CN101127958B - Method for forward call in central control service of IP multimedia sub-system - Google Patents
Method for forward call in central control service of IP multimedia sub-system Download PDFInfo
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Abstract
The utility model relates to a method of the calling deflection in the integrated control business of IP multimedia subsystem, comprising a step S102, a step S104, a step S106, and a step S108, wherein, for the step S102, a piece of release message with the deflection information is transmitted to an L-CAAF-n by a called terminal, a deflection code is carried by the deflection information; For the step S104, a piece of non-structural complementary business data message is transmitted to an ICCF through a conversation control circuit by the L-CAAF-n, which is based on that the non-structural complimentary business data message with the deflection request is transmitted by the deflection information, wherein the deflection code is carried by the deflection request; for the step S106, the ICCF receives the non-structural complimentary business data and converts the deflection request in the non-structural complimentary business data into a piece of conversation initialization protocol message indicating the calling is moved out temporarily, and the message transmitted to a TAS; For the step S108, the calling deflection is performed by the TAS when the TAS receives the conversation initialization protocol message indicating the calling is moved out temporarily and transmitted by the ICCF.
Description
Technical field
The present invention relates to communication technical field, relate in particular to the method for carrying out Call Deflexion in a kind of IP Multimedia System centralized control business.
Background technology
Network interconnection agreement (Internet Protocol, be called for short IP) IP multimedia subsystem, IMS (IPMultimedia Core Network Subsystem, be called for short IMS) be by third generation partner program (3rd Generation Partnership Project, abbreviation 3GPP) a kind of IP-based network framework that proposes, it has made up an opening and service environment flexibly, support multimedia application, and provide abundant multimedia service for the user.
IMS is based on the communication network framework of IP, irrelevant with access technology, except being GPRS (General Packet Radio Service, be called for short GPRS), WLAN (wireless local area network) (Wireless Local Area Network, be called for short WLAN) etc. packet access network provide outside the business, can also be global system for mobile communications (Global System forMobile communications, be called for short GSM), unified mobile communcations system mobile cellular networks such as (UniversalMobile Telecommunications System are called for short UMTS) provides professional.
Mobile cellular network such as GSM, UMTS adopts circuit-switched technology, is called circuit (Circuit Switched is called for short CS) territory, and it can provide basic speech business and based on the supplementary service of speech business for the user.When IMS was inserted in the CS territory, it developed into a kind of access way, and promptly business provides by IMS is unified fully, and this technology is called IMS centralized traffic (IMS Centralized Service is called for short ICS).
The IMS centralized traffic has the following advantages: (1) IMS provides consistent business for access waies such as circuit domain, packet domain, and network enabled merges; (2) support the CS network to the evolution of IMS network; And (3) not only support to have ICS ability subscriber equipment, also supports the existing subscriber equipment that does not possess the ICS ability.
Fig. 1 is the Organization Chart of IMS centralized control business, comprises following network element: user terminal 101, be called for short UE (User Equipment); Adaption function entity 102 entities are inserted in the local circuit territory, are called for short L-CAAF-n (Local CS Access Adaptation Function-networkequivalent); Visited Mobile Switching Center 103 is called for short VMSC (Visited MobileSwitch Center); Home subscriber server 104 is called for short HSS (Home SubscriberServer); MGCF entity 105 is called for short MGCF (Media GatewayControl Function); Media gateway 106 is called for short MGW (Media Gateway); IMS circuit domain control function entity 107 is called for short ICCF (IMS CS ControlFunction); Call conversation control function entity 108 is called for short CSCF (Call SessionControl Function); And telecommunication application server 109, be called for short TAS (TelecomApplication Server).
UE 101 sets up 3 paths through the ICCF 107 in L-CAAF-n 102 to IMS territories: session control path, carrying control path and bearer path, wherein:
The session control path is carried on the CS territory, adopts unstructured supplementary service data (Unstructured Supplementary Service Data is called for short USSD), and this path is through L-CAAF-n 102, VMSC 103 and HSS 104;
Carrying control path UE 101 adopts the CS control signaling of standard to insert L-CAAF-n102, and is linked into the IMS territory by MGCF 105, arrives ICCF107 by CSCF 108; And
Bearer path is linked into the IMS territory by making UE 101 by L-CAAF-n 102 and MGW 106, and sets up medium with the remote user equipment of this session and be connected.
