CN100490558C - Switching detection device, session switching system and method - Google Patents
Switching detection device, session switching system and method Download PDFInfo
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- CN100490558C CN100490558C CNB2007100263670A CN200710026367A CN100490558C CN 100490558 C CN100490558 C CN 100490558C CN B2007100263670 A CNB2007100263670 A CN B2007100263670A CN 200710026367 A CN200710026367 A CN 200710026367A CN 100490558 C CN100490558 C CN 100490558C
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Abstract
The method includes steps: receiving information of capability of switching session and requirement reported from terminal; in procedure of establishing session, based on the reported information to determine whether the terminal possesses capability of switching session and requirement; if yes, then triggering session the terminal participating in to the switching control device (SCD); SCD initiates subsequent call, establishing session; when movement of terminal position changes the access domain of the terminal, SCD and the terminal build session in the access domain after movement of terminal position instead of session before movement of terminal position so as to accomplish switching session. The invention also discloses SCD and system for switching session. The invention saves system resources and improves system performance greatly.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to a kind of change detection device, session switched system and method.
Background technology
Along with the development that the communication full-service is managed, a lot of operators can provide the homogeneity business with two or more networks.For example, some operator can wait by mobile network, Personal Handyphone System and fixed network voice service and data service are provided.In this case, the network integration becomes a developing direction of present network technology.The network integration is meant that the Internet resources with various access technologies merge, and unified business is provided, and for example, mobile network, Personal Handyphone System and fixed network resource integrated provides voicedata service.Reach such network integration purpose, just need a kind of network control technology that is independent of access network, is independent of upper layer application, IP Multimedia System (IMS, IP Multimedia Subsystem) possesses the fusion that such ability realizes network.
IMS is the 3G network core technology standard that 3GPP organizes to set up at first, has been included into the core standard framework of next generation network (NGN, National GolfNetwork) at present, and is to realize not fixing/important technology basis that the mobile network is merged.Up to the present IMS has R5, R6 and three versions of R7.Wherein, the R7 version has been introduced the access of fixed network, defines continuous voice call (VCC, Voice CallContinuity) technology in the R7 version and inserts fusion to fixed network.
No matter whether the user who holds the dual-mode handset terminal in the zone that has wireless lan signal to cover, have mobile cellular to insert after having applied for the VCC business, preferentially inserts from WLAN (wireless local area network), enjoys more economic ip voice and abundanter multimedia service; And when roaming out this WLAN (wireless local area network) area of coverage, then use default wide covering mobile cellular place in circuit exchange (CS, Circuit Switch) territory voice service.The switching of this input field is to be realized by call continuity controlled function (CCCF, Call Continuity Control Function) by the session that the contracted user of VCC business is participated in (caller or called).Idiographic flow comprises:
Step 1 judges that whether the user is the VCC contracted user, if the judgment is Yes, is triggered to user conversation the application server that comprises the CCCF function;
Step 2 is that starting point is initiated subsequent voice calls with the application server that comprises the CCCF function, sets up session;
Step 3 when described terminal location moves when terminal place input field is changed, comprises the application server of CCCF function and described terminal and moves place, back input field at terminal location and set up session and replace session before terminal location moves, finishes the session switching.
Wherein, it can be to move to the IMS territory from the CS territory that terminal location moves, and also can be to move to the CS territory from the IMS territory.
At present only by judging whether the user is triggered to the application server that comprises the CCCF function for the VCC contracted user need to determine whether the session with the user participates in, as long as user applies the VCC business, system can all be triggered to the application server that comprises the CCCF function with all sessions of user, when needing session to switch with box lunch, the application server of the described CCCF of comprising function and described terminal place input field after terminal location moves is set up the session before session replacement terminal location moves, and finishes session and switches.There is the unnecessary processing under the stable condition in this switching flow, waste system resource and reduction systematic function.Such as, the VCC contracted user is not wishing that session switches in the section sometime, perhaps this contracted user has changed in the time of can't supporting the terminal of VCC business need in the section of judging after the user is the VCC contracted user sometime, from individual subscriber wish or terminal capability aspect, this type of session can not switch, it is unnecessary that this type of session is triggered to the application server that comprises the CCCF function, has caused the waste of the application server resource that comprises the CCCF function, the waste of signaling link resource and the decline of systematic function.
Summary of the invention
Embodiment of the invention technical problem to be solved is, a kind of conversation switching method, change detection device and session switched system are provided, greatly conserve system resources and improve systematic function.
