CN101567797B - Method and system for realizing transfer class service - Google Patents
Method and system for realizing transfer class service Download PDFInfo
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- CN101567797B CN101567797B CN200910138483.0A CN200910138483A CN101567797B CN 101567797 B CN101567797 B CN 101567797B CN 200910138483 A CN200910138483 A CN 200910138483A CN 101567797 B CN101567797 B CN 101567797B
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- media
- calling subscriber
- user
- class service
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/1066—Session management
- H04L65/1083—In-session procedures
- H04L65/1093—In-session procedures by adding participants; by removing participants
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/1066—Session management
- H04L65/1083—In-session procedures
- H04L65/1094—Inter-user-equipment sessions transfer or sharing
Abstract
The present invention discloses a method for realizing transfer class service, wherein the method comprises the following steps: executing media negotiation between a calling subscriber and a second subscriber; when a triggering condition is satisfied, transferring the calling to a third-party subscriber by a transfer class service application server AS for completing an offer/answer model of media negotiation executed between the calling subscriber and the second subscriber, and executing the media negotiation between the calling subscriber and the third-party subscriber. According to the invention, the offer/answer model of media negotiation executed by the calling subscriber in a forward channel thereby the calling subscriber can execute media negotiation with the third-party subscriberwhich receives the transferred calling.
Description
Technical field
The present invention relates to IP Multimedia System, relate in particular to a kind of method and system that realize transfer class service.
Background technology
Network interconnection agreement (Internet Protocol, IP) IP multimedia subsystem, IMS (IP Multimedia CoreNetwork Subsystem, IMS) be by third generation partner program (3rd GenerationPartnership Project, a kind of IP-based network architecture that 3GPP) proposes, made up an opening and service environment flexibly, support multimedia application, can provide abundant multimedia service for the user.
In the IMS system, key-course separates with operation layer, and key-course does not provide concrete business, only is responsible for providing to operation layer the control functions such as necessary triggering, routing and charging.The control function of key-course is to be finished by CSCF (Call Session Control Function is called for short CSCF).
CSCF is divided into Proxy Call Session Control Function (Proxy Call Session Control Function, abbreviation P-CSCF), query call conversation control function (Interrogating Call Session ControlFunction, be called for short I-CSCF) and service call conversation control function (Serving Call SessionControl Function is called for short S-CSCF) three types.Operation layer is comprised of a series of application servers (Application Server, AS), and concrete business service can be provided, and AS can be entity independently, also may reside among the S-CSCF.S-CSCF triggers according to user's CAMEL-Subscription-Information service control, calls the business on the AS, realizes business function.AS and S-CSCF can be referred to as service equipment (Server Equipment is called for short SE).End-to-end equipment in the session is called subscriber equipment (UserEquipment, UE), is responsible for mutual with the user.In IMS, use SIP (Session Initialion Protocol, initial session protocol) to carry out communication between each functional entity.
Transfer class service is the important business of a class among the IMS, and in the ideal situation, when the trigger condition that calling is shifted satisfied, the media negotiation of calling out in the passage was finished, and when initiating new calling, can carry out normal media negotiation.But, in some cases, in the professional mutually nested complex scene of one number service sequential ringing service and forward class, may exist to call out in the passage and still carry out media negotiation, and the situation that the trigger condition of calling out transfer has satisfied, this moment, the calling subscriber can't carry out media negotiation with the user who is transferred into, and caused the call transfer service failure.
For example, as shown in Figure 1, calling subscriber A calls out called subscriber B, called subscriber B contracts the one number service sequential ringing service, CSC is to user C, user D and user E, when the one number service CSC AS of called subscriber B adopts B2BUA (Back-To-Back User Agent, back-to-back user agent) pattern, calling subscriber A is called forward path to the calling passage between the one number service CSC AS of called subscriber B; The one number service CSC AS of called subscriber B is called backward channel to the calling passage between the different CSC users, and wherein, CSC is called backward channel 1 to the calling passage of user C; CSC is called backward channel 2 to the calling passage of user D; CSC is called backward channel 3 to the calling passage of user E; Under the scene of carrying out end-to-end media negotiation, forward path is unique, and backward channel is not unique.
