WO2017181971A1 - 一种切换的方法、设备和系统 - Google Patents

一种切换的方法、设备和系统 Download PDF

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Publication number
WO2017181971A1
WO2017181971A1 PCT/CN2017/081287 CN2017081287W WO2017181971A1 WO 2017181971 A1 WO2017181971 A1 WO 2017181971A1 CN 2017081287 W CN2017081287 W CN 2017081287W WO 2017181971 A1 WO2017181971 A1 WO 2017181971A1
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Prior art keywords
gwu
gwc
mme
identifier
updated
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PCT/CN2017/081287
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English (en)
French (fr)
Inventor
汪钱纯
樊学芹
刘西亮
刘卫东
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中兴通讯股份有限公司
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Publication of WO2017181971A1 publication Critical patent/WO2017181971A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0027—Control or signalling for completing the hand-off for data sessions of end-to-end connection for a plurality of data sessions of end-to-end connections, e.g. multi-call or multi-bearer end-to-end data connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/12—Reselecting a serving backbone network switching or routing node

Definitions

  • the present invention relates to wireless communication technologies, and in particular, to a method, device and system for handover.
  • SAE System Architecture Evolution
  • 3GPP 3rd Generation Partnership Project
  • the SAE architecture may include: an evolved base station (eNodeB, Evolved Node B) belonging to an evolved radio access network (E-RAN, Evolved RAN) network element, a home subscriber server (HSS), and a mobile station.
  • Management entity MME, Mobility Management Entity
  • Serving GPRS Support Node SGSN
  • S-GW Serving Gateway
  • P-GW Packet Data Network Gateway
  • PCRF Policy and Charging Rule Functionality
  • the S-GW is a user plane entity, which is responsible for user plane data routing processing, and terminates downlink data of the UE in idle state.
  • the S-GW is used to manage and store the SAE bearer context of the user equipment (UE, User Equipment), such as IP bearer service parameters and network internal routing information; it is an anchor point of the internal user plane of the 3GPP system, and one user is in the There can only be one S-GW at a time.
  • the P-GW is responsible for the UE accessing the packet of the Packet Data Network (PDN), assigning the user IP address, and is the mobility anchor of the 3GPP and non-3GPP access systems. Users can access multiple PDN GWs at the same time.
  • PDN Packet Data Network
  • the GwC may include S-GwC and P-GwC, respectively corresponding to the control planes of the S-GW and the P-GW, and is responsible for load sharing, GwU selection, IP address and tunnel identity allocation, policy and charging control.
  • GwU may include S-GwU and P-GwU, respectively corresponding to the user planes of the S-GW and the P-GW, and are responsible for user plane related functions of the S-GW and the P-GW, including data stream identification and deep packet parsing, QoS processing and bearer binding, and buffering of downlink paging data.
  • the docked user plane and control plane interfaces correspond to S-GwC respectively.
  • the other corresponding interface functions are compared with the original SAE architecture.
  • the GW selection performed by the MME according to the existing handover mechanism is actually a selection for the GWC, and the GWC is responsible for selecting and managing the GWU in its corresponding GWU group.
  • the MME determines that the SGW does not need to be changed, that is, the SGwC does not change, and the current SGwU address and the tunnel identifier are sent to the new eNodeB.
  • the new eNodeB does not necessarily obtain the new SGwU address and the tunnel identifier after the SGWU is selected.
  • the uplink and downlink data channels are set up incorrectly, so that the uplink data arrives at the eNodeB and then the original The SGwU transmits, which makes it impossible to connect to the SGwU or the SGwU receives it and discards it, resulting in incorrect uploading. Business continuity and data integrity cannot be guaranteed.
  • the existing MME determines that the SGW changes the mechanism and cannot support the correct and reliable transmission of the data stream in some scenarios, and cannot guarantee the continuity and integrity of the service.
  • the embodiment of the present invention is to provide a method, a device, and a system for switching, which can support reliable transmission of data streams and ensure continuity and integrity of services when the GW control plane and the user plane are separated. Sex.
  • an embodiment of the present invention provides a handover method, where the method is applied to a serving gateway S-GW, and the S-GW includes a separate control plane S-GWC and a user plane S-GWU, and the method includes :
  • the S-GWC receives an S-GW change identifier transmitted by the mobility management entity MME, where the S-GW change identifier is used to indicate that the S-GWU in the S-GW changes and in the S-GW S-GWC does not change;
  • the S-GWC receives the deletion request sent by the MME, and deletes the pre-update S-GWU according to the deletion request;
  • the S-GWC sends a response message after the deletion is completed to the MME.
  • the S-GWC determines the updated S-GWU according to the S-GW change identifier, and includes:
  • the S-GWC selects an S-GWU from its corresponding S-GWU group according to the S-GW change identifier
  • the selected S-GWU replies to the S-GWC to create a user plane response message.
  • the method further includes:
  • the S-GWC receives a modified bearer response sent by the P-GW.
  • the S-GWC deletes the pre-update S-GWU according to the deletion request, and specifically includes:
  • the pre-update S-GWU replies to the S-GWC with a delete user plane response message.
  • an embodiment of the present invention provides a handover method, where the method is applied to a mobility management entity MME, where the method includes:
  • the MME generates an S-GW change identifier according to the handover instruction, and sends the S-GW change identifier to the S-GWC, where the S-GW change identifier is used to indicate that the S-GWU in the S-GW changes and The S-GWC in the S-GW does not change;
  • the MME notifying the updated S-GWU identifier to the evolved base station eNodeB;
  • the MME receives the response message after the deletion is completed by the S-GWC.
  • the method further includes:
  • the MME sends a modify bearer request to the S-GWC, where the modify bearer request is used to indicate that the S-GWC modifies the bearer to the updated S- by interaction with the packet data network gateway P-GW.
  • GWU packet data network gateway
  • the MME receives a modified bearer response sent by the S-GWC.
  • an embodiment of the present invention provides a serving gateway S-GW, where the S-GW includes a separate control plane S-GWC and a user plane S-GWU, where the S-GWC includes: a first receiving module, Determining a module, a first sending module, and a deleting module; wherein
  • the first receiving module is configured to receive an S-GW change identifier transmitted by the mobility management entity MME, where the S-GW change identifier is used to indicate that the S-GWU in the S-GW changes and the S - S-GWC in GW is not change;
  • the determining module is configured to determine an updated S-GWU according to the S-GW change identifier
  • the first sending module is configured to send an update feedback message to the MME, where the update feedback message includes an updated S-GWU identifier, where the MME notifies the evolved base station eNodeB to establish an updated S- GWU data channel;
  • the first receiving module is further configured to receive a deletion request sent by the MME;
  • the deleting module is configured to delete the pre-update S-GWU according to the deletion request
  • the first sending module is further configured to send a response message after the deletion is completed to the MME.
  • the determining module is configured to:
  • the first sending module is further configured to send a modify bearer request to the packet data network gateway P-GW, where the modified bearer request includes the updated S-GWU identifier;
  • the first receiving module is further configured to receive a modified bearer response sent by the P-GW.
  • the deleting module is used to:
  • an embodiment of the present invention provides a mobility management entity MME, where the MME includes a generating module, a second sending module, and a second receiving module, where
  • the generating module is configured to generate an S-GW change identifier according to the switching instruction
  • the second sending module is configured to send the S-GW change identifier to the S-GWC, where the S-GW change identifier is used to indicate that the S-GWU in the S-GW is changed and the S-GW is in the S-GW S-GWC does not change;
  • the second receiving module is configured to receive an update feedback message sent by the S-GWC, where the update feedback message includes an updated S-GWU identifier;
  • the second sending module is configured to notify the evolved base station eNodeB of the updated S-GWU identifier
  • deletion request includes an S-GWU identifier before the update to be deleted
  • the second receiving module is configured to receive a response message after the deletion is completed by the S-GWC.
  • the second sending module is further configured to send a modify bearer request to the S-GWC, where
  • the modify bearer request is used to instruct the S-GWC to modify the bearer to the updated S-GWU by interacting with the packet data network gateway P-GW;
  • the second receiving module is further configured to receive a modified bearer response sent by the S-GWC.
