CN101090567B - Calling service implementing method for voice calling continuous service - Google Patents
Calling service implementing method for voice calling continuous service Download PDFInfo
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Abstract
This invention discloses a realizing method for ending call service in a phone call continuous service including: S402, a service call session control functional entity transmits a session set-up request to a domain selecting functional entity in a phone call continuity application entity, S404, the domain selecting functional entity selects domains according to the request and adds the selection result to the request to forward it to a service call session control functional entity, S406, the control functional entity transmits the request with the domain selection result to other application servers to execute service logic process to get the session set-up request, S408, the control functional entity sends the request to a domain switch functional entity in the continuity entity for session anchoring, S410, the control functional entity receives the request from the domain switch functional entity and forwards it to a phone call continuity user device or a circuit domain network where the user device locates.
Description
Technical field
The present invention relates to the communications field, relate more specifically to the callee function implementation method in a kind of voice call continuity service.
Background technology
Along with IP Multimedia System (IP Multimedia Core Network Subsystem, be called for short IMS) and WLAN (wireless local area network) (Wireless Local Area Network, be called for short WLAN) etc. the development of packet radio technology, can on radio packet networks such as WLAN, realize the real-time voice transmission, most of business on the circuit domain (Circuit Switched Domain is called for short CS) are provided.
Call continuity business (Voice Call Continuity is called for short VCC) business can realize the voice communication of CS territory and based on seamless switching between the packet network voice communications such as IMS framework WLAN, guarantee the continuity of voice call.
The VCC business has following benefit:
(1) voice call transfer with the wireless communication networks of a part of circuit mode goes up to WLAN, alleviates the situation of anxiety of the Radio Resource of wireless communication networks in the WLAN coverage territory;
(2) provide the multiple business pattern, increase professional income;
(3) can adopt the IMS framework that fused business is provided.
In order to realize the VCC business, in the IMS territory, introduce VCC and use (VCCApplication), control the audio call process of VCC subscriber equipment in central controlled mode, and realize the switching between control CS territory and the IMS calling.
Fig. 1 is the reference framework of VCC business, has increased the VCC application at the framework of IMS, and whole framework comprises that VCC subscriber equipment 101, VCC use 102, CS territory equipment and IMS equipment.Wherein CS territory equipment comprises Visited Mobile Switching Center 107 (VisitedMobile Switching Centre, abbreviation VMSC), GMSC (gateway mobile switching center) 108 (Gateway Mobile Switching Centre, be called for short GMSC), for providing the CS territory, the VCC subscriber equipment inserts and service; IMS comprises Proxy Call Session Control Function 110 (Proxy Call Session Control Function, be called for short P-CSCF), query call conversation control function 111 (Interrogating Call Session Control Function, be called for short I-CSCF), service call conversation control function 112 (Serving Call Session ControlFunction, S-CSCF), home subscriber server 113 (Home Subscriber Server, be called for short HSS), MGCF 114 (Media Gateway ControlFunction, be called for short MGCF), for the VCC user terminal provides IMS to insert and service, for using, VCC provides session control simultaneously, functions such as route service; It is the control core of VCC business that VCC uses, and functions such as calling out grappling, territory selection, territory switching is provided; GSM Service Control Function 117 (GSM Service Control Function is called for short gsmSCF) and VCC use and cooperate, the route that control CS calls out in the territory; This framework provide simultaneously with public switch telephone network/Public Land Mobile Nerwork 116 (Public Switched TelephoneNetwork/Public Land Mobile Network, PSTN/PLMN) and the intercommunication of other IP multi-media networks 115.
VCC uses and comprises 4 functional entitys, cooperatively interacts and finishes the VCC business.
1) mobile network strengthens customized application logic (Customised Application forMobile network Enhanced Logic, be called for short CAMEL) service application 103: with the collaborative work of CS adaption function, finish rising of CS territory called for the function that the summation handoff request is routed to the VCC application.
2) the territory selection function 105: according to rules such as status of user equipment, user preferences, carrier policy, be one and go into to exhale to select a suitable access way (CS territory or IMS packet domain), and call out the VCC subscriber equipment by selected territory.
