CN101997856B - Signaling message interaction method and application server - Google Patents
Signaling message interaction method and application server Download PDFInfo
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- CN101997856B CN101997856B CN200910167573.2A CN200910167573A CN101997856B CN 101997856 B CN101997856 B CN 101997856B CN 200910167573 A CN200910167573 A CN 200910167573A CN 101997856 B CN101997856 B CN 101997856B
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Abstract
The invention discloses a signaling message interaction method and an application server. The method comprises the following steps: the application server receives a first message from a calling party and a second message from the called party, wherein the first message carries first media transmitted to the called party, the second message carries second media transmitted to the calling party, and the first media are different from the second media; the application server judges the type of the first media; and the first media are processed according to the type of the first media. The invention can prevent media negotiation abnormality in the early stage of conversation/formal conversation when the media carry out transmission and negotiation simultaneously.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of exchange method and application server of signaling message.
Background technology
IP Multimedia System (IP Multimedia Subsystem, referred to as IMS) be by third generation partner program (Third Generation Partner Ship Project, referred to as 3GPP) the 3G core net of definition is to the network architecture of complete IP network evolution, the communication system that it superposes and is comprised of business control device, customer data base, network interworking equipment etc. on packet domain, for providing IP multimedia service.
In IMS system, key-course is separated with operation layer, particularly: key-course does not provide concrete business, is only responsible for providing necessary triggering, routing and charging etc. to control function to operation layer.The control function of key-course is to be completed by CSCF (Call SessionControl Function, referred to as CSCF).CSCF is divided into Proxy Call Session Control Function (Proxy Call Session Control Function, referred to as P-CSCF), query call conversation control function (Interrogating Call Session Control Function, referred to as I-CSCF) and service call conversation control function (Serving Call SessionControl Function, referred to as S-CSCF) three types.Operation layer is comprised of a series of application servers (Application Server, referred to as AS), and concrete business service can be provided, and AS can be entity independently, also may reside in S-CSCF.S-CSCF triggers according to user's CAMEL-Subscription-Information service control, and the business on AS called is to realize concrete business function.AS and S-CSCF can be referred to as service equipment (Server Equipment, referred to as SE).End-to-end equipment in session is called subscriber equipment (User Equipment, referred to as UE), is responsible for mutual with user.In IMS, between each functional entity, use initial session protocol (Session Initiation Protocol, referred to as SIP) to carry out communication.
SIP is the signaling control protocol of application layer, for creating, revise and discharge one or more participants' session.For loading condition and the feature of describing message content, SIP is used the Session Description Protocol (Session Description Protocol, referred to as SDP) of Internet to describe the feature of terminal equipment.SDP agreement can be transmitted medium stream information in media session, allows the recipient of conversation description to participate in session.In media session, can be divided into early-session (Early Session) and formal session (Regular Session, referred to as Session), the media that use are respectively early media (Early Media), such as ring-back tone, color bell sound and stand by tone etc., and call media (Regular Media).
Below illustrate the implementation of Early Media, RFC3960 has defined two kinds of implementations for EarlyMedia, is respectively Gateway pattern and ApplicationServer pattern, particularly:
Gateway pattern completes the mutual of Early Media by set up Early Session before final response, conventionally media can be realized by interim reliable response PRACK and UPDATE alternately, but, in Forking, may there is Media Clipping in Gateway pattern, therefore, in order to reach the effect of traditional PSTN network, calling terminal need to have complicated local sound reproduction strategy.Except calling terminal, the situation of Early and Regular media can not be distinguished, Application server pattern should be preferably adopted.
Application Server pattern is passed through at subscriber proxy server end (User AgentServer, referred to as UAS) and User Agent Client (User Agent Client, referred to as UAC) between set up the Early Session separated with Session session session to complete media mutual, Early Session and Session carry out respectively media negotiation, when arriving, Session media are switched to Session media, or, while receiving 200OK in signaling, be switched to Session media, can guarantee not lose Session media.Application Server pattern is under same Dialog condition, to carry out Early Session and Session media negotiation, angle from end side, to hold consultation respectively and resource reservation on Early Session and Session media port, from the angle of AS side, can transmit and consult by using different affairs signaling messages to carry respectively two sections of media same Dialog is next.If but at Session Initiation Protocol stack, do not support parallel eventful business, Session Initiation Protocol stack can only be processed in the situation of affairs at one time, and the mutual of signaling message that carries two sections of media easily produces conflict and causes media negotiation abnormal.
