CN102802222B - The acquisition methods and system of a kind of E SRVCC STN SR - Google Patents
The acquisition methods and system of a kind of E SRVCC STN SR Download PDFInfo
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- CN102802222B CN102802222B CN201110142022.8A CN201110142022A CN102802222B CN 102802222 B CN102802222 B CN 102802222B CN 201110142022 A CN201110142022 A CN 201110142022A CN 102802222 B CN102802222 B CN 102802222B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/15—Setup of multiple wireless link connections
- H04W76/16—Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer
Abstract
The invention discloses the acquisition methods and system of a kind of E SRVCC STN SR, including：In the home subscriber server (HSS) that dynamic single wireless voice calling continuity session Handover Number (STN SR) storage that access switching control function (ATCF) in visit domain will be distributed for user is arrived in visit domain；Dynamic STN SR are obtained from HSS.By the network element device present invention, avoiding not same area using the equipment of different manufacturers, the problem that cannot be realized is switched caused by the devices from different manufacturers of generation is incompatible.
Description
Technical field
The present invention relates to communication technique field, the acquisition methods and system of a kind of E-SRVCC STN-SR are particularly related to.
Background technology
Internet protocol multimedia subsystem (IMS, IP Multimedia Subsystem) is the hair of Future Multimedia communication
Exhibition direction, is also the mostly important part of next generation network.It is third generation partner program (3GPP, Third
Generation Partnership Project) propose support IP multimedia service subsystem, it is noteworthy characterized by adopts
With session initiation protocol (SIP, Session Initial Protocol) system, communicate unrelated with access way, can have
Standby various multimedia service control functions separate with bearing capacity, call separated with session, separated using with service, business and net
Network is separated and mobile network such as merges at the multi abilities with internet service.
Single wireless voice calling continuity (SRVCC, Single Radio Voice Call Continuity) is realized
Wireless user in the environment of single wireless signal (Single Radio), in IMS and circuit switching (CS, circuit
Switching the voice switching between).UE under SRVCC correspondence Single Radio environment, i.e. UE can only make in the same time
With the one kind in wireless signal (Radio), the Radio of LTE of 2G or 3G (2G/3G).SRVCC sessions Handover Number (STN-SR,
Session Transfer Number for SRVCC) demand be manufacturer terminal propose, the purpose is to be multiplexed 2G/3G,
The radio frequency and interlock circuit of LTE network；STN-SR static configurations are in mobile management entity (MME), or looked into from outside by MME
Ask.
The special property that SRVCC brings because of Single Radio includes：Switching between Radio quickly, but
, it is necessary to the related network side Path Setups of CS is good before switching, and distal end is updated.
SRVCC's is switched in flow scheme design, and the passage for first carrying out CS is created and distal end renewal (Remote Update),
Carry out being packet-switching to the switching (PS to CS Handover) of circuit switching afterwards；Wherein, in roaming situations, Remote
It is second level that Update takes.
Under high-speed mobile scene, PS correlations Radio (such as LTE Radio) rapid decay of user may be in PS to
CS Handover instructions send preceding PS correlations Radio complete attenuations, then will be unable to complete SRVCC switchings.
Generally, the Remote Update of second level will also result in certain Media Clip, cause Consumer's Experience not
Good (such as, more than 200ms, user can just perceive).
Therefore, 3GPP proposes the concept of E-SRVCC to solve the scheme of above-mentioned reduction switching time：Introduce and access side matchmaker
Body anchor point, reduces the signaling transmission time of Remote Update.Introduce new access side anchor point and access switching control function
(ATCF, Access Transfer Control Functionality) and access switching gateway (ATGW, Access
Transfer Gateway), as shown in figure 1, wherein * is represented being determined based on ATCF and ATGW by deployment and allocation plan, * *
Represent that Mw/I2 interfaces depend on enhanced mobile switching centre (E-MSC) ability.User's call anchoring is to ATCF, it is possible to reduce
Switching distance, reduction switching time.Because ATCF is present in visited place, it is impossible to STN-SR is made into quiet as in SRVCC schemes
State configuration (PSI of similar home domain SCC_AS), so E-SRVCC schemes propose a kind of acquisition modes of new STN-SR, such as
Shown in Fig. 2, including：
Step 1, ATCF (being located at visit domain) receives the registration message of user, for the user for accessing the visit domain distributes dynamic
State STN-SR, and STN-SR is sent to S-CSCF by registration message by user；
Step 2, S-CSCF returns to 401 message to UE, carries registration challenge information.
