WO2009143781A1 - 一种sr vcc业务切换处理方法及设备 - Google Patents

一种sr vcc业务切换处理方法及设备 Download PDF

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Publication number
WO2009143781A1
WO2009143781A1 PCT/CN2009/072033 CN2009072033W WO2009143781A1 WO 2009143781 A1 WO2009143781 A1 WO 2009143781A1 CN 2009072033 W CN2009072033 W CN 2009072033W WO 2009143781 A1 WO2009143781 A1 WO 2009143781A1
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Prior art keywords
user equipment
management entity
mobility management
network
identifier
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PCT/CN2009/072033
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English (en)
French (fr)
Inventor
孙晓姬
袁立平
吴问付
陈中平
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华为技术有限公司
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Publication of WO2009143781A1 publication Critical patent/WO2009143781A1/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
    • H04W36/0022Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
    • H04W36/00224Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W80/00Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/08Upper layer protocols
    • H04W80/10Upper layer protocols adapted for application session management, e.g. SIP [Session Initiation Protocol]

Definitions

  • the present invention relates to the field of communication applications, and in particular, to a SR VCC service switching processing method and device. Background technique
  • the system architecture diagram is shown in Figure 1. It includes the evolved Universal Mobile Telecommunications System (UMTS) terrestrial radio access network (E - UTRAN, Evolved UMTS Terrestrial Radio Access Network), which is used to implement all functions related to the evolution network wireless; MME, Mobility Management Entity, responsible for control plane mobility management, including user context and mobile state management, Assigning a user temporary identity, etc.; Serving Gateway (SGW) is a user plane anchor between 3GPP access networks, terminating the E-TURAN interface; Packet Data Network Gateway (PGW) is User plane anchor between 3GPP access network and non-3GPP access network, terminating interface with external packet data network (PDN).
  • the Policy and Charging Rule Function (PCRF) is used for policy control decisions and flow accounting control functions.
  • the Home Subscriber Server (HSS) is used to store user subscription information.
  • FIG 2 shows the architecture of the existing single access system voice continuity (SR VCC, Single Radio VCC) system.
  • SR VCC single Radio VCC
  • S- IWF Mobile Switching Centre
  • IMSC IP Multimedia Subsystem
  • LTE long-term evolution
  • GERAN GSM/EDGE Radio Access Network
  • UTRAN UMTS Radio Access Network
  • the voice service is switched to the EUTRAN network and the voice continuity is ensured. If the network resource of the user still exists in the LTE network, the network side does not need to re-allocate the network side resources for the user during the handover process, and the IMSC receives the source side. After the handover request, the source side GERAN/UTRAN network target side resource preparation is notified.
  • the embodiment of the present invention provides an SR VCC service switching processing method and device.
  • the SR VCC service switching is completed according to the situation in which the target side network determines the network resources of the user equipment.
  • the embodiment of the present invention provides an SR VCC service switching processing method, where the method includes:
  • the SR VCC service switching is performed for the user equipment according to the result of determining whether the network resource of the user equipment exists.
  • the embodiment of the present invention further provides a mobile switching center, including:
  • a first receiving module configured to receive, by the GERAN/UTRAN network, to switch to the user equipment
  • a determining module configured to determine, according to the handover preparation request and the mobility management entity information received by the first receiving module, whether a network resource of the user equipment exists in the EUTRAN network;
  • the switching module is configured to perform SR VCC service switching according to a result of the determining module determining whether the network resource of the user equipment exists.
  • the embodiment of the present invention further provides a mobility management entity, including:
  • a first receiving module configured to receive registration indication information or circuit domain registration information sent by the user equipment
  • the registration module is configured to register the mobility management entity identifier and/or the user equipment identifier with the mobile switching center according to the registration information received by the first receiving module.
  • the embodiment of the present invention further provides a user equipment, including:
  • a sending unit configured to send the indication information to the mobility management entity, where the indication information carries a mobile management entity identifier and/or a user equipment identifier, and is used to instruct the mobility management entity to register with the mobile switching center.
  • the embodiment of the present invention is implemented by the method and the device provided in the embodiment of the present invention.
  • the target side network is determined.
  • the network resource of the user equipment is disconnected from the user equipment, and the SR VCC service is switched for the user equipment according to the result of the judgment.
  • the network resource judgment in the EUTRAN network is completed by using the foregoing method, and the user is judged whether there is a user.
  • different processing methods are adopted at the time of switching, the message interaction is reduced, the handover delay is reduced, and the voice continuity of the user equipment can also be ensured.
  • Figure 1 is a schematic diagram of an existing SAE system architecture
  • FIG. 2 is a structural diagram of a conventional SR VCC system
  • FIG. 3 is a first flowchart of an SR VCC service switching processing method in an embodiment of the present invention
  • FIG. 4 is a second flowchart of an SR VCC service switching processing method in an embodiment of the present invention
  • the third flowchart of the SR VCC service switching processing method is shown in FIG. 6 is a fourth flowchart of the SR VCC service switching processing method in the embodiment of the present invention
  • FIG. 7 is the SR VCC service switching processing method in the embodiment of the present invention.
  • FIG. 8 is a sixth flowchart of the SR VCC service switching processing method in the embodiment of the present invention;
  • FIG. 6 is a fourth flowchart of the SR VCC service switching processing method in the embodiment of the present invention
  • FIG. 7 is the SR VCC service switching processing method in the embodiment of the present invention.
  • FIG. 8 is a sixth flowchart of the SR VCC service switching processing method in the embodiment of the present invention
  • FIG. 9 is a seventh flowchart of the SR VCC service switching processing method in the embodiment of the present invention.
  • the eighth flowchart of the SR VCC service switching processing method in the embodiment of the present invention is a ninth flowchart of the SR VCC service switching processing method in the embodiment of the present invention
  • FIG. 12 is an SR VCC in the embodiment of the present invention.
  • the tenth flowchart of the service switching processing method is a first flowchart of the SR VCC service switching processing method in the embodiment of the present invention.
  • FIG. 14 is a system structural diagram of a method for processing an SR VCC service in the embodiment of the present invention
  • FIG. 15 is a schematic structural diagram of a mobile switching center according to an embodiment of the present invention
  • 16 is a schematic structural diagram of a determining module in an embodiment of the present invention.
  • FIG. 17 is a schematic structural diagram of a switching module in an embodiment of the present invention.
  • 18 is a schematic structural diagram of an obtaining module in an embodiment of the present invention
  • 19 is a schematic structural diagram of a mobility management entity in an embodiment of the present invention
  • 20 is another schematic structural diagram of a mobility management entity in an embodiment of the present invention.
  • FIG. 21 is a schematic structural diagram of a user equipment in an embodiment of the present invention. detailed description
  • the embodiment of the invention provides a SR VCC service switching processing method and device.
  • the user equipment When the user equipment is ready to switch to the EUTRAN network by the GERAN/UTRAN network, it is determined whether the network resources of the user equipment exist on the target side network to complete the SR VCC service switching.
  • the S-IWF or the IMSC is an intermediate function entity for the UE to perform voice handover between the two networks, and it contacts the source side network and the target side network.
  • the MME information is registered in the S-IWF or the IMSC.
  • the MME actively cancels the registration in the S-IWF or MME information in the IMSC; when the S-IWF or the IMSC of the serving UE changes, the MME information needs to be notified to the S-IWF or the IMSC of the serving UE in time.
  • the S-IWF or the IMSC determines whether the UE's network resources exist in the target EUTRAN network by determining whether the UE's serving MME information exists. If the MME information exists in the S-IWF or the IMSC, or the S-IWF or the IMSC sends a bearer query request to the MME, and the queried EUTRAN network has the user's network resources, it indicates that the EUTRAN network has the UE's network resources, and vice versa. Internet resources.
  • the S-IWF or the IMSC can know whether the UE has network resources in the EUTRAN network, and thus the handover is performed.
  • Different processing methods are used to reduce message interaction and reduce switching delay.
  • the S-IWF/IMSC described in the text represents an S-IWF or an IMSC
  • the MME identifier or the SIWF/IMSC identifier is involved, and the identifier may be an address or an alias, which is not limited herein.
  • the MSC mentioned here may refer to an IMSC or a normal MSC.
  • FIG. 3 is a first flowchart of a method for processing an SR VCC service in the embodiment of the present invention.
  • the flowchart is implemented, if the network resource of the user does not exist in the EUTRAN network, when the user equipment (UE) is used by the GERAN When the UTRAN network is switched to the EUTRAN network, the SIWF/IMSC needs to indicate that the UE re-attaches to establish the UE's bearer resources in the EUTRAN network during the handover process to complete the SR VCC handover process.
  • the specific steps are as follows:
  • Step S101 The UE reports a measurement report (measurement report);
  • Step S102 The GERAN/UTRAN decides to initiate a handover according to the measurement report reported by the UE, and sends a handover request (HO Required) to the source MSC.
  • Step S103 The source mobile switching center (MSC) sends a handover preparation request (Prepare Sub Ho Request) to the S-IWF/IMSC according to the target cell identifier, and notifies the target network to perform handover.
  • Step S104 S-IWF/IMSC determines the UE A network resource is not present in the EUTRAN network, and a Prepare Sub Ho Response is sent to the source MSC, where the handover preparation response carries a network access indication, and the indication is used to inform the user that the device needs to be in the EUTRAN network.
  • the IMSC sends a bearer query request to the MME. Determining whether there is a network resource of the user equipment, or the IMSC directly queries the device for the presence of the MME information associated with the user equipment. If the MME information exists, the EUTRAN network has the network resource of the user equipment, otherwise the target network does not have the user equipment.
  • Step S105 The source MSC sends a handover request response message (HO Response) to the GERAN/UTRAN, where the HO Response message carries a Netwrok Access indication, and the indication is used to inform the UE that a new network resource needs to be established in the EUTRAN network to complete the handover;
  • Step SI 06 The GERAN/UTRAN sends a handover command (HO Command) to the UE, instructing the UE to transfer to the EUTRAN network, where the message carries a Network Access indication, instructing the UE to re-access the new network resource on the EUTRAN network to complete the handover;
  • HO Command handover command
  • Step S107 The UE moves to the coverage of the EUTRAN network, initiates an attach procedure or a TAU procedure to complete the access, establishes a network resource of the UE in the EUTRAN network, and completes the SR VCC service, and the bearer resource for establishing the UE can be seen in FIG. 4 To Figure 8.
  • FIG. 4 is a second flowchart of a method for processing an SR VCC service in the embodiment of the present invention.
  • the SIWF/IMSC uses a Globally Unique Temporary Identity (GUTI) value or an MME identifier allocated by the UE in the EUTRAN network. Knowing the ⁇ of the previously serving UE, the MME address information can be known according to the MME identity, so that when the UE is handed over to the EUTRAN network by the GERAN/UTRAN network, the SIWF/IMSC queries whether the MME of the UE exists by using the GUTI value or the MME identifier. Resources, so as to determine whether the UE has bearer resources in the EUTRAN network, the specific steps are as follows:
  • Step S201 Before the handover occurs, the UE sends the GUTI value of the UE or the MME identifier according to the GUTI value to the SIWF/IMSC through the control channel (ICCC, IMS CS Control Channel) between the IMS and the CS in the IMS domain, where :
  • the GUTI value contains the user's service MME identity;
  • Step S202 The UE reports a measurement report (measurement report);
  • Step S203 The GERAN/UTRAN decides to initiate a handover according to the measurement report reported by the UE, and sends a HO Required to the source MSC.
  • Step S204 The source MSC sends a Prepare Sub Ho Request to the S-IWF/IMSC according to the target cell identifier, and notifies the target network to perform handover.
  • Step S205 The SIWF/IMSC sends a bearer resource query message (Bearer Resource Query) to the corresponding MME according to the GUTI value or the MME identifier obtained in step S201, where the message carries the UE identifier and the SIWF/IMSC identifier.
  • the bearer resource query is sent to the corresponding MME according to the MME identifier, which may be the MME identifier sent by the MME to the MSC when the network is switched in FIG. 5, which may be
  • the MME identifiers registered by the user equipment in the MSC in FIG. 6 to FIG. 8 may also be the MME identifiers obtained by the MSC during the UE change process in FIG. 9 or FIG. If the flow in FIG. 11 to FIG. 13 is performed and the network resources of the user equipment do not exist in the network, step S207 is performed.
  • Step S207 When it is determined that there is no bearer resource of the UE in the EUTRAN network, the SIWF/IMSC sends a handover preparation response message (Prepare Sub Ho Response) to the source MSC;
  • a handover preparation response message Prepare Sub Ho Response
  • Step S208 The source MSC sends a handover request response (HO Response) to the access side.
  • HO Response handover request response
  • Step S209 After the UE switches to the LTE network, and completes the network access to establish the bearer resource, the call is anchored to the IMS network.
  • FIG. 5 is a third flowchart of the SR VCC service switching processing method in the embodiment of the present invention.
  • the MME carries the MME identity and/or the UE identifier when forwarding the handover request.
