WO2012097708A1 - 一种lipa连接切换准备过程的执行方法及装置 - Google Patents

一种lipa连接切换准备过程的执行方法及装置 Download PDF

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Publication number
WO2012097708A1
WO2012097708A1 PCT/CN2012/070337 CN2012070337W WO2012097708A1 WO 2012097708 A1 WO2012097708 A1 WO 2012097708A1 CN 2012070337 W CN2012070337 W CN 2012070337W WO 2012097708 A1 WO2012097708 A1 WO 2012097708A1
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WIPO (PCT)
Prior art keywords
lipa connection
handover
base station
user equipment
preparation process
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Application number
PCT/CN2012/070337
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English (en)
French (fr)
Inventor
田野
张娟
Original Assignee
大唐移动通信设备有限公司
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Publication of WO2012097708A1 publication Critical patent/WO2012097708A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0011Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0016Hand-off preparation specially adapted for end-to-end data sessions

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a local IP access (LIP) connection handover preparation process and apparatus.
  • LIP local IP access
  • LIPA is a technology that allows a User Equipment (UE) to access a local network associated with the Home Base Station through a home base station, including a home network, a corporate network, and the like.
  • the user equipment accesses the local network through a local gateway (LGW).
  • LGW local gateway
  • the local gateway and the home base station (H(e)B) are implemented on the same physical entity.
  • the local gateway can be implemented on a different physical entity from the home base station.
  • each home base station supports a Closed Subscriber Group (CSG) cell, which provides communication services for users belonging to the closed subscriber group.
  • CSG Closed Subscriber Group
  • the network needs to perform access control on the user equipment that accesses the home base station and the local network, including:
  • the home base station access control determines whether the user equipment has the right to access the network through a certain home base station (CSG cell);
  • Local network access control that is, determining whether the user equipment has the right to request access to a specific local network through a certain home base station (CSG cell). Local network access control is performed on the basis of successful home base station access control.
  • the core network management control entity performs access control of the home base station and access control of the local network based on the subscription information of the user equipment.
  • the 3GPP Rel-10 version does not support the mobility of the LIPA connection.
  • the connection needs to be activated before initiating the handover for the user equipment.
  • the current solution of the 3GPP Rel-10 standard is: The home base station notifies the local gateway user equipment to initiate the LIPA connection handover through the internal interface before performing the LIPA connection handover, and then the local gateway initiates the connection deactivation process. , release the established LIPA connection. After the LIPA connection is deactivated, the home base station initiates a handover procedure for the user equipment.
  • the home base station notifies the core network management control entity before the LIPA connection handover, and the core network management control entity initiates the LIPA connection deactivation, and then goes to the home base station. The response message is returned, and the home base station then initiates the LIPA connection handover procedure.
  • LTE Long Term Evolution
  • MME Mobility Management Entity
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • Step 1 When the LIPA connection handover is about to occur, if the user equipment has a LIPA connection, the home base station sends an E-UTRAN Local Connection Handover Indication (E-UTRAN Local Connection Handover Indication) to the MME, indicating that the LIPA connection is about to occur at this time.
  • E-UTRAN Local Connection Handover Indication E-UTRAN Local Connection Handover Indication
  • the target identifier (Target ID) carried in the message indicates the identifier of the target base station for the LIPA connection handover;
  • Step 2 If the LIPA connection is not the last IP connection of the user equipment, the MME initiates the MME requested PDN disconnection process to release the LIPA connection; otherwise, the detach procedure is initiated;
  • the MME After the step 3 and the step 2 are performed, the MME returns an E-UTRAN Local Connection Handover ACK message to the home base station, indicating that the LIPA connection is released, that is, the LIPA connection deactivation process is completed, and Perform a LIPA connection switch. The home base station will then initiate a LIPA connection switch based on the existing process.
  • 3GPP TS 36.413 defines the handover preparation procedure for the LTE system.
  • the source evolved base station eNodeB
  • eNodeB when the source evolved base station (eNodeB) needs to initiate a LIPA connection handover procedure for the user equipment, it initiates a handover preparation process by sending a Handover Required message to the MME that provides the service for the user equipment, thereby The network requests the target side cell to reserve resources for the user equipment. After the handover preparation process is successfully completed, the MME responds to the source eNodeB using a Handover Command message.
  • the Handover Required message includes the target base station identifier selected by the source eNodeB, that is, the target ID.
  • the message will also include the CSG ID information of the selected target base station.
  • the MME will return a handover preparation failure (Handover Preparation Failure) message to the source eNodeB, where the handover preparation is carried.
  • the cause of the failure of the process is carried.
  • the LIPA connection in the home base station cell does not support the mobility of the user equipment, that is, the network needs to initiate a handover for the user equipment. First activate the LIPA connection that the user device has established.
  • 3GPP Release 11 In the (Rel-11) phase, it is proposed that the network should support the mobility of the LIPA connection, that is, the network can switch the established LIPA connection for the mobile user equipment as long as certain access control conditions are met.
  • 3GPP Rel-11 also requires a newly introduced home base station system to maintain compatibility with the original network.
  • technical solutions capable of satisfying the above needs have not been proposed in the prior art.
  • the LIPA communication function of the home base station cell needs to support the mobility of the user equipment in the local gateway (Intra-LGW), that is, when the user equipment is connected to the same LGW.
  • the system should be able to perform LIPA connection switching for it, thereby ensuring the continuity of the LIPA data connection of the user equipment.
  • the LIPA connection established by the user equipment will connect to the deactivation process through a packet data network (PDN) separately introduced before the handover process. freed.
  • PDN packet data network
  • the embodiment of the invention provides a method and a device for performing a LIPA connection handover preparation process, which are used to implement a LIPA connection handover preparation process for supporting LIPA connection handover, thereby satisfying the 3GPP Rel-11 phase system and supporting the user equipment to establish an LIPA connection.
  • the source home base station determines that the user equipment needs to perform LIPA connection switching
  • the source home base station determines the type of the target base station cell for the LIPA connection handover
  • the source home base station performs a LIPA connection handover preparation process of the user equipment according to the type of the target base station cell that the LIPA connection switches.
  • the core network management control entity determines a type of the target base station cell according to the request handover message sent by the source home base station;
  • the core network management control entity performs a handover preparation process according to the type of the target base station cell.
  • a handover determining unit configured to determine that the user equipment needs to perform a LIPA connection switch
  • a type determining unit configured to determine a type of a target base station cell of the LIPA connection handover
  • the handover preparation process execution unit is configured to perform a LIPA connection handover preparation process of the user equipment according to the type of the target base station cell of the LIPA connection handover.
  • a type determining unit configured to determine a type of the target base station cell according to the request handover message sent by the source home base station
  • a handover preparation process execution unit configured to perform a handover preparation process for the user equipment according to the type of the target base station cell.
  • the source home base station performs the LIPA connection handover preparation process of the user equipment that needs to be switched according to the type of the target base station cell that is switched by the LIPA connection, thereby implementing the LIPA connection handover preparation process supporting the LIPA connection handover, which is good.
  • the 3GPP Rel l l phase system should satisfy the requirement that the user equipment has established LIPA connection switching, and realize the mobility of the user equipment in the local gateway.
  • FIG. 1 is a schematic diagram of a LIPA connection deactivation process triggered by a home base station in a 3GPP Rel-10 handover process in the background art
  • FIG. 3 is a schematic flowchart of a failure of a handover preparation process in the background art
  • FIG. 4 is a schematic flowchart of a method for performing a LIPA connection handover preparation process according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a source H(e) B required to switch a user equipment LIPA connection to a new base station according to an embodiment of the present invention
  • a schematic diagram of the processing flow before the LIPA connection switching preparation process is initiated;
  • FIG. 6 is a schematic flowchart of a core network management control entity determining whether a user equipment establishes a LIPA connection according to an embodiment of the present disclosure
  • FIG. 7 is a schematic diagram of a core network management control entity (Serving General Packet Radio Service (GPRS) support node (Serving GPRS Support) after receiving a request handover message sent by a source H(e)B according to an embodiment of the present invention.
  • GPRS General Packet Radio Service
  • FIG. 7 Schematic diagram of the processing flow of Node, SGSN), or MME;
  • FIG. 8 is a schematic flowchart of a process according to Embodiment 1 of the present disclosure.
  • FIG. 9 is a schematic flowchart of a process according to Embodiment 2 of the present disclosure.
  • FIG. 10 is a schematic flowchart of a process of Embodiment 3 according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic flowchart of a process according to Embodiment 4 of the present disclosure.
