CN104507129A - SRVCC process triggering method, mobile management entity and base station - Google Patents
SRVCC process triggering method, mobile management entity and base station Download PDFInfo
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- CN104507129A CN104507129A CN201410727794.1A CN201410727794A CN104507129A CN 104507129 A CN104507129 A CN 104507129A CN 201410727794 A CN201410727794 A CN 201410727794A CN 104507129 A CN104507129 A CN 104507129A
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Abstract
The embodiment of the invention provides an SRVCC process triggering method, a mobile management entity and a base station, relates to the field of communication and solves a problem in the existing CSFB process that voice resources cannot be managed in a unified way. The concrete scheme is that an MME receives a CSFB access request sent by a UE; the MME acquires an SRVCC session switching number STN-SR in user subscription information of the UE; after the MME receives the CSFB access request, a switching request message is sent to the base station; the switching request message comprises the ability parameter of the UE and the STN-SR of the UE; and after the MME receives the switching request message fed back by the base station, SRVCC business indication is sent to a mobile switching center MSC according to indication of the switching request message so that the MSC is enabled to execute the SRVCC process according to the SRVCC business indication. The SRVCC process triggering method is applied to the SRVCC process.
Description
Technical field
The present invention relates to the communications field, particularly relate to a kind of SRVCC trigger flow method, mobile management entity and base station.
Background technology
In Long Term Evolution (English: Long Term Evolution, to be called for short LTE) network, when subscriber equipment (English: User Equipment, to be called for short UE) carries out audio call, usually can realize audio call by two kinds of modes.Wherein, one is (English: Circuit Switched Fallback by circuit domain dropping, being called for short CSFB) technology realizes, (English: the 4Generation Mobile CommunicationTechnology from forth generation mobile communication technology by UE, being called for short 4G) to fall back to Generation Mobile Telecommunication System technology (English: SecondGeneration for network, be called for short 2G)/G mobile communication (English: 3rd Generation, be called for short 3G) in network, utilize the speech business of 2G/3G real-time performance, another kind utilizes Internet protocol (English: Internet Protocol, be called for short IP) IP multimedia subsystem, IMS (English: IP Multimedia Subsystem, being called for short IMS) directly to carry out voice LTE in the lte networks (English: Voice over LTE for system, be called for short VoLTE) business, it is a kind of IP data transmission technology, it is without the need to 2G/3G network, whole business is all carried in LTE network, data and the unification of speech business under consolidated network can be realized, namely the data service of two-forty is not only provided under LTE network, go back carry voice traffic simultaneously, and do not need to rely on 2G/3G network.But UE specifically carries out CSFB business when realizing audio call or VoLTE business is decided by the configuration of network and UE self, and therefore, in actual applications, these two kinds of modes are simultaneous.
Simultaneously, when UE carries out above-mentioned VoLTE business in the lte networks, walk out LTE network when entering 2G/3G network, usual employing injection frequently continuous voice call (English: Single Radio Voice Call Continuity, to be called for short SRVCC) technology realizes the continuity of audio call.In this approach, UE carries out that resource needed for speech business undertaken distributing by IMS systematic unity.And in CSFB process, the UE resource of carrying out needed for speech business is then carried out as required distributing according to the demand of each UE by mobile switching centre (Mobile Switching Center).
In addition, along with the development of data communication and multimedia service demand, and the ultra-high data transmissions speed that 4G network has, in future, a large number of users will be had and use 4G network to carry out business transmission.In such a scenario, if when having the UE of a large amount of use CSFB business to MSC request dispatching resource, because MSC is when for using the UE Resources allocation of CSFB business, normally distribute separately according to the demand of UE, IMS speech business can't be thought of as and retain enough resources, namely can't the voice resource that each UE distributes be managed as a whole, thus cause MSC after for a large amount of UE Resources allocation, likely cause CS resource less, and cannot fall back to from LTE network the UE that 2G/3G network carries out IMS speech business by SRVCC process enough resources are provided for follow-up, thus cause IMS speech business instability even to be interrupted.
Summary of the invention
The embodiment of the present invention provides a kind of SRVCC trigger flow method, mobile management entity and base station, solves the problem cannot carrying out unified management in existing CSFB process to voice resource.
For achieving the above object, the embodiment of the present invention adopts following technical scheme:
First aspect, provides a kind of SRVCC trigger flow method, comprising:
Mobile management entity MME receives the circuit domain dropping CSFB access request that user equipment (UE) sends; Described CSFB access request comprises the ability parameter of described UE; The ability parameter of described UE is for representing that described UE possesses injection continuous voice call SRVCC ability frequently;
Described MME obtains the session Handover Number STN-SR of the SRVCC in the user signing contract information of described UE; Described STN-SR represents that described MME supports SRVCC and described SRVCC opens to described UE by described MME;
Described MME, after receiving described CSFB access request, sends handover request message to base station; Described handoff request message draws together the ability parameter of described UE and the STN-SR of described UE;
Described MME is after the switching response message receiving described base station feedback, and the instruction according to described switching response message sends the instruction of SRVCC business to moving exchanging center MSC, so that described MSC performs SRVCC flow process according to described SRVCC business instruction;
Wherein, described SRVCC flow process comprises: described MSC sends resource allocation request according to the instruction of described SRVCC business to IP Multimedia System IMS, makes described IMS indicate described MSC to set up resource needed for CS carrying for described UE distributes according to described resource allocation request.