In sum, for the mutual easily generation of carrying the signaling message of two sections of media in correlation technique in the situation that Session Initiation Protocol stack is not supported parallel eventful business, conflict and cause the abnormal problem of media negotiation, not yet proposing at present effective solution.
Summary of the invention
For easily the producing conflict alternately of the signaling message that carries two sections of media in the situation that Session Initiation Protocol stack is not supported parallel eventful business existing in correlation technique, cause the abnormal problem of media negotiation and propose the present invention, for this reason, main purpose of the present invention is to provide a kind of exchange method and application server of signaling message, one of to address the above problem at least.
To achieve these goals, according to an aspect of the present invention, provide a kind of exchange method of signaling message.
According to the exchange method of signaling message of the present invention, comprise: application server receives from the first message of caller with from the second called message, wherein, the first message carries and is sent to the first called media, the second message carries the second media that are sent to caller, and the first media are different from the second media; Application server judges the type of the first media; According to the type of the first media, the first media are processed.
Preferably, application server judges that the type of the first media comprises: judgement the first media are for replying class media or for class media are provided.
Preferably, according to the type of the first media, the first media are processed and comprised: judging the first media for reply class media in the situation that, application server buffer memory the first media; Or judging the first media for class media are provided in the situation that, application server rollback the first media.
Preferably, application server rollback the first media comprise: application server sends the rollback message of the information that carries the indication stand-by period to the first media, wherein, the stand-by period is the shortest stand-by period that caller is allowed to again initiate to application server signaling request message.
Preferably, after the first media being processed according to the type of the first media, said method also comprises: application server sends the message that carries the second media to caller.
Preferably, at the first media, for reply class media in the situation that, after sending to caller at application server and carrying the message of the second media, said method also comprises: application server carries the message of the first media to called transmission.
Preferably, the first media are formal conversation media, and the second media are early-session media; Or the first media are early-session media, the second media are formal conversation media.
To achieve these goals, according to another aspect of the present invention, provide a kind of application server.
Application according to the present invention server comprises: receiver module, for receiving from the first message of caller with from the second called message, wherein, the first message carries and is sent to the first called media, the second message carries the second media that are sent to caller, and the first media are different from the second media; Judge module, for judging the type of the first media; Processing module, for processing the first media according to the type of the first media.
Preferably, processing module comprises: first processes submodule, at the first media buffer memory first media for reply class media in the situation that; Second processes submodule, at the first media rollback first media for class media are provided in the situation that.
Preferably, application server also comprises: sending module, after the first media being processed for the treatment of module, sends the message that carries the second media to caller.
By the present invention, employing is carried out buffer memory or rollback to the early-session from caller/formal conversation media, solved the mutual of signaling message that carries two sections of media in the situation that Session Initiation Protocol stack is not supported parallel eventful business and easily produced conflict and cause the abnormal problem of media negotiation, session in early days/formal conversation media transmit simultaneously and the situation of consulting under prevent the generation that media negotiation is abnormal.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is according to the flow chart of the exchange method of the signaling message of the embodiment of the present invention;
Fig. 2 is the application scenarios schematic diagram of the exchange method of the signaling message of example according to the present invention;
Fig. 3 is the signaling process figure of the exchange method of the signaling message of example according to the present invention;
Fig. 4 is according to the structured flowchart of the application server of the embodiment of the present invention;
Fig. 5 is according to the structured flowchart of the application server processes module of the embodiment of the present invention.
Embodiment
Functional overview
Consider problems of the prior art, the embodiment of the present invention provides a kind of interaction schemes of signaling message, thereby control for the signaling of carrying out media negotiation for terminal in AS side, to solve the conflict of consulting abnormal, the treatment principle of this scheme is as follows: application server receives from the first message of caller with from the second called message, wherein, the first message carries and is sent to the first called media, the second message carries the second media that are sent to caller, and the first media and the second media are not identical; Application server judges the type of the first media; According to the type of the first media, the first media are processed.Whether this scheme also needs to send to the Early Session/Session caller media that send in the called media of Session/Early Session of caller and caller to carry out integrated decision-making judgement according to existing, and control, thereby can make forward AS use Application Server pattern to carry out when Early Session and Session media are held consultation respectively controlling and avoiding signaling conflict for signaling.