With reference to Fig. 1, if user C also contracts forward class business or one number service sequential ringing service are arranged, when the trigger condition of called subscriber B one number service CSC satisfies, CSC calling party C, if it is professional to trigger one number service sequential ringing service or the multiple forwardings of user C this moment, and call out and finally land to user N, when calling subscriber A and user N carry out media negotiation by backward channel 1 and forward path, the one number service CSC AS of called subscriber B is CSC calling party D owing to trigger condition satisfied (such as overtime CSC), set up backward channel 2, and release backward channel 1, and owing to carrying out the media negotiation of calling subscriber A and user N in the forward path, do not propose/reply (offer/answer) model in the situation that finish, can't carry out the media negotiation of calling subscriber A and user D.
Figure 2 shows that when forward path carries out media negotiation, called subscriber B CSC trigger condition satisfies, and the Signalling exchange that the one number service CSC AS of called subscriber B carries out comprises:
201: the one number service CSC AS of called subscriber B (is called for short: AS) send release message (Cancel) to user N;
202:AS sends to user D and invites (Invite) message, sets up backward channel 2;
203: after user D received Invite message, the response message (18x) to AS returns Invite message carried the media information of himself in 18x message;
After 203:AS receives 18x message, owing to not finishing the offer/answer model in the forward path, the 18x message of carrying the media of user D calling subscriber A can't be sent to, media negotiation can't be carried out, the CSC call failure.
The problems referred to above also may occur in calling subscriber A and called subscriber B when carrying out media negotiation, call out and transfer to user C, cause the situations such as service fail owing to can't carry out the media negotiation of calling subscriber A and user C.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method and system that realize transfer class service, when solution calling subscriber and a user carry out media negotiation, third party user is transferred in calling, owing to can't carry out the problem that calling subscriber and third party user's media negotiation causes service fail.
For solving the problems of the technologies described above, a kind of method that realizes transfer class service of the present invention comprises:
Calling subscriber and the second user carry out media negotiation;
When trigger condition satisfies, the application server AS of transfer class service transfers the call to third party user, the proposal offer/ that finishes the media negotiation that calling subscriber and the second user carry out replys the answer model, carries out calling subscriber and third party user's media negotiation.
Further, before trigger condition satisfies, if the AS of transfer class service has sent the media update request of the media information carried the calling subscriber to the second user, the method for then finishing the offer/answer model of the media negotiation that calling subscriber and the second user carry out is:
The AS of transfer class service sends media to the calling subscriber and upgrades response, upgrades the false media that carry in the response according to calling subscriber's media information structure at these media.
Further, satisfy in trigger condition, when the AS of transfer class service transfers the call to third party user, if the AS of transfer class service receives the media update request of calling subscriber's the media information that carries this calling subscriber, the method for then finishing the offer/answer model of the media negotiation that calling subscriber and the second user carry out is:
The AS of transfer class service sends media to the calling subscriber and upgrades response, upgrades the false media that carry in the response according to calling subscriber's media information structure at these media.
Further, before trigger condition satisfied, if the AS of transfer class service sends the media update request to the calling subscriber, the method for then finishing the offer/answer model of the media negotiation that calling subscriber and the second user carry out was:
After the AS of transfer class service received calling subscriber's media renewal response, these media that terminate upgraded response.
Further, before trigger condition satisfies, if the AS of transfer class service sends the media update request to the calling subscriber, then finish the offer/answer model of the media negotiation that calling subscriber and the second user carry out, the method for carrying out calling subscriber and third party user's media negotiation is:
After the AS of transfer class service receives the 3rd user's response message, the 3rd user's who carries in this response message of buffer memory media information;
After the AS of transfer class service received calling subscriber's media renewal response, these media that terminate upgraded response;
The AS of transfer class service sends to the calling subscriber with the 3rd user's of buffer memory media information.