  • an embodiment of the present invention provides a handover system, where the system includes: a serving gateway S-GW having a separate control plane S-GWC and a user plane S-GWU, a mobility management entity MME, and an evolved base station eNodeB. ;among them,
  • the S-GWC is configured to receive an S-GW change identifier transmitted by the MME, where the S-GW change identifier is used to indicate that an S-GWU in the S-GW changes and the S-GW The S-GWC does not change; and,
  • the MME is configured to generate an S-GW change identifier according to the handover instruction, and send the S-GW change identifier to the S-GWC, where the S-GW change identifier is used to indicate that the S-GWU in the S-GW is changed. And the S-GWC in the S-GW does not change;
  • deletion request includes an S-GWU identifier before the update to be deleted
  • the embodiment of the invention provides a method, a device and a system for handover.
  • the S-GWC selects the S-GWU according to the S-GW change identifier sent by the MME
  • the S-GWU feeds back the updated S-GWU to the MME, so that the MME
  • the other network elements in the network architecture notify the updated S-GWU, so that other network elements can update the S-GWU in time, so that other network elements and the S-GW can interact with the user plane data through the updated S-
  • the GWU interacts to ensure correct and reliable transmission of user plane data, and also ensures continuity and integrity of the service.
  • FIG. 1 is a schematic diagram of a SAE network architecture provided by the prior art
  • FIG. 2 is a schematic diagram of a SAE network architecture in a case where a control plane and a user plane of a GW are separated according to the prior art;
  • FIG. 3 is a schematic flowchart of a method for applying handover to an S-GW according to an embodiment of the present disclosure
  • FIG. 4 is a schematic flowchart of determining an updated S-GWU according to an embodiment of the present disclosure
  • FIG. 5 is a schematic flowchart of modifying a bearer according to an embodiment of the present disclosure
  • FIG. 6 is a schematic flowchart of deleting an S-GWU before updating according to an embodiment of the present invention.
  • FIG. 7 is a schematic flowchart of a method for applying handover to an MME according to an embodiment of the present disclosure
  • FIG. 8 is a schematic flowchart of another modified bearer according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic diagram of a specific implementation process of a handover according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic diagram of another implementation process of another handover according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic diagram of another implementation process of a handover according to an embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of an S-GW according to an embodiment of the present disclosure.
  • FIG. 13 is a schematic structural diagram of an MME according to an embodiment of the present disclosure.
  • FIG. 14 is a schematic structural diagram of a system for switching according to an embodiment of the present invention.
  • the serving gateway S-GW in the method includes a separate control plane S-GWC and a user plane S. -GWU, the method can include:
  • the S-GWC receives the S-GW change identifier transmitted by the MME.
  • the S-GW change identifier is used to indicate that the S-GWU in the S-GW changes and the S-GWC in the S-GW does not change.
  • control plane S-GWC of the S-GW is connected to the MME, and performs data interaction through the S11 interface.
  • the MME After receiving the path switching request message sent by another network element, such as the radio access network element eNodeB, or receiving the tracking area update message sent by the user, the MME confirms that the S-GWC in the S-GW is not When there is a change but the S-GWU changes, the S-GW change identifier is encapsulated in the create session request sent to the S-GWC.
  • the S-GWC determines the updated S-GWU according to the S-GW change identifier, and sends an update feedback message to the MME.
  • the update feedback message includes an updated S-GWU identifier, and the MME notifies the eNodeB to establish a data channel with the updated S-GWU.
  • the update feedback message may be encapsulated in the create session response.
  • the S-GWC determines the updated S-GWU according to the S-GW change identifier, which may include:
  • the S-GWC selects an S-GWU from the S-GWU group corresponding to the S-GW according to the S-GW change identifier.
  • S402 The S-GWC sends a create user plane request message to the selected S-GWU.
  • S403 The selected S-GWU replies to the S-GWC to create a user plane response message.
  • the method may further include S501 and S502:
  • the S-GWC sends a modify bearer request to the packet data network gateway P-GW, where the modified bearer request includes the updated S-GWU identifier.
  • the S-GWC receives the modified bearer response sent by the P-GW.
  • S501 and S502 are generally performed after the S-GWC determines the updated S-GWU according to the S-GW change identifier, and the sequence of execution is not specifically limited in the embodiment of the present invention.
  • the S-GWC needs to perform the modify bearer request initiated by the MME to return the modified bearer response, which is used in this embodiment. Do not repeat them.
  • the S-GWC receives the deletion request sent by the MME, and deletes the pre-update S-GWU according to the deletion request.
  • the deletion request includes an S-GWU identifier before the update that needs to be deleted.
  • the S-GWC deletes the pre-update S-GWU according to the deletion request, and specifically includes S601 to S602:
  • S601 The S-GWC sends a delete user plane request message to the pre-update S-GWU.
  • S602 The S-GWU before the update replies to the S-GWC to delete the user plane response message.
  • the pre-update S-GWU can be deleted from the S-GWC.
  • the S-GWC is currently
  • the corresponding S-GWU is the updated S-GWU.
  • S304 The S-GWC sends a response message after the deletion is completed to the MME.
  • the MME receives the response message after the deletion is completed, the data transmission between the network element and the S-GW in the SAE architecture can be confirmed, and the user plane related data is transmitted through the updated S-GWU. Interaction.
  • the embodiment provides a method for switching the serving gateway S-GW that is separated from the control plane and the user plane.
  • the S-GWC selects the S-GWU according to the S-GW change identifier sent by the MME
  • the updated S- The GWU feeds back to the MME, so that the MME notifies the other network elements in the network architecture of the updated S-GWU, so that other network elements update the S-GWU in time, so that other network elements and the S-GW can perform user plane data.
  • the interaction is performed through the updated S-GWU, which ensures the correct and reliable transmission of the user plane data, and also ensures the continuity and integrity of the service.
  • FIG. 7 is a flowchart of a method for applying handover to a mobility management entity MME according to an embodiment of the present invention.
  • the method may include:
  • the MME generates an S-GW change identifier according to the handover instruction, and sends the S-GW change identifier to the S-GWC.
  • the S-GW change identifier is used to indicate that the S-GWU in the S-GW changes and the S-GWC in the S-GW does not change.
  • the opposite end of the MME is a serving gateway S-GW whose control plane is separated from the user plane.
  • the MME is connected to the control plane S-GWC of the S-GW. And data interaction through the S11 interface.
  • the MME may determine that the S-GWC does not change according to the handover instruction, and determine that the S-GWU changes according to the current location information sent by the UE, such as the Tracking Area (TA) information, thereby generating the S-GW. Change the logo.
  • TA Tracking Area
  • the MME can encapsulate the S-GW change identifier in the create session request sent to the S-GWC.
  • the MME receives an update feedback message sent by the S-GWC.
  • the update feedback message includes an updated S-GWU identifier.
  • the update feedback message may be encapsulated in the create session response.
  • the method may further include S801 and S802:
  • S801 The MME sends a modify bearer request to the S-GWC.
  • modification bearer request is used to instruct the S-GWC to modify the bearer to the updated S-GWU through interaction with the P-GW.
  • S802 The MME receives the modified bearer response sent by the S-GWC.
  • the S801 and the S802 are configured to send a request to the S-GWC to modify the data bearer.
  • the MME may also send the modify bearer request to the S-GWC, and the S-GWC may also determine the update.
  • the S-GWU interacts with the P-GW, it implements the modification of the data bearer.
  • S703 The MME notifies the eNodeB of the updated S-GWU identifier.
  • the eNodeB changes the S-GWU that is connected to the S-GW to the updated S-GWU, so that the S-GWU can be updated with the S-GW.
  • the GWU performs data interaction on the user plane.
  • S704 The MME sends a delete request to the S-GWC.
  • the deletion request includes an S-GWU identifier before the update that needs to be deleted.
  • S705 The MME receives the response message after the deletion is completed by the S-GWC.
  • the MME receives the response message after the deletion is completed, the data transmission between the network element and the S-GW in the SAE architecture can be confirmed, and the user plane related data is transmitted through the updated S-GWU. Interaction.
  • the embodiment provides a handover method applied to the MME, where the MME sends an S-GW change identifier to the S-GWC, so that the S-GWC updates the S-GWU, and the MME notifies the other network elements in the network architecture of the update.
  • the S-GWU enables other network elements to update the S-GWU in time, so that other network elements and the S-GW can interact with the S-GW when interacting with the S-GW, thereby ensuring user plane data. Proper and reliable transmission also guarantees continuity and integrity of the business.
  • FIG. 9 is a specific implementation process of the handover provided by the embodiment of the present invention.
  • the location change is performed by the user equipment UE. Therefore, the tracking area TA update is taken as an example for description.