Hereinafter with reference to accompanying drawing, also describe the present invention in detail in conjunction with the embodiments.It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the application can combine mutually.
Embodiment of the method
According to embodiments of the invention, provide a kind of exchange method of signaling message.Fig. 1 is according to the flow chart of the exchange method of the signaling message of the embodiment of the present invention, and as shown in Figure 1, the method comprises that following step S102 is to step S106:
Step S102, application server receives from the first message of caller with from the second called message, wherein, the first message carries and is sent to the first called media, the second message carries the second media that are sent to caller, the first media and the second media are not identical, particularly, the first media are formal conversation media, the second media are early-session media, or the first media are early-session media, the second media are formal conversation media, for example, in actual applications, there are the called media of Session/Early Session that also need to send to caller in AS judgement, there are the Early Session/Session caller media that send in caller in judgement simultaneously.In actual applications, above-mentioned the first message and the second message can be sip message, that is, above-mentioned the first message and the second message can be specially the first sip message and the second sip message, also can be other message that can carry above-mentioned media, the embodiment of the present invention be not construed as limiting this.
Step S104, application server judges the type of the first media, wherein, the type of the first media can be for replying class media or class media being provided, i.e. the Early Session/Session caller media that send in AS judgement caller are Answer media or Offer media.
Step S106, processes the first media according to the type of the first media, particularly, judges that the first media are for reply class media in the situation that, application server buffer memory the first media at application server; Or in the situation that application server judges that the type of the first media is for providing class media, application server rollback the first media, application server rollback the first media are specially: application server sends the rollback message of the information that carries the indication stand-by period to the first media, wherein, the stand-by period is the shortest stand-by period that caller is allowed to again initiate to application server signaling request message.After the first media being processed according to the type of the first media, application server sends the message that carries the second media to caller.In actual applications, if the Early Session/Session caller media that send in AS judgement caller are Answer media, these Answer caller media of buffer memory, then by suitable SIP affairs signaling message, carrying the called media of Session/Early Session sends to caller, reach the requirement of simultaneously consulting respectively two sections of media, or, if the EarlySession/Session media that send in AS judgement caller are Offer media, send 500 message to caller, then by suitable SIP affairs signaling message, carrying the called media of Session/Early Session sends to caller, reach the requirement of simultaneously consulting respectively two sections of media.Above-mentioned 500 message comprise Retry-After head, and time value is 0 to 10S optional value, and within the time interval of Retry-After field appointment, calling terminal should not transmit any other signaling request to this application server AS; When the time of Retry-After head indication arrives, calling terminal resend carry media corresponding signaling request to AS, the decision-making of end side is depended in the now transmission of signaling.
Further, in the situation that the type of the first media is to reply class media, at application server, after caller transmission carries the initial session protocol signaling message of the second media, application server carries the message of the first media to called transmission.
Below in conjunction with example, the implementation procedure of the embodiment of the present invention is described in detail.
Fig. 2 is the application scenarios schematic diagram of the exchange method of the signaling message of example according to the present invention, Fig. 3 is the signaling process figure of the exchange method of the signaling message of example according to the present invention, is specially the process of using Application Server Pattern completion to call out in non-parallel eventful business Session Initiation Protocol stack situation.To take the scene shown in Fig. 2 as basis and in conjunction with Fig. 3, the instantiation of Call Forwarding No Reply business is described below, and the method providing as the example explanation embodiment of the present invention.It should be noted that, in Fig. 3, omit forward AS and the related news of subscriber equipment B, subscriber equipment C.