3) the CS adaption function 104: when the VCC subscriber equipment when exhale in the CS territory, serve as the user agent, set up and the getting in touch of territory handoff functionality.
4) the territory handoff functionality 106: in calling procedure, and according to the request and the switchover policy of VCC subscriber equipment, the just switching of the calling in communication process between CS territory and IMS of control.
The operation flow of VCC comprises registration, rise exhale, exhale eventually, handoff procedure, the present invention only pays close attention to and exhales process end.
According to exhaling purpose territory difference end, exhale flow process to be divided into two classes eventually: exhale flow process and the end that terminates in IMS to exhale flow process the end that terminates in the CS territory, and present realization flow is distinguished as shown in Figures 2 and 3.
As shown in Figure 2, having described the territory selection result is the reciprocal process in CS territory, and therefrom the territory selection function is positioned at after the handoff functionality of territory as can be seen, be in all application servers in the call path after, can't may further comprise the steps for other application servers in the call path provide the territory selection result:
S201, S-CSCF receives the session of exhaling eventually and sets up request message, request unified resource sign (Request URI) in the request message is for identifying (Session Initiation Protocol Uniform Resource Identifiers with the initial session protocol unified resource, be called for short SIPURI) or telephone number unified resource sign (Telephone number Uniform ResourceIdentifiers is called for short Tel URI) form represent the VCC public user identifier;
S202, S-CSCF is according to the professional control logic of customer service configuration execution;
S203, S-CSCF forward the VCC application to before request message is set up in session;
S204, the territory handoff functionality that VCC uses is this time called out according to the carrier policy grappling;
S205, the territory selection function that VCC uses terminates in the CS territory according to regular selective call;
S206, the territory selection function decision that VCC uses also generates CS territory routing number;
S207, territory selection function (step 207a) or territory handoff functionality (step 207b) replace with CS territory routing number with the Request URI in the session request of setting up, and forward S-CSCF to before session set up request message;
S208, S-CSCF sets up request message with session and is routed to the CS territory.
As shown in Figure 3, having described the territory selection result is the reciprocal process in IMS territory, and therefrom the territory selection function is positioned at after the handoff functionality of territory as can be seen, and its process and Fig. 2 process are similar substantially, may further comprise the steps:
S301, S-CSCF receive the session of exhaling eventually and set up request message, and the Request URI in the request message is for to represent the VCC public user identifier with SIP URI or Tel URI form;
S302, S-CSCF is according to the professional control logic of customer service configuration execution;
S303, S-CSCF forward the VCC application to before request message is set up in session;
S304, the territory handoff functionality that VCC uses is this time called out according to the carrier policy grappling;
S305, the territory selection function that VCC uses terminates in the IMS territory according to regular selective call;
S306 forwards S-CSCF to before request message is set up in the session that territory selection function (step 306a) or territory handoff functionality (step 306b) not change Request URI;
S307, S-CSCF forward the VCC subscriber equipment to before request message is set up in session.
From the above description as can be known, service call conversation control function (Serving Call SessionControl Function, be called for short S-CSCF) receive final call request after, according to professional control logic, be routed to the territory handoff functionality that VCC uses with calling out the call request of VCC subscriber equipment, the territory handoff functionality is carried out the grappling function, and by territory selection function selective call termination territory.If terminate in the CS territory, then generate CS territory routing number, and the request unified resource of replacing in the session foundation request with this number identifies (Request URI), by territory handoff functionality or territory selection function the session request of setting up is sent to S-CSCF then, S-CSCF before forwards the CS territory again to, finishes call establishment by the CS territory; If call ending in the IMS territory, keeps Request URI constant by territory handoff functionality or territory selection function, will forward S-CSCF before the setup requests to, call out the VCC subscriber equipment.
According to the demand of business, some application server can be retained in the session path.For fear of in handoff procedure, these application servers in session path are released, and influence call business, and the territory handoff functionality must be last server in the server that is retained in the session path.
In this framework, the territory selection function is positioned at after the handoff functionality of territory, and after other application server that promptly keeps in session path, therefore after above-mentioned service server executed session foundation request processing, the territory selection function just can be performed.But some service needed is known the territory selection result of this callee function, and carries out correspondent service logic.