  • FIG. 12 is a schematic diagram of an apparatus for performing a LIPA connection handover preparation process according to an embodiment of the present invention
  • FIG. 13 is a schematic diagram of an apparatus for performing a LIPA connection handover preparation process according to an embodiment of the present invention.
  • the embodiment of the present invention provides a LIPA connection handover preparation processing scheme for supporting LIPA connection handover, where the user equipment moves when the LIPA connection is established in the home base station cell range.
  • the source home base station initiates a LIPA connection handover preparation process to the core network management control entity (for example, the SGSN or the MME, etc.) according to the target base station cell type to which the user equipment is to be switched.
  • the core network management control entity for example, the SGSN or the MME, etc.
  • the core network management control entity After receiving the request handover message sent by the home base station, the core network management control entity determines, according to the received or locally stored information, whether the selected target cell can continue to maintain the established LIPA connection for the user equipment. If the LIPA connection cannot be maintained, the core network management control entity first performs the LIPA connection deactivation process, and then returns a handover preparation failure message to the source home base station, and instructs it to re-initiate the handover preparation process by the cause value. If LIPA If it can be maintained, the core network management control entity continues to perform the handover preparation process.
  • a method for performing a LIPA connection switching preparation process includes the following steps:
  • the source home base station determines that the user equipment needs to perform a LIPA connection switch.
  • the source home base station determines a type of a target base station cell that is connected by the LIPA connection.
  • the source home base station performs a LIPA connection handover preparation process of the user equipment according to the type of the target base station cell that is switched by the LIPA connection.
  • the source home base station performs a LIPA connection handover preparation process corresponding to the user equipment according to the type of the target base station cell of the LIPA connection handover, including:
  • the source home base station triggers the LGW to initiate a LIPA connection deactivation process by sending a notification message to the local gateway LGW.
  • the source home base station When the source home base station determines that the LIPA connection deactivation process is completed, the source home base station initiates a handover preparation process by transmitting a request handover message to the core network management control entity.
  • the source home base station performs a LIPA connection handover preparation process corresponding to the user equipment according to the type of the target base station cell of the LIPA connection handover, including:
  • the source home base station initiates a handover preparation process by sending a request handover message to the core network management control entity.
  • the request handover message includes information for indicating to the core network management control entity whether the user equipment that needs to perform handover between the base stations establishes a LIPA connection.
  • the source home base station when the source home base station receives the Packet Data Protocol (PDP) context deactivation operation command sent by the core network management control entity for the LIPA connection, or the evolved packet system (Evolved) When the Packet System, EPS) bears the deactivation operation command, the source home base station deactivates the LIPA connection and returns a response message to the core network management control entity.
  • PDP Packet Data Protocol
  • Evolved evolved packet system
  • the source home base station when the source home base station receives the handover preparation failure message sent by the core network management control entity, and the reason value carried therein is to deactivate the established LIPA connection, the source home base station completes the deactivation operation of the LIPA connection. Thereafter, the handover preparation process is initiated again by resending the request handover message to the core network management control entity.
  • the main processing flow before the LIPA connection handover preparation process including the following steps:
  • Source H0 B determines that the user equipment moves, and the user equipment needs to be switched to a new base station (target base station).
  • the source H(e) B determines whether the target base station cell selected by the source H(e) B is a macro base station cell, and if yes, Then step S203 is performed; otherwise, step S206 is performed.
  • the source H(e) B determines whether the user equipment is established with the LIPA connection. If yes, step S204 is performed; otherwise, step S206 is performed.
  • the source H(e)B notifies the LGW to activate the established LIPA connection.
  • source ⁇ (» ⁇ determines the completion of the LIPA connection deactivation process.
  • the source H(e) B initiates a handover preparation process.
  • step S202 needs to determine what type of target base station cell the target base station is, and performs subsequent processing based on the following, which specifically includes the following two situations:
  • the target base station cell selected by the source H(e) B is a macro base station cell (eg, a NodeB cell, an eNodeB cell, etc.), then the source H(e) B passes the internal interface between the H(e)NB and the LGW. (When H(e)NB and LGW are in the same entity), or through the external interface between H(e)B and LGW, send a notification message to LGW to trigger LGW to initiate LIPA connection deactivation process, release established The LIPA connection, then, after confirming that the LIPA connection is deactivated, initiates a handover preparation process.
  • a macro base station cell eg, a NodeB cell, an eNodeB cell, etc.
  • Case B If the selected target base station cell is a CSG cell (where the base station is H(e) B ), the source H(e) B sends a request handover message to the core network management control entity, thereby initiating a handover preparation process.
  • the source H(e) B After confirming that the LIPA connection is deactivated, the source H(e) B sends a request handover message to the core network management control entity, thereby initiating a handover preparation process.
  • the method for confirming that the LIPA connection is deactivated may be that the source H(e) B receives the packet data protocol context deactivation operation instruction or the evolved packet system bearer deactivation operation instruction sent by the core network management control entity for the LIPA connection. It can also be a LIPA connection deactivation response message received by the LGW, etc.
  • the source H(e) B may add an information element (for example, a local connection indication) in the request handover message, and is used to indicate to the core network management control entity whether the user equipment that needs to perform handover between the base stations is Established a LIPA connection.
  • an information element for example, a local connection indication
  • the source H(e) B when the source H(e) B receives the PDP context deactivation operation instruction or the EPS bearer deactivation operation instruction for the LIPA connection sent by the core network management control entity, the source H(e) B deactivates the LIPA connection and returns a corresponding response message to the core network management control entity.
  • the PDP context deactivation operation instruction for the LIPA connection may be: Deactivate PDP Context Request message;
  • the EPS deactivates the operation command, which can be: Deactivate Bearer Request message.
  • a method for performing a LIPA connection handover preparation process includes:
  • Step 1 The core network management control entity determines a type of the target base station small area according to the request handover message sent by the source home base station;
  • Step 2 The core network management control entity performs a handover preparation process according to the type of the target base station cell.
  • the core network management control entity performs a handover preparation process according to the type of the target base station cell, including:
  • the core network management control entity continues to perform the handover preparation process in accordance with the provisions of the 3GPP TS 23.401 protocol.
  • the core network management control entity performs a handover preparation process according to the type of the target base station cell, including:
  • the core network management control entity determines whether the user equipment that needs to perform the cell handover between the base stations establishes the LIPA connection. When the user equipment does not establish the LIPA connection, the core network management control entity continues to perform the handover preparation of the user equipment according to the 3GPP TS 23.401 protocol. Process
  • the core network management control entity determines whether the target CSG cell can maintain the established LIPA connection
  • the core network management control entity continues to perform the LIPA connection handover preparation process of the user equipment according to the 3GPP TS 23.401 protocol.
  • the core network management control entity determines whether the established LIPA connection is the only packet data network PDN connection of the user equipment, and if so, the core network management control The entity detaches the user equipment; otherwise, the core network management control entity deactivates the established LIPA connection and returns a handover preparation failure message and a cause value to the source home base station.
  • the core network management control entity determines whether the user equipment that needs to perform cell handover between the base stations establishes a LIPA connection, including:
  • the core network management control entity determines whether the user equipment carried in the request handover message sent by the source home base station is used to indicate whether the user equipment that needs to perform handover between the base stations establishes the LIPA connection information, and if yes, determines that the base station needs to be performed according to the information. Whether the user equipment of the inter-cell handover is established with the LIPA connection; otherwise, the user equipment context information of the local maintenance is queried, and whether the user equipment that needs to perform cell handover between the base stations establishes a LIPA connection according to the user equipment context information.
  • the core network management control entity in the embodiment of the present invention is an SGSN or an MME.
  • the core network management control entity after receiving the request handover message sent by the source H(e)B, the core network management control entity first determines the target according to the Target ID and the CSG ID information in the message. The type of base station cell. If the target base station cell is a macro base station cell, then the core network management control entity follows 3GPP TS 23.401 The process specified in the protocol is processed, that is, the handover preparation process is continued. If the target base station cell is a CSG cell, after the core network management control entity performs the home base station access control, it should first determine whether the user equipment has established a LIPA connection.
  • the core network management control entity determines whether the user equipment establishes a LIPA connection process, including the following steps:
  • the core network management control entity determines that it is required to perform an operation of determining whether the user equipment establishes a LIPA connection.
  • the core network management control entity determines whether the local switch indication is included in the request handover message sent by the H(e) B. If yes, step S303 is performed; otherwise, step S306 is performed.
  • step S303 The core network management control entity determines whether the "local connection indication" indicates that the user equipment has established the LIPA connection. If yes, step S304 is performed; otherwise, step S305 is performed.
