CN1863209A - IMS service triggering method and IMS network - Google Patents
IMS service triggering method and IMS network Download PDFInfo
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Abstract
The invention provides an IMS service triggering method and the IMS network thereof, where the method comprises the steps of: 1. sending side sends SIP message carrying service type field to S-CSCF; 2. S-CSCF judges service type of SIP message according to service type field in SIP message; 3. according to the determined service type, S-CSCF triggering the SIP message to corresponding application server and sends the processed SIP message returning from the application to receiving side. And the invention can simplify iFC and reduce judgment of S-CSCF and raise matching efficiency of S-CSCF, and cause conflict between new and old services by disposing new service.
Description
Technical field
The present invention relates to a kind of communication means, particularly a kind of IMS service trigger method and IMS network.
Background technology
SIP (Session Initiation Protocol, RFC 3261) is the signaling protocol of being formulated by IETF (Internet standard formulation tissue) towards Internet meeting and phone.SIP is the agreement of an application layer, can set up, revises or end Multimedia session or calling.It is an agreement end to end based on ASCII.
Session Initiation Protocol is to be IP phone, the especially agreement that designs in conjunction with Internet specially.Compare with traditional H.323 agreement, Session Initiation Protocol has obvious superiority: 1) You Yi extensibility, improved the disposal ability of system greatly; 2) combine closely with Internet, make communication more easily easily; 3) Zhuo Yue opening not only can provide good support to mobile devices such as mobile phone, PDA, also can finish well for multimedia application such as online instant interchange, voice and video transfer of data.
IMS (IP Multimedia Subsystem, IP Multimedia System) is a new core network " territory " (Domain, new mobile network's system of being made up of many network elements) of 3GPP definition in UMTS R5 (and later version).The prominent features of IMS is, a large amount of ability that Session Initiation Protocol define key network element and interface, key network element used, as has an agent call service control server (Proxy Call Server Control Function, P-CSCF), query call service control server (Interogating Call Server Control Function, I-CSCF), controlling call service control server (Service Call Server Control Function, S-CSCF) etc., can regard dissimilar sip agent/servers as.Provide professional AS (Application Server, application server) also to realize based on Session Initiation Protocol.
The most crucial ability of IMS is exactly the core competence that Session Initiation Protocol possesses:
1. to the discovery and the routing capabilities (promptly to discovery and routing capabilities with the represented destination address of URI) of communication opposite end: the IMS core network can be realized this ability according to the information that endpoint registration obtained.Routing capabilities is cooperated by HSS and CSCF to be realized.
2. to the negotiation ability of the employed medium type of communication: communication two party is consulted by the SDP (Session Description Protocol) that comprises in the Session Initiation Protocol.
Certainly, the ability of IMS is not only these, also is included as other ability that session control defines with the professional needs of operation, and important has:
1. professional triggering ability: system or user can define certain professional condition of triggering, and S-CSCF can be transmitted to relevant AS to trigger business with sip message according to predefined priority/order after receiving a sip message;
2. with the intercommunication of traditional circuit domain terminal: by BGCF select in the network MGCF (with and the MGW of control) finish the conversion of signaling conversion and medium.
Fig. 1 is the schematic diagram of IMS group-network construction.As shown in Figure 1, UE at first is connected to the base station, is linked into IMS territory (" IP domain " among Fig. 1) by PDSN then.In the IMS territory, the control signaling transmits by Session Initiation Protocol, and data flow can be passed through Session Initiation Protocol or other agreements.P-CSCF is the inlet of SIP signaling, is responsible for UE mutual.S-CSCF is a Control Server, is responsible for the S-CSCF that is triggered to application server and issues the recipient.AS is responsible for handling concrete business.
The business triggering ability of IMS is meant that each AS has the trigger condition of oneself, S-CSCF receives behind the sip message and can check that whether this sip message meets the trigger condition that AS sets (is iFC according to a field of message or message content, Initial Filter Criteria), if eligible then be triggered to corresponding AS, do not trigger if just meet.