With the supplementary service is example, and according to the business model of VCC, if the user is inserted by the CS territory, then the switch by the CS territory provides the supplementary service function, otherwise provides the supplementary service function by the supplementary service application server in IMS territory.
When exhaling eventually,, then should if the territory selection result is the CS territory, then call request triggers should not arrived supplementary business server with call request triggers to supplementary business server if the territory selection result is the IMS territory.In this case, IMS professional triggering control logic or supplementary business server need obtain the result that correct territory is selected, and finish triggering control and carry out the correspondent service logic processing according to this result.
And according to exhaling model the end of present VCC, the territory selection function is positioned at after supplementary business server and the corresponding business trigger point, and when the trigger compensation business server, the territory selection function that VCC uses is not also carried out, and causes realizing correct trigger process.
According to above analysis as can be seen, there are defective in present VCC service final call model and flow process, the territory selection function is arranged in and is retained in after other application server of calling out the road, make these application server Service Point Trigger or service logic can't obtain professional required territory selection result, can't realize the business information-related with these.
Summary of the invention
The present invention is intended to provide a kind of IP Multimedia System continuous voice call (Voice Call Continuity, abbreviation VCC) implementation method of professional callee function, callee function in order to the VCC business that realizes IP Multimedia System, overcome the callee function model of existing VCC business and the defective of flow process, make eventually z z z make the Service Point Trigger of other application servers on the path and service logic can obtain professional the triggering and the required VCC application domain selection result of professional execution.
According to an aspect of the present invention, callee function implementation method in a kind of voice call continuity service has been proposed.This method comprises: S402, and service call session control function entity is set up the territory selection functional entity of asking to be sent in the continuous voice call application entity with session after receiving session foundation request; S404, the territory selection functional entity is carried out the territory selection according to the session request of setting up, and goes to service call session control function entity before being added into the territory selection result in the session foundation request; The session request of setting up that S406, service call session control function entity will carry the territory selection result is sent to other application servers with the execution business logic processing, and obtains the session foundation request of returning from other application servers; And S408, the territory handover (mih) functions that service call session control function entity will be sent to the continuous voice call application entity from the session that carries the territory selection result request of setting up that other application servers return carries out Session Anchor; S410, service call session control function entity receive from the session of territory handover (mih) functions and set up request and will go to the circuit-domain network at voice call continuity user equipment or voice call continuity user equipment place before the session foundation request.
In above-mentioned callee function implementation method, callee function comprises callee function that terminates in circuit domain and/or the callee function that terminates in IP Multimedia System.
In above-mentioned callee function implementation method, session is set up in the request and is carried the continuous voice call public user identifier.
In above-mentioned callee function implementation method, the continuous voice call public user identifier is represented by request unified resource identification field.
In above-mentioned callee function implementation method, the request unified resource is designated initial session protocol unified resource sign or telephone number unified resource sign.
In above-mentioned callee function implementation method, be when terminating in the callee function of circuit domain at callee function, the territory selection functional entity can be determined the circuit domain routing number in the session foundation request back that receives from service call session control function entity.
In above-mentioned callee function implementation method, the territory selection functional entity can be added into the circuit domain routing number session that sends to service call session control function entity and set up request.
In above-mentioned callee function implementation method, at callee function is when terminating in the callee function of circuit domain, the territory handover (mih) functions is set up acquisition request circuit domain routing number from session, and will ask the unified resource sign to replace with the circuit domain routing number, under the situation of described service call session control function entity support, can delete the territory selection result.
In above-mentioned callee function implementation method, at callee function is when terminating in the callee function of circuit domain, the territory handover (mih) functions is from selection functional entity acquisition cuicuit territory, territory routing number, and will ask the unified resource sign to replace with the circuit domain routing number, under the situation of described service call session control function entity support, can delete the territory selection result.
In above-mentioned callee function implementation method, be when terminating in the callee function of IP Multimedia System at callee function, territory selection functional entity and territory handover (mih) functions all do not change the request unified resource sign in the session foundation request.
In above-mentioned callee function implementation method, be when terminating in the callee function of IP Multimedia System at callee function, the territory handover (mih) functions is after carrying out Session Anchor, and the territory selection result in the request is set up in the deletion session.
