CN103561432A

CN103561432A - Single radio voice call continuity transfer method, equipment and system

Info

Publication number: CN103561432A
Application number: CN201310516749.7A
Authority: CN
Inventors: 简海燕
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2013-10-28
Filing date: 2013-10-28
Publication date: 2014-02-05
Anticipated expiration: 2033-10-28
Also published as: WO2015062468A1; CN103561432B

Abstract

The embodiment of the invention provides a single radio voice call continuity (SRVCC) transfer method, equipment and system. According to the method, P-CSCF equipment obtains a session transfer number for SRVCC (STN-SR), the STN-SR is sent to PCRF equipment so that the PCRF equipment can send the STN-SR to an MME for storage, and therefore by means of the concise method, the situation that E-CSCF/EATF equipment chosen by I-CSCF is consistent with E-CSCF/EATF equipment chosen by call establishment is guaranteed.

Description

Method, equipment and system that a kind of Single Radio Voice Call Continuity switches

Technical field

The present invention relates to the communications field, refer more particularly to a kind of SRVCC(Single Radio Voice Call Continuity, Single Radio Voice Call Continuity) method, the equipment and system that switch.

Background technology

In the process of establishing of emergency call session, when user initiates urgent call, subscriber equipment sends setup requests to IP Multimedia System (IP Multimedia Subsystem, IMS) (the Proxy-Call Session Control Function of the P-CSCF equipment in network, Proxy-Call Session Control Function) equipment, P-CSCF equipment is judged as urgent call, send setup requests to E-CSCF(Emergency-Call Session Control Function, Emergency-Call Session Control Function) equipment, by E-CSCF equipment, be routed to EATF(Emergency Access Transfer Function again, urgent access translation function) equipment, E-CSCF equipment or EATF equipment retain STN-SR(Session Transfer Number for SRVCC, the session Handover Number of SRVCC), for the handoff procedure of follow-up execution urgent call is prepared, then by E-CSCF equipment, the information of described call path is sent to PSAP(Public Safety Answering Point, public safety maintenance centre), wherein, public safety maintenance centre is also referred to as EC.When subscriber equipment initiates to switch, this subscriber equipment is to eNodeB(E-UTRAN NodeB, E-UTRAN NodeB) send handover request, this eNodeB is to MME(Mobility Management Entity, mobile management entity) send handover request, MME receives after handover request, judge whether the calling that this subscriber equipment is initiated is urgent call, if, handover request is sent to SRVCC IWF(Interworking Function, interoperability function) equipment, and to notify this handover request of SRVCC IWF equipment be the handover request in urgent call, SRVCC IWF equipment is received after handover request, be judged as the handover request in urgent call, SRVCC IWF equipment generates STN-SR, send to the I-CSCF equipment of E-CSCF equipment or EATF equipment place network to carry out handoff procedure handover request.

If while having a plurality of E-CSCF/EATF equipment in IMS network, the STN-SR that SRVCC IWF equipment generates when subscriber equipment switches probably with ATCF(Access Transfer Control Function, access switching control function)/ATGW(Access Transfer Gateway, access switching gateway) STN-SR generating when this subscriber equipment is initiated registration is different, makes handoff failure.

Summary of the invention

A kind of method that the embodiment of the present invention provides SRVCC to switch, is intended to solve the E-CSCF/EATF equipment that how to make E-CSCF/EATF equipment that I-CSCF chooses and call setup choose and is consistent.

First aspect, a kind of method that Single Radio Voice Call Continuity SRVCC switches, described method comprises:

Proxy-Call Session Control Function P-CSCF equipment is in the situation that receiving session establishment message, obtain the session Handover Number STN-SR of Single Radio Voice Call Continuity SRVCC, described session establishment message comprises the response message of session establishment request or session establishment request, and described STN-SR at least comprises the routing iinformation of Session Anchor equipment;

When described P-CSCF equipment sends Qos control message to mobile management entity MME, in described Qos control message, carry described STN-SR, to notify described MME at UE(User Equipment, while subscriber equipment) initiating to switch, according to described STN-SR, to described Session Anchor equipment, send handover request.

In conjunction with first aspect, in the possible implementation of the first of first aspect, described P-CSCF equipment is when receiving session establishment message, and described P-CSCF equipment obtains the session Handover Number STN-SR of SRVCC, comprising:

Described P-CSCF equipment is set up request in the situation that receive the emergency call session of UE transmission, sets up one or more generations STN-SR in the following information of carrying in request according to described emergency call session:

The destination address of described urgent call, user's accessing position information, subscriber card sign, customer equipment identification.

In conjunction with first aspect, in the possible implementation of the second of first aspect, described P-CSCF equipment is when receiving session establishment message, and described P-CSCF equipment obtains the session Handover Number STN-SR of SRVCC, comprising:

Described P-CSCF equipment is set up request in the situation that receive the emergency call session that UE sends, and according to one or more in pre-stored following information, generates STN-SR:

The described emergency call session that receives described P-CSCF equipment transmission is set up the address of the down hop network element of request, the address of the Session Anchor equipment that during registration, user selects, the address of the Session Anchor equipment of selecting when user is unregistered.

In conjunction with first aspect, in the third possible implementation of first aspect, described P-CSCF equipment is when receiving session establishment message, and described P-CSCF equipment obtains the session Handover Number STN-SR of SRVCC, comprising:

When described P-CSCF equipment is set up request in the emergency call session that receives UE transmission, to described Session Anchor equipment, send described emergency call session and set up request;

Described P-CSCF equipment receives the emergency call session of described Session Anchor equipment transmission and sets up the response message of request, and described emergency call session is set up in the response message of asking and carried described STN-SR.

In conjunction with first aspect, in the 4th kind of possible implementation of first aspect, described P-CSCF equipment is when receiving session establishment message, and described P-CSCF equipment obtains the session Handover Number STN-SR of SRVCC, comprising:

Described P-CSCF equipment is in the situation that receive the urgent call call-back session establishment request that described Session Anchor equipment sends, and described P-CSCF equipment generates described STN-SR according to one or more in the following information of carrying in the request of described urgent call call-back session establishment;

The address of described Session Anchor equipment, user's accessing position information, subscriber card sign, customer equipment identification.

In conjunction with first aspect, in the 5th kind of possible implementation of first aspect, described P-CSCF equipment is when receiving session establishment message, and described P-CSCF equipment obtains the session Handover Number STN-SR of SRVCC, comprising:

Described P-CSCF equipment is in the situation that receive the urgent call call-back session establishment request that described Session Anchor equipment sends, and described P-CSCF equipment generates described STN-SR according to one or more in pre-stored following information;

Send the request of described urgent call call-back session establishment to the network element address of described P-CSCF equipment, the address of the Session Anchor equipment that during registration, user selects, the address of the Session Anchor equipment of selecting when user is unregistered.

In conjunction with first aspect, in the 6th kind of possible implementation of first aspect, described P-CSCF equipment is when receiving session establishment message, and described P-CSCF equipment obtains the session Handover Number STN-SR of SRVCC, comprising:

Described P-CSCF equipment is in the situation that receive the urgent call call-back session establishment request that described Session Anchor equipment sends, the urgent call call-back session establishment acquisition request STN-SR sending according to described Session Anchor equipment.

In conjunction with first aspect, in the 7th kind of possible implementation of first aspect, described P-CSCF equipment is when receiving session establishment message, and described P-CSCF equipment obtains the session Handover Number STN-SR of SRVCC, comprising:

Described P-CSCF equipment is in the situation that receive the ordinary call session establishment request that described UE sends, and described P-CSCF equipment generates described STN-SR according to one or more in pre-stored following information;

User's accessing position information, subscriber card sign, customer equipment identification;

Described P-CSCF equipment is in the situation that receive the ordinary call session establishment request that described Session Anchor equipment sends, and described P-CSCF equipment generates described STN-SR according to one or more in following information;

User's accessing position information, subscriber card sign, customer equipment identification, the address of described Session Anchor equipment.

