在核心网侧的端点信息可以具体包括GTP-U TEID和/或传输层地址，其中，该GTP-U TEID可以用于第二接入网节点进行上行 数据的传输，相应地，该GTP-U TEID也可以称为UL GTP-U TEID，但本申请实施例不限于此。
可选地，该第二请求可以包含该第二接入网节点的至少一个协议层中每个协议层的配置信息，其中，该至少一个协议层可以用于该DRB的数据传输和/或处理该DRB上传输的数据。可选地，该至少一个协议层可以包括PDCP层，或PDCP层和其他层，例如PDCP层和SDAP层，该第二请求可以携带用于处理该DRB上承载的数据的一个或多个协议层中的部分或全部协议层的配置信息，但本申请实施例不限于此。
S140，第二接入网节点在接收到第一接入网节点发送的第二请求之后，根据该第二请求，向第一接入网节点发送第二响应。
第二接入网节点在接收到第二请求之后，可以配置该第二接入网节点处的用户面。例如，该第二接入网节点可以配置该第二接入网节点的至少一个协议层。在配置完成之后，第二接入网节点可以向第一接入网节点发送第二响应，指示该第二接入网节点完成对该DRB的配置。该第二接入网节点还可以确定第一传输通道和/或第二传输通道在该第二接入网节点处的端点信息，可选地，该第二响应可以包含下列信息中的至少一种：该第一传输通道在该第二接入网节点侧的端点信息、该第二传输通道在该第二接入网节点侧的端点信息，其中，可选地，这里的端点信息可以包括GTP-U TEID和/或传输层地址，但本申请实施例不限于此。
在本申请实施例中，可选地，该第一接入网节点可以确定该DRB与流(即数据流)之间的映射关系，并在该第二请求中包含用于指示该DRB与流之间的映射关系的第一指示信息。
该DRB可以与至少一个流之间存在映射关系，即可以有一个或多个流映射到该DRB。
可选地，该第一指示信息可以包括映射到该DRB的至少一个流的标识和/或QoS信息。
可选地，该第一接入网节点可以获取流的信息，例如流的QoS信息，并根据该流的信息，确定该流映射到该DRB，即确定该流与该DRB具有映射关系。作为一个可选例子，该第一接入网节点可以从核心网获取流的信息，例如，该第一接入网节点可以从核心网接收控制信令，该控制信令包含该流的信息，但本申请实施例不限于此。
作为另一个可选例子，该第一接入网节点也可以从第二接入网节点获取流的信息。例如，第二接入网节点可以从核心网接收数据包，其中，该数据包可以包含该数据包所属流的信息，例如，该数据包的包头中可以包含该数据包对应的流信息，但本申请实施例不限于此。此时，该第二接入网节点可以从该数据包获取流信息，并向该第一接入网节点发送该数据包所属流的信息，但本申请实施例不限于此。
此时，可选地，该第一接入网节点在获取到流的信息之后，可以进行准入控制(admission control)，以确定是否接受该流。例如，该第一接入网节点可以根据当前网络状态，例如无线接入网络的负荷状态，确定是否接受该流；或者，该第一接入网节点可以根据是否能够满足该流的QoS要求，来确定是否接受该流，等等。本申请实施例对该第一接入网节点进行准入控制的具体实现不做限定。
可选地，如果该第一接入网节点确定接受该流，则可以执行上述流程，即建立DRB的传输通道。可选地，如果该第一接入网节点确定不接受该流，则可以向核心网发送用于指示拒绝接受该流的指示信息和/或该流的信息，例如该流的标识，本申请实施例对此不 限于此。
作为另一个可选实施例，可以由该第二接入网节点确定该DRB与流之间的映射关系，并向该第一接入网节点发送指示该DRB与流之间的映射关系的第一指示信息，但本申请实施例不限于此。
在本申请实施例中，该第二接入网节点可以通过多种方式确定该DRB与流之间的映射关系，即确定与该DRB具有映射关系的至少一个流。可选地，该第一接入网节点可以将流信息告知第二接入网节点，其中，该流信息可以包括流标识和/或流的QoS信息，或者也可以包括其他信息，本申请实施例不限于此。该第二接入网节点可以根据该第一接入网节点发送的流信息，确定该DRB与流之间的映射关系，即确定该流映射到该DRB。可选地，该第二接入网节点也可以根据从核心网接收到的数据包，确定该DRB与流之间的映射关系，例如，该数据包的包头中包含该数据包对应的流信息，该第二接入网节点可以从该数据包中获取流信息，确定该流映射到该DRB，但本申请实施例不限于此。
可选地，该第二接入网节点可以向第一接入网节点发送包含该第一指示信息的第三请求。可选地，该第三请求还可以包含该流的信息和/或该第二传输通道在第二接入网节点处的端点信息，或者也可以进一步包含其他信息，本申请实施例对此不做限定。
可选地，该第一接入网节点在接收到该第三请求之后，可以向第三接入网节点发送包含该第二传输通道在第二接入网节点处的端点信息的第一请求，并在接收到包含该第二传输通道在该第三接入网节点处的端点信息之后，向该第二接入网节点发送第三响应，该第三响应包含该第二传输通道在该第三接入网节点处的端点信息，但本申请实施例不限于此。
作为一个可选实施例，在该第二接入网节点向该第一接入网节点发送第三请求之前，该第二接入网节点还可以对该流执行准入控制，并且在确定接受该流之后，向该第一接入网节点发送该第三请求，但本申请实施例不限于此。
作为另一个可选实施例，该第一接入网节点接收到该第三请求以后，可以根据该第三请求包含的该流的信息，对该流进行准入控制，并且在确定接受该流之后，向该第三接入网节点发送该第二传输通道在第二接入网节点处的端点信息，但本申请实施例对此不做限定。
可选地，如果该第一接入网节点或第二接入网节点在确定不接受该流，即拒绝该流，则可以向核心网发送指示不接受该流的第三指示信息。具体地，可以显性或隐性地进行指示。作为一个例子，该第一接入网节点或第二接入网节点可以向核心网反馈该流的信息，例如该流的标识，但本申请实施例不限于此。
可选地，该第一接入网节点还可以通过第三接入网节点向终端设备发送用于指示该DRB与流之间的映射关系的第二指示信息，例如，该第一接入网节点可以通过第三接入网节点向终端设备发送RRC信令，该RRC信令包含用于指示该DRB与流之间的映射关系的第二指示信息，但本申请实施例不限于此。其中，可选地，该第三接入网节点在接收到该第一接入网节点发送的该第二指示信息之后，可以透传该第二指示信息，或者在对该第二指示信息进行处理之后向终端设备发送该第二指示信息，本申请实施例对此不做限定。
作为一个例子，该第一接入网节点可以在初始配置DRB时，向该终端设备发送该DRB 与流之间的映射关系，而当该终端设备的另一个流被映射到该已建立的DRB时，该终端设备可以通过学习的方式确定该流与DRB之间的映射关系，相应地，该第一接入网节点可以不向该终端设备发送该流与DRB之间的映射关系。或者，可以由核心网通知该终端设备该DRB与流之间的映射关系。例如，该第一接入网节点未获知该DRB与流之间的映射关系和/或该流的信息，则核心网可以通过非接入层(non-access stratum，NAS)消息将流的QoS信息发给终端设备，并将流标识通过下一代用户面(next generation-user plane，NG-U)接口发给第二接入网节点，但本申请实施例不限于此。
在本申请实施例中，S130和S110可以同时进行，或者可以以任意先后顺序执行，本申请实施例对此不做限定。
作为一个可选实施例，S130可以在S110和S120之后执行，即第一接入网节点可以在接收到第三接入网节点发送的第一响应之后，向第二接入网节点发送第二请求。此时，可选地，该第二请求可以包含该第二传输通道在第三接入网节点侧的端点信息。这样，该第二接入网节点可以从该第二请求中获取该第二传输通道在第三接入网节点侧的端点信息，并在第二响应中包含该第二传输通道在第二接入网节点侧的端点信息。可选地，该第一接入网节点在接收到该第二响应之后，可以向第三接入网节点发送指示信息，以指示该第二响应中包含的该第二传输通道在第二接入网节点侧的端点信息，但本申请实施例不限于此。
