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WO2015043292A1 - 一种x2消息通知的方法及家庭基站、x2网关 - Google Patents

一种x2消息通知的方法及家庭基站、x2网关 Download PDF

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Publication number
WO2015043292A1
WO2015043292A1 PCT/CN2014/082418 CN2014082418W WO2015043292A1 WO 2015043292 A1 WO2015043292 A1 WO 2015043292A1 CN 2014082418 W CN2014082418 W CN 2014082418W WO 2015043292 A1 WO2015043292 A1 WO 2015043292A1
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WO
WIPO (PCT)
Prior art keywords
base station
message
network layer
gateway
target base
Prior art date
Application number
PCT/CN2014/082418
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English (en)
French (fr)
Inventor
吴蕴璐
黄莹
高音
Original Assignee
中兴通讯股份有限公司
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Publication of WO2015043292A1 publication Critical patent/WO2015043292A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W40/00Communication routing or communication path finding
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W40/00Communication routing or communication path finding
    • H04W40/24Connectivity information management, e.g. connectivity discovery or connectivity update

Definitions

  • the present invention relates to an X2 message notification technology, and in particular, to a method for X2 message notification, and a home base station and an X2 gateway.
  • the home base station is a small, low-power base station that is deployed as a dedicated resource for private users in private places such as homes, groups, companies, or schools, and is connected by cable, digital subscriber line (DSL), or fiber optic cable.
  • the incoming device is connected to the carrier's core network.
  • the main role of the home base station is to provide users with higher service rates and to reduce the cost of using high-rate services, while at the same time making up for the inadequate coverage of existing distributed cellular wireless communication systems.
  • the advantages of the home base station include: low cost, easy to use (plug and play), low output power, saving the cost of the operator to set up and maintain the base station, and solving indoor coverage optimization.
  • LTE Long Term Evolution
  • HeNB Home Evolved NodeB
  • the schematic diagram of the network architecture as shown in Figure 1.
  • the UE User Equipment
  • the HeNBAN is composed of a HeNB and an evolved Home Base Station Gateway (HeNB GW, Home Evolved NodeB Gateway).
  • the functions supported by the HeNB are basically the same as those of the enhanced base station (eNB, evolved Node B), and only one cell is connected to one HeNB.
  • the HeNB GW is an optional network element.
  • the main functions of the HeNB GW are: relaying the UE-related S1 message, terminating the non-UE-related S1 message, and selecting the mobility management entity (MME, Mobility Management Entity) for the UE in the attaching process.
  • the SI interface is an interface between the eUTRAN (Evolved Radio Access Network) and the CN Node (Core Network Node).
  • the HeNB can directly connect to the Evolved Packet Core (EPC) through the S1 interface, where the HeNB passes the S1-
  • EPC Evolved Packet Core
  • the U interface is connected to a Serving Gateway (S-GW), and the HeNB is connected to the MME through an SI-MME interface.
  • S-GW Serving Gateway
  • the HeNB may also connect to the EPC through the HeNB GW, where the S1-U interface may terminate at the HeNB GW or terminate at the EPC, and the S1-MME interface passes through the HeNB GW to the EPC.
  • EPC network elements include MME and S-GW.
  • the MME is responsible for related functions such as bearer management and mobility management.
  • the S-GW assumes functions such as data routing on the user side.
  • the evolved home base station management system (HeMS, HeNB Management System) in FIG. 1 maintains and manages the HeNB, and configures and controls the HeNB according to the requirements of the operator, where the most important is to implement configuration functions for the HeNB, and the configured content.
  • HeMS evolved home base station management system
  • the Security Gateway supports security-related functions in the network.
  • the HeNB only provides services for specific users, so the concept of Closed Subscriber Group (CSG) is introduced to perform access control.
  • CSG Closed Subscriber Group
  • Each HeNB has a specific CSG attribute, including a closed member group identifier (CSG ID, CSG Identity) and an access mode.
  • CSG ID closed member group identifier
  • CSG Identity CSG Identity
  • three cell access modes are defined for the HeNB: Closed mode, only members of the closed member group identified by the corresponding CSG ID can access; Hybrid mode allows all UEs to be connected Incoming, but members of the closed member group with the corresponding CSG ID identifier enjoy higher priority; Open mode allows all UEs to access.
  • Release 10 and Release 11 agree to permit the establishment of a direct X2 interface for handover purposes in the following scenarios: between the eNB and the HeNB in the open mode, between the HeNB in the eNB and the hybrid mode, and the HeNB in the source closed mode to the target eNB, The HeNB in the open mode and the HeNB in the open/hybrid mode, the HeNB in the source closed mode to the HeNB in the target open/hybrid mode, the HeNB in the source hybrid/closed mode with the same PLMN ID and CSG ID, to the HeNB in the target closed mode.
  • the HeNB may be a direct X2 connection between the eNB and the HeNB, or may be an indirect X2 connection through a new functional entity X2 gateway (X2 Gateway, X2 GW) similar to the HeNB GW.
  • X2 Gateway X2 Gateway
  • the source side routes the X2 message based on the target side's Radio Network Layer (RNL), and the (H)eNB uses the new registration message when it is powered on.
  • the X2 GW establishes and maintains a matching relationship between the RNL ID and the Transport Network Layer (TNL) address, the IP address configuration of the X2 GW, and the HeNB, the eNB, or the TNL address discovery process to learn the X2 GW.
  • RNL ID Radio Network Layer
  • TNL Transport Network Layer
  • the scheme of the IP address is used as a candidate for the X2 GW.
  • the eNB obtains the TNL address of the X2 GW through the process of TNL address discovery, or when the eNB does not register with the X2 GW configured with the IP address after the eNB is powered on, if the HeNB discovers the cell served by the eNB, and It is decided to establish an indirect X2 connection with the eNB.
  • the HeNB sends an X2 setup request message matching relationship with the RNL ID identifier of the target eNB, and the X2 GW cannot route the X2 setup request message to the target eNB.
  • the HeNB carries the RNL ID and the TNL address of the eNB in the X2 setup request message, the registration message, or the registration update message sent to the X2 GW. The proposal was presented.
  • the HeNB and the HeNB or the eNB are connected to different X2 GWs, the HeNB cannot establish an indirect X2 interface through the X2 GW. How does the HeNB know that the HeNB or the eNB that is discovered is not connected to the same X2 GW, so as to avoid a large amount of row overhead caused by the HeNB continuously trying to establish an indirect X2 connection to the discovered HeNB or eNB is a problem to be solved by the present invention. .
  • the direct X2 interface between the eNB and the HeNB pair and the HeNB and the HeNB pair cannot be established at the same time and the X2 interface that establishes the proxy through the X2 GW. That is, a direct X2 interface is not established between an eNB and a HeNB pair, and a H2 pair is not established, and an X2 interface proxyed by the X2 GW is not established.
  • HeNB2 and HeNB3 intend to establish a proxy X2 connection through the X2 GW
  • eNB 1 and HeNB2 intend to establish a proxy X2 connection through the X2 GW
  • eNB 1 and HeNB 3 intend to establish a direct X2 connection.
  • the IP address of the X2 GW is configured for the HeNB. Therefore, after the HeNB2 and the HeNB3 are powered on, a new registration message can be used to establish and maintain a matching relationship between the RNL ID and the TNL address in the X2 GW. At the same time, when the IP address of the X2 GW is configured for the eNB, after the eNB is powered on, a new registration message can be used to establish and save the matching relationship between the RNL ID and the TNL address in the X2 GW. A direct X2 connection is established between eNB 1 and HeNB 3.
  • the technical problem to be solved by the embodiments of the present invention is to provide a method for notifying the X2 message and the home base station and the X2 gateway, so as to know the reason why the X2 setup request message cannot be routed to the target eNB, or reduce the number of TNL address discovery processes.
  • a method for notification of X2 messages including:
  • the home base station receives an X2 message of the X2 gateway, where the X2 message carries a cause value indicating that the route cannot be routed to the target base station;
  • the home base station initiates a transport network layer address discovery process according to the cause value, to the
  • the X2 gateway sends the information required by the X2 gateway, or the home base station does not initiate an X2 setup request according to the cause value.
  • the cause value includes: failing to be routed to the target base station because there is no matching relationship between the radio network layer identifier of the target base station and the transport network layer address;
  • the step of the home base station initiating a transport network layer address discovery process according to the cause value, and sending the information required by the X2 gateway to the X2 gateway includes:
  • the home base station initiates a transport network layer address discovery process, and acquires a transport network layer address of the target base station;
  • the home base station sends an X2 message to the X2 gateway, where the X2 message carries a radio network layer identifier of the target base station and an acquired transport network layer address of the target base station.
  • the cause value includes: the home base station and the target base station are not connected to the same X2 gateway and cannot be routed to the target base station;
  • the step of the home base station not initiating the X2 establishment request according to the cause value includes: the home base station does not initiate the X2 establishment when rediscovering the cell served by the target base station and determining to establish an indirect X2 connection to the target base station request.
  • the X2 message includes an X2 setup failure message.
  • a home base station includes a receiving module and a processing module, where:
  • the receiving module is configured to: receive an X2 message of the X2 gateway, where the X2 message carries a cause value indicating that the route cannot be routed to the target base station;
  • the processing module is configured to: initiate a transport network layer address discovery process according to the cause value, send information required by the X2 gateway to the X2 gateway, or not initiate an X2 setup request.