In the first possible implementation of first aspect, described MME sends handover request message and specifically comprises to base station:
Described MME sends the handover request message comprising circuit domain dropping CSFB sign to described base station; Wherein said CSFB sign is for representing that described UE needs to perform CSFB flow process.
In conjunction with the first possible implementation of first aspect or first aspect, in the implementation that the second of first aspect is possible, before described MME obtains the session Handover Number STN-SR of the SRVCC in the user signing contract information of described UE, described method also comprises:
If do not comprise the user signing contract information of described UE in described MME, then described MME sends user data requests message to ownership place register HSS; Described user data requests message is used for the user signing contract information comprising the described UE of the STN-SR of described UE to described HSS request;
Described MME receives the user data requests response message that described HSS feeds back; Described user data requests response message comprises the user signing contract information of described UE.
In conjunction with the first possible implementation of first aspect or first aspect, in the third possible implementation of first aspect, described handover request message is S1-AP UE ContextModification Request S1-AP UE context modification request message.
Second aspect, provides a kind of SRVCC trigger flow method, comprising:
Base station receives the handover request message that mobile management entity MME sends according to circuit domain dropping CSFB access request; Described handoff request message draws together the session Handover Number STN-SR of the ability parameter of UE and the SRVCC of described UE; The ability parameter of described UE is for representing that described UE possesses injection continuous voice call SRVCC ability frequently; Described STN-SR represents that described MME supports SRVCC and described SRVCC opens to described UE by described MME;
When the described SRVCC flow process of the suitable triggering of described UE current network conditions is determined according to the measurement report that described UE reports in described base station, the ability parameter of described base station according to the described UE comprised in described handover request message and the STN-SR of described UE, when there is no VoLTE voice bearer, trigger described SRVCC flow process, and send switching response message to described MME, so that described MME is after the switching response message receiving described base station feedback, instruction according to described switching response message sends the instruction of SRVCC business to moving exchanging center MSC, so that described MSC performs SRVCC flow process according to described SRVCC business instruction,
Wherein, described SRVCC flow process comprises: described MSC sends resource allocation request according to the instruction of described SRVCC business to IP Multimedia System IMS, makes described IMS indicate described MSC to set up resource needed for CS carrying for described UE distributes according to described resource allocation request.
The third aspect, provides a kind of mobile management entity MME, comprising:
Receiving element, for receiving the circuit domain dropping CSFB access request that user equipment (UE) sends; Described CSFB access request comprises the ability parameter of described UE; The ability parameter of described UE is for representing that described UE possesses injection continuous voice call SRVCC ability frequently;
Acquiring unit, for obtaining the session Handover Number STN-SR of the SRVCC in the user signing contract information of described UE; Described STN-SR represents that described MME supports SRVCC and described SRVCC opens to described UE by described MME;
Transmitting element, for after receiving described CSFB access request, sends handover request message to base station; Described handoff request message draws together the STN-SR of the ability parameter of the described UE that described receiving element receives and the described UE of described acquiring unit acquisition;
Described transmitting element, also for after the switching response message receiving described base station feedback, instruction according to described switching response message sends the instruction of SRVCC business to moving exchanging center MSC, so that described MSC performs SRVCC flow process according to described SRVCC business instruction;
Wherein, described SRVCC flow process comprises: described MSC sends resource allocation request according to the instruction of described SRVCC business to IP Multimedia System IMS, makes described IMS indicate described MSC to set up resource needed for CS carrying for described UE distributes according to described resource allocation request.
In the first possible implementation of the third aspect, described transmitting element when sending handover request message to base station, specifically for: send the handover request message comprising circuit domain dropping CSFB sign to described base station; Wherein said CSFB sign is for representing that described UE needs to perform CSFB flow process.
In conjunction with the first possible implementation of the 3rd or the third aspect, in the implementation that the second of the third aspect is possible, described transmitting element, if also for not comprising the user signing contract information of described UE in described MME, then described MME sends user data requests message to ownership place register HSS; Described user data requests message is used for the user signing contract information comprising the described UE of the STN-SR of described UE to described HSS request;
Described receiving element, also for receiving the user data requests response message that described HSS feeds back; Described user data requests response message comprises the user signing contract information of described UE.
In conjunction with the first possible implementation of the third aspect or the third aspect, in the third possible implementation of the third aspect, described handover request message is S1-AP UE ContextModification Request S1-AP UE context modification request message.