The IMS centralized traffic is utilized the interactive sessions control information between UE 101 and ICCF 107 of session control path, and sets up and the control media bearer by carrying control path, and ICCF107 serves as the IMS user agent, replaces subscriber equipment to insert the IMS territory.
In addition, can adopt TAS 109 to realize all kinds of telecommunication services.
The Call Deflexion business is to call out the called number B of the deflection business of having contracted as calling subscriber A, after the B ring, personal inclination according to user B, import a deflection number C, initiate a deflection business, user B tells switch with deflection information, initiates the calling to deflection number C by switch, thereby makes user A and deflection user C conversation.
Fig. 2 is the non-ICS user that the IMS customer call inserts from CS, realizes the flow chart of Call Deflexion from the user of CS access.Idiographic flow is as follows: 201, and CSCF receives called Session initiation Protocol (sessioninitiation protocol the is called for short SIP) conversation request message that Calling Side calling subscriber A initiates to called subscriber B; 202, CSCF is established to the calling of called subscriber B, the B ring according to user B number; 203, after the user terminal B ring, input deflection number C by release message, passes to VMSC via L-CAAF-n with deflection information; 204, VMSC finds that according to receiving release message the user has the deflection business, then carries out the Call Deflexion business; And 205, VMSC initiates a calling to deflection user C, and calling subscriber A and deflection user C are conversed.
From above flow process, the Call Deflexion business is the business that realizes in the CS territory, for the ICS business, the Call Deflexion business to realize in the IMS territory, obviously it seems and can't realize from top flow process.
Summary of the invention
Consider the problems referred to above and make the present invention that for this reason, main purpose of the present invention is to provide a kind of method of carrying out Call Deflexion in IP Multimedia System centralized control business.
This method may further comprise the steps: the release message that step S302, terminal called will have deflection information is sent to local circuit territory access adaption function entity, wherein, carries the deflection number in the deflection information; Step S304, the adaption function entity initiates to comprise the deflection request according to deflection information unstructured supplementary service data message is inserted in the local circuit territory, unstructured supplementary service data message is sent to IP Multimedia System circuit domain control function entity by the session control path, wherein, carry the deflection number in the deflection request; Step S306, IP Multimedia System circuit domain control function entity receives unstructured supplementary service data, and the deflection request in the unstructured supplementary service data is converted to expression calls out the conversation initialization protocol message temporarily shift out, and will represent that the conversation initialization protocol message that calling is temporarily shifted out is sent to telecommunication application server; And step S308, telecommunication application server is received after the conversation initialization protocol message that temporarily shifts out is called out in the expression that is sent by IP Multimedia System circuit domain control function entity and is carried out Call Deflexion.
Wherein, in step S304, the local circuit territory is inserted the adaption function entity and by the session control path unstructured supplementary service data message is sent to IP Multimedia System circuit domain control function entity.
In addition, in step S306, further comprise: step S306-2, after IP Multimedia System circuit domain control function entity is received unstructured supplementary service data, send expression by call conversation control function entity to telecommunication application server and call out the conversation initialization protocol message that temporarily shifts out; And step S306-4, telecommunication application server is carried out Call Deflexion, and the notice calling terminal changes before calling out, and telecommunication application server is to the foundation that makes a call of deflection number.
And further comprise in step S306-4: steps A 1, telecommunication application server notification call conversation control function entity are changeed before calling out; Steps A 2 is changeed before call conversation control function entity notice calling terminal is called out; Steps A 3, telecommunication application server is to the call setup of call conversation control function entity initiation to the deflection number; And steps A 4, call conversation control function entity is transmitted the call setup to the deflection number.
Wherein, in steps A 1, telecommunication application server changes before calling out by SIP 181 message informing call conversation control function entities.
In steps A 2, call conversation control function entity changes before calling out by SIP 181 message informing calling terminals.
In addition, after step S304, further comprise: step B discharges the local circuit territory and inserts bearing resource and the session of adaption function entity to IP Multimedia System circuit domain control function entity.
Particularly, in step B, the mode of releasing bearing resource and session comprises: after IP Multimedia System circuit domain control function entity is received the deflection request, the message that discharges session is sent to the local circuit territory inserts the adaption function entity; After IP Multimedia System circuit domain control function entity is received the deflection request, insert the adaption function entity to the local circuit territory and return acknowledge message, and the local circuit territory is inserted the adaption function entity message of releasing bearing resource is sent to IP Multimedia System circuit domain control function entity; And insert the adaption function entity after IP Multimedia System circuit domain control function entity sends the deflection request in the local circuit territory, after certain delay, insert the adaption function entity by the local circuit territory message of releasing bearing resource is sent to IP Multimedia System circuit domain control function entity.