  • the SIWF/IMSC queries the corresponding MME according to the UE identity and the MME identity to check whether there is a bearer resource of the UE, thereby determining whether the UE exists in the EUTRAN network.
  • the network resources of the UE are used to determine whether the UE needs to reallocate the network resources in the EUTRAN network during the handover process, and the specific steps are as follows:
  • Step S301 The UE reports a measurement report to an evolved network base station (eNodeB);
  • Step S302 The eNodeB decides to initiate a handover, and sends a handover request Handover Request to the mobility management entity (MME);
  • MME mobility management entity
  • Step S303 The MME switches the voice call to the SIWF/IMSC, and sends a Forward Relocation Request message, where the message carries the MM Context, the VDN, the MSISDN, and the MME identifier.
  • Step S304 The SIWF/IMSC notifies the mobile switching center of the target side network to perform a resource preparation process and a domain switching process;
  • Step S305 The SIWF/IMSC sends a Forward Relocation Response to the MME.
  • Step S306 The UE switches to the GERAN/UTRAN network.
  • Steps S307 to S314 are the same as those of the flowcharts S202 to S209.
  • the MME identifier in step S303 determines whether there is a bearer resource of the UE, and details are not described herein.
  • FIG. 6 is a fourth flowchart of a method for processing an SR VCC service in the embodiment of the present invention.
  • an MME may register an MME identifier and/or a UE identifier with an MME, thereby performing network switching.
  • the MSC determines whether the network resource exists in the EUTRAN network according to the MME identifier.
  • the MSC determines that the network resource of the UE does not exist
  • the UE initiates an attach request to the mobility management entity in the EUTRAN network according to the network access indication information in the flowchart 3
  • the network access of the UE is completed and a new network resource is established in the manner of the flowchart, so that a new network resource is established in the EUTRAN network to complete the SR VCC service switching, and the specific steps are as follows:
  • Step S401 The UE sends an attach request (Attach Request) message to the MME, where the message carries the SR VCC capability of the UE or any other registration indication information that can indicate that the MME registers with the S-IFF/IMSC.
  • Step S402 Perform authentication between the UE, the mobility management network element, and the HSS
  • Step S403 Performing a process of updating the Location and Insert Subscriber Date (MME) between the MME and the HSS, registering the address of the MME into the HSS, and the HSS inserts the subscription data of the UE into the mobility management network element. ;
  • MME Location and Insert Subscriber Date
  • Step S404 The MME selects a PGW according to the default access point name (APN, Access Point Name) used by the UE, and sends a Create default bearer request message to the SGW to create a default PDN connection, and the PGW is established. After sending a default bearer setup response to the SGW, MME;
  • APN Access Point Name
  • Step S405 The MME returns an Attach Accept message to the UE.
  • Step S406 The MME according to the UE capability or the registration indication information carried by the UE in step S401, and the network architecture also supports the implementation, and the MME sends a registration request (Register Request) message to the S-IWF/IMSC, where the message carries the MME identifier. , UE identification;
  • a registration request (Register Request) message to the S-IWF/IMSC, where the message carries the MME identifier. , UE identification;
  • Step S407 The S-IWF/IMSC sends a registration response (Register Response) message to the MME, where the message carries the UE identifier.
  • a registration response (Register Response) message
  • Step S408 The MME sends an Update Location Request (Update Location Request) message to the HSS, where the message carries the APN and PGW address information of the default PDN connection used by the UE.
  • Step S409 The HSS saves the APN and PGW address information used by the UE. Returns the location update response message (Update Location Response) to the MME.
  • FIG. 7 is a fifth flowchart of the SR VCC service switching processing method in the embodiment of the present invention.
  • the MME may register the MME identifier and/or the UE identifier with the MSC, thereby performing network switching.
  • the MSC determines whether the network resource exists in the EUTRAN network according to the MME identifier.
  • Step S501 The UE sends an attach request (Attach Request) message to the MME, where the message carries the SR VCC capability of the UE or any other registration indication information that can indicate that the MME registers with the S-IFF/IMSC.
  • Step S502 Perform an authentication process between the UE, the mobility management network element, and the HSS.
  • Step S503 Performing a process of updating the location and the insertion of the subscriber data (Update Location and Insert Subscriber Date) between the MME and the HSS, registering the address of the MME into the HSS, and the HSS inserts the subscription data of the UE into the mobility management network element. ;
  • Step S504 The MME according to the UE capability or the registration indication information carried by the UE in step S501, and the network architecture also supports the implementation, and the MME sends a registration request (Register Request) message to the S-IWF/IMSC, where the message carries the MME identifier. , UE identification;
  • a registration request (Register Request) message to the S-IWF/IMSC, where the message carries the MME identifier. , UE identification;
  • Step S505 The S-IWF/IMSC sends a registration response (Register Response) message to the MME, where the message carries the UE identifier.
  • a registration response (Register Response) message
  • Step S506 The MME selects a PGW according to the default access point name (APN, Access Point Name) used by the UE, and sends a Create default bearer request message to the SGW to create a default PDN connection, and the PGW is established. After sending a default bearer setup response to the SGW, MME;
  • APN Access Point Name
  • Step S507 The MME returns an Attach Accept message to the UE.
  • Step S508 The MME sends an Update Location Request message to the HSS, where the message carries the APN and PGW address information of the default PDN connection used by the UE.
  • Step S509 The HSS saves the APN and PGW address information used by the UE. Returns the location update response message (Update Location Response) to the MME.
  • FIG. 8 is a sixth flowchart of the SR VCC service switching processing method in the embodiment of the present invention.
  • the network side informs the UE of the network side capability in the attach accept message, and the user decides to initiate according to the network side capability.
  • the circuit domain registration process registers the UE with the SIWF/IMSC, registers the MME with the S-IWF/IMSC, and establishes a new network resource.
  • the UE initiates an attach request to the mobility management entity in the EUTRAN network according to the network access indication information in the flowchart 3, by using a manner in the flowchart
  • the network access of the UE is completed, thereby establishing a new network resource in the EUTRAN network to complete the SR VCC service switching, and the specific steps are as follows:
  • Step S601 The UE sends an attach request (Attach Request) message to the MME;
  • Step S602 Perform an authentication process between the UE, the mobility management network element, and the HSS.
  • Step S603 Performing a process of updating the Location and Insert Subscriber Date (MME) between the MME and the HSS, registering the address of the MME into the HSS, and the HSS inserts the subscription data of the UE into the mobility management network element. ;
  • MME Location and Insert Subscriber Date
  • Step S604 The MME selects a PGW according to the default access point name (APN, Access Point Name) used by the UE, and sends a Create default bearer request message to the SGW to create a default PDN connection, and the PGW is established. After sending a default bearer setup response to the SGW, MME;
  • APN Access Point Name
  • Step S605 The MME sends an Attach Accept message to the UE, where the message carries the indication message that the network side allocates the GUTI and the TAI list to the UE, and the SR VCC capability supported by the network side or indicates the UE initiates the CS registration process, where:
  • the CS container cell includes information required for the UE to register with the SIWF/IMSC, such as location area information and location update type information, etc.);
  • Step S606 The MME sends an Update Location Request (Update Location Request) message to the HSS, where the message carries the APN and PGW address information of the default PDN connection used by the UE.
  • Step S607 The HSS saves the APN and PGW address information used by the UE. Returning the location update response message (Update Location Response) to the MME;
  • Step S608 The UE receives the SR VCC capability supported by the network side or the indication information indicating the UE to initiate the CS registration process, in step S605, in combination with the UE's own capability, if the UE also has The SR VCC service processing capability, the ij UE sends a tracking area update request (TAU Request) message, where the message includes GUTI, last visited TAI, Update Type, where the Update Type indicates that the CS registers or carries a new cell to indicate that the MME replaces the UE.
  • TAU Request tracking area update request
  • Step S609 After receiving the TAU request, the MME performs CS registration according to the Update Type for the CS registration or the newly added indication, and then selects an S-IWF/IMSC for the UE according to the location of the UE, and the MME sends a registration request (Register) Request) to the S-IWF/IMSC, carrying the UE identity and the MME identity and the CS container;
  • a registration request (Register) Request)
  • Step S610 The S-IWF/IMSC sends a location update request (Update Location) to the HSS, where the message carries the S-IWF/IMSC address and the UE identifier.
  • Update Location a location update request
  • Step S611 HSS loopback location update response (Update Location Ack) to SIWF/IMSC;
  • Step S612 The SIWF/IMSC sends a Register Response message to the MME, where the message carries the temporary identifier allocated by the SIWF/IMSC for the UE, and the temporary identifier item of the UE is optional.
  • Step S613 The MME sends a Tracking Area Update Request (TAU Accept) message to the UE, and carries the temporary identifier assigned by the SIWF/IMSC to the UE.
  • TAU Accept Tracking Area Update Request
  • FIG. 9 is a seventh flowchart of the method for processing an SR VCC service in the embodiment of the present invention.
  • the MME of the serving UE changes due to the mobility of the UE.
  • the latest MME identifier needs to be updated to the SIWF/IMSC.
  • the SIWF/IMSC can obtain the latest MME information, so as to ensure that the SIWF/IMSC knows whether the UE has network resources in the EUTRAN network according to the latest MME information
  • the source-side mobility management entity sends the identity of the mobile switching center.
  • the target-side mobility management entity updates the mobility management entity identifier and/or the user equipment identifier to the mobile switching center according to the mobile switching center identifier, as follows:
  • Step S701 The UE sends a tracking area update request (TAU Request) to the target side mobility management network element MME, because the UE moves to a new tracking area;
  • Step S702 The MME of the target side sends a context request (Context Request) to the source side MME, requesting context information of the user;
  • Step S703 The source side MME carries the context information related to the UE to the target MME by using a context response (Context Response) message, where the context carries the SIWF/IMSC address information.
  • Context Response Context Response
  • Step S704 The UE, the target side MME, and the HSS perform authentication;
  • Step S705 After receiving the context, the target MME sends a context response (Context Ack) to the source side MME.
  • Context Ack a context response
  • Step S706 The target MME receives the SIWF/IMSC information in step S704, determines that the context information of the user in the SIWF/IMSC needs to be updated, and sends a location update request (Update Location) message, where the message carries the UE identifier and the SIWF. /IMSC address, in order to avoid the UE's movement, the SIWF/IMSC information is invalidated;
  • Update Location location update request
  • Step S707 After receiving the location update message, the SIWF/IMSC updates the MME information of the UE, and sends a location update response (Update location Ack) message to the target MME, where the message carries the UE identifier.
  • a location update response Update location Ack
  • Step S708 The target side MME and the HSS perform a location update process and insert a subscription data flow;
  • Step S709 The target side MME sends a tracking area update accept (TAU Accept) message to FIG. 10 shows an eighth flowchart of the SR VCC service switching processing method in the embodiment of the present invention, which causes the serving UE to The SIWF/IMSC is changed.
  • the MME information associated with the UE needs to be forwarded to the next SIWF/IMSC.
  • the target side SIWF/IMSC receives the temporary identifier assigned by the source side SIWF/IMSC for the user equipment, according to the temporary obtained.
  • the mobile control entity identifier and/or the user equipment identifier are obtained by the identifier to the source side SIWF/IMSC, and the target side SIWF/IMSC updates the mobile switching center identifier to the mobility management entity according to the obtained mobility management entity identifier and/or user equipment identifier to ensure SIWF/IMSC can obtain MME information from The SIWF/IMSC ensures that the UE has network resources in the EUTRAN network according to the information of the MME, and the specific steps are as follows:
  • Step S801 The UE moves to a new SIWF/IMSC service area, and initiates a location update request, where the message carries a location update type, a temporary identifier TMSI, a location area identifier, and the like.
  • Step S802 The target side SIWF/IMSC finds the old side SIWF/IMSC according to the TMSI, and sends a context request (Context Request) to the source SIWF/IMSC to obtain the context information of the UE, where the message carries the old TMSI;
  • Context Request Context Request
  • Step S803 The source side SIWF/IMSC sends a context response message, where the message carries the MME identity of the previous service user.
  • Step S804 The target SIWF/IMSC sends an Update Location Request to the MME, and carries the UE identifier and the SIWF/IMSC identifier.
  • Step S805 The MME sends a location update response (Update Location Ack) to the SIWF/IMSC, where the message carries the UE identifier and the MME identifier.
  • Update Location Ack Update Location Ack
  • Step S806 performing location update, location cancellation, and insertion contract data flow between the target side SIWF/IMSC, the source side SIWF/IMSC, and the HSS;
  • Step S807 The target side SIWF/IMSC sends a location update accept message to the UE, where the message carries the location area LA, the temporary identifier TMSI assigned by the network side to the UE, and the like.
  • FIG. 11 is a ninth flowchart of the SR VCC service switching processing method in the embodiment of the present invention.
  • the MME initiates a process of separating the UE, and deletes the bearer context information of the UE on the SGW and the PGW. At this time, the MME notifies the SIWF/IMSC.