In conjunction with first aspect, in the 8th kind of possible implementation of first aspect, described P-CSCF equipment is when receiving session establishment message, and described P-CSCF equipment obtains the session Handover Number STN-SR of SRVCC, comprising:

Described P-CSCF equipment is in the situation that receive the ordinary call session establishment request that UE sends, and described P-CSCF equipment generates described STN-SR according to one or more in following information:

The address of upper hop network element, the address of the Session Anchor equipment that during registration, user selects, the address of the Session Anchor equipment of selecting when user is unregistered;

The address of down hop network element, the address of the Session Anchor equipment that during registration, user selects, the address of the Session Anchor equipment of selecting when user is unregistered.

In conjunction with first aspect, in the 9th kind of possible implementation of first aspect, described P-CSCF equipment is when receiving session establishment message, and described P-CSCF equipment obtains the session Handover Number STN-SR of SRVCC, comprising:

Described P-CSCF equipment in the situation that receive the ordinary call session establishment request that UE sends, sends the request of described ordinary call session establishment to described Session Anchor equipment;

Described P-CSCF equipment receives the response message of the described ordinary call session establishment request of described Session Anchor equipment transmission, in the response message of described ordinary call session establishment request, carries described STN-SR.

In conjunction with first aspect, in the tenth kind of possible implementation of first aspect, described P-CSCF equipment is when receiving session establishment message, and described P-CSCF equipment obtains the session Handover Number STN-SR of SRVCC, comprising:

Described P-CSCF equipment in the situation that receive the ordinary call session establishment request that described Session Anchor equipment sends, sends the request of described ordinary call session establishment to UE, in the request of described ordinary call session establishment, carries STN-SR;

Described P-CSCF equipment receives the response message of the described ordinary call session establishment request of described UE transmission, sends the response message of described ordinary call session establishment request to described Session Anchor equipment.

Second aspect, a kind of method that Single Radio Voice Call Continuity SRVCC switches, described method comprises:

Mobile management entity MME receives the Qos control message that P-CSCF equipment sends, and in described Qos control message, carries STN-SR;

Described MME, when UE initiates to switch, sends handover request according to described STN-SR to described Session Anchor equipment.

The third aspect, a kind of Proxy-Call Session Control Function P-CSCF equipment, described equipment comprises:

Acquiring unit, for in the situation that receiving session establishment message, obtain the session Handover Number STN-SR of Single Radio Voice Call Continuity SRVCC, described session establishment message comprises the response message of session establishment request or session establishment request, and described STN-SR at least comprises the routing iinformation of Session Anchor equipment;

Transmitting element, while being used for sending Qos control message to mobile management entity MME, in described Qos control message, carry described STN-SR, to notify described MME when UE initiates to switch, according to described STN-SR, to described Session Anchor equipment, send handover request.

In conjunction with the third aspect, in the possible implementation of the first of the third aspect, described acquiring unit, specifically for:

In the situation that receive the emergency call session foundation request that UE sends, one or more in the following information of carrying in asking according to described emergency call session foundation generate STN-SR:

In conjunction with the third aspect, in the possible implementation of the second of the third aspect, described acquiring unit, specifically for:

In the situation that receive the emergency call session that UE sends, set up request, according to one or more in pre-stored following information, generate STN-SR:

In conjunction with the third aspect, in the third possible implementation of the third aspect, described acquiring unit, specifically for:

When the emergency call session that receives UE transmission is set up request, to described Session Anchor equipment, send described emergency call session and set up request;

The emergency call session that receives described Session Anchor equipment transmission is set up the response message of request, and described emergency call session is set up in the response message of asking and carried described STN-SR.

In conjunction with the third aspect, in the 4th kind of possible implementation of the third aspect, described acquiring unit, specifically for:

In the situation that receive the urgent call call-back session establishment request that described Session Anchor equipment sends, according to one or more in the following information of carrying in the request of described urgent call call-back session establishment, generate described STN-SR;

In conjunction with the third aspect, in the 5th kind of possible implementation of the third aspect, described acquiring unit, specifically for:

In the situation that receive the urgent call call-back session establishment request that described Session Anchor equipment sends, according to one or more in pre-stored following information, generate described STN-SR;

In conjunction with the third aspect, in the 6th kind of possible implementation of the third aspect, described acquiring unit, specifically for:

In the situation that receive the urgent call call-back session establishment request that described Session Anchor equipment sends, the urgent call call-back session establishment acquisition request STN-SR sending according to described Session Anchor equipment.

In conjunction with the third aspect, in the 7th kind of possible implementation of the third aspect, described acquiring unit, specifically for:

In the situation that receive the ordinary call session establishment request that described UE sends, according to one or more in pre-stored following information, generate described STN-SR;

In the situation that receive the ordinary call session establishment request that described Session Anchor equipment sends, according to one or more in following information, generate described STN-SR;

In conjunction with the third aspect, in the 8th kind of possible implementation of the third aspect, described acquiring unit, specifically for:

In the situation that receive the ordinary call session establishment request that UE sends, according to one or more in following information, generate described STN-SR:

In conjunction with the third aspect, in the 9th kind of possible implementation of the third aspect, described acquiring unit, specifically for:

In the situation that receive the ordinary call session establishment request that UE sends, to described Session Anchor equipment, send the request of described ordinary call session establishment;

The response message that receives the described ordinary call session establishment request of described Session Anchor equipment transmission, carries described STN-SR in the response message of described ordinary call session establishment request.

In conjunction with the third aspect, in the tenth kind of possible implementation of the third aspect, described acquiring unit, specifically for:

In the situation that receive the ordinary call session establishment request that described Session Anchor equipment sends, to UE, send the request of described ordinary call session establishment, in the request of described ordinary call session establishment, carry STN-SR;

Receive the response message of the described ordinary call session establishment request of described UE transmission, to described Session Anchor equipment, send the response message of described ordinary call session establishment request.

Fourth aspect, a kind of mobile management entity MME, described MME comprises:

Receiving element, the Qos control message sending for receiving P-CSCF equipment, carries STN-SR in described Qos control message;

Transmitting element, for when UE initiates to switch, sends handover request according to described STN-SR to described Session Anchor equipment.

The 5th aspect, a kind of system of singly treating that the continuous SRVCC of voice switches, described system comprises Proxy-Call Session Control Function P-CSCF equipment and mobile management entity MME, wherein,

Described P-CSCF equipment, for in the situation that receiving session establishment message, described P-CSCF equipment obtains the session Handover Number STN-SR of Single Radio Voice Call Continuity SRVCC, described session establishment message comprises the response message of session establishment request or session establishment request, and described STN-SR at least comprises the routing iinformation of Session Anchor equipment; While sending Qos control message to mobile management entity MME, in described Qos control message, carry described STN-SR, to notify described MME when UE initiates to switch, according to described STN-SR, to described Session Anchor equipment, send handover request.

Described MME, the Qos control message sending for receiving mobile management entity MME, carries STN-SR in described Qos control message; When UE initiates to switch, according to described STN-SR, to described Session Anchor equipment, send handover request.