  • the core network management control entity determines that the user equipment establishes a LIPA connection.
  • the core network management control entity determines that the user equipment does not establish a LIPA connection.
  • the core network management control entity may determine whether the user equipment indicates that the LIPA connection is established by using the locally maintained user equipment context information. If yes, step S304 is performed; otherwise, step S305 is performed.
  • the core network management control entity processes according to the procedure specified in the 3GPP TS 23.401 protocol, that is, continues to perform the LIPA connection switching preparation process. Otherwise, the core network management control entity initiates local network access control for the LIPA connection of the user equipment.
  • the core network management control entity starts the main processing process starting from the request handover message sent by the source H(e)B, and includes the following steps:
  • the core network management control entity receives the request handover message sent by the source H(e)B.
  • step S402. The core network management control entity determines whether the target cell is a CSG cell. If yes, step S403 is performed; otherwise, step S410 is performed.
  • the core network management control entity determines whether the target CSG cell allows the user equipment to access the target CSG cell. If yes, step S404 is performed; otherwise, step S410 is performed.
  • the core network management control entity determines whether the user equipment establishes a LIPA connection, and if yes, performs step S405; otherwise, performs step S410.
  • the core network management and control entity resides in the user subscription information, or other conditions (eg, network operator configuration, network topology, etc.), and determines whether the established LIPA connection can be maintained for the user equipment in the target CSG cell. If yes, go to step S410; otherwise, go to step S406.
  • the core network management control entity determines whether the LIPA connection to be deactivated is a PDN connection established by the user equipment. If yes, step S408 is performed; otherwise, step S407 is performed.
  • the core network management control entity initiates a LIPA connection deactivation process (the PDP context initiated by the SGSN)
  • the SGSN-initiated PDP Context Deactivation procedure or the MME requested PDN disconnection procedure is used to deactivate the established LIPA connection.
  • the core network management control entity initiates a detach procedure (either SGSN-initiated Detach procedure or MME-initiated Detach procedure) to deactivate the user equipment and terminate Switching process.
  • a detach procedure either SGSN-initiated Detach procedure or MME-initiated Detach procedure
  • the core network management control entity After the LIPA connection is deactivated, the core network management control entity sends a handover preparation failure message to the source H(e)B, wherein the reason value indicates that the failure is caused by: deactivating the established (LIPA) PDN connection.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the user equipment that has established the LIPA connection needs to connect from the source CSG cell LIPA to switch to a cell within the coverage of the target macro base station.
  • H(e) B sends a notification message to the LGW to trigger the LGW to deactivate the established LIPA connection.
  • GGSN gateway GPRS support node
  • bearer deactivation process initiated by the PGW.
  • H(e) B receives the response message sent by the LGW.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • H(e) B sends a request handover message to the core network management control entity to initiate a handover preparation process.
  • the core network management control entity determines that the target cell is a CSG cell, and the target cell can maintain the established LIPA connection for the user equipment.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • H(e) B sends a request handover message to the core network management control entity to initiate a handover preparation process.
  • the core network management control entity determines that the target cell is a CSG cell, but the target cell cannot maintain the established LIPA connection for the user equipment.
  • the core network management control entity determines that the established LIPA connection is not a unique PDN connection of the user equipment.
  • the core network management control entity deactivates the established LIPA connection, that is, performs a PDP context deactivation process initiated by the SGSN or a PDN connection requested by the MME to activate the process.
  • the core network management control entity sends a handover preparation failure message to H(e)B, where the failure cause value is “deactivate the established LIPA connection”.
  • H(e)B After receiving the handover preparation failure message with the cause value, H(e)B sends a request handover message to the core network management control entity to initiate the handover preparation process again.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • H(e)B sends a request handover message to the core network management control entity to initiate a handover preparation process.
  • the core network management control entity determines that the target cell is a CSG cell, but the target cell cannot maintain the established LIPA connection for the user equipment.
  • the core network management control entity determines that the established LIPA connection is a unique PDN connection of the user equipment. S804. Perform a detachment process initiated by the SGSN or a detachment process initiated by the MME. That is, in the handover preparation phase, the core network management control entity deactivates the user equipment after determining that the user equipment cannot access the local network.
  • the implementation of the LIPA connection switching preparation process is also provided in the embodiment of the present invention.
  • the implementation of the LIPA connection switching preparation process is similar to the implementation method of the LIPA connection switching preparation process in the embodiment of the present invention. See the implementation of the method, and the repetition will not be repeated.
  • an apparatus for performing a LIPA connection switching preparation process includes: a handover determining unit 101, configured to determine that a user equipment needs to perform a LIPA connection handover;
  • a type determining unit 102 configured to determine a type of a target base station cell of the LIPA connection handover
  • the handover preparation process execution unit 103 is configured to perform a LIPA connection handover preparation process of the user equipment according to the type of the target base station cell of the LIPA connection handover.
  • the handover preparation process execution unit 103 includes:
  • the trigger deactivation unit is configured to trigger the LGW to initiate a LIPA connection deactivation process by sending a notification message to the local gateway LGW;
  • the initiating unit is configured to initiate a handover preparation process by sending a request handover message to the core network management control entity when it is determined that the LIPA connection deactivation process is completed.
  • the handover preparation process execution unit 103 initiates a handover preparation process by transmitting a request handover message to the core network management control entity.
  • the handover preparation process execution unit 103 in the request handover message sent, includes information for indicating to the core network management control entity whether the user equipment that needs to perform cell handover between the base stations establishes a LIPA connection.
  • the device further comprises:
  • Deactivation processing unit configured to receive, when receiving the core network management control entity, during handover preparation
  • the LIPA-connected packet data protocol PDP context deactivates the operation command, or the evolved packet system EPS bearer deactivates the operation command, deactivates the LIPA connection, and returns a response message to the core network management control entity.
  • the deactivation processing unit when receiving the handover preparation failure message sent by the core network management control entity, and the reason value carried therein indicates that the established LIPA connection is deactivated, after performing the deactivation operation of the LIPA connection The handover preparation process is initiated again by resending the request handover message to the core network management control entity.
  • the device is a base station.
  • an apparatus for performing a LIPA connection handover preparation process includes: a type determining unit 201, configured to determine a type of a target base station cell according to a request handover message sent by a source home base station;
  • the handover preparation process execution unit 202 is configured to perform a handover preparation process according to the type of the target base station cell.
  • the target base station cell determined by the type determining unit 201 is a macro base station cell
  • the handover preparation process execution unit 202 continues to perform the handover preparation process in accordance with the 3GPP TS 23.401 protocol.
  • the target base station cell determined by the type determining unit 201 is a CSG cell
  • the handover preparation process execution unit 202 includes:
  • the first determining unit 301 is configured to determine whether a user equipment that needs to perform cell handover between the base stations establishes a LIPA connection;
  • the continuation execution unit 302 is configured to continue to perform the handover preparation process of the user equipment according to the 3GPP TS 23.401 protocol when the user equipment does not establish a LIPA connection;
  • the second determining unit 303 is configured to: when the user equipment establishes the LIPA connection, determine whether the target CSG cell can maintain the established LIPA connection; when the target CSG cell can maintain the established LIPA connection, trigger the continuation execution unit 302 according to the 3GPP.
  • the TS 23.401 protocol stipulates that the handover preparation process of the user equipment is continued.
  • the handover preparation process execution unit 202 further includes: The third determining unit 304 is configured to: when the target CSG cell is unable to maintain the established LIPA connection, determine whether the established LIPA connection is a PDN connection unique to the user equipment, and if yes, detach the user equipment. Otherwise, the established LIPA connection is deactivated and the handover preparation failure message and the cause value are returned to the source home base station.
  • the third determining unit 304 is configured to: when the target CSG cell is unable to maintain the established LIPA connection, determine whether the established LIPA connection is a PDN connection unique to the user equipment, and if yes, detach the user equipment. Otherwise, the established LIPA connection is deactivated and the handover preparation failure message and the cause value are returned to the source home base station.
  • the first determining unit 301 determines whether the user equipment carried in the request handover message sent by the source home base station is used to indicate whether the user equipment that needs to perform handover between the base stations establishes a LIPA connection, and if so, according to the The information is judged whether the user equipment that needs to perform cell handover between the base stations is connected to the LIPA connection. Otherwise, the user equipment context information maintained by the local device is queried, and the user equipment that needs to perform cell handover between the base stations is determined to have an LIPA connection according to the user equipment context information.
  • the apparatus shown in FIG. 13 may be a core network management control entity SGSN or MME.