  • the cause value includes: failing to be routed to the target base station because there is no matching relationship between the radio network layer identifier of the target base station and the transport network layer address;
  • the processing module is configured to initiate a transport network layer address discovery process according to the cause value, and send the information required by the X2 gateway to the X2 gateway: initiate a transport network layer address discovery process, and acquire the target base station Transmitting a network layer address; sending an X2 message to the X2 gateway, the X2 message carrying a radio network layer identifier of the target base station and an acquired transport network layer address of the target base station.
  • the cause value includes: the home base station and the target base station are not connected to the same X2 gateway and cannot be routed to the target base station;
  • the processing module is configured to not initiate an X2 setup request according to the cause value according to the following manner: When the cell served by the target base station is rediscovered and an indirect X2 connection to the target base station is determined, an X2 setup request is not initiated.
  • the X2 message received by the receiving module includes an X2 setup failure message.
  • a method for notification of X2 messages including:
  • the home base station sends a first X2 message to the X2 gateway, where the first X2 message carries indication information that returns the address of the target base station;
  • the X2 gateway returns a second X2 message to the home base station, where the second X2 message carries a transport network layer address of the target base station saved by the X2 gateway or a transport network layer address that does not carry the target base station;
  • the home base station receives, by the home base station, the second X2 message, where the home base station is configured according to the second X2 Establishing a direct X2 connection with the target base station or initiating a transport network layer address discovery process.
  • the home base station establishes a direct X2 connection with the target base station or initiates transmission network layer address discovery.
  • the step of the process includes: after obtaining the transport network layer address of the target base station, establishing a direct X2 connection with the target base station;
  • the step of the home base station establishing a direct X2 connection with the target base station or initiating a transport network layer address discovery process includes: initiating a transport network layer The address discovery process acquires a transport network layer address of the target base station.
  • the first X2 message includes: an X2 setup request message,
  • the second X2 message includes: an X2 setup failure message.
  • a home base station includes a sending module, a receiving module, and a processing module, where:
  • the sending module is configured to: send a first X2 message to the X2 gateway, where the first X2 message carries indication information that returns a target macro base station address;
  • the receiving module is configured to: receive a second X2 message returned by the X2 gateway, where the second X2 message carries a transport network layer address of the target macro base station saved by the X2 gateway or does not carry the target macro base station Transport network layer address;
  • the processing module is configured to: establish a direct X2 connection with the target base station or initiate a transport network layer address discovery process according to the second X2 message.
  • the processing module is configured to establish a direct X2 connection with the target base station or initiate a transport network layer address discovery process according to the second X2 message according to: when the second X2 message carries the X2 When the home network base station obtains the transport network layer address of the target base station, the home base station establishes a direct X2 connection with the target base station; when the second X2 message is not carried When the target base station transmits the network layer address, the home base station initiates a transport network layer address discovery process, and acquires a transport network layer address of the target base station.
  • the first X2 message includes: an X2 setup request message
  • the second X2 message includes: an X2 setup failure message.
  • a method for notification of X2 messages including:
  • the X2 gateway receives the X2 setup request message sent by the home base station;
  • the X2 gateway sends an X2 message to the home base station, where the X2 message carries a transport network layer that is saved by the target base station at the X2 gateway. Address or instructions for carrying a direct connection.
  • the X2 message includes an X2 setup failure message.
  • An X2 gateway includes a receiving module and a sending module, where:
  • the receiving module is configured to: receive an X2 setup request message sent by the home base station; the sending module is configured to: if the connection between the home base station and the target base station is a direct X2 connection, return an X2 message to the home base station, where The X2 message carries the transport network layer address saved by the macro base station at the X2 gateway and the indication information carrying the direct connection.
  • the X2 message includes an X2 setup failure message.
  • the method for the X2 message notification of the foregoing technical solution and the home base station and the X2 gateway may know the reason that the X2 setup request message cannot be routed to the target eNB, and the HeNB may carry the RNL ID and the TNL address of the eNB in the X2 message sent to the X2 GW.
  • the X2 GW saves the matching relationship between the RNL ID and the TNL address of the eNB, so as to ensure that the subsequent X2 setup request message is correctly routed to the target eNB, and also avoids unnecessary unnecessary X2 signaling overhead, or reduces the number of TNL address discovery processes. . BRIEF abstract
  • FIG. 1 is a schematic diagram of a network architecture in which a HeNB is located in a related art
  • FIG. 2 is a schematic diagram of an E-UTRAN architecture of a related art X2 GW deployment
  • FIG. 3 is a schematic structural diagram of a HeNB according to an embodiment of the present invention.
  • FIG. 4 is a schematic flowchart of a method according to Embodiment 1 of the present invention
  • FIG. 5 is a schematic flowchart of a method according to Embodiment 2 of the present invention
  • FIG. 4 is a schematic flowchart of a method according to Embodiment 1 of the present invention
  • FIG. 5 is a schematic flowchart of a method according to Embodiment 2 of the present invention
  • FIG. 4 is a schematic flowchart of a method according to Embodiment 1 of the present invention
  • FIG. 5 is a schematic flowchart of a method according to Embodiment 2 of the present invention
  • FIG. 6 is a schematic flowchart of a method according to Embodiment 3 of the present invention.
  • FIG. 7 is a schematic structural diagram of a HeNB according to an embodiment of the present invention.
  • FIG. 8 is a schematic flowchart of a method according to Embodiment 4 of the present invention.
  • FIG. 9 is a schematic structural diagram of an X2 GW according to an embodiment of the present invention.
  • An embodiment of the present invention provides a method for notifying an X2 message, including the following steps: Step 11: The HeNB receives an X2 message of the X2 GW, where the X2 message carries a cause value indicating that the target eNB or the target HeNB cannot be routed. ;
  • Step 12 The HeNB initiates a transmission network layer address discovery process according to the cause value, and sends the information required by the X2 gateway to the X2 gateway, or the HeNB does not initiate an X2 establishment request according to the cause value.
  • a HeNB is provided correspondingly according to the embodiment of the present invention. As shown in FIG. 3, the HeNB of this embodiment includes
  • the receiving module 301 is configured to: receive an X2 message of the X2 gateway, where the X2 message carries a cause value indicating that the route cannot be routed to the target base station;
  • the processing module 302 is configured to: initiate a transport network layer address discovery process according to the cause value, send the information required by the X2 gateway to the X2 gateway, or not initiate an X2 setup request.
  • the receiving module 301 the received value of the X2 message carries: the number of the wireless network layer identifier of the target base station is not matched with the transmission network layer address. Routing to the target base station;
  • the processing module 302 is configured to initiate a transport network layer address discovery process according to the cause value, and send the information required by the X2 gateway to the X2 gateway: initiate a transport network layer address discovery process, and obtain the target The transmission network layer address of the base station; to the X2 gateway And sending an X2 message, where the X2 message carries a radio network layer identifier of the target base station and an acquired transport network layer address of the target base station.
  • the receiving module 301 receives the cause value of the X2 message: the home base station and the target base station are not connected to the same X2 gateway and cannot be routed to the target.
  • Base station
  • the processing module 302 is configured to not initiate an X2 setup request according to the cause value according to the following manner: When the cell served by the target base station is found and the indirect X2 connection to the target base station is determined to be established, the X2 setup request is not initiated.
  • the method and the HeNB of the embodiment of the present invention can enable the HeNB to learn the reason why the X2 GW cannot route the X2 setup request message to the target eNB, and accordingly take corresponding measures.
  • the eNB obtains the TNL address of the X2 GW through the process of TNL address discovery, and the X2 GW does not find the storage itself when receiving the X2 setup request message from the HeNB with the RNL ID of the target eNB.
  • the X2 GW carries a new cause value in the X2 message sent to the HeNB, such as "matching information is not available", “agnostic target address", "routing is not supported”, etc., so that the source HeNB knows that the X2 GW is due to no
  • the target eNB's RNL ID and TNL address match relationship cannot be routed to the target eNB end.
  • the X2 message can be an X2 setup failure message.
  • the source HeNB may send the RNL ID of the target eNB and the TNL address of the target eNB obtained through the TNL address discovery process to the X2 GW in a subsequent process, for example, causing the HeNB to establish a request message, a registration message, or a registration in the X2 sent to the X2 GW.
  • the update message carries the RNL ID and the TNL address of the eNB, so that the X2 GW establishes a connection with the SCTP (STREAM CONTROL TRANSMISSION PROTOCOL) of the eNB, and causes the X2 GW to maintain the matching relationship between the RNL ID and the TNL address of the eNB. Thereby ensuring that the subsequent X2 setup request message is correctly routed to the target eNB.
  • FIG. 4 is a schematic flowchart of the embodiment, as shown in FIG. 4, including the following steps:
  • Step 401 The IP address of the X2 GW is configured for the HeNB, and after the HeNB is powered on, The matching relationship between the RNL ID and the TNL address is established and saved in the X2 GW through the registration process.
  • Step 402 After discovering the cell served by the eNB, the HeNB decides to establish an indirect X2 connection to the eNB.
  • Step 403 The HeNB sends an X2 setup request message with the RNL ID of the target eNB to the X2 GW.
  • Step 404 At this time, the matching relationship between the RNL ID and the TNL address of the eNB is not saved at the X2 GW, the X2 GW cannot route the X2 setup request message to the target eNB, and the X2 GW returns the X2 message to the HeNB, and carries the new X2 message in the returned X2 message.
  • the cause value such as "matching information not available", "unknown target address", "routing is not supported", etc., so that the source HeNB knows that the X2 GW is unable to match the RNL ID and TNL address of the target eNB.
  • Route X2 establishes a request message to the target eNB.