  • the information that the UE is deleted in the EUTRAN network resource cancels the registration information of the MME in the SIWF/IMSC, so as to ensure that, when the handover is performed, the SIWF can learn whether the UE has the resources of the UE in the EUTRAN network according to the presence or absence of the registration information of the MME, here, not only
  • the MME initiates the detach procedure, and the MME also needs to register its information in the SIWF/IMSC, and the MME also needs to perform the deregistration process initiated by the UE and the HSS.
  • the specific steps are as follows:
  • Step S901 If the MME initiates an explicit detach procedure, the MME sends a Detach Request to the UE, where the message carries a Detach Type;
  • Step S902 The MME sends a Delete Bearer Request message to
  • the SGW the message carries the tunnel identifier TEID
  • Step S903 The SGW sends a Delete Bearer Request message to the PGW, where the message carries the tunnel identifier TEID;
  • Step S904 The PGW sends a Delete Bearer Response message to the SGW, where the message carries the tunnel identifier TEID.
  • Step S905 The SGW sends a Delete Bearer Response message to the MME, where the message carries the tunnel identifier TEID;
  • Step S906 The MME sends a cancel registration request message to the SIWF/IMSC, where the message carries the UE identifier and the MME identifier, because the bearer resources of the UE are deleted in the EUTRAN network.
  • Step S907 The SIWF/IMSC sends a cancel registration response message to the MME, and informs the MME that the registration is complete, and the message carries the UE identifier.
  • FIG. 12 is a tenth flowchart of an SR VCC service switching processing method in an embodiment of the present invention, in which the registration information of the MME and the SIWF/IMSC of the UE are saved in the HSS, and the resources of the SR VCC user in the EUTRAN network are After being deleted and the network side supports the SR VCC function, the MME needs to notify the HSS that the bearer resource of the user is released, and the HSS notifies the SIWF/IMSC that the UE's network resources in the EUTRAN are released.
  • the specific steps are as follows:
  • Step 1001 If the mobility management entity MME initiates an explicit detach procedure, the MME sends a Detach Request to the UE, where the message carries a Detach Type; Step 1002: The MME sends a Delete Bearer Request message to the SGW, where the message carries the tunnel identifier TEID.
  • Step 1003 The SGW sends a Delete Bearer Request message to the PGW, where the message carries the tunnel identifier TEID.
  • Step 1004 The PGW sends a Delete Bearer Response message to
  • the SGW the message carries the tunnel identifier TEID
  • Step 1005 The SGW sends a Delete Bearer Response message to the MME, where the message carries the tunnel identifier TEID.
  • Step 1006 The mobility management entity MME sends a bearer resource deletion indication message (Delete bearer delete indication), where the message carries the UE identifier and the MME identifier, and the message is used to notify the HSS of the UE in the EUTRAN network. The resource has been released;
  • Delete bearer delete indication a bearer resource deletion indication message
  • Step 1007 After receiving the message, the HSS sends a bearer delete indication ack message to the MME, where the message carries the UE identifier. It should be noted that the step may also be performed after step 1009.
  • Step 1008 The HSS sends a bearer resource deletion indication (Delete bearer delete indication) to the SIWF/IMSC, and the message carries the MME identifier and/or the UE identifier to notify the SIWF/IMSC, and the bearer resource of the UE in the EUTRAN network is deleted.
  • Delete bearer delete indication a bearer resource deletion indication
  • Step 1009 The SIWF/IMSC sends a bearer resource deletion indication ack to the HSS, where the message carries the UE identifier.
  • Step 1010 The UE sends a detach to accept the MME.
  • FIG. 13 is a first flowchart of the SR VCC service switching processing method in the embodiment of the present invention. If the UE deletes related resources and information in the SIWF/IMSC, the UE needs to notify the UE in the SIWF/IMSC of the change. Related MME information of the serving MME, so as to prevent the subsequent MME from sending a message to the SIWF/IMSC for the UE, causing an error, the specific steps are as follows: Step S1101: The user deletes resources of the UE in the SIWF/IMSC due to shutdown or other errors;
  • Step S1102 The SIWF/IMSC sends a resource deletion indication (Resource Deletion Ind) according to the context information of the UE, where the message carries the identifier and/or the UE identifier.
  • Step 1103 The MME sends a Delete Bearer Request to SGW, deleting the bearer context information of the UE on the SGW, where the message carries the TEID;
  • Step S1104 The SGW sends a Delete Bearer Request to the PGW, and deletes the bearer context information of the UE on the PGW, where the message carries the TEID.
  • Step S 1105 The PGW sends a Delete Bearer Response to the SGW, where the message carries the TEID;
  • Step SI 106 The SGW sends a Delete Bearer Response (Delete Bearer Response) to the MME, where the message carries the TEID;
  • Step S1107 The MME sends a detach request to the UE, where the message carries a Detach Type.
  • Step S1108 The UE sends a Detach Accept message to the MME.
  • step S1107 to the step S1108 are optional, and if the MME initiates an implicit separation, the step does not exist.
  • FIG. 3 to FIG. 13 illustrate a flow in an SR VCC service switching processing method
  • FIG. 14 is a system structural diagram of an SR VCC service switching processing in an embodiment of the present invention, where the system includes a UE, a UTRAN/GERAN network,
  • the MSC, the MSC of the EUTRAN network includes a functional entity, an MME, an HSS, an SGW, a PGW, and the like that ensure continuity of voice services.
  • the measurement report is sent to the UTRAN/GERAN network, and the network access indication information returned by the SIWF/IMSC is received to indicate that the UE re-accesses in the EUTRAN network to create a new network resource to complete the SR VCC. business.
  • the UE sends the registration indication information to the MME, instructs the MME to register the MME identity and/or the UE identity in the MSC, or initiates a CS registration process, instructing the MME to register the MME identity with the MSC in the CS registration process. / or UE identification.
  • the UE When the location of the UE changes, when the MME or the MSC of the serving UE changes, the UE initiates a tracking area location request to the MME of the target side, or sends a location update request to the MSC of the target side, so that the user equipment
  • the associated MME information can be updated to the MSC in time.
  • the UE sends the GUTI value of the UE or the MME identity according to the GUTI value to the mobile switching center of the EUTRAN network.
  • the GERAN/UTRAN network sends a handover preparation request to the mobile switching center in the EUTRAN network according to the measurement report sent by the user equipment, and participates in related handover preparation work.
  • the mobile switching center After receiving the handover preparation request that the user equipment sent by the GERAN/UTRAN network is ready to be handed over to the EUTRAN network by the GERAN/UTRAN network, the mobile switching center determines whether the EUTRAN network is determined according to the received handover preparation request and the MME information associated with the UE. The network resource of the user equipment exists, and the SR VCC service switching process is performed for the user equipment according to the result of the judgment.
  • the specific judgment process may be: if the MME information exists in the MSC, it indicates that the network resource of the UE exists; or the bearer resource query request is sent to the corresponding MME according to the MME information, and the network of the UE is determined according to the returned bearer resource query response.
  • the resource if the returned bearer resource query response contains UE-related network resource information, indicates that the network resource of the UE exists. If it is determined that the network resource of the user equipment does not exist in the EUTRAN network, the MSC sends the network access indication information to the user equipment, establishes a new network resource for the user equipment, and completes the SR VCC service processing; if it is determined that the user equipment exists in the EUTRAN network When the network resources are used, the SR VCC switching process may be completed according to the network resources of the UE.
  • the SIWF/IMSC receives the MME identity and/or the UE identity registered by the UE when the UE performs the network access and establishes the bearer resource process; the SIWF/IMSC obtains the GUTI value of the UE from the UE before the handover process occurs or The MME identity that is derived from the GUTI; when the user equipment is handed over to the GERAN/UTRAN network by the EUTRAN network, receiving the mobility management entity identity and/or the user equipment identity carried by the mobility management entity in forwarding the handover request;
  • the mobility management entity of the service user equipment changes, and when the first mobility management entity changes to the second mobility management entity, the second mobility management entity is received to update the mobility management entity identifier and/or The user equipment identifier; when the location of the UE moves, the mobile switching center where the mobile switching center changes, when the first mobile switching center changes to the second mobile switching center, the second mobile switching center obtains the first mobile switching center
  • the MSC may obtain the address information of the MME according to the GUTI value or the MME identifier of the UE, so as to send a bearer resource query to the MME, and find, in the mobility management entity, whether the network resource of the user equipment exists, The query determines whether the network resource of the user equipment exists in the EUTRAN network; or the SIWF/IMSC can determine whether the network resource of the user equipment exists in the network by querying the MME information associated with the user equipment.
  • the SIWF/IMSC After the network resources of the UE in the SIWF/IMSC are deleted, the SIWF/IMSC sends a resource deletion indication to other network elements in the EUTRAN network, and the other network element deletes the network resource of the UE according to the resource deletion indication; or sends according to the MME.
  • the bearer resource deletion indication information deletes the network resource of the UE.
  • the MME, the HSS, the SGW, the PGW, and the like establish a new network resource for the UE according to the network access indication information sent by the SIWF/IMSC, and complete the SR VCC service switching.
  • the MME is configured to establish a bearer resource for the user equipment according to the network access indication information, and register the user equipment identifier and the mobility management entity identifier and/or the user equipment identifier in the mobile switching center in the EUTRAN network, and After the MME changes, the updated MME information is sent to the MSC; the HSS exchanges information with the mobile switching entity or the mobile switching center in the EUTRAN network to obtain network resource information of the user equipment; the SGW and the PGW participate in the attaching process or de-attach The process, in the attaching process, establishes a corresponding bearer resource in the network for the UE, or deletes the bearer resource of the UE in the network in the detach process.
  • FIG. 15 is a schematic structural diagram of a mobile switching center according to an embodiment of the present invention.
  • the mobile switching center includes a functional entity for ensuring continuity of voice services, including a first receiving module 152, a determining module 153, and a switching module 154.
  • the first receiving module 152 is configured to receive a handover preparation request that the user equipment is ready to be handed over to the EUTRAN network by the GERAN/UTRAN network;
  • the determining module 153 is configured to receive, according to the first receiving module, the handover preparation request and the mobility management
  • the body information determines whether the network resource of the user equipment exists in the EUTRAN network.
  • the switching module 154 is configured to perform the SR VCC service switching according to the result of the determining module determining whether the network resource of the user equipment exists.
  • the mobile switching center further includes an obtaining module 151, a second receiving module 155, a deleting module 157, and a sending module 156, where: the obtaining module 151 is configured to obtain mobility management entity information associated with the user equipment, where The mobile management entity information may be obtained by the determining module 152, and the determining module 152 determines whether there is a network resource of the user equipment according to the obtained mobility management entity information.
  • the second receiving module 155 is configured to: after the mobility management entity initiates the detaching process Receiving a bearer resource deletion request sent by the mobility management entity; the deleting module 156 is configured to delete the mobility management entity information associated with the user equipment according to the bearer resource deletion request received by the second receiving module 157; the sending module 156 is configured to associate with the user equipment After the mobility management entity information is deleted, a resource deletion indication is sent to the mobility management entity.
  • FIG. 16 is a schematic structural diagram of a judging module in the embodiment of the present invention.
  • the judging module 153 is provided with a sending unit 161, a receiving unit 162 and a first judging unit 163, wherein: the sending unit 161 is configured to receive After receiving the handover preparation request received by the first receiving module 152, the bearer resource query is sent to the mobility management entity according to the mobility management entity information obtained in the obtaining module 151.
  • the receiving unit 162 is configured to receive the bearer resource returned by the mobility management entity.
  • the first judging unit 163 is configured to determine, according to the returned bearer resource query result received by the receiving unit 162, whether the network resource of the user equipment exists in the EUTRAN network, and if there is a network resource of the user equipment in the returned bearer resource query result Then, the network resource of the user equipment exists in the network, otherwise the network resource of the user equipment does not exist.
  • the judging module 153 is further provided with a second judging unit 164, and the second judging unit 164 may determine, according to whether there is mobile management entity information associated with the user equipment in the SIWF/IMSC, whether there is a network resource of the user equipment, if If there is mobile management entity information, there is a network resource of the user equipment, otherwise there is no network resource of the user equipment.
  • FIG. 17 is a schematic structural diagram of a switching module according to an embodiment of the present invention.
  • the switching module 154 is provided with a first switching module 171 and a second switching module 172, where:
  • the unit 171 is configured to perform SR VCC service switching for the user equipment according to the network resource when the determining module 153 determines that the network resource of the user equipment exists in the EUTRAN network.
  • the second switching unit 172 is configured to determine, when the determining module 153 determines When the network resource of the user equipment does not exist in the EUTRAN network, the network access indication information is sent to the user equipment, and the user equipment initiates an attach procedure according to the network access indication information, and newly establishes the user equipment in the EUTRAN network. After the network resources, the SR VCC service is performed for the user equipment according to the newly established network resources.
