WO2014005525A1 - 资源承载的预留方法及系统 - Google Patents

资源承载的预留方法及系统 Download PDF

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Publication number
WO2014005525A1
WO2014005525A1 PCT/CN2013/078768 CN2013078768W WO2014005525A1 WO 2014005525 A1 WO2014005525 A1 WO 2014005525A1 CN 2013078768 W CN2013078768 W CN 2013078768W WO 2014005525 A1 WO2014005525 A1 WO 2014005525A1
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Prior art keywords
request message
target network
base station
target
source
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PCT/CN2013/078768
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English (en)
French (fr)
Inventor
邹常乐
梁爽
Original Assignee
中兴通讯股份有限公司
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Publication of WO2014005525A1 publication Critical patent/WO2014005525A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/16Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/26Resource reservation

Definitions

  • the present invention relates to the field of communications, and in particular, to a resource bearer reservation method and system.
  • IP Multimedia Core Subsystem is an Internet Protocol (IP) based on the Internet Protocol (3GPP) proposed by the 3rd Generation Partnership Project (3GPP).
  • IP Internet Protocol
  • 3GPP Internet Protocol
  • 3GPP 3rd Generation Partnership Project
  • the network architecture which builds an open and flexible business environment, supports multimedia applications, and provides users with rich multimedia services.
  • the control layer and the service layer are separated from each other.
  • the control layer does not provide specific services, and only provides necessary triggering, routing, and accounting functions to the service layer.
  • the service triggering and control functions in the control layer are implemented by the Call Session Control Function (CSCF).
  • CSCF Call Session Control Function
  • the call session control function can be divided into the following three types: Type 1, Proxy-CSCF (P-CSCF for short); Type 2, Interrogating-CSCF (I-CSCF for short) Type 3, Serving Call Session Control Function (Serving-CSCF, S-CSCF for short); Among them, the primary responsibility is S-CSCF, while the I-CSCF is optional.
  • the business layer is composed of a series of application servers (Application Servers, referred to as ASs), which can provide specific business services.
  • the AS can be an independent entity or it can exist in the S-CSCF.
  • the control layer controls the service trigger according to the subscription information of the user, invokes the service on the AS, and implements the service function.
  • An end-to-end device in a session is called a user equipment (User Equipment, UE for short), and is responsible for interacting with the user.
  • Some UEs have multiple ways of accessing the network, and may include: The Packet Switch (referred to as the PS) domain access network accesses the network through other non-3GPP PS domains, and can even access the network through a Circuit Switch (CS) domain.
  • the PS network is configured with an enhanced mobile switching center (eMSC)
  • the eMSC provides an initial session protocol (Session Initial Protocol (SIP) interface) to interact with the IMS network, and the IMS network interacts with the CS network. It can be implemented by eMSC.
  • SIP Session Initial Protocol
  • the UE For a UE with multiple access modes, if the UE can only use one access mode at a certain time, it is performing a call service in the access mode of the 2/3G network, and the call service is at 2/ The 3G network is provided by the CS domain.
  • LTE Long Term Evolution
  • HSPA high speed packet access
  • UE and The network can provide some way for the call service that the UE is performing without being interrupted.
  • the call service is provided by the PS domain in these networks, the above capability may be referred to as the continuity of the single-standby terminal voice service switching from the CS domain to the PS domain, and may also be referred to as reverse single-standby service continuity (reverse Single).
  • Continuity Continuity (SRVCC) o Figure 1 is a flow chart of a method for implementing reverse single-standby business continuity according to the related art. As shown in FIG. 1, it is described that UE 1 and B UE 2 establish a call, and UE 1 establishes a call through a CS domain of a 2/3G network. Therefore, the UE 1 connected to the UE in the call media path is a CS media connection, and the UE 1 has an active PS service.
  • UE 1 and B UE 2 establish a call
  • UE 1 establishes a call through a CS domain of a 2/3G network. Therefore, the UE 1 connected to the UE in the call media path is a CS media connection, and the UE 1 has an active PS service.
  • the UE 1 When the UE 1 needs to change the PS ⁇ or the access mode of the LTE or HSPA, the UE 1 implements a process of reverse single-standby service continuity, where the following processing steps may be included:
  • the UE 1 passes The CS domain and the source network CS domain control entity, that is, the Mobile Switching Center (MSC) establishes a session with the UE 1, and the UE 1 also has an active PS service, for example: IMS registration, therefore, there is an active PS.
  • the service bearer connection the UE 1 sends a measurement report to the source network served by the UE, and reports the cell signal strength measurement information.
  • Step S102 The source network base station system serving the UE 1 determines the nearby information according to the signal strength information of each cell in the measurement report.
  • the PS target network is more suitable for serving the UE 1, and then determines to perform the handover operation, and the source network base station system sends a CS domain handover request to the MSC, for example: a handover request (Handover required) message;
  • Step S104 The MSC receives the handover request, and
  • the target network packet control entity (for example: MME or SGSN) initiates a CS to PS handover request, for example: Send CS to PS Forward Relocation
  • the request message carries a source to target transparent container, that is, carries all existing PS bearer information of the active side network;
  • Step S106 The MSC sends a handover preparation message to the handover control function, for example: SIP INFO message Notifying the handover control function that the rSRVCC process triggers; the handover control function controls the handover control gateway to reserve resources, and sends
  • Step S110 The target network control entity sends a handover request to the target network base station system (for example, an eNB or an RNC), for example, a handover request (Handover Request) message, where the message carries the step S108.
  • Step S112 Target The network control entity sends a CS to PS handover response message to the MSC, for example: sending a CS to PS Forward Relocation Response message;
  • the MSC sends a handover command to the source network base station system (eg, RNC or BSS), for example: sending a Handover Command message;
  • Step S116 The source network base station system sends a handover command to the UE 1, for example: Send Handover From
  • Step S118 The MSC sends an access handover request to the handover control entity, for example, a SIP INFO message, and the access control entity controls the access control gateway to the UE.
  • the target network sends the downlink media data, and opens the media resource reserved by the gateway.
  • Step S120 After the UE 1 accesses the target network, the UE 1 sends a handover notification message to the target network base station system, for example: sending a Handover Notify message; Step S122: Target network base station The system sends a handover notification message to the target network control network element.
  • the Bearer Request message is configured to enable the target network base station system to establish a bearer connection with the target data gateway through the target network service gateway.
  • Step S126 The target data gateway interacts with the policy control function, allowing the user to send and receive voice service data on the default bearer, and narrow the voice service. Data interruption time meets the cut Demand;
  • Step S128 The UE sends an IMS service continuity handover request to the handover control function, for example, sending a SIP INVITE message, where the message carries a reverse transfer mode identifier (STI).
  • STI reverse transfer mode identifier
  • Step S130-S132 Proxy call control function
  • a voice call dedicated bearer is established for the handover request; thus, an IMS media connection is established between the UE 1 and the UE 2, and the UE 1 and the data network gateway pass the target network base station system and the target network service.
  • the gateway establishes a bearer connection, so that UE 1 and UE 2 can continue to talk, and the PS service of UE 1 can continue.
  • non-DTM non-Dual Transfer Mode
  • the PS service of the U-U UE needs to be maintained (suspended) when the CS call is made.
  • the source network base station system cannot correctly generate a Source to Target Transparent Container, and may even be missing.
  • the target network base station system will reject the handover request, and the entire handover, that is, the single-standby service continuity process fails.
  • the present invention provides a method and system for reserving resource bearers, so as to at least solve the problem in the related art that if the source network base station system cannot correctly generate or delete the source to the target container, the single-standby service continuity process may fail.
  • a resource bearer reservation method is provided.
  • the resource bearer reservation method includes: the target network base station system receives the request message from the target network packet control entity, where the request message carries the source network base station system for indicating that the target network base station control entity uses the target network packet control entity
  • the packet exchange PS bearer information acquired by the network packet control entity performs resource bearer reservation indication information; the target network base station system performs resource bearer reservation according to the received PS bearer information according to the indication information.
  • the indication information carried in the request message is explicit identification information added by the target network packet control entity in the request message.
  • the request message is a handover request message, where the indication information carried in the handover request message is a source to a target container.
  • the method further includes: modifying, by the source network base station system, the source to the target container.
  • the modification to the source to the target container includes one of the following: setting a parameter value corresponding to the parameter name corresponding to the PS bearer information in the source to the target container to be empty; and setting a parameter corresponding to the PS bearer information in the source to the target container delete.
  • the target network base station system performs resource bearer reservation according to the received PS bearer information according to the indication information, including: the target network base station system acquires the source to the target container; and the target network base station system according to the modified source to the target container according to the indication
  • the PS bearer information carried in the request message is reserved for resource bearer.
  • the request message is a handover request message, where the indication information carried in the handover request message is that the handover request message does not carry an active to target container.
  • the method before the target network base station system receives the handover request message from the target network packet control entity, the method further includes: the source network base station system does not generate the source to the target container.
  • the target network base station system performs resource bearer reservation according to the received PS bearer information according to the indication information, including: the target network base station system does not acquire the source to the target container in the handover request message; and the target network base station system obtains the source according to the source
  • the indication to the target container performs resource bearer reservation according to the PS bearer information.
  • the request message is a resource reservation request message.
  • the source network base station system processes the source to the target container to include one of the following: the source to the target container and the PS bearer information
  • the parameter value corresponding to the related parameter name is set to null; the parameter related to the PS bearer information in the source to the target container is deleted; the source to the target container is not generated.
  • the target network base station system performs resource bearer reservation according to the received PS bearer information, including: the target network base station system acquires PS bearer information from the resource reservation request message; and the target network base station system performs resources according to the acquired PS bearer information. Bearer reservation.
  • the method further includes: the user equipment UE accessing the target network where the target network base station system is located, and sending the access response to the network entity of the target network.
  • the method further includes: the target network base station system receiving the handover confirmation message or the tracking area update request from the UE Message or Routing Area Update Request message; The target network base station system forwards the received handover confirmation message or tracking area update request message or routing area update request message to the target network packet control entity.
  • the resource reservation request message carries the indication information that uses the PS bearer information to perform resource bearer reservation.
  • the method further includes: the target network base station system receiving the handover confirmation message or tracking from the UE according to the indication information.
  • the area update request message or the routing area update request message; the target network base station system forwards the received handover confirm message or the tracking area update request message or the routing area update request message to the target network packet control entity.
  • a resource bearer reservation system is provided.
  • the resource bearer reservation system includes: a target network base station system; the target network base station system includes: a first receiving module, configured to receive a request message from a target network packet control entity, where the request message is carried in the request message Instructing the target network base station system to use the packet-switched PS bearer information acquired by the target network packet control entity from the source network packet control entity to perform resource bearer reservation indication information; the resource bearer reservation module is configured to follow the received information according to the received PS Bearer information for resource bearer reservation.
  • the indication information carried in the request message is explicit identification information added by the target network packet control entity in the request message.
  • the request message is a handover request message, where the indication information carried in the handover request message is a source to a target container.
  • the system further includes: a source network base station system; and the source network base station system includes: a modification module configured to modify the source to target container.
  • the modification to the source to the target container includes one of the following: setting a parameter value corresponding to the parameter name corresponding to the PS bearer information in the source to the target container to be empty; and setting a parameter corresponding to the PS bearer information in the source to the target container delete.
  • the resource bearer reservation module includes: a first acquiring unit, configured to acquire a source to a target container; and a first processing unit configured to perform resource bearer reservation according to the PS bearer information according to the modified source to target container indication.
  • the request message is a handover request message, where the indication information carried in the handover request message is that the handover request message does not carry an active to target container.
  • the source network base station system comprises: a processing module configured to not generate a source to the target container.
  • the resource bearer reservation module includes: a second acquiring unit, configured to not acquire the source to the target container in the handover request message; and the second processing unit is configured to follow the PS bearer according to the indication that the source to the target container is not obtained
  • the information is reserved for resource bearer.
  • the request message is a resource reservation request message.
  • the resource bearer reservation module includes: a third acquiring unit, configured to obtain PS bearer information from the resource reservation request message; and a third processing unit, configured to perform resource bearer reservation according to the acquired PS bearer information.
  • the system further includes: a user equipment UE ; the UE includes: an access module, configured to access a target network where the target network base station system is located; and a first sending module, configured to send an access response message to the network entity of the target network
  • the network entity of the target network includes: a target network base station system and a target network packet control entity, and the access response message includes one of the following: a handover confirmation message, a tracking area update request message, and a routing area update request message.