Step 3, user initiates registration message again, carries authentication information.
Step 4, after S-CSCF receives the registration message that user initiates again, returns to 200OK responses, register really
Recognize.
Step 5, after accreditation verification, S-CSCF sends the third party registration messages of user to the SCC_AS of home domain, carries
Corresponding dynamic STN-SR；
Step 6, SCC_AS returns to 200OK and responds to S-CSCF.
Step 7, SCC_AS by Sh interface by the dynamic STN-SR of the user store to home subscriber server (HSS,
Home Subscriber Server)；
The dynamic STN-SR is pushed to MME by step 8, HSS.
When there is E-SRVCC switchings, MME triggers MSC and initiates handover call request using corresponding dynamic STN-SR, and
Handover call request is sent to the ATCF of the former calling of grappling and media according to dynamic STN-SR.
In the process, it is related to two cooperations in domain of visited place IMS and ownership place IMS, is related to the enhancing of more network element, and
And need HSS to support the push of corresponding dynamic STN-SR, and in actual deployment application, the network element device of same area is not used typically
The equipment of different manufacturers, switching cannot be realized caused by so easily producing devices from different manufacturers incompatible.
The content of the invention
In view of this, it is a primary object of the present invention to provide the acquisition methods and system of a kind of E-SRVCC STN-SR,
To solve the problems, such as to be realized due to the incompatible caused switching of devices from different manufacturers.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
The invention provides a kind of acquisition methods of E-SRVCC STN-SR, the method includes：
The dynamic single wireless audio call that access switching control function ATCF in visit domain will be distributed for user is continuous
Property session Handover Number STN-SR storage in the home subscriber server HSS in visit domain；
The dynamic STN-SR is obtained from the HSS.
Wherein, the method also includes：Extend the data-interface between the ATCF and the HSS.
The dynamic STN-SR that ATCF in the visit domain will be distributed for user is stored in the HSS in visit domain, including：
It is user distribution dynamic STN-SR after the ATCF receives the 200OK responses of the accreditation verification of home domain return,
And the dynamic STN-SR is stored in the HSS by the data-interface for extending.
The dynamic STN-SR is obtained from the HSS, including：
The mobile management entity MME triggering inquiry HSS, obtains the dynamic STN-SR, and initiate enhanced single nothing
Line continuous voice call E-SRVCC switches；
The MME sends packet switch PS to circuit switching (CS) to the enhanced mobile switching centre E-MSC in visit domain
Handover request message, and carry the dynamic STN-SR；
The E-MSC initiates calling using the dynamic STN-SR, and call request is routed to the distribution dynamic STN-
The ATCF of SR.
The dynamic STN-SR is obtained from the HSS, including：
MME initiates E-SRVCC switchings；
The MME sends the handover request message of PS to CS to the E-MSC in visit domain, and carries the corresponding static state of user
STN-SR；
It is determined that when visit domain provides E-SRVCC functions, the E-MSC is according to the static STN-SR triggerings inquiry
HSS, obtains the dynamic STN-SR, and the static STN-SR is revised as into the dynamic STN-SR；
The E-MSC initiates calling using the dynamic STN-SR, and call request is routed to the distribution dynamic STN-
The ATCF of SR.
The E-MSC obtains the dynamic STN-SR according to the static STN-SR triggering inquiry HSS, and by institute
State static STN-SR and be revised as the dynamic STN-SR, including：
The E-MSC is according to the STN-SR service control functions SCF in the static STN-SR triggerings visit domain；
The STN-SR SCF inquire about the HSS, obtain the dynamic STN-SR, and the static STN-SR is revised as
After the dynamic STN-SR, the E-MSC is notified.
