CN100536469C - Method for preventing re-trigging of intelligent user attribute register - Google Patents
Method for preventing re-trigging of intelligent user attribute register Download PDFInfo
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- CN100536469C CN100536469C CNB2006100000971A CN200610000097A CN100536469C CN 100536469 C CN100536469 C CN 100536469C CN B2006100000971 A CNB2006100000971 A CN B2006100000971A CN 200610000097 A CN200610000097 A CN 200610000097A CN 100536469 C CN100536469 C CN 100536469C
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Abstract
This invention relates to a method for preventing repeated trigger of an intelligent user attribute register, in which, a soft switch adds head domain field at the Invite message head domain of the SIP protocol carrying with call module information and service access code, an applied server transmits said head domain field to the soft switch. The method includes: the soft switch enquires the intelligent user attribute register to get a user intelligent access code and sends initial call request carrying with module information of the call and service access code in the field of X-ASSOCIATED-ID in the Invite message head domain, the applied server processes the call request of the soft switch to transmit the new added field to the soft switch, which judges if the request is the response of the server based on the new field information to continue the call route analysis.
Description
Technical field
The present invention relates to the value-added service field of soft switch, relate in particular to a kind of SHLR of preventing (Smart Home Location Register: the method for the repeated trigger intelligent subscriber property register).
Background technology
Soft switch (Soft Switch) is the nucleus equipment of a Circuit Switching Network to Packet Based Network evolution, also is one of visual plant of Next Generation Telecommunication Networks network.Soft switch is independent of the bottom bearing protocol, mainly finish major functions such as calling out control, media gateway access control, resource allocation, protocol processes, route, authentication, charging, and can provide all professional and diversified third party's business that the available circuit switch can provide to the user, its main feature is: business provides and calls out control separately; Calling out control is connected separately with carrying; Open interface, being convenient to the third party provides professional.
Soft switch is positioned at the key-course face in the next-generation packet network hierarchy, provide various services with bearing bed, signaling network, various IAD, Tandem Gateway etc. by the corresponding protocol intercommunication.Soft switch is positioned at the key-course face in the next-generation packet network hierarchy, as shown in Figure 1, provide various services with bearing bed, signaling network, various IAD, Tandem Gateway etc. by the corresponding protocol intercommunication.In accompanying drawing 1, be to be the framework of the networking of core with the soft switch, in this framework, comprise various IADs, Tandem Gateway, SGW, service application plane etc.; Soft switch provides multiple access means to comprise the access of V5.1, the access of XDSL, wireless access etc.; Various calling controls are mainly finished in soft switch, and the transmission of responsible corresponding service process information; The service application plane mainly provides multiple value-added service.Use in (Multimedia Application) at multimedia service, soft switch provides API (Application Program Interface: application programming interfaces), support third-party application and development by application server to the third party.
SIP (Session Initiation Protocol: session initiation protocol) be the application layer control protocol that on IP network, carries out multimedia communication that IETF proposes, employing is based on the working method of the C/S of text formatting, initiate request by client computer, server responds.SIP is independent of lower layer protocol, adopts application level reliability mechanism to guarantee the reliable transmission of message.SIP is similar to other Internet agreement, adopts distributed calling control and administrative model.The characteristics of Session Initiation Protocol maximum are only to utilize defined message header field, it is carried out simple necessary expansion just can support every new business and IN service easily, have very strong flexibility and extendibility.In addition, SIP also supports multiple address format, comprises E164 and URL etc.In soft switchcall server, Session Initiation Protocol is used for the intercommunication of soft switch and sip terminal, application server, SIP network.
In the value-added service framework based on soft switch, the discriminating and the access of intelligent call is responsible in soft switch, and the logic that application server is responsible for various value-added services produces and management, and the API of various openings is provided, for the exploitation of third party's business provides authoring platform.Communication protocol between soft switch and the application server mainly adopts SIP.The Session Initiation Protocol interface comprises two parts content: be which IN service soft switch need need handle in order to the notice application server to application server business transferring information on the one hand; Be that application server need be to soft switch business transferring information on the other hand, so that soft switch is with this business information when inquiry SHLR, SHLR can determine the current IN service that has triggered and can trigger according to this information, realizes professional nested triggering.
SHLR is as the integrated data store of the signatory attribute of user in the solution of present intelligent network.Soft switch obtains the user intelligent service access code by inquiry SHLR, and, be put in Request-URI (Request-Uniform Resource Identifier: request---the unified resource sign) territory of sip message the part that service access code is analyzed as called number.Which kind of IN service what application server was learnt triggering by the resolving called number is, and this service access code only is present between soft switch and the application server, should not have this service access code in the call signaling between Softswitch.Because after calling is linked into application server, application server may send original calling and called to soft switch, and be a brand-new calling from soft switch, be that soft switch is reported to the calling that sends after the calling of application server and the application server Business Processing, in soft switch being two independently calls out, without any association, may cause repeated trigger.In order to prevent repeated trigger, soft switch need be transmitted call information to application server, need handle which kind of IN service of which calling in order to the notice application server; Another is that application server need transmit call information to soft switch, so that soft switch is with this information when inquiry SHLR, SHLR can determine the current IN service that has triggered and can trigger according to this information, realizes professional nested triggering.