In order to solve the problems of the technologies described above, the embodiment of the invention has proposed a kind of conversation switching method, comprising:
Session switching capability and demand information that receiving terminal reports;
Set up in the process in session, session switching capability and demand information according to described terminal to report, judge whether described terminal has session switching capability and demand, if the judgment is Yes, the session that described terminal is participated in is triggered to switch device, switch device is initiated subsequent voice calls, sets up session;
When described terminal location moves when terminal place input field is changed, switch device and described terminal move place, back input field at terminal location and set up session and replace session before terminal location moves, finish the session switching.
Correspondingly, the present invention also provides a kind of change detection device, comprising:
Information receiving unit is used for terminal session switching capability and demand information that receiving terminal reports;
Judging unit is used for judging according to the described reporting information that described information receiving unit receives whether described terminal has session switching capability and demand, and the judged result of output positive or negative;
Trigger element is used for behind the affirmative determination result who receives described judging unit output, and the session that described terminal is participated in is triggered to switch device.
Correspondingly, the present invention also provides a kind of session switched system, comprises change detection device and switch device, wherein:
The change detection device is used for judging according to the session switching capability and the demand information of terminal to report whether described terminal has session switching capability and demand, and is being judged as when being, the session that described terminal is participated in is triggered to switch device;
Switch device, be used for after the triggering signal that receives described change detection device, initiate subsequent voice calls, and move when terminal place input field is changed when described terminal location, move back place input field with described terminal at terminal location and set up session and replace session before terminal location moves, finish the session switching.
The embodiment of the invention is set up in the process in session, judges it is whether described terminal has session switching capability and demand to determine whether that session is triggered to switch device according to the session switching capability of the terminal of storing in the particular network device and demand.All sessions of avoiding all terminals with all VCC contracted users to participate in are triggered to switch device, save system resource greatly and improve systematic function.
Description of drawings
Fig. 1 is that the structure of an embodiment of session switched system of the present invention is formed schematic diagram;
Fig. 2 is that the structure of change detection device among Fig. 1 is formed schematic diagram;
Fig. 3 is the flow chart of first embodiment of conversation switching method of the present invention;
Fig. 4 is the flow chart of second embodiment of conversation switching method of the present invention;
Fig. 5 is the flow chart of the 3rd embodiment of conversation switching method of the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the embodiment of the invention is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is that the structure of an embodiment of session switched system of the present invention is formed schematic diagram, and as shown in Figure 1, the session switched system of present embodiment comprises change detection device 20 and switch device 30, wherein:
Switch device 30, be used for after the triggering signal that receives described change detection device 20, initiate subsequent voice calls, when described terminal location moves when terminal place input field is changed, move back place input field with described terminal at terminal location and set up session and replace session before terminal location moves, finish the session switching.
Generally speaking, in order to guarantee the seamless switching of session in the communication process, set up in the process in session, session need be triggered to the switch device in the network, by switch device record session information, and initiate subsequent voice calls, set up session, this process is referred to as grappling, is responsible for realizing that the switch device of grappling is referred to as anchor point.Like this in follow-up communication process, when terminal location moves when terminal place input field is changed, anchor point and described terminal move place, back input field at terminal location and set up session and replace session before terminal location moves, finish the session switching.In the present embodiment, change detection device 20 triggers the session of described terminal participation to switch device 30, by switch device 30 record session informations, initiates subsequent voice calls, set up session process we be referred to as the grappling flow process, switch device 30 is referred to as anchor point.
In the specific implementation, terminal can be for supporting the VCC terminal of VCC business, the session switching capability of VCC terminal to report and demand comprise self session switching capability and switching demand, the VCC terminal reports self session switching capability with " having the session switching capability ", the session switching demand information of VCC terminal can be provided with the interface and be provided with and change by the parameter of terminal, be defaulted as " have session and switch demand " generally speaking; Terminal also can be for not supporting the ordinary terminal equipment of VCC business, session switching capability that ordinary terminal equipment reports and demand information can comprise self session switching capability and session switching demand, do not report with " not having the session switching capability " and " do not have session and switch demand ", session switching capability that ordinary terminal equipment reports and demand information also can include only self session switching capability information, do not report with " not having switching capability ".Described change detection device 20 can be attaching position register (HLR, Home LocationRegister), home subscriber server (HSS, Home Subscriber Server), global system for mobile communications (GSM, Global System for Mobile Communication) Network controlled function equipment (GSMSCF, GSM Service Control Function) and application server for continuity of voice call (VCC AS, VCC Application Server).Described switch device 30 can be for comprising the application server of CCCF function.It can be to move to the IMS territory from the CS territory that terminal location moves, and also can be to move to the CS territory from the IMS territory.