作为另一个可选实施例，S110可以在S130和S140之后执行，即第一接入网节点可以在接收到第二接入网节点发送的第二响应之后，向第三接入网节点发送第一请求。此时，可选地，该第一请求可以包含该第二传输通道在第二接入网节点侧的端点信息。这样，该第三接入网节点可以从该第一请求中获取该第二传输通道在第二接入网节点侧的端点信息，并在第一响应中包含该第二传输通道在第三接入网节点侧的端点信息。可选地，该第一接入网节点在接收到该第一响应之后，可以向第二接入网节点发送指示信息，以指示该第一响应中包含的该第二传输通道在第三接入网节点侧的端点信息，但本申请实施例不限于此。
在本申请实施例中，可选地，该第二传输通道在第三接入网节点侧的端点信息可以由第一接入网节点配置，也可以由该第三接入网节点自己确定。可选地，如果该第一接入网节点发现该第二传输通道在第三接入网节点侧的端点信息改变，则该第一接入网节点可以通过修改流程将该第二传输通道在第三接入网节点侧的修改后的端点信息通知该第二接入网节点，例如，该第一接入网节点可以向该第二接入网节点发送用于指示该第二传输通道在第三接入网节点侧的修改后的端点信息的指示信息，但本申请实施例不限于此。
在另一个可选实施例中，可以由第二接入网节点发起DRB的传输通道的建立。
具体地，第二接入网节点可以向第一接入网节点发送第三请求，该第三请求包含指示该DRB与流的映射关系的第一指示信息。
可选地，该第三请求还可以包含第二传输通道和/或第一传输通道在第二接入网节点侧的端点信息。
该第一接入网节点可以根据该第三请求，向该第二接入网节点发送第三响应。
可选地，该第三响应可以包含该第二传输通道和/或第一传输通道在该第三接入网节点侧的端点信息。
可选地，该第一接入网节点可以在接收到第三请求之后，向第三接入网节点发送第一请求，并且在接收到该第一响应之后，向该第二接入网节点发送第三响应，但本申请实施例不限于此。
可选地，该第三响应可以包含该第二接入网节点的至少一个协议层的配置信息。
因此，本申请实施例提供的通信方法，能够在多个接入网节点之间建立DRB的传输通道，提高系统的可行性。
具体地，在接入网设备分离成CU-C、CU-U和DU的情况下，可以建立包括CU-U与核心网之间的第一传输通道以及CU-U和DU之间的第二传输通道的DRB的传输通道。
下面将结合具体例子，详细描述本申请实施例提供的通信方法。在以下例子中，假设第一接入网节点为CU-C，第二接入网节点为CU-U，第三接入网节点为DU，但本申请实施例不限于此。
图4示出了本申请实施例提供的另一通信方法200。在该方法200中，核心网将flow信息通过控制面消息告知CU-C，并且由CU-C确定流与DRB之间的映射关系。
S210，CU-C向CU-U发送指示流与DRB之间的映射关系的第一指示信息、CU-U的至少一个协议层的配置信息以及DRB的传输通道在核心网侧的端点信息，例如核心网TEID。
可选地，CU-C可以向CU-U发送第二请求，请求建立DRB的传输通道。此时，该第二请求包含第一指示信息、CU-U的至少一个协议层的配置信息以及DRB的传输通道在核心网侧的端点信息。
作为一个例子，该CU-U的至少一个协议层的配置信息可以包括SDAP和PDCP的配置信息中的至少一种。
S220，CU-U在从CU-C接收上述信息之后，向CU-C发送该DRB的传输通道在CU-U侧的端点信息，例如CU-U TEID。
可选地，该CU-U侧的端点信息可以包括下列中的至少一种：CU-U面向核心网的端点信息，即第一传输通道在CU-U侧的端点信息，例如TEID，以下简称为UL TEID，以及CU-U面向DU的端点信息，即第二传输通道在CU-U侧的端点信息，例如TEID，以下简称为DL TEID。
可选地，CU-U在接收到上述信息之后，可以配置该DRB。
可选地，该CU-U可以向该CU-C发送第二响应，该第二响应包含该DRB的传输通道在CU-U侧的端点信息。
S230，CU-C向DU发送DU的至少一个协议层的配置信息以及CU-U侧的端点信息，例如CU-U TEID。
作为一个例子，该DU的至少一个协议层的配置信息可以包括RLC、MAC和PHY的配置信息中的至少一种。
可选地，该CU-C可以向DU发送第一请求，该第一请求包含DU的至少一个协议层的配置信息以及CU-U侧的端点信息。
可选地，该CU-U TEID可以具体为CU-U的DL TEID。
S240，DU在从CU-C接收上述信息之后，可以向CU-C发送DRB的传输通道在DU侧的端点信息，例如DU TEID。
可选地，DU在从CU-C接收到上述信息之后，可以配置该DRB。
可选地，该DU可以向CU-C发送第一响应，该第一响应包含该DRB的传输通道在DU侧的端点信息。
S250，CU-C在从DU接收DU侧的端点信息之后，可以向CU-U发送该DU侧的端点信息。
S260，CU-U在从CU-C接收DU侧的端点信息之后，可以向CU-C回复确认(ACK)。
这样，建立了DU到核心网之间的DRB的传输通道。
图5示出了本申请实施例提供的另一通信方法300。在该通信方法300中，核心网将流信息通过控制面消息告知CU-C，CU-C将该流信息告知CU-U，由CU-U确定流与DRB的映射关系，再将该映射关系告知CU-C。
S310，CU-C向CU-U发送流信息以及DRB的传输通道在核心网侧的端点信息，例如核心网TEID。
可选地，流信息可以包括流的标识信息和/或QoS信息。
可选地，该CU-C可以向CU-U发送第二请求，该第二请求包含流信息以及DRB的传输通道在核心网侧的端点信息。
S320，CU-U在从CU-U接收到上述信息之后，可以向CU-C发送指示流与DRB的映射关系的第一指示信息以及该DRB的传输通道在CU-U侧的端点信息，例如CU-U TEID。
CU-U在接收到流信息之后，可以根据流信息，确定将该流映射到该DRB。
可选地，CU-U侧的端点信息可以包括UL TEID和DL TEID中的至少一种。
可选地，该CU-U可以向CU-C发送第二响应，该第二响应包含第一指示信息以及该DRB的传输通道在CU-U侧的端点信息。
S330，CU-C向DU发送DU的至少一个协议层的配置信息以及该DRB的传输通道在CU-U侧的端点信息，例如CU-U TEID。
可选地，这里的CU-U TEID可以具体为CU-U DL TEID。
可选地，该CU-C可以向DU发送第一请求，该第一请求包含DU的至少一个协议层的配置信息以及该DRB的传输通道在CU-U侧的端点信息。
S340，DU在从CU-C获取到上述信息之后，可以向CU-C发送该DRB的传输通道在DU侧的端点信息，例如DU TEID。
可选地，DU在获取到至少一个协议层的配置信息之后，可以配置该DRB。
可选地，DU可以向CU-C发送第一响应，该第一响应包含该DRB的传输通道在DU侧的端点信息。
S350，CU-C在从DU获取DU侧的端点信息之后，可以向CU-U发送DU侧的端点信息以及CU-U的至少一个协议层的配置信息。
S360，CU-U在从CU-C接收DU侧的端点信息以及协议层配置之后，可以向CU-C发送确认消息，例如ACK。
图6示出了本申请实施例提供的另一通信方法400。在该方法中，核心网将数据包发送到CU-U，CU-U通过解析数据包获得流信息，并将流信息告知CU-C，由CU-C确定流与DRB的映射关系，并将该映射关系告知CU-U。
S410，CU-U向CU-C发送流信息。
S420，CU-C从CU-U接收流信息之后，可以向CU-C发送指示流与DRB的映射关系的第一指示信息以及CU-U的至少一个协议层的配置信息。
可选地，CU-C可以根据流信息，确定该流映射的DRB。
可选地，该CU-C可以向CU-U发送第二请求，该第二请求包含第一指示信息以及CU-U的至少一个协议层的配置信息。
S430，CU-U从CU-C接收第一指示信息以及协议层配置之后，向CU-C发送DRB的传输通道在CU-U侧的端点信息，例如CU-U TEID。