  • the embodiment of the present invention proposes a LIPA connection switching preparation processing scheme that supports LIPA connection switching, which can satisfactorily satisfy the Rel-11 stage, and the system should support the requirement that the user equipment has established LIPA connection switching.
  • the technical solution proposed by the embodiment of the present invention is integrated with the LIPA connection switching preparation process defined in the existing specification, thereby maintaining good compatibility with existing network devices.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention is in the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) in which computer usable program code is embodied.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions are provided for implementing one or more processes and/or block diagrams in the flowchart The steps of the function specified in the box or in multiple boxes.

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Description

一种 LIPA连接切换准备过程的执行方法及装置 本申请要求在 2011年 1月 17日提交中国专利局、 申请号为 201110009868.4、 发明名 称为"一种 LIPA连接切换准备过程的执行方法及装置"的中国专利申请的优先权, 其全部 内容通过引用结合在本申请中。 技术领域
本发明涉及通信技术领域, 尤其涉及一种本地 IP接入(Local IP Access, LIPA )连接 切换准备过程的执行方法及装置。
背景技术
LIPA是一种允许用户设备 ( UE )通过家庭基站接入到与该家庭基站关联的本地网络 的技术, 本地网络包括家庭网络、 企业网络等。 用户设备通过本地网关 ( Local Gateway, LGW )接入到本地网络。 在 3GPP Rel-10阶段, 本地网关与家庭基站( H(e) B )在同一个 物理实体上实现, 在 3 GPP Rel-10阶段之后, 本地网关可以与家庭基站在不同物理实体上 实现。 目前, 每个家庭基站支持一个闭合用户群(Closed Subscriber Group, CSG ) 小区, 它为属于该闭合用户群的用户提供通信服务。
由于家庭基站和本地网络的接入受限(例如家庭网络只允许家庭成员接入), 网络需 要对接入家庭基站和本地网络的用户设备进行接入控制, 具体包括:
家庭基站接入控制, 即判断用户设备是否有权限通过某个家庭基站( CSG小区)接入 网络;
本地网络接入控制, 即判断用户设备是否有权限通过某个家庭基站( CSG小区)请求 接入特定的本地网络。 在家庭基站接入控制成功的基础上进行本地网络接入控制。
核心网管理控制实体基于用户设备的签约信息进行家庭基站的接入控制和本地网络 的接入控制。
3GPP Rel-10版本不支持 LIPA连接的移动性, 当用户设备移出激活 LIPA连接所在的 家庭基站小区的覆盖范围时, 该连接需在为用户设备发起切换前去激活。 对于如何去激活 LIPA连接, 目前 3GPP Rel-10标准釆用的方案是: 家庭基站在进行 LIPA连接切换前, 通 过内部接口通知本地网关用户设备需要发起 LIPA连接切换, 之后本地网关发起连接去激 活过程, 释放已建立的 LIPA连接。 在 LIPA连接去激活后, 家庭基站为用户设备发起切换 过程。
此外, 3GPP Rel-10阶段还有一种没有进入标准的方案: 由家庭基站在 LIPA连接切换 前通知核心网管理控制实体, 核心网管理控制实体发起 LIPA连接去激活后, 向家庭基站 返回响应消息, 随后家庭基站再发起 LIPA连接切换过程。 在 LTE ( Long Term Evolution, 长期演进) ***中, 该方案如图 1所示, 其中移动管理实体( Mobility Management Entity, MME ) 是 LTE ***中的核心网管理控制实体, 演进型通用陆地无线接入网 (Evolved Universal Terrestrial Radio Access Network , E-UTRAN )指代此时的无线接入节点, 即家庭 基站。 具体包括:
步骤 1、 LIPA连接切换即将发生时,如果用户设备已有 LIPA连接,则家庭基站向 MME 发送 E-UTRAN 本地连接 LIPA 连接切换指示 (E-UTRAN Local Connection Handover Indication ), 表明此时即将发生 LIPA连接切换, 消息中携带的目标标识( Target ID )表明 LIPA连接切换的目标基站的标识;
步骤 2、 如果该 LIPA连接不是用户设备的最后一个 IP连接, 则 MME发起 MME请 求的分组数据网释放 ( MME requested PDN disconnection )过程释放该 LIPA连接; 否则, 发起去附着过程;
步骤 3、 步骤 2执行完毕后, MME向家庭基站返回 E-UTRAN本地连接 LIPA连接切 换确认( E-UTRAN Local Connection Handover ACK )消息,表示 LIPA连接已释放,即 LIPA 连接去激活过程已完成, 可以进行 LIPA连接切换。 随后, 家庭基站将根据现有过程发起 LIPA连接切换。
下面介绍一下 LIPA连接切换准备过程。
3GPP TS 36.413定义了 LTE***的切换准备过程。
如图 2所示, 源演进型基站( eNodeB )在需要为用户设备发起 LIPA连接切换过程时, 通过向为其提供服务的 MME发送切换请求 ( Handover Required ) 消息来发起切换准备过 程,从而通过核心网请求目标侧小区为用户设备预留资源。在切换准备过程成功完成之后, MME使用切换命令( Handover Command ) 消息对源 eNodeB进行响应。
其中, Handover Required消息中包含源 eNodeB所选择的目标基站标识, 即目标标识 ( Target ID )。 此外, 对于目标基站是家庭基站的情况, 消息中还将包括选择的目标基站的 CSG ID信息。
如图 3 所示, 如果由于某种原因 (例如承载不能建立或接入控制限制), 切换准备操 作不能成功进行, MME将向源 eNodeB返回切换准备失败( Handover Preparation Failure ) 消息, 其中携带切换准备过程的失败原因。
另外, 在 SA2 #81会议中, 讨论 LIPA连接切换的要求时, 还对***的兼容性提出了 需求。
在第三代移动通信标准化组织 (3rd Generation Partnership Project, 3GPP )版本 10 ( Rel-10 )阶段, 家庭基站小区中的 LIPA连接不支持用户设备的移动性, 即网络在为用户 设备发起切换前需要先去激活用户设备已建立的 LIPA 连接。 然而, 在 3GPP 版本 11 ( Rel-11 ) 阶段, 提出网络应支持 LIPA连接的移动性, 即只要满足一定的接入控制条件, 网络就可以为移动用户设备切换已建立的 LIPA连接。 此外, 3GPP Rel-11还要求新引入的 家庭基站***, 能够保持与原有网络的兼容性。 但是, 现有技术中尚未提出能够满足上述 需求的技术方案。
综上所述, 根据 3GPP需求, 在 3GPP Rel-l l阶段, 家庭基站小区的 LIPA通信功能需 要支持用户设备在本地网关内 (Intra-LGW ) 的移动性, 即当用户设备在连接至同一 LGW 的家庭基站之间移动时, ***应能为其进行 LIPA连接切换, 从而保证用户设备 LIPA数据 连接的连续性。 然而, 在 3 GPP Rel- 10阶段标准中, 一旦位于家庭基站小区的用户设备发 生移动, 该用户设备所建立的 LIPA连接将通过在切换处理之前单独引入的分组数据网 ( PDN )连接去激活过程释放。 由此可见, 现有技术及标准不支持用户设备在本地网关内 的移动性。