A kind of method that the embodiment of the present invention provides SRVCC to switch, in described method, P-CSCF equipment obtains the session Handover Number STN-SR of SRVCC, and described STN-SR is sent to PCRF(Policy and Charging Rules Function, "Policy and Charging Rules Function) equipment, so that sending to MME by described STN-SR, stores described PCRF equipment, thereby guarantee I-CSCF(Interrogating-Call Session Control Function by succinct method, interrogation-call session control function) the E-CSCF/EATF equipment that the E-CSCF/EATF equipment that equipment is chosen and call setup are chosen is consistent.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is the method flow diagram that a kind of SRVCC that the embodiment of the present invention provides switches;

Fig. 2 is the method schematic diagram that a kind of SRVCC that the embodiment of the present invention provides switches;

Fig. 3 is the method schematic diagram that P-CSCF equipment obtains the session Handover Number STN-SR of SRVCC under urgent call scene;

Fig. 4 is the another kind of method schematic diagram that P-CSCF equipment obtains the session Handover Number STN-SR of SRVCC under urgent call scene;

Fig. 5 is the method schematic diagram that a kind of SRVCC that the embodiment of the present invention provides switches;

Fig. 6 is the method schematic diagram that a kind of SRVCC that the embodiment of the present invention provides switches;

Fig. 7 be the embodiment of the present invention provide a kind of under urgent call call-back scene P-CSCF equipment obtain the method flow diagram of the session Handover Number STN-SR of SRVCC;

Fig. 8 is the another kind of method flow diagram that P-CSCF equipment under urgent call call-back scene that the embodiment of the present invention provides obtains the session Handover Number STN-SR of SRVCC;

Fig. 9 is the method schematic diagram that a kind of SRVCC that the embodiment of the present invention provides switches;

Figure 10 is the method schematic diagram that a kind of SRVCC that the embodiment of the present invention provides switches;

The method flow diagram that obtains STN-SR of ATCF is provided under a kind of caller scene of providing of the embodiment of the present invention Figure 11;

Figure 12 is the another kind of method flow diagram that obtains STN-SR under caller scene that the embodiment of the present invention provides;

Figure 13 be the embodiment of the present invention provide under called scene, obtain the method flow diagram of STN-SR;

Figure 14 is a kind of method flow diagram that obtains STN-SR under called scene that the embodiment of the present invention provides;

Figure 15 is the method schematic diagram that a kind of SRVCC that the embodiment of the present invention provides switches;

Figure 16 is the method schematic diagram that a kind of SRVCC that the embodiment of the present invention provides switches;

Figure 17 is the method schematic diagram that a kind of SRVCC that the embodiment of the present invention provides switches;

Figure 18 is the method flow diagram that a kind of Single Radio Voice Call Continuity SRVCC that the embodiment of the present invention provides switches;

Figure 19 is a kind of Proxy-Call Session Control Function P-CSCF equipment structure chart that the embodiment of the present invention provides;

Figure 20 is the equipment structure chart of a kind of mobile management entity MME of providing of the embodiment of the present invention;

Figure 21 is a kind of system construction drawing of singly treating that the continuous SRVCC of voice switches;

Figure 22 is the structural representation of a kind of PCSCF of providing of the embodiment of the present invention.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.

With reference to figure 1, Fig. 1 is the method flow diagram that a kind of SRVCC that the embodiment of the present invention provides switches.As shown in Figure 1, said method comprising the steps of:

Step 101, Proxy-Call Session Control Function P-CSCF equipment is in the situation that receiving session establishment message, described P-CSCF equipment obtains the session Handover Number STN-SR of Single Radio Voice Call Continuity SRVCC, described session establishment message comprises the response message of session establishment request or session establishment request, and described STN-SR at least comprises the routing iinformation of Session Anchor equipment;

Alternatively, described P-CSCF equipment is when receiving session establishment message, and described agent call session control (Proxy-Call Session Control Function, P-CSCF equipment) is obtained STN-SR, comprising:

Described P-CSCF equipment is receiving UE(User Equipment, subscriber equipment) emergency call session that sends sets up in the situation of request, and according to described emergency call session, set up one or more in the following information of carrying in request and generate STN-SR:

Described urgent call destination address, user's accessing position information, subscriber card sign, customer equipment identification.

Described urgent call destination address comprises emergency call session control function (Emergency – Call Session Control Function, E-CSCF) address of equipment or promptly access the address of handoff functionality (Emergency Access Transfer Function, EATF) equipment.

Concrete, be similar to by obtaining STN-SR as next table:

Wherein urgent destination address and user's accessing position information all obtain from SIP.

Alternatively, described P-CSCF equipment is when receiving session establishment message, and described P-CSCF equipment obtains the session Handover Number STN-SR of SRVCC, comprising:

Described P-CSCF equipment sends the address that described emergency call session is set up the down hop network element of request, the address of the Session Anchor equipment that during registration, user selects, the address of the Session Anchor equipment of selecting when user is unregistered.

Wherein, the address of down hop network element is that initial request is sent out and directly sent to next network element, such as PCSCF/ATCF equipment in Fig. 2 is the down hop network element of UE, E-CSCF equipment is the down hop network element of P-CSCF equipment/ATCF equipment, EATF equipment is the down hop network element of E-CSCF equipment, and PCSCF/ATCF equipment is the upper hop network element of E-CSCF equipment, E-CSCF equipment is the upper hop network element of EATF equipment.

The address of the Session Anchor equipment that during described registration, user selects can be the address of access switching control function (Access Transfer Control Function, ATCF) equipment.

Wherein, the destination address of described urgent call is emergency call number for example 110, the corresponding destination addresses such as 119, described user's accessing position information is P-Acces-Network-Info, described subscriber card sign refers to that mobile terminal is as the USIM of mobile phone (Universal Subscriber Identity Module, USIM) or IP multimedia service identity module (IP Multimedia Services Identity Module, IMSI), described customer equipment identification refers to that mobile terminal is as the International Mobile Equipment Identity code of mobile phone (International Mobile Equipment Identity, IMEI).

Particularly, with reference to figure 2, Fig. 2 is the method schematic diagram that a kind of SRVCC that the embodiment of the present invention provides switches.

As shown in Figure 2, step 4.1, when user initiates urgent call, sends setup requests to the P-CSCF equipment in IMS network;

Step 4.2, P-CSCF equipment is judged as urgent call, send setup requests to E-CSCF equipment again route to EATF equipment, described E-CSCF equipment or EATF equipment holding calling path, for the handoff procedure of follow-up execution urgent call ready;

Step 4.3, described E-CSCF equipment or EATF equipment send to EC PSAP by described call path.

Step 7.1, the STN-SR that described P-CSCF equipment is used pre-configured data to generate, described P-CSCF equipment sends to PCRF equipment by described STN-SR;

Step 7.2, described gateway (Serving GateWay, S-GW) or Packet Data Network (Packet Data Network, P-GW) send to MME storage by described STN-SR;

Step 7.3, described MME stores described STN-SR.

Step 5.1, base station eNodeB sends handover request to MME;

Step 5.2, when MME sends handover request, the STN-SR that preferentially uses MME to preserve, sends to SRVCC IWF equipment by described STN-SR;

Step 5.3, described SRVCC IWF equipment sends to I-CSCF equipment by described STN-SR;

Step 5.4, described I-CSCF equipment is accurately routed to E-CSCF equipment or EATF equipment according to described STN-SR by handover request.

When described P-CSCF equipment is set up request in the emergency call session that receives UE, to described Session Anchor device orientation, send described emergency call session and set up request;

Concrete, with reference to figure 2, in step 7.1, P-CSCF equipment can obtain STN-SR from the sip response message of E-CSCF equipment or EATF equipment, and sends to PCRF equipment.

Meanwhile, concrete, can be with reference to figure 3, Fig. 3 is the method schematic diagram that P-CSCF equipment obtains the session Handover Number STN-SR of SRVCC under urgent call scene.As shown in Figure 3:

Step 301, when user initiates urgent call, sends setup requests INVITE to the P-CSCF equipment in IMS network;

Step 302, P-CSCF equipment is judged as urgent call, sends setup requests to E-CSCF equipment.