  • the specific process may include:
  • S901 The UE sends a tracking area update message.
  • the MME determines, according to the tracking area update message, that the S-GWU in the S-GW changes and the S-GWC in the S-GW does not change.
  • S903 The MME sends a create session request to the S-GWC.
  • the S-GWU in the S-GW is included in the S-GW, and the S-GWC in the S-GW is included in the Create Session Request.
  • the S-GW change identifier that does not change.
  • S904 The S-GWC selects an S-GWU from its corresponding S-GWU group according to the S-GW change identifier.
  • the selected S-GWU is the updated S-GWU.
  • S905 The S-GWC sends a create user plane request message to the selected S-GWU.
  • S906 The selected S-GWU replies to the S-GWC to create a user plane response message.
  • S907 The S-GWC sends a modify bearer request to the packet data network gateway P-GW.
  • the modified bearer request includes an updated S-GWU identifier.
  • S908 The P-GW sends a modified bearer response to the S-GWC.
  • S909 The S-GWC sends a create session response to the MME.
  • the create session response encapsulates an update feedback message, and the update feedback message includes an updated S-GWU identifier.
  • S910 The MME notifies the eNodeB of the updated S-GWU identifier.
  • S912 The MME sends a delete request to the S-GWC.
  • the deletion request includes the S-GWU identifier before the update that needs to be deleted;
  • S913 The S-GWC sends a delete user plane request message to the pre-update S-GWU.
  • S914 The pre-update S-GWU replies to the S-GWC to delete the user plane response message;
  • S915 The S-GWC sends a response message after the deletion is completed to the MME.
  • the MME After the MME receives the response message after the deletion is completed, the data transmission between the network element and the S-GW in the SAE architecture can be confirmed, and the user plane related data is transmitted and exchanged through the updated S-GWU.
  • This embodiment provides a specific implementation process of the handover method.
  • the S-GWU After the S-GWC selects the S-GWU according to the S-GW change identifier sent by the MME, the S-GWU feeds back the updated S-GWU to the MME, so that the MME is directed to the network architecture.
  • the other network elements in the notification notify the updated S-GWU, so that other network elements can update the S-GWU in time, so that other network elements and the S-GW can perform user plane data interaction through the updated S-GWU.
  • the interaction ensures the correct and reliable transmission of the user plane data, and also ensures the continuity and integrity of the service.
  • FIG. 10 shows a specific implementation process of the handover provided by the embodiment of the present invention.
  • the S1 interface is changed by the S-GWU.
  • the specific process may include:
  • the radio access network element sends a handover request message to the MME.
  • the MME determines, according to the handover request, that the S-GWC address does not change, and according to the current location of the UE, such as tracking The area (TA, Tracking Area) determines the S-GWU change;
  • S1003 The MME sends a create session request to the S-GWC.
  • the S-GW change identifier for indicating that the S-GWU in the S-GW changes and the S-GWC in the S-GW does not change is included in the create session request.
  • the S-GWC selects an S-GWU from its corresponding S-GWU group according to the S-GW change identifier.
  • the selected S-GWU is the updated S-GWU.
  • S1005 The S-GWC sends a create user plane request message to the selected S-GWU.
  • S1006 The selected S-GWU replies to the S-GWC to create a user plane response message.
  • S1007 The S-GWC sends a create session response to the MME.
  • the create session response encapsulates an update feedback message, and the update feedback message includes an updated S-GWU identifier.
  • S1008 The MME notifies the eNodeB of the updated S-GWU identifier.
  • S1010 The MME sends a first modified bearer request to the S-GwC.
  • S1011 The S-GWC sends a second modified bearer request to the packet data network gateway P-GW.
  • the second modified bearer request includes an updated S-GWU identifier.
  • the P-GW sends a second modified bearer response to the S-GWC.
  • the S-GWC sends a first modified bearer response to the MME.
  • S1014 The MME sends a delete request to the S-GWC.
  • the deletion request includes the S-GWU identifier before the update that needs to be deleted;
  • S1015 The S-GWC sends a delete user plane request message to the pre-update S-GWU.
  • S1016 The S-GWU before the update replies to the S-GWC to delete the user plane response message;
  • S1017 The S-GWC sends a response message after the deletion is completed to the MME.
  • the embodiment provides another method for implementing the handover.
  • the S-GWU After the S-GWC selects the S-GWU according to the S-GW change identifier sent by the MME, the S-GWU feeds back the updated S-GWU to the MME, so that the MME sends the network to the network.
  • the other network elements in the architecture notify the updated S-GWU, so that other network elements can update the S-GWU in time, so that other network elements can interact with the S-GW to perform user plane data, and the updated S-GWU is adopted.
  • the interaction ensures the correct and reliable transmission of the user plane data, and also ensures the continuity and integrity of the service.
  • the path switching changed by the S-GWU is taken as an example for description.
  • the specific process may include:
  • the radio access network element sends a path switch request message to the MME.
  • the MME determines that the S-GWC address does not change according to the handover request, and determines that the S-GWU changes according to the current location of the UE, such as a tracking area (TA, Tracking Area).
  • TA Tracking Area
  • S1103 The MME sends a create session request to the S-GWC.
  • the S-GW change identifier for indicating that the S-GWU in the S-GW changes and the S-GWC in the S-GW does not change is included in the create session request.
  • S1104 The S-GWC selects an S-GWU from its corresponding S-GWU group according to the S-GW change identifier.
  • the selected S-GWU is the updated S-GWU.
  • S1105 The S-GWC sends a create user plane request message to the selected S-GWU.
  • S1106 The selected S-GWU replies to the S-GWC to create a user plane response message.
  • the S-GWC sends a modify bearer request to the packet data network gateway P-GW.
  • the modified bearer request includes an updated S-GWU identifier.
  • S1108 The P-GW sends a modify bearer response to the S-GWC.
  • S1109 The S-GWC sends a create session response to the MME.
  • the create session response encapsulates an update feedback message, and the update feedback message includes an updated S-GWU identifier.
  • S1110 The MME notifies the eNodeB of the updated S-GWU identifier.
  • S1112 The MME sends a delete request to the S-GWC.
  • the deletion request includes the S-GWU identifier before the update that needs to be deleted;
  • S1113 The S-GWC sends a delete user plane request message to the pre-update S-GWU.
  • S1114 The pre-update S-GWU replies to the S-GWC to delete the user plane response message;
  • S1115 The S-GWC sends a response message after the deletion is completed to the MME.
  • This embodiment provides a specific implementation process of the handover method.
  • the S-GWU After the S-GWC selects the S-GWU according to the S-GW change identifier sent by the MME, the S-GWU feeds back the updated S-GWU to the MME, so that the MME sends the network to the network.
  • the other network elements in the architecture notify the updated S-GWU, so that other network elements can update the S-GWU in time, so that other network elements can interact with the S-GW to perform user plane data, and the updated S-GWU is adopted.
  • the interaction ensures the correct and reliable transmission of the user plane data, and also ensures the continuity and integrity of the service.
  • the S-GW 120 may include a separate control plane S-GWC 1201 and a user plane S-.
  • the S-GWC 1201 includes: a first receiving module 12011, a determining module 12012, a first sending module 12013, and a deleting module 12014;
  • the first receiving module 12011 is configured to receive an S-GW change identifier transmitted by the mobility management entity MME, where the S-GW change identifier is used to indicate that the S-GWU in the S-GW changes and The S-GWC in the S-GW does not change;
  • the determining module 12012 is configured to determine an updated S-GWU according to the S-GW change identifier
  • the first sending module 12013 is configured to send an update feedback message to the MME, where the update feedback message includes an updated S-GWU identifier, where the MME notifies the evolved base station eNodeB to establish the updated S - GWU data channel;
  • the first receiving module 12011 is further configured to receive a deletion request sent by the MME;
  • the deleting module 12014 is configured to delete the pre-update S-GWU according to the deletion request;
  • the first sending module 12013 is further configured to send a response message after the deletion is completed to the MME.
  • the determining module 12012 is configured to:
  • the first sending module 12013 is further configured to send a modify bearer request to the packet data network gateway P-GW, where the modified bearer request includes the updated S-GWU identifier;
  • the first receiving module 12011 is further configured to receive a modified bearer response sent by the P-GW.
  • the deleting module 12014 is configured to:
  • an MME 130 may include: a generating module 1301, a second sending module 1302, and a second receiving module 1303;
  • the generating module 1301 is configured to generate an S-GW change identifier according to the switching instruction.