Present invention also offers a kind of acquisition system of E-SRVCC STN-SR, including ATCF, HSS in visit domain
With acquisition network element；Wherein,
The ATCF, for distributing dynamic STN-SR for user, and stores in the HSS；
The HSS, for storing the dynamic STN-SR；
The acquisition network element, for obtaining the dynamic STN-SR from the HSS.
Wherein, the system also includes managed network element, for extending the data-interface between the ATCF and the HSS.
The ATCF, is user's distribution dynamic after the 200OK responses of the accreditation verification for being additionally operable to receive home domain return
STN-SR, and the dynamic STN-SR is stored in the HSS by the data-interface for extending.
The acquisition network element includes MME and E-MSC；
The MME, for triggering the inquiry HSS, obtains the dynamic STN-SR, and initiate E-SRVCC switchings；
The E-MSC, the handover request that PS to the CS sent after the dynamic STN-SR is obtained for receiving the MME disappears
Breath, carries the dynamic STN-SR in the handover request message；It is also used for the dynamic STN-SR and initiates calling.
The acquisition network element includes MME and E-MSC；
The MME, for initiating E-SRVCC switchings；It is additionally operable to be sent to the E-MSC and carries the corresponding static state of user
The handover request message of PS to the CS of STN-SR；
The E-MSC, the handover request message for receiving PS to the CS；It is additionally operable to it is determined that visit domain provides E-
During SRVCC functions, according to the static STN-SR triggering inquiry HSS, the dynamic STN-SR is obtained, and by the static state
STN-SR is revised as the dynamic STN-SR；It is also used for the dynamic STN-SR and initiates calling.
The acquisition network element also includes STN-SR SCF, for when domain offer E-SRVCC functions are visited, by the E-
MSC obtains the dynamic STN-SR, and the static STN-SR is repaiied according to the static STN-SR triggerings inquiry HSS
After being changed to the dynamic STN-SR, the E-MSC is notified.
The acquisition methods and system of E-SRVCC STN-SR of the present invention, by the number in visit domain between ATCF and HSS
It is extended according to interface, the dynamic STN-SR that making visit domain ATCF will directly distribute is stored in the HSS in visit domain, and MME can
Dynamic STN-SR directly is obtained in HSS from visit domain, in this way, the acquisition of STN-SR is just unrelated with home domain HSS, home domain
HSS need not carry out information pushing, reduce to the home domain particularly requirement of HSS；It is related in method proposed by the present invention
The network elements such as ATCF, HSS, MME are respectively positioned in a domain, therefore, it is to avoid not network element device the setting using different manufacturers of same area
It is standby, the problem that switching cannot be realized caused by the devices from different manufacturers of generation is incompatible.
Brief description of the drawings
Fig. 1 is existing E-SRVCC solutions schematic diagram；
Fig. 2 is that existing E-SRVCC STN-SR obtain schematic flow sheet；
Fig. 3 is that E-SRVCC STN-SR of the present invention obtain the schematic diagram of scheme one；
Fig. 4 is that E-SRVCC STN-SR of the present invention obtain the schematic diagram of scheme two；
Fig. 5 is E-SRVCC STN-SR allocation flow schematic diagrames of the present invention；
Fig. 6 is the E-SRVCC STN-SR acquisition methods schematic flow sheets of the embodiment of the present invention one；
Fig. 7 is the E-SRVCC STN-SR acquisition methods schematic flow sheets of the embodiment of the present invention two；
Fig. 8 is the structural representation that E-SRVCC STN-SR of the present invention obtain system embodiment one；
Fig. 9 is the structural representation that E-SRVCC STN-SR of the present invention obtain system embodiment two.
Specific embodiment
The basic thought of the acquisition methods of E-SRVCC STN-SR of the present invention is：The dynamic that visit domain ATCF will directly be distributed
STN-SR is stored in the HSS in visit domain, dynamic STN-SR is obtained from the HSS, and initiate E-SRVCC switchings.In this way,
The acquisition of STN-SR is just unrelated with home domain HSS, and home domain HSS need not carry out information pushing, reduce and home domain is particularly
The requirement of HSS.