可选地，CU-U可以根据协议层配置，配置该DRB。
可选地，该CU-U可以根据该第一指示信息，确定该DRB的传输通道在CU-U侧的端点信息。
可选地，该CU-U可以向CU-C发送第二响应，该第二响应包含DRB的传输通道在CU-U侧的端点信息。
S440，CU-C在从CU-U接收CU-U侧的端点信息之后，可以向DU发送DU的至少一个协议层的配置信息以及CU-U侧的端点信息。
可选地，该CU-C可以向DU发送第一请求，该第一请求包含协议层配置以及CU-U TEID。
S450，DU在从CU-C接收协议层配置以及CU-U侧的端点信息之后，可以向CU-C发送DU侧的端点信息。
可选地，该DU可以向CU-C发送第一响应，该第一响应包含DU TEID。
S460，CU-C在从DU接收DU侧的端点信息之后，向CU-U发送该DU侧的端点信息。
S470，CU-U在从CU-C接收DU侧的端点信息之后，向CU-C发送确认消息。
图7示出了本申请实施例提供的另一通信方法500。在该方法中，核心网将数据包发送到CU-U，CU-U通过解析数据包获得流信息，并且由CU-U确定流与DRB的映射关系，并告知CU-C。
S510，CU-U向CU-C发送流信息、指示流与DRB之间的映射关系的第一指示信息以及DRB的传输通道在CU-U侧的端点信息。
可选地，CU-U可以向CU-C发送第三请求，该第三请求包含流信息、第一指示信息以及DRB的传输通道在CU-U侧的端点信息。
S520，CU-C在从CU-U接收上述信息之后，向DU发送DU的至少一个协议层的配置信息以及CU-U侧的端点信息。
可选地，CU-C可以向DU发送第一请求，该第一请求包含DU的协议层配置以及CU-U侧的端点信息。
S530，DU在从CU-C接收上述信息之后，可以向CU-C发送DU侧的端点信息。
可选地，DU可以向CU-C发送第一响应，该第一响应包含DU侧的端点信息。
S540，CU-C在从DU接收DU侧的端点信息之后，可以向CU-U发送DU侧的端点信息以及CU-U的至少一个协议层的配置信息。
应理解，图4至图7所示的例子是为了帮助本领域技术人员更好地理解本申请实施例，而非要限制本申请实施例的范围。本领域技术人员根据所给出的上述示例，显然可以进行 各种等价的修改或变化，这样的修改或变化也落入本申请实施例的范围内。
图8示出了本申请另一实施例提供的通信方法600。该方法可以用于建立控制面。
S610，第一接入网节点向第三接入网节点发送请求消息，该请求消息可以用于请求建立控制面。
可选地，该请求消息可以具体为控制面建立请求。可选地，该请求消息可以用于请求在第一接入网节点和第三接入网节点之间建立信令无线承载(signaling radio bearer，SRB)的传输通道。
可选地，该请求消息可以包含下列信息中的至少一种：SRB的信息、该第三传输通道在第一接入网节点侧的端点信息、该第三接入网节点的至少一个协议层的配置信息，其中，该第三传输通道可以是第一接入网节点与第三接入网节点之间的对应于该SRB的传输通道。可选地，该请求消息还可以包含其他信息，本申请实施例对此不做限定。
可选地，该请求消息可以包含一个或多个SRB的信息，例如，该请求消息可以包含SRB1的信息和SRB2的信息，但本申请实施例不限于此。该第三接入网节点可以包括用于该SRB的一个或多个协议层，例如包括PHY层，或者包括PHY层和MAC层，或者包括PHY层、MAC层和RLC层，或者包括PHY层、MAC层、RLC层和PDCP层，等等，本申请实施例不限于此。该请求消息可以包含该一个或多个协议层中的部分或所有协议层的配置信息。可选地，PHY层配置信息可以包括下列信息中的至少一项：PDSCH的配置信息、PUCCH的配置信息、PUSCH的配置信息、上行链路功率控制的配置信息、CQI的上报配置信息、天线的配置信息(例如天线的传输模式等等)、半静态调度的配置信息。可选地，MAC层的配置信息可以包括下列信息中的至少一项：BSR计时器的信息、DRX的配置信息、TA Timer的信息、调度请求的配置信息。可选地，RLC层的配置信息可以包括RLC层的模式信息。可选地，PDCP层的配置信息可以包括该用户面的密钥信息。可选地，PHY层的配置信息、MAC层的配置信息、RLC层的配置信息和PDCP层的配置信息中的一项或多项也可以包括其他信息，本申请实施例不限于此。
S620，第三接入网节点在接收到第一接入网节点发送的请求消息之后，可以根据该请求消息，配置该SRB，并向第一接入网节点发送响应消息。
第三接入网节点在接收到请求消息之后，可以配置第三接入网节点处的SRB。例如，该第三接入网节点可以确定该第三传输通道在第三接入网节点侧的端点信息，和/或配置用于该SRB的至少一个协议层。在配置完成之后，第三接入网节点可以向第一用户面发送响应消息，指示该第三接入网节点完成对该SRB的配置。可选地，该响应消息可以包含该第三传输通道在第三接入网节点侧的端点信息，例如GTP TEID和/或传输层地址，或者该响应消息还可以包括其他信息，本申请实施例对此不做限定。
因此，本申请实施例提供的通信方法，能够在第一接入网节点和第三接入网节点之间建立SRB的传输通道，从而提高系统的可行性。
具体地，在接入网设备分离成CU-C、CU-U和DU的情况下，可以在CU-C和DU之间建立SRB的传输通道。
图9示出了本申请另一实施例提供的通信方法700，该方法可以用于终端设备的切换。
S710，第一源接入网节点向第一目标接入网节点发送第一请求。该第一请求可以用于请求将终端设备切换到该第一目标接入网节点。可选地，该第一请求可以包含第二源接入 网节点与核心网之间的传输通道在核心网侧的端点信息，或者也可以包含其他信息，本申请实施例对此不做限定。
第一目标接入网节点接收到第一源接入网节点发送的第一请求之后，可以确定该终端设备对应的数据转发通道的端点信息。
可选地，该数据转发通道可以建立在第二源接入网节点与第二目标接入网节点之间，并且可以用于第二源接入网节点向第二目标接入网节点转发该终端设备的数据。可选地，该数据转发通道的端点信息可以包括用于转发上行数据的通道的端点信息和/或用于转发下行数据的通道的端点信息，本申请实施例对此不做限定。
作为一个可选实施方式，该第一目标接入网节点可以根据该第一请求中包含的信息，配置该数据转发通道，例如，该第一目标接入网节点可以分配该数据转发通道的端点，但本申请实施例不限于此。此时，可选地，该第一目标接入网节点还可以向第二目标接入网节点发送用于指示该数据转发通道的端点信息的指示信息，例如在向第二目标接入网节点发送的第二请求中包含该数据转发通道的端点信息，但本申请实施例不限于此。
S720，该第一目标接入网节点向第二目标接入网节点发送第二请求。此时，可选地，该第二请求可以包含该第一请求中包含的部分或全部信息，例如包含第二源接入网节点与核心网之间的传输通道在核心网侧的端点信息，但本申请实施例不限于此。
S730，该第二目标接入网节点在接收到该第二请求之后，可以配置该数据转发通道的端点信息，例如GTP TEID和/或传输层地址，并向第一目标接入网节点发送第二响应，该第二响应包含该数据转发通道的端点信息。
相应地，该第一目标接入网节点可以获取该第二响应中包含的该数据转发通道的端点信息。
可选地，该第一目标接入网节点还可以通过其他方式确定该数据转发通道的配置信息，本申请实施例对此不做限定。
S740，该第一目标接入网节点向第一源接入网节点发送第一响应，该第一响应包含该数据转发通道的端点信息。
S750，第一源接入网节点在接收到第一目标接入网节点发送的第一响应之后，可以向该第二源接入网节点发送该数据转发通道的端点信息。
第二源接入网节点在接收到第一源接入网节点发送的指示信息之后，可以根据该指示信息，通过该数据转发通道向该第二目标接入网节点转发该终端设备的上行和/或下行数据。