1. subscriber equipment A calls out B, to its CSCF initiate a session request (session);
2. the CSCF of subscriber equipment A is to the CSCF for B initiate a session request (session);
3. the CSCF forwards AS of subscriber equipment B initiate a session request (session);
4. forward AS is to the CSCF of subscriber equipment B initiate a session request (session);
5. CSCF forwards AS initiation session 180 responses (earlysession) of subscriber equipment B;
6. forward AS is to CSCF initiation session 180 responses (earlysession) of subscriber equipment B;
7. the CSCF of subscriber equipment B is to CSCF initiation session 180 responses (early session) of subscriber equipment A;
8. the CSCF of subscriber equipment A is to 180 responses (earlysession) of subscriber equipment A initiation session;
9. subscriber equipment A is to the CSCF initiation session prack request (earlysession) of subscriber equipment A;
10. the CSCF of subscriber equipment A is to the CSCF initiation session prack request (early session) of subscriber equipment B;
The CSCF forwards AS initiation session prack request (earlysession) of 11. subscriber equipment B;
12. forward AS are to the CSCF initiation session prack request (earlysession) of subscriber equipment B;
After 13. forward AS no answer timeouts, to the CSCF of subscriber equipment B, initiate a session request (session), be forwarded to C;
The CSCF of 14. subscriber equipment B is to the CSCF of subscriber equipment C initiate a session request (session);
The CSCF of 15. subscriber equipment C is finally to subscriber equipment C initiate a session request (session);
16. subscriber equipment C are to CSCF initiation session 183 responses (earlysession, session) of subscriber equipment C;
The CSCF of 17. subscriber equipment C is to CSCF initiation session 183 responses (early session, session) of subscriber equipment B;
The CSCF of 18. subscriber equipment B is to forward AS initiation session 183 responses (early session, session) of subscriber equipment B;
19.Early-Session and Session carry out respectively after media negotiation, and the forward AS of subscriber equipment B is to the CSCF initiation session update request (earlysession) of subscriber equipment B;
The CSCF of 20. subscriber equipment B is to the CSCF initiation session update request (early session) of subscriber equipment A, and the Offer media that forward AS (B) forwards Early-Session by conversation request message are to A;
The CSCF of 21. subscriber equipment A is to subscriber equipment A initiation session update request (early session);
22. subscriber equipment A are to the CSCF initiation session 200OK response (early session) of subscriber equipment A;
The CSCF of 23. subscriber equipment A is to subscriber equipment A initiation session 200OK response (early session);
The CSCF of 24. subscriber equipment B to the forward AS initiation session 200OK response (early session) of subscriber equipment B, that is, initiates the Answer response message of Early-Session to forward AS (B), this caller of AS buffer memory Answer media;
25. subscriber equipment A are to the CSCF initiation session update request (early session) of subscriber equipment A;
The CSCF of 26. subscriber equipment A is to the CSCF initiation session update request (early session) of subscriber equipment B;
The CSCF forwards AS initiation session update request (earlysession) of 27. subscriber equipment B, particularly, initiates the Offer request message of Early-Session to forward AS (B);
The forward AS of 28. subscriber equipment B initiates the above-mentioned Offer request message of 500 (Retry-After) message rollback to the CSCF of subscriber equipment B;
The CSCF of 29. subscriber equipment B initiates 500 (Retry-After) message to the CSCF of subscriber equipment A;
The CSCF of 30. subscriber equipment A initiates 500 (Retry-After) message to subscriber equipment A;
The forward AS of 31. subscriber equipment B is to CSCF initiation session 183 responses (session) of subscriber equipment B;
The CSCF of 32. subscriber equipment B is to CSCF initiation session 183 responses (session) of subscriber equipment A;
The CSCF of 33. subscriber equipment A is to 183 responses (session) of subscriber equipment A initiation session.
Above-mentioned steps 31 to step 33 be the forward AS of subscriber equipment B by conversational response message, forward Session Answer media to subscriber equipment A.
And calling terminal A is at Retry-After in the time interval, UE does not transmit a request to original server end.
Device embodiment
According to embodiments of the invention, provide a kind of application server.Fig. 4 is according to the structured flowchart of the application server of the embodiment of the present invention.As shown in Figure 4, above-mentioned application server comprises: receiver module 42, for receiving from the first message of caller with from the second called message, wherein, the first message carries and is sent to the first called media, the second message carries the second media that are sent to caller, and the first media are different from the second media; Judge module 44, is connected in receiver module 42, for judging the type of the first media; Processing module 46, is connected in judge module 44, for the first media being processed according to the type of the first media.
Fig. 5 is according to the structured flowchart of the application server processes module of the embodiment of the present invention.As shown in Figure 5, processing module comprises: first processes submodule 52, at the first media buffer memory first media for reply class media in the situation that; Second processes submodule 54, at the first media rollback first media for class media are provided in the situation that.