Preferably, represent that calling out the conversation initialization protocol message that temporarily shifts out is SIP 302 message.
By technique scheme of the present invention, because when carrying out Call Deflexion, do not adopt original CS field technique in the message of CS, to carry the method for deflection information, but deflection information is passed to ICCF by session path, replace UE to realize the Call Deflexion business by ICCF, thereby realized that ICS Call Deflexion business controls in the IMS territory.
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 group-network construction schematic diagram of IP Multimedia System IMS centralized control business;
Fig. 2 is the existing signaling process figure that realizes the Call Deflexion business in the CS territory;
Fig. 3 is the flow chart that carries out the method for Call Deflexion according to of the present invention in IP Multimedia System centralized control business;
Fig. 4 is the concrete implementing procedure figure that carries out the method for Call Deflexion according to the present invention in ICS;
Fig. 5 is the flow chart that carries out the method for Call Deflexion in ICS of the example 1 according to the present invention;
Fig. 6 is the flow chart that carries out the method for Call Deflexion in ICS of the example 2 according to the present invention; And
Fig. 7 is the flow chart that carries out the method for Call Deflexion in ICS of the example 3 according to the present invention.
Embodiment
In the present invention, a kind of method of carrying out Call Deflexion in IP Multimedia System centralized control business is provided, wherein, deflection business information with called subscriber's execution, reach L-CAAF-n by the called subscriber by release message, again by L-CAAF-n by the session control path, use USSD message to be carried to ICCF, replace UE to the IMS territory deflection business that makes a call by ICCF.Describe this method below with reference to accompanying drawings in detail.
Fig. 3 is the flow chart that carries out the method for Call Deflexion according to of the present invention in IP Multimedia System centralized control business.
With reference to Fig. 3, this method may further comprise the steps: step S302, and the release message that terminal called will have deflection information is sent to L-CAAF-n, wherein, carries the deflection number in the deflection information; Step S304, L-CAAF-n initiates to comprise the unstructured supplementary service data message of deflection request according to deflection information, and unstructured supplementary service data message is sent to ICCF by the session control path, wherein, carries the deflection number in the deflection request; Step S306, ICCF receives unstructured supplementary service data, and the deflection request in the unstructured supplementary service data is converted to expression calls out the conversation initialization protocol message temporarily shift out, and will represent that the conversation initialization protocol message that calling is temporarily shifted out is sent to TAS; And step S308, TAS receives after the conversation initialization protocol message that temporarily shifts out is called out in the expression that is sent by ICCF and carries out Call Deflexion.
Wherein, in step S304, L-CAAF-n is sent to ICCF by the session control path with unstructured supplementary service data message.
In addition, in step S306, further comprise: step S306-2 after ICCF receives unstructured supplementary service data, sends expression by CSCF to TAS and calls out the conversation initialization protocol message that temporarily shifts out; And step S306-4, TAS carries out Call Deflexion, and the notice calling terminal changes before calling out, and TAS is to the foundation that makes a call of deflection number.
And, in step S306-4, further comprise: steps A 1, before calling out, changes TAS notice CSCF; Steps A 2 is changeed before CSCF notice calling terminal is called out; Steps A 3, TAS is to the call setup of CSCF initiation to the deflection number; And steps A 4, CSCF transmits the call setup to the deflection number.
Wherein, in steps A 1, TAS changes before calling out by SIP 181 message informing CSCF.
In steps A 2, CSCF changes before calling out by SIP 181 message informing calling terminals.
In addition, after step S304, further comprise: step B discharges bearing resource and the session of L-CAAF-n to ICCF.
Particularly, in step B, the mode of releasing bearing resource and session comprises:
(1) after ICCF receives the deflection request, the message that discharges session is sent to L-CAAF-n;
(2) after ICCF receives the deflection request, return acknowledge message, and L-CAAF-n is sent to ICCF with the message of releasing bearing resource to L-CAAF-n; And
(3) at L-CAAF-n after ICCF sends the deflection request, after certain delay, the message of releasing bearing resource is sent to ICCF (these three kinds of modes will specifically describe in the back) by L-CAAF-n.