可选地，在该第二源接入网节点缓存的该终端设备的上行和/或下行数据转发完成之后，该第二源接入网节点可以释放该终端设备的配置，例如丢弃该第二源接入网节点可以终端设备的上下文信息，但本申请实施例不限于此。
可选地，该第一接入网节点还可以向第三源接入网节点发送用于指示该第三源接入网节点释放该终端设备的配置的指示信息，相应地，该第三源接入网节点可以释放该终端设备的配置，但本申请实施例不限于此。
作为一个例子，在本申请实施例中，第一源接入网节点可以具体为源CU-C，第二源接入网节点可以具体为源CU-U，第三源接入网节点可以具体为源DU，第一目标接入网节点可以具体为目标CU-C，第二目标接入网节点可以具体为目标CU-U，但本申请实施 例不限于此。
因此，本申请实施例提供的通信方法，能够在终端设备切换接入网节点时实现从源接入网节点到目标接入网节点的数据转发，从而提高系统的可行性。
应理解，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
还应理解，在本申请实施例中，传输通道在某一节点侧的端点信息可以具体包括GTP-U TEID和/或传输层地址，其中，该端点信息可以用于进行上行数据的传输，或者进行下行数据的传输，相应地，可以根据该端点信息的作用将GTP-U TEID表示为UL GTP-U TEID或DL GTP-U TEID，但本申请实施例不限于此。
上文中结合图1至图9，详细描述了根据本申请实施例的通信方法，下面将结合图10至图12，详细描述根据本申请实施例的通信装置。
图10示出了本申请实施例提供的通信装置800，其中，该装置800可以具体为CU-C，但本申请实施例不限于此。
如图10所示，该装置800包括：发送单元810和接收单元820。
在一个可选实施例中，发送单元810用于向第二接入网节点发送第二传输通道在第三接入网节点处的端点信息，并向第三接入网节点发送该第二传输通道在第二接入网节点处的端点信息。
接收单元820可以用于从第二接入网节点接收第二传输通道在第二接入网节点处的端点信息，并从第三接入网节点接收第二传输通道在第三接入网节点处的端点信息。
可选地，该发送单元810可以用于向第三接入网节点发送第一请求，相应地，该接收单元820可以用于从第三接入网节点接收响应于该发送单元810发送的该第一请求的第一响应。
可选地，该第一响应包含第二传输通道在第三接入网节点处的端点信息。
可选地，该发送单元820可以用于向第二接入网节点发送第二请求，该接收单元820用于从该第二接入网节点接收响应于该发送单元810发送的该第二请求的第二响应。
可选地，该第二响应包含第二传输通道在第二接入网节点处的端点信息。
可选地，该发送单元810具体用于在接收到该第一响应之后，向第二接入网节点发送第二请求，其中，该第二请求还包含第二传输通道在该第三接入网节点侧的端点信息；
相应地，该发送单元810还用于在该接收单元820接收到该第二响应之后，向该第三接入网节点发送该第二传输通道在该第二接入网节点侧的端点信息。
可选地，该发送单元810具体用于在接收到该第二响应之后，向第三接入网节点发送第一请求，其中，该第一请求还包含第二传输通道在该第二接入网节点侧的端点信息；
相应地，该发送单元810还用于在该接收单元820接收到该第二响应之后，向该第二接入网节点发送该第二传输通道在该第三接入网节点侧的端点信息。
可选地，该装置800还包括：处理单元，用于获取流的QoS信息，以及根据该流的QoS信息，确定该DRB与该流之间的映射关系，其中，该第二请求包含指示该映射关系的第一指示信息。
可选地，该第二请求包含该流的QoS信息，该第二响应包含指示该映射关系的第一指示信息。
可选地，该接收单元820用于从第二接入网节点接收第三请求，该发送单元810用于向第二接入网节点发送响应于第三请求的第三响应。
可选地，该第三请求包含指示DRB与流的映射关系的第一指示信息以及该第二传输通道在第二接入网节点处的端点信息。
在另一个可选实施例中，发送单元810用于向第三接入网节点发送请求消息，该请求消息包含下列信息中的至少一种：SRB的信息、传输通道在该第一接入网节点侧的端点信息、该第三接入网节点的至少一个协议层的配置信息，其中，该传输通道为该第一接入网节点与该第三接入网节点之间的对应于该SRB的传输通道；
相应地，接收单元820用于从该第三接入网节点接收响应于该发送单元810发送的该请求消息的响应消息，其中，该响应消息包含该传输通道在该第三接入网节点侧的端点信息。
应理解，通信装置800以功能单元的形式体现。在一个可选例子中，本领域技术人员可以理解，这里的通信装置800可以具体为上述实施例中的第一接入网节点，通信装置800可以用于执行上述方法实施例中与第一接入网节点对应的各个流程和/或步骤，为避免重复，在此不再赘述。
图11示出了本申请实施例提供的另一通信装置900，包括：发送单元910和接收单元920。
在一个可选实施例中，该装置可以具体为CU-U，但本申请实施例不限于此。
具体地，发送单元910用于向第一接入网节点发送第二传输通道在该第二接入网节点侧的端点信息，其中，该第二传输通道为该第二接入网节点与该第三接入网节点之间的对应于数据无线承载DRB的传输通道；
接收单元920用于从该第一接入网节点接收该第二传输通道在第三接入网节点侧的端点信息。
可选地，该接收单元920还用于在该发送单元910向第一接入网节点发送第二传输通道在该第二接入网节点侧的端点信息之前，从该第一接入网节点接收第二请求；
该发送单元910具体用于根据该第二请求，向该第一接入网节点发送第二响应，其中，该第二响应包含该第二传输通道在该第二接入网节点侧的端点信息。
可选地，该第二请求包含第一传输通道在核心网侧的端点信息，该第二响应还包含该第一传输通道在该第二接入网节点侧的端点信息。
可选地，该第二请求包含该第二传输通道在第三接入网节点侧的端点信息。
该第二接入网节点从该第一接入网节点接收该第二传输通道在第三接入网节点侧的端点信息，包括：
可选地，该接收单元920具体用于在该发送单元910向该第一接入网节点发送第二响应之后，从该第一接入网节点接收该第二传输通道在第三接入网节点侧的端点信息。
可选地，该第二请求包含流的信息。此时，该装置900还可以包括处理单元930，用于在该发送单元910向该第一接入网节点发送第二响应之前，根据该第二请求中包含的流的信息，确定该流映射到该DRB。相应地，该第二响应还包含指示该流与该DRB之间的映射关系的指示信息。
可选地，该第二请求包含指示该流与该DRB之间的映射关系的指示信息。
可选地，该接收单元920还用于从核心网接收数据包；
处理单元930用于从该数据包获取该数据包所属流的信息；
发送单元910还用于向该第一接入网节点发送该流的信息。
可选地，该接收单元920还用于从核心网接收数据包；
处理单元930还用于从该数据包获取该数据包所属流的信息，该流的信息包括该流的QoS信息，以及根据该流的信息，确定该流映射到该DRB；
该发送单元910用于向该第一接入网节点发送第三请求，该第三请求包含指示该流与该DRB之间的映射关系的指示信息以及该第二传输通道在该第二接入网节点侧的端点信息；
该接收单元920具体用于从该第一接入网节点接收响应于该第三请求的第三响应，该第三响应包含该第二传输通道在第三接入网节点侧的端点信息。
可选地，该接收单元920还用于从该第一接入网节点接收该第二接入网节点的至少一个协议层的配置信息；
处理单元930用于根据该第二接入网节点的至少一个协议层的配置信息，配置该DRB。
在一个可选例子中，本领域技术人员可以理解，这里的通信装置900可以具体为上述实施例中的第二接入网节点，通信装置900可以用于执行上述方法实施例中与第二接入网节点对应的各个流程和/或步骤，为避免重复，在此不再赘述。
在另一个可选实施例中，该装置可以具体为DU，但本申请实施例不限于此。
具体地，接收单元920用于从第一接入网节点接收第二传输通道在第二接入网节点侧的端点信息；
发送单元910用于向该第一接入网节点发送该第二传输通道在该第三接入网节点侧的端点信息。