By the present invention, reached make eventually z z z make S-CSCF on the path and other application servers can obtain the required territory selection result of business effect, guaranteed professional correctness.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram that the reference frame of VCC application is shown;
Fig. 2 illustrates the flow chart of exhaling flow process the end that terminates in the CS territory;
Fig. 3 illustrates the flow chart of exhaling flow process the end that terminates in IMS;
Fig. 4 is the flow chart that illustrates according to the callee function implementation method in the voice call continuity service of the present invention;
Fig. 5 illustrates the flow chart of exhaling flow process according to the VCC in the CS of terminating in of the present invention territory eventually; And
Fig. 6 illustrates the flow chart of exhaling flow process according to the VCC in the IMS of terminating in of the present invention territory eventually.
Embodiment
Below with reference to accompanying drawing, the specific embodiment of the present invention is described.
With reference to figure 4, illustrate according to the callee function implementation method in a kind of voice call continuity service of the present invention.This method comprises: S402, and service call session control function entity is set up the territory selection functional entity of asking to be sent in the continuous voice call application entity with session after receiving session foundation request; S404, the territory selection functional entity is carried out the territory selection according to the session request of setting up, and goes to service call session control function entity before being added into the territory selection result in the session foundation request; The session request of setting up that S406, service call session control function entity will carry the territory selection result is sent to other application servers with the execution business logic processing, and obtains the session foundation request of returning from other application servers; And S408, service call session control function entity will carry the territory handover (mih) functions that the session request of setting up of territory selection result is sent in the continuous voice call application entity and carry out Session Anchor; S410, service call session control function entity receive from the session of territory handover (mih) functions and set up request and will go to the circuit-domain network at voice call continuity user equipment or voice call continuity user equipment place before the session foundation request.。
Wherein, callee function comprises callee function that terminates in circuit domain and/or the callee function that terminates in IP Multimedia System.Session is set up in the request and is carried the continuous voice call public user identifier.The continuous voice call public user identifier is represented by request unified resource identification field.The request unified resource is designated initial session protocol unified resource sign or telephone number unified resource sign.
Wherein, be when terminating in the callee function of circuit domain at callee function, the territory selection functional entity can be determined the circuit domain routing number in the session foundation request back that receives from service call session control function entity.The territory selection functional entity can be added into the circuit domain routing number session that sends to service call session control function entity and set up request.
In above-mentioned callee function implementation method, the territory selection functional entity can be passed through territory handover (mih) functions and selection functional entity acquisition cuicuit territory, territory routing number.
Wherein, at callee function is when terminating in the callee function of circuit domain, the territory handover (mih) functions is set up acquisition request circuit domain routing number from session, and unified resource sign replaced with the circuit domain routing number, under the situation of described service call session control function entity support, can delete the territory selection result.
Wherein, at callee function is when terminating in the callee function of circuit domain, the territory handover (mih) functions is from selection functional entity acquisition cuicuit territory, territory routing number, and unified resource sign replaced with the circuit domain routing number, under the situation of described service call session control function entity support, can delete the territory selection result.
Wherein, be when terminating in the callee function of IP Multimedia System at callee function, territory selection functional entity and territory handover (mih) functions all do not change the request unified resource sign in the session foundation request.
Wherein, be when terminating in the callee function of IP Multimedia System at callee function, the territory handover (mih) functions is after carrying out Session Anchor, and the territory selection result in the request is set up in the deletion session.
Particularly, describe specific embodiments of the invention in detail with reference to figure 5, Fig. 6.Wherein, Fig. 5 is the flow chart of exhaling flow process according to the VCC in the CS of terminating in of the present invention territory eventually; Fig. 6 is the flow chart of exhaling flow process according to the VCC in the IMS of terminating in of the present invention territory eventually.
