CN101360270B - Customer closedown forwarding method for IP multimedia subsystem centralized service - Google Patents
Customer closedown forwarding method for IP multimedia subsystem centralized service Download PDFInfo
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Abstract
The invention relates to a method of transfer before user shutdown of IP multimedia subsystem concentrated business, which comprises: firstly, an ICCF unit sends converted called request message to a visit mobile switching centre, the visit mobile switching centre finds a called user shutdown, the visit mobile switching centre sends mobile application part error response messages to the ICCF unit, and the mobile application part error response messages carry called user shutdown cause value; then the ICCF unit maps the mobile application part error response messages to session initiation protocol response messages, the session initiation protocol response messages carry the called user shutdown cause value, and the session initiation protocol response messages are transferred to a telecommunications application server; at last, the telecommunications application server controls trigger of business transfer before shutdown according to the called user shutdown cause value carried by the session initiation protocol response messages. In addition, judgement on whether shutdown is needed or not can be carried on a home user server. When the invention is applied, IMS domain does not need to obtain shutdown state of ICS UE as CS is accessed, and the realization of the business transfer before user shutdown of an IMS concentrated business terminal is completed.
Description
Technical field
The present invention relates to the communications field, relate more specifically to the method for changeing before a kind of IP Multimedia System centralized traffic user shuts down.
Background technology
IP (procotol; Internet Protocol is called for short IP) IP multimedia subsystem, IMS (IP Multimedia Core Network Subsystem is called for short IMS) is 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, supports multimedia application, and abundant multimedia service is provided for the user.
IMS is based on the communication network framework of IP; Irrelevant with access technology; Except dividing into groups to exchange (Packet Switched for GPRS (General Packet Radio Service, GPRS), WLAN (Wireless Local Area Network, WLAN) etc.; Abbreviation PS) access network provides outside the business; Can also provide professional for GSM (Global System for Mobile communications, global system for mobile communications), UMTS mobile cellular networks such as (Universal Mobile Telecommunications System, unified mobile communcations systems).
Mobile cellular network such as GSM, UMTS adopts circuit-switched technology, is called circuit switching (Circuit Switched is called for short CS) territory, can basic speech business be provided for the user, and based on the supplementary service of speech business.When IMS was inserted in the CS territory, it developed into a kind of access way, and 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 is that access waies such as circuit commutative field, packet-switched domain provide consistent business, and network enabled merges;
(2) support the CS network to the evolution of IMS network;
(3) not only support to have ICS ability subscriber equipment, also support the existing subscriber equipment that does not possess the ICS ability.
Fig. 1 is an IMS centralized traffic application scenarios session path sketch map; Comprising following network element: user terminal 101 (User Equipment; Abbreviation UE), Visited Mobile Switching Center 102 (Visited Mobile Switch Center; Abbreviation VMSC), home subscriber server 103 (Home Subscriber Server is called for short HSS), MGCF unit 104 (Media Gateway Control Function is called for short the MGCF unit), WMG 105 (MediaGateway; Be called for short MGW), IMS circuit domain control function unit 106 (IMS CS Control Function is called for short the ICCF unit),
CSCF unit 107 (Call Session Control Function is called for short the CSCF unit)
With telecommunication application server 108 (Telecom Application Server is called for short TAS)
Three paths are set up in the ICCF unit 106 in UE 101 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 VMSC102 and HSS 103.
Carry control path UE 101 and adopt the CS control signaling of standard to insert VMSC 102, and be linked into IMS, arrive ICCF unit 106 through CSCF unit 107 through MGCF unit 104.
Bearer path is linked into IMS through being UE 101 through VMSC 102 and MGW 105, 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 unit 106 of session control path, and the control path is set up and the control media bearer through carrying, and ICCF unit 106 serves as the IMS user agent, replaces subscriber equipment to insert IMS.
TAS108 is a telecommunication application server among the IMS, and the basic service of telecommunications realizes in TAS.
Set up the ICS called service with regard to ICS UE at present and have dual mode: a kind of is when the called request of initiating from Calling Side arrives the ICCF unit; The ICCF unit distributes an ICCF address; Give called number through session control path USSD with the ICCF address strap, initiate the caller process by called number ICS UE and set up the carrying that is called into the ICCF unit.Another kind of mode is the roaming number that the ICCF unit obtains called number, and the ICCF unit relies on the roaming number route to be established to the ICCF unit to called carrying.
Fig. 2 is existing two kinds of dual modes of setting up the ICS called service.