Fourth aspect, provides a kind of base station, comprising:
Receiving element, for receiving the handover request message that mobile management entity MME sends according to circuit domain dropping CSFB access request; Described handoff request message draws together the session Handover Number STN-SR of the ability parameter of UE and the SRVCC of described UE; The ability parameter of described UE is for representing that described UE possesses injection continuous voice call SRVCC ability frequently; Described STN-SR represents that described MME supports SRVCC and described SRVCC opens to described UE by described MME;
Trigger element, for when the described SRVCC flow process of the suitable triggering of described UE current network conditions is determined according to the measurement report that described UE reports in described base station, according to the ability parameter of described UE comprised in the described handover request message that described receiving element receives and the STN-SR of described UE, when there is no VoLTE voice bearer, trigger described SRVCC flow process, and send switching response message to described MME, so that described MME is after the switching response message receiving described base station feedback, instruction according to described switching response message sends the instruction of SRVCC business to moving exchanging center MSC, so that described MSC performs SRVCC flow process according to described SRVCC business instruction,
Wherein, described SRVCC flow process comprises: described MSC sends resource allocation request according to the instruction of described SRVCC business to IP Multimedia System IMS, makes described IMS indicate described MSC to set up resource needed for CS carrying for described UE distributes according to described resource allocation request.
The SRVCC trigger flow method that the embodiment of the present invention provides, mobile management entity and base station, MME receives the CSFB access request that UE sends, and the STN-SR obtained in the user signing contract information of UE, then MME is after receiving CSFB access request, the handover request message comprising the STN-SR of UE is sent to base station, base station is when determining that UE current network conditions is suitable for triggering SRVCC flow process, can according to the instruction of handover request message, when there is no VoLTE voice bearer, trigger SRVCC flow process, and send switching response message to MME, so that MME sends the instruction of SRVCC business according to the instruction of this switching response message to moving exchanging center MSC, MSC performs SRVCC flow process according to the instruction of SRVCC business, thus by performing SRVCC flow process in CSFB process, the speech business of CSFB is also placed in IMS subnet and manages, make IMS system can unify to unify configuration and management to CSFB voice resource and IMS voice resource.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The schematic flow sheet of a kind of SRVCC trigger flow method that Fig. 1 provides for the embodiment of the present invention;
The schematic flow sheet of the another kind of SRVCC trigger flow method that Fig. 2 provides for the embodiment of the present invention;
The schematic flow sheet of another SRVCC trigger flow method that Fig. 3 provides for the embodiment of the present invention;
The structural representation of a kind of mobile management entity that Fig. 4 provides for the embodiment of the present invention;
The structural representation of a kind of base station that Fig. 5 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
It is (English: Circuit Switched Fallback that embodiments of the invention relate to circuit domain dropping, be called for short CSFB) technology and injection continuous voice call (English: Single Radio Voice CallContinuity, to be called for short SRVCC) technology frequently.Concrete, CSFB technology is that UE is when needing in the lte networks to carry out speech business, by CSFB technology, UE is fallen back to Generation Mobile Telecommunication System technology (English: Second Generation, be called for short 2G)/G mobile communication (English: 3rd Generation, be called for short 3G) in network, realize speech business by 2/3G network.And SRVCC technology can ensure that UE carries out the networking telephone (English: Voiceover Internet Protocol in the lte networks, be called for short VoIP), and from still keeping the continuation of audio call after LTE network enters 2/3G network, namely after using the UE of VoLTE speech business to enter 2G/3G network from LTE network, UE is by performing SRVCC, realize taking over seamlessly between VoIP voice and CS territory voice, thus ensure that speech business can not be interrupted.
In the prior art, CSFB flow process specifically comprises: when UE needs to carry out audio call in the lte networks, this UE can to network side initiate CSFB access request (as, ESR message), mobile management entity is (English: Mobility Management Entity, be called for short MME) after receiving this CSFB access request, S1-AP UE context modification request can be sent (English: S1-AP UE Context Modification Request) to base station, carrying out signals base UE because of CSFB speech business needs to fall back to 2/3G network, follow-up falling process is performed by base station, SRVCC flow process specifically comprises: walk out after 4G network enters 2/3G network area at UE, IP Multimedia System is (English: IP Multimedia Subsystem, be called for short IMS) anchor point to need to move to mobile switching centre from original MME (English: Mobile Switching Center, be called for short MSC) on, then continue to realize speech business by MSC, therefore, above-mentioned SRVCC flow process can be divided into (Inter-RAT Handover) network handover routines and these two flow processs of (Session Transfer) Session Hand-off flow process.
Embodiment one
The embodiment of the present invention provides a kind of SRVCC trigger flow method, and as shown in Figure 1, can be realized by MME, wherein, the method for this SRVCC trigger flow specifically comprises the steps:
101, MME receives the CSFB access request that UE sends.
Wherein, above-mentioned circuit domain dropping is (English: Circuit Switched Fallback, being called for short CSFB) to comprise the ability of UE (English: capability) parameter, the ability parameter of this UE is for representing that UE possesses SRVCC ability for access request.This CSFB access request is for triggering CSFB flow process.Concrete, above-mentioned CSFB access request can be expansion service request (English: Extended Service Request, to be called for short ESR) message.