Further, a kind of system that realizes transfer class service comprises: the AS of calling subscriber, the second user, the 3rd user and transfer class service, wherein:
The AS of transfer class service, be used for carrying out media negotiation and trigger condition when satisfying calling subscriber and the second user, transfer the call to third party user, finish the offer/answer model of the media negotiation that calling subscriber and the second user carry out, carry out calling subscriber and third party user's media negotiation.
Further, the AS of transfer class service also is used for satisfying the media update request that forward direction the second user sends the media information that carries the calling subscriber in trigger condition;
The method that the AS of transfer class service finishes the offer/answer model of the media negotiation that calling subscriber and the second user carry out is: send media to the calling subscriber and upgrade response, upgrade the false media that carry in the response according to calling subscriber's media information structure at these media.
Further, the AS of transfer class service also is used for satisfying in trigger condition, when transferring the call to third party user, receives the media update request of calling subscriber's the media information that carries this calling subscriber;
The method that the AS of transfer class service finishes the offer/answer model of the media negotiation that calling subscriber and the second user carry out is: send media to the calling subscriber and upgrade response, upgrade the false media that carry in the response according to calling subscriber's media information structure at these media.
Further, the AS of transfer class service also is used for sending the media update request to the calling subscriber before trigger condition satisfies;
The method that the AS of transfer class service finishes the offer/answer model of the media negotiation that calling subscriber and the second user carry out is: after the media that receive the calling subscriber upgraded response, these media that terminate upgraded response.
Further, the AS of transfer class service also is used for sending the media update request to the calling subscriber before trigger condition satisfies;
The AS of transfer class service finishes the offer/answer model of the media negotiation that calling subscriber and the second user carry out, and the method for carrying out calling subscriber and third party user's media negotiation is:
After receiving the 3rd user's response message, the 3rd user's who carries in this response message of buffer memory media information; After the media that receive the calling subscriber upgraded and respond, these media that terminate upgraded response; The 3rd user's of buffer memory media information is sent to the calling subscriber.
In sum, the present invention finishes the offer/answer model of the media negotiation that the calling subscriber carries out in forward path, thereby makes the calling subscriber carry out media negotiation with the third party user that calling is transferred to, to realize call switching business.
Description of drawings
Fig. 1 is the calling access diagram of one number service sequential ringing service in the prior art;
Fig. 2 is the signaling diagram that triggers transfer class service when the calling subscriber carries out media negotiation in the prior art;
Fig. 3 is the Signalling exchange figure of the embodiment of the invention 1;
Fig. 4 is the Signalling exchange figure of the embodiment of the invention 2;
Fig. 5 is the Signalling exchange figure of the embodiment of the invention 3;
Fig. 6 is the Signalling exchange figure of the embodiment of the invention 4;
Fig. 7 is the Organization Chart of system of the present invention.
Embodiment
After triggering transfer class service, because the uniqueness of forward path, need the third party user who uses this forward path and calling to transfer to carry out media negotiation, if and the media negotiation that the calling subscriber carries out in the forward path is not yet finished, just can't carry out calling subscriber and the media negotiation of calling out the third party user who transfers to, the present invention finishes the offer/answer model of the media negotiation that the calling subscriber carries out at forward path, and then carries out calling subscriber and the media negotiation of calling out the third party user who transfers to.
Below in conjunction with accompanying drawing specific implementation method of the present invention is described.
The below still calls out called subscriber B with calling subscriber A, and called subscriber B is signatory an one number service sequential ringing service, and CSC is to user C, user D and user E, and user C is also signatory, and forward class business or one number service sequential ringing service are arranged is example, and method of the present invention is described.
