CN102769880A - Method and system for switching single ratio voice call continuity (SRVCC) domain - Google Patents
Method and system for switching single ratio voice call continuity (SRVCC) domain Download PDFInfo
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- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
- H04W36/00224—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB]
- H04W36/00226—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB] wherein the core network technologies comprise IP multimedia system [IMS], e.g. single radio voice call continuity [SRVCC]
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Abstract
The invention discloses a switching method of a single ratio voice call continuity (SRVCC) domain. According to the switching method, the functions of ATCF (access transfer control function) are realized by using an application server (AS), and the functions of ATGW (access transfer gateway) are realized by using a multimedia resource function processor (MRFP). The method comprises the following steps of after a domain switching request of SRVCC user equipment (UE), which is anchored to the AS and the MRFP, is received by the AS, carrying out media resource consultation of the UE and an opposite end UE of the UE to finish domain switching. The invention simultaneously discloses a switching system of the SRVCC domain for realizing the method. According to the invention, the modification to a current protocol is smaller, so that the investment of the existing network system is not only protected, but also the maintenance to the network system is convenient, and the cost of enhancing the switching implementation of SRVCC domain is saved.
Description
Technical field
The present invention relates to a kind of handoff technique, relate in particular to the changing method and the system in a kind of single wireless continuous voice call (SRVCC, Single Radio Voice Call Continuity) territory based on the territory.
Background technology
Internet protocol multimedia subsystem (IMS, IP Multimedia Subsystem) is the developing direction of following multimedia communication, also is the of paramount importance part of next generation network.It is third generation partner program (3GPP; The subsystem of the support IP multimedia service that Third Generation Partnership Project) proposes; Its notable feature is to have adopted session initiation protocol (SIP; Session Initial Protocol) system; Communication is irrelevant with access way, and possess that multiple multimedia service controlled function is separated with bearing capacity, calling separates with session, application separates with service, business and network detach, and multiple abilities such as mobile network and internet service fusion.
Single wireless continuous voice call (SRVCC, Single Radio Voice Call Continuity) has been realized the wireless user under the environment of Single Radio, and the voice between IMS and the circuit commutative field (CS, Circuit Switching) switch.That SRVCC is primarily aimed at is the UE of Single Radio; Be Radio, the Long Term Evolution (LTE that UE can only use 2G/3G at one time; Long Term Evolution) a kind of among the Radio of network; The demand of Single Radio is that manufacturer terminal proposes, and its objective is the radio frequency and the interlock circuit of multiplexing 2G/3G, LTE network.
SRVCC has brought ins and outs because of Single Radio: the switching between the Radio is very fast, but before switching, need set up by the network side passage that CS is relevant, and far-end is upgraded.
The switching of SRVCC on flow scheme design, need be carried out the passage of CS earlier and create and far-end renewal (Remote Update), carries out the switching (PS to CS Handover) of packet-switched domain to circuit commutative field afterwards; Under roaming condition, Remote Update is consuming time to be second level.
Under the high-speed mobile, user's PS is correlated with, and Radio (like LTE Radio) is quick to decay, maybe be before PS to CS Handover instruction be sent, and the relevant Radio of PS is complete attenuation, and this will cause accomplishing switching.
Generally speaking, the Remote Update of second level also can cause certain Media Clip, causes user experience not good (if surpass 200ms, the user has perception).
The notion that 3GPP has proposed to strengthen SRVCC is solving the above-mentioned reduction scheme of switching time, and is concrete:
Introduce and insert the side media anchor point, reduce the signaling transmission time of Remote Update.Introduce new access side anchor fixed point ATCF and ATGW; Calling is anchored into ATCF, reduces to switch distance, reduces switching time.
Fig. 1 strengthens the structural representation that the related network elements that relates to is switched in the SRVCC territory for 3GPP, and is as shown in Figure 1, strengthens in the structure of switching the related network elements that relates in the SRVCC territory at 3GPP, introduced access side anchor fix a point new function network element ATCF and ATGW; Basic call and switching road, territory processing procedure are before switched in the territory that following brief account is introduced behind ATCF and the ATGW.