  • the X2 message can be an X2 setup failure message.
  • Step 405 The HeNB initiates a TNL address discovery process to obtain the TNL address of the eNB.
  • Step 406 The source HeNB learns, by step 404, that the X2 GW cannot route the X2 setup request message to the target eNB, and carries the RNL ID of the eNB in the X2 setup request message, the registration message, or the registration update message sent to the X2 GW, and in step 405.
  • the TNL address of the acquired eNB After obtaining the RNL ID and the TNL address of the eNB, the X2 GW can maintain the matching relationship between the RNL ID and the TNL address of the eNB, and establish an SCTP connection between the X2 GW and the eNB.
  • Step 407 The HeNB sends an X2 setup request message with the RNL ID of the target eNB to the X2 GW.
  • the X2 GW routes the X2 setup request message to the corresponding target eNB according to the matching relationship between the RNL ID and the TNL address of the stored eNB.
  • Step 408 The eNB replies with an X2 setup response message with the RNL ID of the target HeNB to the X2 GW, and the X2 GW routes the X2 setup response message to the corresponding target HeNB according to the matching relationship between the stored ReNB ID and the TNL address of the HeNB. At the office.
  • HeNB1 When HeNB1 is registered on X2 GW1, HeNB2 or eNB2 is registered in X2 GW2. In this scenario, HeNB1 and HeNB2 or eNB2 cannot establish an indirect X2 interface through X2 GW1.
  • the X2 GW carries a new cause value in the X2 message sent to the HeNB, for example "not in the same
  • the source HeNB learns that the source HeNB is not connected to the newly discovered HeNB or eNB on the same X2 GW.
  • the X2 message may be an X2 setup failure message.
  • the source HeNB may no longer attempt to establish a new discovery. Indirect X2 connection of the HeNB or eNB, thereby avoiding a large amount of unnecessary X2 signaling overhead.
  • FIG. 5 is a schematic flowchart of the embodiment, as shown in FIG. 5, including the following steps:
  • Step 501 The IP address of the X2 GW1 is configured for the HeNB1. After the power is turned on, the matching relationship between the RNL ID and the TNL address of the HeNB1 is established and saved in the X2 GW1 through the registration process.
  • Step 502 The IP address of the X2 GW2 is configured for the HeNB2 or the eNB2. After the power is turned on, the RNL ID and the TNL address of the HeNB2 or the eNB2 are established and saved in the X2 GW2 through the registration procedure.
  • Step 503 After discovering the cell served by HeNB2 or eNB2, HeNB1 decides to establish an indirect X2 connection to HeNB2 or eNB2.
  • Step 504 HeNB1 sends an X2 setup request message with the RNL ID of the target HeNB2 or eNB2 to X2 GW1.
  • Step 505 X2 GW1 returns an X2 message to HeNB1, and may carry a new cause value in the returned X2 message, because there is no matching relationship between the RNL ID and the TNL address of the HeNB2 or the matching relationship between the RNL ID and the TNL address of the eNB2 in the X2 GW1. , for example, "not under the same X2 GW" and so on.
  • the X2 message can be an X2 setup failure message.
  • the HeNB1 After receiving the X2 message with the special cause value, the HeNB1 can learn that the HeNB1 is not connected to the same X2 GW as the HeNB2 or the eNB2, and then the HeNB1 re-discovers the cell served by the HeNB2 or the eNB2, and decides to establish to the HeNB2 or the eNB2.
  • the X2 setup request message to X2 GW1 can be avoided.
  • the source HeNB When the source HeNB decides to establish a direct X2 connection to the target eNB according to its saved X2 connection mode, the source HeNB carries the request return target in the X2 message sent to the target eNB.
  • the indication information of the TNL address of the eNB, where the X2 message may be an X2 setup request message.
  • the X2 GW After the X2 GW receives the X2 message, if there is already a matching relationship between the RNL ID and the TNL address of the target eNB at the X2 GW, the X2 GW does not route the X2 message according to the matching relationship between the stored RNL ID and the TNL address of the target eNB.
  • the X2 message is sent to the source HeNB, and the X2 message carries the TNL address of the target eNB, and the X2 message may be an X2 setup failure message, so that the subsequent source HeNB directly initiates direct transmission to the target eNB.
  • the establishment of the X2 connection is a condition in which the X2 message is sent.
  • FIG. 6 is a schematic flowchart of the embodiment. As shown in FIG. 6, the method includes the following steps:
  • Step 601 The IP address of the X2 GW is configured for the HeNB2. After the HeNB2 is powered on, the registration process is used to establish and save the matching relationship between the RNL ID and the TNL address of the HeNB2 in the X2 GW.
  • Step 602 The IP address of the X2 GW is configured for the HeNB3. After the HeNB3 is powered on, the registration process is used to establish and save the matching relationship between the RNL ID and the TNL address of the HeNB3 in the X2 GW.
  • Step 603 If the IP address of the X2 GW is configured for the eNB 1, the eNB 1 establishes and stores the matching relationship between the RNL ID and the TNL address of the eNB1 in the X2 GW through the registration process after the eNB 1 is powered on. The eNB 1 can also obtain the TNL address of the X2 GW through the TNL address discovery process, that is, the step 603 is omitted. Then, after the step 602, there is no matching relationship between the RNL ID and the TNL address of the eNB 1 in the X2 GW.
  • Step 604 After the HeNB3 discovers the cell served by the eNB1, it establishes a direct X2 connection to the eNB1 according to the manner of the X2 connection stored at the HeNB3.
  • Step 605 HeNB3 sends an X2 message with the RNL ID of the target eNB1 to the X2 GW.
  • the X2 message also carries indication information requesting to return the TNL address of the eNB 1.
  • the X2 message can be an X2 setup request message.
  • Step 606 If the X2 GW saves the RNL ID and the TNL address matching relationship of the eNB 1 in step 603, after the X2 GW receives the X2 setup request message with the indication information requesting to return the TNL address of the eNB1, the X2 GW does not Routing the X2 setup request message to the corresponding target eNB 1 according to the stored matching relationship between the RNL ID and the TNL address of the eNB1, but replying
  • the X2 message is sent to HeNB3, and the message may be a ⁇ 2 setup failure message, and the TNL address saved when eNB1 registers at the X2 GW is returned to HeNB3 in the X2 message.
  • the X2 GW does not save the RNL ID and the TNL address matching relationship of the eNB1, and then returns the X2 message to the HeNB3 after receiving the X2 setup request message with the indication information requesting the return of the TNL address of the eNB1.
  • the message may be an X2 setup failure message, and the message does not carry the TNL address information of the eNB1.
  • HeNB3 may initiate a TNL address discovery process to acquire the TNL address of eNB 1.
  • Step 607 After obtaining the TNL address of the eNB1, the HeNB3 establishes a direct X2 connection with the eNB1.
  • Step 608 After the HeNB2 finds the cell served by the eNB1, it establishes an indirect X2 connection to the eNB 1 according to the manner of the X2 connection stored at the HeNB2.
  • Step 609 HeNB2 sends an X2 setup request message with the RNL ID of the target eNB1 to the X2 GW. If the X2 GW stores the matching relationship between the RNL ID and the TNL address of the eNB1, the X2 GW according to the stored RNL ID and TNL of the eNB1. The matching relationship of the addresses to route the X2 setup request message to the corresponding target eNB 1.
  • the eNB 1 replies with the X2 Setup Response message with the RNL ID of the target HeNB2 to the X2 GW, and the X2 GW routes the X2 Setup Response message to the corresponding target HeNB2 according to the matching relationship between the stored RNL ID of the HeNB2 and the TNL address.
  • An HeNB is provided in this embodiment. As shown in FIG. 7, the method includes:
  • the sending module 701 is configured to: send a first X2 message to the X2 gateway, where the first X2 message carries indication information that returns a target macro base station address;
  • the receiving module 702 is configured to: receive a second X2 message returned by the X2 gateway, where the second X2 message carries a transport network layer address of the target macro base station saved by the X2 gateway or does not carry the target macro base station Transport network layer address;
  • the processing module 703 is configured to: establish a direct X2 connection with the target base station or initiate a transport network layer address discovery process according to the second X2 message.
  • the processing module 701 is configured to send, according to the second X2 message, information required by the X2 GW to the X2 gateway according to the second X2 message or not to initiate an X2 setup request: when the second X2 message carries the When the X2 gateway saves the transmission network layer address of the target base station, After the home base station obtains the transport network layer address of the target base station, establishing a direct X2 connection with the target base station; when the second X2 message does not carry the transport network layer address of the target base station, the family The base station initiates a transport network layer address discovery process to obtain a transport network layer address of the target base station.
  • the sending, by the sending module 701, the first X2 message includes: an X2 setup request message,
  • the receiving module 702, the received second X2 message includes: an X2 setup failure message.
  • X2 GW When X2 GW receives the X2-HeNB transmits the setup request message, and decided to establish the time of the target eNB directly X2 connection according save an X2 connection, if X2 GW Department has targeted e NB the RNL ID and TNL address The matching relationship, the X2 GW does not route the X2 message to the corresponding target eNB according to the matching relationship between the stored RNL ID and the TNL address of the target eNB, but sends the X2 message to the source HeNB, and carries the target eNB in the X2 message.
  • the TNL address, the X2 message may be an X2 setup failure message, such that the subsequent source HeNB directly initiates the establishment of a direct X2 connection to the target eNB.