As shown in Figure 5, having described the territory selection result is the reciprocal process in CS territory.When the customer service configuration is set, the territory selection function that VCC is used is placed on before all application servers relevant with the territory selection result, still will be retained in last server in the Servers-all in the session path after the territory handoff functionality is configured to switch and finishes.In addition, the territory handoff functionality of being used by VCC is removed the territory selection result in the session foundation request in this example, also can be removed to CS territory route the time by S-CSCF.This process may further comprise the steps:
S502, S-CSCF receive the session of exhaling eventually and set up request message, and the Request URI in the request message is for to represent the VCC public user identifier with SIP URI or Tel URI form;
S504, S-CSCF is according to the professional control logic of customer service configuration execution;
S506, S-CSCF forward the territory selection function that VCC uses to before request message is set up in session;
S508, the territory selection function selects to terminate in the CS territory according to the territory selective rule;
S510, territory selection function decision CS territory routing number;
S512, it is constant that the territory selection function keeps session to set up in the request Request URI, inserts the territory selection result simultaneously, and forward S-CSCF to before session set up request message;
S514, S-CSCF carries out professional control logic according to customer service configuration, and the territory selection result that can utilize session to set up this moment to comprise in the request message is as trigger condition;
S516, S-CSCF forward other application servers to before request message is set up in session;
S518, other application servers are carried out business logic processing;
S520, other application servers forward S-CSCF to before request message is set up in session;
S522, S-CSCF is according to the professional control logic of customer service configuration execution;
S524, S-CSCF forward the territory handoff functionality that VCC uses to before request message is set up in session;
S526, the territory handoff functionality is this time called out according to the carrier policy grappling;
S528 obtains CS territory routing number in the territory selection result of territory handoff functionality from the session request of setting up, or by and the territory selection function between interface obtain CS territory routing number from the territory selection function;
S530, the territory selection function replaces with CS territory routing number with Request URI in the session foundation request, removes the territory selection result, and forwards S-CSCF to before will asking;
S532, S-CSCF sets up request message with session and is routed to the CS territory.
As shown in Figure 6, having described the territory selection result is the reciprocal process in IMS territory.When the customer service configuration is set, the territory selection function that VCC is used be placed on all with the information-related application server of territory selection before, still to be retained in last server in the Servers-all in the session path after the territory handoff functionality is configured to switch and finishes.In addition, the territory handoff functionality of being used by VCC is removed the territory selection result in the session foundation request in this example, also can be removed to CS territory route the time by S-CSCF.This process may further comprise the steps:
Step 602, S-CSCF receives eventually and exhales initial session to set up request message, and the Request URI in the request message is for to represent the VCC public user identifier with SIP URI or Tel URI form;
Step 604, S-CSCF is according to the professional control logic of customer service configuration execution;
Step 606, S-CSCF forwards the territory selection function that VCC uses to before request message is set up in session;
Step 608, the territory selection function terminates in the IMS territory according to territory selective rule selective call;
It is constant that step 610, territory selection function keep initial call to set up in the request Request URI, inserts the territory selection result simultaneously, and forward S-CSCF to before session set up request message;
Step 612, S-CSCF can utilize the territory selection result that comprises in the session foundation request as trigger condition according to the professional control logic of customer service configuration execution this moment;
Step 614, S-CSCF forwards other application servers to before request message is set up in session;
Step 616, other application servers are finished business logic processing;
Step 618, other application servers forward S-CSCF to before request message is set up in session;
Step 620, S-CSCF is according to customer service configuration service control logic;
Step 622, S-CSCF forwards the territory handoff functionality that VCC uses to before request message is set up in session;
Step 624, the territory handoff functionality is this time called out according to the carrier policy grappling;
Step 626, Request URI was constant during territory selection function maintenance session was set up and asked, and removed the territory selection result, and forwarded S-CSCF to before will asking;
Step 628, S-CSCF forwards the VCC subscriber equipment to before request message is set up in session.