Preferably, represent that calling out the conversation initialization protocol message that temporarily shifts out is SIP 302 message.
Fig. 4 is the concrete implementing procedure figure that carries out the method for Call Deflexion according to the present invention in ICS.
With reference to Fig. 4, this method comprises: step S402, after CSCF is receiving the call request that calling terminal sends over, by TAS, ICCF, MGCF, VMSC and L-CAAF-n to the terminal called foundation that makes a call, dialed terminal bell; Step S404, to terminal called input deflection number, that is, the number of the terminal that deflect into by release message, will comprise that the deflection information of above-mentioned deflection number is delivered to L-CAAF-n to the called subscriber according to the personal inclination; Step S406, L-CAAF-n initiate USSD message according to the deflection information among the step S404, and deflection information is passed to ICCF; Can but be not limited to transmit described deflection request by the session control path; Can but be not limited to transmit described deflection request by USSD; At least carry the deflection number in the described deflection information; And step S408, ICCF handles described deflection request, changes the deflection request into expression and calls out the sip message that temporarily shifts out, and for example, can be SIP 302 response messages, and this message is transmitted to TAS by CSCF; TAS carries out Call Deflexion.
The present invention transmits deflection information to VMSC, but the Call Deflexion business information is delivered to the IMS territory by the session control path USSD in the ICS called service when carrying out the deflection business, by the TAS execution Call Deflexion in IMS territory.
In above-mentioned Call Deflexion method, step S408 can specifically may further comprise the steps: after step S408-2, ICCF obtain described deflection request, replace terminal called to initiate deflection, at first by CSCF to SIP 302 response messages of TAS loopback, the expression Call Deflexion; And step S408-4, TAS carries out Call Deflexion, before calling out, changes the notice Calling Side, and to the foundation that makes a call of deflection number.
Wherein, step S408-4 can comprise before following processing: TAS just calls out with SIP 181 message informing CSCF changes; CSCF changes before just calling out with SIP 181 message informing calling terminals; TAS to CSCF to the foundation that makes a call of deflection number; And CSCF transmits the call setup to deflection number C.
Just realized Call Deflexion after the call setup.
The method of carrying out Call Deflexion among the described ICS can also comprise the step S410 parallel with step S408: discharge bearing resource and the session of L-CAAF-n to ICCF, also can be said to is to discharge bearing resource and the session of ICCF to L-CAAF-n.
Discharge L-CAAF-n among the above-mentioned steps B neutralization procedure S410 and comprise following three kinds at least to the bearing resource of ICCF and the mode of session:
(1) after ICCF receives the deflection request, initiate to discharge conversation message by ICCF, arrive L-CAAF-n by CSCF, MGCF and VMSC, thereby discharge bearing resource and the session of L-CAAF-n to ICCF.Specific practice is: ICCF to the cancellation message that MGCF sends SIP, goes to discharge the session of ICCF to MGCF by CSCF; MGCF cancels the release message that message changes ISUP (ISUP) into SIP and passes to VMSC, discharges the bearing resource of MGCF to VMSC; VMSC sends out release message to L-CAAF-n, discharges the bearing resource of VMSC to L-CAAF-n.
(2) after ICCF receives the deflection request, return acknowledge message, initiate releasing bearing resource message, arrive ICCF, thereby discharge bearing resource and the session of L-CAAF-n to ICCF by VMSC, MGCF, CSCF by L-CAAF-n to L-CAAF-n.Specific practice is: ICCF handles the Call Deflexion request receive, sends out the affirmation message of USSD by USSD session control path, and notice L-CAAF-n can discharge bearing resource and the session of ICCF to terminal called; L-CAAF-n sends out release message to VMSC, discharges the bearing resource of L-CAAF-n to VMSC; VMSC sends out the ISUP release message to called MGCF, discharges the bearing resource of VMSC to MGCF; MGCF to the cancellation message that ICCF sends out SIP, discharges the session of MGCF to ICCF by CSCF.
(3) when L-CAAF-n after ICCF transmits the deflection request, through initiating releasing bearing resource message by L-CAAF-n after one section time-delay, arrives ICCF, thereby release L-CAAF-n is to bearing resource and the session of ICCF by VMSC, MGCF, CSCF.Specific practice is: L-CAAF-n sends out release message through L-CAAF-n after one section time-delay to VMSC after sending out the Call Deflexion request to ICCF, discharges the bearing resource of L-CAAF-n to VMSC; VMSC sends out the ISUP release message to called MGCF, discharges the bearing resource of VMSC to MGCF; MGCF to the cancellation message that ICCF sends out SIP, discharges the session of MGCF to ICCF by CSCF.