  • the X2 GW When the X2 GW receives the X2 setup request message sent by the source HeNB and determines the direct X2 connection to the target eNB according to the saved X2 connection manner, if there is no matching relationship between the RNL ID and the TNL address of the target eNB at the X2 GW The X2 GW sends the X2 message to the source HeNB, and carries the direct connection indication information in the X2 message, where the message may be an X2 setup failure message, so that the subsequent source HeNB initiates the TNL address discovery process to acquire the TNL address of the eNB to establish A direct X2 connection to the target eNB.
  • FIG. 8 is a schematic flowchart of the embodiment, as shown in FIG. 8, including the following steps:
  • Step 801 - Step 803 The same as Step 301 - Step 303 in Embodiment 2, and details are not described herein.
  • Step 804 HeNB3 discovers the cell served by eNB1.
  • Step 805 HeNB3 sends an X2 setup request message with the RNL ID of the target eNB1 to X2 GW.
  • Step 806 The X2 GW determines that a direct X2 connection is established between the HeNB3 and the eNB 1 according to the stored manner of the X2 connection. If the X2 GW saves the RNL ID and the TNL address matching relationship of the eNB1 in step 803, the X2 GW does not according to the matching relationship between the stored RNL ID and the TNL address of the eNB1 after receiving the X2 setup request message of step 805. The X2 setup request message is routed to the corresponding target eNB1, but the X2 message is replied to the HeNB3. The message may be an X2 setup failure message, and the TNL address saved when the eNB1 registers at the X2 GW is returned to the HeNB3 in the X2 message.
  • the X2 GW determines that a direct X2 connection is to be established between HeNB3 and eNB1 according to the manner of the stored X2 connection. If the step 803 is not performed, the X2 GW does not save the RNL ID and the TNL address matching relationship of the eNB1. Then, after receiving the X2 setup request message of the step 805, the X2 GW returns an X2 message to the HeNB3, and the message may be an X2 setup failure message. The X2 GW carries the indication of the direct connection in the X2 message. After receiving the X2 message carrying the direct connection indication information, the HeNB3 may initiate a TNL address discovery process to obtain the TNL address of the eNB1.
  • Step 807 The same as step 307 in the second embodiment, and details are not described herein again.
  • Step 808 HeNB2 discovers the cell served by eNB1.
  • Step 809 The HeNB2 sends an X2 setup request message with the RNL ID of the target eNB1 to the X2 GW.
  • the X2 GW determines that an indirect X2 connection is to be established between the HeNB2 and the eNB1 according to the stored X2 connection. If the matching relationship between the RNL ID and the TNL address of the eNB 1 is stored at the X2 GW, the X2 GW routes the X2 setup request message to the corresponding target eNB1 according to the stored matching relationship between the RNL ID and the TNL address of the eNB 1.
  • the eNB1 replies with the X2 setup response message with the RNL ID of the target HeNB2 to the X2 GW, and the X2 GW routes the X2 setup response message to the corresponding target HeNB2 according to the matching relationship between the RNL ID and the TNL address of the stored HeNB2.
  • An X2 GW is provided for the embodiment. As shown in FIG. 9, the method includes:
  • the receiving module 901 is configured to: receive an X2 setup request message sent by the home base station; the sending module 902 is configured to: if the connection between the home base station and the target macro base station is a direct X2 connection, return an X2 message to the home base station, where The X2 message carries the transport network layer address saved by the macro base station at the X2 gateway and the indication information carrying the direct connection.
  • the sending, by the sending module 902, the X2 message may include an X2 setup failure message.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module.
  • the invention is not limited to any particular combination of hardware and software.
  • the method for the X2 message notification of the foregoing technical solution and the home base station and the X2 gateway may be aware of the reason that the X2 setup request message cannot be routed to the target eNB, and the HeNB may carry the RNL ID of the eNB in the X2 message sent to the X2 GW. And the TNL address, so that the X2 GW saves the matching relationship between the RNL ID and the TNL address of the eNB, so as to ensure that the subsequent X2 setup request message is correctly routed to the target eNB, and also avoids unnecessary unnecessary X2 signaling overhead or reduces TNL address discovery.