Basic call processing procedure before switch in the territory is specific as follows:
UE initiates or receipt of call in the PS territory, and is mutual through Gm and Proxy Call Session Control Function (P-CSCF, Proxy-Call Session Control Function);
P-CSCF is mutual through Mw/Mx interface and ATCF, and ATCF controls ATGW;
The UE medium are affiliated on ATCF and ATGW;
UE anchors on ATCF and the ATGW;
ATCF is mutual through Mw/Mx interface and service call conversation control function (S-CSCF, Serving-Call Session Control Function);
S-CSCF triggers business continuance application server (SCC AS, Service Centralization and Continuity Application Server) through initial filter criteria (IFC, Initial Filter Criteria).
The territory handoff process is specific as follows:
UE reports the wireless access signal to give evolved universal terrestrial radio access network (E-UTRAN, Evolved Universal Terrestrial Radio Access Network), and E-UTRAN triggers SRVCC handover to CS territory according to the wireless access signal deciding; Conversation shift number (STN-SR, Session Transfer Number Single-Radio) initiation session handover operation carries in mobile switching centre (MSC, Mobile Switching Center);
MSC initiates the initial INVITE session and handovers request to ATCF, and to carry Request-URI be STN-SR, the Session Description Protocol (SDP, Session Description Protocol) that WMG (MGW, Media Gateway) is supported;
Related local terminal of ATCF and far-end carry out media resource and consult, and accomplish the territory handoff procedure;
Behind the handover success of territory, P-CSCF discharges original UE and calls out on that road in PS territory.
Strengthen the SRVCC technology and have following problem:
Need to introduce new ATCF/ATGW network element, and if call out and will switch, need be anchored on ATGW, ATGW there is capacity requirement; Simultaneously, also need introduce protocol interface new between P-CSCF and the ATCF, bigger to existing network change influence.
Summary of the invention
In view of this; Main purpose of the present invention is to provide the changing method and the system in a kind of single wireless continuous voice call territory; Can strengthen the switching of SRVCC territory through existing network element is carried out the function extension realization; Since needn't the corresponding interface between the expansion network element be changed, therefore less to the change of existing protocol, to the necessary protection of existing network investment having carried out.
For achieving the above object, technical scheme of the present invention is achieved in that
The changing method in a kind of single wireless continuous voice call territory with the function of AS realization ATCF, is realized the function of ATGW with MRFP; Said method also comprises:
UE sends the territory handoff request to said AS after anchoring to AS and the last SRVCC of realization of MRFP business;
Said AS carries out the media resource of said UE and opposite end UE thereof to be consulted, and accomplishes the territory and switches.
Preferably, said method also comprises:
Said AS is in the UE of SRVCC registration process, for said UE distributes the SRVCC Handover Number.
Preferably, when said AS consulted at the media resource that carries out said UE and opposite end UE thereof, the media resource of transmitting said opposite end UE through Proxy Call Session Control Function P-CSCF upgraded request;
Perhaps, when said AS consults at the media resource that carries out said UE and opposite end UE thereof, directly send renewal request to said opposite end UE media resource.
Preferably, after switched in the completion territory, said method also comprised:
When said AS asks the media resource renewal of said opposite end UE through the P-CSCF forwarding, discharge the calling of said UE in packet switching PS territory by said P-CSCF;
When said AS directly sends the renewal request of said opposite end UE media resource, discharge the calling of said UE in packet switching PS territory by said AS.
Preferably, said AS is connected with crying between the conversation control function CSCF through the professional control of IMS ISC interface; Said AS controls said MRFP.
Preferably, said UE anchors on said AS and the said MRFP, for: the medium of the UE of said SRVCC are affiliated on said AS and said MRFP.
Preferably, said method also comprises:
Said territory handoff request is initiated by the moving exchanging center MSC in the residing circuit switching (CS) of said UE territory.
Preferably, said method also comprises:
Said UE reports the wireless access signal to evolved universal terrestrial radio access network E-UTRAN;
Said E-UTRAN switches to the CS territory according to the wireless access signal deciding triggering SRVCC of said UE;
Initiate the initial INVITE session by said MSC and handover request to said AS, shown in carry the SDP of Request-URI and WMG support in the initial INVITE session handoff request, wherein, said Request-URI is STN-SR.