  • the target network base station system further includes: a second receiving module, configured to receive a handover confirm message or a tracking area update request message or a routing area update request message from the UE; and the second sending module is configured to receive the received handover
  • the acknowledgment message or tracking area update request message or routing area update request message is forwarded to the target network packet control entity.
  • the resource reservation request message carries the indication information that uses the PS bearer information to perform resource bearer reservation.
  • the second receiving module is further configured to receive a handover confirmation message or a tracking area update request message or a routing area update request message from the UE according to the indication information; the second sending module is further configured to receive the received handover confirmation message.
  • the tracking area update request message or the routing area update request message is forwarded to the target network packet control entity.
  • the packet bearer PS bearer information acquired by the target network packet control entity from the source network packet control entity is used for resource bearer reservation, and the solution is solved.
  • the single-service business continuity process may fail, thereby ensuring the success of the reverse single-standby service continuity in the turn DTM mode. carried out.
  • FIG. 1 is a flowchart of a method for implementing reverse single-standby service continuity according to the related art
  • FIG. 2 is a flowchart of a method for reserving resource bearers according to an embodiment of the present invention
  • FIG. 3 is a preferred embodiment according to the present invention.
  • FIG. 4 is a flowchart of a method for reverse single standby service continuity in a non DTM mode according to a second preferred embodiment of the present invention
  • FIG. 4 is a flowchart of a reverse single standby service continuity method in a non DTM mode according to a preferred embodiment of the present invention
  • 5 is a flowchart of a reverse single-standby service continuity method in a turn DTM mode according to a preferred embodiment 3 of the present invention
  • FIG. 6 is a structural block diagram of a resource bearer reservation system according to an embodiment of the present invention
  • FIG. 8 is a structural block diagram of a resource bearer reservation system according to a preferred embodiment 2 of the present invention
  • FIG. 9 is a block diagram of a resource bearer reservation system according to a preferred embodiment of the present invention.
  • the method may include the following processing steps: Step S202: The target network base station system receives a request message from a target network packet control entity, where the request message carries a target network for indicating that the target network base station system uses the target network. And indicating, by the packet control entity, the packet-switched PS bearer information obtained by the source network packet control entity to perform resource bearer reservation indication information; Step S204: The target network base station system performs resource bearer reservation according to the received PS bearer information according to the indication information.
  • Step S202 The target network base station system receives a request message from a target network packet control entity, where the request message carries a target network for indicating that the target network base station system uses the target network. And indicating, by the packet control entity, the packet-switched PS bearer information obtained by the source network packet control entity to perform resource bearer reservation indication information;
  • Step S204 The target network base station system performs resource bearer reservation according to the received PS bearer information according to the indication information.
  • the packet bearer PS bearer information acquired by the target network packet control entity from the source network packet control entity may be used for resource bearer reservation, which solves the problem that the source network base station system cannot correctly generate or delete the source to the target container in the related art.
  • the indication information carried in the request message may be explicit identification information added by the target network packet control entity in the request message.
  • the request message may be a handover request message, where the indication information carried in the handover request message may be a source to a target container.
  • the indication information carried in the handover request message may be a source to a target container.
  • the source network base station system may process the source to target transparent container to indicate that the target network base station system uses the PS bearer information acquired by the target network packet control entity from the source network packet control entity. Perform resource bearer reservation.
  • Step S1 The source network base station system modifies the source-to-target container.
  • the source network base station system sends a CS domain handover request to the MSC, for example: sending a handover request message; the source network base station system sets the parameter related to the PS bearer in the source to the target container to be empty due to the missing PS bearer information. Or do not carry related PS bearer parameters with missing information.
  • the foregoing modification to the source to the target container may include, but is not limited to, one of the following: Modifying one, setting a parameter value corresponding to the parameter name corresponding to the PS bearer information in the source to the target container to be empty;
  • the parameter corresponding to the PS bearer information usually includes two parts, that is, the parameter name and the parameter value corresponding to the parameter name.
  • the parameter name may be retained and the parameter corresponding to the parameter name may be retained. The value is set to null. Modify 2, delete the parameters corresponding to the PS bearer information from the source to the target container.
  • the deletion process may be performed on the parameters related to the PS bearer information in the source-to-target container, including the parameter name and the corresponding parameter value.
  • the target network base station system performs the resource bearer reservation according to the received PS bearer information according to the indication information, and may include the following operations: Step S2: the target network base station system acquires the source to the target container; Step S3: the target network The base station system performs resource bearer reservation according to the PS bearer information carried in the handover request message according to the modified source-to-target container indication.
  • the target network control entity may send a handover request message to the target network base station system, where the message carries the PS bearer information and the Source to Target Transparent Container existing on the source network side obtained from the source network packet control entity. If the target network base station system finds that the bearer information in the Source to Target Transparent Container is missing, the resource bearer reservation processing is performed according to the information in the Handover request (that is, the information in the Source to Target Transparent Container is ignored).
  • FIG. 3 is a flow chart of a method for reverse single standby service continuity in a non DTM mode in accordance with a preferred embodiment of the present invention. As shown in FIG.
  • the figure describes that a call is established between the UE 1 and the B UE 2, and the UE 1 establishes a call through the CS domain of the 2/3G network. Therefore, the CS 1 is connected to the UE 1 in the call media path.
  • the media connection at the same time, the UE 1 has a PS service that is suspend, for example: IMS registration, so there is a PS service bearer connection connected by suspend.
  • the source network base station system does not have such related information, and only remains in the source network packet control entity.
  • the UE 1 moves to the PS domain whose access mode needs to be changed to LTE or HSPA, the UE 1 implements the reverse single standby. The process of business continuity.
  • Step S302 The source network base station system serving the UE 1 determines that the nearby PS target network is more suitable for serving the UE 1 according to the signal strength information of each cell in the measurement report, and then determines to perform the handover operation.
  • the source network base station system sends a CS domain handover request to the MSC, for example: a Handover Required message; the source network base station system sets the parameters related to the PS bearer in the source to the target container to be empty, or not Carrying the relevant PS bearer parameter with the missing information; Step S304: The MSC receives the handover request, and initiates a CS to PS handover request to the target network packet control entity (for example, MME or SGSN), for example, sending a CS to PS Forward Relocation request, where The request message carries a Source to Target Transparent Container.
  • the target network packet control entity for example, MME or SGSN
  • Step S306 The MSC sends a handover preparation message to the handover control function, for example: a SIP INFO message, notifying the handover control function that the rSRVCC process triggers; and the handover control function controls the handover control gateway to reserve resources.
  • a handover preparation message for example: a SIP INFO message, notifying the handover control function that the rSRVCC process triggers; and the handover control function controls the handover control gateway to reserve resources.
  • Step S308 Target network group control entity Grouping control entities to the source network ( For example: SGSN) Sending a PS domain context request, for example: sending a PDP Context Request message; the source network packet control entity returns PS domain context information, for example: sending a PDP Context Response message carrying a PDP context;
  • Step S310 Target network control entity to target
  • the network base station system for example, the eNB or the RNC
  • sends a handover request for example, sends a Handover Request message, where the message carries the PS bearer information and the Source to Target existing on the source side acquired by the source network packet control entity in step S308.
  • the target network base station system finds that the bearer information in the Source to Target Transparent Container is missing, and performs bearer reservation according to the information in the Handover request (ie, ignores the information in the Source to Target Transparent Container), and then sends a handover response message, for example: Transmitting a Handover Response message; in the preferred embodiment, the target network packet control entity may also indicate in the Handover request message
  • the message of the UE is different from the message in the related art, and does not need to consider the bearer information in the Source to Target Transparent Container, for example: indicating that the message is a CS to PS SRVCC handover message;
  • Step S312 the target network control entity sends the CS to the PS to the MSC Switching the response message, for example: sending a CS to PS Forward Relocation Response message;
  • Step S314 The MSC sends a handover command to the source network base station system (for example, RNC or BSS), for example: sending a Handover Command message;
  • Step S316 The source network base station system sends a handover command to the UE 1, for example: sending a Handover From UTRAN message; After the network base station system sends the handover command, the media data sent to the UE 1 is processed in a discarding manner.
  • Step S318 The MSC sends an access handover request to the handover control entity, for example, a SIP INFO message, and the access control entity controls the access control gateway to the UE.
  • the target network sends the downlink media data, and opens the media resource reserved by the gateway.
  • Step S320 After the UE 1 accesses the target network, the UE 1 sends a handover notification message to the target network base station system, for example: sending a Handover Notify message; Step S322: Target network base station The system sends a handover notification message to the target network control network element.
  • Step S324 The target network control network element updates the bearer connection of the core network, for example: sending a Modify to the target data gateway (for example, PDN GW) through the target service gateway (for example, SGW) a Bearer Request message, so that the target network base station system establishes a bearer connection with the target data gateway through the target network service gateway;
  • Step S326 The target data gateway interacts with the policy control function, allowing the user to send and receive voice service data on the default bearer, and narrow the voice service.
  • Step S328 The UE sends an IMS service continuity handover request to the handover control function, for example: sending a SIP INVITE message, where the message carries a reverse transfer mode identifier (Session Transfer Identifier - reverse Single Radio) STI-rSR); STI-rSR is a routable identifier that points to the handover control function, and is sent to the UE by the handover control function during the IMS registration process in the source side PS domain before the UE;
  • Step S330-S332 Proxy call control function
  • a voice call dedicated bearer is established for the handover request; thus, an IMS media connection is established between the UE 1 and the UE 2, and the UE 1 and the data network gateway pass the target network base station system and the target network service.
  • the gateway establishes a bearer connection, so that UE 1 and UE 2 can continue to talk, and the PS service of UE 1 can continue. So far, an IMS media connection is established between the UE 1 and the UE 2, and the UE 1 and the data network gateway establish a bearer connection through the target network base station system and the target network serving gateway, so that the UE 1 and the UE 2 can continue to talk, UE 1
  • the PS business can continue.
  • the request message may be a handover request message, where the indication information carried in the handover request message may be that the handover request message does not carry an active to target container.
  • the source network base station system can directly adopt the processing mode of not generating the source to the target container, so as to indicate that the target network base station system uses the PS bearer information acquired by the target network packet control entity from the source network packet control entity for resource bearer. Reserved.
  • Step S1 The source network base station system does not generate the source to the target container.
  • the source network base station system sends a CS domain handover request to the MSC.
  • the source network base station system does not generate a source-to-target container because the PS bearer information is missing, that is, the Handover Required message may not carry the Source to Target Transparent Container.
  • the target network base station system performs the resource bearer reservation according to the received PS bearer information according to the indication information, and may include the following operations: Step S2: The target network base station system does not obtain the source to the target in the handover request message. a container; Step S3: The target network base station system performs resource bearer reservation according to the PS bearer information according to the indication that the source to the target container is not acquired.
  • the target network control entity sends a handover request message to the target network base station system, where the message carries the PS bearer information existing on the source side obtained from the source network packet control entity, and does not carry the Source to Target. Transparent Container;
  • the target network base station system finds that the Source to Target Transparent Container is missing, and the resource bearer reservation processing is performed according to the information in the Handover request (that is, the information in the Source to Target Transparent Container is ignored).
  • the figure describes that a call is established between the UE 1 and the UE 2, and the UE 1 establishes a call through the CS domain of the 2/3G network. Therefore, the UE connected to the UE 1 in the call media path is a CS.
  • Media connection while UE 1 has a PS service that is suspend, for example: IMS registration, so there is a PS that is suspend The service bears the connection, but the source network base station system does not have such related information, and only remains in the source network packet control entity; when the UE 1 moves to the PS domain whose access mode needs to change its use is LTE or HSPA, UE 1 implements Reverse the process of single business continuity.
  • Step S402 The source network base station system serving the UE 1 determines that the nearby PS target network is more suitable for serving the UE 1 according to the signal strength information of each cell in the measurement report, and then determines to perform the handover operation.
