CN101448221A - Method for call state supporting early-session - Google Patents
Method for call state supporting early-session Download PDFInfo
- Publication number
- CN101448221A CN101448221A CNA2008100906345A CN200810090634A CN101448221A CN 101448221 A CN101448221 A CN 101448221A CN A2008100906345 A CNA2008100906345 A CN A2008100906345A CN 200810090634 A CN200810090634 A CN 200810090634A CN 101448221 A CN101448221 A CN 101448221A
- Authority
- CN
- China
- Prior art keywords
- session
- early
- called
- media
- application server
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 45
- 239000002131 composite material Substances 0.000 claims abstract description 24
- 230000008569 process Effects 0.000 claims abstract description 17
- 239000013028 medium composition Substances 0.000 claims description 38
- 230000004044 response Effects 0.000 claims description 13
- 230000011664 signaling Effects 0.000 claims description 13
- 230000000977 initiatory effect Effects 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 6
- 239000000203 mixture Substances 0.000 description 8
- 101000884263 Escherichia coli (strain K12) Asparagine synthetase B [glutamine-hydrolyzing] Proteins 0.000 description 5
- 230000008901 benefit Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000012533 medium component Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Images
Abstract
The invention discloses a method for call state supporting an early-session. In the method, called side early-session playback is compatible, and the method also satisfies session media negotiation and resource reservation during the process of establishing a call. In the method, during the media negotiation, SDPs of early-session and session are integrated as a composite SDP to be sent to a call state calling terminal; the call state calling terminal finishes the work of media negotiation, link establishment, resource reservation and the like before a called party ringing; after the called party ringing, the early-session is used as calling playback; and after the called party picks up a telephone, the session is activated to carry out session negotiation, and the call stars after the negotiation.
Description
Technical field
The present invention relates to communication technique field, relating in particular to session initiation protocol and be SIP (SessionInitiation Protocol) is that SDP (Session Description Protocol) sets up in the communication system of session with Session Description Protocol, is in the method for supporting early-session under the situation of conversation state at user terminal.
Background technology
Early-session i.e. " Early-Session " is meant that a kind of calling procedure in SIP communication is deployed in formal session (Regular Session, the general Session of abbreviation) session of using Early media to set up before setting up, typical application scenarios be application server (AS) by Early-Session to calling UE (user terminal) playing RBT, CRBT sound.Early-Session can solve AS preferably and insert Early media (Early Media) carry out the playback problem in call establishment, consult when can realize the medium of Early media and formal session (Regular Session), and can avoid the problem of audio mixing.The session invitation that makes a call (Invite) is finally responded, and after formal session was set up, early-session can be terminated automatically, and Early-Session then can not use in conversation state.
Have a kind of like this application scenarios: the calling subscriber has entered conversation state, and AS (application server) need with this user be transferred to one new called.As: the blind commentaries on classics in the call switching business, two users of A, C have set up conversation, C user is with the blind user B that forwards to of A, C user triggers the conversation of the local terminal that has been through with after the business, and this moment, user B just was in the stage of exhaling, the application server of callee side can use the Early-Session playing RBT, and formal session (Session) medium of called user terminal need to carry out media negotiation, resource reservation simultaneously simultaneously.And calling subscriber A can only use the media negotiation of formal session (Session) owing to be in conversation state.
In the above-mentioned scene, set up, only abandon the callee side early-session generally speaking, carry out the end-to-end negotiation of the formal medium of calling and called for guaranteeing formal conversation.And the process that needs through phone ring, user's off-hook is set up in called conversation, this process generally needs tens seconds time, and the calling subscriber can only be in mute state because original session with C user of setting up has stopped in this course, causes bad user experience.
If the expectation calling subscriber hears the ring-back tone that callee side AS plays, CRBT sound in above-mentioned scene.Then need the Early-Session under the compatible conversation state to consult, must finish the negotiation and the resource reservation of the formal medium of calling and called simultaneously, could set up formal session.