As shown in Figure 2, the detailed process of the business of IMS triggering is as follows:
Step 2, S-CSCF checks that whether this sip message meets the trigger condition that AS1 sets, and, carries out the judgement of iFC that is;
Step 3 is found to meet, and sip message is issued AS1;
Step 4 after AS1 disposes, is issued S-CSCF to sip message once more;
Step 5, S-CSCF continues to check whether this sip message meets the trigger condition that AS2 sets;
Step 6, S-CSCF finds not meet the trigger condition that AS2 sets, and continues to check whether other application servers are arranged;
Step 7, under the situation that does not have other application servers that need trigger, S-CSCF sends this sip message to the recipient.
At present, the trigger condition of application server can be mated according to any one field of sip message or the content of message body and their combination.For example, certain user has subscribed to instant messaging, and what then the sip message that sends of this user satisfied following 3 kinds of situations is triggered to server of instant message first:
1. all SIP MESSAGE requests all are triggered to server of instant message, i.e. the method " MESSAGE " by name of the sip message of user's transmission.
2. all pass through SIP INVITE request and set up the request of MSRP link and all be triggered to server of instant message, it is the method " INVITE " by name of the sip message that sends of user, and the type of message body is " application/sdp ", and the content that the media-level in the SDP information is described row " m " comprises " message*msrp/tcp " (* wherein represents asterisk wildcard).
All called be the SIP INVITE request of server of instant message, i.e. the method " INVITE " by name of the sip message that sends of user, and the value of a field " TO " comprises " message@homedomain.com ", and is calling procedure.
According to above rule, as shown in Figure 3, under the situation of above-mentioned instant messaging, the judgement flow process of iFC is as follows:
Step 21 is when whether the determination methods name is " Message ", if then sip message is triggered to server of instant message;
Step 22, when the method name is not " Message ", further whether the determination methods name is whether the type of " Invite ", message body is whether the content that " application/sdp " and media-level are described row " m " comprises " message*msrp/tcp ", if then sip message is triggered to server of instant message;
Step 23, when not satisfying condition in the step 22, further whether the determination methods name is whether whether the value of " Invite ", a field " TO " comprise message@homedomain.com and be the calling party, if, then sip message is triggered to server of instant message, otherwise, be not triggered to server of instant message.
Yet because the business of IMS is more and more, AS kind and quantity are also just more and more, and a field of Session Initiation Protocol is limited, and a field of many Session Initiation Protocol need be used for the coupling of multiple business.May cause the matching condition of a plurality of AS similar like this, interact.IFC such as original AS1 is simple, when loading AS2, the iFC of AS2 comprised all AS1 iFC condition and also have other condition, AS1 just needs to revise the iFC of original iFC with differentiation AS2 like this.Therefore after CSCF receives the SIP signaling that the user sends, trigger concrete professional iFC and more and more be difficult to write, be easy to conflict; And when UE received sip message, also being difficult to judgement specifically was which business sends.
For example: all originally SIP MESSAGE message all can be triggered to instant messaging, so the iFC of instant messaging is write as all SIP MESSAGE message are all triggered up.When the POC business occurs, also need SIP MESSAGE message, and all SIP MESSAGE message that belong to the POC business are not need to be triggered on the instant messaging.At this moment just need to revise the iFC of original instant messaging, so that separate with the SIP MESSAGE message area of POC business.
Again for example, all are triggered to instant messaging by the request that SIP INVITE sets up the MSRP link at present, and this iFC is very complicated.If newly-increased again certain business also needs SIP INVITE to set up the MSRP link, it will conflict with the iFC of instant messaging so, just needs to revise the iFC of instant messaging again.
In view of this, need provide a kind of simple and can prevent the IMS service trigger method and the IMS network of iFC conflict.
Summary of the invention
The objective of the invention is to, provide a kind of simple and can prevent the IMS service trigger method of iFC conflict.
Another object of the present invention is to, a kind of IMS network that can prevent the iFC conflict is provided.