Preferably, the function of said ATCF is specifically realized by the business continuance control application server SCC_AS in visit territory.
The switched system in a kind of single wireless continuous voice call territory with the function of AS realization ATCF, is realized the function of ATGW with MRFP; Wherein:
UE, be used for anchor on AS and the MRFP realize the SRVCC business after, send the territory handoff request to AS;
AS after being used to receive the territory handoff request of said UE, carries out the media resource of said UE and opposite end UE thereof and consults, and realizes the territory switching.
Preferably, AS is further used for, and when the media resource that carries out said UE and opposite end UE thereof was consulted, the media resource of transmitting said opposite end UE through P-CSCF upgraded request;
Perhaps, AS is further used for, and when the media resource that carries out said UE and opposite end UE thereof is consulted, directly sends the renewal request to said opposite end UE media resource.
Preferably, after switch in the completion territory,
When AS asks the media resource renewal of said opposite end UE through the P-CSCF forwarding, discharge the calling of said UE in packet switching PS territory by said P-CSCF;
When AS directly sends the renewal request of said opposite end UE media resource, discharge the calling of said UE in the PS territory by said AS.
Preferably, said territory handoff request is initiated by the MSC in the residing circuit switching (CS) of said UE territory.
Preferably, said UE is further used for, and reports the wireless access signal to E-UTRAN;
Said E-UTRAN is further used for, and triggers SRVCC according to the wireless access signal deciding of said UE and switches to the CS territory;
Initiate the initial INVITE session by said MSC and handover request to said AS, shown in carry the SDP of Request-URI and WMG support in the initial INVITE session handoff request, wherein, said Request-URI is STN-SR.
Among the present invention,, realize the function of ATGW with Multimedia resource function processor (MRFP) (MRFP, Multimedia Resource Function Processor) through realize the function of ATCF with the application server in the existing system (AS, Application Server); Like this; Because AS, MRFP are the existing network element in the current system; The interface that needn't after introducing ATCF, ATGW function, relate to the network element of introducing changes, and current agreement is changed must be also less, thereby not only the investment of existing network system is protected; And made things convenient for maintenance to network system, practiced thrift the cost that strengthens the switching enforcement of SRVCC territory.
Description of drawings
Fig. 1 strengthens the structural representation that the related network elements that relates to is switched in the SRVCC territory for 3GPP;
Fig. 2 switches the structural representation of the related network elements that relates to for a kind of SRVCC of enhancing of the present invention territory;
Fig. 3 switches the structural representation of the related network elements that relates to for the another kind of SRVCC of enhancing of the present invention territory;
Fig. 4 is the flow chart of the changing method embodiment one in single wireless continuous voice call of the present invention territory;
Fig. 5 is the flow chart of the changing method embodiment two in single wireless continuous voice call of the present invention territory.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, below lift embodiment and with reference to accompanying drawing, to further explain of the present invention.
Fig. 2 switches the structural representation of the related network elements that relates to for a kind of SRVCC of enhancing of the present invention territory; As shown in Figure 2; The present invention is through expanding network element AS in the existing network system and MRFP as inserting transfer controlled function (ATCF respectively; Access Transfer Control Function) gateway (ATGW, Access Transfer Gateway) function is shifted in function and access, realizes the switching of SRVCC territory.As shown in Figure 2, affixed one's name to AT_AS (as the AS of ATCF) and MRFP at the access sidepiece; Wherein, can also have Multimedia resource function controller (MRFC) (MRFC, Multimedia Resource Function Controller) between AT_AS and the MRFP, AT_AS is responsible for grappling and switching, and control MRFP.
Based on structure shown in Figure 2, the BCP basic call process before switch in the territory is roughly following:
UE initiates or receipt of call in the PS territory, carries out alternately through Gm and P-CSCF;
P-CSCF carries out alternately through ISC interface and AT_AS, and AT_AS controls MRFP;
The UE medium are affiliated on AT_AS and MRFP;
UE anchors on AT_AS and the MRFP;
AT_AS sends to P-CSCF with related news through ISC interface, or receives the related news that P-CSCF sends through ISC interface;
Follow-up call handling process is identical with the IMS basic call, and repeating no more here, it realizes details.