201, CSCF receives the unit the called requested service that Calling Side is initiated;
202, the CSCF unit through behind the TAS, is forwarded to ICCF unit with called request according to initial filter standard or norm;
203, the ICCF unit sends to terminal called with the called request message of USSD on the session control path, and this session control path arrives called UE through HSS and VMSC;
Set up the ICCF unit and arrive called UE called flow mode one:
A1, called UE is initiated a caller process to VMSC to the ICCF address;
A2, VMSC initiate integrated digital service-user part signaling (ISDN User Part is called for short ISUP) initial address message to the MGCF unit through ICCF address route;
A3, MGCF cell translation ISUP initial address message through ICCF address route, is initiated the conversation request message of SIP (Session Initiation Protocol, session initiation protocol), arrives the ICCF unit through the CSCF unit;
Set up the ICCF unit and arrive called UE called flow mode two:
B1, the ICCF unit obtains the roaming number of called number;
B2, the ICCF unit is sent out the SIP conversation request and is arrived the MGCF unit through the CSCF unit through the roaming number route;
B3, the initial address message that the MGCF unit converts the SIP conversation request into ISUP is to VMSC;
B4, VMSC make a call and are established to called UE, and the paging called UE;
Can both set up the called flow of ICS UE through above-mentioned dual mode.
Mobile subscriber's forward-shifting service that shuts down is meant: when the contracted user of user C of called subscriber B shuts down behind the forward-shifting service, user B shutdown is closed machine information and is kept in the VLR Visitor Location Register (VLR); As calling subscriber A calling B, critical point exchange (GMSC) is initiated route requests to attaching position register (HLR), and HLR initiates the roaming number request to VLR; VLR finds user's shutdown; Then tell HLR can not ask roaming number, user's shutdown, the pass machine information that HLR receives is handed down to GMSC with Redirection Information; GMSC is initiated to the calling of forwarding subscriber C according to the Redirection Information of receiving.
VLR judges that the situation of mobile subscriber's shutdown has two kinds of situation in addition: the one, and user's normal shutdown, notice VLR; The 2nd, user's inertia, VLR is changed to off-mode through timer with state of user.
In the prior art; (the Communication Forwarding Not Logged-in of the unregistered forward-shifting service of user in the IMS territory; Be called for short CFNL) be in AS (Application Server, application server), to carry out to handle, this needs the CSCF unit to know the login state at IMS terminal; Through third-party registration notice AS, carry out forward-shifting service by AS.And in existing IMS centralized control business; ICS UE off-mode is not also known in the IMS territory; Particularly VLR is difficult to the situation that the inertia user is changed to off-mode to solve, and therefore control also is very difficult to realize in the IMS territory through changeing before the shutdown of existing techniques in realizing CS service-user.
Summary of the invention
Technical problem to be solved by this invention provides the method for changeing before a kind of IP Multimedia System centralized traffic user shuts down, and having realized changes the control in the IMS territory before the shutdown of CS service-user.
In order to address the above problem, the invention provides the method for changeing before a kind of IP Multimedia System centralized traffic user shuts down, may further comprise the steps,
Called request message after a, IP Multimedia System circuit domain control function unit will be changed is sent to Visited Mobile Switching Center, and wherein, the called request message after the said conversion is the called request message of unstructured supplementary service data;
B, Visited Mobile Switching Center find called subscriber's shutdown, send the MAP error response message to IP Multimedia System circuit domain control function unit, and said MAP error response message is carried called subscriber's cause value that shuts down;
C, IP Multimedia System circuit domain control function unit are mapped as the session initiation protocol response message with said MAP error response message; Said session initiation protocol response message carries called subscriber's cause value that shuts down, and said session initiation protocol response message is passed to telecommunication application server; The shut down triggering of cause value control shutdown forward-shifting service of the called subscriber that telecommunication application server carries according to said session initiation protocol response message.
Further, said method also can comprise, also comprise among the said step a,
After the CSCF unit receives the called request message of Calling Side, according to initial filter standard or norm with said called request message through telecommunication application server, be sent to said ' IP multimedia subsystem, IMS circuit domain control function unit.
Further; Said method also can comprise; Among the said step a; Said IP Multimedia System circuit domain control function unit converts called request message into unstructured supplementary service data called request message, and the called request message of said unstructured supplementary service data is sent to Visited Mobile Switching Center through home subscriber server.
Further, said method can comprise that also said called request message carries said called number information.