Existing resolution policy carries out media negotiation with early-session (Early-Session) and formal session (Session) substep, set up in the process in the conversation of callee side, for allowing caller hear the playback of Early media, caller AS adopts the negotiation mode of B2BUA (back-to-back user agent), the Early-Session of earlier callee side being put ring-back tone converts Session to and brings caller, uses a virtual SDP and called Session negotiation simultaneously.This step is that the early media negotiation of calling terminal A and callee side is listened the process of ring-back tone before conversation is set up, concrete signaling process as shown in Figure 1, description is the call establishment that the user A that will be in conversation state is transferred to user B among the figure.Step 3 is to step 18 among the figure, and the early media negotiation that has shown the conversation media of calling subscriber A and callee side is set up session and listened ring-back tone; Caller AS uses virtual media and called subscriber B to set up session, makes the process of user B ring off-hook.
Caller AS with calling subscriber's medium handoff procedure in, step 5 and step 18 all are respectively that the Early-Session media conversion with callee side becomes the Session medium to give calling terminal, in this process calling terminal actual be to set up media channel with the media server of callee side playback to listen a ring-back tone, CRBT sound.And calling terminal does not obtain the medium of terminal called.Caller AS with called subscriber's media consultation process in, step 4 and step 17 are respectively that virtual media and the called Session that AS uses consults, and the Early-Session of Session medium that caller is taken back and callee side consults so that callee side Early Media gives the calling terminal playing RBT, wherein virtual media is the media description that contains virtual information according to the media information structure of Calling Side, its purpose just is to use virtual media to think by terminal called and finishes ring behind the medium, so that called subscriber's off-hook.In fact terminal called does not equally obtain the medium of caller yet in this course.
After conversation was set up, because calling and called all do not obtain the medium of opposite end, formal session was not set up.Therefore AS need need carry out resource reservation again to the main media negotiation of initiating formal session that cried again, and calling and called could be set up formal session after media negotiation was finished.
Above-mentioned resolution policy subject matter be in the first step with called Session media negotiation be virtual, and behind off-hook, also need to consult again the calling and called medium, can have following three problems like this:
(1) virtual medium can't be realized resource reservation end to end, and because an end is virtual medium, the information in the virtual medium may occur in the resource reservation process of bearing bed unusually;
(2) behind called off-hook, calling and called all do not have the medium of opposite end, again in the negotiations process, if there is wireless side, the resource reservation time of calling and called is long, run counter to the original idea of Precondition (in advance mutual), can have the phenomenon of more serious Media Clip (media break, quiet);
(3) if in the process that the calling and called medium are consulted again, the calling and called media negotiation is unsuccessful, and then conversation can't be set up.
Summary of the invention
Technical problem to be solved by this invention is, a kind of method of call state supporting early-session is provided, can't be for the calling terminal playing RBT when being used for overcoming prior art and calling out switching, negotiation time is long or problem such as media break.
The invention provides a kind of method of call state supporting early-session, support early-session when in the communication system that comprises calling terminal, terminal called, calling and called application server, realizing being in the calling terminal switching terminal called of conversation state, comprise the steps:
Step 1, in switching process, after the caller application server is received early-session and formal two sections media descriptions of session in the session initiation protocol signaling of callee side, the media description of formal session is changed to non-activated state and described two sections media descriptions are merged into composite session send to described calling terminal;
Step 2, described calling terminal are resolved the described composite session that receives, media description to the formal session that wherein is changed to non-activated state carries out resource reservation and sets up link connecting, after the media description of early-session carried out resource reservation, media negotiation, composite session is replied, and the media description information that calling terminal is replied sends to the caller application server;
After step 3, caller application server are received replying of calling terminal, composite session is resolved, separates to obtain early-session media description that calling terminal replys and formal conversation media and describe and it is fed back to callee side application server and terminal called:
Step 4, before called off-hook, be that calling terminal carries out the Early media playback by the media description of called server by utilizing early-session;
Step 5, behind called off-hook, the caller application server is changed to activated state with the media description of formal session and is sent to calling terminal, calling terminal and terminal called carry out entering conversation behind the media negotiation.