  • the number of processes. Therefore, the present invention has strong industrial applicability.

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Abstract

本发明提供一种X2消息通知的方法及家庭基站(HeNB)、X2网关,该方法包括如下步骤:家庭基站接收X2网关的X2消息,所述X2消息携带用于表明无法路由至目标基站的原因值;所述HeNB根据所述原因值进行相应处理。通过本发明可以获知无法路由X2建立请求消息到目标演进型基站(eNB)的原因,可以使HeNB在发送给X2网关(GW)的X2消息中携带eNB的无线网络层标识(RNL ID)和传输网络层(TNL)地址,使得X2GW保存eNB的RNL ID和TNL地址的匹配关系,从而保证后续X2建立请求消息正确路由到目标eNB。

Description

一种 X2消息通知的方法及家庭基站、 X2网关
技术领域
本发明涉及 X2消息通知技术, 尤其涉及一种 X2消息通知的方法及家庭 基站、 X2网关。
背景技术
家庭基站是一种小型的低功率基站, 作为私人用户的专用资源被部署在 家庭、 团体、 公司或者学校等私人场所, 通过电缆、 数字用户线路(Digital Subscriber Line, 简称 DSL )或者光纤等有线接入设备连接到运营商的核心 网。 家庭基站的主要作用是给用户提供更高的业务速率, 并降低使用高速率 业务所需要的花费, 同时弥补已有分布式蜂窝无线通讯系统的覆盖不足。 家 庭基站的优点包括: 低成本、 使用方便(即插即用) 、 低输出功率、 节省了 运营商架设和维护基站的费用、 解决室内覆盖优化等。
在长期演进 (LTE , Long Term Evolution ) 系统中, 演进的家庭基站
( HeNB , Home Evolved NodeB ) 所在的网络架构示意图, 如图 1 所示。 HeNB下的终端( UE, User Equipment )是基于相关的空口协议接入演进的家 庭基站接入网( HeNBAN, Home Evolved NodeB Access Network )。 HeNBAN 是由 HeNB 和演进的家庭基站网关 (HeNB GW, Home Evolved NodeB Gateway )组成。 HeNB所支持的功能与增强型基站( eNB , evolved Node B ) 基本一致, 一个 HeNB下仅连接一个小区。 HeNB GW是可选的网元。 HeNB GW的主要功能为: 中继 UE相关的 S1消息, 终结非 UE相关的 S1消息, 在 附着过程中替 UE选择移动管理实体(MME, Mobility Management Entity ) 等。 SI接口为 eUTRAN (演进的无线接入网 )和 CN Node (核心网节点 )之 间的接口, HeNB 可以通过 S1 接口直接连接到演进的分组核心 (EPC, Evolved Packet Core ), 其中 HeNB通过 S1-U接口连接到服务网关( S-GW, Serving Gateway ) , HeNB通过 SI -MME接口连接到 MME。 HeNB也可以通 过 HeNB GW连接到 EPC, 其中 S1-U接口可以终止在 HeNB GW, 或者终止 在 EPC, S1-MME接口经过 HeNB GW到 EPC。 EPC 网元包括 MME和 S-GW。 MME承担着承载管理、 移动性管理等相关功能。 S-GW承担着用户 面的数据路由等功能。 此外, 图 1 中的演进的家庭基站管理系统(HeMS, HeNB Management System )对 HeNB进行维护和管理, 根据运营商的要求配 置和控制 HeNB, 其中最主要的是为 HeNB实现配置功能, 配置的内容包括 位置信息的核实、 HeNB的参数、 核心网的参数、 无线接入网 (RAN, Radio Access Network )的参数以及无线频率(RF, Radio Frequency )的参数。 安全 网关 (SeGW, Security Gateway ) 支持网络中的安全相关的功能。
HeNB 只为特定用户提供服务, 因此引进了封闭成员组(CSG, Closed Subscriber Group )的概念来执行接入控制。 每个 HeNB都具有特定的 CSG属 性, 包括封闭成员组标识 (CSG ID, CSG Identity )及接入模式。 这里为 HeNB定义了三种小区接入模式( Cell Access Mode ): 封闭 ( Close )模式, 只有相应的 CSG ID标识的封闭成员组成员才可以接入; 混合 ( Hybrid )模 式, 允许所有的 UE接入, 但有相应的 CSG ID标识的封闭成员组成员享有更 高的优先级; 开放(Open )模式, 允许所有的 UE接入。
第三代合作伙伴计划 (3GPP , 3rd Generation Partnership Project ) 在
Release 10和 Release 11的时候同意在以下场景下准许建立用于切换目的的直 接 X2接口: eNB和 open模式的 HeNB之间、 eNB和 hybrid模式的 HeNB之 间、 源 closed模式的 HeNB到目标 eNB、 open模式的 HeNB和 open/hybrid模 式的 HeNB之间、 源 closed模式的 HeNB到目标 open/hybrid模式的 HeNB、 具有相同 PLMN ID和 CSG ID的源 hybrid/closed模式的 HeNB到目标 closed 模式的 HeNB。 eNB和 HeNB之间、 HeNB之间可以通过是直接的 X2连接 , 也可以是通过类似 HeNB GW的新的功能实体 X2网关 ( X2 Gateway, 简称 X2 GW )的间接 X2连接。 在引入 X2 GW方案的讨论过程中, 源侧基于目标 侧的无线网络层 (RNL, Radio Network Layer )标识 (ID, Identity )路由 X2消息、 (H)eNB在开机的时候使用新的注册消息来在 X2 GW中建立和保存 RNL ID和传输网络层(TNL, Transport Network Layer )地址的匹配关系、 X2 GW的 IP地址配置给 HeNB、 eNB通过配置的方式或者通过 TNL地址发 现过程来获知 X2 GW的 IP地址的方案作为 X2 GW的候选方案。 在该候选方 案中存在如下问题: 由于 X2 GW的 IP地址是配置给 HeNB的, 因此 HeNB 一开机上电后, 即可以使用新的注册消息来在 X2 GW中建立和保存 RNL ID 和 TNL地址的匹配关系。 当 eNB通过 TNL地址发现的过程来获取 X2 GW的 TNL地址的时候, 或者当 eNB开机上电后还未在配置了 IP地址的 X2 GW进 行注册的时候, 如果 HeNB发现了 eNB服务的小区后并决定要与该 eNB建立 间接 X2连接 , HeNB发送带有目标 eNB的 RNL ID标识的 X2建立请求消息 匹配关系, X2 GW无法路由 X2建立请求消息到目标 eNB。 为了解决该问 题, 有关于在 HeNB获知 X2 GW无法路由 X2建立请求消息到目标 eNB后, HeNB在发送给 X2 GW的 X2建立请求消息、 注册消息或者注册更新消息中 携带 eNB的 RNL ID和 TNL地址的方案被提出。 HeNB如何获知 X2 GW是 由于没有目标 eNB的 RNL ID和 TNL地址匹配关系而无法路由 X2建立请求 消息到目标 eNB是本发明要解决的问题。
当 HeNB同他发现的 HeNB或者 eNB是连接在不同的 X2 GW上时, HeNB同发现的 HeNB或者 eNB之间是不能通过 X2 GW建立间接 X2接口 的。 HeNB如何获知同发现的 HeNB或者 eNB不是连接在同一个 X2 GW上 的 , 从而避免 HeNB不断尝试建立到发现的 HeNB或者 eNB的间接的 X2连 接而造成的大量行令开销是本发明要解决的问题。
eNB和 HeNB对之间、 HeNB和 HeNB对之间不能同时建立直接的 X2 接口和通过 X2 GW建立代理的 X2接口。 也即, 一个 eNB和 HeNB对之间、 一个 HeNB对之间要不建立直接的 X2接口, 要不建立通过 X2 GW代理的 X2接口。 如图 2所示, HeNB2和 HeNB3意图通过 X2 GW建立代理的 X2 连接 , eNB 1和 HeNB2意图通过 X2 GW建立代理的 X2连接 , 但是 eNB 1和 HeNB3意图建立直接的 X2连接。 X2 GW的 IP地址是配置给 HeNB的, 因 此 HeNB2和 HeNB3—开机上电后, 即可以新的注册消息来在 X2 GW中建立 和保存 RNL ID和 TNL地址的匹配关系。 同时, 当 X2 GW的 IP地址是配置 给 eNB的时候, eNB—开机上电后, 即可以新的注册消息来在 X2 GW中建 立和保存 RNL ID和 TNL地址的匹配关系。 eNB 1和 HeNB3之间是要建立直 接的 X2连接, 考虑到设计 X2 GW方案的时候要考虑到减少 TNL地址发现 过程数量的问题, 那么 HeNB3如何获取到 eNBl的 TNL地址, 从而有效地 减少 TNL地址发现过程的数量也是本专利要解决的问题。 发明内容
本发明实施例要解决的技术问题是提供一种 X2 消息通知的方法及家庭 基站、 X2网关, 以获知无法路由 X2建立请求消息到目标 eNB的原因, 或者 减少 TNL地址发现过程的数量。
为了解决上述技术问题, 釆用如下技术方案:
一种 X2消息通知的方法, 包括:
家庭基站接收 X2网关的 X2消息, 所述 X2消息携带用于表明无法路由 至目标基站的原因值;
所述家庭基站根据所述原因值发起传输网络层地址发现过程, 向所述
X2网关发送所述 X2网关所需要的信息, 或者所述家庭基站根据所述原因值 不发起 X2建立请求。
可选地, 所述原因值包括: 由于没有目标基站的无线网络层标识与传输 网络层地址的匹配关系而无法路由至目标基站;
所述家庭基站根据所述原因值发起传输网络层地址发现过程, 向所述 X2网关发送所述 X2网关所需要的信息的步骤包括:
所述家庭基站发起传输网络层地址发现过程, 获取所述目标基站的传输 网络层地址;
所述家庭基站向所述 X2网关发送 X2消息, 该 X2消息携带所述目标基 站的无线网络层标识和获取到的所述目标基站的传输网络层地址。
可选地, 所述原因值包括: 由于本家庭基站与目标基站不是连接在同一 个 X2网关而无法路由至目标基站;
所述家庭基站根据所述原因值不发起 X2建立请求的步骤包括: 所述家庭基站当再发现所述目标基站服务的小区并决定建立到所述目标 基站的间接 X2连接时, 不发起 X2建立请求。
可选地, 所述 X2消息包括 X2建立失败消息。 一种家庭基站, 包括接收模块和处理模块, 其中:
所述接收模块设置成: 接收 X2网关的 X2消息, 所述 X2消息携带用于 表明无法路由至目标基站的原因值;
所述处理模块设置成: 根据所述原因值发起传输网络层地址发现过程, 向所述 X2网关发送所述 X2网关所需要的信息, 或者不发起 X2建立请求。
可选地, 所述原因值包括: 由于没有目标基站的无线网络层标识与传输 网络层地址的匹配关系而无法路由至目标基站;
所述处理模块设置成按照如下方式根据所述原因值发起传输网络层地址 发现过程, 向所述 X2网关发送所述 X2网关所需要的信息: 发起传输网络层 地址发现过程, 获取所述目标基站的传输网络层地址; 向所述 X2 网关发送 X2消息, 该 X2消息携带所述目标基站的无线网络层标识和获取到的所述目 标基站的传输网络层地址。
可选地, 所述原因值包括: 由于本家庭基站与目标基站不是连接在同一 个 X2网关而无法路由至目标基站;
所述处理模块设置成按照如下方式根据所述原因值不发起 X2 建立请 求: 当再发现所述目标基站服务的小区并决定建立到所述目标基站的间接 X2连接时, 不发起 X2建立请求。
可选地, 所述接收模块接收的所述 X2消息包括 X2建立失败消息。
一种 X2消息通知的方法, 包括:
家庭基站向 X2网关发送第一 X2消息, 所述第一 X2消息携带返回目标 基站地址的指示信息;
所述 X2网关向所述家庭基站返回第二 X2消息, 所述第二 X2消息携带 所述 X2 网关保存的所述目标基站的传输网络层地址或不携带所述目标基站 的传输网络层地址;
所述家庭基站接收所述第二 X2消息, 所述家庭基站根据所述第二 X2消 息建立与所述目标基站的直接 X2连接或者发起传输网络层地址发现过程。 可选地, 当所述第二 X2消息携带所述 X2网关保存的所述目标基站的传 输网络层地址时, 所述家庭基站建立与所述目标基站的直接 X2 连接或者发 起传输网络层地址发现过程的步骤包括: 获得所述目标基站的传输网络层地 址后, 建立与所述目标基站的直接 X2连接;
当所述第二 X2 消息不携带所述目标基站的传输网络层地址时, 所述家 庭基站建立与所述目标基站的直接 X2 连接或者发起传输网络层地址发现过 程的步骤包括: 发起传输网络层地址发现过程, 获取所述目标基站的传输网 络层地址。
可选地, 所述第一 X2消息包括: X2建立请求消息,
所述第二 X2消息包括: X2建立失败消息。
一种家庭基站, 包括发送模块、 接收模块和处理模块, 其中:
所述发送模块设置成: 向 X2网关发送第一 X2消息, 所述第一 X2消息 携带返回目标宏基站地址的指示信息;
所述接收模块设置成: 接收所述 X2网关返回的第二 X2消息, 所述第二 X2消息携带所述 X2网关保存的所述目标宏基站的传输网络层地址或不携带 所述目标宏基站的传输网络层地址;
所述处理模块设置成: 根据所述第二 X2 消息建立与所述目标基站的直 接 X2连接或者发起传输网络层地址发现过程。
可选地, 所述处理模块设置成按照如下方式根据所述第二 X2 消息建立 与所述目标基站的直接 X2 连接或者发起传输网络层地址发现过程: 当所述 第二 X2消息携带所述 X2网关保存的所述目标基站的传输网络层地址时, 所 述家庭基站获得所述目标基站的传输网络层地址后, 建立与所述目标基站的 直接 X2连接; 当所述第二 X2 消息不携带所述目标基站的传输网络层地址 时, 所述家庭基站发起传输网络层地址发现过程, 获取所述目标基站的传输 网络层地址。
可选地, 所述第一 X2消息包括: X2建立请求消息, 所述第二 X2消息包括: X2建立失败消息。
一种 X2消息通知的方法, 包括:
X2网关接收家庭基站发送的 X2建立请求消息;
如所述家庭基站与目标基站的连接为直接 X2连接, 所述 X2网关向所述 家庭基站发送 X2消息, 所述 X2消息携带所述目标基站在所述 X2网关处注 册时间保存的传输网络层地址或携带直接连接的指示信息。
可选地, 所述 X2消息包括 X2建立失败消息。
一种 X2网关, 包括接收模块和发送模块, 其中:
所述接收模块设置成: 接收家庭基站发送的 X2建立请求消息; 所述发送模块设置成: 如所述家庭基站与目标基站的连接为直接 X2 连 接, 则向所述家庭基站返回 X2 消息, 所述 X2 消息携带所述宏基站在所述 X2网关处注册时间保存的传输网络层地址或携带直接连接的指示信息。
可选地, 所述 X2消息包括 X2建立失败消息。
上述技术方案的 X2消息通知的方法及家庭基站、 X2网关, 可以获知无 法路由 X2建立请求消息到目标 eNB的原因, 可以使 HeNB在发送给 X2 GW 的 X2消息中携带 eNB的 RNL ID和 TNL地址 , 使得 X2 GW保存 eNB的 RNL ID和 TNL地址的匹配关系 , 从而保证后续 X2建立请求消息正确路由到目标 eNB, 也可以避免大量不必要的 X2信令的开销, 或者减少 TNL地址发现过 程的数量。 附图概述
图 1为相关技术中的 HeNB所在的网络架构的示意图;
图 2为相关技术的 X2 GW部署的 E-UTRAN架构示意图;
图 3为本发明实施例的 HeNB结构示意图;
图 4为本发明实施例一的方法流程示意图; 图 5为本发明实施例二的方法流程示意图;
图 6为本发明实施例三的方法流程示意图;
图 7为本发明实施例的 HeNB结构示意图;
图 8为本发明实施例四的方法流程示意图;
图 9为本发明实施例的 X2 GW结构示意图。
本发明的较佳实施方式
下文中将结合附图对本发明的实施例进行详细说明。 需要说明的是, 在 不冲突的情况下, 本申请中的实施例及实施例中的特征可以相互任意组合。
本发明实施例提供了一种 X2消息通知的方法, 包括以下步骤: 步骤 11、 HeNB接收所述 X2 GW的 X2消息, 所述 X2消息携带用于表 明无法路由至目标 eNB或目标 HeNB的原因值;
步骤 12、 HeNB根据所述原因值发起传输网络层地址发现过程, 向所述 X2网关发送所述 X2网关所需要的信息, 或者所述 HeNB根据所述原因值不 发起 X2建立请求。
根据本发明实施例对应提供了一种 HeNB, 如图 3 所示, 本实施例的 HeNB包括
接收模块 301设置成: 接收 X2网关的 X2消息, 所述 X2消息携带用于 表明无法路由至目标基站的原因值;
处理模块 302设置成: 根据所述原因值发起传输网络层地址发现过程, 向所述 X2网关发送所述 X2网关所需要的信息, 或者不发起 X2建立请求。
在一可选实施例中 (对应实施例一) , 所述接收模块 301 , 接收到的 X2 消息携带的原因值包括: 由于没有目标基站的无线网络层标识与传输网络层 地址的匹配关系而无法路由至目标基站;
所述处理模块 302设置成按照如下方式根据所述原因值发起传输网络层 地址发现过程, 向所述 X2网关发送所述 X2网关所需要的信息: 发起传输网 络层地址发现过程, 获取所述目标基站的传输网络层地址; 向所述 X2 网关 发送 X2消息, 该 X2消息携带所述目标基站的无线网络层标识和获取到的所 述目标基站的传输网络层地址。
在一可选实施例中 (对应实施例二) , 所述接收模块 301 , 接收到的 X2 消息携带的原因值包括: 由于本家庭基站与目标基站不是连接在同一个 X2 网关而无法路由至目标基站;
所述处理模块 302设置成按照如下方式根据所述原因值不发起 X2建立 请求: 当发现所述目标基站服务的小区并决定建立到所述目标基站的间接 X2连接时, 不发起 X2建立请求。
本发明实施例的方法和 HeNB可以使 HeNB获知 X2 GW无法路由 X2建 立请求消息到目标 eNB的原因, 从而釆取相应的措施。
实施例一
在本实施例中 , eNB是通过 TNL地址发现的过程来获取 X2 GW的 TNL 地址的, X2 GW在接收到来自 HeNB的带有目标 eNB的 RNL ID的 X2建立 请求消息时 , 没有发现自身处存储了目标 eNB的 RNL ID和 TNL地址的匹配 关系, 因此无法路由 X2建立请求消息到目标 eNB。
X2 GW在发送给 HeNB的 X2消息中携带新的原因值, 例如 "匹配信息 不可用" 、 "不可知的目标地址" 、 "路由不被支持" 等, 使得源 HeNB端 获知 X2 GW是由于没有目标 eNB的 RNL ID和 TNL地址匹配关系而无法路 由 X2建立请求消息到目标 eNB端。 该 X2消息可以是 X2建立失败消息。
源 HeNB可在后续过程中将目标 eNB的 RNL ID和通过 TNL地址发现过 程获取的目标 eNB的 TNL地址发送给 X2 GW, 例如, 使 HeNB在发送给 X2 GW的 X2建立请求消息、 注册消息或者注册更新消息中携带 eNB的 RNL ID 和 TNL地址, 从而使得 X2 GW建立和 eNB的 SCTP ( STREAM CONTROL TRANSMISSION PROTOCOL, 流控制传输协议 )连接, 并使得 X2 GW保存 eNB的 RNL ID和 TNL地址的匹配关系 , 从而保证后续 X2建立请求消息正 确路由到目标 eNB。
图 4是本实施例的流程示意图, 如图 4所示, 包括以下步骤:
步骤 401: X2 GW的 IP地址是配置给 HeNB的, HeNB—开机上电后, 通过注册流程来在 X2 GW中建立和保存 RNL ID和 TNL地址的匹配关系。 步骤 402: HeNB发现 eNB服务的小区后, 决定要建立到 eNB的间接 X2 连接。
步骤 403: HeNB发送带有目标 eNB的 RNL ID的 X2建立请求消息给 X2 GW。
步骤 404: 此时 X2 GW处并没有保存 eNB的 RNL ID和 TNL地址的匹 配关系 , X2 GW无法路由 X2建立请求消息到目标 eNB, X2 GW返回 X2消 息给 HeNB , 在返回的 X2 消息中携带新的原因值, 例如 "匹配信息不可 用" 、 "不可知的目标地址" 、 "路由不被支持" 等, 来使得源 HeNB获知 X2 GW是由于没有目标 eNB的 RNL ID和 TNL地址匹配关系而无法路由 X2 建立请求消息到目标 eNB。 该 X2消息可以是 X2建立失败消息。