发明内容
本发明实施例提供了一种 LIPA连接切换准备过程的执行方法及装置, 用以实现支持 LIPA连接切换的 LIPA连接切换准备过程, 从而能够满足 3GPP Rel-11阶段***应支持用 户设备已建立 LIPA连接切换的需求, 实现支持用户设备在本地网关内的移动性。
本发明实施例提供的一种 LIPA连接切换准备过程的执行方法包括:
源家庭基站确定用户设备需要进行 LIPA连接切换;
源家庭基站确定 LIPA连接切换的目标基站小区的类型;
源家庭基站根据 LIPA连接切换的目标基站小区的类型,执行该用户设备的 LIPA连接 切换准备过程。
本发明实施例提供的一种 LIPA连接切换准备过程的执行方法包括:
核心网管理控制实体根据源家庭基站发送的请求切换消息, 确定目标基站小区的类 型;
核心网管理控制实体根据目标基站小区的类型, 执行切换准备过程。
本发明实施例提供的一种 LIPA连接切换准备过程的执行装置包括:
切换确定单元, 用于确定用户设备需要进行 LIPA连接切换;
类型确定单元, 用于确定 LIPA连接切换的目标基站小区的类型;
切换准备过程执行单元, 用于根据 LIPA连接切换的目标基站小区的类型, 执行该用 户设备的 LIPA连接切换准备过程。
本发明实施例提供的一种 LIPA连接切换准备过程的执行装置包括:
类型确定单元,用于根据源家庭基站发送的请求切换消息,确定目标基站小区的类型; 切换准备过程执行单元, 用于根据目标基站小区的类型, 为用户设备执行切换准备过 程。 由于本发明实施例源家庭基站根据 LIPA连接切换的目标基站小区的类型, 执行需要 切换的用户设备的 LIPA连接切换准备过程, 从而实现了支持 LIPA连接切换的 LIPA连接 切换准备过程,能够很好地满足 3GPP Rel-l l阶段***应支持用户设备已建立 LIPA连接切 换的需求, 并且实现了支持用户设备在本地网关内的移动性。
附图说明
图 1为背景技术中 3GPP Rel-10 切换过程中, 家庭基站触发的 LIPA连接去激活过程 示意图;
图 2为背景技术中切换准备过程成功的流程示意图;
图 3为背景技术中切换准备过程失败的流程示意图;
图 4为本发明实施例提供的一种 LIPA连接切换准备过程的执行方法的流程示意图; 图 5为本发明实施例提供的源 H(e) B在需要将用户设备 LIPA连接切换至新的基站情 况下, 发起 LIPA连接切换准备过程之前的处理流程示意图;
图 6为本发明实施例提供的核心网管理控制实体判断用户设备是否建立有 LIPA连接 的流程示意图;
图 7为本发明实施例提供的自接收到源 H(e) B发送的请求切换消息之后, 核心网管 理控制实体 (服务通用分组无线业务 ( General Packet Radio Service , GPRS ) 支持节点 ( Serving GPRS Support Node, SGSN ), 或 MME )处理流程示意图;
图 8为本发明实施例提供的实施例一的处理流程示意图;
图 9为本发明实施例提供的实施例二的处理流程示意图;
图 10为本发明实施例提供的实施例三的处理流程示意图;
图 11为本发明实施例提供的实施例四的处理流程示意图;
图 12为本发明实施例提供的一种 LIPA连接切换准备过程的执行装置示意图; 图 13为本发明实施例提供的一种 LIPA连接切换准备过程的执行装置示意图。
具体实施方式
为了能够支持用户设备 Intra-LGW移动性, 本发明实施例提出一种支持 LIPA连接切 换的 LIPA连接切换准备处理方案,对于在家庭基站小区范围内已建立 LIPA连接的用户设 备, 当用户设备发生移动, 需要进行 LIPA连接切换时, 源家庭基站根据用户设备所要切 换至的目标基站小区类型, 向核心网管理控制实体(例如, SGSN或 MME等)发起 LIPA 连接切换准备过程。
在收到家庭基站发送的请求切换消息之后, 核心网管理控制实体根据接收到的, 或者 本地存储的信息, 判断选择的目标小区是否能够继续为用户设备保持已建立的 LIPA连接。 如果 LIPA连接不能保持, 核心网管理控制实体首先执行 LIPA连接去激活过程, 之后向源 家庭基站返回切换准备失败消息, 并通过原因值指示其重新发起切换准备过程。如果 LIPA 能够保持, 则核心网管理控制实体继续执行切换准备过程。
下面结合附图给出本发明实施例的详细说明。
在基站侧, 参见图 4, 本发明实施例提供的一种 LIPA连接切换准备过程的执行方法, 包括步骤:
S101、 源家庭基站确定用户设备需要进行 LIPA连接切换;
5102、 源家庭基站确定 LIPA连接切换的目标基站小区的类型;
5103、源家庭基站根据 LIPA连接切换的目标基站小区的类型,执行该用户设备的 LIPA 连接切换准备过程。
较佳地, 当 LIPA连接切换的目标基站小区为宏基站小区时, 源家庭基站根据 LIPA连 接切换的目标基站小区的类型, 执行与该用户设备相对应的 LIPA连接切换准备过程, 包 括:
源家庭基站通过向本地网关 LGW发送通知消息,触发 LGW发起 LIPA连接去激活过 程;
源家庭基站当确定 LIPA连接去激活过程完成时, 源家庭基站通过向核心网管理控制 实体发送请求切换消息, 发起切换准备过程。
较佳地, 当 LIPA连接切换的目标基站小区为 CSG小区时, 源家庭基站根据 LIPA连 接切换的目标基站小区的类型, 执行与该用户设备相对应的 LIPA连接切换准备过程, 包 括:
源家庭基站通过向核心网管理控制实体发送请求切换消息, 发起切换准备过程。
较佳地, 请求切换消息中, 包括用于向核心网管理控制实体指示需要进行基站之间切 换的用户设备是否建立有 LIPA连接的信息。
较佳地, 在切换准备过程中, 当源家庭基站接收到核心网管理控制实体发送的对于 LIPA连接的分组数据协议 ( Packet Data Protocol, PDP )上下文去激活操作指令, 或演进 型分组***( Evolved Packet System, EPS )承载去激活操作指令时, 源家庭基站去激活该 LIPA连接, 并向核心网管理控制实体返回响应消息。
较佳地, 当源家庭基站接收到核心网管理控制实体发送的切换准备失败消息, 并且其 中携带的原因值为去激活已建立的 LIPA连接时,源家庭基站在完成该 LIPA连接的去激活 操作之后 , 通过向核心网管理控制实体重新发送请求切换消息, 再次发起切换准备过程。
如图 5所示, 源 H(e) B在需要将用户设备 LIPA连接切换至新的基站情况下, 发起 LIPA连接切换准备过程之前主要的处理流程 , 具体包括步骤:
5201、 源 H0) B确定用户设备发生移动, 需要将该用户设备切换到新的基站(目标 基站) 下。
5202、 源 H(e) B判断源 H(e) B所选择的目标基站小区是否为宏基站小区, 如果是, 则执行步骤 S203; 否则, 执行步骤 S206。
5203、 源 H(e) B判断用户设备是否建立有 LIPA连接, 如果是, 则执行步骤 S204; 否则, 执行步骤 S206。
5204、 源 H(e) B通知 LGW去激活已建立的 LIPA连接。
S205、 源 Η(» Β确定完成 LIPA连接去激活过程。
S206、 源 H(e) B发起切换准备过程。
也就是说, 步骤 S202 需要判断目标基站是何种类型的目标基站小区, 并基于此做后 续处理, 具体包括以下两种情况:
情况 A. 若源 H(e) B选择的目标基站小区为宏基站小区 (如, NodeB小区、 eNodeB 小区等), 那么源 H(e) B通过 H(e)NB与 LGW之间的内部接口 (当 H(e)NB和 LGW位于 同一实体时), 或通过 H(e) B与 LGW之间的外部接口, 向 LGW发送通知消息, 以触发 LGW发起 LIPA连接去激活过程, 释放已建立的 LIPA连接, 然后, 在确认 LIPA连接被去 激活之后, 发起切换准备过程。
情况 B. 若选择的目标基站小区为 CSG小区(其中的基站为 H(e) B ),那么,源 H(e) B 向核心网管理控制实体发送请求切换消息, 从而发起切换准备过程。
对于情况 A,在确认 LIPA连接被去激活之后 , 源 H(e) B向核心网管理控制实体发送 请求切换消息, 从而发起切换准备过程。 其中, 确认 LIPA连接被去激活的方法, 可以是 源 H(e) B收到核心网管理控制实体发送的对于 LIPA连接的分组数据协议上下文去激活操 作指令或演进型分组***承载去激活操作指令,也可以是收到 LGW返回的 LIPA连接去激 活响应消息, 等。
对于情况 B, 可选地, 源 H(e) B可在请求切换消息中增加信息单元(例如: 本地连 接指示), 用于向核心网管理控制实体指示需要进行基站之间切换的用户设备是否建立有 LIPA连接。