Further, in step 1, before the caller application server was received early-session and formal two sections media descriptions of session in the session initiation protocol signaling of callee side, this method also comprised:
When calling terminal had entered conversation state and need be forwarded to idle terminal called, the caller application server sent not session invitation with medium through called application server to terminal called;
Described terminal called carries the formal conversation media of terminal called to described called application server by response message;
Described called application server is sent to described caller application server after the early-session medium are inserted described response message.
Further, in step 1, after the caller application server is received early-session and formal two sections media descriptions of session in the session initiation protocol signaling of callee side, described caller application server is changed to the non-activated state that expression wouldn't be used with the media description of formal session, and described two sections media descriptions are merged into composite session send to described calling terminal, be the medium composition in the early-session to be merged into a composite session with the medium composition of formal session send to described calling terminal during merging.
Further, in step 2, after carrying the composite session of the described early-session and the media description of formal session, separate described early-session media description and formal conversation media description, the medium composition that is set to non-activated state is carried out resource reservation and sets up link; The early-session media description is carried out resource reservation and media negotiation, described composite session is replied, the Calling Side media description information is sent to the caller application server.
Further, in the step 3, after described caller application server is received replying of calling terminal, medium composition, link information row, the medium that actual and called early-session is consulted are capable, property column takes out, the early-session media description that provides according to terminal called described in the step 1, be configured to replying of early-session, the formal conversation media of calling terminal is reduced into replying of formal session that terminal called in the step 1 is provided, and the media state of formal session is reduced to activated state by non-activated state.
Further, in the step 5, behind the terminal called off-hook, the caller application server of transfer service sends again to calling terminal, and invitation is that Re-Invite message is carried medium, and will before calling terminal be used for listening the medium composition port zero setting of called early-session playback, the medium of formal session are become to split activated state.
Comprise a plurality of link information row, the different medium composition of medium line display in the media description of described composite session.
Described step 5 further comprises:
If the result who consults in the port of the formal conversation media composition of caller and the step 2 compares change, the caller application server is then initiated the medium of the session of calling and called terminal room and is consulted again.
Adopt method of the present invention, advantage is that calling and called can be set up in conversation and has really carried out media negotiation and resource reservation end to end in the process, caller is the compatible Early-Session playback of callee side under conversation state, and the maximized possibility that has reduced Media Clip (media break, quiet) behind called subscriber's off-hook.After " inactive " is set, in whole media consultation process, reduce the possibility of Session passage switching media port, avoid the vibration of media negotiation to a certain extent.
Description of drawings
Fig. 1 realizes the flow chart of blind transferring operation by terminal in conversation state calling terminal called in the prior art;
Fig. 2 realizes the flow chart of blind transferring operation by terminal in conversation state calling terminal called among the present invention;
Fig. 3 be in the embodiment of the invention in the blind transferring operation handshaking procedure calling and called set up the signaling process figure that conversation and compatible Early-Session listen ring-back tone.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
Early-Session is put in the SIP/SDP communication system of ring-back tone in use, if calling terminal enters conversation state and is relayed under the scene of terminal called, by adopting constructing virtual SDP mode to make calling terminal listen called Early-Session playback, make the problem of the slow and user experience difference of switching speed in the prior art.For this reason, the invention provides a kind of compatible with called side Early-Session playback, satisfy the forwarding method that Session media negotiation in the process and resource reservation are set up in conversation simultaneously.
For achieving the above object, need carry out compatibility to the SDP of the Early-Session of callee side at Calling Side AS, because one section SDP can comprise multiple different medium composition, Early-Session and Session follow the SDP agreement simultaneously, and Offer/Answer (providing/reply) interaction models is provided.Therefore, main innovate point of the present invention is when media negotiation, the SDP of early-session Early-Session and formal session Session is merged into a composite S DP send to the conversation state calling terminal, before called terminal ringing, carry out work such as media negotiation, link establishment, resource reservation in advance by the conversation state calling terminal, behind called terminal ringing, use early-session to be calling audio playback, behind called off-hook, then activate formal session and carry out session negotiation, enter conversation after consulting to finish.