步骤 405: HeNB发起 TNL地址发现过程来获取 eNB的 TNL地址。 步骤 406: 源 HeNB通过步骤 404获知 X2 GW无法路由 X2建立请求消 息到目标 eNB后, 在发送给 X2 GW的 X2建立请求消息、 注册消息或者注册 更新消息中携带 eNB的 RNL ID和在步骤 405中获取的 eNB的 TNL地址。 X2 GW在获取到 eNB的 RNL ID和 TNL地址后 , 可以保存 eNB的 RNL ID 和 TNL地址的匹配关系 , 并建立 X2 GW和 eNB之间的 SCTP连接。
步骤 407: HeNB发送带有目标 eNB的 RNL ID的 X2建立请求消息给 X2 GW。 X2 GW才艮据存储的 eNB的 RNL ID和 TNL地址的匹配关系来将 X2 建立请求消息路由到相应的目标 eNB处。
步骤 408: eNB回复带有目标 HeNB的 RNL ID的 X2建立响应消息到 X2 GW, X2 GW才艮据存储的 HeNB的 RNL ID和 TNL地址的匹配关系来将 X2建立响应消息路由到相应的目标 HeNB处。
实施例二
当 HeNBl是注册在 X2 GW1上的, HeNB2或者 eNB2是注册在 X2 GW2 的, 在该场景下, HeNBl同 HeNB2或者 eNB2之间是不能通过 X2 GW1建 立间接的 X2接口的。
X2 GW在发送给 HeNB的 X2消息中携带新的原因值, 例如 "不在同一 个 X2 GW下" 等, 使得源 HeNB获知源 HeNB同新发现的 HeNB或者 eNB 不是连接在同一个 X2 GW上的。 该 X2消息可以是 X2建立失败消息。 源 HeNB后续可不再尝试建立到新发现的 HeNB或者 eNB的间接的 X2连接, 从而避免大量不必要的 X2信令的开销。
图 5是本实施例的流程示意图, 如图 5所示, 包括以下步骤:
步骤 501 : X2 GW1的 IP地址是配置给 HeNBl的, 开机上电后, 通过注 册流程来在 X2 GW1中建立和保存 HeNBl的 RNL ID和 TNL地址的匹配关 系。
步骤 502: X2 GW2的 IP地址是配置给 HeNB2或者 eNB2的, 开机上电 后, 通过注册流程来在 X2 GW2中建立和保存 HeNB2或者 eNB2的 RNL ID 和 TNL地址的匹配关系。
步骤 503 : HeNBl发现 HeNB2或者 eNB2服务的小区后, 决定要建立到 HeNB2或者 eNB2的间接 X2连接。
步骤 504: HeNBl发送带有目标 HeNB2或者 eNB2的 RNL ID的 X2建 立请求消息给 X2 GW1。
步骤 505: 由于 X2 GW1中没有 HeNB2的 RNL ID和 TNL地址的匹配关 系或者 eNB2的 RNL ID和 TNL地址的匹配关系 , X2 GW1返回 X2消息给 HeNBl , 可以在返回的 X2 消息中携带新的原因值, 例如 "不在同一个 X2 GW下" 等。 该 X2消息可以是 X2建立失败消息。
HeNBl收到带有特殊原因值的 X2消息后, 可以获知 HeNBl 同 HeNB2 或者 eNB2不是连接在同一个 X2 GW上的, 后续当 HeNBl再发现 HeNB2或 者 eNB2服务的小区, 并且决定要建立到 HeNB2或者 eNB2的间接 X2连接 时候, 可以避免再发起到 X2 GW1的 X2建立请求消息。
实施例三
在该实施例中 , 假设关于 eNB和 HeNB对、 HeNB和 HeNB对建立 X2 连接的方式(直接 X2连接或者间接 X2连接 )是保存在 HeNB处的。
当源 HeNB根据其保存的 X2连接方式决定建立到目标 eNB的直接 X2 连接的时候, 源 HeNB在发送给目标 eNB 的 X2 消息中携带请求返回目标 eNB的 TNL地址的指示信息, 该 X2消息可以是 X2建立请求消息。 X2 GW 接收到该 X2消息后 , 如果 X2 GW处已经有目标 eNB的 RNL ID和 TNL地 址的匹配关系 , X2 GW不根据存储的目标 eNB的 RNL ID和 TNL地址的匹 配关系来将该 X2 消息路由到相应的目标 eNB , 而是发送 X2 消息到源 HeNB , 并在该 X2消息中携带目标 eNB的 TNL地址 , 该 X2消息可以是 X2 建立失败消息, 从而使得后续源 HeNB直接发起到目标 eNB的直接 X2连接 的建立。
图 6是本实施例的流程示意图, 如图 6所示, 包括以下步骤:
步骤 601 : X2 GW的 IP地址是配置给 HeNB2的, HeNB2—开机上电 后, 通过注册流程来在 X2 GW中建立和保存 HeNB2的 RNL ID和 TNL地址 的匹配关系。
步骤 602: X2 GW的 IP地址是配置给 HeNB3的, HeNB3—开机上电 后 , 通过注册流程来在 X2 GW中建立和保存 HeNB3的 RNL ID和 TNL地址 的匹配关系。
步骤 603: 如果 X2 GW的 IP地址是配置给 eNB 1的, 那么 eNB 1一开机 上电后, 通过注册流程来在 X2 GW中建立和保存 eNBl的 RNL ID和 TNL 地址的匹配关系。 eNB 1也可以通过 TNL地址发现过程来获取 X2 GW的 TNL 地址, 即步骤 603省略, 那么在步骤 602之后 X2 GW中是没有 eNB 1的 RNL ID和 TNL地址匹配关系的。
步骤 604: HeNB3发现 eNBl服务的小区后, 根据 HeNB3处存储的 X2 连接的方式, 要建立到 eNBl的直接 X2连接。
步骤 605 : HeNB3发送带有目标 eNBl的 RNL ID的 X2消息给 X2 GW。 在该 X2消息中还携带了请求返回 eNB 1的 TNL地址的指示信息。 该 X2消息 可以是 X2建立请求消息。
步骤 606: 如果 X2 GW在步骤 603中保存了 eNB 1的 RNL ID和 TNL地 址匹配关系, 那么当 X2 GW接收到带有请求返回 eNBl的 TNL地址的指示 信息的 X2建立请求消息后, X2 GW不根据存储的 eNBl的 RNL ID和 TNL 地址的匹配关系来将 X2 建立请求消息路由到相应的目标 eNB 1 , 而是回复 X2消息给 HeNB3 , 该消息可以是 Χ2建立失败消息, 并将 eNBl在 X2 GW 处注册时保存的 TNL地址在该 X2消息中返回给 HeNB3。
如果步骤 603没有进行, X2 GW没有保存 eNBl的 RNL ID和 TNL地址 匹配关系, 那么当 X2 GW接收到带有请求返回 eNBl的 TNL地址的指示信 息的 X2建立请求消息后, 返回 X2消息给 HeNB3 , 该消息可以是 X2建立失 败消息, 该消息中没有携带 eNBl的 TNL地址信息。 HeNB3在接收到该消息 后, 可以发起 TNL地址发现过程来获取 eNB 1的 TNL地址。
步骤 607: HeNB3得到 eNBl的 TNL地址后, 建立与 eNBl的直接 X2 连接。
步骤 608: HeNB2发现 eNBl服务的小区后, 根据 HeNB2处存储的 X2 连接的方式, 要建立到 eNB 1的间接 X2连接。
步骤 609: HeNB2发送带有目标 eNBl的 RNL ID的 X2建立请求消息给 X2 GW, 如果 X2 GW处存储了 eNBl的 RNL ID和 TNL地址的匹配关系 , 那么 X2 GW根据存储的 eNBl的 RNL ID和 TNL地址的匹配关系来将 X2建 立请求消息路由到相应的目标 eNB 1。 eNB 1回复带有目标 HeNB2的 RNL ID 的 X2建立响应消息到 X2 GW, X2 GW根据存储的 HeNB2的 RNL ID和 TNL 地址的匹配关系来将 X2建立响应消息路由到相应的目标 HeNB2。
针对本实施例提供一种 HeNB, 如图 7所示, 包括:
发送模块 701设置成: 向 X2网关发送第一 X2消息, 所述第一 X2消息 携带返回目标宏基站地址的指示信息;
接收模块 702设置成: 接收所述 X2网关返回的第二 X2消息, 所述第二 X2消息携带所述 X2网关保存的所述目标宏基站的传输网络层地址或不携带 所述目标宏基站的传输网络层地址;
处理模块 703设置成: 根据所述第二 X2消息建立与所述目标基站的直 接 X2连接或者发起传输网络层地址发现过程。
其中, 所述处理模块 701设置成按照如下方式根据所述第二 X2消息向 所述 X2网关发送所述 X2 GW所需要的信息或者不发起 X2建立请求: 当所 述第二 X2消息携带所述 X2网关保存的所述目标基站的传输网络层地址时, 所述家庭基站获得所述目标基站的传输网络层地址后, 建立与所述目标基站 的直接 X2连接; 当所述第二 X2消息不携带所述目标基站的传输网络层地址 时, 所述家庭基站发起传输网络层地址发现过程, 获取所述目标基站的传输 网络层地址。
其中, 所述发送模块 701 , 发送的所述第一 X2消息包括: X2建立请求 消息,
所述接收模块 702 , 接收的所述第二 X2消息包括: X2建立失败消息。 实施例四
在该实施例中假设关于 eNB和 HeNB对、 HeNB和 HeNB对建立 X2连 接的方式(直接 X2连接或者间接 X2连接 )是保存在 X2 GW处的。
当 X2 GW接收到源 HeNB发送的 X2建立请求消息, 并根据其保存的 X2连接方式决定建立到目标 eNB的直接 X2连接的时候, 如果 X2 GW处已 经有目标 eNB的 RNL ID和 TNL地址的匹配关系 , X2 GW不根据存储的目 标 eNB的 RNL ID和 TNL地址的匹配关系来将该 X2消息路由到相应的目标 eNB , 而是发送 X2消息到源 HeNB , 并在该 X2消息中携带目标 eNB的 TNL 地址, 该 X2消息可以是 X2建立失败消息, 从而使得后续源 HeNB直接发起 到目标 eNB的直接 X2连接的建立。
当 X2 GW接收到源 HeNB发送的 X2建立请求消息, 并根据其保存的 X2连接方式决定建立到目标 eNB的直接 X2连接的时候, 如果 X2 GW处没 有目标 eNB的 RNL ID和 TNL地址的匹配关系 , X2 GW发送 X2消息到源 HeNB , 并在该 X2消息中携带直接连接的指示信息, 该消息可以是 X2建立 失败消息 , 从而使得后续源 HeNB发起 TNL地址发现过程来获取 eNB的 TNL 地址来建立到目标 eNB的直接 X2连接。
图 8是本实施例的流程示意图, 如图 8所示, 包括以下步骤:
步骤 801-步骤 803 : 与实施例二中步骤 301-步骤 303相同, 此处不再赘 述。
步骤 804: HeNB3发现 eNBl服务的小区。