The territory handoff procedure is roughly following:
UE reports the wireless access signal to give E-UTRAN, and E-UTRAN triggers SRVCC handover to CS territory according to the wireless access signal deciding; MSC carries STN-SR initiation session handover operation;
MSC initiates the initial INVITE session and handovers request to AT_AS, and carries the SDP of request unified resource identifier (Request-URI, Request-Uniform Resource Identifier) and MGW support; Wherein, Request-URI is STN-SR.
Related local terminal of AT_AS and far-end carry out media resource and consult, and accomplish the territory handoff procedure.
Behind the handover success of territory, P-CSCF discharges original UE and calls out on that road in PS territory.
Fig. 3 is the structural representation that the related network elements that relates to is switched in a kind of SRVCC of enhancing of the present invention territory, and is as shown in Figure 3, and the present invention realizes the switching of SRVCC territory through network element AS in the existing network system and MRFP are expanded function and ATGW function as ATCF respectively.As shown in Figure 3, affixed one's name to AT_AS (as the AS of ATCF) and MRFP at the access sidepiece; Wherein, can also have MRFC between AT_AS and the MRFP, AT_AS is responsible for grappling and switching, and control MRFP.Compare with structure shown in Figure 2; Structure shown in Figure 3 is only had any different with structure shown in Figure 2 on the annexation of AT_AS and related network elements; Concrete; AT_AS is unlike shown in Figure 2, carry out alternately through P-CSCF and PS territory and home network, but directly and PS territory and home network carry out alternately.
UE initiates or receipt of call in the PS territory, carries out alternately through Gm and P-CSCF;
P-CSCF carries out alternately through ISC interface and AT_AS, and AT_AS controls MRFP;
The UE medium are affiliated on AT_AS and MRFP;
UE anchors on AT_AS and the MRFP;
AT_AS directly sends to P-CSCF or I/S-CSCF with related news, or directly receives related news through P-CSCF or I/S-CSCF;
Follow-up call handling process is identical with the IMS basic call, and repeating no more here, it realizes details.
The territory handoff procedure is roughly following:
UE reports the wireless access signal to give E-UTRAN, and E-UTRAN triggers SRVCC handover to CS territory according to the wireless access signal deciding; MSC carries STN-SR initiation session handover operation;
MSC initiates the initial INVITE session and handovers request to AT_AS, and carries the SDP of request unified resource identifier (Request-URI, Request-Uniform Resource Identifier) and MGW support; Wherein, Request-URI is STN-SR.
Related local terminal of AT_AS and far-end carry out media resource and consult, and accomplish the territory handoff procedure.
Behind the handover success of territory, AT_AS discharges original UE and calls out on that road in PS territory.
Among the present invention, AT_AS is in the UE of SRVCC registration process, for UE distributes the SRVCC Handover Number; Sign when the UE of SRVCC uses this SRVCC Handover Number to switch as the territory.The function of ATCF specifically realizes that by the SCC_AS in visit territory promptly, above-mentioned AT_AS is specifically realized by SCC_AS.In following embodiment, stress this point no longer specially.