  • FIG. 18 is a schematic structural diagram of an obtaining module in an embodiment of the present invention, where the obtaining module 151 includes a first obtaining unit 181, a second obtaining unit 182, a third obtaining unit 183 or a fourth obtaining unit 184, wherein
  • the first obtaining unit 181 is configured to obtain the mobility management entity identifier and/or the user equipment identifier that are registered by the user equipment in the registration process; and the second obtaining unit 182 is configured to: when the user equipment is in the mobile process, the mobile user management of the user equipment Receiving a change of the entity, when the first mobility management entity changes to the second mobility management entity, receiving the second mobility management entity identifier and/or the user equipment identifier sent by the second mobility management entity, or for the user equipment
  • the EUTRAN network is switched to the GERAN/UTRAN network, the mobile management entity identifier and/or the user equipment identifier carried by the mobility management entity in the process of forwarding the handover request is received; the third obtaining unit 183 is
  • FIG. 19 is a schematic structural diagram of a mobility management entity in an embodiment of the present invention, where the MME includes a first receiving module 191 and a registration module 192, where: the first receiving module 191 is configured to receive registration indication information initiated by the user equipment or The circuit domain registration information is used by the registration module 192 to register the mobility management entity identifier and/or the user equipment identifier with the mobile switching center according to the registration information received by the first receiving module.
  • the mobility management entity further includes a first sending module 193, a second receiving module 194, and a first detaching unit 195, where: the first sending module 193 is configured to move The mobile switching center sends a bearer resource deletion request.
  • the second receiving module 194 is configured to receive the resource deletion request sent by the mobile switching center.
  • the first detaching unit 195 is configured to initiate the detaching process according to the resource deletion request received by the second receiving module 194.
  • FIG. 20 is a schematic diagram of another structure of a mobility management entity in an embodiment of the present invention.
  • the MME includes a second sending module 201, where the second sending module 201 is configured to send mobility management entity information to a mobile switching center.
  • the mobility management entity information includes a mobility management entity identity and/or a user equipment identity.
  • the mobility management entity further includes a third sending module 202, a third receiving module 203, and a second detaching unit 204, where: the third sending module 202 is configured to send a bearer resource deletion request to the mobile switching center;
  • the third receiving module 203 is configured to receive the resource deletion request sent by the mobile switching center.
  • the second detaching unit 204 is configured to initiate the detaching process according to the resource deletion request received by the third receiving module 203.
  • the functional entities of the MME in FIG. 20 and FIG. 19 may be located on the same MME, and may send the information of the MME to the MSC according to different conditions of the MME.
  • FIG. 21 is a schematic structural diagram of a user equipment in the embodiment of the present invention.
  • the user equipment is provided with a sending unit 211, where the sending unit 211 is configured to send registration indication information to the mobility management entity, and instruct the mobile management entity to move to
  • the switching center registers the mobility management entity identity and/or the user equipment identity.
  • the sending unit 211 sends the indication information to: the control channel between the IP multimedia subsystem domain and the circuit domain, the global unique identifier value of the user equipment or the mobility management entity identifier and/or the user equipment identifier that is derived according to the global unique identifier. Send to the mobile switching center.
  • the above two functional entities can exist in the user equipment at the same time, and the information is sent to the corresponding device according to different conditions of the user equipment.
  • the target side network determines whether the user equipment has network resources, it is determined according to the target network side.
  • the result is SR VCC service switching processing.
  • the user equipment directly switches according to the network resource of the user equipment; otherwise, after determining that the network resource of the user equipment does not exist, the user equipment is Transmitting the network access indication information, the user equipment establishes a new network resource in the EUTRAN network according to the network access indication information, and completes the SR VCC service switching according to the establishment of the new network resource, and implements the foregoing method to complete the
  • the network resources in the EUTRAN network are judged, and in the case of determining the network resources of the user equipment, the voice continuity of the user equipment can be guaranteed.
  • the MME information is registered in the SIWF/IMSC.
  • the MME actively cancels the MME registered in the S-IWF.
  • Information when the SIWF/IMSC of the serving UE changes, it is also necessary to notify the SIWF/IMSC of the serving UE in time.
  • the S-IWF determines whether the network resource of the UE exists in the target EUTRAN network by determining whether the serving MME information of the UE exists.
  • the MME information exists in the S-IWF or the IMSC, or the S-IWF or the IMSC sends a bearer query request to the MME, and the queried EUTRAN network has the user's network resources, it indicates that the EUTRAN network has the UE's network resources, otherwise, the UE does not exist. Internet resources.

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Description

一种 SR VCC业务切换处理方法及设备
本申请要求了 2008年 5月 28日提交的, 申请号为 200810028367.9, 发 明名称为 "一种 SR VCC业务切换处理方法及设备" 的中国申请优先权, 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及一种通信应用领域, 尤其涉及一种 SR VCC业务切换处理方 法及设备。 背景技术