对于情况 B, 在切换准备过程中, 当源 H(e) B接收到核心网管理控制实体发送的对 于 LIPA连接的 PDP上下文去激活操作指令或 EPS 承载去激活操作指令时, 源 H(e) B去 激活 LIPA连接, 并向核心网管理控制实体返回相应的响应消息。
其中, 对于 LIPA连接的 PDP上下文去激活操作指令, 可以为: 去激活 PDP上下文请 求 ( Deactivate PDP Context Request ) 消息、;
EPS 载去激活操作指令, 可以为: 去激活 载请求 ( Deactivate Bearer Request ) 消 息。
对于情况 B, 进一步, 当源 H(e) B接收到核心网管理控制实体发送的切换准备失败 消息, 并且其中携带的原因值为 "去激活已建立的 (LIPA ) PDN连接" 时, 源 H(e)NB在 LIPA连接去激活操作完成之后 , 向核心网管理控制实体重新发送请求切换消息,从而再次 发起切换准备过程。
在核心网管理控制实体侧, 本发明实施例提供的一种 LIPA连接切换准备过程的执行 方法, 包括:
步骤一: 核心网管理控制实体根据源家庭基站发送的请求切换消息, 确定目标基站小 区的类型;
步骤二: 核心网管理控制实体根据目标基站小区的类型, 执行切换准备过程。
较佳地, 当目标基站小区为宏基站小区时, 核心网管理控制实体根据目标基站小区的 类型, 执行切换准备过程, 包括:
核心网管理控制实体按照 3GPP TS 23.401协议规定, 继续执行切换准备过程。
较佳地, 当目标基站小区为 CSG小区时,核心网管理控制实体根据目标基站小区的类 型, 执行切换准备过程, 包括:
核心网管理控制实体判断需要进行基站间小区切换的用户设备是否建立有 LIPA连接; 当用户设备没有建立 LIPA连接时, 核心网管理控制实体按照 3GPP TS 23.401协议规 定, 继续执行该用户设备的切换准备过程;
当用户设备建立有 LIPA连接时, 核心网管理控制实体判断目标 CSG小区是否能够保 持已建立的 LIPA连接;
当目标 CSG小区能够保持已建立的 LIPA连接时, 核心网管理控制实体按照 3GPP TS 23.401协议规定, 继续执行该用户设备的 LIPA连接切换准备过程。
较佳地, 当目标 CSG小区不能够保持已建立的 LIPA连接时, 核心网管理控制实体判 断已建立的 LIPA连接是否是该用户设备唯一的分组数据网 PDN连接, 如果是, 则核心网 管理控制实体去附着该用户设备; 否则, 核心网管理控制实体去激活已建立的 LIPA连接, 并返回切换准备失败消息及原因值给源家庭基站。
较佳地, 核心网管理控制实体判断需要进行基站间小区切换的用户设备是否建立有 LIPA连接, 包括:
核心网管理控制实体判断源家庭基站发送的请求切换消息中, 是否携带的用于指示需 要进行基站之间切换的用户设备是否建立有 LIPA连接的信息, 如果是, 则根据该信息判 断需要进行基站间小区切换的用户设备是否建立有 LIPA连接; 否则, 查询本地维护的用 户设备上下文信息, 根据用户设备上下文信息判断需要进行基站间小区切换的用户设备是 否建立有 LIPA连接。
在实施中, 本发明实施例中的核心网管理控制实体为 SGSN或 MME。
也就是说, 本发明实施例中, 核心网管理控制实体在收到源 H(e) B发送的请求切换 消息后, 核心网管理控制实体首先根据消息中的 Target ID及 CSG ID信息, 判断目标基站 小区的类型。若目标基站小区为宏基站小区,那么核心网管理控制实体按照 3GPP TS 23.401 协议中规定的流程进行处理, 即继续执行切换准备过程。 若目标基站小区为 CSG小区, 那 么核心网管理控制实体在执行完家庭基站接入控制之后 , 应首先判断用户设备是否建立有 LIPA连接。
参见图 6,核心网管理控制实体在接收到源 H(e) B发送的请求切换消息后,判断用户 设备是否建立有 LIPA连接的处理流程包括以下步骤:
5301、 核心网管理控制实体确定当前需要执行判断用户设备是否建立有 LIPA连接的 操作。
5302、 核心网管理控制实体判断 H(e) B发送的请求切换消息中是否包含 "本地连接 指示", 如果是, 则执行步骤 S303 , 否则, 执行步骤 S306。
S303、 核心网管理控制实体判断 "本地连接指示" 是否表明用户设备已经建立 LIPA 连接, 如果是, 则执行步骤 S304, 否则, 执行步骤 S305。
5304、 核心网管理控制实体确定用户设备建立有 LIPA连接。
5305、 核心网管理控制实体确定用户设备未建立 LIPA连接。
5306、 核心网管理控制实体可以通过查找本地维护的用户设备上下文信息, 判断其中 是否指示了用户设备建立有 LIPA连接,如果是, 则执行步骤 S304, 否则,执行步骤 S305。
对于目标基站小区为 CSG小区的情况, 若用户设备未建立 LIPA连接, 核心网管理控 制实体则按照 3GPP TS 23.401协议中规定的流程进行处理, 即继续执行 LIPA连接切换准 备过程。 否则, 核心网管理控制实体对用户设备的 LIPA连接启动本地网络接入控制。
如图 7所示, 核心网管理控制实体自接收到源 H(e) B发送的请求切换消息开始的主 要处理流程, 包括以下步骤:
S401、 核心网管理控制实体接收源 H(e) B发送的请求切换消息。
S402、核心网管理控制实体判断目标小区是否为 CSG小区,如果是,则执行步骤 S403; 否则, 执行步骤 S410。
S403、 核心网管理控制实体判断目标 CSG小区是否允许用户设备接入该目标 CSG小 区, 如果是, 则执行步骤 S404; 否则, 执行步骤 S410。
5404、 核心网管理控制实体判断用户设备是否建立有 LIPA连接, 如果是, 则执行步 骤 S405; 否则, 执行步骤 S410。
5405、 核心网管理控制实体才 居用户签约信息, 或者其他条件(例如, 网络运营商配 置, 网络拓朴结构等), 判断在目标 CSG小区内是否能够为用户设备保持已建立的 LIPA 连接, 如果是, 则执行步骤 S410; 否则, 执行步骤 S406。
5406、 核心网管理控制实体判断将要被去激活的 LIPA连接是否为用户设备所建立的 唯——条 PDN连接, 如果是, 则执行步骤 S408; 否则, 执行步骤 S407。
5407、 核心网管理控制实体发起 LIPA连接去激活过程 ( SGSN发起的 PDP上下文去 激活过程( SGSN-initiated PDP Context Deactivation procedure )或 MME发起的 PDN连接 释放过程 ( MME requested PDN disconnection procedure ) ), 去激活已建立的 LIPA连接。
S408、 核心网管理控制实体将发起去附着过程 (通过 SGSN 发起的去附着 ( SGSN-initiated Detach procedure )或 MME发起的去附着过程( MME-initiated Detach procedure ) ), 将用户设备去激活, 并终止切换过程。
5409、在 LIPA连接去激活之后 ,核心网管理控制实体向源 H(e) B发送切换准备失败 消息, 其中原因值指明失败的原因为: 去激活已建立的 (LIPA ) PDN连接。
5410、 继续执行 3GPP TS 23.401协议规定的切换准备过程。
下面给出几个具体实施例的说明。
实施例一:
场景:在源 H(e) B内, 已建立 LIPA连接的用户设备,需要从源 CSG小区 LIPA连接, 切换至目标宏基站覆盖范围内的一个小区。
参见图 8 , 具体流程包括以下步骤:
S501、 H(e;> B确定目标小区为宏基站小区。
S502、 H(e) B发送通知消息给 LGW, 以触发 LGW去激活已建立的 LIPA连接。
5503、 执行网关 GPRS支持节点 ( GGSN )发起的 PDP上下文去激活过程或 PGW发 起的承载去激活过程。
5504、 H(e) B接收 LGW发送的响应消息。
S505、 H(e) B在接收到 LGW发送的响应消息, 或通过其他方法, 确定 LIPA连接成 功去激活之后 , 发送请求切换消息给核心网管理控制实体, 以发起切换准备流程。
实施例二:
场景:在源 H(e) B内, 已建立 LIPA连接的用户设备,需要从源 CSG小区 LIPA连接, 切换至目标 H(e) B支持的 CSG小区, 并且***允许用户设备通过目标 H(e) B保持已建 立的 LIPA连接。
参见图 9 , 具体流程包括以下步骤:
S601、 H(e) B发送请求切换消息给核心网管理控制实体, 以发起切换准备流程。
5602、 核心网管理控制实体确定目标小区为 CSG小区, 并且目标小区能够为用户设 备保持已建立的 LIPA连接。
5603、 继续执行 3GPP TS 23.401协议规定的切换准备流程。
实施例三:
场景: 在源 H(e) B内, 已建立 LIPA连接的用户设备, 需要从源 CSG小区切换至目 标 H(e) B支持的一个 CSG小区, 但是***不允许用户设备通过目标 H(e) B保持已建立 的 LIPA连接。 并且, 此 LIPA连接不是用户设备建立的唯——条 PDN连接。 参见图 10, 具体流程包括以下步骤:
S701、 H(e) B发送请求切换消息给核心网管理控制实体, 以发起切换准备流程。 S702、 核心网管理控制实体确定目标小区为 CSG小区, 但目标小区不能够为用户设 备保持已建立的 LIPA连接。
S703、 核心网管理控制实体确定已建立的 LIPA连接不是用户设备唯一的 PDN连接。
5704、核心网管理控制实体在判定用户设备不可接入本地网络之后,将已建立的 LIPA 连接去激活, 即执行 SGSN发起的 PDP上下文去激活过程或 MME请求的 PDN连接去激 活过程。
5705、 核心网管理控制实体发送切换准备失败消息给 H(e) B , 其中携带的失败原因 值为 "去激活已建立的 LIPA连接"。
5706、 在收到带有此原因值的切换准备失败消息后, H(e) B 发送请求切换消息给核 心网管理控制实体, 以再次发起切换准备过程。
实施例四:
场景: 在源 H(e) B内, 已建立 LIPA连接的用户设备需要从源 CSG小区 LIPA连接, 切换至目标 H(e) B支持的一个 CSG小区, 但是***不允许用户设备通过目标 H(e) B保 持已建立的 LIPA连接, 并且此连接是用户设备建立的唯——条 PDN连接。
参见图 11 , 具体流程包括以下步骤:
S801、 H(e) B发送请求切换消息给核心网管理控制实体, 以发起切换准备流程。 S802、 核心网管理控制实体确定目标小区为 CSG小区, 但目标小区不能够为用户设 备保持已建立的 LIPA连接。
S803、 核心网管理控制实体确定已建立的 LIPA连接是用户设备唯一的 PDN连接。 S804、执行 SGSN发起的去附着过程或 MME发起的去附着过程, 即在切换准备阶段, 核心网管理控制实体在判定用户设备不可接入本地网络之后 , 将用户设备去激活。
基于同一发明构思, 本发明实施例中还提供了 LIPA连接切换准备过程的执行装置, 由于这些设备解决问题的原理与本发明实施例 LIPA连接切换准备过程的执行方法相似, 因此这些设备的实施可以参见方法的实施, 重复之处不再赘述。
参见图 12, 本发明实施例提供的一种 LIPA连接切换准备过程的执行装置, 包括: 切换确定单元 101 , 用于确定用户设备需要进行 LIPA连接切换;
类型确定单元 102, 用于确定 LIPA连接切换的目标基站小区的类型;
切换准备过程执行单元 103 , 用于根据 LIPA连接切换的目标基站小区的类型,执行该 用户设备的 LIPA连接切换准备过程。
较佳地, 当类型确定单元 102确定的 LIPA连接切换的目标基站小区为宏基站小区时, 切换准备过程执行单元 103包括: 触发去激活单元, 用于通过向本地网关 LGW发送通知消息, 触发 LGW发起 LIPA连 接去激活过程;
发起单元, 用于当确定 LIPA连接去激活过程完成时, 通过向核心网管理控制实体发 送请求切换消息, 发起切换准备过程。
较佳地, 当类型确定单元 102确定的 LIPA连接切换的目标基站小区为 CSG小区时, 切换准备过程执行单元 103 , 通过向核心网管理控制实体发送请求切换消息, 发起切换准 备过程。
较佳地, 切换准备过程执行单元 103 , 发送的请求切换消息中, 包括用于向核心网管 理控制实体指示需要进行基站之间小区切换的用户设备是否建立有 LIPA连接的信息。
较佳地, 该装置还包括:
去激活处理单元, 用于在切换准备过程中, 当接收到核心网管理控制实体发送的对于
LIPA连接的分组数据协议 PDP上下文去激活操作指令,或演进型分组*** EPS 承载去激 活操作指令时, 去激活该 LIPA连接, 并向核心网管理控制实体返回响应消息。 进一步, 去激活处理单元, 当接收到核心网管理控制实体发送的切换准备失败消息, 并且其中携带 的原因值指示为去激活已建立的 LIPA连接时, 在执行完该 LIPA连接的去激活操作之后 , 通过向核心网管理控制实体重新发送请求切换消息, 再次发起切换准备过程。
较佳地, 该装置为基站。
参见图 13 , 本发明实施例提供的一种 LIPA连接切换准备过程的执行装置, 包括: 类型确定单元 201 , 用于根据源家庭基站发送的请求切换消息, 确定目标基站小区的 类型;
切换准备过程执行单元 202, 用于根据目标基站小区的类型, 执行切换准备过程。 较佳地, 当类型确定单元 201确定的目标基站小区为宏基站小区时,
切换准备过程执行单元 202,按照 3GPP TS 23.401协议规定,继续执行切换准备过程。 较佳地, 当类型确定单元 201确定的目标基站小区为 CSG小区时,
切换准备过程执行单元 202, 包括:
第一判断单元 301 ,用于判断需要进行基站间小区切换的用户设备是否建立有 LIPA连 接;
继续执行单元 302, 用于当用户设备没有建立 LIPA连接时, 按照 3GPP TS 23.401协 议规定, 继续执行该用户设备的切换准备过程;
第二判断单元 303 , 用于当用户设备建立有 LIPA连接时, 判断目标 CSG小区是否能 够保持已建立的 LIPA连接; 当目标 CSG小区能够保持已建立的 LIPA连接时, 触发继续 执行单元 302按照 3GPP TS 23.401协议规定, 继续执行该用户设备的切换准备过程。
较佳地, 切换准备过程执行单元 202, 还包括: 第三判断单元 304, 用于当目标 CSG小区不能够保持已建立的 LIPA连接时, 判断已 建立的 LIPA连接是否是该用户设备唯一的分组数据网 PDN连接, 如果是, 则去附着该用 户设备; 否则, 去激活已建立的 LIPA连接, 并返回切换准备失败消息及原因值给源家庭 基站。
较佳地, 第一判断单元 301 , 判断源家庭基站发送的请求切换消息中, 是否携带的用 于指示需要进行基站之间切换的用户设备是否建立有 LIPA连接的信息, 如果是, 则根据 该信息判断需要进行基站间小区切换的用户设备是否建立有 LIPA连接; 否则, 查询本地 维护的用户设备上下文信息, 根据用户设备上下文信息判断需要进行基站间小区切换的用 户设备是否建立有 LIPA连接。
较佳地, 图 13所示装置, 可以为核心网管理控制实体 SGSN或 MME。
综上, 本发明实施例提出了一种支持 LIPA连接切换的 LIPA连接切换准备处理方案, 能够很好地满足 Rel-11阶段, ***应支持用户设备已建立 LIPA连接切换的需求。 此外, 本发明实施例提出的技术方案与现有规范中定义的 LIPA连接切换准备过程相融合, 因此 保持了与现有网络设备之间良好的兼容性。
本领域内的技术人员应明白, 本发明的实施例可提供为方法、 ***、 或计算机程序产 品。 因此, 本发明可釆用完全硬件实施例、 完全软件实施例、 或结合软件和硬件方面的实 施例的形式。 而且, 本发明可釆用在一个或多个其中包含有计算机可用程序代码的计算机 可用存储介盾 (包括但不限于磁盘存储器和光学存储器等)上实施的计算机程序产品的形 式。
本发明是参照根据本发明实施例的方法、 设备(***)、 和计算机程序产品的流程图 和 /或方框图来描述的。 应理解可由计算机程序指令实现流程图和 /或方框图中的每一流 程和 /或方框、 以及流程图和 /或方框图中的流程和 /或方框的结合。 可提供这些计算机 程序指令到通用计算机、 专用计算机、 嵌入式处理机或其他可编程数据处理设备的处理器 以产生一个机器, 使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用 于实现在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的 装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方 式工作的计算机可读存储器中, 使得存储在该计算机可读存储器中的指令产生包括指令装 置的制造品, 该指令装置实现在流程图一个流程或多个流程和 /或方框图一个方框或多个 方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上, 使得在计算机 或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理, 从而在计算机或其他 可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和 /或方框图一个 方框或多个方框中指定的功能的步骤。
显然, 本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和 范围。这样,倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内, 则本发明也意图包含这些改动和变型在内。