  • the second sending module 1302 is configured to send an S-GW change identifier to the S-GWC, where the S-GW change identifier is used to indicate that the S-GWU in the S-GW is changed and the S-GW is in the S-GW.
  • the S-GWC does not change;
  • the second receiving module 1303 is configured to receive an update feedback message sent by the S-GWC, where the update feedback message includes an updated S-GWU identifier;
  • the second sending module 1302 is configured to notify the evolved base station eNodeB of the updated S-GWU identifier
  • deletion request includes an S-GWU identifier before the update to be deleted
  • the second receiving module 1303 is configured to receive a response message after the deletion is completed by the S-GWC.
  • the second sending module 1302 is further configured to send a modify bearer request to the S-GWC, where the modify bearer request is used to indicate that the S-GWC passes the packet data network gateway P- The interaction of the GW changes the bearer to the updated S-GWU;
  • the second receiving module 1303 is further configured to receive a modified bearer response sent by the S-GWC.
  • the system may include: a separate control plane S-GWC 1201 and a user plane S-GWU. a serving gateway S-GW of 1202, a mobility management entity MME 130, and an evolved base station eNodeB 150; wherein
  • the S-GWC 1201 is configured to receive an S-GW change identifier transmitted by the MME 130, where the S-GW change identifier is used to indicate that the S-GWU in the S-GW changes and the S - the S-GWC in the GW does not change; and,
  • the MME 130 is configured to generate an S-GW change identifier according to the handover instruction, and send the S-GW change identifier to the S-GWC, where the S-GW change identifier is used to indicate that the S-GWU in the S-GW changes. And the S-GWC in the S-GW does not change;
  • deletion request includes an update before the update to be deleted S-GWU logo
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention can take the form of a hardware embodiment, a software embodiment, or a combination of software and hardware. Moreover, the invention can take 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.) including computer usable program code.
  • 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 provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.
  • the technical solution of the present application can be applied to the field of wireless communication technologies.
  • the S-GWU After the S-GWC selects the S-GWU according to the S-GW change identifier sent by the MME, the S-GWU feeds back the updated S-GWU to the MME, so that the MME notifies the other network elements in the network architecture of the updated S-GWU, so that the other The network element updates the S-GWU in time, so that other network elements and the S-GW can interact with the S-GW when interacting with the S-GW, thereby ensuring correct and reliable transmission of the user plane data. Guarantee the continuity and integrity of the business.

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Abstract

本发明实施例公开了一种切换的方法、设备和系统；该方法可以包括：S-GWC接收由移动管理实体MME传输的S-GW变更标识；所述S-GWC根据所述S-GW变更标识确定更新的S-GWU，并向所述MME发送更新反馈消息；所述S-GWC接收由所述MME发送的删除请求，并根据所述删除请求删除更新前的S-GWU；所述S-GWC将删除完成后的响应消息发送至所述MME。

Description

一种切换的方法、设备和系统 技术领域
本发明涉及无线通信技术，尤其涉及一种切换的方法、设备和系统。
背景技术
系统架构演进(SAE，System Architecture Evolution)是第三代合作伙伴计划(3GPP，3rd Generation Partnership Project)针对下一代移动无线网络所提出的网络架构。如图1所示，SAE架构可以包括：属于演进的无线接入网(E-RAN，Evolved RAN)网元的演进基站(eNodeB，Evolved NodeB)、归属用户服务器(HSS，Home Subscriber Server)、移动管理实体(MME，Mobility Management Entity)、服务GPRS支持节点(SGSN，Serving GPRS Support Node)、服务网关(S-GW，Serving Gateway)、分组数据网网关(P-GW，Packet Data Network Gateway)、策略和合计费规则功能实体(PCRF，Policy and Charging Rule Functionality)。上述SAE架构的网元中，S-GW是一个用户面实体，负责用户面数据路由处理，终结处于空闲状态的UE的下行数据。S-GW用来管理和存储用户设备(UE，User Equipment)的SAE承载(bearer)上下文，比如IP承载业务参数和网络内部路由信息等；是3GPP系统内部用户面的锚点，一个用户在一个时刻只能有一个S-GW。而P-GW负责UE接入分组数据网(PDN，Packet Data Network)的网关，分配用户IP地址，同时是3GPP和非3GPP接入系统的移动性锚点。用户在同一时刻能够接入多个PDN GW。