可选地，该接收单元920还用于在该发送单元910向该第一接入网节点发送该第二传输通道在该第三接入网节点侧的端点信息之前，从该第一接入网节点接收第一请求；
相应地，该发送单元910用于根据该第一请求，向该第一接入网节点发送第一响应，该第一响应包含该第二传输通道在该第三接入网节点侧的端点信息。
可选地，该第一请求包含该第二传输通道在第二接入网节点侧的端点信息。
可选地，该第一请求包含该第三接入网节点的至少一个协议层的配置信息。
处理单元930可以用于根据该至少一个协议层的配置信息，配置DRB。
可选地，该接收单元920可以具体用于在发送单元910向该第一接入网节点发送第一响应之后，从该第一接入网节点接收该第二传输通道在该第二接入网节点侧的端点信息。
在另一个可选实施例中，接收单元920用于从第一接入网节点接收请求消息，该请求消息包含下列信息中的至少一种：SRB的信息、传输通道在该第一接入网节点侧的端点信息、该第三接入网节点的控制面的至少一个协议层的配置信息，其中，该传输通道是该第一接入网节点与该第三接入网节点之间的对应于该SRB的传输通道；
发送单元910用于向该第一接入网节点发送响应消息，其中，该响应消息包含该传输通道在该第三接入网节点侧的端点信息。
可选地，处理单元930用于根据该请求消息中包含的至少一个协议层的配置信息，配 置该SRB。
在一个可选例子中，本领域技术人员可以理解，这里的通信装置900可以具体为上述实施例中的第三接入网节点，通信装置900可以用于执行上述方法实施例中与第三接入网节点对应的各个流程和/或步骤，为避免重复，在此不再赘述。
应理解，上文所述的装置700、装置800和装置900中的任意组合可以是独立的设备，也可以集成在同一个设备中，本申请实施例对此不做限定。
图12示出了本申请实施例提供的另一通信装置1100，该装置1100包括发送单元1110和接收单元1120。
在一个可选实施例中，发送单元1110用于向第一目标接入网节点发送第一请求，该第一请求包含核心网与第二源接入网节点之间的传输通道在核心网侧的端点信息；
接收单元1120用于从该第一目标接入网节点接收响应于该第一请求的第一响应，该第一响应包含该终端设备对应的数据转发通道在第二目标接入网节点侧的端点信息；
该发送单元1110还用于向该第二源接入网节点发送第一指示信息，该第一指示信息包含该数据转发通道在该第二目标接入网节点侧的端点信息，以及向第三源接入网节点发送第二指示信息，该第二指示信息用于指示该第三源接入网节点释放该终端设备的配置。
在一个可选例子中，本领域技术人员可以理解，这里的通信装置1100可以具体为上述实施例中的第一源接入网节点，通信装置1100可以用于执行上述方法实施例中与第一源接入网节点对应的各个流程和/或步骤，为避免重复，在此不再赘述。
在另一个可选实施例中，接收单元1120用于从第一源接入网节点接收第一请求，该第一请求包含核心网与第二源接入网节点之间的传输通道在核心网侧的端点信息；
发送单元1110用于根据该接收单元1120接收到的该第一请求，向该第二目标接入网节点发送第二请求；
该接收单元1120还用于从该第二目标接入网节点接收响应于该发送单元1110发送的该第二请求的第二响应，该第二响应包含该数据转发通道在该第二目标接入网侧的端点信息；
该发送单元1110还用于向该第一源接入网节点发送第一响应，该第一响应包含该数据转发通道在该第二目标接入网侧的端点信息。
在一个可选例子中，本领域技术人员可以理解，这里的通信装置1100可以具体为上述实施例中的第一目标接入网节点，通信装置1100可以用于执行上述方法实施例中与第一目标接入网节点对应的各个流程和/或步骤，为避免重复，在此不再赘述。
还应理解，在本申请实施例中，术语“单元”可以指应用特有集成电路(application specific integrated circuit，ASIC)、电子电路、用于执行一个或多个软件或固件程序的处理器(例如共享处理器、专有处理器或组处理器等)和存储器、合并逻辑电路和/或其它支持所描述的功能的合适组件。
图13示出了本申请实施例提供的通信装置1200，包括：收发器1210和处理器1220和存储器1230，其中，该收发器1210用于收发数据和/或信令，该存储器1230用于存储指令，该处理器1220用于执行该存储器1230存储的指令。
可选地，该装置1200可以具体为CU-C，但本申请实施例不限于此。
在一个可选实施例中，收发器1210用于：
向第三接入网节点发送第一请求，以及向第二接入网节点发送第二请求，其中，该第一请求包含DRB的配置信息，该第二请求包含第一传输通道在核心网侧的端点信息，该第一传输通道为该核心网与该第二接入网节点之间的传输通道；
从该第三接入网节点接收响应于该第一请求的第一响应，以及从该第二接入网节点接收响应于该第二请求的第二响应。
可选地，该收发器1210具体用于在接收到该第一响应之后，向第二接入网节点发送第二请求，其中，该第二请求还包含第二传输通道在该第三接入网节点侧的端点信息；
相应地，该收发器1210还用于在接收到该第二响应之后，向该第三接入网节点发送该第二传输通道在该第二接入网节点侧的端点信息。
可选地，该收发器1210具体用于在接收到该第二响应之后，向第三接入网节点发送第一请求，其中，该第一请求还包含第二传输通道在该第二接入网节点侧的端点信息；
相应地，该收发器1210还用于在接收到该第二响应之后，向该第二接入网节点发送该第二传输通道在该第三接入网节点侧的端点信息。
可选地，对该存储器1230中存储的指令的执行使得该处理器在该收发器1210向第二接入网节点发送第二请求之前，获取该流的QoS信息，以及根据该流的QoS信息，确定该DRB与该流之间的映射关系。
在一个可选例子中，收发器1210用于向第二接入网节点发送第二传输通道在第三接入网节点处的端点信息，并向第三接入网节点发送该第二传输通道在第二接入网节点处的端点信息。
收发器1210还可以用于从第二接入网节点接收第二传输通道在第二接入网节点处的端点信息，并从第三接入网节点接收第二传输通道在第三接入网节点处的端点信息。
可选地，该收发器1210可以用于向第三接入网节点发送第一请求，相应地，该收发器1210可以用于从第三接入网节点接收响应于该收发器1210发送的该第一请求的第一响应。
可选地，该第一响应包含第二传输通道在第三接入网节点处的端点信息。
可选地，该收发器1220可以用于向第二接入网节点发送第二请求，该收发器1210用于从该第二接入网节点接收响应于该第二请求的第二响应。
可选地，该第二响应包含第二传输通道在第二接入网节点处的端点信息。
可选地，该收发器1210具体用于在接收到该第一响应之后，向第二接入网节点发送第二请求，其中，该第二请求还包含第二传输通道在该第三接入网节点侧的端点信息；
相应地，该收发器1210还用于在该收发器1210接收到该第二响应之后，向该第三接入网节点发送该第二传输通道在该第二接入网节点侧的端点信息。
可选地，该收发器1210具体用于在接收到该第二响应之后，向第三接入网节点发送第一请求，其中，该第一请求还包含第二传输通道在该第二接入网节点侧的端点信息；
相应地，该收发器1210还用于在接收到该第二响应之后，向该第二接入网节点发送该第二传输通道在该第三接入网节点侧的端点信息。
可选地，处理器1220用于获取流的QoS信息，以及根据该流的QoS信息，确定该DRB与该流之间的映射关系，其中，该第二请求包含指示该映射关系的第一指示信息。
可选地，该第二请求包含该流的QoS信息，该第二响应包含指示该映射关系的第一 指示信息。
可选地，该收发器1210用于从第二接入网节点接收第三请求，并向第二接入网节点发送响应于第三请求的第三响应。
可选地，该第三请求包含指示DRB与流的映射关系的第一指示信息以及该第二传输通道在第二接入网节点处的端点信息。