102, MME obtains the STN-SR in the user signing contract information of UE.
Wherein, the session Handover Number of above-mentioned SRVCC is (English: STN-SR) to represent that MME supports SRVCC and SRVCC opens to UE by this MME.Concrete, MME, after receiving the ESR message that UE sends, just triggers CSFB flow process, if desired under CSFB process, triggers SRVCC flow process, then this MME needs the STN-SR that obtains in the user signing contract information of this UE.If stored the user signing contract information of this UE in this MME, then this MME has directly obtained the STN-SR of this UE from the user signing contract information of this UE.If do not store the user signing contract information of this UE in this MME, then this MME needs to obtain from this ownership place register (English: Home Subscriber Server, to be called for short HSS) side the user signing contract information including this UE of the STN-SR of this UE.
Optionally, if do not store the user signing contract information of this UE in this MME, step 102 specifically can as follows:
If do not comprise the user signing contract information of UE in 102a MME, then MME sends user data requests message to HSS.
Wherein, above-mentioned user data requests message is used for the user signing contract information comprising this UE of the STN-SR of this UE to this HSS request.
102b, MME receive the user data requests response message of HSS feedback.
Wherein, above-mentioned user data requests response message comprises the user signing contract information of this UE.
Exemplary, after MME receives the ESR request of UE transmission, know after this UE has SRVCC function according to the ability parameter of this UE in this ESR message, just need the STN-SR obtaining this UE to represent that it is supported SRVCC and is opened to this UE by SRVCC, if during the user signing contract information of this MME not this UE, then this MME can be ((English: IP Multimedia Subsystem for the treatment of calling IP Multimedia System to HSS, be called for short IMS) customer data base of network entity, and perform authentication and the mandate of user, and the information of associated subscriber physical location can be provided) send a user data requests information, so that this HSS downloads the user signing contract information of this UE from the customer data base of this IMS network entity according to the instruction of this user request information, and by user data requests response message, the user signing contract information of this UE is fed back to this MME.
103, MME is after receiving CSFB access request, sends handover request message to base station.
Wherein, above-mentioned handoff request message draws together the ability parameter of this UE and the STN-SR of this UE.Above-mentioned handover request message can be that S1-AP UE context modification request is (English: S1-AP UE Context Modification Request) message.In the prior art, this S1-AP UE context modification request message is used to indicate base station triggers CSFB flow process when UE is in Idle state.
104, MME is after receiving the switching response message of base station feedback, and the instruction according to this switching response message sends the instruction of SRVCC business to MSC, so that MSC performs SRVCC flow process according to the instruction of SRVCC business.
Wherein, the instruction of SRVCC business refers to that MME is (English: MobileSwitching Center to mobile switching centre, be called for short MSC) command information performing SCVCC flow process in order to control MSC that sends, the instruction of this SRVCC business can be that CS resource distribution message is (English: CS Resource Relocation), to be used to indicate this MSC in CSFB process, to perform corresponding SRVCC flow process.Wherein, above-mentioned SRVCC flow process comprises: MSC according to SRVCC business instruction to IMS send resource allocation request, make IMS according to resource allocation request come instruct MS C for UE distribute set up CS carrying needed for resource.
Exemplary, MSC is after the CS resource distribution message receiving MME transmission, Session Transfer process is sent to IMS network, carry the mark of this UE, IMS replies to MSC and sets up CS carrying to this UE and need to distribute the message of how many resources simultaneously, and then MSC consults resource with RNC again and prepares, and distribute corresponding resource for this UE, after distributing, MSC replys MME response message, and MME triggers UE again from 4G network to the switching of 2/3G network.
Optionally, if trigger SRVCC flow process in CSFB process after, this UE follow-up also needs continues to perform CSFB flow process, namely this CSFB requirements of process utilizes SRVCC technology to be fallen after rise to 2/3G network from 4G network by UE, when having continued the subsequent process of CSFB flow process, then step 103 specifically comprises following content:
103a, MME send the handover request message comprising CSFB sign to base station.
Wherein, above-mentioned CSFB sign is (English: CSFB Indicator) for representing that UE needs to perform CSFB flow process.Exemplary, if trigger SRVCC flow process in CSFB process after, this UE follow-up also needs continues to perform CSFB flow process, then need to increase a CSFB Indicator in the handover request message sent to base station at MME, so that this CSFB Indicator is sent to MSC by the instruction of SRVCC business by this MME, make this MSC both can perform SRVCC flow process, can also realized after from 4G network to the falling of 2/3G network by SRVCC, continue to perform CSFB flow process.
The SRVCC trigger flow method that the embodiment of the present invention provides, MME receives the CSFB access request that UE sends, and the STN-SR obtained in the user signing contract information of UE, then MME is after receiving CSFB access request, the handover request message comprising the STN-SR of UE is sent to base station, receive the switching response message of base station feedback, and send the instruction of SRVCC business according to the instruction of this switching response message to moving exchanging center MSC, MSC performs SRVCC flow process according to the instruction of SRVCC business, thus by performing SRVCC flow process in CSFB process, the speech business of CSFB is also placed in IMS subnet and manages, make IMS system can unify to unify configuration and management to CSFB voice resource and IMS voice resource.