As shown in Figure 2, described forwarding method is used for comprising comprising the steps: the communication system of calling terminal, terminal called, calling and called application server
Step 201: the caller application server is changed to the media description of formal session non-activated state and described early-session and formal two sections media descriptions of session is merged into composite session and sends to described calling terminal;
Behind two sections SDP of Early-Session that the caller application server AS is carried in receiving callee side SIP signaling and Session, caller AS describes two sections SDP and operates, medium composition among the SDP of Session is changed to " inactive ", represent that this section medium composition does not temporarily use, again with among the Early-Session with the medium composition be incorporated among the SDP of Session, form a new SDP and send to calling terminal as Session.
Step 202: calling terminal is resolved described composite session, media description to the formal session that is changed to non-activated state carries out resource reservation and sets up link connecting, after the media description of early-session carried out resource reservation, media negotiation, composite session is replied, and the media description information that calling terminal is replied sends to the caller application server;
Calling terminal is resolved a plurality of medium compositions among this section SDP.To being set to the medium composition of " inactive ",, and on the RTCP link, connect according to RFC3264 caller needs resource reservation still.But can not change " inactive " state in the medium composition.Be that calling terminal needs simultaneously a plurality of medium compositions in the Session medium to be carried out resource reservation, media negotiation.Except that " inactive " medium composition that wouldn't use, calling terminal also needs to do corresponding media negotiation with the medium composition of " active " simultaneously to be handled.Calling terminal to Session SDP do reply after, the media description information of Calling Side is given to caller AS.
Step 203: the caller application server is resolved composite session after receiving replying of calling terminal, separates to obtain early-session media description that calling terminal replys and formal conversation media and describe and it is fed back to callee side application server and terminal called.
After caller AS receives replying of calling terminal, the Session SDP that replys is done parsing, carries out fractured operation according to the middle attribute status of different medium compositions wherein:
The medium composition that is not changed to " inactive " then is corresponding called Early-Session, and the medium composition that is changed to " inactive " then is the Session SDP of corresponding called AS;
After corresponding medium component separation among the SDP that calling terminal is replied is come out, be reduced to the SDP of Early-Session, and medium " inactive " state of Session SDP is reduced to " active " state.Again Session and two sections SDP of Early-Session are sent to callee side.
Step 204: before called off-hook, be that calling terminal carries out the Early media playback by the media description of called server by utilizing early-session;
Before the terminal called off-hook, calling terminal has been set up passage with the back to Early Media, and the calling subscriber can hear the Early-Session playback of callee side.The Session medium of calling and called have also carried out resource reservation simultaneously, and according to RFC3261, owing to called medium are changed to " inactive " at Calling Side, therefore calling terminal can not send the medium bag to terminal called, initial session invitation to the called subscriber is finally responded, promptly before called off-hook, the called medium bag that also do not have sends.
Step 205: behind called off-hook, the caller application server is changed to activated state with the media description of formal session and is sent to calling terminal, and calling terminal and terminal called carry out entering conversation behind the media negotiation.
Behind the called off-hook, callee side Early-Session media channel stops automatically, AS sends Re-Invite to calling terminal and carries medium activated be changed to " active " of medium with called final negotiation, the notice calling terminal uses called medium, port zero setting in the medium composition of consulting with called Early-Session, promptly be that this section medium are removed from session, thereby calling and called are finished the foundation of session just.This process only needs less time and Signalling exchange, influences the calling and called user experience hardly.
Adopt method that above-mentioned this patent describes can enter the Early-Session of compatible with called side under the situation of conversation state, finish the negotiation and the resource reservation of Early-Session and Session medium simultaneously, and so the audio mixing phenomenon can not occur in caller.
Below in conjunction with accompanying drawing 3, to the application of the present invention in the blind transferring operation handshaking procedure be elaborated (wherein step 4 to step 12 is a main innovation content of the present invention).Wherein:
UE_A is a call subscriber terminal, and the party A-subscriber has entered conversation state; UE_B is a called user terminal, and B is in idle condition; Caller application server AS (A) in blind transferring operation adopts the tupe of B2BUA (back-to-back user agent) that user A is transferred to called subscriber B; AS (B) is called application server, and in the call establishment of B, AS (B) inserts Early-Session puts ring-back tone, CRBT sound.In flow chart shown in Figure 2, for convenience, omitted the relevant SIP signaling that triggers transfer service, only the relevant Signalling exchange of descriptive session call setup.