Data-interface in present invention extension visit domain between ATCF and HSS, using the interface mode of similar Sh；For
For HSS, the data-interface of the extension is similar to Sh interface, it is contemplated that ATCF behaviors are not typical AS behaviors, because
This, Sh ' interfaces are named as in the present invention by the interface.HSS is arrived in the dynamic STN-SR storages that so achieving that ATCF will distribute
In.
It is user distribution dynamic STN-SR after ATCF receives the 200OK responses of the accreditation verification of home domain return, and will
Dynamic STN-SR is stored in HSS by the data-interface for extending.It is pointed out that ATCF will dynamic by Sh ' interfaces
STN-SR is stored in HSS, not by registration message, but is stored dynamic STN-SR as transparent data storage,
Requirement is not parsed to HSS.
Sided access network element obtains dynamic STN-SR from the HSS in visit domain：
A kind of mode is：MME triggering inquiry HSS, obtain dynamic STN-SR, and initiate E-SRVCC switch (switching according to
Dynamic STN-SR is initiated)；Then, MME initiates the handover request of PS to CS using the dynamic STN-SR, and E-MSC uses the dynamic
STN-SR initiates calling, as shown in figure 3, because the HSS is located at visit domain, a domain is located at MME, therefore in the absence of dynamic
The requirement that STN-SR is pushed.
The mode that another kind compares optimization is：MME first initiates E-SRVCC switchings, and (switching is sent out according to static STN-SR
Rise)；Then, MME initiates the handover request of PS to CS using static state STN-SR；Because visit domain provides E-SRVCC functions, E-
MSC obtains dynamic STN-SR according to static STN-SR triggering inquiry HSS；And E-MSC triggers the number of a changing process, by static state
STN-SR is revised as dynamic STN-SR；Then E-MSC initiates calling using the dynamic STN-SR.This kind of mode is reduced to MME
Requirement.
STN-SR and the number of changing process are obtained for E-MSC triggerings, specifically：E-MSC triggers a special business control
Function (SCF, Service Control Function) (i.e. STN-SR SCF) processed inquires about HSS, obtains dynamic STN-SR, and complete
Into the number of changing, as shown in Figure 4.
The solution of the present invention is illustrated below by specific embodiment.
The process of STN-SR distribution is illustrated in figure 5, wherein, P-CSCF, ATCF and HSS are all located at visiting domain, the flow
Including：
Step 501, UE is accessed by PS, and initiates to register to the IMS in visit domain, and registration message issues P-CSCF first；
Registration message is sent to ATCF by step 502, P-CSCF；
Registration message is sent to home domain IMS by step 503, ATCF；
Step 504, home domain IMS returns to 401 message to ATCF, wherein carrying registration challenge information；
Step 505, ATCF forwards 401 message to P-CSCF；
Step 506, P-CSCF forwards 401 message to UE；
Step 507, UE initiates registration message again, carries authentication information；
Step 508, P-CSCF forwards registration message to ATCF；
Step 509, ATCF forwards registration message to home domain IMS；
Step 510, home domain IMS confirms to registration, returns to 200OK and be responsive to ATCF；
Step 511, after ATCF receives the 200OK responses of accreditation verification, for the UE distributes dynamic STN-SR, and passes through
HSS is arrived in the storage of Sh ' interfaces；
Step 512, ATCF forwardings 200OK is responsive to P-CSCF；
Step 513, P-CSCF forwardings 200OK is responsive to UE, and registration is completed.
With reference to Fig. 3, the flow chart of E-SRVCC handoff procedures embodiment one of the present invention as shown in fig. 6, wherein, MME, E-
MSC, ATCF and HSS are respectively positioned on visit domain, and the flow includes：
Step 601, before E-SRVCC switchings, MME triggering inquiry HSS therefrom obtain the dynamic STN- that ATCF is UE distribution
SR, and E-SRVCC switchings are initiated according to the dynamic STN-SR；
Step 602, after getting dynamic STN-SR, MME initiates handover request (the PS to CS of PS to CS to E-MSC
Req), the dynamic STN-SR of UE is carried in the request message；
Step 603, E-MSC initiates calling using the dynamic STN-SR, and call request is routed to and distributes the dynamic STN-
The ATCF of SR.