Summary of the invention
The objective of the invention is to solve call out insert in repeated trigger problem between soft switch and the application server.
For achieving the above object, the invention provides a kind of implementation method of the SHLR of preventing repeated trigger: soft switch increases a header field field at the INVITE header field of Session Initiation Protocol, be used for carrying the module information and the service access code of calling, soft switch sends to application server with this INVITE by the initial call request; Application server is given soft switch with the module information and the service access code transparent transmission that receive; Soft switch is judged the response that this initial call request is an application server according to this header field field, finishes this initial call request.Wherein, the module information of calling is a signature identification field of soft switch inside.
As shown in Figure 2, performing step of the present invention is as follows:
S01. soft switch obtains the user intelligent service access code by inquiry SHLR;
S02. soft switch sends the initial call request to application server, carries the module information and the service access code of calling in newly-increased field X-ASSOCIATED-ID;
S03. the call request of application server processes soft switch sends in the INVITE of call request of soft switch at application server, gives soft switch with the X-ASSOCIATED-ID transparent transmission;
S04. the call request that application server sends is received in soft switch, judges that according to the information of X-ASSOCIATED-ID this request is the response of application server, and soft switch finishes this initial call request, carries out the subsequent voice calls route analysis.
Wherein X-ASSOCIATED-ID is the sign of initial call request, prevents the repeated trigger of soft switch and application server; Follow-up behavior among the step S04 is that basic SIP calls out control action, when soft switch sends a request message to another soft switch, does not comprise the module information that has calling and the header field field of service access code.
Further, sip message adopts readable strong text formatting; For the automatic subscriber dialing access code, flexible exchange analysis is inserted in the header field field after drawing the service access code of automatic subscriber dialing access code; Applied server platform is supported the expansion of the header field of SIP; The service logic of soft switch and the application programming interfaces api interface between the application server do not transmit call information.
Compared with prior art, the present invention has the following advantages: the header field field of the increase that proposes according to the present invention has been avoided the repeated trigger between soft switch and the application server as sign.Through after the querying triggering repeatedly, just can set up conversation normally between the calling and called, prevented the repeated trigger of SHLR, thereby has guaranteed that successfully the IN service of triggering brings high-quality work and life to the user.
Description of drawings
The connection diagram of Fig. 1 soft switch and various gateway and bearer network;
Fig. 2 is a performing step flow chart of the present invention;
Fig. 3 is the format chart of SIP header field message of the present invention;
Fig. 4 is the implementation procedure schematic diagram of the embodiment of the invention;
Fig. 5 is the performing step flow chart of the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing, optimum implementation of the present invention is described in detail.
The form of present embodiment SIP header field message is as shown in Figure 3: the extensibility of utilizing Session Initiation Protocol itself, in the INVITE header field of SIP, increase an X-ASSOCIATED-ID header field field newly, be used for carrying the module information of calling and the service access code that SHLR sends specially.Wherein, the module information of calling is a signature identification field of soft switch inside.Because sip message itself is to adopt readable strong text formatting, message groups bag and parsing are all extremely convenient.Soft switch is inserted the service access code that the module information and the SHLR of this calling returns in the X-ASSOCIATED-ID field, and for the automatic subscriber dialing access code, and soft switch is analyzed it and inserted in the X-ASSOCIATED-ID field after drawing service access code.Applied server platform is supported the expansion in the X-ASSOCIATED-ID territory of SIP, and be reported to the X-ASSOCIATED-ID of application server to be transparent in the INVITE that application server sends to soft switch soft switch, the api interface between service logic and the applied server platform does not need to transmit this call information.This information has been arranged, and the calling of soft switch back just knows which calling has triggered IN service, and current business of triggering and need go business of triggering.Through after the querying triggering so repeatedly, can set up conversation normally between the calling and called.
The business realizing schematic diagram of present embodiment is as shown in Figure 4: when soft switch 1 sends initial request to application server, carry the module information and the service access code of calling in new field X-ASSOCIATED-ID; After the intact business of application server processes, give soft switch 1 with call forward; In the call request of mailing to soft switch 1, application server returns the module information that carries calling and the X-ASSOCIATED-ID of service access code; Soft switch 1 is carried out the subsequent voice calls route analysis according to the initial request that application server sends.Carry the module information of calling and the X-ASSOCIATED-ID of service access code in the call request of application server, wherein the module information of Hu Jiaoing is a signature identification field of soft switch inside; The follow-up behavior of soft switch is that basic SIP calls out control action; When soft switch 1 sends call request to soft switch 2, do not have the header field field X-ASSOCIATED-ID that comprises module information and service access code, so just avoided the repeated trigger of calling out.