  • the source network base station system sends a CS domain handover request to the MSC, for example: a Handover Required message; the source network base station system does not generate a Source to Target Transparent Container, that is, the Handover The required message does not carry the Source to Target Transparent Container; Step S404: The MSC receives the handover request, and initiates a CS to PS handover request to the target network packet control entity (for example, MME or SGSN), for example: Send CS to PS Forward Relocation Request, wherein the request message does not carry a Source to Target Transparent Container; Step S406: The MSC sends a handover preparation message to the handover control function, for example: a SIP INFO message, notifying the handover control function rSRVCC process triggering; the handover control function controlling the handover control
  • the gateway reserves the resource, and sends the media information of the reserved resource to the MSC through a SIP INFO message, for example: switching the IP address and port number on the control gateway, and possibly carrying the media
  • the PS bearer information exists on the side, and does not carry the Source to Target Transparent Container; the target network base station system finds that the Source to Target Transparent Container is missing, and the Bay 1 J performs the information according to the Handover request (ie, ignores the information in the Source to Target Transparent Container). Carrying a reservation, and then transmitting a handover response message, for example: sending a Handover Response message; in a preferred embodiment, the target network packet control entity may also indicate in the Handover request message
  • the message of the UE is different from the message in the related art, and does not need to consider the Source to Target Transparent Container.
  • Carrying information in the bearer for example: indicating that the message is a CS to PS SRVCC handover message; the target network base station system considers only bearer information in the Handover request when reserving resources according to the indication information;
  • Step S412 Target network control entity to the MSC Sending a CS to PS handover response message, for example: sending a CS to PS Forward Relocation Response message;
  • Step S414 The MSC sends a handover command to the source network base station system (for example, RNC or BSS), for example: sending a Handover Command message;
  • Step S416 Source The network base station system sends a handover command to the UE 1, for example: sending a Handover From UTRAN message; after the source network base station system sends the handover command, the media data sent to the UE 1 is processed in a discard manner, because the UE 1 receives
  • Step S418 The MSC sends an access handover request to the handover control entity, for example, a SIP INFO message, and the access control entity controls the access control gateway to the UE.
  • the target network sends the downlink media data, and opens the media resource reserved by the gateway.
  • Step S420 After the UE 1 accesses the target network, the UE 1 sends a handover notification message to the target network base station system, for example: sending a Handover Notify message; Step S422: Target network base station The system sends a handover notification message to the target network control network element.
  • Step S424 The target network control network element updates the bearer connection of the core network, for example: sending a Modify to the target data gateway (for example, PDN GW) through the target service gateway (for example, SGW) a Bearer Request message, so that the target network base station system establishes a bearer connection with the target data gateway through the target network service gateway;
  • Step S426 The target data gateway interacts with the policy control function, allowing the user to send and receive voice service data on the default bearer, and narrow the voice service.
  • Step S428 The UE sends an IMS service continuity handover request to the handover control function, for example: sending a SIP INVITE message, where the message carries a reverse transfer mode identifier (Session Transfer Identifier - reverse Single Radio) STI-rSR); STI-rSR is a routable identifier that points to the handover control function, and is sent to the UE by the handover control function during the IMS registration process in the source side PS domain before the UE;
  • Step S430-S432 Proxy call control function Establishing a voice call dedicated bearer for the handover request by interacting with the policy control function; thus, establishing an IMS media connection between the UE 1 and the UE 2, and the UE 1 and The data network gateway establishes a bearer connection through the target network base station system and the target network serving gateway, so that the UE 1 and the UE 2 can continue to talk, and the PS service of the UE 1 can continue.
  • the request message may be a resource reservation request message.
  • the target network packet control entity may not send a handover request message to the target network base station system, but send a resource reservation request message to the target network base station system, and the target network base station system may carry the resource reservation request message.
  • the target network packet control entity obtains the resource bearer reservation from the PS bearer information acquired by the source network packet control entity.
  • Step S1 The source network base station system may include the source-to-target container It is not limited to one of the following: Processing mode 1: Set the parameter value corresponding to the parameter name related to the PS bearer information in the source to the target container to be empty; Processing mode 2: Delete the parameters related to the PS bearer information from the source to the target container. ; Processing method 3, the source to the target container is not generated.
  • the source network base station system may set the parameters related to the PS bearer in the source to the target container to be empty, or may not carry the related PS bearer parameters missing from the information, or may not generate the Source to The Target Transparent Container, that is, the Handover Required message does not carry the Source to Target Transparent Container 0.
  • the target network base station system performs resource bearer reservation according to the received PS bearer information, and may include the following operations: Step S2: Target The network base station system obtains the PS bearer information from the resource reservation request message.
  • Step S3 The target network base station system performs resource bearer reservation according to the acquired PS bearer information.
  • the target network control entity sends a resource reservation request to the target network base station system, for example: sending an S1 initial context setu message or an S1 bearer modification message, where the message carries the slave source network packet control entity
  • the obtained PS bearer information exists on the source network side; the target network base station system performs resource bearer reservation processing according to the bearer information carried in the resource reservation message.
  • the method may further include the following steps: Step S4: The UE accesses the target network where the target network base station system is located, and provides the network entity to the target network.
  • the network entity of the target network may include: a target network base station system and a target network packet control entity
  • the access response message may include, but is not limited to, one of the following: a handover confirmation message, a tracking area update request message, Routing area update request message.
  • Step S4 after the UE accesses the target network where the target network base station system is located, and sends the access response message to the network entity of the target network, the following operations may be further included: Step S5: The target network base station system receives the UE from the UE Handover confirmation message or tracking area update request message or routing area update request message; Step S6: The target network base station system forwards the received handover confirmation message or tracking area update request message or routing area update request message to the target network packet control entity .
  • the resource reservation request message may carry the indication information that uses the PS bearer information to perform resource bearer reservation.
  • step S4 after the UE accesses the target network where the target network base station system is located, and sends the access response message to the network entity of the target network, the method may further include the following steps: Step S5: The target network base station system receives according to the indication information. a handover confirmation message or a tracking area update request message or a routing area update request message from the UE; Step S6: The target network base station system forwards the received handover confirmation message or the tracking area update request message or the routing area update request message to the target network Group control entities.
  • Step S5 The target network base station system receives according to the indication information. a handover confirmation message or a tracking area update request message or a routing area update request message from the UE.
  • Step S6 The target network base station system forwards the received handover confirmation message or the tracking area update request message or the routing area update request message to the target network Group control entities.
  • FIG. 5 is a flow chart of a method for reverse single standby service continuity in a turn DTM mode in accordance with a preferred embodiment 3 of the present invention.
  • the figure describes that a call is established between the UE 1 and the UE 2, and the UE 1 establishes a call through the CS domain of the 2/3G network. Therefore, a CS is connected to the UE 1 in the call media path. Media connection, At the same time, the UE 1 has a PS service that is suspend, for example: IMS registration, so there is a PS service bearer connection that is suspended by Suspend.
  • the source network base station system does not have such related information, and only remains in the source network packet control entity.
  • Step S502 The source network base station system serving the UE 1 determines that the nearby PS target network is more suitable for serving the UE 1 according to the signal strength information of each cell in the measurement report, and then decides to perform the handover operation.
  • the source network base station system sends a CS domain handover request to the MSC, for example: a handover request message; the source network base station system associates the PS bearer in the source to target transparent container due to the missing PS bearer information.
  • the parameter is set to be empty, or does not carry the related PS bearer parameter whose information is missing, or the source network base station system does not generate a Source to Target Transparent Container, that is, the Handover required message does not carry the Source to Target Transparent Container;
  • Step S504 The MSC receives the handover request , grouping control entities to the target network (for example: MME or
  • Step S506 The MSC sends a handover preparation to the handover control function.
  • the message for example: SIP INFO message, notifies the handover control function that the rSRVCC process triggers; the handover control function controls the handover control gateway to reserve resources, and sends the media information of the reserved resource to the MSC through a SIP INFO message, for example: on the handover control gateway IP address and port number, and possible media codec used after handover;
  • the target network control entity sends a resource reservation request to the target network base station system (eg, eNB or RNC), for example : The SI initial context setu message or the SI bearer modification message is sent, where the message carries the PS bearer information existing on the source side acquired by the source network packet control entity in step S508; the target network
  • the target network packet control entity may also indicate in the resource reservation request message that the message of the target side base station system is different from the message in the related art, for example: indicating that the message is a CS to PS SRVCC handover message;
  • Step S512 The target network control entity sends a CS to PS handover response message to the MSC, for example: sending a CS to PS Forward Relocation Response message;
  • Step S514 The MSC sends a handover command to the source network base station system (for example, RNC or BSS), for example: Sending a Handover Command message;
  • Step S516 The source network base station system sends a handover command to the UE 1, for example: sending a Handover From UTRAN message; after the source network base station system sends the handover command, the media data sent to the UE 1 is discarded.
  • the method is processed. Because the UE 1 will disconnect the existing wireless connection after receiving the handover command, there is no way for the data to be sent to the UE 1.
  • the UE 1 modulates to the target network PS domain to access the target network.
  • Step S518 The MSC sends an access handover request to the handover control entity, for example, a SIP INFO message, and the access control entity controls the access control gateway to the UE.
  • the target network sends the downlink media data, and opens the media resource reserved by the gateway.
  • Step S520 After the UE 1 accesses the target network, the UE 1 sends a handover notification message to the target network base station system, for example, sends a Handover Notify message, or the UE 1 executes the tracking area.
  • Step S522 The target network base station system sends a handover notification message to the target network control network element, or the target network
  • the base station system forwards the TAU initiated by the UE 1 to the target network control network element, or the RAU;
  • Step S524 The target network controls the network element to update the bearer connection of the core network, for example: through the target service gateway (for example: SGW) to the target data gateway (for example : PDN GW) sends a Modify Bearer Request message to make the destination network
  • the base station system establishes a bearer connection with the target data gateway through the target network service gateway.
  • Step S526 The target data gateway interacts with the policy control function, allowing the user to send and receive voice service data on the default bearer, and reducing the interruption time of the voice service data to meet the handover requirement;
  • Step S528 The UE sends an IMS service continuity handover request to the handover control function, for example: sending a SIP INVITE message, where the message carries a reverse single mode handover session identifier (Session Transfer Identifier) - reverse Single Radio (STI-rSR); STI-rSR is a routable identifier that points to the handover control function.
  • the IMS registration process is performed by the handover control function in the process of performing IMS registration in the source-side PS domain before the UE.
  • Step S530- S532 The proxy call control function interacts with the policy control function to establish a voice call dedicated bearer for the handover request.
  • an IMS media connection is established between the UE 1 and the UE 2, and the UE 1 and the data network gateway pass the target network.
  • the base station system and the target network serving gateway establish a bearer connection, so that the UE 1 and the UE 2 can continue to talk, and the PS service of the UE 1 can continue.
  • an IMS media connection is established between the UE 1 and the UE 2, and the UE 1 and the data network gateway establish a bearer connection through the target network base station system and the target network serving gateway, so that the UE 1 and the UE 2 can continue to talk, UE 1 The PS business can continue.
  • FIG. 6 is a structural block diagram of a resource bearer reservation system according to an embodiment of the present invention.
  • the resource bearer reservation system may include: a target network base station system 10; the target network base station system 10 may include: a first receiving module 100, configured to receive a request message from a target network packet control entity, The request message carries indication information for indicating that the target network base station system uses the packet-switched PS bearer information acquired by the target network packet control entity from the source network packet control entity to perform resource bearer reservation; the resource bearer reservation module 102, The resource bearer reservation is performed according to the received PS bearer information according to the indication information.
  • the indication information carried in the request message may be explicit identification information added by the target network packet control entity in the request message.
  • the request message may be a handover request message, where the indication information carried in the handover request message may be a source to a target container.
  • the system may further include: a source network base station system 20; the source network base station system 20 may include: a modification module 200 configured to modify the source to target container.
  • the foregoing modification to the source to the target container may include, but is not limited to, one of the following: Modifying one, setting a parameter value corresponding to the parameter name corresponding to the PS bearer information in the source to the target container to be empty; And deleting the parameters corresponding to the PS bearer information from the source to the target container.
  • the resource bearer reservation module 102 may include: a first obtaining unit 1020 configured to acquire a source to a target container; and a first processing unit 1022 configured to follow the modified source to the target container. The resource bearer reservation is instructed according to the PS bearer information.
  • the request message may be a handover request message, where the indication information carried in the handover request message may be that the handover request message does not carry an active to target container.
  • the source network base station system 20 can include: a processing module 202 configured to not generate a source to target container.
  • the resource bearer reservation module 102 may include: a second obtaining unit 1024, configured to not acquire the source to target container in the handover request message; and the second processing unit 1026 is configured to not acquire The indication to the source to the target container performs resource bearer reservation based on the PS bearer information.
  • the request message may be a resource reservation request message.
  • the resource bearer reservation module 102 may include: a third obtaining unit 1028, configured to obtain PS bearer information from a resource reservation request message; and a third processing unit 1030, configured to obtain according to the obtained The PS bearer information is reserved for resource bearer.