Embodiment two
The embodiment of the present invention provides a kind of SRVCC trigger flow method, as shown in Figure 2, can be realized by base station, and this SRVCC trigger flow method specifically comprises the steps:
201, base station receives the handover request message that MME sends according to CSFB access request.
Wherein, above-mentioned handoff request message draws together the ability parameter of UE and the STN-SR. of UE.Concrete, the ability parameter of above-mentioned UE is for representing that this UE possesses SRVCC ability; And above-mentioned STN-SR represents that MME supports SRVCC and SRVCC opens to UE by this MME.
202, when according to the measurement report that UE reports, base station determines that UE current network conditions is suitable for triggering SRVCC flow process, the ability parameter of base station according to the UE comprised in handover request message and the STN-SR of UE, when there is no VoLTE voice bearer, trigger SRVCC flow process, and send switching response message to MME, so that this MME is after receiving the switching response message of base station feedback, the instruction according to switching response message sends the instruction of SRVCC business to MSC.
Wherein, above-mentioned SRVCC business instruction is used to indicate this MSC and performs SRVCC flow process in CSFB process.Above-mentioned SRVCC flow process comprises: MSC according to SRVCC business instruction to IMS network send resource allocation request, make IMS network according to resource allocation request come instruct MS C for UE distribute set up CS carrying needed for resource.
Exemplary, base station can receive the measurement report that UE sends, judge whether the current residing network environment of this UE is suitable for triggering SRVCC flow process according to the signal strength information of the current residing network of this UE in measurement report, if signal strength signal intensity is enough strong, then judge that the current residing network environment of this UE is suitable for triggering SRVCC flow process.Then, whether base station exists STN-SR according in the ability parameter of the UE got from MME and the user signing contract information of this UE, determines whether to trigger SRVCC flow process, if do not meet above-mentioned arbitrary condition, then can not trigger SRVCC flow process.
The SRVCC trigger flow method that the embodiment of the present invention provides, base station receiving package is containing the handover request message of the STN-SR of UE, when determining that UE current network conditions is suitable for triggering SRVCC flow process, can according to the instruction of handover request message, when there is no VoLTE voice bearer, trigger SRVCC flow process, and send switching response message to MME, so that MME sends the instruction of SRVCC business according to the instruction of this switching response message to moving exchanging center MSC, MSC performs SRVCC flow process according to the instruction of SRVCC business, thus by performing SRVCC flow process in CSFB process, the speech business of CSFB is also placed in IMS network and manages, make IMS system can unify to unify configuration and management to CSFB voice resource and IMS voice resource.
Embodiment three
Below exemplary is introduced in concrete scene the SRVCC trigger flow method that the embodiment of the present invention provides.The explanation of technical term relevant to above-described embodiment in following examples, concept etc. can with reference to the above embodiments.The present embodiment mainly for after trigger SRVCC flow process in CSFB process, the follow-up process also needing to continue to perform CSFB flow process of UE.
As shown in Figure 3, concrete SRVCC trigger flow method is as follows.
301, MME receives the Extended Service Request message that UE sends.
Wherein, above-mentioned ESR message, for triggering CSFB flow process, comprises the capability parameter of UE in this ESR message.The ability parameter of above-mentioned UE is for representing that this UE possesses SRVCC ability.
If do not comprise the user signing contract information of UE in 302 MME, this MME sends an Insert Subscriber Data Request message to HSS.
Wherein, above-mentioned insertion user data requests is (English: Insert Subscriber DataRequest) message is used for the user signing contract information of asking this UE to HSS.
303, HSS searches the CAMEL-Subscription-Information of this UE according to the instruction of Insert Subscriber Data Request message, and by Insert Subscriber Data Response message, the CAMEL-Subscription-Information of this UE is fed back to this MME.
Wherein, the response of above-mentioned insertion user data is (English: STN-SR Insert Subscriber DataResponse) comprising this UE in message.
304, the S1-AP UE ContextModification Request message including CSFB sign is sent to base station by MME.
Wherein, above-mentioned CSFB sign is for representing that this UE is a UE needing to perform CSFB; The ability parameter of this UE and the STN-SR of this UE is also comprised in above-mentioned S1-AP UE Context Modification Request message.
305, base station is after receiving this S1-AP UE Context Modification Request message, determines whether UE current network conditions is suitable for triggering SRVCC flow process according to the measurement report that UE reports.
Concrete, base station sends request to UE, requires the measurement report of UE reporting subdistrict, so that according to the intensity of signal in measurement report, base station determines whether current environment is suitable for triggering SRVCC flow process.