As shown in Figure 5, the concrete steps of present embodiment business realizing are:
S101. soft switch 1 obtains the user intelligent service access code by inquiry SHLR;
S102. soft switch 1 sends the initial call request to application server 1, carries the module information and the service access code of calling in newly-increased field X-ASSOCIATED-ID header field;
S103. application server 1 is handled the call request of soft switch 1, sends in the INVITE of call request of soft switch at application server 1, gives soft switch with the X-ASSOCIATED-ID transparent transmission;
S104. the call request that application server 1 sends is received in soft switch 1, judges that according to the information of X-ASSOCIATED-ID this request is the response of application server 1, and soft switch finishes this initial call request, carries out the subsequent voice calls route analysis.
Wherein, X-ASSOCIATED-ID is the sign of initial call request, prevents the repeated trigger of soft switch and application server; Subsequent voice calls behavior among the step S104 is that basic SIP calls out control action, when soft switch sends a request message to another soft switch, does not have the header field message that comprises module information and service access code; Sip message adopts readable strong text formatting; For the automatic subscriber dialing access code, flexible exchange analysis is inserted in the header field message after drawing the service access code of automatic subscriber dialing access code; Applied server platform is supported the expansion of the header field of SIP; The service logic of soft switch and the application programming interfaces api interface between the applied server platform do not transmit call information.
By method of the present invention, just realize the call request and the response of soft switch and application server like this, and avoided the repeated trigger of calling out.
Claims (8)
1. implementation method that prevents intelligent subscriber property register repeated trigger, it is characterized in that: soft switch increases a header field field at the INVITE header field of Session Initiation Protocol, be used for carrying the module information and the service access code of calling, soft switch sends to application server with this INVITE by the initial call request; Application server is given soft switch with this header field field transparent transmission; Soft switch is judged the response that this initial call request is an application server according to this header field field, finishes this initial call request.
2. the implementation method that prevents intelligent subscriber property register repeated trigger as claimed in claim 1 is characterized in that may further comprise the steps:
S01. soft switch obtains the user intelligent service access code by inquiry intelligent subscriber property register;
S02. soft switch sends the initial call request to application server, carries the module information and the service access code of calling in the newly-increased field X-ASSOCIATED-ID of INVITE header field;
S03. after the call request of application server processes soft switch, send in the INVITE of call request of soft switch, give soft switch the X-ASSOCIATED-ID transparent transmission at application server;
S04. the call request that application server sends is received in soft switch, judges that according to the information of X-ASSOCIATED-ID this call request is the response of application server, and soft switch finishes this initial call request, carries out the subsequent voice calls route analysis.
3. the implementation method that prevents intelligent subscriber property register repeated trigger as claimed in claim 2 is characterized in that: described X-ASSOCIATED-ID is the sign of initial call request, prevents the repeated trigger of soft switch and application server.
4. the implementation method that prevents intelligent subscriber property register repeated trigger as claimed in claim 2, it is characterized in that: the subsequent voice calls route analysis among the described step S04 is that basic SIP calls out control action, when soft switch sends a request message to another soft switch, do not comprise the module information that has calling and the header field field of service access code.
5. the implementation method that prevents intelligent subscriber property register repeated trigger as claimed in claim 1 is characterized in that: described sip message adopts readable strong text formatting.
6. the implementation method that prevents intelligent subscriber property register repeated trigger as claimed in claim 1 is characterized in that: for the automatic subscriber dialing access code, after described flexible exchange analysis draws the service access code of automatic subscriber dialing access code, it is inserted in the header field field.
7. the implementation method that prevents intelligent subscriber property register repeated trigger as claimed in claim 1 is characterized in that: described application server is supported the expansion of the header field of SIP.
8. the implementation method that prevents intelligent subscriber property register repeated trigger as claimed in claim 1 is characterized in that: the service logic of described soft switch and the application programming interfaces api interface between the application server do not transmit call information.
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| CNB2006100000971A CN100536469C (en) | 2006-01-10 | 2006-01-10 | Method for preventing re-trigging of intelligent user attribute register |
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| CN100536469C true CN100536469C (en) | 2009-09-02 |
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| CN101262622B (en) * | 2007-03-07 | 2013-05-01 | 中兴通讯股份有限公司 | Intelligent service processing method and soft switching service network in soft switching service network |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1503524A (en) * | 2002-11-23 | 2004-06-09 | 深圳市中兴通讯股份有限公司 | Method of interconnected business providing between control equipment and business equipment in IP network |
| CN1556655A (en) * | 2003-12-30 | 2004-12-22 | 北京邮电大学 | Integrated calling system for realizing flexible exchange multikind signalling and calling treatment method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1503524A (en) * | 2002-11-23 | 2004-06-09 | 深圳市中兴通讯股份有限公司 | Method of interconnected business providing between control equipment and business equipment in IP network |
| CN1556655A (en) * | 2003-12-30 | 2004-12-22 | 北京邮电大学 | Integrated calling system for realizing flexible exchange multikind signalling and calling treatment method |
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