Preferably, application server can also comprise: sending module, after the first media being processed for the treatment of module, sends the message that carries the second media to caller.
The interaction schemes of the signaling message that the embodiment of the present invention provides can not supported under parallel eventful business condition at Session Initiation Protocol stack, use the media consulation method of Application Server pattern simultaneously, session in early days/formal conversation media transmit simultaneously and the situation of consulting under can prevent the generation that media negotiation is abnormal.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, or they are made into respectively to each integrated circuit modules, or a plurality of modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (6)
1. an exchange method for signaling message, is characterized in that, described method comprises:
Application server receives from the first message of caller with from the second called message, wherein, described the first message carries and is sent to described the first called media, and described the second message carries the second media that are sent to described caller, and described the first media are different from described the second media; Described the first media are formal conversation media, and described the second media are early-session media; Or described the first media are early-session media, described the second media are formal conversation media;
Described application server judges the type of described the first media;
According to the type of described the first media, described the first media are processed,
Wherein, described application server judges that the type of described the first media comprises: judge that described the first media are for replying class media or for class media are provided, in the situation that judging described the first media and replying class media described in being, the first media described in described application server buffer memory; Or judging described the first media for described class media are provided in the situation that, the first media described in described application server rollback.
2. method according to claim 1, is characterized in that, the first media comprise described in described application server rollback:
Described application server sends the rollback message of the information that carries the indication stand-by period to described the first media, wherein, the described stand-by period is the shortest stand-by period that described caller is allowed to again initiate to described application server signaling request message.
3. according to the method described in claim 1, it is characterized in that, after according to the type of described the first media, described the first media being processed, described method also comprises:
Described application server sends the message that carries described the second media to described caller.
4. method according to claim 3, is characterized in that, in the situation that described the first media are replied class media described in being, after sending to described caller at described application server and carrying the message of described the second media, described method also comprises:
Described application server carries the message of described the first media to described called transmission.
5. an application server, is characterized in that, comprising:
Receiver module, for receiving from the first message of caller with from the second called message, wherein, described the first message carries and is sent to described the first called media, described the second message carries the second media that are sent to described caller, and described the first media are different from described the second media; Described the first media are formal conversation media, and described the second media are early-session media; Or described the first media are early-session media, described the second media are formal conversation media;
Judge module, for judging the type of described the first media;
Processing module, for described the first media being processed according to the type of described the first media, wherein said processing module comprises:
First processes submodule, at described the first media first media described in buffer memory for reply class media in the situation that;
Second processes submodule, at described the first media first media described in rollback for class media are provided in the situation that.
6. application server according to claim 5, is characterized in that, described application server also comprises:
Sending module, after described the first media being processed for described processing module, sends the message that carries described the second media to described caller.
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| CN200910167573.2A CN101997856B (en) | 2009-08-26 | 2009-08-26 | Signaling message interaction method and application server |
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Citations (4)
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| CN1691817A (en) * | 2004-04-30 | 2005-11-02 | 华为技术有限公司 | Session establishing method |
| CN101242564A (en) * | 2007-02-05 | 2008-08-13 | 田蕊 | Broadcasting and receiving method for mobile wireless self-organized network message and applied terminal node |
| CN101340384A (en) * | 2008-08-12 | 2009-01-07 | 中兴通讯股份有限公司 | Method for implementing one-number-business resonance service and adopted application server |
| CN101448221A (en) * | 2008-04-02 | 2009-06-03 | 中兴通讯股份有限公司 | Method for call state supporting early-session |
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2009
- 2009-08-26 CN CN200910167573.2A patent/CN101997856B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1691817A (en) * | 2004-04-30 | 2005-11-02 | 华为技术有限公司 | Session establishing method |
| CN101242564A (en) * | 2007-02-05 | 2008-08-13 | 田蕊 | Broadcasting and receiving method for mobile wireless self-organized network message and applied terminal node |
| CN101448221A (en) * | 2008-04-02 | 2009-06-03 | 中兴通讯股份有限公司 | Method for call state supporting early-session |
| CN101340384A (en) * | 2008-08-12 | 2009-01-07 | 中兴通讯股份有限公司 | Method for implementing one-number-business resonance service and adopted application server |
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| CN101997856A (en) | 2011-03-30 |
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