  • the foregoing system may further include: a UE 30; the UE 30 may include: an access module
  • the first sending module 302 is configured to send an access response message to the network entity of the target network, where the network entity of the target network may include: a target network base station system and
  • the target network packet control entity may include, but is not limited to, one of the following: a handover confirmation message, a tracking area update request message, and a routing area update request message.
  • the target network base station system 10 may further include: a second receiving module 104, configured to receive a handover confirmation message or a tracking area update request message or a routing area update request message from the UE;
  • the sending module 106 is configured to forward the received handover confirm message or the tracking area update request message or the routing area update request message to the target network packet control entity.
  • the resource reservation request message may carry the indication information that uses the PS bearer information to perform resource bearer reservation.
  • the second receiving module 104 is further configured to receive a handover confirmation message or a tracking area update request message or a routing area update request message from the UE according to the indication information; the second sending module 106 is further configured to receive the received handover.
  • the acknowledgment message or tracking area update request message or routing area update request message is forwarded to the target network packet control entity.
  • the above embodiments achieve the following technical effects (it is required that these effects are achievable by some preferred embodiments): Guaranteed reverse single standby business continuity in non DTM mode Successful execution.
  • the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module.

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Abstract

本发明公开了一种资源承载的预留方法及系统,在上述方法中,目标网络基站系统接收来自于目标网络分组控制实体的请求消息,其中,该请求消息中携带有用于指示目标网络基站系统采用目标网络分组控制实体从源网络分组控制实体获取到的包交换PS承载信息进行资源承载预留的指示信息;目标网络基站系统按照指示信息根据接收到的PS承载信息进行资源承载预留。根据本发明提供的技术方案,达到了在non DTM模式下保证反向单待业务连续性成功执行。

Description

资源承载的预留方法及系统
技术领域 本发明涉及通信领域, 具体而言, 涉及一种资源承载的预留方法及系统。 背景技术 IP多媒体子系统(IP Multimedia Core Network Subsystem, 简称为 IMS)是由第三 代合作伙伴计划(3rd Generation Partnership Project, 简称为 3GPP)提出的一种基于网 络互联协议 (Internet Protocol, 简称为 IP) 的网络架构, 其构建了一个开放而又灵活 的业务环境, 支持多媒体应用, 能够为用户提供丰富多彩的多媒体业务。 在 IMS业务体系中, 控制层和业务层是相互分离的, 其中, 控制层不提供具体业 务, 仅向业务层提供必要的触发、 路由、 计费等功能。 控制层中业务触发和控制功能 是由呼叫会话控制功能 (Call Session Control Function, 简称为 CSCF) 完成的。 呼叫 会话控制功能可以分为以下三种类型: 类型一、 代理呼叫会话控制功能 (Proxy-CSCF, 简称为 P-CSCF); 类型二、 查询呼叫会话控制功能 (Interrogating-CSCF, 简称为 I-CSCF); 类型三、 服务呼叫会话控制功能 (Serving-CSCF, 简称为 S-CSCF); 其中, 负主要责任的是 S-CSCF, 而 I-CSCF则是可选的。 业务层是由一系列应用服务器 (Application Server, 简称为 AS) 组成的, 可以提 供具体业务服务。 AS可以是独立的实体,也可以存在于 S-CSCF中。控制层(S-CSCF) 根据用户的签约信息控制业务触发, 调用 AS上的业务, 实现业务功能。 会话中的端到端设备称为用户设备 (User Equipment, 简称为 UE), 负责与使用 者的交互, 有的 UE具有多种接入网络的方式, 其中, 可以包括: 通过 3GPP的包交 换(Packet Switch, 简称为 PS)域接入网络, 通过其他非 3GPP的 PS域接入网络, 甚 至可以通过电路交换 (Circuit Switch, 简称为 CS) 域接入网络。 如果 CS网络配置了增强移动交换中心 (enhanced Mobile Switch Center, 简称为 eMSC), 由 eMSC提供初始会话协议 (Session Initial Protocol, 简称为 SIP) 接口来与 IMS网络交互, 则 IMS网络与 CS网络的交互可以通过 eMSC来实现。 对于具有多种接入方式的 UE而言, 如果该 UE某时刻仅能使用一种接入方式, 则其在 2/3G网络的接入方式下正在执行通话业务,而该通话业务在 2/3G网络中由 CS 域提供。 当 UE移动至其他地区而需要改变其使用的接入方式为长期演进(Long Term Evolution,简称为 LTE)网络或高速分组接入(high speed packet access,简称为 HSPA) 网络接入时, UE和网络能提供某种方式使 UE正在执行的通话业务不被中断。然而由 于通话业务在这些网络中是由 PS 域提供的, 上述能力可以称为单待终端语音业务从 CS域切换到 PS域的连续性, 亦可简称为反向单待业务连续性 (reverse Single Radio Voice Call Continuity,简称为 rSRVCC),与之相对应地,如果是 UE从 LTE网络或 HSPA 网络移动至 2/3G网络, 则可以称为单待终端业务连续性,亦可简称为单待业务连续性 ( SRVCC ) o 图 1是根据相关技术的反向单待业务连续性实现方法流程图。 如图 1所示, 描述 了 UE 1禾 B UE 2间建立了通话, UE 1是通过 2/3G网络的 CS域建立通话的。 因此, 通话媒体路径中连接 UE 1的是一段 CS媒体连接, 同时 UE 1还有活动的 PS业务, 因 此, 存在活动的 PS业务承载连接。 当 UE 1移动需要改变其使用的接入方式为 LTE或 HSPA的 PS ±或, UE 1实现反向单待业务连续性的过程, 其中, 可以包括以下处理步 骤: 在相关技术中, UE 1通过 CS域及源网络 CS域控制实体,即移动交换中心(Mobile Switching Center, 简称为 MSC ) 与 UE 1建立会话, 同时 UE 1还有活动的 PS业务, 例如: IMS注册, 因此, 存在活动的 PS业务承载连接; UE 1向为其服务的源网络发 送测量报告, 以上报小区信号强度测量信息; 步骤 S 102: 为 UE 1服务的源网络基站系统根据测量报告中各小区信号强度信息 判断附近的 PS目标网络更适合为 UE 1服务, 于是决定执行切换操作, 源网络基站系 统向 MSC发送 CS域切换请求, 例如: 发送切换请求 (Handover required) 消息; 步骤 S 104: MSC收到切换请求,向目标网络分组控制实体(例如: MME或 SGSN) 发起 CS到 PS切换请求, 例如: 发送 CS to PS Forward Relocation request; 该 request 消息中携带有源至目标容器 Source to Target Transparent Container, 即携带有源侧网络 所有存在的 PS承载信息; 步骤 S 106: MSC向切换控制功能发送切换准备消息, 例如: SIP INFO消息, 通 知切换控制功能 rSRVCC过程触发; 切换控制功能控制切换控制网关预留资源, 并将 预留资源的媒体信息通过 SIP INFO消息发送至 MSC, 例如: 切换控制网关上的 IP地 址和端口号, 以及可能携带的切换后使用的媒体编解码; 步骤 S108: 目标网络分组控制实体向源网络分组控制实体 (例如: SGSN) 发送 获取 PS域上下文请求, 例如: 发送 PDP Context Request消息; 源网络分组控制实体 返回 PS域上下文信息, 例如: 发送 PDP Context Response消息携带 PDP上下文; 步骤 S110: 目标网络控制实体向目标网络基站系统 (例如: eNB或 RNC) 发送 切换请求, 例如: 发送切换请求(Handover Request)消息, 其中, 该消息中携带有由 步骤 S108从源网络分组控制实体获取的源侧存在的 PS承载信息以及 Source to Target Transparent Container; 目标网络基站系统根据相关技术预留资源, 然后发送切换响应 消息, 例如: 发送 Handover Response消息; 步骤 S112: 目标网络控制实体向 MSC发送 CS到 PS切换响应消息, 例如: 发送 CS to PS Forward Relocation Response消息; 步骤 S114: MSC向源网络基站系统(例如: RNC或 BSS)发送切换命令, 例如: 发送 Handover Command消息; 步骤 S116: 源网络基站系统向 UE 1发送切换命令, 例如: 发送 Handover From