In order to further consider to reduce the requirement of MME, the present invention proposes the optimization side that a kind of MME obtains dynamic STN-SR
Case, during E-SRVCC switchings are initiated, MME does not differentiate between SRVCC switchings or E-SRVCC switchings simultaneously, unified by original
SRVCC handoff procedures the static STN-SR of UE is carried in PS to CS Req message.In order to distinguish the STN- of static allocation
The SR and STN-SR of dynamically distributes, in the present invention, static STN-SR is represented with SCC_AS STN-SR, is represented with ATCF STN-SR
Dynamic STN-SR.
The E-SRVCC switching flows of the optimization as shown in fig. 7, comprises：
MME first initiates E-SRVCC switchings according to static STN-SR, then performs following flow：
Step 701, MME sends PS to CS Req message to E-MSC, carries SCC_AS STN-SR；
Step 702, when domain offer E-SRVCC functions are visited, E-MSC triggers STN-SR according to SCC_AS STN-SR
SCF；
Step 703, STN-SR SCF inquiry HSS, obtains ATCF STN-SR；
Step 704, STN-SR SCF perform the number of changing, and SCC_AS STN-SR are revised as into ATCF STN-SR, and notify E-
MSC；
Step 705, E-MSC initiates calling using ATCF STN-SR, and call request is routed to and distributes the ATCF STN-
The ATCF of SR.
In order to realize above-mentioned acquisition methods, present invention also offers a kind of acquisition system of STN-SR, such as Fig. 8 and Fig. 9 institutes
Show, including ATCF, HSS and acquisition network element in visit domain；Wherein,
ATCF, for distributing dynamic STN-SR for user, and stores in HSS；
HSS, for storing dynamic STN-SR；
Network element is obtained, for obtaining dynamic STN-SR from HSS, and E-SRVCC switchings is initiated.
The system can also include a managed network element, and for the data-interface between expansion AT CF and HSS, the network element is
Optionally.
Wherein, after the 200OK responses of the accreditation verification for receiving home domain return, ATCF is user's distribution dynamic STN-
SR, and dynamic STN-SR is stored in HSS by the data-interface for extending.
Dynamic STN-SR is obtained from HSS, and initiates the mode of E-SRVCC switchings has following two：
First, obtaining network element includes MME and E-MSC, as shown in Figure 8.
Before E-SRVCC switchings, MME is used to trigger inquiry HSS, obtains dynamic STN-SR, and initiate E-SRVCC switchings；
E-MSC, the handover request message of PS to the CS sent after dynamic STN-SR is obtained for receiving MME, and the switching please
Seek carrying dynamic STN-SR in message；E-MSC is also used for the dynamic STN-SR and initiates calling.
2nd, obtaining network element includes MME and E-MSC, as shown in Figure 9.
MME, for initiating E-SRVCC switchings；It is additionally operable to be sent to E-MSC the PS for carrying the corresponding static STN-SR of user
To the handover request message of CS；
E-MSC, the handover request of PS to the CS of the corresponding static STN-SR of carrying user for receiving MME transmissions disappears
Breath；And when it is determined that visit domain provides E-SRVCC functions, according to static STN-SR triggering inquiry HSS, dynamic STN-SR is obtained,
And static STN-SR is revised as dynamic STN-SR；It is also used for dynamic STN-SR and initiates calling.
Further, as shown in figure 9, obtaining network element also includes STN-SR SCF, for providing E-SRVCC work(in visit domain
During energy, by E-MSC according to static STN-SR triggering inquiry HSS, dynamic STN-SR is obtained, and static STN-SR is revised as dynamic
After STN-SR, E-MSC is notified.
The above, only presently preferred embodiments of the present invention is not intended to limit the scope of the present invention.
Claims (12)
1. a kind of acquisition methods of E-SRVCC STN-SR, it is characterised in that the method includes：
The dynamic single wireless voice calling continuity meeting that access switching control function ATCF in visit domain will be distributed for user
Words Handover Number STN-SR is stored in the home subscriber server HSS in visit domain；
The dynamic STN-SR is obtained from the HSS.