3GPP为了增强未来网络的竞争能力, 正在研究一种全新的演进网络, 其系统架构图如图 1所示, 包括演进的通用移动通信系统 (Universal Mobile Telecommunications System, UMTS ) 陆地无线接入网 ( E-UTRAN, Evolved UMTS Terrestrial Radio Access Network) , 用于实现所有与演进网 络无线有关的功能; 移动管理实体 ( MME, Mobility Management Entity) , 负责控制面的移动性管理, 包括用户上下文和移动状态管理, 分 配用户临时身份标识等; 服务网关实体 (SGW, Serving Gateway ) , 是 3GPP接入网络间的用户面锚点, 终止 E-TURAN的接口; 分组数据网络网 关实体 (PGW, Packet Data Network Gateway) 是 3GPP接入网络和非 3GPP 接入网络之间的用户面锚点, 终止和外部分组数据网络 (PDN, Packet Data Network) 的接口。 策略和计费规则功能实体 (PCRF , Policy and Charging Rule Function ) 用于策略控制决定和流计费控制功能。 归属网络服务器 (HSS , Home Subscriber Server) 用于存储用户签约信息。
如图 2所示为现有单接入系统语音连续性 (SR VCC , Single Radio VCC ) 系统架构图, 为了保证语音业务的连续性, 增加一个新的逻辑功能 实体 SR VCC域间功能 (S-IWF, SR VCC Interworking Function) , 可将该 功能实体放置于移动交换中心 (MSC, Mobile Switching Centre) 中, 并将 该 MSC称为 IMSC, 该实体的主要作用是帮助 Single Radio UE完成 CS域 和 PS 域间语音连续性。 VCC-AS 是 IP 多媒体子系统 (IP Multimedia Subsystem, IMS ) 系统中用于帮助完成域切换的一个功能实体。 当正在进 行语音业务的用户从 2G/3G 网络切换到长期演进 (LTE, long-term evolution) 网络时, 如果在 LTE网络存在该用户的网络资源, 则网络侧无 需在切换过程中为用户重新分配网络侧资源。
需要说明的是, 这两个架构并不意味着最终的系统架构演进 (SAE, System Architecture Evolution) 系统架构和 SR VCC系统架构图, 最后的架 构可能和这两个架构有所差别, 不对这两个架构作限制。
现有技术中, 当用户从 GSM/EDGE无线接入网络 (GSM EDGE Radio Access Network , GERAN ) /UMTS 无线接入网 (UTRAN ) 网络切换到 EUTRAN 网络时, 并且用户正在进行语音业务, 此时需要将语音业务切换 到 EUTRAN网络并保证语音连续性, 此时如果在 LTE网络仍然存在该用户 的网络资源, 则网络侧无需在切换过程中为用户重新分配网络侧资源, 并且 IMSC收到源侧的切换请求后通知源侧 GERAN/UTRAN网络目标侧资源准 备完成。 现有技术中暂时没有解决用户由 GERAN/UTRAN切换到 EUTRAN 网络时如何判断用户在目标 EUTRAN网络是否存在该用户的网络资源, 并 且也没有解决当目标 EUTRAN网络不存在该用户的网络资源时如何进行语 音连续性的解决方法。 发明内容
鉴于上述现有技术所存在的问题, 本发明实施例提供了一种 SR VCC业 务切换处理方法及设备。 在用户设备由 GERAN/UTRAN 网络准备切换到 EUTRAN网络时, 根据目标侧网络判断用户设备网络资源的情况完成 SR VCC业务切换。 为了解决上述技术问题, 本发明实施例提出了一种 SR VCC业务切换处 理方法, 该方法包括:
当用户设备从 GERAN/UTRAN网络切换到 EUTRAN网络时, 接收用 户设备发送的切换准备请求;
根据所述接收的切换准备请求和移动管理实体信息判断 EUTRAN网络 中是否存在用户设备的网络资源;
根据判断是否存在用户设备的网络资源的结果为用户设备进行 SR VCC 业务切换。
相应的, 本发明实施例还提出了一种移动交换中心, 包括:
第一接收模块, 用于接收用户设备由 GERAN/UTRAN网络准备切换到
EUTRAN网络的切换准备请求;
判断模块, 用于根据所述第一接收模块接收的切换准备请求和移动管理 实体信息判断 EUTRAN网络中是否存在用户设备的网络资源;
切换模块, 用于根据判断模块判断是否存在用户设备的网络资源的结果 进行 SR VCC业务切换。
相应的, 本发明实施例还提出了一种移动管理实体, 包括:
第一接收模块, 用于接收用户设备发送的注册指示信息或电路域注册信 息;
注册模块, 用于根据第一接收模块接收的注册信息向移动交换中心注册 移动管理实体标识和 /或用户设备标识。
相应的, 本发明实施例还提出了一种用户设备, 包括:
发送单元, 用于向移动管理实体发送指示信息, 所述指示信息携还有移 动管理实体标识和 /或用户设备标识, 用于指示移动管理实体向移动交换中 心注册。
实施本发明实施例, 通过本发明实施例中提供的方法及设备, 在用户设 备由 GERAN/UTRAN网络准备切换到 EUTRAN网络时, 在目标侧网络判 断该用户设备是否存在该用户设备的网络资源, 并根据判断的结果为用户设 备进行 SR VCC业务切换, 通过上述方法的实现, 完成了对 EUTRAN网络 中的网络资源判断, 并在判断是否存在用户设备的网络资源情况下, 从而在 切换的时候采用不同的处理方法, 减少消息交互, 减少切换时延, 也可以保 证用户设备的语音连续性。 附图说明
图 1是现有的 SAE系统架构图;
图 2是现有的 SR VCC系统结构图;
图 3是本发明实施例中的 SR VCC业务切换处理方法的第一流程图; 图 4是本发明实施例中的 SR VCC业务切换处理方法的第二流程图; 图 5是本发明实施例中的 SR VCC业务切换处理方法的第三流程图; 图 6是本发明实施例中的 SR VCC业务切换处理方法的第四流程图; 图 7是本发明实施例中的 SR VCC业务切换处理方法的第五流程图; 图 8是本发明实施例中的 SR VCC业务切换处理方法的第六流程图; 图 9是本发明实施例中的 SR VCC业务切换处理方法的第七流程图; 图 10是本发明实施例中的 SR VCC业务切换处理方法的第八流程图; 图 11是本发明实施例中的 SR VCC业务切换处理方法的第九流程图; 图 12是本发明实施例中的 SR VCC业务切换处理方法的第十流程图; 图 13 是本发明实施例中的 SR VCC业务切换处理方法的第 ^一流程 图;
图 14是本发明实施例中的 SR VCC业务切换处理方法的系统结构图; 图 15是本发明实施例中的移动交换中心的结构示意图;
图 16是本发明实施例中的判断模块的结构示意图;
图 17是本发明实施例中的切换模块的结构示意图;
图 18是本发明实施例中的获得模块的结构示意图; 图 19是本发明实施例中的移动管理实体的结构示意图;
图 20是本发明实施例中的移动管理实体的另一结构示意图;
图 21是本发明实施例中的用户设备的结构示意图。 具体实施方式
本发明实施例提供了一种 SR VCC业务切换处理方法及设备。 在用户设 备由 GERAN/UTRAN网络准备切换到 EUTRAN网络时, 判断目标侧网络 是否存在用户设备的网络资源以完成 SR VCC业务切换。
由于 UE在 GERAN/UTRAN和 EUTRAN进行语音业务切换时, S-IWF 或者 IMSC是 UE在两个网络之间进行语音切换的中间功能实体, 它联系着 源侧网络和目标侧网络。 在 UE发起附着请求后接入网络建立新的网络资源 时, 将 MME信息注册到 S-IWF或者 IMSC中, 当该 UE在 LTE网络的资源 被清除时, MME主动取消其注册在 S-IWF或者 IMSC中的 MME信息; 当 服务 UE的 S-IWF或者 IMSC发生变化时也需要及时将 MME信息通知给服 务 UE 的 S-IWF或者 IMSC。 这样 UE 由 GERAN/UTRAN 网络切换到 EUTRAN网络时, S-IWF或者 IMSC通过判断是否存在该 UE的服务 MME 信息从而判断目标 EUTRAN网络是否存在该 UE的网络资源。 如果 S-IWF 或者 IMSC存在 MME信息, 或者 S-IWF或者 IMSC向 MME发送承载查询 请求, 查询到 EUTRAN网络存在用户的网络资源时, 则表示 EUTRAN网 络存在 UE的网络资源, 反之则不存在 UE的网络资源。 通过将 MME注册 到 SIWF或者 IMSC中, (UE在 EUTRAN网络资源删除或者 UE分离后, MME需要去注册) , 如此 S-IWF或者 IMSC即可获知 UE在 EUTRAN网络 是否存在网络资源, 从而在切换的时候采用不同的处理方法, 减少消息交 互, 减少切换时延。
下面结合附图详细说明本发明的优选实施例。 需要说明的是, 文中描述的 S-IWF/IMSC表示 S-IWF或者 IMSC, 并且 涉及到的 MME标识或者 SIWF/IMSC标识, 其中的标识可以指地址或者别 名, 这里不作限制。 这里提到的 MSC可以指 IMSC或者普通的 MSC。
图 3示出了本发明实施例中的 SR VCC业务切换处理方法的第一流程 图, 在实施该流程图时, 如果 EUTRAN网络不存在该用户的网络资源, 则 当用户设备 (UE ) 由 GERAN/UTRAN 网络切换到 EUTRAN 网络时, SIWF/IMSC在切换过程中需要指示 UE重新附着以建立 UE在 EUTRAN网 络的承载资源, 以完成 SR VCC的切换过程, 具体歩骤如下:
歩骤 S101 : UE上报测量报告 (measurement report) ;
歩骤 S102: GERAN/UTRAN根据 UE上报的测量报告决定发起切换, 遂发送切换请求 (HO Required) 给源 MSC;
歩骤 S103 : 源移动交换中心 (MSC) 根据目标小区标识发送切换准备 请求 (Prepare Sub Ho Request) 给 S-IWF/IMSC, 通知目标网络进行切换; 歩骤 S104: S-IWF/IMSC判断出 UE在 EUTRAN网络中不存在网络资 源, 遂发送切换准备响应 (Prepare Sub Ho Response) 给源 MSC, 该切换准 备响应中携带网络接入指示 (Network Access indication) , 通过该指示告知 用户设备需要在 EUTRAN 网络接入新建网络资源以完成切换, 关于 S- IWF/IMSC判断 UE在 EUTRAN网络中不存在网络资源的过程可详见流程 图 4中的歩骤 S205和歩骤 S206中 IMSC向 MME发送承载查询请求判断是 否存在用户设备的网络资源, 或 IMSC直接在其设备中查询是否存在用户设 备相关联的 MME信息, 如果存在 MME信息, 则 EUTRAN网络存在用户 设备的网络资源, 否则目标网络不存在用户设备的网络资源;
歩骤 S105 : 源 MSC 发送切换请求应答消息 (HO Response ) 给 GERAN/UTRAN, 在该 HO Response 消息中携带 Netwrok Access indication, 通过该指示告知 UE需要在 EUTRAN网络新建网络资源以完成 切换; 歩骤 SI 06: GERAN/UTRAN发送切换命令 (HO Command) 给 UE, 指示 UE转移到 EUTRAN网络, 该消息中携带 Network Access indication, 指示 UE在 EUTRAN网络重新接入新建网络资源以完成切换;
歩骤 S107: UE转移到 EUTRAN网络的覆盖下, 遂发起附着流程或者 TAU流程完成接入, 在 EUTRAN网络中建立 UE的网络资源, 完成 SR VCC业务, 关于建立 UE的承载资源可详见图 4至图 8。
图 4示出了本发明实施例中的 SR VCC业务切换处理方法的第二流程 图, SIWF/IMSC 通过 UE 在 EUTRAN 网络分配的全局唯一临时标识 (GUTI, Globally Unique Temporary Identity) 值或者 MME标识从而获知先 前服务 UE的 ΜΜΕ, 根据所述 MME标识可以得知 MME地址信息, 从而 在 UE由 GERAN/UTRAN网络切换到 EUTRAN网络时, SIWF/IMSC通过 GUTI值或 MME标识查询相应 MME是否存在 UE的承载资源, 从而判断 出 UE在 EUTRAN网络中是否存在承载资源, 具体歩骤如下:
歩骤 S201 : 在发生切换前, UE通过 IMS域中的 IMS与 CS间的控制通 道 (ICCC, IMS CS Control Channel) 将 UE的 GUTI值或者根据 GUTI值得 出的 MME标识带给 SIWF/IMSC, 其中: GUTI值中包含用户的服务 MME 标识;
歩骤 S202: UE上报测量报告 (measurement report) ;
歩骤 S203: GERAN/UTRAN根据 UE上报的测量报告决定发起切换, 遂发送 HO Required给源 MSC;
歩骤 S204: 源 MSC根据目标小区标识发送 Prepare Sub Ho Request给 S-IWF/IMSC, 通知目标网络进行切换;
歩骤 S205: SIWF/IMSC根据歩骤 S201中获知的 GUTI值或者 MME标 识向相应的 MME发送承载资源查询消息 (Bearer Resource Query) , 该消 息中携带 UE标识和 SIWF/IMSC标识; 歩骤 S206: MME 收到承载资源查询消息后 ( Bearer Resource Query) , 查询 MME中是否存所述用户的承载上下文信息, 并在承载资源 指示消息 (Bearer Resource Ind) 中告知 SIWF/IMSC所在的 EUTRAN网络 是否存在该用户的承载资源, 该消息中携带 EPS bearer indication, 通过该标 识可以获知 EUTRAN网络是否存在该 UE的承载资源;
需要说明的是, 关于歩骤中 S205和歩骤 S206 中的判断过程, 根据 MME标识向相应的 MME发送承载资源查询, 可以是图 5中网络切换时, MME向 MSC发送的 MME标识, 可以是图 6至图 8中用户设备在 MSC中 注册的 MME标识, 也可以是图 9或图 10中 UE变化过程中, MSC获得的 MME标识。 如果进行了图 11至图 13中的流程, 用户设备的网络资源不存 在网络中时, 则需要进行歩骤 S207。
歩骤 S207 : 在确定 EUTRAN 网络中不存在该 UE 的承载资源时, SIWF/IMSC 发送切换准备响应消息 (Prepare Sub Ho Response ) 给源 MSC;
歩骤 S208 : 源 MSC 发送切换请求应答 (HO Response ) 给接入侧
GERAN/UTRAN;
歩骤 S209: UE切换到 LTE网络, 并完成网络接入建立承载资源后, 将呼叫锚定在 IMS网络。