306, when according to the measurement report that UE reports, base station determines that UE current network conditions is suitable for triggering SRVCC flow process, base station is according to the ability parameter of UE comprised in this S1-AP UE Context ModificationRequest message and the STN-SR of UE, when there is no VoLTE voice bearer, trigger SRVCC flow process, and send S1-APUE Context Modification Response message to MME.
307, MME is after receiving this S1-AP UE ContextModification Response message of base station feedback, and the instruction according to this S1-AP UE Context ModificationResponse message sends the instruction of SRVCC business to MSC.
Concrete, the S1-AP UE contextual modifications response that MME is receiving base station feedback is (English: S1-AP UE Context Modification Response) after message, due to the triggering of SRVCC flow process be the Extended Service Request message sent by UE, therefore, this MME can identify (English: Quality ofService Class Identifier not having service quality rating, be called for short QCI)=(i.e. LTE speech business is (English: Voice over LTE in 1 carrying, be called for short VoLTE) carrying) and message when, trigger SRVCC flow process, and send the instruction of SRVCC business to MSC.But because the present embodiment continues to perform CSFB flow process mainly for trigger SRVCC flow process in CSFB process after, therefore, above-mentioned SRVCC business is designated as the CS ResourceRelocation message that one contains CSFB Indicator.Concrete, when MME sends the instruction of SRVCC business to MSC, this MME can send CSFB Indicator to MSC separately through SGs interface (carrying out the interface of information interaction in CSFB technology between MME and MSC), send this CS ResourceRelocation message by Sv interface (carrying out the interface of information interaction in SRVCC technology between MME and MSC), this MME also directly can send by Sv interface the CS Resource Relocation message comprising CSFBIndicator.
308, the instruction that MSC indicates according to SRVCC business performs SRVCC flow process.
Exemplary, MSC is after the SRVCC business instruction receiving MME transmission, Session Transfer process is sent to IMS network, carry the mark of this UE, IMS replies to MSC and sets up CS carrying to this UE and need to distribute the message of how many Resources allocation simultaneously, and then MSC consults resource with RNC again and prepares, and distribute corresponding resource for this UE, after distributing, MSC replys MME response message, and MME triggers UE again from 4G network to the switching of 2/3G network.
The SRVCC trigger flow method that the embodiment of the present invention provides, MME receives the ESR message that UE sends, and the STN-SR obtained in the user signing contract information of UE, then MME is after receiving ESR message, the handover request message comprising the STN-SR of UE is sent to base station, base station is when determining that UE current network conditions is suitable for triggering SRVCC flow process, can according to the instruction of handover request message, when there is no VoLTE voice bearer, trigger SRVCC flow process, and send switching response message to MME, so that MME sends the instruction of SRVCC business according to the instruction of this switching response message to moving exchanging center MSC, MSC performs SRVCC flow process according to the instruction of SRVCC business, thus by performing SRVCC flow process in CSFB process, the speech business of CSFB is also placed in IMS network and manages, make IMS system can unify to unify configuration and management to CSFB voice resource and IMS voice resource.
Embodiment four
The embodiment of the present invention provides a kind of MME4, and as shown in Figure 4, this MME4 comprises: receiving element 41, acquiring unit 42 and transmitting element 43, wherein:
Receiving element 41, for receiving the CSFB access request that UE sends, this CSFB access request comprises the ability parameter of UE, and the ability parameter of this UE is for representing that this UE possesses SRVCC ability.
Acquiring unit 42, for obtaining the STN-SR in the user signing contract information of UE; This STN-SR represents that MME supports SRVCC and SRVCC opens to UE by this MME.
Transmitting element 43, for after receiving this CSFB access request, sends handover request message to base station; This handoff request message draws together the STN-SR of the ability parameter of the UE that above-mentioned receiving element 41 receives and the UE of above-mentioned acquiring unit 42 acquisition.
Above-mentioned transmitting element 43, also for after receiving the switching response message of base station feedback, the instruction according to this switching response message sends the instruction of SRVCC business to MSC, so that MSC performs SRVCC flow process according to the instruction of SRVCC business.
Wherein, above-mentioned SRVCC flow process comprises: MSC according to SRVCC business instruction to IMS network send resource allocation request, make described IMS network according to resource allocation request indicate described MSC for UE distribute set up CS carrying needed for resource.
Optionally, above-mentioned transmitting element 43 when sending handover request message to base station, specifically for: send to base station and comprise the handover request message of circuit domain dropping CSFB sign; Wherein this CSFB sign is for representing that UE needs to perform CSFB flow process.
Optionally, above-mentioned transmitting element 43 also for: if do not comprise the user signing contract information of UE in above-mentioned MME, then send user data requests message to HSS; This user data requests message is used for the user signing contract information comprising the UE of the STN-SR of UE to this HSS request.
Above-mentioned receiving element 41, also for receiving the user data requests response message of HSS feedback; This user data requests response message comprises the user signing contract information of UE.
Optionally, handover request message is S1-AP UE Context ModificationRequest.