Step 303, E-CSCF equipment sends to EATF equipment by described call request, and notice urgent call occurs.

Step 304, EATF device processes INVITE, and be retained in call path, ready for the handoff procedure of follow-up execution urgent call, then described calling is sent to E-CSCF equipment to continue route.

Step 305, E-CSCF equipment sends to EC PSAP by described call path.

Step 306, E-CSCF equipment is received 183 responses of INVITE request, carries called media information in message, forward pass responds the equipment to EATF.

Step 307, EATF equipment is received after 183 responses, finishes dealing with after 183 responses, forward pass responds the equipment to E-CSCF.And in message, be provided for the STN-SR that switches.

Step 308, E-CSCF equipment receives that after 183 responses of EATF equipment, forward pass is to P-CSCF equipment.

Step 309, P-CSCF equipment is received after 183 responses, according to the media information in message, carries out service quality (Quality of Service, QoS) control procedure, provides STN-SR parameter in controlling request simultaneously.

Step 310, P-CSCF equipment completes after processing, sends 183 responses to calling UE;

Step 311, when MME initiates to switch, to eMSC(enhanced MSC server, strengthens Mobile Switching Center Server) send handover request, and in request message, carry the STN-SR of preservation.

Step 312, eMSC is according to STN-SR, and the INVITE of route handoff asks the I-CSCF equipment to territory, EATF equipment place.

Step 313, I-CSCF equipment according to STN-SR by request message route to ETAF equipment, ETAF equipment is carried out hand-off process according to STN-SR, and associated switches session and former session.

With reference to figure 4, Fig. 4 is the another kind of method schematic diagram that P-CSCF equipment obtains the session Handover Number STN-SR of SRVCC under urgent call scene.As shown in Figure 4:

Step 401, when user initiates urgent call, sends setup requests INVITE to the P-CSCF equipment in IMS network;

Step 402, P-CSCF equipment is judged as urgent call, sends setup requests to E-CSCF equipment, before forwarding messages, judgement need to be carried out local media grappling, inserts ATCF equipment in call path, directly by message route to ATCF equipment.

Step 403, ATCF equipment is received after message, is retained in call path, ready for the handoff procedure of follow-up execution urgent call, continuation will ask route to E-CSCF equipment.

Step 404, E-CSCF equipment sends to EATF equipment by described call request, and notice urgent call occurs.

Step 405, EATF device processes INVITE, and be retained in call path, ready for the handoff procedure of follow-up execution urgent call, then described calling is sent to E-CSCF equipment to continue route.

Step 406, E-CSCF equipment sends to EC PSAP by described call path.

Step 407, E-CSCF equipment is received 183 responses of INVITE request, carries called media information in message, forward pass responds the equipment to EATF.

Step 408, EATF equipment is received after 183 responses, finishes dealing with after 183 responses, forward pass responds the equipment to E-CSCF.

Step 409, E-CSCF equipment receives that after 183 responses of EATF equipment, forward pass is to ATCF equipment.

Step 410, ATCF equipment receives that after 183 responses of E-CSCF equipment, forward pass is to P-CSCF equipment.And in message, be provided for the STN-SR that switches.

Step 411, P-CSCF equipment is received after 183 responses, according to the media information in message, carries out QoS control procedure, provides STN-SR parameter in controlling request simultaneously.

Step 412, P-CSCF equipment completes after processing, sends 183 responses to calling UE.

Step 413, when MME initiates to switch, sends handover request to eMSC, and in request message, carries the STN-SR of preservation.

Step 414, eMSC is according to STN-SR, and the INVITE of route handoff asks the I-CSCF equipment to territory, ATCF equipment place.

Step 415, I-CSCF equipment according to STN-SR by request message route to ATCF equipment, ATCF equipment is carried out hand-off process according to STN-SR, and associatedly switches session and former session.

With reference to figure 5, Fig. 5 is the method schematic diagram that a kind of SRVCC that the embodiment of the present invention provides switches.As shown in Figure 5, step 4.1, when user initiates urgent call, sends setup requests to the P-CSCF equipment in IMS network;

Step 4.2, P-CSCF equipment sends to ATCF equipment by described setup requests;

Step 4.3, sends to E-CSCF equipment or EATF equipment by described setup requests;

Step 4.4, described E-CSCF equipment or EATF equipment send to PSAP by described setup requests.

Step 7.1, ATCF equipment carries STN-SR to P-CSCF equipment in sip response message, and described P-CSCF equipment sends to PCRF equipment by described STN-SR;

Step 7.2, described PCRF equipment sends to described S-GW or P-GW by described STN-SR;

Step 7.3, described S-GW or P-GW send to MME by described STN-SR, so that described MME stores described STN-SR.

Step 5.1, base station eNodeB sends handover request to MME;

Step 5.4, described I-CSCF equipment is accurately routed to ATCF equipment according to described STN-SR by handover request.

Described P-CSCF equipment is in the situation that receive the urgent call call-back session establishment request that described Session Anchor equipment sends, and described P-CSCF equipment is according to described urgent call call-back session Emergency PSAP(Public Safety Answering Point) callback sets up one or more in the following information of carrying in request and generates described STN-SR;

Sending described urgent call call-back session Emergency PSAP(Public Safety Answering Point) the callback request of setting up is to the network element address of described P-CSCF equipment, the address of the Session Anchor equipment that during registration, user selects, the address of the Session Anchor equipment of selecting when user is unregistered.

The address of the Session Anchor equipment that during described registration, user selects can be ATCF device address or ATGW address.

Concrete, with reference to figure 6, Fig. 6 is the method schematic diagram that a kind of SRVCC that the embodiment of the present invention provides switches.

Step 6.1, in the process of establishing of urgent call call-back session, PSAP sends to I-CSCF equipment by callback session request;

Step 6.2, described I-CSCF equipment sends to S-CSCF equipment by described callback session request;

Step 6.3, S-CSCF device trigger AS(Application Server, application server) carry out Service control, comprise the Service control of business continuance, then AS will speech channel by returning S-CSCF equipment;

Step 6.4, described S-CSCF equipment sends to ATCF equipment by described callback session request;

Step 6.5, described ATCF equipment sends to P-CSCF equipment by described callback session request;

Step 6.6, described P-CSCF equipment sends to user equipment (UE) by described callback session request.

Step 7.2, described PCRF equipment sends to S-GW or P-GW by described STN-SR;

Step 7.3, described S-GW or P-GW send to MME storage by described STN-SR.

Step 2.1, base station eNodeB sends handover request to MME;

Step 2.2, when MME sends handover request, the STN-SR that preferentially uses MME to preserve, sends to SRVCC IWF equipment by described STN-SR;

Step 2.3, described SRVCC IWF equipment sends to I-CSCF equipment by described STN-SR;

Step 2.4, described I-CSCF equipment is accurately routed to ATCF equipment according to described STN-SR by handover request.

Described P-CSCF equipment is in the situation that receiving the request of urgent call call-back session establishment, according to the urgent call call-back session establishment acquisition request STN-SR of described Session Anchor equipment transmission.