图 5示出了本发明实施例中的 SR VCC业务切换处理方法的第三流程 图, 当 UE由 EUTRAN网络切换到 GERAN/UTRAN网络时, MME在转发 切换请求时携带 MME标识和 /或 UE标识给 SIWF/IMSC; 后续当 UE 由 GERAN/UTRAN网络切换到 EUTRAN网络时, SIWF/IMSC根据 UE标识和 MME标识到相应 MME查询是否存在该 UE的承载资源, 从而判断出 UE在 EUTRAN网络中是否存在 UE的网络资源, 以判断切换过程中是否需要为 UE在 EUTRAN网络重新分配网络资源来完成切换, 具体歩骤如下:
歩骤 S301 : UE上报测量报告给演进网络基站 (eNodeB) ; 歩骤 S302: eNodeB决定发起切换, 发送切换请求 Handover Request给 移动管理实体 (MME) ;
歩骤 S303: MME将语音呼叫切换到 SIWF/IMSC中, 发送转发切换请 求 (Forward Relocation Request) 消息, 消息中携带 MM上下文、 VDN、 MSISDN、 MME标识;
歩骤 S304: SIWF/IMSC通知目标侧网络的移动交换中心做资源准备流 程和域切换流程;
歩骤 S305: SIWF/IMSC 发送转发切换响应 ( Forward Relocation Response) 给 MME;
歩骤 S306: UE切换到 GERAN/UTRAN网络下;
歩骤 S307至歩骤 S314与流程图 4歩骤 S202至歩骤 S209相同, 通过歩 骤 S303中的 MME标识判断是否存在 UE的承载资源, 这里就不再过多赘 述。
图 6示出了本发明实施例中的 SR VCC业务切换处理方法的第四流程 图, 在用户设备发起的附着过程中, 可以通过 MME向 MSC注册 MME标 识和 /或 UE标识, 从而为网络切换时, MSC根据 MME标识判断 EUTRAN 网络中是否存在网络资源; 在 MSC判断不存在 UE的网络资源时, UE根据 流程图 3中的网络接入指示信息向 EUTRAN网络中的移动管理实体发起附 着请求, 通过流程图中的方式完成了 UE的网络接入并建立了新的网络资 源, 从而在 EUTRAN网络中建立新的网络资源来完成 SR VCC业务切换, 具体歩骤如下:
歩骤 S401 : UE发送附着请求 (Attach Request) 消息到 MME, 该消息 中携带 UE 的 SR VCC 能力或者其他任何可以指示 MME 注册到 S- IWF/IMSC的注册指示信息;
歩骤 S402 : UE、 移动性管理网元、 HSS 之间执行鉴权
(Authentication) 流程; 歩骤 S403: MME和 HSS之间执行位置更新和插入签约数据 (Update Location and Insert Subscriber Date) 流程, 将 MME的地址注册到 HSS中, 同时 HSS将 UE的签约数据插入到移动性管理网元中;
歩骤 S404: MME根据 UE使用的缺省接入点名称 (APN, Access Point Name) 选择 PGW, 发送创建缺省承载 (Create default bearer) 请求消息到 SGW进行缺省 PDN连接的创建, PGW建立完成后发送缺省承载建立响应 给 SGW、 MME;
歩骤 S405: MME回附着接受 (Attach Accept) 消息到 UE;
歩骤 S406: MME根据歩骤 S401中 UE携带的 UE能力或者注册指示信 息, 并且网络架构也支持该实现, MME 即发送注册请求 (Register Request) 消息到 S-IWF/IMSC, 消息中携带 MME标识、 UE标识;
歩骤 S407: S-IWF/IMSC给 MME发送注册响应 (Register Response)消息 给 MME, 消息中携带 UE标识;
歩骤 S408: MME发送更新位置请求 (Update Location Request) 消息 到 HSS, 消息中携带 UE使用的缺省 PDN连接的 APN和 PGW地址信息; 歩骤 S409: HSS保存 UE使用的 APN和 PGW地址信息, 返回位置更 新响应消息 (Update Location Response) 到 MME。
图 7示出了本发明实施例中的 SR VCC业务切换处理方法的第五流程 图, 在用户设备发起的附着过程中, 可以通过 MME向 MSC注册 MME标 识和 /或 UE标识, 从而为网络切换时, MSC根据 MME标识判断 EUTRAN 网络中是否存在网络资源; 在 MSC判断不存在 UE的网络资源时, UE根据 流程图 3中的网络接入指示信息向 EUTRAN网络中的移动管理实体发起附 着请求, 通过流程图中的方式完成了 UE的网络接入并建立了新的网络资 源, 从而在 EUTRAN网络中建立新的网络资源来完成 SR VCC业务切换, 具体歩骤如下: 歩骤 S501 : UE发送附着请求 (Attach Request) 消息到 MME, 该消息 中携带 UE 的 SR VCC 能力或者其他任何可以指示 MME 注册到 S- IWF/IMSC的注册指示信息;
歩骤 S502 : UE、 移动性管理网元、 HSS 之间执行鉴权 (Authentication) 流程;
歩骤 S503: MME和 HSS之间执行位置更新和插入签约数据 (Update Location and Insert Subscriber Date) 流程, 将 MME的地址注册到 HSS中, 同时 HSS将 UE的签约数据插入到移动性管理网元中;
歩骤 S504: MME根据歩骤 S501中 UE携带的 UE能力或者注册指示信 息, 并且网络架构也支持该实现, MME 即发送注册请求 (Register Request) 消息到 S-IWF/IMSC, 消息中携带 MME标识、 UE标识;
歩骤 S505: S-IWF/IMSC给 MME发送注册响应 (Register Response)消息 给 MME, 消息中携带 UE标识;
歩骤 S506: MME根据 UE使用的缺省接入点名称 (APN, Access Point Name) 选择 PGW, 发送创建缺省承载 (Create default bearer) 请求消息到 SGW进行缺省 PDN连接的创建, PGW建立完成后发送缺省承载建立响应 给 SGW、 MME;
歩骤 S507: MME回附着接受 (Attach Accept) 消息到 UE;
歩骤 S508: MME发送更新位置请求 (Update Location Request) 消息 到 HSS, 消息中携带 UE使用的缺省 PDN连接的 APN和 PGW地址信息; 歩骤 S509: HSS保存 UE使用的 APN和 PGW地址信息, 返回位置更 新响应消息 (Update Location Response) 到 MME。
图 8示出了本发明实施例中的 SR VCC业务切换处理方法的第六流程 图, 在附着到 EUTRAN网络时, 网络侧在附着接受消息中告知 UE网络侧 能力, 用户根据网络侧能力决定发起电路域注册流程, 将 UE注册到 SIWF/IMSC中, 同时将 MME注册到 S-IWF/IMSC中并建立了新的网络资 源, 从而为网络切换时, 根据 MME标识判断 EUTRAN网络中是否存在网 络资源; UE根据流程图 3中的网络接入指示信息向 EUTRAN网络中的移动 管理实体发起附着请求, 通过流程图中的方式完成了 UE的网络接入, 从而 在 EUTRAN网络中建立新的网络资源来完成 SR VCC业务切换, 具体歩骤 如下:
歩骤 S601 : UE发送附着请求 (Attach Request) 消息到 MME;
歩骤 S602: UE、 移动性管理网元、 HSS 之间执行鉴权 (Authentication) 流程;
歩骤 S603: MME和 HSS之间执行位置更新和插入签约数据 (Update Location and Insert Subscriber Date) 流程, 将 MME的地址注册到 HSS中, 同时 HSS将 UE的签约数据插入到移动性管理网元中;
歩骤 S604: MME根据 UE使用的缺省接入点名称 (APN, Access Point Name) 选择 PGW, 发送创建缺省承载 (Create default bearer) 请求消息到 SGW进行缺省 PDN连接的创建, PGW建立完成后发送缺省承载建立响应 给 SGW、 MME;
歩骤 S605: MME发送附着接受 Attach Accept消息给 UE, 消息中携带 网络侧给 UE分配 GUTI和 TAI list以及网络侧支持的 SR VCC能力或者指 示 UE发起 CS注册流程的指示信息、 CS container, 其中: CS container信 元包括 UE注册到 SIWF/IMSC需要的信息, 如位置区信息和位置更新类型 信息等) ;
歩骤 S606: MME发送更新位置请求 (Update Location Request) 消息 到 HSS, 消息中携带 UE使用的缺省 PDN连接的 APN和 PGW地址信息; 歩骤 S607: HSS保存 UE使用的 APN和 PGW地址信息, 返回位置更 新响应消息 (Update Location Response) 到 MME;
歩骤 S608: UE在歩骤 S605中收到网络侧支持的 SR VCC能力或者指 示 UE发起 CS注册流程的指示信息, 结合 UE自身能力, 如果 UE也具有 SR VCC业务处理能力, 贝 ij UE发送跟踪区更新请求 (TAU Request) 消 息, 消息中包含 GUTI, last visited TAI, Update Type, 其中 Update Type指 示 CS注册或者携带一个新的信元来指示 MME代替 UE进行 CS注册, 通过 该指示 MME可以获知需要将 UE注册到 SIWF/IMSC中;
歩骤 S609: MME收到 TAU请求后, 根据 Update Type为 CS注册或者 新增的指示进行 CS注册的信元, 则根据 UE 的位置为 UE选择一个 S- IWF/IMSC, MME发送注册请求 (Register Request) 到 S-IWF/IMSC, 携带 UE标识和 MME标识和 CS container;
歩骤 S610 : S-IWF/IMSC 发送位置更新请求 (Update Location ) 到 HSS, 消息中携带 S-IWF/IMSC地址、 UE标识;
歩骤 S611 : HSS 回送位置更新响应 (Update Location Ack ) 给 SIWF/IMSC;
歩骤 S612: SIWF/IMSC发送 Register Response消息给 MME, 消息中 携带 SIWF/IMSC为 UE分配的临时标识, 该 UE的临时标识项可选;
歩骤 S613: MME发送跟踪区更新请求 (TAU Accept) 消息给 UE, 携 带 SIWF/IMSC为 UE分配的临时标识。
图 9示出了本发明实施例中的 SR VCC业务切换处理方法的第七流程 图, 由于 UE的移动, 导致服务 UE的 MME发生变化, 此时需要将最新的 MME标识更新到 SIWF/IMSC中, 以保证 SIWF/IMSC可以获取到最新的 MME信息, 从而保证 SIWF/IMSC根据最新的 MME的信息, 获知 UE在 EUTRAN 网络中是否存在网络资源, 源侧的移动管理实体将移动交换中心 的标识发送给目标侧移动管理实体, 目标侧移动管理实体根据所述移动交换 中心标识向所述移动交换中心更新的移动管理实体标识和 /或用户设备标 识, 具体歩骤如下:
歩骤 S701 : 由于 UE的移动到了一个新的跟踪区, UE发送跟踪区更新 请求 (TAU Request) 给目标侧移动性管理网元 MME; 歩骤 S702: 目标侧的 MME发送上下文请求 (Context Request) 到源侧 MME, 请求用户的上下文信息;
歩骤 S703 : 源侧 MME将该 UE相关的上下文信息通过上下文响应 ( Context Response ) 消息带给目标侧 MME, 其中上下文中携带 SIWF/IMSC地址信息;
歩骤 S704: UE、 目标侧 MME、 HSS进行鉴权;
歩骤 S705 : 目标侧 MME收到上下文后, 发送上下文应答 (Context Ack) 给源侧 MME;
歩骤 S706: 目标侧 MME在歩骤 S704中收到 SIWF/IMSC信息, 判断 需要更新 SIWF/IMSC 中该用户的上下文信息, 遂发送位置更新请求 (Update Location) 消息, 消息中携带 UE标识和 SIWF/IMSC地址, 该歩 骤为了避免 UE的移动导致 SIWF/IMSC的信息失效;
歩骤 S707 : SIWF/IMSC收到位置更新消息后, 更新 UE的 MME信 息, 同时发送位置更新响应 (Update location Ack) 消息给目标侧 MME, 消 息中携带 UE标识;
歩骤 S708: 目标侧 MME和 HSS进行位置更新流程和插入签约数据流 程;
歩骤 S709: 目标侧 MME发送跟踪区更新接受 (TAU Accept) 消息给 图 10示出了本发明实施例中的 SR VCC业务切换处理方法的第八流程 图, 由于 UE的移动, 导致服务 UE的 SIWF/IMSC发生变化, 此时需要将 UE相关联的 MME信息传递到下个 SIWF/IMSC中, 目标侧 SIWF/IMSC接 收源侧 SIWF/IMSC为用户设备分配的临时标识, 根据所述获得的临时标识 到源侧 SIWF/IMSC 中获得移动管理实体标识和 /或用户设备标识, 目标侧 SIWF/IMSC根据获得的移动管理实体标识和 /或用户设备标识向移动管理实 体更新移动交换中心标识, 以保证 SIWF/IMSC可以获取到 MME信息, 从 而保证 SIWF/IMSC根据 MME的信息, 获知 UE在 EUTRAN网络中是否存 在网络资源, 具体歩骤如下:
歩骤 S801 : UE移动到新的 SIWF/IMSC服务区, 遂发起位置更新请求 ( Location Update Request ) , 消息中携带位置更新类型 location update type、 UE的临时标识 TMSI、 位置区标识等;
歩骤 S802: 目标侧 SIWF/IMSC根据 TMSI找到老侧 SIWF/IMSC, 并 发送上下文请求 (Context Request) 到源 SIWF/IMSC, 获取 UE的上下文信 息, 消息中携带 old TMSI;
歩骤 S803 : 源侧 SIWF/IMSC发送上下文响应 (Context Response) 消 息, 消息中携带先前服务用户的 MME标识;
歩骤 S804 : 目标 SIWF/IMSC 发送位置更新请求 (Update Location Request) 到 MME, 携带 UE标识和 SIWF/IMSC标识;
歩骤 S805 : MME 发送位置更新应答 (Update Location Ack ) 给 SIWF/IMSC, 消息中携带 UE标识和 MME标识;
歩骤 S806: 目标侧 SIWF/IMSC、 源侧 SIWF/IMSC和 HSS之间进行位 置更新、 位置取消和插入签约数据流程;
歩骤 S807: 目标侧 SIWF/IMSC发送位置更新接受消息给 UE, 消息中 携带位置区 LA、 网络侧给 UE分配的临时标识 TMSI等信息。