Embodiment 1:
Figure 3 shows that when the trigger condition of CSC calling party D satisfies, AS sends in the situation of media update request to user N, realizes the method for the media negotiation of calling subscriber A and user D, comprising:
After 301:AS receives the media information of calling subscriber A, send media update requests (offer) to user N, carry the media information of calling subscriber A in this media update request;
302: the trigger condition of CSC calling party D satisfies, and AS sends media to calling subscriber A and upgrades response (answer), upgrades the false media of the media information structure of the calling subscriber A that carries in carrying according to offer in the response at media;
After calling subscriber A received media renewal response, the media working method was in inactive (inactive) state, no longer carries out media negotiation with user N, and the offer/answer model in the forward path is finished, and can carry out media negotiation.
303:AS sends release message to user N;
304:AS sends Invite message to user D;
305: after user D receives Invite message, return the response message of Invite message to AS, in this response message, carry the media information of himself;
After 306:AS receives the response message of user D, by forward path the media information of user D is sent to calling subscriber A, carry out media negotiation.
Embodiment 2:
Figure 4 shows that behind CSC calling party D, AS receives the media update request of calling subscriber A, realize the method for the media negotiation of calling subscriber A and user D, comprising:
401: the trigger condition of CSC calling party D satisfies, and AS sends release message to user N;
402:AS sends Invite message to user D;
403: calling subscriber A sends the media update request to AS, carries the media information of calling subscriber A;
After 404:AS receives the media update request of calling subscriber A, send media to calling subscriber A and upgrade response, upgrade the false media of the media structure of the calling subscriber A that carries in carrying according to offer in the response at media;
405: user D returns the response message of Invite message to AS, carry the media information of himself in this response message;
After 406:AS receives the response message of user D, by forward path the media information of user D is sent to calling subscriber A, carry out media negotiation.
Embodiment 3:
Figure 5 shows that before the trigger condition of CSC calling party D satisfied, AS sent in the situation of media update request to calling subscriber A, realizes the method for the media negotiation of calling subscriber A and user D, comprising:
501:AS sends the media update request to calling subscriber A, carries the media information of user N in this media update request;
502: the trigger condition of CSC calling party D satisfies, and AS sends release message to user N;
503:AS sends Invite message to user D;
504: calling subscriber A returns media to AS and upgrades response;
After 505:AS received the media renewal response of calling subscriber A, these media that terminate upgraded response, and namely no longer forwarding media upgrades the media information that carries in the response message;
The media that AS receives calling subscriber A upgrade response, and the termination media upgrade response and show that the offer/answer model in the forward path finishes, no longer carry out the media negotiation of calling subscriber A and user N, therefore, can carry out the media negotiation of calling subscriber A and user D.
506: user D returns the response message of Invite message to AS, carry the media information of himself in this response message;
After 507:AS receives the response message of user D, by forward path the media information of user D is sent to calling subscriber A, carry out media negotiation.
Embodiment 4:
Figure 6 shows that before the trigger condition of CSC calling party D satisfies, AS sends the media update request to calling subscriber A, and the media that do not receive calling subscriber A before receiving the response message of user D to Invite message upgrade in the situation of response, realize the method for the media negotiation of calling subscriber A and user D, comprising:
601:AS sends the media update request to calling subscriber A, carries the media information of user N in this media update request;
602: the trigger condition of CSC calling party D satisfies, and AS sends release message to user N;
603:AS sends Invite message to user D;
604: user D returns the response message of Invite message to AS, carry the media information of himself in this response message;
The media information of the user D that carries in the response message of the Invite message that 605:AS cache user D returns;
606: calling subscriber A returns media to AS and upgrades response;
After 607:AS received the media renewal response of calling subscriber A, these media that terminate upgraded response message, and namely no longer forwarding media upgrades the media information that carries in the response message;
608:AS sends to calling subscriber A with the media information of the user D of buffer memory by forward path, carries out media negotiation.
Figure 7 shows that the system of realization transfer class service of the present invention, comprising: the AS of calling subscriber, the second user, the 3rd user and transfer class service, wherein:
The calling subscriber is used for carrying out media negotiation with the second user;
The AS of transfer class service is used for transferring the call to third party user when trigger condition satisfies, and finishes the offer/answer model of the media negotiation that calling subscriber and the second user carry out, and carries out calling subscriber and third party user's media negotiation.