With reference to Fig. 3, realize among the present invention that the signaling process of calling out switching in the blind transferring operation comprises the steps:
Step 1～2:
Calling subscriber A has entered conversation state, caller AS needs the user A that will be in conversation state to be transferred to called subscriber B, thereby caller AS (hereinafter to be referred as AS-A) sends not with the session invitation (Invite) of medium to called AS (hereinafter to be referred as AS-B), and called AS-B gives terminal called UE_B with the Invite forwards;
Step 3～4:
Terminal called UE_B replys 183 Temporary Responses to called application server AS-B, carry session (Session) medium of terminal called UE_B in the 183 Temporary Response message, called application server AS-B inserts early-session (Early-Session) medium in 183 Temporary Responses of receiving after, 183 Temporary Responses are transmitted to caller application server AS-A, are used for the preceding playing RBT of called off-hook conversation, CRBT;
Step 5:
Provide (OFFER) of the Early-Session medium that carry in 183 Temporary Responses that called application server AS-B sends and Session medium is provided caller application server AS-A, caller AS-A handles these two sections media descriptions, the Session medium are become to split " inactive (non-activated state) ", the Session Description Protocol bag SDP of Early-Session is integrated with among the Session, and 183 Temporary Responses are changed into Re-Invite to be re-invited, this Re-Invite re-invites and carries the Session medium that contain a plurality of medium compositions and issue caller (among Fig. 2 in the step 5: " m1=" represents former called Session medium composition, promptly be the Session medium composition of called subscriber B herein, " m2=" expression Early-Session medium composition).
During concrete operations, be that Session and two sections SDP of Early-Session (media description) that terminal called UE_B provides are merged.The SDP of Early-Session is incorporated among the Session SDP, forms one section Session SDP that comprises a plurality of medium compositions and offer call subscriber terminal UE_A.Keep the link information row (" c=" OK) among original Session SDP, it is capable to be contained in medium, only as the information of this section medium composition, the information contents such as QOS (service quality) row, medium property remain unchanged in the medium capable (" m=" OK), property column (" a=" OK).And " active (activated state) " of media state in original property column be changed to " inactive (non-activated state) " state.Link information row, medium in the media description among the Early-Session are capable, property column is increased to as new medium composition and is configured to new Session medium among the Session SDP.Comprise a plurality of link information row, the different medium composition of medium line display in the new Session media description.
Step 6-12: after calling terminal UE_A receives Re-Invite, carry out respective handling, in 183 responses, replying of Session medium sent to caller application server AS-A, caller AS receives the Session medium in 183, then according to " inactive " media state among the Session, isolate the medium composition of corresponding called playback, convert Early-Session to, and " inactive " state in the reduction Session medium composition, conversion 183 carries Early-Session for the affirmation message of called Temporary Response (Prack message) and two sections SDP of Session issue callee side.
Concrete operations be will not be changed to inactive the medium composition promptly: medium composition, link information row, the medium that actual and called Early Media consults are capable, property column takes out, reply (Answer) of Early-Session is provided according to the Early-Session media description that provides before called, reply (Answer) to the called Session of providing before is provided for the Session medium of caller, and the Session media state is reduced.Be configured to two sections media descriptions of Early-Session, Session replying as callee side.
Step 13-18: owing to be with confirm (affirmation) in the media descriptions of 183 responses, caller need be initiated Update and carry medium and confirm that the caller AS of transfer service makes and splits out the Early-Session medium in a like fashion, carries out media negotiation.
Step 19-26: the calling subscriber responded to the 200OK that caller AS sends Re-Invite after calling and called media negotiation, resource reservation were finished, and the called subscriber sends 180 ALERTING messages through called AS to caller AS and enters the ring attitude.Called AS indication this moment MRF media server carries out playback, and this moment, the calling subscriber then can hear the playback of callee side.