Concrete, with reference to figure 7, Fig. 7 be the embodiment of the present invention provide a kind of under urgent call call-back scene P-CSCF equipment obtain the method flow diagram of the session Handover Number STN-SR of SRVCC.As shown in Figure 7,

Step 701, S-CSCF equipment are received called initial session foundation request INVITE, S-CSCF equipment is carried out called AS trigger process, comprise and trigger SCC(Service Centralization and Continuity, in services set and continuity) process of AS, S-CSCF equipment sends called initial session and sets up request INVITE to AS;

Step 702, SCC AS receive initial session foundation request INVITE, and SCC AS processes session information, and is retained in call path, and then forward pass initial session is set up request INVITE to S-CSCF equipment;

Step 703, S-CSCF equipment receive that the initial session of sending back before SCC AS sets up INVITE request, and S-CSCF equipment sends the ATCF equipment of callee side;

Step 704, ATCF equipment are received user's session establishment request, be retained in call path, and forward pass initial session are set up request INVITE to P-CSCF equipment.And in message, provide STN-SR;

Step 705, P-CSCF equipment receive that initial session sets up INVITE request, and forward is to UE;

Step 706, UE receive that initial session sets up INVITE request, return to 183 responses to P-CSCF equipment.Response message can carry media information;

Step 707, P-CSCF equipment are received 183 responses, carry out QoS control procedure,

Step 708, P-CSCF device forwards responds the equipment to ATCF.

Step 709, ATCF equipment are received 183 responses, and transmitted response is to S-CSCF equipment;

Step 710, S-CSCF equipment are received 183 responses, are transmitted to SCC AS;

Step 711, SCC AS receive after 183 responses, are transmitted to S-CSCF equipment;

Step 712, S-CSCF equipment are received after 183 responses of SCC AS, are transmitted to Calling Side;

When step 713, MME initiate to switch, to eMSC, send handover request, and in request message, carry the STN-SR of preservation.

Step 714, eMSC are according to STN-SR, and the INVITE of route handoff asks the I-CSCF equipment to territory, ATCF equipment place.

Step 715, I-CSCF equipment according to STN-SR by request message route to ATCF equipment, ATCF equipment is associated switches session and former session, carries out hand-off process.

In the process of establishing of urgent call call-back session, SCC AS carries STN-SR to P-CSCF equipment in sip request message.

With reference to figure 8, Fig. 8 is the another kind of method flow diagram that P-CSCF equipment under urgent call call-back scene that the embodiment of the present invention provides obtains the session Handover Number STN-SR of SRVCC.As shown in Figure 8,

Step 801, S-CSCF equipment are received called initial session foundation request INVITE, and S-CSCF equipment is carried out called AS trigger process, comprises the process that triggers SCC AS;

Step 802, S-CSCF equipment sends called initial session and sets up request INVITE to AS;

Step 803, SCC AS receive initial session foundation request INVITE, and SCC AS processes session information, and is retained in call path, and then forward pass initial session is set up request INVITE to S-CSCF equipment, and STN-SR is provided in message;

Step 804, S-CSCF equipment sends initial session to I-CSCF equipment and sets up request INVITE;

Step 805, P-CSCF equipment receive that initial session sets up INVITE request, and forward is to UE;

Step 806, UE receive that initial session sets up INVITE request, return to 183 responses to P-CSCF equipment, and response message can carry media information.

Step 807, P-CSCF equipment are received 183 responses, carry out QoS control procedure, and transmitted response are to S-CSCF equipment;

Step 808, S-CSCF equipment are received 183 responses, are transmitted to SCC AS;

Step 809, SCC AS receive after 183 responses, are transmitted to S-CSCF equipment;

Step 810, S-CSCF equipment are received after 183 responses of SCC AS, are transmitted to Calling Side;

When step 811, MME initiate to switch, to eMSC, send handover request, and in request message, carry the STN-SR of preservation;

Step 812, eMSC are according to STN-SR, and the INVITE of route handoff asks the I-CSCF equipment to territory, SCC AS place;

Step 813, I-CSCF equipment according to STN-SR by request message route to SCC AS, SCC AS carries out hand-off process according to STN-SR, and associated switches session and former session.

With reference to figure 9, Fig. 9 is the method schematic diagram that a kind of SRVCC that the embodiment of the present invention provides switches.As shown in Figure 9,

Step 6.3, S-CSCF device trigger AS carries out Service control, comprises the Service control of business continuance, then AS will speech channel by returning S-CSCF equipment.In request, carry STN-SR;

Step 6.4, described S-CSCF equipment sends to P-CSCF equipment by described callback session request;

Step 6.5, described P-CSCF equipment sends to user equipment (UE) by described callback session request.

Step 7.1, described P-CSCF equipment sends to PCRF equipment by described STN-SR;

Step 7.2, described PCRF equipment sends to S-GW or P-GW by described STN-SR;

Step 7.3, described S-GW or P-GW send to MME by described STN-SR.

Step 2.1, base station eNodeB sends handover request to MME;

Step 2.2, when MME sends handover request, the STN-SR obtaining from PCRF equipment that preferentially uses MME to preserve, sends to SRVCC IWF equipment by described STN-SR;

Step 2.4, described I-CSCF equipment is accurately routed to AS according to described STN-SR by handover request.

Described P-CSCF equipment is in the situation that receive the ordinary call session establishment request that UE sends, and described P-CSCF equipment generates described STN-SR according to one or more in pre-stored following information;

The address of described Session Anchor equipment comprises ATCF device address or ATGW address.

With reference to Figure 10, Figure 10 is the method schematic diagram that a kind of SRVCC that the embodiment of the present invention provides switches.As shown in figure 10, step 2.1, user sends ordinary call request to P-CSCF equipment;

Step 2.2, described P-CSCF equipment sends ordinary call request to ATCF equipment;

Step 2.3, described ATCF equipment sends ordinary call request to described S-CSCF equipment;

Step 2.4, S-CSCF device trigger AS carries out Service control, comprises the Service control of business continuance, then AS will speech channel by returning S-CSCF equipment;

Step 2.5, described S-CSCF equipment sends to Callee by described ordinary call request.

Step 7.1, the STN-SR that described P-CSCF equipment is used pre-configured data to generate, and described STN-SR is sent to PCRF equipment;

Step 7.2, described PCRF equipment sends to S-GW or P-GW by described STN-SR;

Step 7.3, described S-GW or P-GW send to MME by described STN-SR.

Step 3.1, base station eNodeB sends handover request to MME;

Step 3.2, when MME sends handover request, the STN-SR that preferentially uses MME to preserve, sends to SRVCC IWF equipment by described STN-SR;

Step 3.3, described SRVCC IWF equipment sends to I-CSCF equipment by described STN-SR;

Step 3.4, described I-CSCF equipment is accurately routed to ATCF equipment according to described STN-SR by handover request.

Concrete, with reference to Figure 11, the method flow diagram that obtains STN-SR of ATCF equipment is provided under a kind of caller scene of providing of the embodiment of the present invention Figure 11.

Step 1101, when user initiates ordinary call, sends initial session and sets up request INVITE to the P-CSCF equipment in IMS network;

Step 1102, P-CSCF device forwards initial session is set up request INVITE to ATCF equipment.

Step 1103, ATCF equipment receives after message, ready for the handoff procedure of follow-up execution ordinary call, then initial session set up to request INVITE route to S-CSCF equipment.

Step 1104, S-CSCF equipment triggers the AS to SCC by described initial session request INVITE.

Step 1105, SCC AS processes INVITE, and is retained in call path, ready for the handoff procedure of follow-up execution ordinary call, then described initial session is set up to request INVITE and is sent to S-CSCF equipment to continue route.

Step 1106, S-CSCF equipment sends to callee side by described call path.

Step 1107, S-CSCF equipment is received 183 responses of INVITE request, carries called media information in message, forward pass responds the AS to SCC.

Step 1108, SCC AS receives after 183 responses, finishes dealing with after 183 responses, forward pass responds the equipment to S-CSCF.

Step 1109, S-CSCF equipment receives that after 183 responses of SCC AS, forward pass is to ATCF equipment.

Step 1110, ATCF equipment receives that after 183 responses of S-CSCF equipment, forward pass is to P-CSCF equipment.And in message, be provided for the STN-SR that switches.