随着无线业务需求的增长，用户数据流的处理会集中在图1所示的SAE结构中的P-GW，由于P-GW的控制层面和数据转发层面的高度耦合，并且数据流的处理导致数据转发层面的升级扩容频度高于控制层面，因此，P-GW的控制层面和数据转发层面需要同步升级扩容，造成了成本的增加。因此，目前提出了分别将S-GW与P-GW的控制层面与转发层面进行分离的网络架构，如图2所示，将图1所示的SAE架构中的S-GW以及P-GW分别都拆分成了网关控制面(GwC，Gateway Controller)和网关用户面(GwU，Gateway User)两类功能网元。在图2中，GwC可以包括S-GwC和P-GwC，分别对应S-GW和P-GW的控制面，负责负荷分担、GwU的选择、IP地址和隧道标识的分配、策略和计费控制等功能；GwU可以包括S-GwU和P-GwU，分别对应S-GW和P-GW的用户面，负责S-GW和P-GW的用户面相关功能，包括数据流识别和深度包解析、QoS处理和承载绑定，下行寻呼数据的缓存等功能。图2中，对接的用户面和控制面接口分别对应到S-GwC /P-GwC和S-GwU/P-GwU上，其余相应接口功能对照原SAE架构。
但是网关GW的控制面和用户面分离之后，MME根据现有的切换机制进行的GW选择实际是针对GWC的选择，由GWC负责在其对应的GWU组中进行GWU的选择和管理。结合现有的MME的切换机制，MME收到原eNodeB的切换请求消息后，MME判断SGW不需要改变，即SGwC不改变，将会将当前的SGwU地址和隧道标识下发给新的eNodeB，则新的eNodeB获取到的不一定是最终通过SGWU选择之后的新的SGwU地址和隧道标识，若后续SGwU进行了重选，则上下行数据通道建立错误，从而导致上行数据到达eNodeB后会向原先的SGwU传送，从而导致无法和SGwU连接或是SGwU收到后丢弃，导致无法正确上传。无法保证业务的连续性和数据的完整性。
因此，GW控制面和用户面分离之后，现有MME判断SGW发生改变的机制在部分场景下不能支持数据流的正确可靠的传输，无法保证业务的连续性和完整性。
发明内容
为解决上述技术问题，本发明实施例期望提供一种切换的方法、设备和系统，能够在GW控制面和用户面分离的情况下，支持数据流的可靠传输，保证了业务的连续性和完整性。
本发明的技术方案是这样实现的：
第一方面，本发明实施例提供了一种切换方法，所述方法应用于服务网关S-GW且所述S-GW包括分离的控制面S-GWC和用户面S-GWU，所述方法包括：
所述S-GWC接收由移动管理实体MME传输的S-GW变更标识；其中，所述S-GW变更标识用于指示所述S-GW中的S-GWU改变且所述S-GW中的S-GWC不改变；
所述S-GWC根据所述S-GW变更标识确定更新的S-GWU，并向所述MME发送更新反馈消息；其中，所述更新反馈消息包括更新的S-GWU标识，用于所述MME通知演进基站eNodeB建立与所述更新的S-GWU的数据通道；
所述S-GWC接收由所述MME发送的删除请求，并根据所述删除请求删除更新前的S-GWU；
所述S-GWC将删除完成后的响应消息发送至所述MME。
在上述方案中，所述S-GWC根据所述S-GW变更标识确定更新的S-GWU，包括：
所述S-GWC根据所述S-GW变更标识从自身对应的S-GWU组中选择S-GWU；
所述S-GWC向被选中的S-GWU发送创建用户面请求消息；
所述被选中的S-GWU向S-GWC回复创建用户面响应消息。
在上述方案中，在所述S-GWC根据所述S-GW变更标识确定更新的S-GWU之后，所述方法还包括：
所述S-GWC向分组数据网网关P-GW发送修改承载请求；其中，所述修改承载请求中包括所述更新的S-GWU标识；
所述S-GWC接收所述P-GW发送的修改承载响应。
在上述方案中，所述S-GWC根据所述删除请求删除更新前的S-GWU，具体包括：
所述S-GWC向所述更新前的S-GWU发送删除用户面请求消息；
所述更新前的S-GWU向所述S-GWC回复删除用户面响应消息。
第二方面，本发明实施例提供了一种切换方法，所述方法应用于移动管理实体MME，所述方法包括：
所述MME根据切换指令生成S-GW变更标识，并将S-GW变更标识发送至S-GWC；其中，所述S-GW变更标识用于指示S-GW中的S-GWU改变且所述S-GW中的S-GWC不改变；
所述MME接收由所述S-GWC发送的更新反馈消息；其中，所述更新反馈消息包括更新的S-GWU标识；
所述MME将所述更新的S-GWU标识通知演进基站eNodeB；
所述MME向所述S-GWC发送删除请求；其中，所述删除请求包括需删除的更新前的S-GWU标识；
所述MME接收由所述S-GWC发送的删除完成后的响应消息。
在上述方案中，所述MME接收由所述S-GWC发送的更新反馈消息之后，所述方法还包括：
所述MME向所述S-GWC发送修改承载请求；其中，所述修改承载请求用于指示所述S-GWC通过与分组数据网网关P-GW的交互将承载修改为所述更新的S-GWU；
所述MME接收由所述S-GWC发送的修改承载响应。
第三方面，本发明实施例提供了一种服务网关S-GW，所述S-GW包括分离的控制面S-GWC和用户面S-GWU，所述S-GWC包括：第一接收模块、确定模块、第一发送模块和删除模块；其中，
所述第一接收模块，用于接收由移动管理实体MME传输的S-GW变更标识；其中，所述S-GW变更标识用于指示所述S-GW中的S-GWU改变且所述S-GW中的S-GWC不 改变；
所述确定模块，用于根据所述S-GW变更标识确定更新的S-GWU；
所述第一发送模块，用于向所述MME发送更新反馈消息；其中，所述更新反馈消息包括更新的S-GWU标识，用于所述MME通知演进基站eNodeB建立与所述更新的S-GWU的数据通道；
所述第一接收模块，还用于接收由所述MME发送的删除请求；
所述删除模块，用于根据所述删除请求删除更新前的S-GWU；
所述第一发送模块，还用于将删除完成后的响应消息发送至所述MME。
在上述方案中，所述确定模块，用于：
根据所述S-GW变更标识从自身对应的S-GWU组中选择S-GWU；以及，
向被选中的S-GWU发送创建用户面请求消息；以及，
接收所述被选中的S-GWU向S-GWC回复的创建用户面响应消息。
在上述方案中，所述第一发送模块，还用于向分组数据网网关P-GW发送修改承载请求；其中，所述修改承载请求中包括所述更新的S-GWU标识；
所述第一接收模块，还用于接收所述P-GW发送的修改承载响应。
在上述方案中，所述删除模块，用于：
向所述更新前的S-GWU发送删除用户面请求消息；以及，
接收所述更新前的S-GWU向所述S-GWC回复的删除用户面响应消息。
第四方面，本发明实施例提供了一种移动管理实体MME，所述MME包括生成模块、第二发送模块和第二接收模块；其中，
所述生成模块，用于根据切换指令生成S-GW变更标识；
所述第二发送模块，用于将S-GW变更标识发送至S-GWC；其中，所述S-GW变更标识用于指示S-GW中的S-GWU改变且所述S-GW中的S-GWC不改变；
所述第二接收模块，用于接收由所述S-GWC发送的更新反馈消息；其中，所述更新反馈消息包括更新的S-GWU标识；
所述第二发送模块，用于将所述更新的S-GWU标识通知演进基站eNodeB；
以及，向所述S-GWC发送删除请求；其中，所述删除请求包括需删除的更新前的S-GWU标识；
所述第二接收模块，用于接收由所述S-GWC发送的删除完成后的响应消息。
在上述方案中，所述第二发送模块，还用于向所述S-GWC发送修改承载请求；其中， 所述修改承载请求用于指示所述S-GWC通过与分组数据网网关P-GW的交互将承载修改为所述更新的S-GWU；
所述第二接收模块，还用于接收由所述S-GWC发送的修改承载响应。
第五方面，本发明实施例提供了一种切换的系统，所述系统包括：具有分离的控制面S-GWC和用户面S-GWU的服务网关S-GW、移动管理实体MME及演进基站eNodeB；其中，
所述S-GWC，用于接收由所述MME传输的S-GW变更标识；其中，所述S-GW变更标识用于指示所述S-GW中的S-GWU改变且所述S-GW中的S-GWC不改变；以及，
根据所述S-GW变更标识确定更新的S-GWU，并向所述MME发送更新反馈消息；其中，所述更新反馈消息包括更新的S-GWU标识，用于所述MME通知演进基站eNodeB建立与所述更新的S-GWU的数据通道；以及，
接收由所述MME发送的删除请求，并根据所述删除请求删除更新前的S-GWU；以及，
将删除完成后的响应消息发送至所述MME；
所述MME，用于根据切换指令生成S-GW变更标识，并将S-GW变更标识发送至S-GWC；其中，所述S-GW变更标识用于指示S-GW中的S-GWU改变且所述S-GW中的S-GWC不改变；
以及，接收由所述S-GWC发送的更新反馈消息；其中，所述更新反馈消息包括更新的S-GWU标识；
以及，将所述更新的S-GWU标识通知所述eNodeB；
以及，向所述S-GWC发送删除请求；其中，所述删除请求包括需删除的更新前的S-GWU标识；
以及，接收由所述S-GWC发送的删除完成后的响应消息。
本发明实施例提供了一种切换的方法、设备和系统，S-GWC根据MME发送的S-GW变更标识对S-GWU进行选择之后，将更新的S-GWU反馈至MME，从而使MME向网络架构中的其他网元通知更新的S-GWU，使得其他网元及时地对S-GWU进行更新，从而可以让其他网元与S-GW进行用户面数据的交互时，通过更新的S-GWU进行交互，保证了用户面数据正确及可靠的传输，也保证业务的连续性和完整性。