在另一个可选例子中，收发器1210用于向第三接入网节点发送请求消息，该请求消息包含下列信息中的至少一种：SRB的信息、传输通道在该第一接入网节点侧的端点信息、该第三接入网节点的至少一个协议层的配置信息，其中，该传输通道为该第一接入网节点与该第三接入网节点之间的对应于该SRB的传输通道；
相应地，收发器1210用于从该第三接入网节点接收响应于该请求消息的响应消息，其中，该响应消息包含该传输通道在该第三接入网节点侧的端点信息。
在一个可选例子中，本领域技术人员可以理解，这里的通信装置1200可以具体为上述实施例中的第一接入网节点，通信装置1200可以用于执行上述方法实施例中与第一接入网节点对应的各个流程和/或步骤，为避免重复，在此不再赘述。
在另一个可选实施例中，该装置可以具体为CU-U，但本申请实施例不限于此。
具体地，收发器1210用于向第一接入网节点发送第二传输通道在该第二接入网节点侧的端点信息，其中，该第二传输通道为该第二接入网节点与该第三接入网节点之间的对应于数据无线承载DRB的传输通道，以及从该第一接入网节点接收该第二传输通道在第三接入网节点侧的端点信息。
可选地，该收发器1210还用于在该向第一接入网节点发送第二传输通道在该第二接入网节点侧的端点信息之前，从该第一接入网节点接收第二请求；
该收发器1210具体用于根据该第二请求，向该第一接入网节点发送第二响应，其中，该第二响应包含该第二传输通道在该第二接入网节点侧的端点信息。
可选地，该第二请求包含第一传输通道在核心网侧的端点信息，该第二响应还包含该第一传输通道在该第二接入网节点侧的端点信息。
可选地，该第二请求包含该第二传输通道在第三接入网节点侧的端点信息。
该第二接入网节点从该第一接入网节点接收该第二传输通道在第三接入网节点侧的端点信息，包括：
可选地，该收发器1210具体用于在向该第一接入网节点发送第二响应之后，从该第一接入网节点接收该第二传输通道在第三接入网节点侧的端点信息。
可选地，该第二请求包含流的信息。此时，处理器1220用于在该收发器1210向该第一接入网节点发送第二响应之前，根据该第二请求中包含的流的信息，确定该流映射到该DRB。相应地，该第二响应还包含指示该流与该DRB之间的映射关系的指示信息。
可选地，该第二请求包含指示该流与该DRB之间的映射关系的指示信息。
可选地，该收发器1210还用于从核心网接收数据包；
处理器1220用于从该数据包获取该数据包所属流的信息；
收发器1210还用于向该第一接入网节点发送该流的信息。
可选地，该收发器1210还用于从核心网接收数据包；
处理器1220还用于从该数据包获取该数据包所属流的信息，该流的信息包括该流的 QoS信息，以及根据该流的信息，确定该流映射到该DRB；
该收发器1210用于向该第一接入网节点发送第三请求，该第三请求包含指示该流与该DRB之间的映射关系的指示信息以及该第二传输通道在该第二接入网节点侧的端点信息；
该收发器1210具体用于从该第一接入网节点接收响应于该第三请求的第三响应，该第三响应包含该第二传输通道在第三接入网节点侧的端点信息。
可选地，该收发器1210还用于从该第一接入网节点接收该第二接入网节点的至少一个协议层的配置信息；
处理器1220用于根据该第二接入网节点的至少一个协议层的配置信息，配置该DRB。
在一个可选例子中，本领域技术人员可以理解，这里的通信装置1200可以具体为上述实施例中的第二接入网节点，通信装置1200可以用于执行上述方法实施例中与第二接入网节点对应的各个流程和/或步骤，为避免重复，在此不再赘述。
在另一个可选实施例中，该装置可以具体为DU，但本申请实施例不限于此。
具体地，在一个可选例子中，收发器1210用于从第一接入网节点接收第二传输通道在第二接入网节点侧的端点信息，并向该第一接入网节点发送该第二传输通道在该第三接入网节点侧的端点信息。
可选地，该收发器1210还用于在向该第一接入网节点发送该第二传输通道在该第三接入网节点侧的端点信息之前，从该第一接入网节点接收第一请求；
相应地，该收发器1210用于根据该第一请求，向该第一接入网节点发送第一响应，该第一响应包含该第二传输通道在该第三接入网节点侧的端点信息。
可选地，该第一请求包含该第二传输通道在第二接入网节点侧的端点信息。
可选地，该第一请求包含该第三接入网节点的至少一个协议层的配置信息。
处理器1220可以用于根据该至少一个协议层的配置信息，配置DRB。
可选地，该收发器1210可以具体用于在收发器1210向该第一接入网节点发送第一响应之后，从该第一接入网节点接收该第二传输通道在该第二接入网节点侧的端点信息。
在另一个可选例子中，收发器1210用于从第一接入网节点接收请求消息，该请求消息包含下列信息中的至少一种：SRB的信息、传输通道在该第一接入网节点侧的端点信息、该第三接入网节点的控制面的至少一个协议层的配置信息，其中，该传输通道是该第一接入网节点与该第三接入网节点之间的对应于该SRB的传输通道；
收发器1210用于向该第一接入网节点发送响应消息，其中，该响应消息包含该传输通道在该第三接入网节点侧的端点信息。
可选地，处理器1220用于根据该请求消息中包含的至少一个协议层的配置信息，配置该SRB。
在一个可选例子中，本领域技术人员可以理解，这里的通信装置1200可以具体为上述实施例中的第三接入网节点，通信装置1200可以用于执行上述方法实施例中与第三接入网节点对应的各个流程和/或步骤，为避免重复，在此不再赘述。
在一个可选实施例中，收发器1210用于：
向第一目标接入网节点发送第一请求，该第一请求包含核心网与第二源接入网节点之间的传输通道在核心网侧的端点信息；
从该第一目标接入网节点接收响应于该第一请求的第一响应，该第一响应包含该终端设备对应的数据转发通道在第二目标接入网节点侧的端点信息；
向该第二源接入网节点发送第一指示信息，该第一指示信息包含该数据转发通道在该第二目标接入网节点侧的端点信息，以及向第三源接入网节点发送第二指示信息，该第二指示信息用于指示该第三源接入网节点释放该终端设备的配置。
在一个可选例子中，本领域技术人员可以理解，这里的通信装置1200可以具体为上述实施例中的第一源接入网节点，通信装置1200可以用于执行上述方法实施例中与第一源接入网节点对应的各个流程和/或步骤，为避免重复，在此不再赘述。
在另一个可选实施例中，收发器1210用于：
从第一源接入网节点接收第一请求，该第一请求包含核心网与第二源接入网节点之间的传输通道在核心网侧的端点信息；
根据接收到的该第一请求，向该第二目标接入网节点发送第二请求；
从该第二目标接入网节点接收响应于该第二请求的第二响应，该第二响应包含该数据转发通道在该第二目标接入网侧的端点信息；
向该第一源接入网节点发送第一响应，该第一响应包含该数据转发通道在该第二目标接入网侧的端点信息。
在一个可选例子中，本领域技术人员可以理解，这里的通信装置1200可以具体为上述实施例中的第一目标接入网节点，通信装置1200可以用于执行上述方法实施例中与第一目标接入网节点对应的各个流程和/或步骤，为避免重复，在此不再赘述。
应理解，在本申请实施例中，该处理器可以是中央处理单元(central processing unit，CPU)，该处理器还可以是其他通用处理器、数字上行信号处理器(DSP)、专用集成电路(ASIC)、现成可编程门阵列(FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
存储器可以包括只读存储器和随机存取存储器，并向处理器提供指令和数据。存储器的一部分还可以包括非易失性随机存取存储器。例如，存储器还可以存储设备类型的信息。该处理器可以用于执行存储器中存储的指令，并且该处理器执行该指令时，该处理器可以执行上述方法实施例中与终端设备对应的各个步骤。
本申请实施例还提供了一种无线接入网络，该无线接入网络可以包括第一接入网节点、第二接入网节点和第三接入网节点，其具体实现可以如上文所述，为了简洁，这里不再赘述。