Step 27-33: behind the called off-hook, the caller AS of transfer service sends Re-Invite to the calling subscriber, carries medium, wherein will be used for listening the medium composition port zero setting of called Early-Session playback before, and the medium of Session become to split " active ".This moment, calling terminal was because the port zero setting of Early composition, then the Early composition being consulted media channel removes, because the media negotiation of called Session composition is finished, then open media channel after being changed to " active ", the 200OK that can directly return Re-Invite carries and replys, this moment, AS need judge whether the port of Session medium composition among the Answer does not change, generally speaking owing to consulted to finish before, then can not change, the formal session of calling and called this moment is just set up and is finished.
Also can exist the port of caller Session medium composition among the 200OK of 32 message and the result who consults before to change, AS then can initiate the Session medium of calling and called again and consult again.Need to prove in this case Media Clip may take place, but the probability that occurs relatively is less.
Described herein is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Therefore, all any modifications of being done within the spirit and principles in the present invention, be equal to replacement, improve and upgrade or the like, all should be included within protection scope of the present invention.
Claims (8)
1, a kind of method of call state supporting early-session, be used for when the communication system realization that comprises calling terminal, terminal called, calling and called application server is in the calling terminal switching terminal called of conversation state, supporting early-session, it is characterized in that, comprising:
Step 1, in switching process, after the caller application server is received early-session and formal two sections media descriptions of session in the session initiation protocol signaling of callee side, the media description of formal session is changed to non-activated state and described two sections media descriptions are merged into composite session send to described calling terminal;
Step 2, described calling terminal are resolved the described composite session that receives, media description to the formal session that wherein is changed to non-activated state carries out resource reservation and sets up link connecting, after the media description of early-session carried out resource reservation, media negotiation, composite session is replied, and the media description information that calling terminal is replied sends to the caller application server;
After step 3, caller application server are received replying of calling terminal, composite session is resolved, separates to obtain early-session media description that calling terminal replys and formal conversation media and describe and it is fed back to callee side application server and terminal called:
Step 4, before called off-hook, be that calling terminal carries out the Early media playback by the media description of called server by utilizing early-session;
Step 5, behind called off-hook, the caller application server is changed to activated state with the media description of formal session and is sent to calling terminal, calling terminal and terminal called carry out entering conversation behind the media negotiation.
2, the method for claim 1 is characterized in that:
Further, in step 1, before the caller application server was received early-session and formal two sections media descriptions of session in the session initiation protocol signaling of callee side, this method also comprised:
When calling terminal had entered conversation state and need be forwarded to idle terminal called, the caller application server sent not session invitation with medium through called application server to terminal called;
Described terminal called carries the formal conversation media of terminal called to described called application server by response message;
Described called application server is sent to described caller application server after the early-session medium are inserted described response message.
3, the method for claim 1 is characterized in that:
Further, in step 1, after the caller application server is received early-session and formal two sections media descriptions of session in the session initiation protocol signaling of callee side, described caller application server is changed to the non-activated state that expression wouldn't be used with the media description of formal session, and described two sections media descriptions are merged into composite session send to described calling terminal, be the medium composition in the early-session to be merged into a composite session with the medium composition of formal session send to described calling terminal during merging.
4, the method for claim 1 is characterized in that:
Further, in step 2, after carrying the composite session of the described early-session and the media description of formal session, separate described early-session media description and formal conversation media description, the medium composition that is set to non-activated state is carried out resource reservation and sets up link; The early-session media description is carried out resource reservation and media negotiation, described composite session is replied, the Calling Side media description information is sent to the caller application server.
5, the method for claim 1 is characterized in that:
Further, in the step 3, after described caller application server is received replying of calling terminal, medium composition, link information row, the medium that actual and called early-session is consulted are capable, property column takes out, the early-session media description that provides according to terminal called described in the step 1, be configured to replying of early-session, the formal conversation media of calling terminal is reduced into replying of formal session that terminal called in the step 1 is provided, and the media state of formal session is reduced to activated state by non-activated state.