附图说明
图1为现有技术提供的一种SAE网络架构示意图；
图2为现有技术提供的一种GW的控制面和用户面分离情况下的SAE网络架构示意图；
图3为本发明实施例提供的一种应用于S-GW的切换的方法流程示意图；
图4为本发明实施例提供的一种确定更新的S-GWU的流程示意图；
图5为本发明实施例提供的一种修改承载的流程示意图；
图6为本发明实施例提供的一种删除更新前的S-GWU的流程示意图；
图7为本发明实施例提供的一种应用于MME的切换的方法流程示意图；
图8为本发明实施例提供的另一种修改承载的流程示意图；
图9为本发明实施例提供的一种切换的具体实现过程示意图；
图10为本发明实施例提供的另一种切换的具体实现过程示意图；
图11为本发明实施例提供的又一种切换的具体实现过程示意图；
图12为本发明实施例提供的一种S-GW的结构示意图；
图13为本发明实施例提供的一种MME的结构示意图；
图14为本发明实施例提供的一种切换的系统结构示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述。
实施例一
参见图3，其示出了本发明实施例提供的一种应用于服务网关S-GW的切换的方法流程，该方法中的服务网关S-GW包括分离的控制面S-GWC和用户面S-GWU，该方法可以包括：
S301：S-GWC接收由MME传输的S-GW变更标识；
其中，所述S-GW变更标识用于指示所述S-GW中的S-GWU改变且所述S-GW中的S-GWC不改变。
在具体实现中，如图2所示，所述S-GW的控制面S-GWC与所述MME连接，并通过S11接口进行数据交互。
需要说明的是，由MME在接收到其他网元，如无线接入网元eNodeB发送的路径切换请求消息或者接收到用户发送的跟踪区更新消息之后，通过确认S-GW中的S-GWC没 有发生改变但S-GWU发生改变时，将S-GW变更标识封装于向S-GWC发送的创建会话请求中。
S302：S-GWC根据所述S-GW变更标识确定更新的S-GWU，并向所述MME发送更新反馈消息；
其中，所述更新反馈消息包括更新的S-GWU标识，用于所述MME通知eNodeB建立与所述更新的S-GWU的数据通道。对应于S301中的创建会话请求，更新反馈消息可以封装于创建会话响应中。
示例性地，如图4所示，S-GWC根据所述S-GW变更标识确定更新的S-GWU，可以包括：
S401：S-GWC根据所述S-GW变更标识从自身对应的S-GWU组中选择S-GWU；
S402：S-GWC向被选中的S-GWU发送创建用户面请求消息；
S403：被选中的S-GWU向S-GWC回复创建用户面响应消息。
示例性地，在S-GWC根据所述S-GW变更标识确定更新的S-GWU之后，如图5所示，本方法还可以包括S501和S502：
S501：S-GWC向分组数据网网关P-GW发送修改承载请求；其中，修改承载请求中包括更新的S-GWU标识；
S502：S-GWC接收P-GW发送的修改承载响应。
从而完成P-GW根据更新的S-GWU标识更改数据承载。
需要说明的是，S501及S502通常在S-GWC根据所述S-GW变更标识确定更新的S-GWU之后执行，而执行的顺序本发明实施例不作具体限定。可选地，可以在S306之后，通过MME发起修改承载请求之后来执行，相对应地，S502后，S-GWC还需要针对MME发起的修改承载请求来MME返回修改承载响应，本实施例对此不做赘述。
S303：S-GWC接收由所述MME发送的删除请求，并根据所述删除请求删除更新前的S-GWU；
其中，所述删除请求包括需删除的更新前的S-GWU标识。
示例性地，如图6所示，S-GWC根据所述删除请求删除更新前的S-GWU，具体可以包括S601至S602：
S601：S-GWC向更新前的S-GWU发送删除用户面请求消息；
S602：更新前的S-GWU向S-GWC回复删除用户面响应消息。
通过上述两个步骤，可以将更新前的S-GWU从S-GWC中删除，此时，S-GWC当前 对应的S-GWU即是更新的S-GWU。
S304：S-GWC将删除完成后的响应消息发送至所述MME。
需要说明的是，在MME接收到删除完成后的响应消息之后，可以确认此后SAE架构中的网元与S-GW之间的数据传输，用户面相关数据是通过更新的S-GWU进行传输和交互。
本实施例提供了一种应用于控制面与用户面分离的服务网关S-GW切换的方法，S-GWC根据MME发送的S-GW变更标识对S-GWU进行选择之后，将更新的S-GWU反馈至MME，从而使MME向网络架构中的其他网元通知更新的S-GWU，使得其他网元及时地对S-GWU进行更新，从而可以让其他网元与S-GW进行用户面数据的交互时，通过更新的S-GWU进行交互，保证了用户面数据正确及可靠的传输，也保证业务的连续性和完整性。
实施例二
参见图7，其示出了本发明实施例提供的一种应用于移动管理实体MME的切换的方法流程，该方法可以包括：
S701：MME根据切换指令生成S-GW变更标识，并将S-GW变更标识发送至S-GWC；
其中，所述S-GW变更标识用于指示所述S-GW中的S-GWU改变且所述S-GW中的S-GWC不改变。
需要说明的是，在本实施例中，MME的对端为控制面与用户面分离的服务网关S-GW；在具体实现中，所述MME与所述S-GW的控制面S-GWC连接，并通过S11接口进行数据交互。
在具体实现过程中，MME根据切换指令可以确定S-GWC不改变，并根据UE发送的当前位置信息，如跟踪区(TA，Tracking Area)信息来确定S-GWU发生改变，从而生成S-GW变更标识。
可以理解地，MME可以将S-GW变更标识封装于向S-GWC发送的创建会话请求中。
S702：MME接收由S-GWC发送的更新反馈消息；
其中，所述更新反馈消息包括更新的S-GWU标识。对应于S701中的创建会话请求，更新反馈消息可以封装于创建会话响应中。
需要说明的是，MME接收由S-GWC发送的更新反馈消息之后，优选地，如图8所示，本方法还可以包括S801和S802：
S801：MME向S-GWC发送修改承载请求；
需要说明的是，该修改承载请求用于指示S-GWC通过与P-GW的交互将承载修改为更新的S-GWU。
S802：MME接收由S-GWC发送的修改承载响应。
可以理解地，S801及S802是通过MME向S-GWC发送请求来进行数据承载的修改，在具体实现过程中，MME也可以无需向S-GWC发送修改承载请求，S-GWC也会在确定更新的S-GWU之后自行与P-GW进行交互，来实现数据承载的修改。
S703：MME将所述更新的S-GWU标识通知eNodeB；
可以理解地，当MME将所述更新的S-GWU标识通知eNodeB之后，eNodeB就会将自身与S-GW进行连接的S-GWU变更为更新的S-GWU，从而后续可以与更新的S-GWU进行用户面的数据交互。
S704：MME向S-GWC发送删除请求；
其中，所述删除请求包括需删除的更新前的S-GWU标识。
S705：MME接收由S-GWC发送的删除完成后的响应消息。
需要说明的是，在MME接收到删除完成后的响应消息之后，可以确认此后SAE架构中的网元与S-GW之间的数据传输，用户面相关数据是通过更新的S-GWU进行传输和交互。
本实施例提供了一种应用于MME的切换方法，通过MME向S-GWC发送S-GW变更标识，使得S-GWC对S-GWU进行更新，并且MME向网络架构中的其他网元通知更新的S-GWU，使得其他网元及时地对S-GWU进行更新，从而可以让其他网元与S-GW进行用户面数据的交互时，通过更新的S-GWU进行交互，保证了用户面数据正确及可靠的传输，也保证业务的连续性和完整性。
实施例三
基于实施例一和实施例二相同的技术构思，参见图9，其示出了本发明实施例提供的一种切换的具体实现过程，在本实施例中，以用户设备UE的移动产生位置变化从而导致跟踪区TA更新为例进行说明，具体过程可以包括：
S901：UE发送跟踪区更新消息；
S902：MME根据跟踪区更新消息确定S-GW中的S-GWU改变且所述S-GW中的S-GWC不改变；
S903：MME向S-GWC发送创建会话请求；
其中，创建会话请求中包括了用于指示S-GW中的S-GWU改变且S-GW中的S-GWC 不改变的S-GW变更标识。
S904：S-GWC根据S-GW变更标识从自身对应的S-GWU组中选择S-GWU；
可以理解地，被选中的S-GWU即是更新的S-GWU。
S905：S-GWC向被选中的S-GWU发送创建用户面请求消息；
S906：被选中的S-GWU向S-GWC回复创建用户面响应消息；
S907：S-GWC向分组数据网网关P-GW发送修改承载请求；
其中，修改承载请求中包括更新的S-GWU标识；
S908：P-GW向S-GWC发送修改承载响应；
S909：S-GWC向MME发送创建会话响应；
其中，创建会话响应封装有更新反馈消息，而更新反馈消息包括更新的S-GWU标识。
S910：MME向eNodeB通知更新的S-GWU标识；
S911：进行跟踪区更新的其他流程处理；
S912：MME向S-GWC发送删除请求；
其中，删除请求中包括需删除的更新前的S-GWU标识；
S913：S-GWC向更新前的S-GWU发送删除用户面请求消息；
S914：更新前的S-GWU向S-GWC回复删除用户面响应消息；
S915：S-GWC将删除完成后的响应消息发送至MME。