As seen from the above description, the implementation method according to the callee function of IP Multimedia System VCC business of the present invention may further comprise the steps:
(1) by disposing VCC user's business configuration data, the territory selection function that VCC is used is placed on before all application servers relevant with the territory selection result, and the territory handoff functionality of VCC application is configured to still will be retained in last server in the Servers-all in the session path after switching is finished;
(2) S-CSCF receives when exhaling the end that comprises the VCC public user identifier session to set up request, according to the professional control logic of setting in the business configuration, forwards the territory selection function that VCC uses to before session set up request message; ,
(3) the territory selection function is receiving after session sets up request message, according to the territory selective rule, and the termination territory of selective call; If terminate in the CS territory, the territory selection function need determine CS territory routing number;
(4) the territory selection function is inserted into the territory selection result in the session foundation request, and by ISC (the professional control interface of IP Multimedia System, IP multimedia SubsystemService Control Interface) interface request is sent to S-CSCF;
(5) S-CSCF is according to the professional control logic of setting in the business configuration, forward other application servers to before session set up request message, in the professional control procedure of the execution of S-CSCF, can utilize the professional triggering of institute's IncFlds selection result control in the initial session request;
(6) other application servers are carried out correspondent service logic, and the request of setting up of the session after will handling sends to S-CSCF;
(7) S-CSCF according to the professional control logic of setting in the business configuration, sends to territory handoff functionality that VCC use with the session request of setting up according to business configuration;
(8) the territory handoff functionality is carried out and is called out the grappling function, and according to territory selection result decision purpose route.If call ending is in the CS territory, the territory handoff functionality obtains CS territory routing number, session is set up ask unified resource sign (Request URI) to be set to CS territory routing number in the request, and call request is sent to S-CSCF.If terminate in IMS, the territory handoff functionality does not change Request URI in the call request, and call request is sent to S-CSCF;
(9) S-CSCF resolves the Request URI in the call request, if be CS territory routing number, then routes the call to CS territory, CS field subscriber equipment place, if be original public user identifier, then will call out and forward the VCC subscriber equipment to before direct.
Preferably, the territory selection result of the insertion described in the step (4) the territory access way (CS territory or IMS territory) that includes but not limited to terminate.When the territory selection result is the CS territory, can comprise or not comprise CS territory routing number in the territory selection result of insertion.
Preferably, when the territory selection result is the CS territory, in step (8), if the territory selection result that the territory selection function is inserted in step (4) comprises CS territory routing number, the territory handoff functionality can the territory selection result from call request obtain CS territory routing number so, otherwise the territory handoff functionality by and the territory selection function between interface obtain and comprise CS territory routing number in interior territory selection result.
Preferably, the territory selection function is not got rid of and is adopted other mode interaction area selection results except transmitting the territory selection result by ISC interface to other application servers.
Preferably,, can be chosen in when before CS territory or VCC subscriber equipment, changeing request message, whether remove the territory selection result of inserting in step (4) by the territory selection function according to carrier policy.If select to remove, can in step (7), when request is talked about in the change of team before S-CSCF, remove, or in step (8), when change of team words are asked before CS territory or VCC subscriber equipment, remove by S-CSCF by the territory handoff functionality.
The present invention is in the callee function of IP Multimedia System VCC business, adopted the territory selection function that VCC is used to be placed on before all application servers relevant with the territory selection result, after being configured to switch and finishing, the territory handoff functionality still to be retained in the method for last server in the Servers-all in the session path, and transmit the territory selection result by ISC interface or other modes, therefore reach the effect that makes S-CSCF and other application servers can obtain the required territory selection result of business, guaranteed professional correct realization.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. the callee function implementation method in the voice call continuity service is characterized in that described method comprises:
S402, service call session control function entity is set up the territory selection functional entity of asking to be sent in the continuous voice call application entity with described session after receiving session foundation request;
S404, described territory selection functional entity is carried out the territory selection according to the described session request of setting up, and goes to described service call session control function entity before being added into the territory selection result in the described session foundation request;
The session request of setting up that S406, described service call session control function entity will carry described territory selection result is sent to other application servers with the execution business logic processing, and obtains the session foundation request of returning from described other application servers; And
S408, the territory handover (mih) functions that described service call session control function entity will be sent to the described continuous voice call application entity from the session that the carries described territory selection result request of setting up that described other application servers return carries out Session Anchor; And
S410, described service call session control function entity receive from the session of described territory handover (mih) functions and set up request and will go to the circuit-domain network at voice call continuity user equipment or voice call continuity user equipment place before the described session foundation request.
2. callee function implementation method according to claim 1 is characterized in that, described callee function comprises callee function that terminates in circuit domain and/or the callee function that terminates in IP Multimedia System.
3. callee function implementation method according to claim 2 is characterized in that, described session is set up in the request and carried the continuous voice call public user identifier.
4. callee function implementation method according to claim 3 is characterized in that, described continuous voice call public user identifier is represented by request unified resource identification field.