To achieve these goals, IMS service trigger method of the present invention may further comprise the steps:
Step 2, S-CSCF is according to the type of service under the judgement of the business type field in the sip message sip message;
Step 3, according to the type of service that step 2 is judged, S-CSCF is triggered to corresponding application server with sip message, and the sip message of beaming back after the application server processes is sent to the recipient.
IMS network of the present invention comprises transmit leg, S-CSCF, application server and recipient.Wherein, the transmit leg sip message that is used for carrying business type field sends to S-CSCF; S-CSCF is used for sip message is triggered to and the type of service corresponding application server, and the sip message that application server is beamed back sending to the recipient according to the type of service under the business type field judgement sip message of sip message.
Wherein, above-mentioned type of service is instant message or conferencing information or POC message or telephone service.
And, can adopt professional name to distinguish miscellaneous service in the above-mentioned business type field, also can adopt professional name and standard name to distinguish miscellaneous service.
Compared with prior art, the invention has the beneficial effects as follows,
1. by the present invention, iFC can be simplified, allow the iFC condition of AS simply only according to a fields match, and newly-increased AS to the iFC of original AS also without any influence;
2. simultaneously,, can reduce the judgement of S-CSCF, make that the process of whole triggering is more succinct, thereby improved the matching efficiency of S-CSCF by the present invention;
And, owing to disposed different signs at different service types, can be so that the iFC between a plurality of AS disturb mutually, thereby conflict between the new old service can not take place because of disposing new business.
Description of drawings
Fig. 1 is the schematic diagram of IMS group-network construction;
Fig. 2 is the flow chart of the business triggering of existing IMS;
Fig. 3 is under the situation of above-mentioned instant messaging, the flow chart of the deterministic process of iFC;
Fig. 4 is the flow chart of IMS service trigger method of the present invention.
Embodiment
For a more clear understanding of the present invention, describe IMS service trigger method of the present invention and IMS network in detail below with reference to accompanying drawing.
In the present invention, the IMS network comprises transmit leg, S-CSCF, application server and the recipient in the existing MIS network equally.Wherein, the transmit leg sip message that is used for carrying business type field sends to S-CSCF; S-CSCF is used for sip message is triggered to and the type of service corresponding application server, and the sip message that application server is beamed back sending to the recipient according to the type of service under the business type field judgement sip message of sip message.
As can be seen, compare with existing IMS network, in order to make S-CSCF can distinguish the type of service of the sip message that transmit leg sends, at first in the sip message of original Session Initiation Protocol definition, increase a field, be used to identify the affiliated type of service of sip message that transmit leg sends, concrete type of service comprises: transfer immediate news; Hold a meeting; Make a phone call or the like.And, also there is the configuration information of respective type among the S-CSCF, like this, during this field in being checked through sip message of S-CSCF, can judge that this sip message is to belong to which business, thereby, this sip message is triggered on the corresponding server.
Table 1 is for increasing a kind of extended mode that (expansion) field realizes above-mentioned functions in sip message:
Table 1
| Parameter name | Form | Explanation |
| Service_Type (type of service) | Service Name/StandardName (professional name/standard name) | ServiceName (professional name): the type of service of sip message, such as: can be divided into Messaging (message), Conference (meeting), POC (PTT), telephone (phone) or the like; StandardName (standard name): define this professional normal structure, such as: 3GPP (third generation partner program) |
Below to subscribe to instant message with transmit leg be that example describes, be understandable that, for the situation of other types of service, also can adopt similar method.
Concrete, subscribed to instant messaging for top user, according to definition of the present invention, the business type field of instant messaging is: ims messaging/3GPP.
The detailed process broadly similar of the present invention and existing IMS service trigger method, the two difference mainly is: increased business type field in the sip message of the present invention, the processing when thereby S-CSCF carries out the judgement of iFC is simplified, that is become simple and fast and can not produce conflict between the different business of the processing in Fig. 2 step 2.