UTRAN消息; 源网络基站系统发送切换命令后, 再收到发送给 UE 1的媒体数据都会 采取丢弃的方式进行处理, 因为 UE 1接收到切换命令后将断开已有的无线连接,数据 没有办法发送至 UE 1了。 UE 1接收到切换命令后,调制到目标网络 PS域接入目标网 络; 步骤 S118: MSC向切换控制实体发送接入切换请求, 例如: SIP INFO 消息, 接 入控制实体控制接入控制网关向 UE 目标网络发送下行媒体数据, 并打开网关预留的 媒体资源; 步骤 S120: UE 1接入目标网络后, 向目标网络基站系统发送切换通知消息, 例 如: 发送 Handover Notify消息; 步骤 S122: 目标网络基站系统向目标网络控制网元发送切换通知消息; 步骤 S124: 目标网络控制网元更新核心网的承载连接, 例如: 通过目标服务网关 (例如: SGW) 向目标数据网关(例如: PDN GW)发送 Modify Bearer Request消息, 以使目标网络基站系统通过目标网络服务网关与目标数据网关建立承载连接; 步骤 S126: 目标数据网关与策略控制功能进行交互, 允许用户在默认承载上收发 语音业务数据, 缩小语音业务数据中断时间满足切换的需求; 步骤 S 128 : UE向切换控制功能发送 IMS业务连续性切换请求, 例如: 发送 SIP INVITE消息,其中,该消息中携带有反向单模切换会话标识( Session Transfer Identifier - reverse Single Radio , 简称为 STI-rSR) ; STI-rSR为指向切换控制功能的可路由标识, 在 UE之前在源侧 PS域执行 IMS注册过程中, 由切换控制功能发送给 UE; 步骤 S 130- S 132 : 代理呼叫控制功能通过和策略控制功能交互, 为该切换请求建 立语音呼叫专有承载; 至此, 在 UE 1与 UE 2之间建立起 IMS媒体连接, 且 UE 1与 数据网络网关通过目标网络基站系统和目标网络服务网关建立起承载连接,使得 UE 1 与 UE 2能够继续通话, UE 1的 PS业务可以继续进行。 相关技术中, 如果 UE在源侧网络处于非双传输模式 (non Dual Transfer Mode, 简称为 non-DTM), 贝 U UE的 PS业务在进行 CS呼叫时需要被保持 (suspended) , 此 时在源侧目标网络基站系统上仅有当前用户的 CS呼叫承载信息而没有该用户的 PS承 载信息。 步骤 S 104 中源网络基站系统无法正确生成源至目标容器 (Source to Target Transparent Container ) , 甚至可能会缺失。 而在相关技术中, 如果 Source to Target Transparent Container缺失, 目标网络基站系统将拒绝上述切换请求, 导致整个切换即 单待业务连续性过程失败。 发明内容 本发明提供了一种资源承载的预留方法及系统, 以至少解决相关技术中在源网络 基站系统无法正确生成或者缺失源至目标容器的情况下, 会导致单待业务连续性过程 失败的问题。 根据本发明的一个方面, 提供了一种资源承载的预留方法。 根据本发明的资源承载的预留方法包括: 目标网络基站系统接收来自于目标网络 分组控制实体的请求消息, 其中, 该请求消息中携带有用于指示目标网络基站系统采 用目标网络分组控制实体从源网络分组控制实体获取到的包交换 PS 承载信息进行资 源承载预留的指示信息; 目标网络基站系统按照指示信息根据接收到的 PS 承载信息 进行资源承载预留。 优选地, 上述请求消息中携带的指示信息为目标网络分组控制实体在请求消息中 添加的显式标识信息。 优选地, 上述请求消息为切换请求消息, 其中, 该切换请求消息中携带的指示信 息为源至目标容器。 优选地, 在目标网络基站系统接收来自于目标网络分组控制实体的切换请求消息 之前, 还包括: 源网络基站系统对源至目标容器进行修改。 优选地, 对源至目标容器的修改包括以下之一: 将源至目标容器中与 PS 承载信 息对应的参数名称对应的参数值置为空; 将源至目标容器中与 PS 承载信息对应的参 数删除。 优选地, 目标网络基站系统按照指示信息根据接收到的 PS 承载信息进行资源承 载预留包括: 目标网络基站系统获取源至目标容器; 目标网络基站系统按照经过修改 的源至目标容器的指示根据切换请求消息中携带的 PS承载信息进行资源承载预留。 优选地, 上述请求消息为切换请求消息, 其中, 该切换请求消息中携带的指示信 息为切换请求消息中未携带有源至目标容器。 优选地, 在目标网络基站系统接收来自于目标网络分组控制实体的切换请求消息 之前, 还包括: 源网络基站系统未生成源至目标容器。 优选地, 目标网络基站系统按照指示信息根据接收到的 PS 承载信息进行资源承 载预留包括: 目标网络基站系统在切换请求消息中未获取到源至目标容器; 目标网络 基站系统按照未获取到源至目标容器的指示根据 PS承载信息进行资源承载预留。 优选地, 上述请求消息为资源预留请求消息。 优选地, 在目标网络基站系统接收来自于目标网络分组控制实体的资源预留请求 消息之前, 源网络基站系统对源至目标容器的处理包括以下之一: 将源至目标容器中 与 PS承载信息相关的参数名称对应的参数值置为空; 将源至目标容器中与 PS承载信 息相关的参数删除; 未生成源至目标容器。 优选地, 目标网络基站系统根据接收到的 PS 承载信息进行资源承载预留包括: 目标网络基站系统从资源预留请求消息中获取 PS 承载信息; 目标网络基站系统根据 获取到的 PS承载信息进行资源承载预留。 优选地, 在目标网络基站系统根据接收到的 PS承载信息进行资源承载预留之后, 还包括: 用户设备 UE接入目标网络基站系统所在的目标网络, 并向目标网络的网络 实体发送接入响应消息, 其中, 目标网络的网络实体包括: 目标网络基站系统和目标 网络分组控制实体, 接入响应消息包括以下之一: 切换确认消息、 跟踪区更新请求消 息、 路由区更新请求消息。 优选地, 在 UE接入目标网络基站系统所在的目标网络, 并向目标网络的网络实 体发送接入响应消息之后, 还包括: 目标网络基站系统接收来自于 UE的切换确认消 息或者跟踪区更新请求消息或者路由区更新请求消息; 目标网络基站系统将接收到的 切换确认消息或者跟踪区更新请求消息或者路由区更新请求消息转发至目标网络分组 控制实体。 优选地, 资源预留请求消息中携带有采用 PS 承载信息进行资源承载预留的指示 信息。 优选地, 在 UE接入目标网络基站系统所在的目标网络, 并向目标网络的网络实 体发送接入响应消息之后, 还包括: 目标网络基站系统根据指示信息接收来自于 UE 的切换确认消息或者跟踪区更新请求消息或者路由区更新请求消息; 目标网络基站系 统将接收到的切换确认消息或者跟踪区更新请求消息或者路由区更新请求消息转发至 目标网络分组控制实体。 根据本发明的另一方面, 提供了一种资源承载的预留系统。 根据本发明的资源承载的预留系统包括: 目标网络基站系统; 目标网络基站系统 包括: 第一接收模块, 设置为接收来自于目标网络分组控制实体的请求消息, 其中, 请求消息中携带有用于指示目标网络基站系统采用目标网络分组控制实体从源网络分 组控制实体获取到的包交换 PS 承载信息进行资源承载预留的指示信息; 资源承载预 留模块, 设置为按照指示信息根据接收到的 PS承载信息进行资源承载预留。 优选地, 上述请求消息中携带的指示信息为目标网络分组控制实体在请求消息中 添加的显式标识信息。 优选地, 上述请求消息为切换请求消息, 其中, 该切换请求消息中携带的指示信 息为源至目标容器。 优选地, 上述系统还包括: 源网络基站系统; 源网络基站系统包括: 修改模块, 设置为对源至目标容器进行修改。 优选地, 对源至目标容器的修改包括以下之一: 将源至目标容器中与 PS 承载信 息对应的参数名称对应的参数值置为空; 将源至目标容器中与 PS 承载信息对应的参 数删除。 优选地, 资源承载预留模块包括: 第一获取单元, 设置为获取源至目标容器; 第 一处理单元, 设置为按照经过修改的源至目标容器的指示根据 PS 承载信息进行资源 承载预留。 优选地, 上述请求消息为切换请求消息, 其中, 该切换请求消息中携带的指示信 息为切换请求消息中未携带有源至目标容器。 优选地, 源网络基站系统包括: 处理模块, 设置为不生成源至目标容器。 优选地, 资源承载预留模块包括: 第二获取单元, 设置为在切换请求消息中未获 取到源至目标容器; 第二处理单元, 设置为按照未获取到源至目标容器的指示根据 PS 承载信息进行资源承载预留。 优选地, 上述请求消息为资源预留请求消息。 优选地, 上述资源承载预留模块包括: 第三获取单元, 设置为从资源预留请求消 息中获取 PS承载信息; 第三处理单元, 设置为根据获取到的 PS承载信息进行资源承 载预留。 优选地, 上述系统还包括: 用户设备 UE; UE包括: 接入模块, 设置为接入目标 网络基站系统所在的目标网络; 第一发送模块, 设置为向目标网络的网络实体发送接 入响应消息, 其中, 目标网络的网络实体包括: 目标网络基站系统和目标网络分组控 制实体, 接入响应消息包括以下之一: 切换确认消息、 跟踪区更新请求消息、 路由区 更新请求消息。 优选地, 目标网络基站系统还包括: 第二接收模块, 设置为接收来自于 UE的切 换确认消息或者跟踪区更新请求消息或者路由区更新请求消息; 第二发送模块, 设置 为将接收到的切换确认消息或者跟踪区更新请求消息或者路由区更新请求消息转发至 目标网络分组控制实体。 优选地, 资源预留请求消息中携带有采用 PS 承载信息进行资源承载预留的指示 信息。 优选地, 第二接收模块, 还设置为根据指示信息接收来自于 UE的切换确认消息 或者跟踪区更新请求消息或者路由区更新请求消息; 第二发送模块, 还设置为将接收 到的切换确认消息或者跟踪区更新请求消息或者路由区更新请求消息转发至目标网络 分组控制实体。 通过本发明, 在源网络基站系统无法正确生成或者缺失源至目标容器的情况下, 采用目标网络分组控制实体从源网络分组控制实体获取到的包交换 PS 承载信息进行 资源承载预留, 解决了相关技术中在源网络基站系统无法正确生成或者缺失源至目标 容器的情况下, 会导致单待业务连续性过程失败的问题,进而达到了在 turn DTM模式 下保证反向单待业务连续性成功执行。 附图说明 此处所说明的附图用来提供对本发明的进一步理解, 构成本申请的一部分, 本发 明的示意性实施例及其说明用于解释本发明, 并不构成对本发明的不当限定。 在附图 中- 图 1是根据相关技术的反向单待业务连续性实现方法流程图; 图 2是根据本发明实施例的资源承载的预留方法的流程图; 图 3是根据本发明优选实施例一的在 turn DTM模式下反向单待业务连续性方法的 流程图; 图 4是根据本发明优选实施例二的在 non DTM模式下反向单待业务连续性方法的 流程图; 图 5是根据本发明优选实施例三的在 turn DTM模式下反向单待业务连续性方法的 流程图; 图 6是根据本发明实施例的资源承载的预留系统的结构框图; 图 7是根据本发明优选实施例一的资源承载的预留系统的结构框图; 图 8是根据本发明优选实施例二的资源承载的预留系统的结构框图; 以及 图 9是根据本发明优选实施例三的资源承载的预留系统的结构框图。 具体实施方式 下文中将参考附图并结合实施例来详细说明本发明。 需要说明的是, 在不冲突的 情况下, 本申请中的实施例及实施例中的特征可以相互组合。 图 2是根据本发明实施例的资源承载的预留方法的流程图。 如图 2所示, 该方法 可以包括以下处理步骤: 步骤 S202 : 目标网络基站系统接收来自于目标网络分组控制实体的请求消息, 其 中, 该请求消息中携带有用于指示目标网络基站系统采用目标网络分组控制实体从源 网络分组控制实体获取到的包交换 PS承载信息进行资源承载预留的指示信息; 步骤 S204 : 目标网络基站系统按照指示信息根据接收到的 PS承载信息进行资源 承载预留。 相关技术中, 在源网络基站系统无法正确生成或者缺失源至目标容器的情况下, 会导致单待业务连续性过程失败。采用如图 2所示的方法, 在 IP多媒体子系统中的单 待终端语音业务从 CS域切换到 PS域的资源预留过程中,如果源网络基站系统无法正 确生成或者缺失源至目标容器, 则可以采用目标网络分组控制实体从源网络分组控制 实体获取到的包交换 PS 承载信息进行资源承载预留, 解决了相关技术中在源网络基 站系统无法正确生成或者缺失源至目标容器的情况下, 会导致单待业务连续性过程失 败的问题, 进而达到了在 non DTM模式下保证反向单待业务连续性成功执行。 在优选实施过程中, 上述请求消息中携带的指示信息可以为目标网络分组控制实 体在请求消息中添加的显式标识信息。 优选地, 上述请求消息可以为切换请求消息, 其中, 该切换请求消息中携带的指 示信息可以为源至目标容器。 在优选实施例中, 在 UE和源网络均处于 non DTM模式的情况下, 源网络基站系 统上仅存在与当前 CS语音相关的承载信息, 而没有任何其他的 PS承载信息。 由于 PS承载信息缺失, 源网络基站系统可以对源至目标容器 ( Source to Target Transparent Container) 进行处理, 以指示目标网络基站系统采用目标网络分组控制实体从源网络 分组控制实体获取到的 PS承载信息进行资源承载预留。 优选地, 在步骤 S202, 目标网络基站系统接收来自于目标网络分组控制实体的切 换请求消息之前, 还可以包括以下处理: 步骤 S 1 : 源网络基站系统对源至目标容器进行修改。 在优选实施例中, 源网络基站系统向 MSC发送 CS域切换请求, 例如: 发送切换 请求消息; 由于 PS承载信息缺失, 源网络基站系统将源至目标容器中 PS承载相关的 参数设置为空, 或者不携带信息缺失的相关 PS承载参数。 在优选实施过程中, 上述对源至目标容器的修改可以包括但不限于以下之一: 修改一、 将源至目标容器中与 PS承载信息对应的参数名称对应的参数值置为空; 在优选实施例中, 与 PS 承载信息对应的参数通常包括两部分, 即参数名称和该 参数名称对应的参数值, 在对源至目标容器进行修改时, 可以保留参数名称而将与参 数名称对应的参数值置为空。 修改二、 将源至目标容器中与 PS承载信息对应的参数删除。 在优选实施例中, 可以将源至目标容器中与 PS 承载信息相关的参数, 包括参数 名称和对应的参数值均执行删除处理。 优选地, 在步骤 S204中, 目标网络基站系统按照指示信息根据接收到的 PS承载 信息进行资源承载预留可以包括以下操作: 步骤 S2 : 目标网络基站系统获取源至目标容器; 步骤 S3 : 目标网络基站系统按照经过修改的源至目标容器的指示根据切换请求消 息中携带的 PS承载信息进行资源承载预留。 