Accordingly, Fig. 2 is the structure composition schematic diagram of a kind of preferred implementation of change detection device 20.As shown in Figure 2, the change detection device 20 of present embodiment comprises information receiving unit 201, judging unit 202, trigger element 203, wherein:
Preferable, the judging unit 202 of present embodiment comprises first judging unit 2021 and second judging unit 2022, wherein:
Accordingly, the embodiment of the invention provides a kind of conversation switching method, and the concise and to the point flow process of embodiment of the invention conversation switching method comprises: session switching capability and demand information that receiving terminal reports; Set up in the process in session, session switching capability and demand information according to described terminal to report, judge whether described terminal has session switching capability and demand, if the judgment is Yes, the session that described terminal is participated in is triggered to switch device, switch device is initiated subsequent voice calls, sets up session; When described terminal location moves when terminal place input field is changed, switch device and described terminal move place, back input field at terminal location and set up session and replace session before terminal location moves, finish the session switching.
Wherein, terminal comprises the VCC terminal of supporting the VCC business, the session switching capability of VCC terminal to report and demand comprise self session access switching capability and switching demand, the VCC terminal reports self session access switching capability with " have session and insert switching capability ", and the session of VCC terminal access switching demand information can be provided with the interface and be provided with and change by the parameter of terminal, be defaulted as " have session and insert the switching demand " generally speaking; Terminal also comprises the ordinary terminal equipment of not supporting the VCC business, session switching capability that ordinary terminal equipment reports and demand can comprise self session access switching capability and session access switching demand, do not report with " not having session access switching capability " and " not needing session to insert the switching demand ", session switching capability that ordinary terminal equipment reports and demand also can include only self session access switching capability information, do not report with " not having the access switching capability ".The session switching capability that described receiving terminal reports and the device of demand information can be attaching position register (HLR, Home LocationRegister), home subscriber server (HSS, Home Subscriber Server), global system for mobile communications (GSM, Global System for Mobile Communication) Network controlled function equipment (GSMSCF, GSM Service Control Function) and application server for continuity of voice call (VCC AS, VCC Application Server), below by several specific embodiments conversation switching method is described.
Concrete, Fig. 3 is the conversation switching method flow chart of first embodiment of the invention.A kind of optimization method of the session switching flow when present embodiment is described terminal initial and is positioned at the CS input field.In the present embodiment, attaching position register meeting extending user subscription data form increases terminal session switching capability and terminal session and switches two contents of demand, is used to write down the session switching capability and the demand of terminal to report.As shown in Figure 3, the conversation switching method of present embodiment specifically comprises:
Step S100, terminal reports the log-on message that comprises self session switching capability and demand to attaching position register.Generally speaking, during the terminal equipment start, can register automatically, this enforcement increases session switching capability and requirement item, when terminal has then reported terminal session switching capability and demand information when attaching position register is registered by log-on message is expanded.Accordingly, when terminal is roamed in network coverage, can report location update message from the trend attaching position register, during concrete enforcement, terminal also can be by expanding location update message, increase session switching capability and requirement item, when terminal has then reported terminal session switching capability and demand information when attaching position register reports location update message.
Step S101 judges whether described terminal has the session switching capability, if the judgment is Yes, and execution in step S102; Otherwise, carry out the session flow process by normal flow.Set up in the process in session, (the MSC of mobile switching centre, Mobile Switching Center) attaching position register HLR will be arrived and (also VLR Visitor Location Register (VLR can be arrived, Visitor Location Register)) inquiring user CAMEL-Subscription-Information in, session switching capability and demand that HLR will inquiry terminal reports, need to judge whether the session with terminal participates in to be triggered to the application server that comprises the CCCF function, whether step S101 judges for having the session switching capability whether described terminal has the session switching capability by the terminal session switching capability item in the inquiring user subscription data form.
Step S102 judges whether described terminal has session and switch demand, if the judgment is Yes, and execution in step S103; Otherwise, carry out the session flow process by normal flow.When HLR inserted switching capability when the terminal session switching capability item in the inquiring user subscription data form for having session, whether the further inquiry terminal session switching of step S102 requirement item judged for having session switching demand whether described terminal has session and switch demand.
Step S103, the session that described terminal is participated in is triggered to the application server that comprises the CCCF function, and described application server is initiated subsequent voice calls, sets up session.