Further, said method also can comprise, among the said step b, Visited Mobile Switching Center is according to the called subscriber's of the storage of VLR Visitor Location Register state, promptly according to called number to the called user terminal distributing paging, find called subscriber's shutdown.
Further, said method can comprise that also among the said step b, said Visited Mobile Switching Center sends the MAP error response message to IP Multimedia System circuit domain control function unit on the session control path.
Further, said method also can comprise, the said user cause value that shuts down comprises the absent subscriber.
Further, said method can comprise that also among the said step c, said session initiation protocol response message is session initiation protocol 503 message, expression user shutdown.
Further, said method can comprise that also among the said step c, said IP Multimedia System circuit domain control function unit is delivered to telecommunication application server with said session initiation protocol response message through the CSCF unit; The shut down triggering of cause value control shutdown forward-shifting service of the called subscriber that telecommunication application server carries according to said session initiation protocol response message.
The method of changeing before the present invention also provides other a kind of IP Multimedia System centralized traffic user to shut down,, may further comprise the steps,
Called request message after a1, IP Multimedia System circuit domain control function unit will be changed is sent to home subscriber server, and wherein, the called request message after the said conversion is the called request message of unstructured supplementary service data;
B1, home subscriber server find called subscriber's shutdown, send the MAP error response message to IP Multimedia System circuit domain control function unit, and said MAP error response message is carried called subscriber's cause value that shuts down;
C1, IP Multimedia System circuit domain control function unit are mapped as the session initiation protocol response message with said MAP error response message; Said session initiation protocol response message carries called subscriber's cause value that shuts down, and said session initiation protocol response message is passed to telecommunication application server; The shut down triggering of cause value control shutdown forward-shifting service of the called subscriber that telecommunication application server carries according to said session initiation protocol response message.
Further; Also comprise among the said step a1; After the CSCF unit receives the called request message of Calling Side, with said called request message process telecommunication application server, be sent to said IP Multimedia System circuit domain control function unit according to initial filter standard or norm.
Further; Among the said step a1; Said IP Multimedia System circuit domain control function unit converts called request message into unstructured supplementary service data called request message, and the called request message of said unstructured supplementary service data is sent to home subscriber server.
Further, among the said step b1, said home subscriber server sends the MAP error response message to IP Multimedia System circuit domain control function unit on the session control path.
Further, it is characterized in that the said user cause value that shuts down comprises the absent subscriber.
Further, it is characterized in that among the said step c1, said session initiation protocol response message is session initiation protocol 503 message, expression user shutdown.
Further, it is characterized in that among the said step c1, said IP Multimedia System circuit domain control function unit is delivered to telecommunication application server with said session initiation protocol response message through the CSCF unit; The shut down triggering of cause value control shutdown forward-shifting service of the called subscriber that telecommunication application server carries according to said session initiation protocol response message.
Compared with prior art, use the present invention, the IMS territory need not obtain the off-mode of ICS UE when CS inserts, the user who the has accomplished IMS centralized traffic terminal realization of forward-shifting service of shutting down.
Description of drawings
Fig. 1 is an existing IMS centralized service application scene session path sketch map;
Fig. 2 is the flow chart that changes before the ICS business realizing user of prior art shuts down;
Fig. 3 is the flow chart embodiment one of the method for commentaries on classics before IP Multimedia System centralized traffic user shuts down in the specific embodiment of the invention.
Fig. 4 is the flow chart embodiment two of the method for commentaries on classics before IP Multimedia System centralized traffic user shuts down in the specific embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the invention is described further.
In the specific embodiment of the invention, after called request message sent to the CSCF unit, the CSCF unit sent to ICCF unit with called request message through TAS according to initial filter standard or norm; The called request message of ICCF cell translation is the called request message of USSD, and said called request message carries called number information, and the called request message of USSD is sent to VMSC through HSS; When if the called request message of USSD is sent to HSS; HSS finds user's shutdown; There is HSS will carry the shut down MAP error response message of reason of user and passes to the ICCF unit; Or the called request message of USSD has arrived VMSC, and VMSC finds user's shutdown, and VMSC will carry shut down MAP (MAP) error response message of cause value of user and pass to the ICCF unit in the session control path; The ICCF unit is mapped as it and carries the shut down sip response message of cause value of user, passes to TAS, and the user who is carried according to sip response message by the TAS cause value that shuts down triggers user's preceding commentaries on classics of shutting down.