Fig. 4 is the flow chart of the changing method embodiment one in single wireless continuous voice call of the present invention territory, and as shown in Figure 4, the changing method in single wireless continuous voice call of the present invention territory specifically may further comprise the steps:
UE_A reports the wireless access signal to give E-UTRAN, and decision triggers SRVCC handover to CS territory to E-UTRAN according to wireless access signal (for example current PS territory wireless signal is relatively poor, is not suitable for communication); MSC carries STN-SR initiation session handover operation;
Step 402, MSC initiates the initial INVITE session and handovers request to AT_AS&&MRFP, and carries the SDP that Request-URI and MGW support, and wherein, Request-URI is STN-SR;
Step 403, AT_AS&&MRFP carries out local terminal UE and far-end UE related, prepares far-end UE is upgraded operation;
Step 404, AT_AS&&MRFP sends REINVITE message and removes to upgrade far-end UE;
Step 405, P-CSCF transmits this REINVITE message and gives home domain IMS;
Step 406, home domain IMS sends and upgrades media resource message to terminal UE _ B;
Step 407, UE_B replys 200OK, and carries the terminal media ability of UE_B;
Step 408, home domain IMS transmitted response message are given visit territory P-CSCF;
Step 409, visit territory P-CSCF transmits 200OK and gives AT_AS&&MRFP;
Step 410, AT_AS&&MRFP is transmitted to MSC;
Step 411, MSC replys ACK;
Step 412, AT_AS&&MRFP transmits ACK to P-CSCF;
Step 413, P-CSCF transmits ACK message and gives home domain IMS;
Step 414, home domain IMS transmits ACK message to terminal UE _ B;
So far, completion is switched in the territory, and AT_AS&&MRFP discharges UE_A and calls out on that road in PS territory.
Fig. 5 is the flow chart of the changing method embodiment two in single wireless continuous voice call of the present invention territory, and as shown in Figure 5, the changing method in single wireless continuous voice call of the present invention territory specifically may further comprise the steps:
Step 501, SRVCC user UE_A carries SDP in the PS territory and initiates a call to UE_B, and UE_A has anchored to AT_AS; The calling and called user sets up conversation, gets into stable state;
UE_A reports the wireless access signal to give E-UTRAN, and E-UTRAN triggers SRVCC handover to CS territory according to the wireless access signal deciding; MSC carries STN-SR initiation session handover operation;
Step 502, MSC initiates the initial INVITE session and handovers request to AT_AS&&MRFP, and carries the SDP of Request-URI and MGW support, and wherein, Request-URI is STN-SR;
Step 503, AT_AS&&MRFP carries out local terminal UE and far-end UE related, prepares far-end UE is upgraded operation;
Step 504, AT_AS&&MRFP sends REINVITE message and removes to upgrade far-end UE; AT_AS&&MRFP directly sends updating message to home domain;
Step 505, home domain IMS sends and upgrades media resource message to terminal UE _ B;
Step 506, UE_B replys 200OK, and the media capability of carried terminal UE_B;
Step 507, home domain IMS transmitted response message is given AT_AS&&MRFP;
Step 508, AT_AS&&MRFP is transmitted to MSC;
Step 510, AT_AS&&MRFP transmits ACK home domain IMS;
Step 511, home domain IMS transmits ACK message to terminal UE _ B;
So far, completion is switched in the territory, and AT_AS&&MRFP discharges UE_A and calls out on that road in PS territory.
The present invention discloses the switched system in a kind of single wireless continuous voice call territory,, realize the function of ATGW with MRFP with the function of AS realization ATCF; Wherein,
AS is used for after the territory handoff request that receives the UE that anchors to the SRVCC on said AS and the said MRFP, carries out the media resource of said UE and opposite end UE thereof and consults, and realizes the territory switching.
The switched system in single wireless continuous voice call of the present invention territory, concrete structure can consult earlier figures 2 and structure shown in Figure 3 is understood.On the network hardware in the existing network system, the present invention does not make amendment, but the function of wherein related network elements has been carried out expansion.
Wherein, AS is further used for, and when the media resource that carries out said UE and opposite end UE thereof was consulted, the media resource of transmitting said opposite end UE through P-CSCF upgraded request;
Perhaps, AS is further used for, and when the media resource that carries out said UE and opposite end UE thereof is consulted, directly sends the renewal request to said opposite end UE media resource.
Wherein, after switch in the completion territory,
When AS asks the media resource renewal of said opposite end UE through the P-CSCF forwarding, discharge the calling of said UE in packet switching PS territory by said P-CSCF;
When AS directly sends the renewal request of said opposite end UE media resource, discharge the calling of said UE in packet switching PS territory by said AS.
Wherein, said territory handoff request is initiated by the moving exchanging center MSC in the residing circuit switching (CS) of said UE territory.