Step 1111, P-CSCF equipment is received after 183 responses, according to the media information in message, carries out QoS control procedure, provides STN-SR parameter in controlling request simultaneously.

Step 1112, P-CSCF equipment completes after processing, sends 183 responses to calling UE.

Step 1113, when MME initiates to switch, sends handover request to eMSC, and in request message, carries the STN-SR of preservation.

Step 1114, eMSC is according to STN-SR, and the INVITE of route handoff asks the I-CSCF equipment to territory, ATCF equipment place.

Step 1115, I-CSCF equipment according to STN-SR by request message route to ATCF equipment, ATCF equipment is carried out hand-off process according to STN-SR, and associated switches session and former session.

Concrete, with reference to Figure 12, Figure 12 is the another kind of method flow diagram that obtains STN-SR under caller scene that the embodiment of the present invention provides.

Step 1201, when user initiates ordinary call, sends initial session and sets up request INVITE to the P-CSCF equipment in IMS network;

Step 1202, P-CSCF device forwards initial session is set up request INVITE to S-CSCF equipment.

Step 1203, S-CSCF equipment triggers the AS to SCC by described initial session request INVITE.

Step 1204, SCC AS processes INVITE, and is retained in call path, for the handoff procedure of follow-up execution ordinary call ready, then described initial session is set up to request INVITE and sent to S-CSCF equipment to continue route, and in message, be provided for the STN-SR of switching.

Step 1205, S-CSCF equipment sends to callee side by described call path.

Step 1206, S-CSCF equipment is received 183 responses of INVITE request, carries called media information in message.

Step 1207, S-CSCF equipment by 183 responses to SCC AS.

Step 1208, SCC AS receives after 183 responses, finishes dealing with after 183 responses, forward pass responds the equipment to S-CSCF, and carries STN-SR in 183 responses.

Step 1209, S-CSCF equipment receives that after 183 responses of SCC AS, forward pass is to P-CSCF equipment.

Step 1210, P-CSCF equipment is received after 183 responses, according to the media information in message, carries out QoS control procedure, provides STN-SR parameter in controlling request simultaneously.P-CSCF equipment completes after processing, sends 183 responses to calling UE.

When step 1211, MME initiate to switch, to eMSC, send handover request, and in request message, carry the STN-SR of preservation;

Step 1212:eMSC is according to STN-SR, and the INVITE of route handoff asks the I-CSCF equipment to territory, SCC AS place.

Step 1213:I-CSCF equipment according to STN-SR by request message route to SCC AS, SCC AS carries out hand-off process according to STN-SR, and associated switches session and former session.

Concrete, with reference to Figure 13, Figure 13 be the embodiment of the present invention provide under called scene, obtain the method flow diagram of STN-SR.

Step 1301, S-CSCF equipment are received called initial session foundation request INVITE, and S-CSCF equipment is carried out called AS trigger process, comprises the process that triggers SCC AS, and S-CSCF equipment sends called initial session and sets up request INVITE to AS;

Step 1302, SCC AS receive initial session foundation request INVITE, and SCC AS processes session information, and is retained in call path, and then forward pass initial session is set up request INVITE to S-CSCF equipment;

Step 1303, S-CSCF equipment receive that the initial session of sending back before SCC AS sets up INVITE request, and S-CSCF equipment sends the ATCF equipment of callee side;

Step 1304, ATCF equipment are received user's session establishment request, are retained in call path.

Step 1305, ATCF equipment forward pass initial session are set up request INVITE to P-CSCF equipment, and STN-SR is provided in message;

Step 1306, P-CSCF equipment receive that initial session sets up INVITE request, and forward is to UE;

Step 1307, UE receive that initial session sets up INVITE request, return to 183 responses to P-CSCF equipment.Response message can carry media information;

Step 1308, P-CSCF equipment are received 183 responses, carry out QoS control procedure, and transmitted response are to ATCF equipment.

Step 1309, ATCF equipment are received 183 responses, and transmitted response is to S-CSCF equipment;

Step 1310, S-CSCF equipment are received 183 responses, are transmitted to SCC AS;

Step 1311, SCC AS receive after 183 responses, are transmitted to S-CSCF equipment;

Step 1312, S-CSCF equipment are received after 183 responses of SCC AS, are transmitted to Calling Side;

When step 1313, MME initiate to switch, to eMSC, send handover request, and in request message, carry the STN-SR of preservation.

Step 1314, eMSC are according to STN-SR, and the INVITE of route handoff asks the I-CSCF equipment to territory, ATCF equipment place.

Step 1315, I-CSCF equipment according to STN-SR by request message route to ATCF equipment, ATCF equipment is associated switches session and former session, carries out hand-off process.

With reference to Figure 14, Figure 14 is a kind of method flow diagram that obtains STN-SR under called scene that the embodiment of the present invention provides.

Step 1401, S-CSCF equipment are received called initial session foundation request INVITE, and S-CSCF equipment is carried out called AS trigger process, comprises the process that triggers SCC AS, and S-CSCF equipment sends called initial session and sets up request INVITE to AS;

Step 1402, SCC AS receive initial session foundation request INVITE, and SCC AS processes session information, and is retained in call path.

Step 1403, SCC AS forward pass initial session is set up request INVITE to S-CSCF equipment, and STN-SR is provided in message.

Step 1404, S-CSCF equipment receive that the initial session of sending back before SCC AS sets up INVITE request, and S-CSCF equipment sends the P-CSCF equipment of callee side.

Step 1405, P-CSCF equipment receive that initial session sets up INVITE request, and forward is to UE;

Step 1406, UE receive that initial session sets up INVITE request, return to 183 responses to P-CSCF equipment.Response message can carry media information;

Step 1407, P-CSCF equipment are received 183 responses, carry out QoS control procedure, provide STN-SR parameter, and transmitted response are to S-CSCF equipment in controlling request simultaneously.

Step 1408, S-CSCF equipment are received 183 responses, are transmitted to SCC AS;

Step 1409, SCC AS receive after 183 responses, are transmitted to S-CSCF equipment;

Step 1410, S-CSCF equipment are received after 183 responses of SCC AS, are transmitted to Calling Side;

When step 1411, MME initiate to switch, to eMSC, send handover request, and in request message, carry the STN-SR of preservation;

Step 1412, eMSC are according to STN-SR, and the INVITE of route handoff asks the I-CSCF equipment to territory, SCC AS place;

Step 1413, I-CSCF equipment according to STN-SR by request message route to SCC AS, SCC AS carries out hand-off process according to STN-SR, and associated switches session and former session.

Concrete, with reference to Figure 15, Figure 15 is the method schematic diagram that a kind of SRVCC that the embodiment of the present invention provides switches.As shown in figure 15, step 2.1, user sends ordinary call request to P-CSCF equipment;

Step 7.1, described AS carries STN-SR in sip request message, and described STN-SR is sent to PCSCF, and P-CSCF equipment gets the STN-SR in message, and STN-SR is sent to PCRF equipment;

Step 7.2, described PCRF equipment sends to S-GW or P-GW by described STN-SR;

Step 7.3, described S-GW or P-GW send to MME by described STN-SR.

Step 3.1, base station eNodeB sends handover request to MME;

Step 3.2, when MME sends handover request, the STN-SR obtaining from PCRF equipment that preferentially uses MME to preserve, sends to SRVCC IWF equipment by described STN-SR;

Step 102, when described P-CSCF equipment sends Qos control message to mobile management entity MME, in described Qos control message, carry described STN-SR, to notify described MME when described UE initiates to switch, according to described STN-SR, to described Session Anchor equipment, send handover request.