5. callee function implementation method according to claim 4 is characterized in that, the described request unified resource is designated initial session protocol unified resource sign or telephone number unified resource sign.
6. callee function implementation method according to claim 4, it is characterized in that, at described callee function is when terminating in the callee function of circuit domain, and described territory selection functional entity is determined the circuit domain routing number in the session foundation request back that receives from described service call session control function entity.
7. callee function implementation method according to claim 6 is characterized in that, described territory selection functional entity is added into the described session that sends to described service call session control function entity with described circuit domain routing number and sets up request.
8. callee function implementation method according to claim 7, it is characterized in that, at described callee function is when terminating in the callee function of circuit domain, described territory handover (mih) functions is set up the described circuit domain routing number of acquisition request from described session, and described request unified resource sign is replaced with described circuit domain routing number.
9. callee function implementation method according to claim 7, it is characterized in that, at described callee function is when terminating in the callee function of circuit domain, described territory handover (mih) functions obtains described circuit domain routing number from described territory selection functional entity, and described request unified resource sign is replaced with described circuit domain routing number.
10. callee function implementation method according to claim 4, it is characterized in that, at described callee function is when terminating in the callee function of IP Multimedia System, and described territory selection functional entity and described territory handover (mih) functions all do not change the request unified resource sign in the described session foundation request.
11. callee function implementation method according to claim 10, it is characterized in that, at described callee function is when terminating in the callee function of IP Multimedia System, and described territory handover (mih) functions is deleted the territory selection result in the described session foundation request after carrying out Session Anchor.
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| CN2006101397790A CN101090567B (en) | 2006-09-25 | 2006-09-25 | Calling service implementing method for voice calling continuous service |
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| CN2006101397790A CN101090567B (en) | 2006-09-25 | 2006-09-25 | Calling service implementing method for voice calling continuous service |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101489288B (en) | 2008-01-16 | 2011-04-20 | 华为技术有限公司 | Circuit domain service processing method, system and related device in evolution packet network |
| CN102123469B (en) * | 2008-01-16 | 2014-11-19 | 华为技术有限公司 | Processing method and user equipment (UE) for circuit switched (CS) fallback service in evolved packet network |
| CN101883342B (en) | 2009-05-05 | 2014-12-10 | 华为终端有限公司 | Session transferring method, device and system |
| WO2015096012A1 (en) * | 2013-12-23 | 2015-07-02 | 华为终端有限公司 | Session processing method and apparatus |
| US9826452B2 (en) * | 2014-04-14 | 2017-11-21 | Mediatek Inc. | Apparatuses and methods for access domain selection (ADS) during an inter-radio access technology (IRAT) procedure |
| JP2017519452A (en) | 2014-06-24 | 2017-07-13 | 華為技術有限公司Ｈｕａｗｅｉ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｃｏ．，Ｌｔｄ． | Voice resource saving method, device and system |
| US10044769B2 (en) * | 2014-11-18 | 2018-08-07 | T-Mobile Usa, Inc. | Telecommunications network call control |
| CN109246682A (en) * | 2017-07-11 | 2019-01-18 | 中兴通讯股份有限公司 | A kind of area selecting method, device, the network equipment and storage medium |
| CN114126089A (en) | 2017-11-27 | 2022-03-01 | 华为技术有限公司 | Session processing method, device and system |
| CN109348470A (en) * | 2018-09-10 | 2019-02-15 | 中国联合网络通信集团有限公司 | Business switch method, terminal, network server and storage medium |
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| CN1801998A (en) * | 2004-12-31 | 2006-07-12 | 华为技术有限公司 | Conversation switching method from multimedia subsystem domain to circuit subsystem domain |
| CN1802022A (en) * | 2005-09-30 | 2006-07-12 | 华为技术有限公司 | Method and system for building initial call in continuity service of voice service |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1801998A (en) * | 2004-12-31 | 2006-07-12 | 华为技术有限公司 | Conversation switching method from multimedia subsystem domain to circuit subsystem domain |
| CN1802022A (en) * | 2005-09-30 | 2006-07-12 | 华为技术有限公司 | Method and system for building initial call in continuity service of voice service |
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