图 11示出了本发明实施例中的 SR VCC业务切换处理方法的第九流程 图, MME发起分离 UE的流程, 删除 SGW和 PGW上 UE的承载上下文信 息, 此时 MME要通知 SIWF/IMSC, UE在 EUTRAN网络资源被删除的信 息, 取消 MME在 SIWF/IMSC的注册信息, 从而保证切换时, SIWF可以根 据有无 MME 的注册信息获知网络侧是否存在 UE在 EUTRAN 网络的资 源, 在这里, 不仅 MME 发起去附着流程, MME 也需要去注册其在 SIWF/IMSC的信息, 而且 UE和 HSS发起的去注册流程时, MME同样需要 去注册其在 SIWF/IMSC的信息, 如 MME标识和 /或 UE标识, 具体歩骤如 下:
歩骤 S901 : 如果 MME发起显式去附着流程, 则 MME发送去附着请求 (Detach Request) 给 UE, 消息中携带 Detach Type;
歩骤 S902 : MME发送删除承载请求 (Delete bearer request) 消息给
SGW, 消息中携带隧道标识 TEID;
歩骤 S903 : SGW发送删除承载请求 (Delete bearer request) 消息给 PGW, 消息中携带隧道标识 TEID;
歩骤 S904: PGW发送删除承载响应 (Delete bearer response) 消息给 SGW, 消息中携带隧道标识 TEID;
歩骤 S905 : SGW发送删除承载响应 (Delete bearer response) 消息给 MME, 消息中携带隧道标识 TEID;
歩骤 S906: 由于 UE在 EUTRAN网络的承载资源全部删除, MME发 送取消注册请求消息 (cancel registration request) 消息给 SIWF/IMSC, 消息 中携带 UE标识和 MME标识;
歩骤 S907 : SIWF/IMSC 发送取消注册响应 ( cancel registration response) 消息给 MME, 告知 MME取消注册完成, 消息中携带 UE标识; 歩骤 S908: UE发送去附着接受给 MME。
图 12示出了本发明实施例中的 SR VCC业务切换处理方法的第十流程 图, 将该 UE的 MME和 SIWF/IMSC的注册信息都保存到 HSS中, 当 SR VCC用户在 EUTRAN网络的资源被删除后并且网络侧支持 SR VCC功能, 则 MME 需要通知 HSS , 该用户的承载资源被释放, HSS 会通知 SIWF/IMSC该 UE在 EUTRAN的网络资源被释放, 具体歩骤如下:
歩骤 1001 : 如果移动性管理实体 MME发起显式去附着流程, 则 MME 发送去附着请求 (Detach Request) 给 UE, 消息中携带 Detach Type; 歩骤 1002 : MME发送删除承载请求 (Delete bearer request) 消息给 SGW, 消息中携带隧道标识 TEID;
歩骤 1003 : SGW发送删除承载请求 (Delete bearer request) 消息给 PGW, 消息中携带隧道标识 TEID;
歩骤 1004: PGW发送删除承载响应 (Delete bearer response) 消息给
SGW, 消息中携带隧道标识 TEID;
歩骤 1005: SGW发送删除承载响应 (Delete bearer response) 消息给 MME, 消息中携带隧道标识 TEID;
歩骤 1006: 移动性管理实体 MME在 UE承载资源删除后, 发送承载资 源删除指示消息 (Delete bearer delete indication) , 消息中携带 UE标识和 MME标识, 通过该消息通知 HSS该 UE在 EUTRAN网络的承载资源已被 释放;
歩骤 1007 : HSS收到该消息后, 发送承载删除指示应答消息 (Delete bearer delete indication ack) 给 MME, 消息中携带 UE标识, 需要说明的 是, 该歩骤也可在歩骤 1009后执行;
歩骤 1008 : HSS 发送承载资源删除指示 (Delete bearer delete indication ) 给 SIWF/IMSC , 消息中携带 MME标识和 /或 UE标识告知 SIWF/IMSC, UE在 EUTRAN网络的承载资源被删除;
歩骤 1009 : SIWF/IMSC发送承载资源删除指示应答 (Delete bearer delete indication ack) 给 HSS, 消息中携带 UE标识;
歩骤 1010: UE发送去附着接受给 MME。
图 13示出了本发明实施例中的 SR VCC业务切换处理方法的第 ^一流 程图, 如果 UE在 SIWF/IMSC中的相关资源和信息删除后, 需要将该变化 通知 SIWF/IMSC中该 UE相关的服务 MME的 MME信息, 以免后续 MME 针对该 UE发送消息给 SIWF/IMSC, 造成错误, 具体歩骤如下: 歩骤 S1101 : 用户由于关机或者其他错误导致 UE在 SIWF/IMSC中的 资源被删除;
歩骤 S1102 : SIWF/IMSC根据 UE 的上下文信息发送资源删除指示 (Resource Deletion Ind) 给 ΜΜΕ, 消息中携带 ΜΜΕ标识和 /或 UE标识; 歩骤 1103: MME发送删除承载请求 (Delete Bearer request) 到 SGW, 删除 SGW上 UE的承载上下文信息, 消息中携带 TEID;
歩骤 S 1104: SGW 发送删除承载请求 ( Delete Bearer request ) 到 PGW, 删除 PGW上 UE的承载上下文信息, 消息中携带 TEID;
歩骤 S 1105: PGW发送删除承载响应 ( Delete Bearer Response ) 到 SGW, 消息中携带 TEID;
歩骤 SI 106 : SGW发送删除承载响应 (Delete Bearer Response ) 到 MME, 消息中携带 TEID;
歩骤 S1107: MME发送去附着请求给 UE, 消息中携带 Detach Type; 歩骤 S 1108: UE发送 Detach Accept消息给 MME。
需要说明的是, 所述歩骤 S1107至歩骤 S1108可选, 如果 MME发起的 是隐式分离, 则该歩骤不存在。
图 3至图 13中描述了 SR VCC业务切换处理方法中的流程, 图 14示出 了本发明实施例中的 SR VCC业务切换处理的系统结构图, 该系统包括了 UE、 UTRAN/GERAN网络、 MSC, 所述 EUTRAN网络的 MSC中含有保证 语音业务连续性的功能实体、 MME、 HSS、 SGW、 PGW等。
UE 由 UTRAN/GERAN 网络切换到 EUTRAN 网络时 , 向 UTRAN/GERAN网络发送测量报告, 并接收 SIWF/IMSC返回的网络接入指 示信息指示 UE在 EUTRAN 网络中重新接入创建新的网络资源完成 SR VCC业务。 所述 UE在发起的附着过程中, 发送注册指示信息给 MME, 指 示 MME到 MSC中注册 MME标识和 /或 UE标识, 或者发起 CS注册过程, 指示 MME在 CS注册过程中向 MSC注册 MME标识和 /或 UE标识。 所述 UE在移动的过程中, 所处的位置发生变化时, 服务 UE的 MME或 MSC发 生变化时, 向目标侧的 MME发起跟踪区位置请求, 或向目标侧的 MSC发 送位置更新请求, 使用户设备相关联的 MME信息能及时更新到 MSC中。 在发生网络切换之前, UE会将 UE的 GUTI值或根据 GUTI值得出的 MME 标识发送给所述 EUTRAN网络的移动交换中心。
所述 GERAN/UTRAN网络根据用户设备发送的测量报告向 EUTRAN 网络中的移动交换中心发送切换准备请求, 并参与相关的切换准备工作。
移动交换中心在接收到 GERAN/UTRAN 网络发送的用户设备由 GERAN/UTRAN网络准备切换到 EUTRAN网络的切换准备请求后, 根据所 述接收的切换准备请求和 UE相关联的 MME信息判断 EUTRAN网络中是 否存在用户设备的网络资源, 并根据判断的结果为用户设备进行 SR VCC业 务切换处理。 具体的判断过程可以是, 如果 MSC中存在 MME信息, 则表 示存在 UE的网络资源; 或者根据 MME信息向所对应的 MME发送承载资 源查询请求, 根据返回的承载资源查询响应判断是否存在 UE的网络资源, 如果返回的承载资源查询响应含有 UE相关的网络资源信息, 则表示存在 UE的网络资源。 若判断 EUTRAN网络中不存在用户设备的网络资源时, MSC则发送网络接入指示信息给用户设备, 为用户设备建立新的网络资 源, 完成 SR VCC业务处理; 若判断 EUTRAN网络中存在用户设备的网络 资源时, 则根据 UE的网络资源完成 SR VCC切换处理即可。 SIWF/IMSC 会在 UE进行网络接入并建立承载资源过程时, 接收 UE注册的 MME标识 和 /或 UE标识; 所述 SIWF/IMSC在在发生切换处理之前, 从 UE处获得 UE 的 GUTI值或根据 GUTI值得出的 MME标识; 当所述用户设备由 EUTRAN 网络切换到 GERAN/UTRAN网络时, 接收移动管理实体在转发切换请求过 程中携带的移动管理实体标识和 /或用户设备标识; 当 UE在移动过程中, 服务用户设备的移动管理实体发生变化, 由第一移动管理实体变化到第二移 动管理实体时, 接收所述第二移动管理实体更新移动管理实体标识和 /或用 户设备标识; 当 UE的位置移动时, 所处的移动交换中心发生变化, 由第一 移动交换中心变化到第二移动交换中心时, 第二移动交换中心从第一移动交 换中心获得所述第一移动交换中心关联的移动管理实体标识和 /或用户设备 标识。 在准备切换的过程中, MSC根据 UE的 GUTI值或 MME标识可以获 得 MME的地址信息, 从而向 MME发送承载资源查询, 在所述移动管理实 体中查找是否存在所述用户设备的网络资源, 通过所述查询判断 EUTRAN 网络中是否存在用户设备的网络资源; 或者 SIWF/IMSC通过查询用户设备 相关联的 MME信息即可判断网络中是否存在用户设备的网络资源。 在 SIWF/IMSC中的 UE的网络资源被删除之后, SIWF/IMSC发送资源删除指 示给 EUTRAN 网络中的其他网元, 其他网元根据所述资源删除指示删除 UE的网络资源; 或根据 MME发送的承载资源删除指示信息删除 UE的网 络资源。
MME、 HSS、 SGW、 PGW等为所述 UE根据所述 SIWF/IMSC发送的 网络接入指示信息建立新的网络资源, 并完成 SR VCC业务切换。 其中的 MME为用户设备根据网络接入指示信息为所述用户设备建立承载资源, 为 用户设备在 EUTRAN网络中的移动交换中心中注册用户设备标识和移动管 理实体标识和 /或用户设备标识, 并在 MME发生变化之后, 向 MSC发送更 新的 MME信息; HSS与所述移动管理实体或 EUTRAN网络中的移动交换 中心进行信息交互, 获得用户设备的网络资源信息; SGW和 PGW参与附 着流程或去附着流程, 在附着流程中为 UE在网络中建立相应的承载资源, 或在去附着流程中删除 UE在网络中的承载资源。
图 15示出了本发明实施例中的移动交换中心的结构示意图, 所述移动 交换中心中含有保证语音业务连续性的功能实体, 包括第一接收模块 152、 判断模块 153和切换模块 154, 其中: 第一接收模块 152用于接收用户设备 由 GERAN/UTRAN网络准备切换到 EUTRAN网络的切换准备请求; 判断 模块 153用于根据所述第一接收模块接收 152的切换准备请求和移动管理实 体信息判断 EUTRAN网络中是否存在用户设备的网络资源; 切换模块 154 用于根据判断模块判断是否存在用户设备的网络资源的结果进行 SR VCC业 务切换。 相应的, 所述移动交换中心中还设有获得模块 151、 第二接收模块 155、 删除模块 157和发送模块 156, 其中: 获得模块 151用于获得用户设 备相关联的移动管理实体信息, 其中获得的移动管理实体信息可以为判断模 块 152所获取, 判断模块 152根据所述获得的移动管理实体信息判断是否存 在用户设备的网络资源; 第二接收模块 155用于在移动管理实体发起去附着 过程后, 接收移动管理实体发送的承载资源删除请求; 删除模块 156用于根 据第二接收模块 157接收的承载资源删除请求删除用户设备相关联的移动管 理实体信息; 发送模块 156用于当用户设备相关联的移动管理实体信息被删 除后, 向移动管理实体发送资源删除指示。
相应的, 图 16示出了本发明实施例中判断模块的结构示意图, 所述判 断模块 153 中设有发送单元 161、 接收单元 162和第一判断单元 163, 其 中: 发送单元 161用于在收到第一接收模块 152接收的切换准备请求后, 根 据获取模块 151中获得的移动管理实体信息向所述移动管理实体发送承载资 源查询; 接收单元 162用于接收所述移动管理实体返回的承载资源查询结 果; 第一判断单元 163用于根据所述接收单元 162接收的返回的承载资源查 询结果判断 EUTRAN网络中是否存在用户设备的网络资源, 如果返回的承 载资源查询结果中有用户设备的网络资源, 则判断所述网络中存在用户设备 的网络资源, 否则不存在用户设备的网络资源。 相应的, 判断模块 153中还 设有第二判断单元 164, 所述第二判断单元 164可以根据 SIWF/IMSC中是 否存在用户设备相关联的移动管理实体信息判断是否存在用户设备的网络资 源, 如果存在移动管理实体信息, 则存在用户设备的网络资源, 否则不存在 用户设备的网络资源。
相应的, 图 17示出了本发明实施例中切换模块的结构示意图, 所述切 换模块 154中设有第一切换模块 171和第二切换模块 172, 其中: 第一切换 单元 171用于当判断模块 153判断所述 EUTRAN网络中存在用户设备的网 络资源时, 根据所述网络资源为用户设备进行 SR VCC业务切换; 第二切换 单元 172用于当判断模块 153判断所述 EUTRAN网络中不存在用户设备的 网络资源时, 向用户设备发送网络接入指示信息, 在所述用户设备根据所述 网络接入指示信息发起附着过程, 在 EUTRAN网络中为所述用户设备建立 新的网络资源后, 根据新建立的网络资源为用户设备进行 SR VCC业务。
相应的, 图 18示出了本发明实施例中获得模块的结构示意图, 所述获 得模块 151包括第一获得单元 181、 第二获得单元 182、 第三获得单元 183 或第四获得单元 184, 其中: 第一获得单元 181用于获得用户设备在发起注 册过程中注册的移动管理实体标识和 /或用户设备标识; 第二获得单元 182 用于当用户设备在移动过程中, 服务用户设备的移动管理实体发生变化, 由 第一移动管理实体变化到第二移动管理实体时, 接收所述第二移动管理实体 发送的第二移动管理实体标识和 /或用户设备标识, 或用于当所述用户设备 由 EUTRAN网络切换到 GERAN/UTRAN网络时, 接收移动管理实体在转 发切换请求过程中携带的移动管理实体标识和 /或用户设备标识; 第三获得 单元 183用于当用户设备在移动过程中, 所处的移动交换中心发生变化, 由 第一移动交换中心变化到第二移动交换中心时, 第二移动交换中心从第一移 动交换中心获得所述第一移动交换中心关联的移动管理实体标识和 /或用户 设备标识; 第四获得单元 184用于接收用户设备发送的全局唯一标识值或根 据所述全局唯一标识值得出的移动管理实体标识和 /或用户设备标识。