The mobile management entity that the embodiment of the present invention provides, MME receives the CSFB access request that UE sends, and the STN-SR obtained in the user signing contract information of UE, then MME is after receiving CSFB access request, the handover request message comprising the STN-SR of UE is sent to base station, receive the switching response message of base station feedback, and send the instruction of SRVCC business according to the instruction of this switching response message to moving exchanging center MSC, MSC performs SRVCC flow process according to the instruction of SRVCC business, thus by performing SRVCC flow process in CSFB process, the speech business of CSFB is also placed in IMS network and manages, make IMS system can unify to unify configuration and management to CSFB voice resource and IMS voice resource.
Embodiment five
The embodiment of the present invention provides a kind of base station 5, and as shown in Figure 5, this base station 5 comprises: receiving element 51 and trigger element 52, wherein:
Receiving element 51, for receiving the handover request message that MME sends according to CSFB access request; This handoff request message draws together the ability parameter of UE and the STN-SR of UE; The ability parameter of UE is for representing that this UE possesses SRVCC ability; This STN-SR represents that MME supports SRVCC and SRVCC opens to UE by this MME.
Trigger element 52, for when according to the measurement report that UE reports, base station determines that this UE current network conditions is suitable for triggering SRVCC flow process, according to the ability parameter of UE comprised in the handover request message that receiving element 51 receives and the STN-SR of UE, when there is no VoLTE voice bearer, trigger SRVCC flow process, and send switching response message to MME, so that MME is after receiving the switching response message of base station feedback, instruction according to this switching response message sends the instruction of SRVCC business to MSC, so that MSC performs SRVCC flow process according to the instruction of SRVCC business.
Wherein, above-mentioned SRVCC flow process comprises: MSC according to SRVCC business instruction to IMS network send resource allocation request, make described IMS network according to resource allocation request indicate described MSC for UE distribute set up CS carrying needed for resource.
The base station that the embodiment of the present invention provides, base station receiving package is containing the handover request message of the STN-SR of UE, and when determining that UE current network conditions is suitable for triggering SRVCC flow process, can according to the instruction of handover request message, when there is no VoLTE voice bearer, trigger SRVCC flow process, and send switching response message to MME, so that MME sends the instruction of SRVCC business according to the instruction of this switching response message to moving exchanging center MSC, MSC performs SRVCC flow process according to the instruction of SRVCC business, thus by performing SRVCC flow process in CSFB process, the speech business of CSFB is also placed in IMS network and manages, make IMS system can unify to unify configuration and management to CSFB voice resource and IMS voice resource.
Those skilled in the art can be well understood to, for convenience and simplicity of description, only be illustrated with the division of above-mentioned each functional module, in practical application, can distribute as required and by above-mentioned functions and be completed by different functional modules, internal structure by device is divided into different functional modules, to complete all or part of function described above.The system of foregoing description and the specific works process of unit, with reference to the corresponding process in preceding method embodiment, can not repeat them here.
In several embodiments that the application provides, should be understood that disclosed system and method can realize by another way.Such as, system embodiment described above is only schematic, such as, the division of described module or unit, be only a kind of logic function to divide, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of unit or communication connection can be electrical, machinery or other form.
In addition, each functional unit in each embodiment of the application can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form of SFU software functional unit also can be adopted to realize.
The above, above embodiment only in order to the technical scheme of the application to be described, is not intended to limit; Although with reference to previous embodiment to present application has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment technical scheme of the application.
Claims (10)
1. a SRVCC trigger flow method, is characterized in that, comprising:
Mobile management entity MME receives the circuit domain dropping CSFB access request that user equipment (UE) sends; Described CSFB access request comprises the ability parameter of described UE; The ability parameter of described UE is for representing that described UE possesses injection continuous voice call SRVCC ability frequently;
Described MME obtains the session Handover Number STN-SR of the SRVCC in the user signing contract information of described UE; Described STN-SR represents that described MME supports SRVCC and described SRVCC opens to described UE by described MME;
Described MME, after receiving described CSFB access request, sends handover request message to base station; Described handoff request message draws together the ability parameter of described UE and the STN-SR of described UE;
Described MME is after the switching response message receiving described base station feedback, and the instruction according to described switching response message sends the instruction of SRVCC business to moving exchanging center MSC, so that described MSC performs SRVCC flow process according to described SRVCC business instruction;
Wherein, described SRVCC flow process comprises: described MSC sends resource allocation request according to the instruction of described SRVCC business to IP Multimedia System IMS, makes described IMS indicate described MSC to set up resource needed for CS carrying for described UE distributes according to described resource allocation request.
2. method according to claim 1, is characterized in that, described MME sends handover request message and specifically comprises to base station:
Described MME sends the handover request message comprising circuit domain dropping CSFB sign to described base station; Wherein said CSFB sign is for representing that described UE needs to perform CSFB flow process.