Concrete, with reference to Figure 16, Figure 16 is the method schematic diagram that a kind of SRVCC that the embodiment of the present invention provides switches.As shown in figure 16, in session establishment request session setup procedure, P-CSCF equipment sends to PCRF equipment by STN-SR, described PCRF equipment sends to MME by S/P-GW by described STN-SR, described MME stores described STN-SR, when described MME initiates handover request, preferentially according to this STN-SR, described handover request is routed to destination.

Concrete, with reference to Figure 17, Figure 17 is the method schematic diagram that a kind of SRVCC that the embodiment of the present invention provides switches.As shown in figure 17,

Step 1701, P-CSCF sends Qos control message to PCRF equipment, in described Qos control message, carries STN-SR;

Step 1702, PCRF equipment sends described Qos control message to S-GW or P-GW;

Step 1703, S-GW or P-GW send to described MME the session request of setting up, and carry STN-SR described in setting up session request;

Step 1704, described MME sends described response of setting up session request to described S-GW or P-GW.A kind of method that the embodiment of the present invention provides SRVCC to switch, in described method, P-CSCF equipment obtains the session Handover Number STN-SR of SRVCC, and described STN-SR is sent to PCRF equipment, so that described PCRF equipment sends to MME by described STN-SR, store, thereby guarantee that by succinct method E-CSCF equipment EATF equipment E-CSCF equipment/EATF equipment equipment that E-CSCF equipment EATF equipment E-CSCF equipment/EATF equipment equipment that I-CSCF equipment is chosen and call setup are chosen is consistent.

With reference to Figure 18, Figure 18 is the method flow diagram that a kind of Single Radio Voice Call Continuity SRVCC that the embodiment of the present invention provides switches.Said method comprising the steps of:

Step 1801, MME receives the Qos control message that P-CSCF equipment sends, and in described Qos control message, carries STN-SR;

Step 1802, described MME, when UE initiates to switch, sends handover request according to described STN-SR to described Session Anchor equipment.

Concrete, the description with reference to Figure 16 and Figure 17, does not repeat them here.

A kind of method that the embodiment of the present invention provides SRVCC to switch, in described method, P-CSCF equipment obtains the session Handover Number STN-SR of SRVCC, and described STN-SR is sent to PCRF equipment, so that described PCRF equipment sends to MME by described STN-SR, store, thereby guarantee that by succinct method E-CSCF equipment EATF equipment E-CSCF equipment/EATF equipment equipment that E-CSCF equipment EATF equipment E-CSCF equipment/EATF equipment equipment that I-CSCF equipment is chosen and call setup are chosen is consistent.

With reference to Figure 19, Figure 19 is a kind of Proxy-Call Session Control Function P-CSCF equipment structure chart that the embodiment of the present invention provides.As shown in figure 19, described equipment comprises:

Acquiring unit 1901, for in the situation that receiving session establishment message, obtain the session Handover Number STN-SR of Single Radio Voice Call Continuity SRVCC, described session establishment message comprises the response message of session establishment request or session establishment request, and described STN-SR at least comprises the routing iinformation of Session Anchor equipment;

Transmitting element 1902, while being used for sending Qos control message to mobile management entity MME, in described Qos control message, carry described STN-SR, to notify described MME when UE initiates to switch, according to described STN-SR, to described Session Anchor equipment, send handover request.

Alternatively, described acquiring unit 1901, specifically for:

Concrete, the description with reference to figure 2, does not repeat them here.

Alternatively, described acquiring unit 1901, specifically for:

Concrete, the description with reference to figure 3, Fig. 4, Fig. 5, does not repeat them here.

Alternatively, described acquiring unit 1901, specifically for:

Alternatively, described acquiring unit, specifically for:

Concrete, the description with reference to figure 6, Fig. 7, Fig. 8, Fig. 9, does not repeat them here.

Alternatively, described acquiring unit, specifically for:

Concrete, the description with reference to figure 10-Figure 15, does not repeat them here.

The equipment that the embodiment of the present invention provides a kind of SRVCC to switch, in described equipment, P-CSCF equipment obtains the session Handover Number STN-SR of SRVCC, and described STN-SR is sent to PCRF equipment, so that described PCRF equipment sends to MME by described STN-SR, store, thereby guarantee that by succinct method E-CSCF equipment EATF equipment E-CSCF equipment/EATF equipment equipment that E-CSCF equipment EATF equipment E-CSCF equipment/EATF equipment equipment that I-CSCF equipment is chosen and call setup are chosen is consistent.

With reference to Figure 20, Figure 20 is the equipment structure chart of a kind of mobile management entity MME of providing of the embodiment of the present invention, and described MME comprises:

Receiving element 2001, the Qos control message sending for receiving P-CSCF equipment, carries STN-SR in described Qos control message;

Transmitting element 2002, for when UE initiates to switch, sends handover request according to described STN-SR to described Session Anchor equipment.

With reference to Figure 21, Figure 21 is a kind of system construction drawing of singly treating that the continuous SRVCC of voice switches.Described system comprises Proxy-Call Session Control Function P-CSCF equipment 2101 and mobile management entity MME 2102, wherein,

Described P-CSCF equipment 2101, for in the situation that receiving session establishment message, obtain the session Handover Number STN-SR of Single Radio Voice Call Continuity SRVCC, described session establishment message comprises the response message of session establishment request or session establishment request, and described STN-SR at least comprises the routing iinformation of Session Anchor equipment; While sending Qos control message to mobile management entity MME 2102, in described Qos control message, carry described STN-SR, to notify described MME2102 when UE initiates to switch, according to described STN-SR, to described Session Anchor equipment, send handover request.

Described MME2102, the Qos control message sending for receiving P-CSCF equipment 2101, carries STN-SR in described Qos control message; When UE initiates to switch, according to described STN-SR, to described Session Anchor equipment, send handover request.

The system that the embodiment of the present invention provides a kind of SRVCC to switch, in described system, P-CSCF equipment obtains the session Handover Number STN-SR of SRVCC, and described STN-SR is sent to PCRF equipment, so that described PCRF equipment sends to MME by described STN-SR, store, thereby guarantee that by succinct method E-CSCF equipment EATF equipment E-CSCF equipment/EATF equipment equipment that E-CSCF equipment EATF equipment E-CSCF equipment/EATF equipment equipment that I-CSCF equipment is chosen and call setup are chosen is consistent.

Figure 22 is the structural representation of a kind of P-CSCF of providing of the embodiment of the present invention.With reference to Figure 22, Figure 22 is a kind of equipment 2200 that the embodiment of the present invention provides, and the specific embodiment of the invention does not limit the specific implementation of described equipment.Described equipment 2200 comprises:

Processor (processor) 2201, communication interface (Communications Interface) 2202, memory (memory) 2203, bus 2204.

Processor 2201, communication interface 2202, memory 2203 completes mutual communication by bus 2204.

Communication interface 2202, for communicating with other equipment;

Processor 2201, for executive program.

Particularly, program can comprise program code, and described program code comprises computer-managed instruction.

Processor 2201 may be a central processing unit (central processing unit, CPU), or be configured to implement one or more integrated circuits of the embodiment of the present invention or specific integrated circuit ASIC(Application Specific Integrated Circuit).

Memory 2203, for storage program.Memory 2203 can be volatile memory (volatile memory), random access memory (random-access memory for example, RAM), or nonvolatile memory (non-volatile memory), for example read-only memory (ead-only memory, ROM), flash memory (flash memory), hard disk (hard disk drive, HDD) or solid state hard disc (solid-state drive, SSD).Processor 2201, according to the program command of memory 2203 storages, is carried out following methods:

When described P-CSCF equipment sends Qos control message to mobile management entity MME, in described Qos control message, carry described STN-SR, to notify described MME when UE initiates to switch, according to described STN-SR, to described Session Anchor equipment, send handover request.