Concrete, said UE is further used for, and reports the wireless access signal to E-UTRAN;
Said E-UTRAN is further used for, and triggers SRVCC according to the wireless access signal deciding of said UE and switches to the CS territory;
Initiate the initial INVITE session by said MSC and handover request to said AS, shown in carry the Session Description Protocol SDP of Request-URI and WMG support in the initial INVITE session handoff request, wherein, said Request-URI is STN-SR.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.
Claims (14)
1. the changing method in a single wireless continuous voice call territory is characterized in that, said method comprises:
User equipment (UE) sends the territory handoff request to said AS after anchoring to application server AS and the last realization of Multimedia resource function processor (MRFP) MRFP single wireless continuous voice call SRVCC business;
Said AS carries out the media resource of said UE and opposite end UE thereof to be consulted, and accomplishes the territory and switches.
2. method according to claim 1 is characterized in that, said method also comprises:
Said AS is in the UE of SRVCC registration process, for said UE distributes the SRVCC Handover Number.
3. method according to claim 1 is characterized in that, when said AS consulted at the media resource that carries out said UE and opposite end UE thereof, the media resource of transmitting said opposite end UE through Proxy Call Session Control Function P-CSCF upgraded request;
Perhaps, when said AS consults at the media resource that carries out said UE and opposite end UE thereof, directly send renewal request to said opposite end UE media resource.
4. method according to claim 3 is characterized in that, after switched in the completion territory, said method also comprised:
When said AS asks the media resource renewal of said opposite end UE through the P-CSCF forwarding, discharge the calling of said UE in packet switching PS territory by said P-CSCF;
When said AS directly sends the renewal request of said opposite end UE media resource, discharge the calling of said UE in packet switching PS territory by said AS.
5. method according to claim 1 is characterized in that, said AS is connected with crying between the conversation control function CSCF through the professional control of IMS ISC interface; Said AS controls said MRFP.
6. method according to claim 1 is characterized in that, said UE anchors on said AS and the said MRFP, for: the medium of the UE of said SRVCC are affiliated on said AS and said MRFP.
7. method according to claim 1 is characterized in that, said method also comprises:
Said territory handoff request is initiated by the moving exchanging center MSC in the residing circuit switching (CS) of said UE territory.
8. method according to claim 7 is characterized in that, said method also comprises:
Said UE reports the wireless access signal to evolved universal terrestrial radio access network E-UTRAN;
Said E-UTRAN switches to the CS territory according to the wireless access signal deciding triggering SRVCC of said UE;
Initiate the initial INVITE session by said MSC and handover request to said AS, shown in carry the SDP of Request-URI and WMG support in the initial INVITE session handoff request, wherein, said Request-URI is STN-SR.
9. according to each described method of claim 1 to 8, it is characterized in that the function of said ATCF is specifically realized by the business continuance control application server SCC_AS in visit territory.
10. the switched system in a single wireless continuous voice call territory is characterized in that, with the function of AS realization ATCF, realizes the function of ATGW with MRFP; Wherein:
UE, be used for anchor on AS and the MRFP realize the SRVCC business after, send the territory handoff request to AS;
AS after being used to receive the territory handoff request of said UE, carries out the media resource of said UE and opposite end UE thereof and consults, and realizes the territory switching.
11. system according to claim 10 is characterized in that AS is further used for, when the media resource that carries out said UE and opposite end UE thereof was consulted, the media resource of transmitting said opposite end UE through P-CSCF upgraded request;
Perhaps, AS is further used for, and when the media resource that carries out said UE and opposite end UE thereof is consulted, directly sends the renewal request to said opposite end UE media resource.
12. system according to claim 11 is characterized in that, after switch in the completion territory,
When AS asks the media resource renewal of said opposite end UE through the P-CSCF forwarding, discharge the calling of said UE in packet switching PS territory by said P-CSCF;
When AS directly sends the renewal request of said opposite end UE media resource, discharge the calling of said UE in the PS territory by said AS.
13. system according to claim 10 is characterized in that, said territory handoff request is initiated by the MSC in the residing circuit switching (CS) of said UE territory.