The system that carries out Call Deflexion according to the ICS user of the embodiment of the invention comprises calling terminal, terminal called, L-CAAF-n, VMSC, MGCF, ICCF, CSCF and TAS.
Wherein, CSCF is used to receive the call request of calling terminal, and by TAS, ICCF, MGCF, VMSC and L-CAAF-n to the terminal called foundation that makes a call; Also being used to receive changes before the notice calling terminal is just called out after SIP 181 message of TAS; And receive TAS to the deflection number make a call set up after, transmit call setup to the deflection terminal.
Terminal called is used for after ring, initiates the deflection request according to the deflection number of user's input, and deflection information is passed to L-CAAF-n by release message.
L-CAAF-n is used to receive the release message that has deflection information that terminal called sends, and initiates USSD message, and the deflection information that receives is delivered to ICCF by USSD message by the session control path; Can but be not limited to transmit described deflection request by the session control path; Can but be not limited to transmit described deflection request by USSD; At least carry the deflection number in the described deflection request.
ICCF is used to handle the deflection request that L-CAAF-n transmits, and changes described deflection request into sip message that the expression calling is temporarily shifted out, as SIP 302 response messages, then this message is transmitted to TAS by CSCF.
TAS is used to receive the expression that ICCF sends and calls out the sip message that temporarily shifts out, and after receiving described sip message, change before just calling out with SIP 181 message informing CSCF, and to CSCF to the foundation that makes a call of deflection number.
Describe the present invention in detail below in conjunction with instantiation.
Fig. 5 to Fig. 7 is the signaling process figure according to three instantiations of the present invention.Wherein, set up an ICS called service when a calling terminal A calls out called ICS terminal B, after the ICS terminal B ring, initiate a deflection business according to user's demand, the deflection number is C.
Three examples have adopted the method for above-mentioned 3 kinds of different release L-CAAF-n to ICCF bearing resource and session respectively, this is in order to solve when called user terminal B is carrying out the deflection business operation, if the release message of called user terminal arrives first ICCF than the deflection message that USSD carries, can make whole calling to be moved to end, thereby can not carry out the problem of deflection business.
These three examples will be described respectively below.
Example 1
In this example, discharging ICCF is after ICCF receives the deflection business information to the bearing resource of L-CAAF-n and the mode of session, is initiated to discharge flow process by ICCF, and concrete steps as shown in Figure 5.
With reference to Fig. 5, the processing procedure of this example is as follows:
Step 501, CSCF receives the called SIP conversation request message that Calling Side calling terminal A initiates to terminal called B;
Step 502, CSCF is established to the calling of terminal called B according to terminal called B number, terminal called B ring;
Step 503, terminal called B initiates release message, carries deflection information simultaneously to L-CAAF-n;
Step 504 sends USSD by L-CAAF-n, carries Call Deflexion information, and process VMSC and HSS are to ICCF, and this message should be carried the deflection number at least;
Step 505 to step 507 is the flow process of release L-CAAF-n to ICCF bearing resource and session; Step 508 and 509 is carried out the flow process of Call Deflexion for ICCF replaces terminal to the IMS territory, and wherein, these two flow processs walk abreast, and all begin to carry out after step 504;
Step 505, ICCF handles the Call Deflexion request of receiving, by the cancellation message of CSCF to MGCF transmission SIP, goes to discharge the session of ICCF to MGCF immediately;
Step 507, VMSC sends out release message to L-CAAF-n, discharges the bearing resource of VMSC to L-CAAF-n, and so far, release L-CAAF-n finishes to the flow process of ICCF bearing resource and session;
Step 508, after step 504, ICCF resolves 404 deflection requests, constructs corresponding sip message, and sends to TAS by CSCF, carries user C number in the message, requires TAS to finish the deflection business; And
Step 509, TAS carries out the Call Deflexion business, and so far, the flow process that ICCF replaces terminal to carry out Call Deflexion to the IMS territory finishes.
Wherein, step 509 specifically is refined as step 510 to step 513: step 510, and TAS changes before just calling out with SIP 181 message informing CSCF; Step 511, CSCF changes before just calling out with SIP181 message informing calling terminal A; Step 512, TAS to CSCF to the deflection number C foundation that makes a call; And step 513, CSCF transmits the call setup that deflection number C is initiated.