Fig. 3 has described the flow implementation example one of the method for changeing before a kind of IP Multimedia System centralized traffic user shuts down in the specific embodiment of the invention, may further comprise the steps,
Step 301, CSCF unit receive the called request message of Calling Side;
Step 302, the CSCF unit through telecommunication application server, is sent to IMS circuit domain control function unit with called request message;
The CSCF unit with called request message process telecommunication application server, is sent to IMS circuit domain control function unit according to initial filter standard or norm.
Step 303, the called request message after IMS circuit domain control function unit will be changed is sent to Visited Mobile Switching Center;
The called request message of IMS circuit domain control function cell translation is the called request message of USSD (unstructured supplementary service data); Said called request message carries called number information and ICCF information, and the called request message of USSD is sent to Visited Mobile Switching Center through home subscriber server.
Step 304, Visited Mobile Switching Center are found called subscriber's shutdown according to the called subscriber's of the storage of VLR Visitor Location Register state;
Step 305 is sent the MAP error response message to IMS circuit domain control function unit, and said MAP error response message is carried the shutdown cause value;
Visited Mobile Switching Center sends the MAP error response message to IMS circuit domain control function unit on the session control path, said MAP error response message is carried user's cause value that shuts down.
The shut down error reason of cause value indication user shutdown of said user can be the absent subscriber.
Step 306; IMS circuit domain control function unit is mapped as the session initiation protocol response message with said MAP error response message; Said session initiation protocol response message carries user's cause value that shuts down, and said session initiation protocol response message is passed to telecommunication application server;
IMS circuit domain control function unit is mapped as the session initiation protocol response message with said MAP error response message; Expression user shutdown; Said session initiation protocol response message carries user's cause value that shuts down, and through the CSCF unit session initiation protocol response message is passed to telecommunication application server.
Said session initiation protocol response message can be session initiation protocol 503 message, expression user shutdown.
Step 307, the shut down triggering of cause value control shutdown forward-shifting service of the user that telecommunication application server carries according to said session initiation protocol response message.
In some cases, when user's long-term immobilization, VLR is regarded as shutdown, through this user data of back VLR deletion after a while, and notifies this user of HSS to shut down.
Fig. 4 has described the flow implementation example two of the method for changeing before a kind of IP Multimedia System centralized traffic user shuts down in the specific embodiment of the invention, in this example, is to judge user's shutdown by HSS, may further comprise the steps:
Step 401, CSCF unit receive the called request message of Calling Side;
Step 402, the CSCF unit through telecommunication application server, is sent to IMS circuit domain control function unit with called request message;
The CSCF unit with called request message process telecommunication application server, is sent to IMS circuit domain control function unit according to initial filter standard or norm.
Step 403, the called request message after IMS circuit domain control function unit will be changed is sent to home subscriber server;
The called request message of IMS circuit domain control function cell translation is the called request message of USSD (unstructured supplementary service data); Said called request message carries called number information and ICCF information, and the called request message of USSD is sent to home subscriber server.
Step 404, home subscriber server are found called subscriber's shutdown;
Home subscriber server sends the MAP error response message to IMS circuit domain control function unit on the session control path, said MAP error response message is carried user's cause value that shuts down.
The shut down error reason of cause value indication user shutdown of said user can be the absent subscriber.
IMS circuit domain control function unit is mapped as the session initiation protocol response message with said MAP error response message; Expression user shutdown; Said session initiation protocol response message carries user's cause value that shuts down, and through the CSCF unit session initiation protocol response message is passed to telecommunication application server.
Said session initiation protocol response message can be session initiation protocol 503 message, expression user shutdown.
Step 407, the shut down triggering of cause value control shutdown forward-shifting service of the user that telecommunication application server carries according to said session initiation protocol response message.
The said method of the specific embodiment of the invention is not obtain the off-mode of ICS UE when CS inserts in the IMS territory, the user who the has accomplished IMS centralized traffic terminal forward-shifting service that shuts down.
The above; Be merely the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with this technological people in the technical scope that the present invention disclosed; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (15)
1. the method for changeing before an IP Multimedia System centralized traffic user shuts down is characterized in that, may further comprise the steps,
Called request message after a, IP Multimedia System circuit domain control function unit will be changed is sent to Visited Mobile Switching Center, and wherein, the called request message after the said conversion is the called request message of unstructured supplementary service data;
B, Visited Mobile Switching Center find called subscriber's shutdown, send the MAP error response message to IP Multimedia System circuit domain control function unit, and said MAP error response message is carried called subscriber's cause value that shuts down;
C, IP Multimedia System circuit domain control function unit are mapped as the session initiation protocol response message with said MAP error response message; Said session initiation protocol response message carries called subscriber's cause value that shuts down, and said session initiation protocol response message is passed to telecommunication application server; The shut down triggering of cause value control shutdown forward-shifting service of the called subscriber that telecommunication application server carries according to said session initiation protocol response message.