14. system according to claim 13 is characterized in that,
Said UE is further used for, and reports the wireless access signal to E-UTRAN;
Said E-UTRAN is further used for, and triggers SRVCC according to the wireless access signal deciding of said UE and switches to the CS territory;
Initiate the initial INVITE session by said MSC and handover request to said AS, shown in carry the SDP of Request-URI and WMG support in the initial INVITE session handoff request, wherein, said Request-URI is STN-SR.
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| CN201110114267.XA CN102769880B (en) | 2011-05-04 | 2011-05-04 | The changing method and system in single wireless voice calling continuity domain |
| PCT/CN2012/074315 WO2012149866A1 (en) | 2011-05-04 | 2012-04-18 | Method and system for single radio voice call continuity domain handover |
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| CN201110114267.XA CN102769880B (en) | 2011-05-04 | 2011-05-04 | The changing method and system in single wireless voice calling continuity domain |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015127756A1 (en) * | 2014-02-28 | 2015-09-03 | 中兴通讯股份有限公司 | Method and device for anchoring media in voice call continuity service |
| CN107635217A (en) * | 2016-07-18 | 2018-01-26 | 中兴通讯股份有限公司 | A kind of improved eSRVCC switching methods and device |
| WO2018099155A1 (en) * | 2016-12-02 | 2018-06-07 | 中兴通讯股份有限公司 | Service processing method, device and system |
| CN110225558A (en) * | 2018-03-02 | 2019-09-10 | 中国移动通信集团设计院有限公司 | Trans-regional call handling method, MME, HSS and eMSC |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9826072B1 (en) * | 2016-09-29 | 2017-11-21 | T-Mobile Usa, Inc. | Network-terminal interoperation using compatible payloads |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101227677B (en) * | 2008-02-05 | 2011-06-22 | 中兴通讯股份有限公司 | Single wireless channel voice business continuity field switching method |
| CN101459891B (en) * | 2008-03-25 | 2011-03-16 | 中兴通讯股份有限公司 | Switching method for single wireless channel voice service continuity |
| CN101594647B (en) * | 2008-05-28 | 2011-11-02 | 华为技术有限公司 | Method for switching SR VCC service and apparatus thereof |
| CN101854686A (en) * | 2009-03-30 | 2010-10-06 | 上海贝尔股份有限公司 | Method and equipment for reducing interruption time for switching voice over internet phone (VoIP) calling |
| JP5694348B2 (en) * | 2009-11-10 | 2015-04-01 | テレフオンアクチーボラゲット エル エム エリクソン（パブル） | Optimization of handover delay |
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2011
- 2011-05-04 CN CN201110114267.XA patent/CN102769880B/en not_active Expired - Fee Related
-
2012
- 2012-04-18 WO PCT/CN2012/074315 patent/WO2012149866A1/en active Application Filing
Non-Patent Citations (1)
| Title |
|---|
| 许幕鸿: "SRVCC增强技术分析", 《电信网技术》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015127756A1 (en) * | 2014-02-28 | 2015-09-03 | 中兴通讯股份有限公司 | Method and device for anchoring media in voice call continuity service |
| CN107635217A (en) * | 2016-07-18 | 2018-01-26 | 中兴通讯股份有限公司 | A kind of improved eSRVCC switching methods and device |
| CN107635217B (en) * | 2016-07-18 | 2021-04-20 | 中兴通讯股份有限公司 | Improved eSRVCC switching implementation method and device |
| WO2018099155A1 (en) * | 2016-12-02 | 2018-06-07 | 中兴通讯股份有限公司 | Service processing method, device and system |
| CN108156634A (en) * | 2016-12-02 | 2018-06-12 | 中兴通讯股份有限公司 | Method for processing business, apparatus and system |
| CN108156634B (en) * | 2016-12-02 | 2022-08-19 | 中兴通讯股份有限公司 | Service processing method, device and system |
| CN110225558A (en) * | 2018-03-02 | 2019-09-10 | 中国移动通信集团设计院有限公司 | Trans-regional call handling method, MME, HSS and eMSC |
| CN110225558B (en) * | 2018-03-02 | 2021-07-09 | 中国移动通信集团设计院有限公司 | Cross-region call processing method, MME, HSS and eMSC |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012149866A1 (en) | 2012-11-08 |
| CN102769880B (en) | 2017-04-05 |
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