2. acquisition methods of E-SRVCC STN-SR according to claim 1, it is characterised in that the method also includes：Extension
Data-interface between the ATCF and the HSS.
3. acquisition methods of E-SRVCC STN-SR according to claim 2, it is characterised in that the ATCF in the visit domain
The dynamic STN-SR that will be distributed for user is stored in the HSS in visit domain, including：
It is user distribution dynamic STN-SR after the ATCF receives the 200OK responses of the accreditation verification of home domain return, and will
The dynamic STN-SR is stored in the HSS by the data-interface for extending.
4. according to claim 1 or 3 E-SRVCC STN-SR acquisition methods, it is characterised in that from the HSS obtain
The dynamic STN-SR, including：
The mobile management entity MME triggering inquiry HSS, obtains the dynamic STN-SR, and initiate enhanced single wireless language
Voice call continuity E-SRVCC switches；
The MME sends packet switch PS cutting to circuit switching (CS) to the enhanced mobile switching centre E-MSC in visit domain
Request message is changed, and carries the dynamic STN-SR；
The E-MSC initiates calling using the dynamic STN-SR, and call request is routed to the distribution dynamic STN-SR's
ATCF。
5. according to claim 1 or 3 E-SRVCC STN-SR acquisition methods, it is characterised in that from the HSS obtain
The dynamic STN-SR, including：
Mobile management entity MME initiates E-SRVCC switchings；
The MME sends the handover request message of PS to CS to the E-MSC in visit domain, and carries the corresponding static STN- of user
SR；
It is determined that when visit domain provides E-SRVCC functions, the E-MSC is obtained according to the static STN-SR triggerings inquiry HSS
The dynamic STN-SR is taken, and the static STN-SR is revised as the dynamic STN-SR；
The E-MSC initiates calling using the dynamic STN-SR, and call request is routed to the distribution dynamic STN-SR's
ATCF。
6. acquisition methods of E-SRVCC STN-SR according to claim 5, it is characterised in that the E-MSC is according to
The static STN-SR triggerings inquiry HSS, obtains the dynamic STN-SR, and the static STN-SR is revised as into the dynamic
STN-SR, including：
The E-MSC is according to the STN-SR service control functions SCF in the static STN-SR triggerings visit domain；
The STN-SR SCF inquire about the HSS, obtain the dynamic STN-SR, and the static STN-SR are revised as described
After dynamic STN-SR, the E-MSC is notified.
7. a kind of acquisition system of E-SRVCC STN-SR, it is characterised in that including ATCF, the HSS in visit domain and obtain
Take network element；Wherein,
The ATCF, for distributing dynamic STN-SR for user, and stores in the HSS；
The HSS, for storing the dynamic STN-SR；
The acquisition network element, for obtaining the dynamic STN-SR from the HSS.
8. the acquisition system of E-SRVCC STN-SR according to claim 7, it is characterised in that the system also includes management net
Unit, for extending the data-interface between the ATCF and the HSS.
9. the acquisition system of E-SRVCC STN-SR according to claim 8, it is characterised in that the ATCF, is additionally operable to connect
It is user distribution dynamic STN-SR after the 200OK responses of the accreditation verification for receiving home domain return, and by the dynamic STN-SR
Stored in the HSS by the data-interface for extending.
10. according to claim 7 or 9 E-SRVCC STN-SR acquisition system, it is characterised in that the acquisition network element bag
Include MME and E-MSC；
The MME, for triggering the inquiry HSS, obtains the dynamic STN-SR, and initiate E-SRVCC switchings；
The E-MSC, the handover request message of PS to the CS sent after the dynamic STN-SR is obtained for receiving the MME,
The dynamic STN-SR is carried in the handover request message；It is also used for the dynamic STN-SR and initiates calling.
11. according to claim 7 or 9 E-SRVCC STN-SR acquisition system, it is characterised in that the acquisition network element bag
Include MME and E-MSC；
The MME, for initiating E-SRVCC switchings；It is additionally operable to be sent to the E-MSC and carries the corresponding static STN-SR of user
PS to CS handover request message；
The E-MSC, the handover request message for receiving PS to the CS；It is additionally operable to it is determined that visit domain provides E-SRVCC
During function, according to the static STN-SR triggering inquiry HSS, the dynamic STN-SR is obtained, and by the static STN-
SR is revised as the dynamic STN-SR；It is also used for the dynamic STN-SR and initiates calling.