作为一个例子，该无线接入网络可以包括CU-C、CU-U和DU，其具体架构可选地可以如图2所示，但本申请实施例不限于此。
本申请实施例还提供了一种处理装置，包括处理器和接口；
该处理器，用于执行上述本申请各种实施例中的方法。
该处理装置可以是一个芯片，该处理器可以通过硬件来实现也可以通过软件来实现，当通过硬件实现时，该处理器可以是逻辑电路、集成电路等；当通过软件来实现时，该处理器可以是一个通用处理器，通过读取存储器中存储的软件代码来实现，该存储器可以集成在处理器中，可以位于所述处理器之外，独立存在。
例如，该处理装置可以是现场可编程门阵列(field-programmable gate array，FPGA)，可以是专用集成芯片(application specific integrated circuit，ASIC)，还可以是系统芯片(system on chip，SoC)，还可以是中央处理器(central processor unit，CPU)，还可以是网络处理器(network processor，NP)，还可以是数字信号处理电路(digital signal processor，DSP)，还可以是微控制器(micro controller unit，MCU)，还可以是可编程控制器(programmable logic device，PLD)或其他集成芯片。
在实现过程中，上述方法的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器执行存储器中的指令，结合其硬件完成上述方法的步骤。为避免重复，这里不再详细描述。
应理解，上文对本申请实施例的描述着重于强调各个实施例之间的不同之处，未提到的相同或相似之处可以互相参考，为了简洁，这里不再赘述。
此外，本文中术语“系统”和“网络”在本文中常被可互换使用。本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部 分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘solid state disk(SSD))等。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (33)

  1. 一种通信方法，其特征在于，包括：
    第一接入网节点从第二接入网节点获取第二传输通道在所述第二接入网节点侧的端点信息，其中，所述第二传输通道为所述第二接入网节点与第三接入网节点之间的对应于数据无线承载DRB的传输通道；
    所述第一接入网节点从所述第三接入网节点获取所述第二传输通道在所述第三接入网节点侧的端点信息；
    所述第一接入网节点向所述第二接入网节点发送所述第二传输通道在所述第三接入网节点侧的端点信息；
    所述第一接入网节点向所述第三接入网节点发送所述第二传输通道在所述第二接入网节点侧的端点信息；
    其中，所述第一接入网节点和所述第二接入网节点属于同一个接入网设备。
  2. 根据权利要求1所述的方法，其特征在于，在所述第一接入网节点从所述第三接入网节点获取所述第二传输通道在所述第三接入网节点侧的端点信息之前，所述方法还包括：
    所述第一接入网节点向所述第三接入网节点发送第一请求；
    所述第一接入网节点从所述第三接入网节点获取所述第二传输通道在所述第三接入网节点侧的端点信息，包括：
    所述第一接入网节点从所述第三接入网节点接收响应于所述第一请求的第一响应，所述第一响应包含所述第二传输通道在所述第三接入网节点侧的端点信息。
  3. 根据权利要求2所述的方法，其特征在于，下列中的至少一种满足：
    所述第一请求包含所述第三接入网节点的至少一个协议层的配置信息；
    所述第一接入网节点向所述第三接入网节点发送第一请求，包括：所述第一接入网节点在从第二接入网节点获取第二传输通道在所述第二接入网节点侧的端点信息之后，向第三接入网节点发送第一请求，其中，所述第一请求包含所述第二传输通道在所述第二接入网节点侧的端点信息。
  4. 根据权利要求1或2所述的方法，其特征在于，在所述第一接入网节点从第二接入网节点获取第二传输通道在所述第二接入网节点侧的端点信息之前，所述方法还包括：
    所述第一接入网节点向所述第二接入网节点发送第二请求；
    所述第一接入网节点从第二接入网节点获取第二传输通道在所述第二接入网节点侧的端点信息，包括：
    所述第一接入网节点从所述第二接入网节点接收响应于所述第二请求的第二响应，其中，所述第二响应包含所述第二传输通道在所述第二接入网节点侧的端点信息。
  5. 根据权利要求4所述的方法，其特征在于，所述第二请求包含第一传输通道在核心网侧的端点信息，所述第二响应还包含所述第一传输通道在所述第二接入网节点侧的端点信息，其中，所述第一传输通道为所述核心网与所述第二接入网节点之间的对应于所述DRB的传输通道。
  6. 根据权利要求4或5所述的方法，其特征在于，所述第一接入网节点向所述第二接入网节点发送第二请求，包括：
    所述第一接入网节点在从所述第三接入网节点获取所述第二传输通道在所述第三接入网节点侧的端点信息之后，向第二接入网节点发送第二请求，其中，所述第二请求包含所述第二传输通道在所述第三接入网节点侧的端点信息。
  7. 根据权利要求4至6中任一项所述的方法，其特征在于，在所述第一接入网节点向所述第二接入网节点发送第二请求之前，所述方法还包括：
    所述第一接入网节点从核心网或所述第二接入网节点获取流的信息，所述流的信息包括所述流的服务质量QoS信息；
    所述第一接入网节点根据所述流的信息，确定所述流映射到所述DRB，其中，所述第二请求包含指示所述流与所述DRB之间的映射关系的第一指示信息。
  8. 根据权利要求4至6中任一项所述的方法，其特征在于，在所述第一接入网节点向所述第二接入网节点发送第二请求之前，所述方法还包括：
    所述第一接入网节点从核心网获取流的信息；
    所述第二请求包含所述流的信息，所述第二响应包含指示所述流与所述DRB之间的映射关系的第一指示信息。
  9. 根据权利要求1至3中任一项所述的方法，其特征在于，所述第一接入网节点从第二接入网节点获取第二传输通道在所述第二接入网节点侧的端点信息，包括：
    所述第一接入网节点接收所述第二接入网节点发送的第三请求，所述第三请求包含指示所述DRB与流之间的映射关系的第一指示信息以及所述第二传输通道在所述第二接入网节点侧的端点信息；
    所述第一接入网节点向所述第二接入网节点发送所述第二传输通道在所述第三接入网节点侧的端点信息，包括：
    所述第一接入网节点根据所述第三请求，向所述第二接入网节点发送第三响应，所述第三响应包含所述第二传输通道在所述第三接入网节点侧的端点信息。
  10. 根据权利要求1至9中任一项所述的方法，其特征在于，所述方法还包括下列中的至少一种：
    所述第一接入网节点向所述第二接入网节点发送所述第二接入网节点的至少一个协议层的配置信息；
    所述第一接入网节点向所述第三接入网节点发送所述第三接入网节点的至少一个协议层的配置信息。
  11. 根据权利要求1至10中任一项所述的方法，其特征在于，所述方法还包括：
    所述第一接入网节点通过所述第三接入网节点向终端设备发送第二指示信息，所述第二指示信息用于指示所述DRB与流之间的映射关系。
  12. 一种通信方法，其特征在于，包括：
    第二接入网节点向第一接入网节点发送第二传输通道在所述第二接入网节点侧的端点信息，其中，所述第二传输通道为所述第二接入网节点与所述第三接入网节点之间的对应于数据无线承载DRB的传输通道；
    所述第二接入网节点从所述第一接入网节点接收所述第二传输通道在第三接入网节 点侧的端点信息；
    其中，所述第一接入网节点和所述第二接入网节点属于同一个接入网设备。