Step S104, when described terminal location moves when terminal place input field is changed, switch device and described terminal move place, back input field at terminal location and set up session and replace session before terminal location moves, finish the session switching.
Accordingly, when terminal initial is positioned at the IMS territory, can register and report location update message, can adopt the mode identical that the session switching flow that the terminal that initially is positioned at the IMS territory participates in is optimized with first embodiment to home subscriber server.
Accordingly, during concrete enforcement, business information data format on expansion GSM Network controlled function equipment or the application server for continuity of voice call increases terminal session switching capability and terminal session and switches two contents of demand, is used to write down the session switching capability and the demand of terminal to report.When terminal to attaching position register or after home subscriber server has reported terminal session switching capability and demand, attaching position register is with the session switching capability of terminal to report and demand notice GSM Network controlled function equipment or home subscriber server session switching capability and the demand notice application server for continuity of voice call with terminal to report.Such as, by Extended Protocol, increase notify message at attaching position register and GSM Network controlled function equipment room or transmission terminal session access switching registration message between home subscriber server and application server for continuity of voice call.Set up in the process in session, switch two information of demand by terminal session switching capability in the business information data format of storing on inquiry GSM Network controlled function equipment or the application server for continuity of voice call and terminal session and judge whether to need session is triggered to the application server that comprises the CCCF function.
Fig. 4 is the conversation switching method flow chart of second embodiment of the invention.In the present embodiment, application server for continuity of voice call extending user business information data format increases terminal session and inserts switching capability and two contents of terminal session access switching demand, is used to write down the session switching capability and the demand of terminal to report.As shown in Figure 4, the conversation switching method of present embodiment specifically comprises:
Step S200, terminal reports application server for continuity of voice call by the related communication interface of configuration with self session switching capability and demand.Defined the V3 interface among the 3GPP TS23.206-700, be used to realize the VCC terminal directly and application server for continuity of voice call communicate, in the specific implementation, the VCC terminal can be directly sends to application server for continuity of voice call by the V3 interface with self session switching capability and demand.Also can realize the transmission of session switching capability and demand for other-end equipment by direct communication of the related communication interface of configuration with application server for continuity of voice call.
Step S201 judges whether described terminal has the session switching capability, if the judgment is Yes, and execution in step S202; Otherwise, carry out the session flow process by normal flow.Set up in the process in session, call session control functional equipment (CSCF, Call Session Control Function) can triggering session arrive application server for continuity of voice call, application server for continuity of voice call is with the inquiring user business information, during inquiry business information, session switching capability and demand according to the terminal to report of storing need to judge whether the session with described terminal participates in be triggered to the application server that comprises the CCCF function, and at first whether the terminal session switching capability item in the inquiring user business information data format judges for having the session switching capability whether described terminal has the session switching capability.
Step S202 judges whether described terminal has session and switch demand, if the judgment is Yes, and execution in step S203; Otherwise, carry out the session flow process by normal flow.When the terminal session switching capability item in the inquiring user business information data format when having the session switching capability, further whether inquiry terminal session requirement item judges for having session switching demand whether described terminal has session and switch demand.
Step S203, the session that described terminal is participated in is triggered to the application server that comprises the CCCF function, and described application server is initiated subsequent voice calls, sets up session.
Step S204, when described terminal location moves when terminal place input field is changed, switch device and described terminal move place, back input field at terminal location and set up session and replace session before terminal location moves, finish the session switching.
Fig. 5 is the conversation switching method flow chart of third embodiment of the invention.Present embodiment and the difference of second embodiment are that terminal to report terminal session switching capability and demand give the mode of application server for continuity of voice call different.As shown in Figure 5, the conversation switching method of present embodiment specifically comprises:
Step S300, terminal reports self session switching capability and demand by the mode of short message to the Unstructured Supplementary Service Data server.
Step S301, the Unstructured Supplementary Service Data server is with the session switching capability and the demand notice application server for continuity of voice call of described terminal.
Step S302 judges whether described terminal has the session switching capability, if the judgment is Yes, and execution in step S303; Otherwise, carry out the session flow process by normal flow.
Step S303 judges whether described terminal has session and switch demand, if the judgment is Yes, and execution in step S304; Otherwise, carry out the session flow process by normal flow.
Step S304, the session that described terminal is participated in is triggered to the application server that comprises the CCCF function, and described application server is initiated subsequent voice calls, sets up session.
Step S305, when described terminal location moves when terminal place input field is changed, switch device and described terminal move place, back input field at terminal location and set up session and replace session before terminal location moves, finish the session switching.