As shown in Figure 4, according to definition of the present invention, IMS service trigger method of the present invention specifically may further comprise the steps:
Step 31, transmit leg sends a sip message and arrives S-CSCF, has increased business type field in this sip message;
Step 32, S-CSCF judges type of service under this sip message according to the business type field in the sip message, is instant message in this example;
Step 33, according to the type of service that step 2 is judged, S-CSCF is triggered to corresponding application server with sip message, and the sip message of beaming back after the application server processes is sent to the recipient.
Like this, compare with the step 2 among Fig. 2, by method of the present invention, iFC can be simplified, allow the iFC condition of AS simply only according to a fields match, and newly-increased AS to the iFC of original AS also without any influence, simultaneously, by method of the present invention, can reduce the judgement of S-CSCF, make that the process of whole triggering is more succinct, thereby improved the matching efficiency of S-CSCF, and, owing to disposed different signs at different service types, can be so that the iFC between a plurality of AS disturb mutually, thus conflict between the new old service can not take place because of disposing new business.For example: disposed instant messaging originally, iFC is triggered by the value ims messaging/3GPP of Service_Type field.When new professional POC of deployment was professional, the iFC of POC was triggered by the value POC/3GPP of Service_Type field.The iFC of original instant messaging service does not need to change like this, also not can with emerging POC service conflict.
Be understandable that, above-mentioned extended mode is a kind of of various extended modes, by name unique and do not produce under the situation of service conflict in business, also can be only with the content of professional name as above-mentioned type of service, that is, can be in above-mentioned business type field only with professional name as trigger condition.For example, for instant messaging, its business type field can become " imsmessaging " by " ims messaging/3GPP ", for the POC business, its business type field can become " POC " by " POC/3GPP ", like this, even if as can be seen between these two kinds of business business type field simplify and also can not produce conflict.Same, for other similarly professional names, also can be suitable equally.
Claims (8)
1. IMS service trigger method may further comprise the steps:
Step 1, transmit leg sends and carries the sip message of business type field to S-CSCF;
Step 2, S-CSCF is according to the type of service under the judgement of the business type field in the sip message sip message;
Step 3, according to the type of service that step 2 is judged, S-CSCF is triggered to corresponding application server with sip message, and the sip message of beaming back after the application server processes is sent to the recipient.
2. the method for claim 1, wherein type of service is instant message or conferencing information or POC message or telephone service.
3. method as claimed in claim 2 wherein, adopts professional name to distinguish miscellaneous service in the described business type field.
4. method as claimed in claim 2 wherein, adopts professional name and standard name to distinguish miscellaneous service in the described business type field.
5. an IMS network comprises transmit leg, S-CSCF, application server and recipient, it is characterized in that,
The sip message that described transmit leg is used for carrying business type field sends to S-CSCF;
Described S-CSCF is used for sip message is triggered to and the type of service corresponding application server, and the sip message that application server is beamed back sending to the recipient according to the type of service under the business type field judgement sip message of sip message.
6. IMS network as claimed in claim 5 is characterized in that, described type of service is instant message or conferencing information or POC message or telephone service.
7. IMS network as claimed in claim 6 is characterized in that, adopts professional name to distinguish miscellaneous service in the described business type field.
8. IMS network as claimed in claim 6 is characterized in that, adopts professional name and standard name to distinguish miscellaneous service in the described business type field.
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| WO2008089652A1 (en) * | 2007-01-19 | 2008-07-31 | Huawei Technologies Co., Ltd. | A method, a device and a system for converging ip message |
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| WO2009039695A1 (en) * | 2007-09-24 | 2009-04-02 | Zte Corporation | A message processing method, apparatus and ip communication system based on the sip protocol |
| CN101159914B (en) * | 2007-11-14 | 2010-12-15 | 杭州东信北邮信息技术有限公司 | Regulation based dynamic service triggering method for IMS network |
| CN101163272B (en) * | 2007-11-14 | 2010-08-11 | 北京邮电大学 | Service triggering method based on application server packet for IMS network |
| CN101447890B (en) * | 2008-04-15 | 2011-11-30 | 中兴通讯股份有限公司 | Improved application server disaster tolerance system of next generation network and method thereof |
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