12. according to claim 11 E-SRVCC STN-SR acquisition system, it is characterised in that the acquisition network element is also wrapped
STN-SR SCF are included, for when domain offer E-SRVCC functions are visited, being triggered according to the static STN-SR by the E-MSC
Inquire about the HSS, obtain the dynamic STN-SR, and after the static STN-SR is revised as into the dynamic STN-SR, notify
The E-MSC.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110142022.8A CN102802222B (en) | 2011-05-26 | 2011-05-26 | The acquisition methods and system of a kind of E SRVCC STN SR |
| PCT/CN2012/074440 WO2012159518A1 (en) | 2011-05-26 | 2012-04-20 | Method and system for acquiring e-srvcc stn-sr |
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| CN201110142022.8A CN102802222B (en) | 2011-05-26 | 2011-05-26 | The acquisition methods and system of a kind of E SRVCC STN SR |
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| CN107517453A (en) * | 2012-12-31 | 2017-12-26 | 中兴通讯股份有限公司 | Identification information, the sending method of call handover request and device |
| US20140269611A1 (en) * | 2013-03-14 | 2014-09-18 | T-Mobile Usa, Inc. | Communication Handovers from Networks Using Unlicensed Spectrum to Circuit-Switched Networks |
| CN103561432B (en) * | 2013-10-28 | 2017-04-12 | 华为技术有限公司 | Single radio voice call continuity transfer method, equipment and system |
| CN104205886A (en) * | 2013-12-03 | 2014-12-10 | 华为技术有限公司 | Method and apparatus for maintaining call continuity |
| CN109996298B (en) * | 2017-12-31 | 2021-11-09 | 中国移动通信集团重庆有限公司 | Cross-network switching method, device, equipment and medium |
| 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 |
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| CN101227677A (en) * | 2008-02-05 | 2008-07-23 | 中兴通讯股份有限公司 | Single wireless channel voice business continuity field switching method |
| CN101227647A (en) * | 2008-02-05 | 2008-07-23 | 中兴通讯股份有限公司 | Switching method of keeping multimedia conversation continuity business |
| CN101662756A (en) * | 2008-08-28 | 2010-03-03 | 华为技术有限公司 | Voice continuous call switching method and system and mobile service switching center |
| EP2288205A1 (en) * | 2009-08-17 | 2011-02-23 | Alcatel Lucent | Method and apparatus for roaming between HPLMN with CSoPS IWF interworking function and VPLMN supporting SRVCC |
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| CN1479493A (en) * | 2002-08-31 | 2004-03-03 | 深圳市中兴通讯股份有限公司 | Interconnectioin system |
| CN101064648A (en) * | 2006-04-30 | 2007-10-31 | 华为技术有限公司 | System for realizing mobile IPv6 and its method for establishing user connection |
| CN101483929B (en) * | 2008-01-08 | 2011-06-01 | 华为技术有限公司 | Method and apparatus for obtaining interaction mode with policy making entity by non-3GPP access gateway |
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- 2012-04-20 WO PCT/CN2012/074440 patent/WO2012159518A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101227677A (en) * | 2008-02-05 | 2008-07-23 | 中兴通讯股份有限公司 | Single wireless channel voice business continuity field switching method |
| CN101227647A (en) * | 2008-02-05 | 2008-07-23 | 中兴通讯股份有限公司 | Switching method of keeping multimedia conversation continuity business |
| CN101662756A (en) * | 2008-08-28 | 2010-03-03 | 华为技术有限公司 | Voice continuous call switching method and system and mobile service switching center |
| EP2288205A1 (en) * | 2009-08-17 | 2011-02-23 | Alcatel Lucent | Method and apparatus for roaming between HPLMN with CSoPS IWF interworking function and VPLMN supporting SRVCC |
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| CN102802222A (en) | 2012-11-28 |
| WO2012159518A1 (en) | 2012-11-29 |
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