在优选实施例中,目标网络控制实体可以向目标网络基站系统发送切换请求消息, 其中, 该消息中携带有从源网络分组控制实体获取的源网络侧存在的 PS 承载信息以 及 Source to Target Transparent Container; 目标网络基站系统发现 Source to Target Transparent Container 中承载信息缺失, 则根据 Handover request 中的信息 (即忽略 Source to Target Transparent Container中的信息) 进行资源承载预留处理。 下面结合图 3所示的优选实施例对上述优选实施过程做进一步的描述。 图 3是根据本发明优选实施例一的在 non DTM模式下反向单待业务连续性方法的 流程图。 如图 3所示, 该图描述了在 UE 1禾 B UE 2之间建立通话, UE 1是通过 2/3G 网络的 CS域建立通话的, 因此, 通话媒体路径中连接 UE 1的是一段 CS媒体连接, 同时 UE 1还有被 suspend的 PS业务, 例如: IMS注册, 故而存在被 suspend 的 PS 业务承载连接。 但是源网络基站系统上并没有此类相关信息, 仅保留在源网络分组控 制实体; 当 UE 1移动至需要改变其使用的接入方式为 LTE或 HSPA的 PS域, UE 1 实现反向单待业务连续性的过程。 由于此时 UE 1和网络均处于 non DTM模式, 所以 实际源网络基站系统上仅有当前 CS语音相关的承载信息,没有任何其他的 PS承载信 息。 UE 1向为其服务的源网络发送测量报告, 以上报小区信号强度测量信息。 该流程 可以包括以下操作步骤: 步骤 S302: 为 UE 1服务的源网络基站系统根据测量报告中各小区信号强度信息 判断附近的 PS目标网络更适合为 UE 1服务, 于是决定执行切换操作。 源网络基站系 统向 MSC发送 CS域切换请求, 例如: 发送切换请求 (Handover required) 消息; 由 于 PS承载信息缺失,源网络基站系统将源至目标容器中 PS承载相关的参数设置为空, 或者不携带信息缺失的相关 PS承载参数; 步骤 S304: MSC 接收到切换请求, 向目标网络分组控制实体 (例如: MME 或 SGSN) 发起 CS到 PS的切换请求, 例如: 发送 CS to PS Forward Relocation request, 其中, 该 request消息中携带有 Source to Target Transparent Container; 步骤 S306: MSC向切换控制功能发送切换准备消息, 例如: SIP INFO消息, 通 知切换控制功能 rSRVCC过程触发; 切换控制功能控制切换控制网关预留资源, 并将 预留资源的媒体信息通过 SIP INFO消息发送至 MSC, 例如: 切换控制网关上的 IP地 址和端口号, 以及可能携带的切换后使用的媒体编解码; 步骤 S308: 目标网络分组控制实体向源网络分组控制实体 (例如: SGSN) 发送 获取 PS域上下文请求, 例如: 发送 PDP Context Request消息; 源网络分组控制实体 返回 PS域上下文信息, 例如: 发送 PDP Context Response消息携带 PDP上下文; 步骤 S310: 目标网络控制实体向目标网络基站系统 (例如: eNB或 RNC) 发送 切换请求, 例如: 发送 Handover Request消息, 其中, 该消息中携带有由步骤 S308 从源网络分组控制实体获取的源侧存在的 PS 承载信息以及 Source to Target Transparent Container; 目标网络基站系统发现 Source to Target Transparent Container中 承载信息缺失, 则根据 Handover request中的信息(即忽略 Source to Target Transparent Container 中的信息) 进行承载预留, 然后发送切换响应消息, 例如: 发送 Handover Response消息; 在该优选实施例中,目标网络分组控制实体也可在此 Handover request消息中指示
UE该消息与相关技术中的消息不同,不需要考虑 Source to Target Transparent Container 中的承载信息, 例如: 指示该消息为 CS to PS SRVCC切换消息; 步骤 S312: 目标网络控制实体向 MSC发送 CS到 PS切换响应消息, 例如: 发送 CS to PS Forward Relocation Response消息; 步骤 S314: MSC向源网络基站系统(例如: RNC或 BSS)发送切换命令, 例如: 发送 Handover Command消息; 步骤 S316: 源网络基站系统向 UE 1发送切换命令, 例如: 发送 Handover From UTRAN消息; 源网络基站系统发送切换命令后, 再收到发送给 UE 1的媒体数据都会 采取丢弃的方式进行处理, 因为 UE 1接收到切换命令后将断开已有的无线连接,数据 没有办法发送至 UE 1了。 UE 1接收到切换命令后,调制到目标网络 PS域接入目标网 络; 步骤 S318: MSC向切换控制实体发送接入切换请求, 例如: SIP INFO 消息, 接 入控制实体控制接入控制网关向 UE 目标网络发送下行媒体数据, 并打开网关预留的 媒体资源; 步骤 S320: UE 1接入目标网络后, 向目标网络基站系统发送切换通知消息, 例 如: 发送 Handover Notify消息; 步骤 S322: 目标网络基站系统向目标网络控制网元发送切换通知消息; 步骤 S324: 目标网络控制网元更新核心网的承载连接, 例如: 通过目标服务网关 (例如: SGW) 向目标数据网关(例如: PDN GW)发送 Modify Bearer Request消息, 以使目标网络基站系统通过目标网络服务网关与目标数据网关建立承载连接; 步骤 S326: 目标数据网关与策略控制功能进行交互, 允许用户在默认承载上收发 语音业务数据, 缩小语音业务数据中断时间满足切换的需求; 步骤 S328: UE向切换控制功能发送 IMS业务连续性切换请求, 例如: 发送 SIP INVITE消息,其中,该消息中携带有反向单模切换会话标识( Session Transfer Identifier - reverse Single Radio, 简称为 STI-rSR); STI-rSR为指向切换控制功能的可路由标识, 在 UE之前在源侧 PS域执行 IMS注册过程中, 由切换控制功能发送给 UE; 步骤 S330- S332: 代理呼叫控制功能通过和策略控制功能交互, 为该切换请求建 立语音呼叫专有承载; 至此, 在 UE 1与 UE 2之间建立起 IMS媒体连接, 且 UE 1与 数据网络网关通过目标网络基站系统和目标网络服务网关建立起承载连接,使得 UE 1 与 UE 2能够继续通话, UE 1的 PS业务可以继续进行。 至此, 在 UE 1与 UE 2之间建立起 IMS媒体连接, 且 UE 1与数据网络网关通过 目标网络基站系统和目标网络服务网关建立起承载连接, 使得 UE 1与 UE 2能够继续 通话, UE 1的 PS业务可以继续进行。 优选地, 上述请求消息可以为切换请求消息, 其中, 该切换请求消息中携带的指 示信息可以为切换请求消息中未携带有源至目标容器。 在优选实施例中, 在 UE和源网络均处于 non DTM模式的情况下, 源网络基站系 统上仅存在与当前 CS语音相关的承载信息, 而没有任何其他的 PS承载信息。 由于 PS承载信息缺失, 源网络基站系统可以直接采用不生成源至目标容器的处理方式, 以 指示目标网络基站系统采用目标网络分组控制实体从源网络分组控制实体获取到的 PS承载信息进行资源承载预留。 优选地, 在步骤 S202, 目标网络基站系统接收来自于目标网络分组控制实体的切 换请求消息之前, 还可以包括以下处理: 步骤 S1 : 源网络基站系统未生成源至目标容器。 在优选实施例中, 源网络基站系统向 MSC发送 CS域切换请求; 由于 PS承载信 息缺失, 源网络基站系统不生成源至目标容器, 即该 Handover required消息中可以不 携带有 Source to Target Transparent Container。 优选地, 在步骤 S204中, 目标网络基站系统按照指示信息根据接收到的 PS承载 信息进行资源承载预留可以包括以下操作: 步骤 S2: 目标网络基站系统在切换请求消息中未获取到源至目标容器; 步骤 S3 : 目标网络基站系统按照未获取到源至目标容器的指示根据 PS承载信息 进行资源承载预留。 在优选实施例中, 目标网络控制实体向目标网络基站系统发送切换请求消息, 其 中, 该消息中携带有从源网络分组控制实体获取的源侧存在的 PS 承载信息, 而不携 带有 Source to Target Transparent Container; 目标网络基站系统发现 Source to Target Transparent Container缺失,贝 lj根据 Handover request中的信息(即忽略 Source to Target Transparent Container中的信息) 进行资源承载预留处理。 下面结合图 4所示的优选实施例对上述优选实施过程做进一步的描述。 图 4是根据本发明优选实施例二的在 non DTM模式下反向单待业务连续性方法的 流程图。 如图 4所示, 该图描述了在 UE 1禾 B UE 2之间建立通话, UE 1是通过 2/3G 网络的 CS域建立通话的, 因此, 通话媒体路径中连接 UE 1的是一段 CS媒体连接, 同时 UE 1还有被 suspend的 PS业务, 例如: IMS注册, 故而存在被 suspend 的 PS 业务承载连接, 但是源网络基站系统上并没有此类相关信息, 仅保留在源网络分组控 制实体; 当 UE 1移动至需要改变其使用的接入方式为 LTE或 HSPA的 PS域, UE 1 实现反向单待业务连续性的过程。 由于此时 UE 1和网络均处于 non DTM模式, 所以 实际源网络基站系统上仅有当前 CS语音相关的承载信息,没有任何其他的 PS承载信 息; UE 1向为其服务的源网络发送测量报告, 以上报小区信号强度测量信息。 该流程 可以包括以下操作步骤: 步骤 S402 : 为 UE 1服务的源网络基站系统根据测量报告中各小区信号强度信息 判断附近的 PS目标网络更适合为 UE 1服务, 于是决定执行切换操作。 源网络基站系 统向 MSC发送 CS域切换请求, 例如: 发送切换请求 (Handover required) 消息; 由 于 PS承载信息缺失,源网络基站系统不生成源至目标容器( Source to Target Transparent Container ) , 即该 Handover required 消息中不携带有 Source to Target Transparent Container; 步骤 S404 : MSC 接收到切换请求, 向目标网络分组控制实体 (例如: MME 或 SGSN ) 发起 CS到 PS的切换请求, 例如: 发送 CS to PS Forward Relocation request, 其中, 该 request消息中不携带有 Source to Target Transparent Container; 步骤 S406 : MSC向切换控制功能发送切换准备消息, 例如: SIP INFO消息, 通 知切换控制功能 rSRVCC过程触发; 切换控制功能控制切换控制网关预留资源, 并将 预留资源的媒体信息通过 SIP INFO消息发送至 MSC, 例如: 切换控制网关上的 IP地 址和端口号, 以及可能携带的切换后使用的媒体编解码; 步骤 S408 : 目标网络分组控制实体向源网络分组控制实体 (例如: SGSN ) 发送 获取 PS域上下文请求, 例如: 发送 PDP Context Request消息; 源网络分组控制实体 返回 PS域上下文信息, 例如: 发送 PDP Context Response消息携带 PDP上下文; 步骤 S410 : 目标网络控制实体向目标网络基站系统 (例如: eNB或 RNC ) 发送 切换请求, 例如: 发送 Handover Request消息, 其中, 该消息中携带有由步骤 S408 从源网络分组控制实体获取的源侧存在的 PS 承载信息, 而不携带 Source to Target Transparent Container; 目标网络基站系统发现 Source to Target Transparent Container缺 失, 贝1 J根据 Handover request中的信息 (即忽略 Source to Target Transparent Container 中的信息) 进行承载预留, 然后发送切换响应消息, 例如: 发送 Handover Response 消息; 在优选实施例中, 目标网络分组控制实体也可在此 Handover request消息中指示