Claims

权 利 要 求
1、 一种本地 IP接入 LIPA连接切换准备过程的执行方法, 其特征在于, 该方法包括: 源家庭基站确定用户设备需要进行 LIPA连接切换;
所述源家庭基站根据 LIPA连接切换的目标基站小区的类型, 执行该用户设备的 LIPA 连接切换准备过程。
2、 根据权利要求 1所述的方法, 其特征在于, 所述源家庭基站执行 LIPA连接切换准 备过程, 包括:
当 LIPA连接切换的目标基站小区为宏基站小区时, 所述源家庭基站通过向本地网关 LGW发送通知消息, 触发 LGW发起 LIPA连接去激活过程;
所述源家庭基站确定所述 LIPA连接去激活过程完成时, 通过向核心网管理控制实体 按照 3GPP TS 23.401协议规定发送请求切换消息, 发起切换准备过程。
3、 根据权利要求 1所述的方法, 其特征在于, 所述源家庭基站执 LIPA连接切换准备 过程, 包括:
当 LIPA连接切换的目标基站小区为 CSG小区时, 所述源家庭基站通过向核心网管理 控制实体发送请求切换消息, 发起切换准备过程。
4、 根据权利要求 3 所述的方法, 其特征在于, 所述请求切换消息中, 包括用于向核 心网管理控制实体指示需要进行基站之间切换的用户设备是否建立有 LIPA连接的信息。
5、 根据权利要求 3或 4所述的方法, 其特征在于, 该方法还包括:
在切换准备过程中, 当所述源家庭基站接收到核心网管理控制实体发送的对于 LIPA 连接的分组数据协议 PDP上下文去激活操作指令, 或演进型分组*** EPS 承载去激活操 作指令时, 去激活该 LIPA连接, 并向核心网管理控制实体返回响应消息。
6、 根据权利要求 5所述的方法, 其特征在于, 该方法还包括:
当所述源家庭基站接收到核心网管理控制实体发送的切换准备失败消息, 并且其中携 带的原因值为去激活已建立的 LIPA连接时, 在完成该 LIPA连接的去激活操作之后, 通过 向核心网管理控制实体重新发送请求切换消息, 再次发起切换准备过程。
7、 一种本地 IP接入 LIPA连接切换准备过程的执行方法, 其特征在于, 该方法包括: 核心网管理控制实体根据源家庭基站发送的请求切换消息, 确定目标基站小区的类 型;
所述核心网管理控制实体根据目标基站小区的类型, 执行切换准备过程。
8、 根据权利要求 7 所述的方法, 其特征在于, 所述核心网管理控制实体执行切换准 备过程, 包括:
当目标基站小区为宏基站小区时,所述核心网管理控制实体按照 3GPP TS 23.401协议 规定, 继续执行切换准备过程。
9、 根据权利要求 7 所述的方法, 其特征在于, 所述核心网管理控制实体执行准备过 程, 包括:
当目标基站小区为 CSG小区时,所述核心网管理控制实体判断需要进行基站间小区切 换的用户设备是否建立有 LIPA连接;
当用户设备没有建立 LIPA连接时, 所述核心网管理控制实体按照 3GPP TS 23.401协 议规定, 继续为该用户设备执行切换准备过程;
当用户设备建立有 LIPA连接时, 所述核心网管理控制实体判断目标 CSG小区是否能 够保持已建立的 LIPA连接;
当目标 CSG小区能够保持已建立的 LIPA连接时,所述核心网管理控制实体按照 3GPP TS 23.401协议规定, 继续为该用户设备执行切换准备过程。
10、 根据权利要求 9所述的方法, 其特征在于, 该方法还包括:
当目标 CSG小区不能够保持已建立的 LIPA连接时, 所述核心网管理控制实体判断已 建立的 LIPA连接是否是该用户设备唯一的分组数据网 PDN连接, 如果是, 则核心网管理 控制实体去附着该用户设备;
否则, 核心网管理控制实体去激活已建立的 LIPA连接, 并返回切换准备失败消息及 原因值给源家庭基站。
11、根据权利要求 9或 10所述的方法, 其特征在于, 所述核心网管理控制实体判断用 户设备是否建立有 LIPA连接, 包括:
所述核心网管理控制实体判断源家庭基站发送的请求切换消息中, 是否携带有用于指 示需要进行基站间小区切换的用户设备是否建立有 LIPA连接的信息, 如果是, 则根据该 信息判断需要进行基站间小区切换的用户设备是否建立有 LIPA连接;
否则, 核心网管理控制实体查询本地维护的用户设备上下文信息, 根据用户设备上下 文信息判断需要进行基站间小区切换的用户设备是否建立有 LIPA连接。
12、一种本地 IP接入 LIPA连接切换准备过程的执行装置, 其特征在于, 该装置包括: 切换确定单元, 用于确定用户设备需要进行 LIPA连接切换;
类型确定单元, 用于确定 LIPA连接切换的目标基站小区的类型;
切换准备过程执行单元, 用于根据 LIPA连接切换的目标基站小区的类型, 执行该用 户设备的 LIPA连接切换准备过程。
13、 根据权利要求 12所述的装置, 其特征在于, 所述切换准备过程执行单元包括: 触发去激活单元, 用于当所述类型确定单元确定的 LIPA连接切换的目标基站小区为 宏基站小区时, 通过向本地网关 LGW发送通知消息, 触发 LGW发起 LIPA连接去激活过 程;
发起单元, 用于当确定所述 LIPA连接去激活过程完成时, 通过向核心网管理控制实 体发送请求切换消息, 发起切换准备过程。
14、 根据权利要求 12所述的装置, 其特征在于, 所述切换准备过程执行单元还用于: 当所述类型确定单元确定 LIPA连接切换的目标基站小区为 CSG小区时, 通过向核心 网管理控制实体发送请求切换消息, 发起切换准备过程。
15、 根据权利要求 14 所述的装置, 其特征在于, 所述切换准备过程执行单元发送的 请求切换消息中, 包括用于向核心网管理控制实体指示需要进行基站间小区切换的用户设 备是否建立有 LIPA连接的信息。
16、 根据权利要求 14或 15所述的装置, 其特征在于, 该装置还包括:
去激活处理单元, 用于在切换准备过程中, 当接收到核心网管理控制实体发送的对于 LIPA连接的分组数据协议 PDP上下文去激活操作指令,或演进型分组*** EPS 承载去激 活操作指令时, 去激活该 LIPA连接, 并向核心网管理控制实体返回响应消息。
17、 根据权利要求 16所述的装置, 其特征在于, 所述去激活处理单元还用于: 当接收到核心网管理控制实体发送的切换准备失败消息, 并且其中携带的原因值指示 为去激活已建立的 LIPA连接时, 在执行完该 LIPA连接的去激活操作之后 , 通过向核心网 管理控制实体重新发送请求切换消息, 再次发起切换准备过程。
18、一种本地 IP接入 LIPA连接切换准备过程的执行装置, 其特征在于, 该装置包括: 类型确定单元,用于根据源家庭基站发送的请求切换消息,确定目标基站小区的类型; 切换准备过程执行单元, 用于根据目标基站小区的类型, 为用户设备执行切换准备过 程。
19、 根据权利要求 18 所述的装置, 其特征在于, 所述切换准备过程执行单元具体用 于:
当所述类型确定单元确定目标基站小区为宏基站小区时,按照 3GPP TS 23.401协议规 定, 继续执行切换准备过程。
20、 根据权利要求 18所述的装置, 其特征在于, 所述切换准备过程执行单元包括: 第一判断单元,用于当所述类型确定单元确定目标基站小区为 CSG小区时,判断需要 进行基站间小区切换的用户设备是否建立有 LIPA连接;
继续执行单元, 用于当用户设备没有建立 LIPA连接时, 按照 3GPP TS 23.401协议规 定, 继续为该用户设备执行切换准备过程;
第二判断单元, 用于当用户设备建立有 LIPA连接时, 判断目标 CSG小区是否能够保 持已建立的 LIPA连接; 当目标 CSG小区能够保持已建立的 LIPA连接时, 触发所述继续 执行单元按照 3GPP TS 23.401协议规定,继续为该用户设备执行切换准备过程,切换 LIPA 连接。
21、 根据权利要求 20 所述的装置, 其特征在于, 所述切换准备过程执行单元, 还包 括:
第三判断单元, 用于当目标 CSG小区不能够保持已建立的 LIPA连接时, 判断已建立 的 LIPA连接是否是该用户设备唯一的分组数据网 PDN连接, 如果是, 则去附着该用户设 备; 否则, 去激活已建立的 LIPA连接, 并返回切换准备失败消息及原因值给源家庭基站。
22、 根据权利要求 20或 21所述的装置, 其特征在于, 所述第一判断单元还用于: 判断源家庭基站发送的请求切换消息中, 是否携带有用于指示需要进行基站间小区切 换的用户设备是否建立有 LIPA连接的信息, 如果是, 则根据该信息判断需要进行基站间 小区切换的用户设备是否建立有 LIPA连接; 否则, 查询本地维护的用户设备上下文信息, 根据用户设备上下文信息判断需要进行基站间小区切换的用户设备是否建立有 LIPA连接。
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