Example 2
In this example, discharging ICCF is after ICCF receives the deflection business information to the bearing resource of L-CAAF-n and the mode of session, return an acknowledge message to L-CAAF-n, discharge bearing resource and the session of ICCF to L-CAAF-n by L-CAAF-n, concrete steps as shown in Figure 6.
With reference to Fig. 6, the concrete processing in this example is as follows:
Step 601, CSCF receives the called SIP conversation request message that Calling Side calling terminal A initiates to terminal called B;
Step 602, CSCF is established to the calling of terminal called B according to terminal called B number, terminal called B ring;
Step 603, terminal called B sends the release message of belt deflector number to L-CAAF-n;
Step 604 is initiated USSD message by L-CAAF-n, carries Call Deflexion information, delivers to ICCF via the session control path, and this message should be carried the deflection number at least;
Step 605, ICCF handles the Call Deflexion request receive, sends out the affirmation message of USSD by the USSD session control path in the step 604, and notice L-CAAF-n can discharge bearing resource and the session of ICCF to L-CAAF-n;
Step 606, L-CAAF-n sends out release message (not belt deflector number) to VMSC, discharges the bearing resource of L-CAAF-n to VMSC;
Step 608, MGCF to the cancellation message that ICCF sends out SIP, discharges the session of MGCF to ICCF by CSCF; So far, L-CAAF-n finishes to release of ICCF bearing resource and session;
Step 609, step 604 back ICCF handle receive the Call Deflexion request in, ICCF also by CSCF to TAS loopback SIP 302 response messages, expression is called out and is temporarily shifted out; And
Step 610, TAS carries out the Call Deflexion business; So far, Call Deflexion is finished.
Wherein, step 605 is parallel to the flow process of step 610 to the flow process and the step 609 of step 608;
Wherein, step 610 can specifically be refined as step 611 again and arrive step 614: step 611, and TAS changes before just calling out with SIP 181 message informing CSCF; Step 612, CSCF changes before just calling out with SIP181 message informing calling terminal A; Step 613, TAS to CSCF to the deflection number C foundation that makes a call; And step 614, CSCF is to deflecting into the number C foundation that makes a call.
Example 3
In this example, release ICCF is after L-CAAF-n receives the deflection business information that is sent by terminal called B to bearing resource and the session of L-CAAF-n, discharge bearing resource and the session of L-CAAF-n to ICCF through one section time-delay by L-CAAF-n, concrete steps as shown in Figure 7.
With reference to Fig. 7, the processing in this example is specific as follows:
Step 701, CSCF receives the called SIP conversation request message that Calling Side calling terminal A initiates to terminal called B;
Step 702, CSCF is established to the calling of terminal called B according to terminal called B number, terminal called B ring;
Step 703, terminal called B initiates release message, carries deflection information to L-CAAF-n;
Step 704, L-CAAF-n initiates USSD message, carries Call Deflexion information, to ICCF, wherein comprises the deflection number through the session control path at least;
Step 705, after ICCF handled and receives the Call Deflexion request, to TAS loopback SIP 302 response messages, called out and temporarily shift out by expression by CSCF for ICCF; And
Step 706, TAS carries out the Call Deflexion business; So far, Call Deflexion is finished.
Step 706 can specifically be refined as step 707 again to step 711: step 707, and TAS changes before just calling out with SIP 181 notice CSCF; Step 708, CSCF changes before just calling out with SIP 181 subscriber call A; Step 709, TAS to CSCF to the deflection number C foundation that makes a call; Step 710, CSCF is to the deflection number C foundation that makes a call; And step 711, after sending out the Call Deflexion request, send out release message (not belt deflector number) to VMSC through one section time-delay L-CAAF-n to ICCF, discharge the bearing resource of L-CAAF-n to VMSC.
Step 713, MGCF to the cancellation message that ICCF sends out SIP, discharges the session of MGCF to ICCF by CSCF; So far, L-CAAF-n finishes to ICCF bearing resource and session release.
Wherein, step 705 is parallel to the flow process of step 713 to the flow process and the step 711 of step 706.
In sum, by means of technical scheme of the present invention, realized the Call Deflexion business of ICS UE.