Described P-CSCF equipment is when receiving session establishment message, and described P-CSCF equipment obtains the session Handover Number STN-SR of SRVCC, comprising:

Wherein, it should be noted that, the MME2102 in Figure 21 also can have and the structure that in Figure 22, P-CSCF equipment is identical, during the program command stored in the processor execute store in MME2102, can be achieved as follows method:

Receive the Qos control message that P-CSCF equipment sends, in described Qos control message, carry STN-SR; When user equipment (UE) initiates to switch, according to described STN-SR, to Session Anchor equipment, send handover request.

The above; be only the present invention's embodiment preferably, but protection scope of the present invention is not limited to this, is anyly familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.

Claims

1. the method that Single Radio Voice Call Continuity SRVCC switches, is characterized in that, described method comprises:

When described P-CSCF equipment sends Qos control message to mobile management entity MME, in described Qos control message, carry described STN-SR, to notify described MME when user equipment (UE) initiates to switch, according to described STN-SR, to described Session Anchor equipment, send handover request.

2. method according to claim 1, is characterized in that, described P-CSCF equipment is when receiving session establishment message, and described P-CSCF equipment obtains the session Handover Number STN-SR of SRVCC, comprising:

Described P-CSCF equipment is set up request in the situation that receive the emergency call session of described UE transmission, sets up one or more generations STN-SR in the following information of carrying in request according to described emergency call session:

3. method according to claim 1, is characterized in that, described P-CSCF equipment is when receiving session establishment message, and described P-CSCF equipment obtains the session Handover Number STN-SR of SRVCC, comprising:

Described P-CSCF equipment is set up request in the situation that receive the emergency call session that described UE sends, and according to one or more in pre-stored following information, generates STN-SR:

4. method according to claim 1, is characterized in that, described P-CSCF equipment is when receiving session establishment message, and described P-CSCF equipment obtains the session Handover Number STN-SR of SRVCC, comprising:

When described P-CSCF equipment is set up request in the emergency call session that receives described UE transmission, to described Session Anchor equipment, send described emergency call session and set up request;

5. method according to claim 1, is characterized in that, described P-CSCF equipment is when receiving session establishment message, and described P-CSCF equipment obtains the session Handover Number STN-SR of SRVCC, comprising:

Described P-CSCF equipment is in the situation that receive the urgent call call-back session establishment request that described Session Anchor equipment sends, and according to one or more in the following information of carrying in the request of described urgent call call-back session establishment, generates described STN-SR;

6. method according to claim 1, is characterized in that, described P-CSCF equipment is when receiving session establishment message, and described P-CSCF equipment obtains the session Handover Number STN-SR of SRVCC, comprising:

7. method according to claim 1, is characterized in that, described P-CSCF equipment is when receiving session establishment message, and described P-CSCF equipment obtains the session Handover Number STN-SR of SRVCC, comprising:

Described P-CSCF equipment is in the situation that receive the urgent call call-back session establishment request that described Session Anchor equipment sends, STN-SR described in the urgent call call-back session establishment acquisition request sending according to described Session Anchor equipment.

8. method according to claim 1, is characterized in that, described P-CSCF equipment is when receiving session establishment message, and described P-CSCF equipment obtains the session Handover Number STN-SR of SRVCC, comprising:

Described P-CSCF equipment is in the situation that receive the ordinary call session establishment request that described Session Anchor equipment sends, and according to one or more in following information, generates described STN-SR;

9. method according to claim 1, is characterized in that, described P-CSCF equipment is when receiving session establishment message, and described P-CSCF equipment obtains the session Handover Number STN-SR of SRVCC, comprising:

Described P-CSCF equipment is in the situation that receive the ordinary call session establishment request that UE sends, and according to one or more in following information, generates described STN-SR:

10. method according to claim 1, is characterized in that, described P-CSCF equipment is when receiving session establishment message, and described P-CSCF equipment obtains the session Handover Number STN-SR of SRVCC, comprising:

11. methods according to claim 1, is characterized in that, described P-CSCF equipment is when receiving session establishment message, and described P-CSCF equipment obtains the session Handover Number STN-SR of SRVCC, comprising:

Described P-CSCF equipment in the situation that receive the ordinary call session establishment request that described Session Anchor equipment sends, sends the request of described ordinary call session establishment to described UE, in the request of described ordinary call session establishment, carries STN-SR;

12. 1 kinds of methods that Single Radio Voice Call Continuity SRVCC switches, is characterized in that, described method comprises:

The Qos control message that mobile management entity MME Receiving Agent-CSCF P-CSCF equipment sends, carries STN-SR in described Qos control message;

When described MME initiates to switch at user equipment (UE), according to described STN-SR, to Session Anchor equipment, send handover request.

13. 1 kinds of Proxy-Call Session Control Function P-CSCF equipment, is characterized in that, described equipment comprises:

Transmitting element, while being used for sending Qos control message to mobile management entity MME, in described Qos control message, carry described STN-SR, to notify described MME when user equipment (UE) initiates to switch, according to described STN-SR, to described Session Anchor equipment, send handover request.

14. P-CSCF equipment according to claim 13, is characterized in that, described acquiring unit, specifically for:

In the situation that receive the emergency call session foundation request that described UE sends, one or more in the following information of carrying in asking according to described emergency call session foundation generate STN-SR:

15. P-CSCF equipment according to claim 13, is characterized in that, described acquiring unit, specifically for:

In the situation that receive the emergency call session that described UE sends, set up request, according to one or more in pre-stored following information, generate STN-SR:

16. P-CSCF equipment according to claim 13, is characterized in that, described acquiring unit, specifically for:

When the emergency call session that receives described UE transmission is set up request, to described Session Anchor equipment, send described emergency call session and set up request;

17. P-CSCF equipment according to claim 13, is characterized in that, described acquiring unit, specifically for:

18. P-CSCF equipment according to claim 13, is characterized in that, described acquiring unit, specifically for:

19. P-CSCF equipment according to claim 13, is characterized in that, described acquiring unit, specifically for:

In the situation that receive the urgent call call-back session establishment request that described Session Anchor equipment sends, according to STN-SR described in the urgent call call-back session establishment acquisition request of described Session Anchor equipment transmission.

20. P-CSCF equipment according to claim 13, is characterized in that, described acquiring unit, specifically for:

21. P-CSCF equipment according to claim 13, is characterized in that, described acquiring unit, specifically for:

22. P-CSCF equipment according to claim 13, is characterized in that, described acquiring unit, specifically for:

23. P-CSCF equipment according to claim 13, is characterized in that, described acquiring unit, specifically for:

24. 1 kinds of mobile management entity MME, is characterized in that, described MME comprises:

Receiving element, the Qos control message sending for Receiving Agent-CSCF P-CSCF equipment, carries STN-SR in described Qos control message;

Transmitting element, for when UE initiates to switch, sends handover request according to described STN-SR to Session Anchor equipment.

25. 1 kinds of systems of singly treating that the continuous SRVCC of voice switches, is characterized in that, described system comprises Proxy-Call Session Control Function P-CSCF equipment and mobile management entity MME, wherein,

Described P-CSCF equipment, for in the situation that receiving session establishment message, obtain the session Handover Number STN-SR of Single Radio Voice Call Continuity SRVCC, described session establishment message comprises the response message of session establishment request or session establishment request, and described STN-SR at least comprises the routing iinformation of Session Anchor equipment; While sending Qos control message to described MME, in described Qos control message, carry described STN-SR, to notify described MME when UE initiates to switch, according to described STN-SR, to described Session Anchor equipment, send handover request.

Described MME, the Qos control message sending for receiving described P-CSCF equipment, carries STN-SR in described Qos control message; When UE initiates to switch, according to described STN-SR, to described Session Anchor equipment, send handover request.