在MME接收到删除完成后的响应消息之后，可以确认此后SAE架构中的网元与S-GW之间的数据传输，用户面相关数据是通过更新的S-GWU进行传输和交互。
本实施例提供了一种切换的方法具体实现过程，S-GWC根据MME发送的S-GW变更标识对S-GWU进行选择之后，将更新的S-GWU反馈至MME，从而使MME向网络架构中的其他网元通知更新的S-GWU，使得其他网元及时地对S-GWU进行更新，从而可以让其他网元与S-GW进行用户面数据的交互时，通过更新的S-GWU进行交互，保证了用户面数据正确及可靠的传输，也保证业务的连续性和完整性。
实施例四
基于实施例一和实施例二相同的技术构思，参见图10，其示出了本发明实施例提供的一种切换的具体实现过程，在本实施例中，以S-GWU改变的S1接口切换为例进行说明，具体过程可以包括：
S1001：无线接入网元向MME发送切换请求消息；
S1002：MME根据切换请求确定S-GWC地址不变化，且根据UE当前位置，如跟踪 区(TA，Tracking Area)确定S-GWU改变；
S1003：MME向S-GWC发送创建会话请求；
其中，创建会话请求中包括了用于指示S-GW中的S-GWU改变且S-GW中的S-GWC不改变的S-GW变更标识。
S1004：S-GWC根据S-GW变更标识从自身对应的S-GWU组中选择S-GWU；
可以理解地，被选中的S-GWU即是更新的S-GWU。
S1005：S-GWC向被选中的S-GWU发送创建用户面请求消息；
S1006：被选中的S-GWU向S-GWC回复创建用户面响应消息；
S1007：S-GWC向MME发送创建会话响应；
其中，创建会话响应封装有更新反馈消息，而更新反馈消息包括更新的S-GWU标识。
S1008：MME向eNodeB通知更新的S-GWU标识；
S1009：进行切换的其他流程处理；
S1010：MME向S-GwC发送第一修改承载请求；
S1011：S-GWC向分组数据网网关P-GW发送第二修改承载请求；
其中，第二修改承载请求中包括更新的S-GWU标识；
S1012：P-GW向S-GWC发送第二修改承载响应；
S1013：S-GWC向MME发送第一修改承载响应；
S1014：MME向S-GWC发送删除请求；
其中，删除请求中包括需删除的更新前的S-GWU标识；
S1015：S-GWC向更新前的S-GWU发送删除用户面请求消息；
S1016：更新前的S-GWU向S-GWC回复删除用户面响应消息；
S1017：S-GWC将删除完成后的响应消息发送至MME；
S1018：进行切换的其他流程处理。
本实施例提供了另一种切换的方法具体实现过程，S-GWC根据MME发送的S-GW变更标识对S-GWU进行选择之后，将更新的S-GWU反馈至MME，从而使MME向网络架构中的其他网元通知更新的S-GWU，使得其他网元及时地对S-GWU进行更新，从而可以让其他网元与S-GW进行用户面数据的交互时，通过更新的S-GWU进行交互，保证了用户面数据正确及可靠的传输，也保证业务的连续性和完整性。
实施例五
基于实施例一和实施例二相同的技术构思，参见图11，其示出了本发明实施例提供 的一种切换的具体实现过程，在本实施例中，以S-GWU改变的路径切换为例进行说明，具体过程可以包括：
S1101：无线接入网元向MME发送路径切换请求消息；
S1102：MME根据切换请求确定S-GWC地址不变化，且根据UE当前位置，如跟踪区(TA，Tracking Area)确定S-GWU改变；
S1103：MME向S-GWC发送创建会话请求；
其中，创建会话请求中包括了用于指示S-GW中的S-GWU改变且S-GW中的S-GWC不改变的S-GW变更标识。
S1104：S-GWC根据S-GW变更标识从自身对应的S-GWU组中选择S-GWU；
可以理解地，被选中的S-GWU即是更新的S-GWU。
S1105：S-GWC向被选中的S-GWU发送创建用户面请求消息；
S1106：被选中的S-GWU向S-GWC回复创建用户面响应消息；
S1107：S-GWC向分组数据网网关P-GW发送修改承载请求；
其中，修改承载请求中包括更新的S-GWU标识；
S1108：P-GW向S-GWC发送修改承载响应；
S1109：S-GWC向MME发送创建会话响应；
其中，创建会话响应封装有更新反馈消息，而更新反馈消息包括更新的S-GWU标识。
S1110：MME向eNodeB通知更新的S-GWU标识；
S1111：进行路径切换的其他流程处理；
S1112：MME向S-GWC发送删除请求；
其中，删除请求中包括需删除的更新前的S-GWU标识；
S1113：S-GWC向更新前的S-GWU发送删除用户面请求消息；
S1114：更新前的S-GWU向S-GWC回复删除用户面响应消息；
S1115：S-GWC将删除完成后的响应消息发送至MME。
本实施例提供了又一种切换的方法具体实现过程，S-GWC根据MME发送的S-GW变更标识对S-GWU进行选择之后，将更新的S-GWU反馈至MME，从而使MME向网络架构中的其他网元通知更新的S-GWU，使得其他网元及时地对S-GWU进行更新，从而可以让其他网元与S-GW进行用户面数据的交互时，通过更新的S-GWU进行交互，保证了用户面数据正确及可靠的传输，也保证业务的连续性和完整性。
实施例六
基于前述实施例相同的技术构思，参见图12，示出了本发明实施例提供的一种S-GW120的结构，该S-GW 120可以包括分离的控制面S-GWC 1201和用户面S-GWU 1202，该S-GWC 1201包括：第一接收模块12011、确定模块12012、第一发送模块12013和删除模块12014；其中，
所述第一接收模块12011，用于接收由移动管理实体MME传输的S-GW变更标识；其中，所述S-GW变更标识用于指示所述S-GW中的S-GWU改变且所述S-GW中的S-GWC不改变；
所述确定模块12012，用于根据所述S-GW变更标识确定更新的S-GWU；
所述第一发送模块12013，用于向所述MME发送更新反馈消息；其中，所述更新反馈消息包括更新的S-GWU标识，用于所述MME通知演进基站eNodeB建立与所述更新的S-GWU的数据通道；
所述第一接收模块12011，还用于接收由所述MME发送的删除请求；
所述删除模块12014，用于根据所述删除请求删除更新前的S-GWU；
所述第一发送模块12013，还用于将删除完成后的响应消息发送至所述MME。
在上述方案中，所述确定模块12012，用于：
根据所述S-GW变更标识从自身对应的S-GWU组中选择S-GWU；以及，
向被选中的S-GWU发送创建用户面请求消息；以及，
接收所述被选中的S-GWU回复的创建用户面响应消息。
在上述方案中，所述第一发送模块12013，还用于向分组数据网网关P-GW发送修改承载请求；其中，所述修改承载请求中包括所述更新的S-GWU标识；
所述第一接收模块12011，还用于接收所述P-GW发送的修改承载响应。
在上述方案中，所述删除模块12014，用于：
向所述更新前的S-GWU发送删除用户面请求消息；以及，
接收所述更新前的S-GWU向所述S-GWC回复的删除用户面响应消息。
实施例七
基于前述实施例相同的技术构思，参见图13，其示出了本发明实施例提供的一种MME130，可以包括：生成模块1301、第二发送模块1302和第二接收模块1303；其中，
所述生成模块1301，用于根据切换指令生成S-GW变更标识；
所述第二发送模块1302，用于将S-GW变更标识发送至S-GWC；其中，所述S-GW变更标识用于指示S-GW中的S-GWU改变且所述S-GW中的S-GWC不改变；
所述第二接收模块1303，用于接收由所述S-GWC发送的更新反馈消息；其中，所述更新反馈消息包括更新的S-GWU标识；
所述第二发送模块1302，用于将所述更新的S-GWU标识通知演进基站eNodeB；
以及，向所述S-GWC发送删除请求；其中，所述删除请求包括需删除的更新前的S-GWU标识；
所述第二接收模块1303，用于接收由所述S-GWC发送的删除完成后的响应消息。
在上述方案中，所述第二发送模块1302，还用于向所述S-GWC发送修改承载请求；其中，所述修改承载请求用于指示所述S-GWC通过与分组数据网网关P-GW的交互将承载修改为所述更新的S-GWU；
所述第二接收模块1303，还用于接收由所述S-GWC发送的修改承载响应。
实施例八
基于前述实施例相同的技术构思，参见图14，其示出了本发明实施例提供的一种切换的系统140，该系统可以包括：具有分离的控制面S-GWC 1201和用户面S-GWU 1202的服务网关S-GW、移动管理实体MME 130及演进基站eNodeB 150；其中，
所述S-GWC 1201，用于接收由所述MME 130传输的S-GW变更标识；其中，所述S-GW变更标识用于指示所述S-GW中的S-GWU改变且所述S-GW中的S-GWC不改变；以及，
根据所述S-GW变更标识确定更新的S-GWU，并向所述MME发送更新反馈消息；其中，所述更新反馈消息包括更新的S-GWU标识，用于所述MME 130通知演进基站eNodeB 150建立与所述更新的S-GWU的数据通道；以及，
接收由所述MME130发送的删除请求，并根据所述删除请求删除更新前的S-GWU；以及，
将删除完成后的响应消息发送至所述MME130；
所述MME130，用于根据切换指令生成S-GW变更标识，并将S-GW变更标识发送至S-GWC；其中，所述S-GW变更标识用于指示S-GW中的S-GWU改变且所述S-GW中的S-GWC不改变；