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 (8)
1. a method of carrying out Call Deflexion in IP Multimedia System centralized control business is characterized in that, comprising:
The release message that step S302, terminal called will have deflection information is sent to local circuit territory access adaption function entity, wherein, carries the deflection number in the described deflection information;
Step S304, the adaption function entity initiates to comprise the deflection request according to described deflection information unstructured supplementary service data message is inserted in described local circuit territory, described unstructured supplementary service data message is sent to IP Multimedia System circuit domain control function entity by the session control path, wherein, carry described deflection number in the described deflection request;
Step S306, described IP Multimedia System circuit domain control function entity receives described unstructured supplementary service data message, and the described deflection request in the described unstructured supplementary service data message is converted to expression calls out the conversation initialization protocol message temporarily shift out, and the conversation initialization protocol message that temporarily shifts out is called out in described expression be sent to telecommunication application server; And
Step S308, described telecommunication application server receive after the conversation initialization protocol message that temporarily shifts out is called out in the described expression that is sent by described IP Multimedia System circuit domain control function entity and carry out Call Deflexion.
2. method according to claim 1 is characterized in that,
In described step S306, further comprise: step S306-2, after described IP Multimedia System circuit domain control function entity is received described unstructured supplementary service data message, send described expression by call conversation control function entity to described telecommunication application server and call out the conversation initialization protocol message that temporarily shifts out; And
In described step S308, further comprise: step S308-2, described telecommunication application server is carried out described Call Deflexion, and changes before the notice calling terminal described calling, and described telecommunication application server is to the foundation that makes a call of described deflection number.
3. method according to claim 2 is characterized in that, in described step S308-2, further comprises:
Steps A 1, described telecommunication application server are changeed before notifying the described calling of described call conversation control function entity;
Steps A 2, described call conversation control function entity are changeed before notifying the described calling of described calling terminal;
Steps A 3, described telecommunication application server is to the described call setup of described call conversation control function entity initiation to described deflection number; And
Steps A 4, described call conversation control function entity is transmitted the described call setup to described deflection number.
4. method according to claim 3 is characterized in that, in described steps A 1, described telecommunication application server changes by the described calling of the described call conversation control function entity of SIP 181 message informings is preceding.
5. method according to claim 3 is characterized in that, in described steps A 2, described call conversation control function entity changes by the described calling of the described calling terminal of SIP 181 message informings is preceding.
6. according to each described method in the claim 1 to 5, it is characterized in that, after described step S304, further comprise:
Step B discharges described local circuit territory and inserts bearing resource and the session of adaption function entity to described IP Multimedia System circuit domain control function entity.
7. method according to claim 6 is characterized in that, in described step B, it is one of following that the mode that discharges described bearing resource and described session comprises:
After described IP Multimedia System circuit domain control function entity is received described deflection request, the message that discharges described session is sent to described local circuit territory inserts the adaption function entity;
After described IP Multimedia System circuit domain control function entity is received described deflection request, insert the adaption function entity to described local circuit territory and return acknowledge message, and described local circuit territory is inserted the message that the adaption function entity will discharge described bearing resource and is sent to described IP Multimedia System circuit domain control function entity; And
Insert the adaption function entity after described IP Multimedia System circuit domain control function entity sends described deflection request in described local circuit territory, after certain delay, the message that will be discharged described bearing resource by described local circuit territory access adaption function entity is sent to described IP Multimedia System circuit domain control function entity.
8. according to each described method in the claim 1 to 5, it is SIP 302 message that the conversation initialization protocol message that temporarily shifts out is called out in described expression.
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| CN2007101518766A CN101127958B (en) | 2007-09-25 | 2007-09-25 | Method for forward call in central control service of IP multimedia sub-system |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1411225A (en) * | 2001-09-29 | 2003-04-16 | 华为技术有限公司 | Realizing method of calling forwarding |
| CN1925525A (en) * | 2005-09-01 | 2007-03-07 | 华为技术有限公司 | Method for realizing bridged collection of IP multimedia subsystem |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1411225A (en) * | 2001-09-29 | 2003-04-16 | 华为技术有限公司 | Realizing method of calling forwarding |
| CN1925525A (en) * | 2005-09-01 | 2007-03-07 | 华为技术有限公司 | Method for realizing bridged collection of IP multimedia subsystem |
Non-Patent Citations (1)
| Title |
|---|
| 3GPP.IP Multimedia System (IMS) centralized services (Release 8).《3GPP TR 23.892 V1.0.0》.2007,全文. * |
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