The AS of transfer class service also is used for satisfying the media update request that forward direction the second user sends the media information that carries the calling subscriber in trigger condition;
The method that the AS of transfer class service finishes the offer/answer model of the media negotiation that calling subscriber and the second user carry out is: send media to the calling subscriber and upgrade response, upgrade the false media that carry in the response according to calling subscriber's media information structure at these media.
The AS of transfer class service also is used for satisfying in trigger condition, when transferring the call to third party user, receives the media update request of calling subscriber's the media information that carries this calling subscriber;
The method that the AS of transfer class service finishes the offer/answer model of the media negotiation that calling subscriber and the second user carry out is: send media to the calling subscriber and upgrade response, upgrade the false media that carry in the response according to calling subscriber's media information structure at these media.
The AS of transfer class service also is used for sending the media update request to the calling subscriber before trigger condition satisfies;
The method that the AS of transfer class service finishes the offer/answer model of the media negotiation that calling subscriber and the second user carry out is: after the media that receive the calling subscriber upgraded response, these media that terminate upgraded response.
The AS of transfer class service also is used for sending the media update request to the calling subscriber before trigger condition satisfies;
The AS of transfer class service finishes the offer/answer model of the media negotiation that calling subscriber and the second user carry out, and the method for carrying out calling subscriber and third party user's media negotiation is:
After receiving the 3rd user's response message, the 3rd user's who carries in this response message of buffer memory media information; After the media that receive the calling subscriber upgraded and respond, these media that terminate upgraded response; The 3rd user's of buffer memory media information is sent to the calling subscriber.
Certainly; the present invention also can have other various embodiments; in the situation that do not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (10)
1. method that realizes transfer class service comprises:
Calling subscriber and the second user carry out media negotiation;
When trigger condition satisfies, the application server AS of transfer class service transfers the call to the 3rd user, the proposal offer/ that finishes first the media negotiation that described calling subscriber and the second user carry out replys the answer model, carries out described calling subscriber and described the 3rd user's media negotiation again.
2. the method for claim 1, it is characterized in that, before described trigger condition satisfies, if the AS of described transfer class service has sent the media update request of the media information carried described calling subscriber to the second user, then the described method of finishing the offer/answer model of the media negotiation that described calling subscriber and the second user carry out is:
The AS of described transfer class service sends media to described calling subscriber and upgrades response, upgrades the false media that carry in the response according to described calling subscriber's media information structure at these media.
3. the method for claim 1, it is characterized in that, satisfy in trigger condition, when the AS of transfer class service transfers the call to the 3rd user, if the AS of described transfer class service receives the media update request of described calling subscriber's the media information that carries this calling subscriber, then the described method of finishing the offer/answer model of the media negotiation that described calling subscriber and the second user carry out is:
The AS of described transfer class service sends media to described calling subscriber and upgrades response, upgrades the false media that carry in the response according to described calling subscriber's media information structure at these media.
4. the method for claim 1, it is characterized in that, before described trigger condition satisfies, if the AS of described transfer class service sends the media update request to described calling subscriber, then the described method of finishing the offer/answer model of the media negotiation that described calling subscriber and the second user carry out is:
After the AS of described transfer class service received described calling subscriber's media renewal response, these media that terminate upgraded response.
5. the method for claim 1, it is characterized in that, before described trigger condition satisfies, if the AS of described transfer class service sends the media update request to described calling subscriber, the described offer/answer model of finishing the media negotiation that described calling subscriber and the second user carry out then, the method for carrying out described calling subscriber and described the 3rd user's media negotiation is:
After the AS of described transfer class service receives described the 3rd user's response message, described the 3rd user's who carries in this response message of buffer memory media information;
After the AS of described transfer class service received described calling subscriber's media renewal response, these media that terminate upgraded response;
The AS of described transfer class service sends to described calling subscriber with described the 3rd user's of buffer memory media information.