以及，接收由所述S-GWC发送的更新反馈消息；其中，所述更新反馈消息包括更新的S-GWU标识；
以及，将所述更新的S-GWU标识通知所述eNodeB 150；
以及，向所述S-GWC发送删除请求；其中，所述删除请求包括需删除的更新前的 S-GWU标识；
以及，接收由所述S-GWC发送的删除完成后的响应消息。
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、系统、或计算机程序产品。因此，本发明可采用硬件实施例、软件实施例、或结合软件和硬件方面的实施例的形式。而且，本发明可采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质(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(系统)、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。
以上所述，仅为本发明的较佳实施例而已，并非用于限定本发明的保护范围。
工业实用性
本申请的技术方案可以适用于无线通信技术领域。S-GWC根据MME发送的S-GW变更标识对S-GWU进行选择之后，将更新的S-GWU反馈至MME，从而使MME向网络架构中的其他网元通知更新的S-GWU，使得其他网元及时地对S-GWU进行更新，从而可以让其他网元与S-GW进行用户面数据的交互时，通过更新的S-GWU进行交互，保证了用户面数据正确及可靠的传输，也保证业务的连续性和完整性。

Claims (13)

  1. 一种切换方法，其中，所述方法应用于服务网关S-GW且所述S-GW包括分离的控制面S-GWC和用户面S-GWU，所述方法包括：
    所述S-GWC接收由移动管理实体MME传输的S-GW变更标识；其中，所述S-GW变更标识用于指示所述S-GW中的S-GWU改变且所述S-GW中的S-GWC不改变；
    所述S-GWC根据所述S-GW变更标识确定更新的S-GWU，并向所述MME发送更新反馈消息；其中，所述更新反馈消息包括更新的S-GWU标识，用于所述MME通知演进基站eNodeB建立与所述更新的S-GWU的数据通道；
    所述S-GWC接收由所述MME发送的删除请求，并根据所述删除请求删除更新前的S-GWU；
    所述S-GWC将删除完成后的响应消息发送至所述MME。
  2. 根据权利要求1所述的方法，其中，所述S-GWC根据所述S-GW变更标识确定更新的S-GWU，包括：
    所述S-GWC根据所述S-GW变更标识从自身对应的S-GWU组中选择S-GWU；
    所述S-GWC向被选中的S-GWU发送创建用户面请求消息；
    所述被选中的S-GWU向S-GWC回复创建用户面响应消息。
  3. 根据权利要求1所述的方法，其中，在所述S-GWC根据所述S-GW变更标识确定更新的S-GWU之后，所述方法还包括：
    所述S-GWC向分组数据网网关P-GW发送修改承载请求；其中，所述修改承载请求中包括所述更新的S-GWU标识；
    所述S-GWC接收所述P-GW发送的修改承载响应。
  4. 根据权利要求1所述的方法，其中，所述S-GWC根据所述删除请求删除更新前的S-GWU，包括：
    所述S-GWC向所述更新前的S-GWU发送删除用户面请求消息；
    所述更新前的S-GWU向所述S-GWC回复删除用户面响应消息。
  5. 一种切换方法，其中，所述方法应用于移动管理实体MME，所述方法包括：
    所述MME根据切换指令生成S-GW变更标识，并将S-GW变更标识发送至S-GWC；其中，所述S-GW变更标识用于指示S-GW中的S-GWU改变且所述S-GW中的S-GWC不改变；
    所述MME接收由所述S-GWC发送的更新反馈消息；其中，所述更新反馈消息包括 更新的S-GWU标识；
    所述MME将所述更新的S-GWU标识通知演进基站eNodeB；
    所述MME向所述S-GWC发送删除请求；其中，所述删除请求包括需删除的更新前的S-GWU标识；
    所述MME接收由所述S-GWC发送的删除完成后的响应消息。
  6. 根据权利要求5所述的方法，其中，所述MME接收由所述S-GWC发送的更新反馈消息之后，所述方法还包括：
    所述MME向所述S-GWC发送修改承载请求；其中，所述修改承载请求用于指示所述S-GWC通过与分组数据网网关P-GW的交互将承载修改为所述更新的S-GWU；
    所述MME接收由所述S-GWC发送的修改承载响应。
  7. 一种服务网关S-GW，其中，所述S-GW包括分离的控制面S-GWC和用户面S-GWU，所述S-GWC包括：第一接收模块、确定模块、第一发送模块和删除模块；其中，
    所述第一接收模块，设置为接收由移动管理实体MME传输的S-GW变更标识；其中，所述S-GW变更标识用于指示所述S-GW中的S-GWU改变且所述S-GW中的S-GWC不改变；
    所述确定模块，设置为根据所述S-GW变更标识确定更新的S-GWU；
    所述第一发送模块，设置为向所述MME发送更新反馈消息；其中，所述更新反馈消息包括更新的S-GWU标识，用于所述MME通知演进基站eNodeB建立与所述更新的S-GWU的数据通道；
    所述第一接收模块，还设置为接收由所述MME发送的删除请求；
    所述删除模块，设置为根据所述删除请求删除更新前的S-GWU；
    所述第一发送模块，还设置为将删除完成后的响应消息发送至所述MME。
  8. 根据权利要求7所述的S-GW，其中，所述确定模块设置为：
    根据所述S-GW变更标识从自身对应的S-GWU组中选择S-GWU；以及，
    向被选中的S-GWU发送创建用户面请求消息；以及，
    接收所述被选中的S-GWU向S-GWC回复的创建用户面响应消息。
  9. 根据权利要求7所述的S-GW，其中，所述第一发送模块，还设置为向分组数据网网关P-GW发送修改承载请求；其中，所述修改承载请求中包括所述更新的S-GWU标识；
    所述第一接收模块，还设置为接收所述P-GW发送的修改承载响应。
  10. 根据权利要求7所述的S-GW，其中，所述删除模块设置为：
    向所述更新前的S-GWU发送删除用户面请求消息；以及，
    接收所述更新前的S-GWU向所述S-GWC回复的删除用户面响应消息。
  11. 一种移动管理实体MME，其中，所述MME包括生成模块、第二发送模块和第二接收模块；其中，
    所述生成模块，设置为根据切换指令生成S-GW变更标识；
    所述第二发送模块，设置为将S-GW变更标识发送至S-GWC；其中，所述S-GW变更标识用于指示S-GW中的S-GWU改变且所述S-GW中的S-GWC不改变；
    所述第二接收模块，设置为接收由所述S-GWC发送的更新反馈消息；其中，所述更新反馈消息包括更新的S-GWU标识；
    所述第二发送模块，设置为将所述更新的S-GWU标识通知演进基站eNodeB；
    以及，向所述S-GWC发送删除请求；其中，所述删除请求包括需删除的更新前的S-GWU标识；
    所述第二接收模块，设置为接收由所述S-GWC发送的删除完成后的响应消息。
  12. 根据权利要求11所述的MME，其中，所述第二发送模块，还设置为向所述S-GWC发送修改承载请求；其中，所述修改承载请求用于指示所述S-GWC通过与分组数据网网关P-GW的交互将承载修改为所述更新的S-GWU；
    所述第二接收模块，还设置为接收由所述S-GWC发送的修改承载响应。
  13. 一种切换的系统，其中，所述系统包括：具有分离的控制面S-GWC和用户面S-GWU的服务网关S-GW、移动管理实体MME及演进基站eNodeB；其中，
    所述S-GWC，设置为接收由所述MME传输的S-GW变更标识；其中，所述S-GW变更标识用于指示所述S-GW中的S-GWU改变且所述S-GW中的S-GWC不改变；以及，
    根据所述S-GW变更标识确定更新的S-GWU，并向所述MME发送更新反馈消息；其中，所述更新反馈消息包括更新的S-GWU标识，用于所述MME通知演进基站eNodeB建立与所述更新的S-GWU的数据通道；以及，
    接收由所述MME发送的删除请求，并根据所述删除请求删除更新前的S-GWU；以及，
    将删除完成后的响应消息发送至所述MME；
    所述MME，设置为根据切换指令生成S-GW变更标识，并将S-GW变更标识发送至S-GWC；其中，所述S-GW变更标识用于指示S-GW中的S-GWU改变且所述S-GW中 的S-GWC不改变；
    以及，接收由所述S-GWC发送的更新反馈消息；其中，所述更新反馈消息包括更新的S-GWU标识；
    以及，将所述更新的S-GWU标识通知所述eNodeB；
    以及，向所述S-GWC发送删除请求；其中，所述删除请求包括需删除的更新前的S-GWU标识；
    以及，接收由所述S-GWC发送的删除完成后的响应消息。
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CN101360331A (zh) * 2007-08-02 2009-02-04 华为技术有限公司 一种服务网关信息更新方法、系统及装置
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