Accordingly, the Unstructured Supplementary Service Data server can intercom mutually with GSM Network controlled function equipment room, the user service information data format of expansion GSM Network controlled function equipment, increase terminal session switching capability and terminal session and switch two contents of demand, be used to write down the session switching capability and the demand of terminal to report, after the Unstructured Supplementary Service Data server receives the session switching capability of terminal to report and demand with the session switching capability and the demand notice GSM Network controlled function equipment of described terminal.Set up in the process in session, switch two information of demand by terminal session switching capability and terminal session in the business information data format of storing on the inquiry GSM Network controlled function equipment and need to judge whether session to be triggered to the application server that comprises the CCCF function described terminal participates in.
Accordingly, application server for continuity of voice call can intercom mutually with GSM Network controlled function equipment room, such as, communicate by the communication interface that defines among the 3GPP TS23.206-700.The user service information data format of expansion GSM Network controlled function equipment, increase terminal session switching capability and terminal session and switch two contents of demand, be used to write down the session switching capability and the demand of terminal to report, receive the terminal session switching capability and demand of terminal to report when application server for continuity of voice call after, by the related communication interface notice GSM Network controlled function equipment of configuration.Set up in the process in session, switch two information of demand by terminal session switching capability and terminal session in the business information data format of storing on the inquiry GSM Network controlled function equipment and need to judge whether session to be triggered to the application server that comprises the CCCF function described terminal participates in.
Above disclosed is preferred embodiment of the present invention only, can not limit the present invention's interest field certainly with this, and therefore the equivalent variations of doing according to claim of the present invention still belongs to the scope that the present invention is contained.
Claims (11)
1, a kind of conversation switching method is characterized in that, comprising:
Session switching capability and demand information that change detection device receiving terminal reports;
Set up in the process in session, described change detection device is according to the session switching capability and the demand information of described terminal to report, judge whether described terminal has session switching capability and demand, if the judgment is Yes, the session that described terminal is participated in is triggered to switch device, switch device is initiated subsequent voice calls, sets up session;
When described terminal location moves when terminal place input field is changed, switch device and described terminal move place, back input field at terminal location and set up session and replace session before terminal location moves, finish the session switching.
2, the method for claim 1 is characterized in that, described change detection device is an attaching position register, and the step of described session switching capability of terminal to report and demand information specifically comprises:
Terminal reports self session switching capability and demand information by log-on message or location update message to attaching position register;
The session switching capability that perhaps described receiving terminal reports and the device of demand information are home subscriber server, and the step of described session switching capability of terminal to report and demand information specifically comprises:
Terminal reports self session switching capability and demand information by log-on message or location update message to home subscriber server.
3, the method for claim 1 is characterized in that, described change detection device is a global system for mobile communications Network controlled function equipment, and the step of described session switching capability of terminal to report and demand information specifically comprises:
Terminal reports self session switching capability and demand information by log-on message or location update message to attaching position register;
Attaching position register is notified described global system for mobile communications Network controlled function equipment with described session switching capability and demand information;
The session switching capability that perhaps described receiving terminal reports and the device of demand information are application server for continuity of voice call, and the step of described session switching capability of terminal to report and demand information specifically comprises:
Terminal reports self session switching capability and demand information by log-on message or location update message to home subscriber server;
Home subscriber server is notified described application server for continuity of voice call with the described session switching capability and the demand information of described terminal to report.
4, the method for claim 1 is characterized in that, described change detection device is an application server for continuity of voice call, and the step of described session switching capability of terminal to report and demand information specifically comprises:
Terminal reports self session switching capability and demand information by the related communication interface of configuration to described application server for continuity of voice call.
5, the method for claim 1 is characterized in that, described change detection device is a global system for mobile communications Network controlled function equipment, and the step of described session switching capability of terminal to report and demand information specifically comprises:
Terminal reports self session switching capability and demand information by the related communication interface of configuration to application server for continuity of voice call;
Described application server for continuity of voice call is notified described global system for mobile communications Network controlled function equipment by the related communication interface of configuration with the session switching capability and the demand information of described terminal.