6. system that realizes transfer class service comprises: the AS of calling subscriber, the second user, the 3rd user and transfer class service, wherein:
The AS of described transfer class service, be used for carrying out media negotiation and trigger condition when satisfying described calling subscriber and described the second user, transfer the call to described the 3rd user, finish first the offer/answer model of the media negotiation that described calling subscriber and the second user carry out, carry out again described calling subscriber and described the 3rd user's media negotiation.
7. system as claimed in claim 6 is characterized in that,
The AS of described transfer class service also is used for satisfying the media update request that forward direction the second user sends the media information that carries described calling subscriber in described trigger condition;
The method that the AS of described transfer class service finishes the offer/answer model of the media negotiation that described calling subscriber and the second user carry out is: send media to described calling subscriber and upgrade response, upgrade the false media that carry in the response according to described calling subscriber's media information structure at these media.
8. system as claimed in claim 6 is characterized in that,
The AS of described transfer class service also is used for satisfying in trigger condition, when transferring the call to the 3rd user, receives the media update request of described calling subscriber's the media information that carries this calling subscriber;
The method that the AS of described transfer class service finishes the offer/answer model of the media negotiation that described calling subscriber and the second user carry out is: send media to described calling subscriber and upgrade response, upgrade the false media that carry in the response according to described calling subscriber's media information structure at these media.
9. system as claimed in claim 6 is characterized in that,
The AS of described transfer class service also is used for sending the media update request to described calling subscriber before described trigger condition satisfies;
The method that the AS of described transfer class service finishes the offer/answer model of the media negotiation that described calling subscriber and the second user carry out is: after the media that receive described calling subscriber upgraded response, these media that terminate upgraded response.
10. system as claimed in claim 6 is characterized in that,
The AS of described transfer class service also is used for sending the media update request to described calling subscriber before described trigger condition satisfies;
The AS of described transfer class service finishes the offer/answer model of the media negotiation that described calling subscriber and the second user carry out, and the method for carrying out described calling subscriber and described the 3rd user's media negotiation is:
After receiving described the 3rd user's response message, described the 3rd user's who carries in this response message of buffer memory media information; After the media that receive described calling subscriber upgraded and respond, these media that terminate upgraded response; The 3rd user's of buffer memory media information is sent to described calling subscriber.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910138483.0A CN101567797B (en) | 2009-05-20 | 2009-05-20 | Method and system for realizing transfer class service |
| PCT/CN2010/072716 WO2010133146A1 (en) | 2009-05-20 | 2010-05-13 | Method, system, and apparatus for implementing transfer class service |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910138483.0A CN101567797B (en) | 2009-05-20 | 2009-05-20 | Method and system for realizing transfer class service |
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| CN101567797B true CN101567797B (en) | 2013-02-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101150580A (en) * | 2007-10-19 | 2008-03-26 | 中兴通讯股份有限公司 | A number receiving method in session initialization protocol |
| CN101248641A (en) * | 2005-06-13 | 2008-08-20 | 诺基亚西门子通信有限责任两合公司 | Method for controlling the user facility 'sip call-transfer' |
| CN101431737A (en) * | 2007-11-05 | 2009-05-13 | 华为技术有限公司 | Multimedia conversation call control method and application server thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101198089B (en) * | 2006-12-07 | 2010-09-22 | 华为技术有限公司 | Method and system for implementing call forwarding service, and voice call continuous server |
| CN101567797B (en) * | 2009-05-20 | 2013-02-27 | 中兴通讯股份有限公司 | Method and system for realizing transfer class service |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101248641A (en) * | 2005-06-13 | 2008-08-20 | 诺基亚西门子通信有限责任两合公司 | Method for controlling the user facility 'sip call-transfer' |
| CN101150580A (en) * | 2007-10-19 | 2008-03-26 | 中兴通讯股份有限公司 | A number receiving method in session initialization protocol |
| CN101431737A (en) * | 2007-11-05 | 2009-05-13 | 华为技术有限公司 | Multimedia conversation call control method and application server thereof |
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| WO2010133146A1 (en) | 2010-11-25 |
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