步骤 805 : HeNB3发送带有目标 eNBl的 RNL ID的 X2建立请求消息给 X2 GW„
步骤 806 : X2 GW根据存储的 X2连接的方式, 判断 HeNB3和 eNB 1之 间要建立直接 X2连接。 如果 X2 GW在步骤 803中保存了 eNBl的 RNL ID 和 TNL地址匹配关系, 那么 X2 GW在接收到步骤 805的 X2建立请求消息 后 , 不根据存储的 eNBl的 RNL ID和 TNL地址的匹配关系来将 X2建立请求 消息路由到相应的目标 eNBl , 而是回复 X2消息给 HeNB3 , 该消息可以是 X2建立失败消息, 并将 eNBl在 X2 GW处注册时保存的 TNL地址在该 X2 消息中返回给 HeNB3。
X2 GW根据存储的 X2连接的方式, 判断 HeNB3和 eNBl之间要建立直 接 X2连接。 如果步骤 803没有进行, X2 GW没有保存 eNBl的 RNL ID和 TNL地址匹配关系, 那么当 X2 GW接收到步骤 805的 X2建立请求消息后, 返回 X2消息给 HeNB3 , 该消息可以是 X2建立失败消息。 X2 GW并在该 X2 消息中携带直接连接的指示信息。 HeNB3在接收到携带直接连接的指示信息 的 X2消息后 , 可以发起 TNL地址发现过程来获取 eNBl的 TNL地址。
步骤 807: 与实施例二中步骤 307相同, 此处不再赘述。
步骤 808: HeNB2发现 eNBl服务的小区。
步骤 809: HeNB2发送带有目标 eNBl的 RNL ID的 X2建立请求消息给 X2 GW, X2 GW根据存储的 X2连接的方式, 判断 HeNB2和 eNBl之间要建 立间接 X2连接。 如果 X2 GW处存储了 eNB 1的 RNL ID和 TNL地址的匹配 关系, 那么 X2 GW根据存储的 eNB 1的 RNL ID和 TNL地址的匹配关系来将 X2建立请求消息路由到相应的目标 eNBl。 eNBl 回复带有目标 HeNB2 的 RNL ID的 X2建立响应消息到 X2 GW, X2 GW才艮据存储的 HeNB2的 RNL ID 和 TNL地址的匹配关系来将 X2建立响应消息路由到相应的目标 HeNB2。
针对本实施例提供一种 X2 GW, 如图 9所示, 包括:
接收模块 901设置成: 接收家庭基站发送的 X2建立请求消息; 发送模块 902设置成: 如所述家庭基站与目标宏基站的连接为直接 X2 连接, 则向所述家庭基站返回 X2消息, 所述 X2消息携带所述宏基站在所述 X2网关处注册时间保存的传输网络层地址或携带直接连接的指示信息。 其中, 所述发送模块 902, 发送的所述 X2消息可以包括 X2建立失败消 息。
以上仅为本发明的可选实施案例而已, 并不用于限制本发明, 本发明还 可有其他多种实施例, 在不背离本发明精神及其实质的情况下, 熟悉本领域 的技术人员可根据本发明做出各种相应的改变和变形, 但这些相应的改变和 变形都应属于本发明所附的权利要求的保护范围。
显然, 本领域的技术人员应该明白, 上述的本发明的各模块或各步骤可 以用通用的计算装置来实现, 它们可以集中在单个的计算装置上, 或者分布 在多个计算装置所组成的网络上, 可选地, 它们可以用计算装置可执行的程 序代码来实现, 从而, 可以将它们存储在存储装置中由计算装置来执行, 并 且在某些情况下, 可以以不同于此处的顺序执行所示出或描述的步骤, 或者 将它们分别制作成各个集成电路模块, 或者将它们中的多个模块或步骤制作 成单个集成电路模块来实现。 这样, 本发明不限制于任何特定的硬件和软件 结合。
工业实用性 上述技术方案的 X2消息通知的方法及家庭基站、 X2网关, 可以获知无 法路由 X2建立请求消息到目标 eNB的原因, 可以使 HeNB在发送给 X2 GW 的 X2消息中携带 eNB的 RNL ID和 TNL地址 , 使得 X2 GW保存 eNB的 RNL ID和 TNL地址的匹配关系 , 从而保证后续 X2建立请求消息正确路由到目标 eNB, 也可以避免大量不必要的 X2信令的开销, 或者减少 TNL地址发现过 程的数量。 因此本发明具有很强的工业实用性。

Claims

权 利 要 求 书
1、 一种 X2消息通知的方法, 包括:
家庭基站接收 X2网关的 X2消息, 所述 X2消息携带用于表明无法路由 至目标基站的原因值;
所述家庭基站根据所述原因值发起传输网络层地址发现过程, 向所述
X2网关发送所述 X2网关所需要的信息, 或者所述家庭基站根据所述原因值 不发起 X2建立请求。
2、 如权利要求 1所述的 X2消息通知的方法, 其中:
所述原因值包括: 由于没有目标基站的无线网络层标识与传输网络层地 址的匹配关系而无法路由至目标基站;
所述家庭基站根据所述原因值发起传输网络层地址发现过程, 向所述
X2网关发送所述 X2网关所需要的信息的步骤包括:
所述家庭基站发起传输网络层地址发现过程, 获取所述目标基站的传输 网络层地址;
所述家庭基站向所述 X2网关发送 X2消息, 该 X2消息携带所述目标基 站的无线网络层标识和获取到的所述目标基站的传输网络层地址。
3、 如权利要求 1所述的 X2消息通知的方法, 其中:
所述原因值包括: 由于本家庭基站与目标基站不是连接在同一个 X2 网 关而无法路由至目标基站;
所述家庭基站根据所述原因值不发起 X2建立请求的步骤包括: 所述家庭基站当再发现所述目标基站服务的小区并决定建立到所述目标 基站的间接 X2连接时, 不发起 X2建立请求。
4、 如权利要求 1所述的 X2消息通知的方法, 其中:
所述 X2消息包括 X2建立失败消息。
5、 一种家庭基站, 包括接收模块和处理模块, 其中:
所述接收模块设置成: 接收 X2网关的 X2消息, 所述 X2消息携带用于 表明无法路由至目标基站的原因值; 所述处理模块设置成: 根据所述原因值发起传输网络层地址发现过程, 向所述 X2网关发送所述 X2网关所需要的信息, 或者不发起 X2建立请求。
6、 如权利要求 5所述的家庭基站, 其中:
所述原因值包括: 由于没有目标基站的无线网络层标识与传输网络层地 址的匹配关系而无法路由至目标基站;
所述处理模块设置成按照如下方式根据所述原因值发起传输网络层地址 发现过程, 向所述 X2网关发送所述 X2网关所需要的信息: 发起传输网络层 地址发现过程, 获取所述目标基站的传输网络层地址; 向所述 X2 网关发送 X2消息, 该 X2消息携带所述目标基站的无线网络层标识和获取到的所述目 标基站的传输网络层地址。
7、 如权利要求 5所述的家庭基站, 其中:
所述原因值包括: 由于本家庭基站与目标基站不是连接在同一个 X2 网 关而无法路由至目标基站;
所述处理模块设置成按照如下方式根据所述原因值不发起 X2 建立请 求: 当再发现所述目标基站服务的小区并决定建立到所述目标基站的间接 X2连接时, 不发起 X2建立请求。
8、 如权利要求 5所述的家庭基站, 其中:
所述接收模块接收的所述 X2消息包括 X2建立失败消息。
9、 一种 X2消息通知的方法, 包括:
家庭基站向 X2网关发送第一 X2消息, 所述第一 X2消息携带返回目标 基站地址的指示信息;
所述 X2网关向所述家庭基站返回第二 X2消息, 所述第二 X2消息携带 所述 X2 网关保存的所述目标基站的传输网络层地址或不携带所述目标基站 的传输网络层地址;
所述家庭基站接收所述第二 X2消息, 所述家庭基站根据所述第二 X2消 息建立与所述目标基站的直接 X2连接或者发起传输网络层地址发现过程。
10、 如权利要求 9所述的 X2消息通知的方法, 其中: 当所述第二 X2消息携带所述 X2网关保存的所述目标基站的传输网络层 地址时, 所述家庭基站建立与所述目标基站的直接 X2 连接或者发起传输网 络层地址发现过程的步骤包括: 获得所述目标基站的传输网络层地址后, 建 立与所述目标基站的直接 X2连接;
当所述第二 X2 消息不携带所述目标基站的传输网络层地址时, 所述家 庭基站建立与所述目标基站的直接 X2 连接或者发起传输网络层地址发现过 程的步骤包括: 发起传输网络层地址发现过程, 获取所述目标基站的传输网 络层地址。
11、 如权利要求 9或 10所述的 X2消息通知的方法, 其中:
所述第一 X2消息包括: X2建立请求消息,
所述第二 X2消息包括: X2建立失败消息。
12、 一种家庭基站, 包括发送模块、 接收模块和处理模块, 其中: 所述发送模块设置成: 向 X2网关发送第一 X2消息, 所述第一 X2消息 携带返回目标宏基站地址的指示信息;
所述接收模块设置成: 接收所述 X2网关返回的第二 X2消息, 所述第二
X2消息携带所述 X2网关保存的所述目标宏基站的传输网络层地址或不携带 所述目标宏基站的传输网络层地址;
所述处理模块设置成: 根据所述第二 X2 消息建立与所述目标基站的直 接 X2连接或者发起传输网络层地址发现过程。
13、 如权利要求 12所述的家庭基站, 其中:
所述处理模块设置成按照如下方式根据所述第二 X2 消息建立与所述目 标基站的直接 X2连接或者发起传输网络层地址发现过程: 当所述第二 X2消 息携带所述 X2 网关保存的所述目标基站的传输网络层地址时, 所述家庭基 站获得所述目标基站的传输网络层地址后, 建立与所述目标基站的直接 X2 连接; 当所述第二 X2 消息不携带所述目标基站的传输网络层地址时, 所述 家庭基站发起传输网络层地址发现过程, 获取所述目标基站的传输网络层地 址。
14、 如权利要求 12或 13所述的家庭基站, 其中: 所述第一 X2消息包括: X2建立请求消息,
所述第二 X2消息包括: X2建立失败消息。
15、 一种 X2消息通知的方法, 包括:
X2网关接收家庭基站发送的 X2建立请求消息;
如所述家庭基站与目标基站的连接为直接 X2连接, 所述 X2网关向所述 家庭基站发送 X2消息, 所述 X2消息携带所述目标基站在所述 X2网关处注 册时间保存的传输网络层地址或携带直接连接的指示信息。
16、 如权利要求 15所述的 X2消息通知的方法, 其中:
所述 X2消息包括 X2建立失败消息。
17、 一种 X2网关, 包括接收模块和发送模块, 其中:
所述接收模块设置成: 接收家庭基站发送的 X2建立请求消息; 所述发送模块设置成: 如所述家庭基站与目标基站的连接为直接 X2 连 接, 则向所述家庭基站返回 X2 消息, 所述 X2 消息携带所述宏基站在所述 X2网关处注册时间保存的传输网络层地址或携带直接连接的指示信息。
18、 如权利要求 17所述的 X2网关, 其中:
所述 X2消息包括 X2建立失败消息。
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