6, the method for claim 1 is characterized in that, described change detection device is an application server for continuity of voice call, and the step of described session switching capability of terminal to report and demand information specifically comprises:
Terminal reports self session switching capability and demand information by the mode of short message to the Unstructured Supplementary Service Data server;
Described Unstructured Supplementary Service Data server is notified described application server for continuity of voice call by the related communication interface of configuration with the session ability and the demand information of described terminal;
Perhaps the session switching capability that reports of receiving terminal and the device of demand information are global system for mobile communications Network controlled function equipment, and the step of described session switching capability of terminal to report and demand information specifically comprises:
Terminal reports self session switching capability and demand information by the mode of short message to the Unstructured Supplementary Service Data server;
Described Unstructured Supplementary Service Data server is notified described global system for mobile communications Network controlled function equipment by the related communication interface of configuration with the session switching capability and the demand information of described terminal.
7, the method for claim 1 is characterized in that, described change detection device is a global system for mobile communications Network controlled function equipment, and the step of described session switching capability of terminal to report and demand information specifically comprises:
Terminal reports self session switching capability and demand information by the mode of short message to the Unstructured Supplementary Service Data server;
Described Unstructured Supplementary Service Data server is notified described application server for continuity of voice call by the related communication interface of configuration with the session switching capability and the demand information of described terminal;
Described application server for continuity of voice call is notified described global system for mobile communications Network controlled function equipment by the related communication interface of configuration with the session switching capability and the demand information of described terminal.
8, as each described method among the claim 1-7, it is characterized in that, describedly set up in the process in session, session switching capability and demand according to described terminal to report, judge whether described terminal has session switching capability and demand, if the judgment is Yes, the session that described terminal is participated in is triggered to switch device, switch device is initiated subsequent voice calls, and the step of setting up session specifically comprises:
A0, set up in the process,, judge whether described terminal has the session switching capability according to the session switching capability and the demand information of described terminal to report in session, if the judgment is Yes, execution in step a1; Otherwise, stop;
A1, judge whether described terminal has session and switch demand, and if the judgment is Yes, the session that described terminal is participated in is triggered to switch device, and switch device is initiated subsequent voice calls, sets up session.
9, a kind of change detection device is characterized in that, comprising:
Information receiving unit is used for terminal session switching capability and demand information that receiving terminal reports;
Judging unit is used for judging according to the described reporting information that described information receiving unit receives whether described terminal has session switching capability and demand, and the judged result of output positive or negative;
Trigger element is used for behind the affirmative determination result who receives described judging unit output, and the session that described terminal is participated in is triggered to switch device.
10, device as claimed in claim 9 is characterized in that, described judging unit comprises:
First judging unit is used to judge whether described terminal has the session switching capability, and the judged result of output positive or negative;
Second judging unit is used for behind the affirmative determination result who receives described first judging unit output, judge whether described terminal has session and switch demand, and the judged result of output positive or negative is given described trigger element.
11, a kind of session switched system is characterized in that, comprises change detection device and switch device, wherein:
The change detection device is used for judging according to the session switching capability and the demand information of terminal to report whether described terminal has session switching capability and demand, and is being judged as when being, the session that described terminal is participated in is triggered to switch device;
Switch device, be used for after the triggering signal that receives described change detection device, initiate subsequent voice calls, and move when terminal place input field is changed when described terminal location, move back place input field with described terminal at terminal location and set up session and replace session before terminal location moves, finish the session switching.
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| CNB2007100263670A CN100490558C (en) | 2007-01-17 | 2007-01-17 | Switching detection device, session switching system and method |
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| CNB2007100263670A CN100490558C (en) | 2007-01-17 | 2007-01-17 | Switching detection device, session switching system and method |
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| CN100490558C true CN100490558C (en) | 2009-05-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101123651A (en) * | 2007-09-11 | 2008-02-13 | 华为技术有限公司 | Session switching method between terminals, switch and device |
| CN101374356B (en) * | 2008-10-15 | 2012-02-15 | 中兴通讯股份有限公司 | Method for switching VoIP in IMS domain, IMS system, terminal and VCC application server |
| CN102006269B (en) * | 2009-08-28 | 2013-10-16 | 中兴通讯股份有限公司 | Synchronization method and system for multi-session capability of IP multimedia subsystem |
| CN102056255B (en) * | 2009-11-11 | 2014-03-12 | 中兴通讯股份有限公司 | Session switching implementation method and system |
| CN102378148B (en) | 2010-08-23 | 2016-06-01 | 中兴通讯股份有限公司 | Terminal, HSS and core network element know the method and system of terminal capability |
| CN108156634B (en) * | 2016-12-02 | 2022-08-19 | 中兴通讯股份有限公司 | Service processing method, device and system |
| US11140649B2 (en) | 2017-06-13 | 2021-10-05 | Lg Electronics Inc. | Method and apparatus for reporting location information of user equipment in wireless communication system |
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