图 19示出了本发明实施例中的移动管理实体的结构示意图, 该 MME 中包括第一接收模块 191和注册模块 192, 其中: 第一接收模块 191用于接 收用户设备发起的注册指示信息或电路域注册信息; 注册模块 192用于根据 第一接收模块接收的注册信息向移动交换中心注册移动管理实体标识和 /或 用户设备标识。 相应的, 所述移动管理实体还包括有第一发送模块 193、 第 二接收模块 194、 第一去附着单元 195, 其中: 第一发送模块 193用于向移 动交换中心发送承载资源删除请求; 第二接收模块 194用于接收移动交换中 心发送的资源删除请求; 第一去附着单元 195用于根据第二接收模块 194接 收的资源删除请求发起去附着过程。
图 20示出了本发明实施例中的移动管理实体的另一结构示意图, 该 MME中包括第二发送模块 201, 所述第二发送模块 201用于向移动交换中 心发送移动管理实体信息, 所述移动管理实体信息包括移动管理实体标识和 /或用户设备标识。 相应的, 所述移动管理实体还包括有第三发送模块 202、 第三接收模块 203、 第二去附着单元 204, 其中: 第三发送模块 202用 于向移动交换中心发送承载资源删除请求; 第三接收模块 203用于接收移动 交换中心发送的资源删除请求; 第二去附着单元 204用于根据第三接收模块 203接收的资源删除请求发起去附着过程。
需要说明的是, 图 20和图 19 中 MME 的功能实体可以位于同一个 MME上, 可以根据 MME所处的不同情况, 向 MSC发送 MME的信息。
图 21 示出了本发明实施例中的用户设备的结构示意图, 所述用户设备 中设有发送单元 211, 所述发送单元 211用于向移动管理实体发送注册指示 信息, 指示移动管理实体向移动交换中心注册移动管理实体标识和 /或用户 设备标识。 所述发送单元 211 发送指示信息为: IP多媒体子系统域和电路 域间的控制通道将用户设备的全局唯一标识值或根据所述全局唯一标识值得 出的移动管理实体标识和 /或用户设备标识发送给移动交换中心。 用户设备 中可以同时存在上述两种功能实体, 按照用户设备的不同情况发送信息给相 应的设备。
综上所述, 通过本发明实施例中提供的方法, 在用户设备由 GERAN/UTRAN网络准备切换到 EUTRAN网络时, 在目标侧网络判断该用 户设备是否存在网络资源情况后, 根据目标网络侧判断的结果进行 SR VCC 业务切换处理。 如果存在用户设备网络资源时, 则直接根据用户设备的网络 资源进行切换; 否则, 在判断不存在用户设备的网络资源后, 则向用户设备 发送网络接入指示信息, 用户设备根据所述网络接入指示信息在 EUTRAN 网络中建立新的网络资源, 并根据建立新的网络资源完成了 SR VCC业务切 换, 通过上述方法的实现, 完成了对 EUTRAN网络中的网络资源判断, 并 在判断用户设备的网络资源情况下, 可以保证用户设备的语音连续性。 在 UE发起附着请求后接入网络建立新的网络资源时, 将 MME信息注册到 SIWF/IMSC中, 当该 UE在 LTE网络的资源被清除时, MME主动取消其注 册在 S-IWF中的 MME信息; 当服务 UE的 SIWF/IMSC发生变化时也需要 及时需要将 MME 信息通知给服务 UE 的 SIWF/IMSC。 这样 UE 由 GERAN/UTRAN网络切换到 EUTRAN网络时, S-IWF通过判断是否存在该 UE的服务 MME信息从而判断目标 EUTRAN网络是否存在该 UE的网络资 源。 如果 S-IWF或者 IMSC存在 MME信息, 或者 S-IWF或者 IMSC 向 MME发送承载查询请求, 查询到 EUTRAN网络存在用户的网络资源时, 则表示 EUTRAN网络存在 UE 的网络资源, 反之则不存在 UE 的网络资 源。 通过将 MME注册到 SIWF/IMSC中, (UE在 EUTRAN网络资源删除 或者 UE分离后, MME需要去注册) , 如此 S-IWF/IMSC即可获知 UE在 EUTRAN 网络是否存在网络资源, 从而在切换的时候采用不同的处理方 法, 减少消息交互, 减少切换时延。
以上所揭露的仅为本发明实施例中的一些较佳实施例而已, 当然不能以 此来限定本发明之权利范围, 因此依本发明权利要求所作的等同变化, 仍属 本发明所涵盖的范围。

Claims

权利 要 求 书
1、 一种 SR VCC业务切换处理方法, 其特征在于, 该方法包括: 当用户设备从 GERAN/UTRAN网络切换到 EUTRAN网络时, 接收用 户设备发送的切换准备请求;
根据所述接收的切换准备请求和移动管理实体信息判断 EUTRAN网络 中是否存在用户设备的网络资源;
根据判断是否存在用户设备的网络资源的结果为用户设备进行 SR VCC 业务切换。
2、 如权利要求 1所述的方法, 其特征在于, 在判断所述 EUTRAN网络 中是否存在用户设备的网络资源之前, 所述方法包括:
获得用户设备相关联的移动管理实体信息。
3、 如权利要求 2所述的方法, 其特征在于, 所述获得用户设备相关联 的移动管理实体信息具体包括:
获得用户设备在发起附着过程中注册的移动管理实体标识和 /或用户设 备标识;
接收用户设备在发起电路域注册过程中服务用户的移动管理实体标识和 /或用户设备标识;
当用户设备在移动过程中, 服务用户设备的移动管理实体由第一移动管 理实体变化到第二移动管理实体时, 接收所述第二移动管理实体更新移动管 理实体标识和 /或用户设备标识;
当用户设备在移动过程中, 由第一移动交换中心变化到第二移动交换中 心时, 第二移动交换中心从第一移动交换中心获得所述第一移动交换中心关 联的移动管理实体标识和 /或用户设备标识;
当所述用户设备由 EUTRAN网络切换到 GERAN/UTRAN网络时, 接 收移动管理实体在转发切换请求过程中携带的移动管理实体标识和 /或用户 设备标识;
接收用户设备发送的全局唯一临时标识值或根据所述全局唯一临时标识 值得出的移动管理实体标识和 /或用户设备标识。
4、 如权利要求 3所述的方法, 其特征在于, 所述获得用户设备在发起 附着过程中注册的移动管理实体标识和 /或用户设备标识歩骤具体为:
移动管理实体接收用户设备发送的指示所述移动管理实体注册到移动交 换中心的注册指示信息;
移动管理实体根据所述接收的注册指示信息向移动交换中心注册移动管 理实体标识和 /或用户设备标识。
5、 如权利要求 3所述的方法, 其特征在于, 所述接收用户设备在发起 电路域注册过程中服务用户的移动管理实体标识和 /或用户设备标识歩骤具 体为:
移动管理实体向用户设备发送指示用户设备发起电路域注册过程的指示 自 . 用户设备根据所述指示信息发起电路域注册过程, 移动管理实体在所述 电路域注册过程中向移动交换中心注册移动管理实体标识和 /或用户设备标 识。
6、 如权利要求 3所述的方法, 其特征在于, 所述接收所述第二移动管 理信息更新移动管理实体标识和 /或用户设备标识歩骤具体为:
第一移动管理实体将移动交换中心的标识发送给第二移动管理实体; 第二移动管理实体根据所述移动交换中心标识向所述移动交换中心更新 的移动管理实体标识和 /或用户设备标识。
7、 如权利要求 3所述的方法, 其特征在于, 所述第二移动交换中心从 第一移动交换中心获得所述第一移动交换中心关联的移动管理实体标识和 / 或用户设备标识歩骤具体为:
第二移动交换中心接收第一移动交换中心为用户设备分配的临时标识, 根据所述获得的临时标识到第一移动交换中心中获得移动管理实体标识和 / 或用户设备标识;
第二移动交换中心根据获得的移动管理实体标识和 /或用户设备标识向 移动管理实体更新移动交换中心标识。
8、 如权利要求 3所述的方法, 其特征在于, 所述接收用户设备发送的 全局唯一临时标识值或根据所述全局唯一临时标识值得出的移动管理实体标 识和 /或用户设备标识歩骤具体为:
用户设备通过 IP多媒体子系统域和电路域间的控制通道将用户设备的 全局唯一临时标识值或根据所述全局唯一临时标识值得出的移动管理实体标 识和 /或用户设备标识发送给移动交换中心。
9、 如权利要求 1所述的方法, 其特征在于, 所述根据判断是否存在用 户设备的网络资源的结果为用户设备进行 SR VCC业务切换具体为:
当用户设备所在 EUTRAN网络中的网络资源被删除后, 接收移动管理 实体发送的承载资源删除请求;
根据所述承载资源删除请求删除用户设备相关联的移动管理实体信息, 所述移动管理实体信息为移动管理实体标识和 /或用户设备标识。
10、 如权利要求 1所述的方法, 其特征在于, 所述根据判断是否存在用 户设备的网络资源的结果为用户设备进行 SR VCC业务切换具体为:
当所述用户设备相关联的移动管理实体信息被删除后, 向移动管理实体 发送资源删除指示, 所述移动管理实体信息为移动管理实体标识和 /或用户 设备标识;
移动管理实体接收所述资源删除指示, 并根据所述资源删除指示发起去 附着过程。
11、 如权利要求 1所述的方法, 其特征在于, 所述根据所述接收的切换 准备请求和获取的移动管理实体信息判断 EUTRAN网络中是否存在用户设 备的网络资源歩骤具体为: 根据移动管理实体信息向所述移动管理实体发送承载资源查询; 接收所述移动管理实体返回的承载资源查询结果;
根据所述返回的承载资源查询结果判断 EUTRAN网络中是否存在用户 设备的网络资源。
12、 如权利要求 1所述的方法, 其特征在于, 所述根据所述接收的切换 准备请求和获取的移动管理实体信息判断 EUTRAN网络中是否存在用户设 备的网络资源歩骤具体为:
根据 EUTRAN网络中是否存在用户设备相关联的移动管理实体信息判 断是否存在用户设备的网络资源。
13、 如权利要求 11或 12所述的方法, 其特征在于, 所述根据判断是否 存在用户设备的网络资源的结果为用户设备进行 SR VCC业务切换歩骤具体 为:
当判断所述 EUTRAN网络中存在用户设备的网络资源时, 根据所述网 络资源为用户设备进行 SR VCC业务切换;
当判断所述 EUTRAN网络中不存在用户设备的网络资源时, 向用户设 备发送网络接入指示信息, 所述用户设备根据所述网络接入指示信息发起附 着过程, 在 EUTRAN网络中为所述用户设备建立新的网络资源, 并根据新 建立的网络资源为用户设备进行 SR VCC业务。
14、 一种移动交换中心, 其特征在于, 所述的移动交换中心包括: 第一接收模块, 用于接收用户设备由 GERAN/UTRAN网络准备切换到
EUTRAN网络的切换准备请求;
判断模块, 用于根据所述第一接收模块接收的切换准备请求和移动管理 实体信息判断 EUTRAN网络中是否存在用户设备的网络资源;
切换模块, 用于根据判断模块判断是否存在用户设备的网络资源的结果 进行 SR VCC业务切换。
15、 如权利要求 14所述的移动交换中心, 其特征在于, 所述判断模块 包括:
发送单元, 用于根据移动管理实体信息向所述移动管理实体发送承载资 源查询;
接收单元, 用于接收所述移动管理实体返回的承载资源查询结果; 第一判断单元, 用于根据所述接收单元接收的返回的承载资源查询结果 判断 EUTRAN网络中是否存在用户设备的网络资源;
第二判断单元, 用于根据是否存在用户设备相关联的移动管理实体信息 判断是否存在用户设备的网络资源。
16、 如权利要求 15所述的移动交换中心, 其特征在于, 所述切换模块 包括:
第一切换单元, 用于当判断模块判断所述 EUTRAN网络中存在用户设 备的网络资源时, 根据所述网络资源为用户设备进行 SR VCC业务切换; 第二切换单元, 用于当判断模块判断所述 EUTRAN网络中不存在用户 设备的网络资源时, 向用户设备发送网络接入指示信息, 在所述用户设备根 据所述网络接入指示信息发起附着过程, 在 EUTRAN网络中为所述用户设 备建立新的网络资源后, 根据新建立的网络资源为用户设备进行 SR VCC业
17、 如权利要求 16所述的移动交换中心, 其特征在于, 所述移动交换 中心还包括:
获得模块, 用于获得用户设备相关联的移动管理实体信息;
第二接收模块, 用于在移动管理实体发起去附着过程时, 接收移动管理 实体发送的承载资源删除请求;
删除模块, 用于根据第二接收模块接收的承载资源删除请求删除用户设 备相关联的移动管理实体信息;
发送模块, 用于当用户设备相关联的移动管理实体信息被删除后, 向移 动管理实体发送资源删除指示。
18、 如权利要求 17所述的移动交换中心, 其特征在于, 所述获得模块 包括:
第一获得单元, 用于获得用户设备在发起注册过程中注册的移动管理实 体标识和 /或用户设备标识; 或者
第二获得单元, 用于当用户设备在移动过程中, 服务用户设备的移动管 理实体发生变化, 由第一移动管理实体变化到第二移动管理实体时, 接收所 述第二移动管理实体发送的第二移动管理实体标识和 /或用户设备标识, 或 用于当所述用户设备由 EUTRAN网络切换到 GERAN/UTRAN网络时, 接 收移动管理实体在转发切换请求过程中携带的移动管理实体标识和 /或用户 设备标识; 或者
第三获得单元, 用于当用户设备在移动过程中, 所处的移动交换中心发 生变化, 由第一移动交换中心变化到第二移动交换中心时, 第二移动交换中 心从第一移动交换中心获得所述第一移动交换中心关联的移动管理实体标识 和 /或用户设备标识; 或者
第四获得单元, 用于接收用户设备发送的全局唯一临时标识值或根据所 述全局唯一临时标识值得出的移动管理实体标识和 /或用户设备标识。
19、 一种移动管理实体, 其特征在于, 所述的移动管理实体包括: 第一接收模块, 用于接收用户设备发送的注册指示信息或电路域注册信 息;
注册模块, 用于根据第一接收模块接收的注册信息向移动交换中心注册 移动管理实体标识和 /或用户设备标识。
20、 如权利要求 19所述的移动管理实体, 其特征在于, 所述移动管理 实体还包括:
第一发送模块, 用于向移动交换中心发送承载资源删除请求; 第二接收模块, 用于接收移动交换中心发送的资源删除请求; 第一去附着单元, 用于根据第二接收模块接收的资源删除请求发起去附 着过程;
第二发送模块, 用于向移动交换中心发送移动管理实体信息, 所述移动 管理实体信息包括移动管理实体标识和 /或用户设备标识;
第三发送模块, 用于向移动交换中心发送承载资源删除请求; 第三接收模块, 用于接收移动交换中心发送的资源删除请求; 第二去附着单元, 用于根据第三接收模块接收的资源删除请求发起去附 着过程。
21、 一种用户设备, 其特征在于, 所述的设备包括:
发送单元, 用于向移动管理实体发送指示信息, 所述指示信息携还有移 动管理实体标识和 /或用户设备标识, 用于指示移动管理实体向移动交换中 心注册。
22、 如权利要求 21所述的设备, 其特征在于, 所述的设备包括: 所述发送单元发送指示信息为: 通过 IP多媒体子系统域和电路域间的 控制通道将用户设备的全局唯一临时标识值或根据所述全局唯一临时标识值 得出的移动管理实体标识和 /或用户设备标识发送给移动交换中心。
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