2. the method for claim 1 is characterized in that, also comprise among the said step a,
After the CSCF unit receives the called request message of Calling Side, with said called request message process telecommunication application server, be sent to said IP Multimedia System circuit domain control function unit according to initial filter standard or norm.
3. the method for claim 1; It is characterized in that; Among the said step a; Said IP Multimedia System circuit domain control function unit converts called request message into unstructured supplementary service data called request message, and the called request message of said unstructured supplementary service data is sent to Visited Mobile Switching Center through home subscriber server.
4. method as claimed in claim 3 is characterized in that, said called request message carries said called number information.
5. claim 1,2,3 or 4 described methods is characterized in that, among the said step b, said Visited Mobile Switching Center sends the MAP error response message to IP Multimedia System circuit domain control function unit on the session control path.
6. like claim 1,2,3 or 4 described methods, it is characterized in that the said user cause value that shuts down comprises the absent subscriber.
7. like claim 1,2,3 or 4 described methods, it is characterized in that among the said step c, said session initiation protocol response message is session initiation protocol 503 message, expression user shutdown.
8. like claim 1,2,3 or 4 described methods; It is characterized in that; Among the said step c, said IP Multimedia System circuit domain control function unit is delivered to telecommunication application server with said session initiation protocol response message through the CSCF unit; The shut down triggering of cause value control shutdown forward-shifting service of the called subscriber that telecommunication application server carries according to said session initiation protocol response message.
9. the method for changeing before an IP Multimedia System centralized traffic user shuts down is characterized in that, may further comprise the steps,
Called request message after a1, IP Multimedia System circuit domain control function unit will be changed is sent to home subscriber server, and wherein, the called request message after the said conversion is the called request message of unstructured supplementary service data;
B1, home subscriber server find called subscriber's shutdown, send the MAP error response message to IP Multimedia System circuit domain control function unit, and said MAP error response message is carried called subscriber's cause value that shuts down;
C1, IP Multimedia System circuit domain control function unit are mapped as the session initiation protocol response message with said MAP error response message; Said session initiation protocol response message carries called subscriber's cause value that shuts down, and said session initiation protocol response message is passed to telecommunication application server; The shut down triggering of cause value control shutdown forward-shifting service of the called subscriber that telecommunication application server carries according to said session initiation protocol response message.
10. method as claimed in claim 9 is characterized in that, also comprises among the said step a1,
After the CSCF unit receives the called request message of Calling Side, with said called request message process telecommunication application server, be sent to said IP Multimedia System circuit domain control function unit according to initial filter standard or norm.
11. method as claimed in claim 9; It is characterized in that; Among the said step a1; Said IP Multimedia System circuit domain control function unit converts called request message into unstructured supplementary service data called request message, and the called request message of said unstructured supplementary service data is sent to home subscriber server.
12., it is characterized in that among the said step b1, said home subscriber server sends the MAP error response message to IP Multimedia System circuit domain control function unit on the session control path like claim 9,10 or 11 described methods.
13., it is characterized in that the said user cause value that shuts down comprises the absent subscriber like claim 9,10 or 11 described methods.
14., it is characterized in that among the said step c1, said session initiation protocol response message is session initiation protocol 503 message like claim 9,10 or 11 described methods, expression user shutdown.
15. like claim 9,10 or 11 described methods; It is characterized in that; Among the said step c1, said IP Multimedia System circuit domain control function unit is delivered to telecommunication application server with said session initiation protocol response message through the CSCF unit; The shut down triggering of cause value control shutdown forward-shifting service of the called subscriber that telecommunication application server carries according to said session initiation protocol response message.
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| CN2007101484929A CN101360270B (en) | 2007-08-01 | 2007-09-01 | Customer closedown forwarding method for IP multimedia subsystem centralized service |
| PCT/CN2007/003663 WO2009015532A1 (en) | 2007-08-01 | 2007-12-18 | A method for communication forwarding of user power off with ip multimedia subsystem centralized service |
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