UE该消息与相关技术中的消息不同,不需要考虑 Source to Target Transparent Container 中的承载信息, 例如: 指示该消息为 CS to PS SRVCC切换消息; 目标网络基站系统根 据该指示信息, 在预留资源时仅考虑 Handover request中的承载信息; 步骤 S412: 目标网络控制实体向 MSC发送 CS到 PS切换响应消息, 例如: 发送 CS to PS Forward Relocation Response消息; 步骤 S414: MSC向源网络基站系统(例如: RNC或 BSS)发送切换命令, 例如: 发送 Handover Command消息; 步骤 S416: 源网络基站系统向 UE 1发送切换命令, 例如: 发送 Handover From UTRAN消息; 源网络基站系统发送切换命令后, 再收到发送给 UE 1的媒体数据都会 采取丢弃的方式进行处理, 因为 UE 1接收到切换命令后将断开已有的无线连接,数据 没有办法发送至 UE 1了。 UE 1接收到切换命令后,调制到目标网络 PS域接入目标网 络; 步骤 S418: MSC向切换控制实体发送接入切换请求, 例如: SIP INFO 消息, 接 入控制实体控制接入控制网关向 UE 目标网络发送下行媒体数据, 并打开网关预留的 媒体资源; 步骤 S420: UE 1接入目标网络后, 向目标网络基站系统发送切换通知消息, 例 如: 发送 Handover Notify消息; 步骤 S422: 目标网络基站系统向目标网络控制网元发送切换通知消息; 步骤 S424: 目标网络控制网元更新核心网的承载连接, 例如: 通过目标服务网关 (例如: SGW) 向目标数据网关(例如: PDN GW)发送 Modify Bearer Request消息, 以使目标网络基站系统通过目标网络服务网关与目标数据网关建立承载连接; 步骤 S426: 目标数据网关与策略控制功能进行交互, 允许用户在默认承载上收发 语音业务数据, 缩小语音业务数据中断时间满足切换的需求; 步骤 S428: UE向切换控制功能发送 IMS业务连续性切换请求, 例如: 发送 SIP INVITE消息,其中,该消息中携带有反向单模切换会话标识( Session Transfer Identifier - reverse Single Radio, 简称为 STI-rSR); STI-rSR为指向切换控制功能的可路由标识, 在 UE之前在源侧 PS域执行 IMS注册过程中, 由切换控制功能发送给 UE; 步骤 S430- S432: 代理呼叫控制功能通过和策略控制功能交互, 为该切换请求建 立语音呼叫专有承载; 至此, 在 UE 1与 UE 2之间建立起 IMS媒体连接, 且 UE 1与 数据网络网关通过目标网络基站系统和目标网络服务网关建立起承载连接,使得 UE 1 与 UE 2能够继续通话, UE 1的 PS业务可以继续进行。 至此, 在 UE 1与 UE 2之间建立起 IMS媒体连接, 且 UE 1与数据网络网关通过 目标网络基站系统和目标网络服务网关建立起承载连接, 使得 UE 1与 UE 2能够继续 通话, UE 1的 PS业务可以继续进行。 优选地, 上述请求消息可以为资源预留请求消息。 在优选实施例中, 目标网络分组控制实体可以不向目标网络基站系统发送切换请 求消息, 而是向目标网络基站系统发送资源预留请求消息, 目标网络基站系统可以采 用资源预留请求消息中携带的目标网络分组控制实体从源网络分组控制实体获取到的 PS承载信息进行资源承载预留。 优选地, 在步骤 S202, 目标网络基站系统接收来自于目标网络分组控制实体的资 源预留请求消息之前, 还可以包括以下处理: 步骤 S1 : 源网络基站系统对源至目标容器的处理可以包括但不限于以下之一: 处理方式一、 将源至目标容器中与 PS 承载信息相关的参数名称对应的参数值置 为空; 处理方式二、 将源至目标容器中与 PS承载信息相关的参数删除; 处理方式三、 未生成源至目标容器。 在优选实施例中, 由于 PS 承载信息缺失, 源网络基站系统可以将源至目标容器 中 PS承载相关的参数设置为空, 也可以不携带信息缺失的相关 PS承载参数, 还可以 不生成 Source to Target Transparent Container,即 Handover required消息中不携带 Source to Target Transparent Container 0 优选地, 在步骤 S204中, 目标网络基站系统根据接收到的 PS承载信息进行资源 承载预留可以包括以下操作: 步骤 S2: 目标网络基站系统从资源预留请求消息中获取 PS承载信息; 步骤 S3: 目标网络基站系统根据获取到的 PS承载信息进行资源承载预留。 在优选实施例中, 目标网络控制实体向目标网络基站系统发送资源预留请求, 例 如: 发送 S 1 initial context setu 消息或者 S 1 bearer modification消息, 其中, 该消息中 携带有从源网络分组控制实体获取的源网络侧存在的 PS 承载信息; 目标网络基站系 统根据资源预留消息中携带的承载信息进行资源承载预留处理。 优选地, 在目标网络基站系统根据接收到的 PS承载信息进行资源承载预留之后, 还可以包括以下步骤: 步骤 S4: UE接入目标网络基站系统所在的目标网络, 并向目标网络的网络实体 发送接入响应消息, 其中, 目标网络的网络实体可以包括: 目标网络基站系统和目标 网络分组控制实体, 接入响应消息可以包括但不限于以下之一: 切换确认消息、 跟踪 区更新请求消息、 路由区更新请求消息。 优选地, 在步骤 S4, UE接入目标网络基站系统所在的目标网络, 并向目标网络 的网络实体发送接入响应消息之后, 还可以包括以下操作: 步骤 S5: 目标网络基站系统接收来自于 UE的切换确认消息或者跟踪区更新请求 消息或者路由区更新请求消息; 步骤 S6: 目标网络基站系统将接收到的切换确认消息或者跟踪区更新请求消息或 者路由区更新请求消息转发至目标网络分组控制实体。 在优选实施过程中, 资源预留请求消息中可以携带有采用 PS 承载信息进行资源 承载预留的指示信息。 优选地, 在步骤 S4, UE接入目标网络基站系统所在的目标网络, 并向目标网络 的网络实体发送接入响应消息之后, 还可以包括以下步骤: 步骤 S5: 目标网络基站系统根据指示信息接收来自于 UE的切换确认消息或者跟 踪区更新请求消息或者路由区更新请求消息; 步骤 S6: 目标网络基站系统将接收到的切换确认消息或者跟踪区更新请求消息或 者路由区更新请求消息转发至目标网络分组控制实体。 下面结合图 5所示的优选实施例对上述优选实施过程做进一步的描述。 图 5是根据本发明优选实施例三的在 turn DTM模式下反向单待业务连续性方法的 流程图。 如图 5所示, 该图描述了在 UE 1禾 B UE 2之间建立通话, UE 1是通过 2/3G 网络的 CS域建立通话的, 因此, 通话媒体路径中连接 UE 1的是一段 CS媒体连接, 同时 UE 1还有被 suspend的 PS业务, 例如: IMS注册, 故而存在被 suspend 的 PS 业务承载连接。 但是源网络基站系统上并没有此类相关信息, 仅保留在源网络分组控 制实体; 当 UE 1移动至需要改变其使用的接入方式为 LTE或 HSPA的 PS域, UE 1 实现反向单待业务连续性的过程。 由于此时 UE 1和网络均处于 non DTM模式, 所以 实际源网络基站系统上仅有当前 CS语音相关的承载信息,没有任何其他的 PS承载信 息。 UE 1向为其服务的源网络发送测量报告, 以上报小区信号强度测量信息。 该流程 可以包括以下操作步骤: 步骤 S502 : 为 UE 1服务的源网络基站系统根据测量报告中各小区信号强度信息 判断附近的 PS目标网络更适合为 UE 1服务, 于是决定执行切换操作。 源网络基站系 统向 MSC发送 CS域切换请求, 例如: 发送切换请求 (Handover required) 消息; 由 于 PS承载信息缺失, 源网络基站系统将源至目标容器 (Source to Target Transparent Container)中 PS承载相关的参数设置为空,或者不携带信息缺失的相关 PS承载参数, 或者源网络基站系统不生成 Source to Target Transparent Container,即 Handover required 消息中不携带 Source to Target Transparent Container; 步骤 S504 : MSC 接收到切换请求, 向目标网络分组控制实体 (例如: MME 或
SGSN ) 发起 CS到 PS的切换请求, 例如: 发送 CS to PS Forward Relocation request, 其中, 根据步骤 S502, 该 request 消息中可能携带有 Source to Target Transparent Container; 步骤 S506 : MSC向切换控制功能发送切换准备消息, 例如: SIP INFO消息, 通 知切换控制功能 rSRVCC过程触发; 切换控制功能控制切换控制网关预留资源, 并将 预留资源的媒体信息通过 SIP INFO消息发送至 MSC, 例如: 切换控制网关上的 IP地 址和端口号, 以及可能携带的切换后使用的媒体编解码; 步骤 S508 : 目标网络分组控制实体向源网络分组控制实体 (例如: SGSN ) 发送 获取 PS域上下文请求, 例如: 发送 PDP Context Request消息; 源网络分组控制实体 返回 PS域上下文信息, 例如: 发送 PDP Context Response消息携带 PDP上下文; 步骤 S510 : 目标网络控制实体向目标网络基站系统 (例如: eNB或 RNC ) 发送 资源预留请求,例如:发送 S I initial context setu 消息或者 S I bearer modification消息, 其中, 该消息中携带有由步骤 S508从源网络分组控制实体获取的源侧存在的 PS承载 信息; 目标网络基站系统根据资源预留消息中携带的承载信息进行承载预留, 然后发 送切换响应消息, 例如: 发送资源预留请求响应消息; 在该优选实施例中, 目标网络分组控制实体也可以在该资源预留请求消息中指示 目标侧基站系统该消息与相关技术中的消息不同, 例如: 指示该消息为 CS to PS SRVCC切换消息; 步骤 S512: 目标网络控制实体向 MSC发送 CS到 PS切换响应消息, 例如: 发送 CS to PS Forward Relocation Response消息; 步骤 S514: MSC向源网络基站系统(例如: RNC或 BSS )发送切换命令, 例如: 发送 Handover Command消息; 步骤 S516: 源网络基站系统向 UE 1发送切换命令, 例如: 发送 Handover From UTRAN消息; 源网络基站系统发送切换命令后, 再收到发送给 UE 1的媒体数据都会 采取丢弃的方式进行处理, 因为 UE 1接收到切换命令后将断开已有的无线连接,数据 没有办法发送至 UE 1了。 UE 1接收到切换命令后,调制到目标网络 PS域接入目标网 络; 步骤 S518 : MSC向切换控制实体发送接入切换请求, 例如: SIP INFO 消息, 接 入控制实体控制接入控制网关向 UE 目标网络发送下行媒体数据, 并打开网关预留的 媒体资源; 步骤 S520: UE 1接入目标网络后, 向目标网络基站系统发送切换通知消息, 例 如: 发送 Handover Notify消息, 或者 UE 1执行跟踪区更新 (Tracking Area Update, 简称为 TAU) 请求消息, 或者路由区更新 (Routing Area Update, 简称为 RAU) 请求 消息; 步骤 S522: 目标网络基站系统向目标网络控制网元发送切换通知消息, 或者目标 网络基站系统向目标网络控制网元转发 UE 1发起的 TAU, 或者 RAU; 步骤 S524: 目标网络控制网元更新核心网的承载连接, 例如: 通过目标服务网关 (例如: SGW) 向目标数据网关(例如: PDN GW)发送 Modify Bearer Request消息, 以使目标网络基站系统通过目标网络服务网关与目标数据网关建立承载连接; 步骤 S526: 目标数据网关与策略控制功能进行交互, 允许用户在默认承载上收发 语音业务数据, 缩小语音业务数据中断时间满足切换的需求; 步骤 S528 : UE向切换控制功能发送 IMS业务连续性切换请求, 例如: 发送 SIP INVITE消息,其中,该消息中携带有反向单模切换会话标识( Session Transfer Identifier - reverse Single Radio, 简称为 STI-rSR); STI-rSR为指向切换控制功能的可路由标识, 在 UE之前在源侧 PS域执行 IMS注册过程中, 由切换控制功能发送给 UE; 步骤 S530- S532: 代理呼叫控制功能通过和策略控制功能交互, 为该切换请求建 立语音呼叫专有承载; 至此, 在 UE 1与 UE 2之间建立起 IMS媒体连接, 且 UE 1与 数据网络网关通过目标网络基站系统和目标网络服务网关建立起承载连接,使得 UE 1 与 UE 2能够继续通话, UE 1的 PS业务可以继续进行。 至此, 在 UE 1与 UE 2之间建立起 IMS媒体连接, 且 UE 1与数据网络网关通过 目标网络基站系统和目标网络服务网关建立起承载连接, 使得 UE 1与 UE 2能够继续 通话, UE 1的 PS业务可以继续进行。 图 6是根据本发明实施例的资源承载的预留系统的结构框图。 如图 6所示, 该资 源承载的预留系统可以包括: 目标网络基站系统 10; 目标网络基站系统 10可以包括: 第一接收模块 100, 设置为接收来自于目标网络分组控制实体的请求消息, 其中, 请 求消息中携带有用于指示目标网络基站系统采用目标网络分组控制实体从源网络分组 控制实体获取到的包交换 PS 承载信息进行资源承载预留的指示信息; 资源承载预留 模块 102, 设置为按照指示信息根据接收到的 PS承载信息进行资源承载预留。 