3. method according to claim 1 and 2, is characterized in that, before described MME obtains the session Handover Number STN-SR of the SRVCC in the user signing contract information of described UE, described method also comprises:
If do not comprise the user signing contract information of described UE in described MME, then described MME sends user data requests message to ownership place register HSS; Described user data requests message is used for the user signing contract information comprising the described UE of the STN-SR of described UE to described HSS request;
Described MME receives the user data requests response message that described HSS feeds back; Described user data requests response message comprises the user signing contract information of described UE.
4. method according to claim 1 and 2, is characterized in that, described handover request message is S1-AP UE Context Modification Request S1-AP UE context modification request message.
5. a SRVCC trigger flow method, is characterized in that, comprising:
Base station receives the handover request message that mobile management entity MME sends according to circuit domain dropping CSFB access request; Described handoff request message draws together the session Handover Number STN-SR of the ability parameter of UE and the SRVCC of described UE; The ability parameter of described UE is for representing that described UE possesses injection continuous voice call SRVCC ability frequently; Described STN-SR represents that described MME supports SRVCC and described SRVCC opens to described UE by described MME;
When the described SRVCC flow process of the suitable triggering of described UE current network conditions is determined according to the measurement report that described UE reports in described base station, the ability parameter of described base station according to the described UE comprised in described handover request message and the STN-SR of described UE, when there is no VoLTE voice bearer, trigger described SRVCC flow process, and send switching response message to described MME, so that described MME is after the switching response message receiving described base station feedback, instruction according to described switching response message sends the instruction of SRVCC business to moving exchanging center MSC, so that described MSC performs SRVCC flow process according to described SRVCC business instruction,
Wherein, described SRVCC flow process comprises: described MSC sends resource allocation request according to the instruction of described SRVCC business to IP Multimedia System IMS, makes described IMS indicate described MSC to set up resource needed for CS carrying for described UE distributes according to described resource allocation request.
6. a mobile management entity MME, is characterized in that, comprising:
Receiving element, for receiving the circuit domain dropping CSFB access request that user equipment (UE) sends; Described CSFB access request comprises the ability parameter of described UE; The ability parameter of described UE is for representing that described UE possesses injection continuous voice call SRVCC ability frequently;
Acquiring unit, for obtaining the session Handover Number STN-SR of the SRVCC in the user signing contract information of described UE; Described STN-SR represents that described MME supports SRVCC and described SRVCC opens to described UE by described MME;
Transmitting element, for after receiving described CSFB access request, sends handover request message to base station; Described handoff request message draws together the STN-SR of the ability parameter of the described UE that described receiving element receives and the described UE of described acquiring unit acquisition;
Described transmitting element, also for after the switching response message receiving described base station feedback, instruction according to described switching response message sends the instruction of SRVCC business to moving exchanging center MSC, so that described MSC performs SRVCC flow process according to described SRVCC business instruction;
Wherein, described SRVCC flow process comprises: described MSC sends resource allocation request according to the instruction of described SRVCC business to IP Multimedia System IMS, makes described IMS indicate described MSC to set up resource needed for CS carrying for described UE distributes according to described resource allocation request.
7. MME according to claim 6, is characterized in that, described transmitting element when sending handover request message to base station, specifically for: send the handover request message comprising circuit domain dropping CSFB sign to described base station; Wherein said CSFB sign is for representing that described UE needs to perform CSFB flow process.
8. the MME according to claim 6 or 7, is characterized in that:
Described transmitting element, if also for not comprising the user signing contract information of described UE in described MME, then described MME sends user data requests message to ownership place register HSS; Described user data requests message is used for the user signing contract information comprising the described UE of the STN-SR of described UE to described HSS request;
Described receiving element, also for receiving the user data requests response message that described HSS feeds back; Described user data requests response message comprises the user signing contract information of described UE.
9. the MME according to claim 6 or 7, is characterized in that, described handover request message is S1-AP UE Context Modification Request S1-AP UE context modification request message.
10. a base station, is characterized in that, comprising:
Receiving element, for receiving the handover request message that mobile management entity MME sends according to described circuit domain dropping CSFB access request; Described handoff request message draws together the session Handover Number STN-SR of the ability parameter of UE and the SRVCC of described UE; The ability parameter of described UE is for representing that described UE possesses injection continuous voice call SRVCC ability frequently; Described STN-SR represents that described MME supports SRVCC and described SRVCC opens to described UE by described MME;
Trigger element, for when the described SRVCC flow process of the suitable triggering of described UE current network conditions is determined according to the measurement report that described UE reports in described base station, according to the ability parameter of described UE comprised in the described handover request message that described receiving element receives and the STN-SR of described UE, when there is no VoLTE voice bearer, trigger described SRVCC flow process, and send switching response message to described MME, so that described MME is after the switching response message receiving described base station feedback, instruction according to described switching response message sends the instruction of SRVCC business to moving exchanging center MSC, so that described MSC performs SRVCC flow process according to described SRVCC business instruction,
Wherein, described SRVCC flow process comprises: described MSC sends resource allocation request according to the instruction of described SRVCC business to IP Multimedia System IMS, makes described IMS indicate described MSC to set up resource needed for CS carrying for described UE distributes according to described resource allocation request.
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