  13. 根据权利要求12所述的方法，其特征在于，在所述第二接入网节点向第一接入网节点发送第二传输通道在所述第二接入网节点侧的端点信息之前，所述方法还包括：
    所述第二接入网节点从所述第一接入网节点接收第二请求；
    所述第二接入网节点向第一接入网节点发送第二传输通道在所述第二接入网节点侧的端点信息，包括：
    所述第二接入网节点根据所述第二请求，向所述第一接入网节点发送第二响应，其中，所述第二响应包含所述第二传输通道在所述第二接入网节点侧的端点信息。
  14. 根据权利要求13所述的方法，其特征在于，下列中的至少一项满足：
    所述第二请求包含第一传输通道在核心网侧的端点信息，所述第二响应还包含所述第一传输通道在所述第二接入网节点侧的端点信息，其中，所述第一传输通道为所述核心网与所述第二接入网节点之间的对应于所述DRB的传输通道；
    所述第二请求包含所述第二传输通道在第三接入网节点侧的端点信息。
  15. 根据权利要求13所述的方法，其特征在于，所述第二接入网节点从所述第一接入网节点接收所述第二传输通道在第三接入网节点侧的端点信息，包括：
    所述第二接入网节点在向所述第一接入网节点发送第二响应之后，从所述第一接入网节点接收所述第二传输通道在第三接入网节点侧的端点信息。
  16. 根据权利要求13至15中任一项所述的方法，其特征在于，所述第二请求包含流的信息；
    在所述第二接入网节点根据所述第二请求，向所述第一接入网节点发送第二响应之前，所述方法还包括：
    所述第二接入网节点根据所述第二请求中包含的流的信息，确定所述流映射到所述DRB；
    所述第二响应还包含指示所述流与所述DRB之间的映射关系的指示信息。
  17. 根据权利要求13至15中任一项所述的方法，其特征在于，所述第二请求包含指示所述流与所述DRB之间的映射关系的指示信息。
  18. 根据权利要求17所述的方法，其特征在于，在所述第二接入网节点从所述第一接入网节点接收第二请求之前，所述方法还包括：
    所述第二接入网节点从核心网接收数据包；
    所述第二接入网节点从所述数据包获取所述数据包所属流的信息；
    所述第二接入网节点向所述第一接入网节点发送所述流的信息。
  19. 根据权利要求12所述的方法，其特征在于，所述方法还包括：
    所述第二接入网节点从核心网接收数据包；
    所述第二接入网节点从所述数据包获取所述数据包所属流的信息，所述流的信息包括所述流的服务质量QoS信息；
    所述第二接入网节点根据所述流的信息，确定所述流映射到所述DRB；
    所述第二接入网节点向第一接入网节点发送第二传输通道在所述第二接入网节点侧的端点信息，包括：
    所述第二接入网节点向所述第一接入网节点发送第三请求，所述第三请求包含指示所述流与所述DRB之间的映射关系的指示信息以及所述第二传输通道在所述第二接入网节点侧的端点信息；
    所述第二接入网节点从所述第一接入网节点接收所述第二传输通道在第三接入网节点侧的端点信息，包括：
    所述第二接入网节点从所述第一接入网节点接收响应于所述第三请求的第三响应，所述第三响应包含所述第二传输通道在第三接入网节点侧的端点信息。
  20. 根据权利要求12至19中任一项所述的方法，其特征在于，所述方法还包括：
    所述第二接入网节点从所述第一接入网节点接收所述第二接入网节点的至少一个协议层的配置信息；
    所述第二接入网节点根据所述第二接入网节点的至少一个协议层的配置信息，配置所述DRB。
  21. 一种通信方法，其特征在于，包括：
    第三接入网节点从第一接入网节点接收第二传输通道在第二接入网节点侧的端点信息，其中，所述第二传输通道为所述第二接入网节点与所述第三接入网节点之间的对应于数据无线承载DRB的传输通道；
    所述第三接入网节点向所述第一接入网节点发送所述第二传输通道在所述第三接入网节点侧的端点信息；
    其中，所述第一接入网节点和所述第二接入网节点属于同一个接入网设备。
  22. 根据权利要求21所述的方法，其特征在于，在所述第三接入网节点向所述第一接入网节点发送所述第二传输通道在所述第三接入网节点侧的端点信息之前，所述方法还包括：
    所述第三接入网节点从所述第一接入网节点接收第一请求；
    所述第三接入网节点向所述第一接入网节点发送所述第二传输通道在所述第三接入网节点侧的端点信息，包括：
    所述第三接入网节点根据所述第一请求，向所述第一接入网节点发送第一响应，所述第一响应包含所述第二传输通道在所述第三接入网节点侧的端点信息。
  23. 根据权利要求22所述的方法，其特征在于，下列中的至少一项满足：
    所述第一请求包含所述第二传输通道在第二接入网节点侧的端点信息；
    所述第一请求包含所述第三接入网节点的至少一个协议层的配置信息。
  24. 根据权利要求22所述的方法，其特征在于，所述第三接入网节点从第一接入网节点接收第二传输通道在第二接入网节点侧的端点信息，包括：
    所述第三接入网节点在向所述第一接入网节点发送第一响应之后，从所述第一接入网节点接收所述第二传输通道在所述第二接入网节点侧的端点信息。
  25. 一种通信方法，其特征在于，所述方法包括：
    第一源接入网节点向第一目标接入网节点发送第一切换请求，所述第一切换请求包含核心网与第二源接入网节点之间的传输通道在核心网侧的端点信息；
    所述第一源接入网节点从所述第一目标接入网节点接收第一切换响应，所述第一切换响应包含终端设备对应的数据转发通道在第二目标接入网节点侧的端点信息；
    所述第一源接入网节点向所述第二源接入网节点发送第一指示信息，所述第一指示信息包含所述数据转发通道在所述第二目标接入网节点侧的端点信息；
    所述第一源接入网节点向第三源接入网节点发送第二指示信息，所述第二指示信息用于指示所述第三源接入网节点释放所述终端设备的配置；
    其中，所述第一源接入网设备与所述第二源接入网设备属于同一个接入网设备，所述第一目标接入网节点和所述第二目标接入网节点属于同一个接入网设备。
  26. 一种通信方法，其特征在于，所述方法包括：
    第一目标接入网节点从第一源接入网节点接收第一切换请求，所述第一切换请求包含核心网与第二源接入网节点之间的传输通道在核心网侧的端点信息；
    所述第一目标接入网节点根据所述第一切换请求，向所述第二目标接入网节点发送第二切换请求；
    所述第一目标接入网节点从所述第二目标接入网节点接收响应于所述第二切换请求的第二切换响应，所述第二切换响应包含所述数据转发通道在所述第二目标接入网侧的端点信息；
    所述第一目标接入网节点向所述第一源接入网节点发送第一切换响应，所述第一切换响应包含所述数据转发通道在所述第二目标接入网侧的端点信息；
    其中，所述第一源接入网设备与所述第二源接入网设备属于同一个接入网设备，所述第一目标接入网节点和所述第二目标接入网节点属于同一个接入网设备。
  27. 一种通信装置，其特征在于，用于执行权利要求1至11中任一项所述的方法。
  28. 一种通信装置，其特征在于，用于执行权利要求12至20中任一项所述的方法。
  29. 一种通信装置，其特征在于，用于执行权利要求21至24中任一项所述的方法。
  30. 一种通信装置，其特征在于，用于执行权利要求25所述的方法。
  31. 一种通信装置，其特征在于，用于执行权利要求26所述的方法。
  32. 一种无线接入网络，其特征在于，包括权利要求27所述的通信装置、权利要求28所述的通信装置和权利要求29所述的通信装置。
  33. 一种无线接入网络，其特征在于，包括权利要求30所述的通信装置和权利要求31所述的通信装置。
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