采用如图 6所示的装置, 解决了相关技术中在源网络基站系统无法正确生成或者 缺失源至目标容器的情况下, 会导致单待业务连续性过程失败的问题, 进而达到了在 non DTM模式下保证反向单待业务连续性成功执行。 在优选实施过程中, 上述请求消息中携带的指示信息可以为目标网络分组控制实 体在请求消息中添加的显式标识信息。 优选地, 上述请求消息可以为切换请求消息, 其中, 该切换请求消息中携带的指 示信息可以为源至目标容器。 优选地, 如图 7所示, 上述系统还可以包括: 源网络基站系统 20; 源网络基站系 统 20可以包括: 修改模块 200, 设置为对源至目标容器进行修改。 在优选实施过程中, 上述对源至目标容器的修改可以包括但不限于以下之一: 修改一、 将源至目标容器中与 PS承载信息对应的参数名称对应的参数值置为空; 修改二、 将源至目标容器中与 PS承载信息对应的参数删除。 优选地,如图 7所示,上述资源承载预留模块 102可以包括:第一获取单元 1020, 设置为获取源至目标容器; 第一处理单元 1022, 设置为按照经过修改的源至目标容器 的指示根据 PS承载信息进行资源承载预留。 优选地, 上述请求消息可以为切换请求消息, 其中, 该切换请求消息中携带的指 示信息可以为切换请求消息中未携带有源至目标容器。 优选地, 如图 8所示, 源网络基站系统 20可以包括: 处理模块 202, 设置为不生 成源至目标容器。 优选地, 如图 8所示, 资源承载预留模块 102可以包括: 第二获取单元 1024, 设 置为在切换请求消息中未获取到源至目标容器; 第二处理单元 1026, 设置为按照未获 取到源至目标容器的指示根据 PS承载信息进行资源承载预留。 优选地, 上述请求消息可以为资源预留请求消息。 优选地, 如图 9所示, 资源承载预留模块 102可以包括: 第三获取单元 1028, 设 置为从资源预留请求消息中获取 PS承载信息; 第三处理单元 1030, 设置为根据获取 到的 PS承载信息进行资源承载预留。 优选地, 如图 9所示, 上述系统还可以包括: UE 30; UE 30可以包括: 接入模块
300, 设置为接入目标网络基站系统所在的目标网络; 第一发送模块 302, 设置为向目 标网络的网络实体发送接入响应消息, 其中, 目标网络的网络实体可以包括: 目标网 络基站系统和目标网络分组控制实体, 接入响应消息可以包括但不限于以下之一: 切 换确认消息、 跟踪区更新请求消息、 路由区更新请求消息。 优选地,如图 9所示,上述目标网络基站系统 10还可以包括:第二接收模块 104, 设置为接收来自于 UE的切换确认消息或者跟踪区更新请求消息或者路由区更新请求 消息; 第二发送模块 106, 设置为将接收到的切换确认消息或者跟踪区更新请求消息 或者路由区更新请求消息转发至目标网络分组控制实体。 在优选实施过程中, 上述资源预留请求消息中可以携带有采用 PS 承载信息进行 资源承载预留的指示信息。 优选地,第二接收模块 104,还设置为根据指示信息接收来自于 UE的切换确认消 息或者跟踪区更新请求消息或者路由区更新请求消息; 第二发送模块 106, 还设置为 将接收到的切换确认消息或者跟踪区更新请求消息或者路由区更新请求消息转发至目 标网络分组控制实体。 需要说明的是, 图 6至图 9中所示的各个模块以及各个单元之间相互作用的优选 工作方式可以参见图 2至图 5所示的实施例, 此处不再赘述。 从以上的描述中, 可以看出, 上述实施例实现了如下技术效果 (需要说明的是这 些效果是某些优选实施例可以达到的效果): 在 non DTM模式下保证反向单待业务连 续性成功执行。 显然, 本领域的技术人员应该明白, 上述的本发明的各模块或各步骤可以用通用 的计算装置来实现, 它们可以集中在单个的计算装置上, 或者分布在多个计算装置所 组成的网络上, 可选地, 它们可以用计算装置可执行的程序代码来实现, 从而, 可以 将它们存储在存储装置中由计算装置来执行, 并且在某些情况下, 可以以不同于此处 的顺序执行所示出或描述的步骤, 或者将它们分别制作成各个集成电路模块, 或者将 它们中的多个模块或步骤制作成单个集成电路模块来实现。 这样, 本发明不限制于任 何特定的硬件和软件结合。 以上所述仅为本发明的优选实施例而已, 并不用于限制本发明, 对于本领域的技 术人员来说, 本发明可以有各种更改和变化。 凡在本发明的精神和原则之内, 所作的 任何修改、 等同替换、 改进等, 均应包含在本发明的保护范围之内。

Claims

权 利 要 求 书 一种资源承载的预留方法, 包括:
目标网络基站系统接收来自于目标网络分组控制实体的请求消息, 其中, 所述请求消息中携带有用于指示所述目标网络基站系统采用所述目标网络分组 控制实体从源网络分组控制实体获取到的包交换 PS承载信息进行资源承载预 留的指示信息;
所述目标网络基站系统按照所述指示信息根据接收到的所述 PS承载信息 进行资源承载预留。 根据权利要求 1所述的方法, 其中, 所述请求消息中携带的所述指示信息为所 述目标网络分组控制实体在所述请求消息中添加的显式标识信息。 根据权利要求 1所述的方法, 其中, 所述请求消息为切换请求消息, 其中, 所 述切换请求消息中携带的指示信息为源至目标容器。 根据权利要求 3所述的方法, 其中, 在所述目标网络基站系统接收来自于所述 目标网络分组控制实体的所述切换请求消息之前, 还包括:
源网络基站系统对所述源至目标容器进行修改。 根据权利要求 3或 4所述的方法, 其中, 对所述源至目标容器的修改包括以下 之一:
将所述源至目标容器中与所述 PS承载信息对应的参数名称对应的参数值 置为空;
将所述源至目标容器中与所述 PS承载信息对应的参数删除。 根据权利要求 3至 5中任一项所述的方法, 其中, 所述目标网络基站系统按照 所述指示信息根据接收到的所述 PS承载信息进行资源承载预留包括:
所述目标网络基站系统获取所述源至目标容器;
所述目标网络基站系统按照经过修改的所述源至目标容器的指示根据所述 切换请求消息中携带的所述 PS承载信息进行资源承载预留。
7. 根据权利要求 1所述的方法, 其中, 所述请求消息为切换请求消息, 其中, 所 述切换请求消息中携带的指示信息为所述切换请求消息中未携带有源至目标容 器。
8. 根据权利要求 7所述的方法, 其中, 在所述目标网络基站系统接收来自于所述 目标网络分组控制实体的所述切换请求消息之前, 还包括:
源网络基站系统未生成所述源至目标容器。
9. 根据权利要求 7或 8所述的方法, 其中, 所述目标网络基站系统按照所述指示 信息根据接收到的所述 PS承载信息进行资源承载预留包括:
所述目标网络基站系统在所述切换请求消息中未获取到所述源至目标容 器;
所述目标网络基站系统按照未获取到所述源至目标容器的指示根据所述 PS承载信息进行资源承载预留。
10. 根据权利要求 1所述的方法, 其中, 所述请求消息为资源预留请求消息。
11. 根据权利要求 10所述的方法,其中,在所述目标网络基站系统接收来自于所述 目标网络分组控制实体的所述资源预留请求消息之前, 所述源网络基站系统对 源至目标容器的处理包括以下之一:
将所述源至目标容器中与所述 PS承载信息相关的参数名称对应的参数值 置为空;
将所述源至目标容器中与所述 PS承载信息相关的参数删除; 未生成所述源至目标容器。
12. 根据权利要求 10或 11所述的方法, 其中, 所述目标网络基站系统根据接收到 的所述 PS承载信息进行资源承载预留包括:
所述目标网络基站系统从所述资源预留请求消息中获取所述 PS承载信息; 所述目标网络基站系统根据获取到的所述 PS承载信息进行资源承载预留。
13. 根据权利要求 12所述的方法,其中,在所述目标网络基站系统根据所述接收到 的所述 PS承载信息进行资源承载预留之后, 还包括:
用户设备 UE接入所述目标网络基站系统所在的目标网络, 并向所述目标 网络的网络实体发送接入响应消息, 其中, 所述目标网络的网络实体包括: 所 述目标网络基站系统和所述目标网络分组控制实体, 所述接入响应消息包括以 下之一: 切换确认消息、 跟踪区更新请求消息、 路由区更新请求消息。
14. 根据权利要求 13所述的方法, 其中, 在所述 UE接入所述目标网络基站系统所 在的目标网络, 并向所述目标网络的网络实体发送所述接入响应消息之后, 还 包括:
所述目标网络基站系统接收来自于所述 UE的所述切换确认消息或者所述 跟踪区更新请求消息或者所述路由区更新请求消息;
所述目标网络基站系统将接收到的所述切换确认消息或者所述跟踪区更新 请求消息或者所述路由区更新请求消息转发至所述目标网络分组控制实体。
15. 根据权利要求 14所述的方法,其中,所述资源预留请求消息中携带有采用所述 PS承载信息进行资源承载预留的指示信息。
16. 根据权利要求 15所述的方法, 其中, 在所述 UE接入所述目标网络基站系统所 在的目标网络, 并向所述目标网络的网络实体发送所述接入响应消息之后, 还 包括:
所述目标网络基站系统根据所述指示信息接收来自于所述 UE的所述切换 确认消息或者所述跟踪区更新请求消息或者所述路由区更新请求消息;
所述目标网络基站系统将接收到的所述切换确认消息或者所述跟踪区更新 请求消息或者所述路由区更新请求消息转发至所述目标网络分组控制实体。
17. 一种资源承载的预留系统, 包括: 目标网络基站系统;
所述目标网络基站系统包括:
第一接收模块, 设置为接收来自于目标网络分组控制实体的请求消息, 其 中, 所述请求消息中携带有用于指示所述目标网络基站系统采用所述目标网络 分组控制实体从源网络分组控制实体获取到的包交换 PS承载信息进行资源承 载预留的指示信息;
资源承载预留模块, 设置为按照所述指示信息根据接收到的所述 PS承载 信息进行资源承载预留。
18. 根据权利要求 17所述的系统,其中,所述请求消息中携带的所述指示信息为所 述目标网络分组控制实体在所述请求消息中添加的显式标识信息。
19. 根据权利要求 17所述的系统, 其中, 所述请求消息为切换请求消息, 其中, 所 述切换请求消息中携带的指示信息为源至目标容器。
20. 根据权利要求 19所述的系统, 其中, 所述系统还包括: 源网络基站系统; 所述源网络基站系统包括:
修改模块, 设置为对所述源至目标容器进行修改。
21. 根据权利要求 19或 20所述的系统, 其中, 对所述源至目标容器的修改包括以 下之一:
将所述源至目标容器中与所述 PS承载信息对应的参数名称对应的参数值 置为空;
将所述源至目标容器中与所述 PS承载信息对应的参数删除。
22. 根据权利要求 19至 21中任一项所述的系统, 其中, 所述资源承载预留模块包 括- 第一获取单元, 设置为获取所述源至目标容器;
第一处理单元, 设置为按照经过修改的所述源至目标容器的指示根据所述 PS承载信息进行资源承载预留。
23. 根据权利要求 17所述的系统, 其中, 所述请求消息为切换请求消息, 其中, 所 述切换请求消息中携带的指示信息为所述切换请求消息中未携带有源至目标容 器。
24. 根据权利要求 23所述的系统, 其中, 所述源网络基站系统包括:
处理模块, 设置为不生成所述源至目标容器。
25. 根据权利要求 23或 24所述的系统, 其中, 所述资源承载预留模块包括:
第二获取单元,设置为在所述切换请求消息中未获取到所述源至目标容器; 第二处理单元,设置为按照未获取到所述源至目标容器的指示根据所述 PS 承载信息进行资源承载预留。
26. 根据权利要求 17所述的系统, 其中, 所述请求消息为资源预留请求消息。 根据权利要求 26所述的系统, 其中, 所述资源承载预留模块包括: 第三获取单元, 设置为从所述资源预留请求消息中获取所述 PS承载信息; 第三处理单元, 设置为根据获取到的所述 PS承载信息进行资源承载预留。
28. 根据权利要求 27所述的系统, 其中, 所述系统还包括: 用户设备 UE;
所述 UE包括: 接入模块, 设置为接入所述目标网络基站系统所在的目标网络; 第一发送模块, 设置为向所述目标网络的网络实体发送接入响应消息, 其 中, 所述目标网络的网络实体包括: 所述目标网络基站系统和所述目标网络分 组控制实体, 所述接入响应消息包括以下之一: 切换确认消息、 跟踪区更新请 求消息、 路由区更新请求消息。
29. 根据权利要求 28所述的系统, 其中, 所述目标网络基站系统还包括:
第二接收模块, 设置为接收来自于所述 UE的所述切换确认消息或者所述 跟踪区更新请求消息或者所述路由区更新请求消息;
第二发送模块, 设置为将接收到的所述切换确认消息或者所述跟踪区更新 请求消息或者所述路由区更新请求消息转发至所述目标网络分组控制实体。
30. 根据权利要求 29所述的系统,其中,所述资源预留请求消息中携带有采用所述 PS承载信息进行资源承载预留的指示信息。
31. 根据权利要求 30所述的系统, 其中,
所述第二接收模块, 还设置为根据所述指示信息接收来自于所述 UE的所 述切换确认消息或者所述跟踪区更新请求消息或者所述路由区更新请求消息; 所述第二发送模块, 还设置为将接收到的所述切换确认消息或者所述跟踪 区更新请求消息或者所述路由区更新请求消息转发至所述目标网络分组控制实 体。
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