6, the method for claim 1 is characterized in that:
Further, in the step 5, behind the terminal called off-hook, the caller application server of transfer service sends again to calling terminal, and invitation is that Re-Invite message is carried medium, and will before calling terminal be used for listening the medium composition port zero setting of called early-session playback, the medium of formal session are become to split activated state.
7, the method for claim 1 is characterized in that:
Comprise a plurality of link information row, the different medium composition of medium line display in the media description of described composite session.
8, the method for claim 1 is characterized in that, described step 5 further comprises:
If the result who consults in the port of the formal conversation media composition of caller and the step 2 compares change, the caller application server is then initiated the medium of the session of calling and called terminal room and is consulted again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100906345A CN101448221B (en) | 2008-04-02 | 2008-04-02 | Method for call state for supporting early-session |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100906345A CN101448221B (en) | 2008-04-02 | 2008-04-02 | Method for call state for supporting early-session |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101448221A true CN101448221A (en) | 2009-06-03 |
| CN101448221B CN101448221B (en) | 2011-05-25 |
Family
ID=40743552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100906345A Expired - Fee Related CN101448221B (en) | 2008-04-02 | 2008-04-02 | Method for call state for supporting early-session |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101448221B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101854616A (en) * | 2010-05-31 | 2010-10-06 | 中兴通讯股份有限公司 | Media negotiation method in call forwarding and call forwarding application server |
| CN103957199A (en) * | 2014-04-16 | 2014-07-30 | 北京佳讯飞鸿电气股份有限公司 | Method for optimizing multi-media call establishment time |
| CN101997856B (en) * | 2009-08-26 | 2014-12-10 | 中兴通讯股份有限公司 | Signaling message interaction method and application server |
| WO2015131441A1 (en) * | 2014-03-06 | 2015-09-11 | Mediatek Inc. | Method of call setup time reduction for voice over lte |
| CN113132923A (en) * | 2019-12-31 | 2021-07-16 | 华为技术有限公司 | Method, system and related device for processing call |
-
2008
- 2008-04-02 CN CN2008100906345A patent/CN101448221B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101997856B (en) * | 2009-08-26 | 2014-12-10 | 中兴通讯股份有限公司 | Signaling message interaction method and application server |
| CN101854616A (en) * | 2010-05-31 | 2010-10-06 | 中兴通讯股份有限公司 | Media negotiation method in call forwarding and call forwarding application server |
| WO2015131441A1 (en) * | 2014-03-06 | 2015-09-11 | Mediatek Inc. | Method of call setup time reduction for voice over lte |
| US9462618B2 (en) | 2014-03-06 | 2016-10-04 | Mediatek Inc. | Method of call setup time reduction for voice over LTE |
| CN103957199A (en) * | 2014-04-16 | 2014-07-30 | 北京佳讯飞鸿电气股份有限公司 | Method for optimizing multi-media call establishment time |
| CN113132923A (en) * | 2019-12-31 | 2021-07-16 | 华为技术有限公司 | Method, system and related device for processing call |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101448221B (en) | 2011-05-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100531267C (en) | Method for realizing echo in communication system | |
| CN100563282C (en) | The method of listening dailed signal sound at dail line terminal during network interworking | |
| CA2701960C (en) | A method for implementing a multimedia ring back tone service | |
| CN101079927B (en) | Method and system for realizing multimedia color image service in IP multimedia subsystem network | |
| CN101180866B (en) | Method of processing multiple ringback tone in voice service application based on SIP FORK | |
| CN100417288C (en) | Method of turning multimedia call back to speech call | |
| CN101141700B (en) | Multimedia color bell service implementing method | |
| JP2008544638A (en) | Method and apparatus for performing call setup | |
| CN101099366B (en) | Session initiation protocol intermediate node and the method to session initiation protocol terminal transmission information | |
| US20080273671A1 (en) | Method, system and application server for preventing crosstalk of color ring back tone | |
| CN101448221B (en) | Method for call state for supporting early-session | |
| JP5551786B2 (en) | Method, server and terminal device for playing multimedia ringer during conversation | |
| CN101026614B (en) | Media type parameter negotiation method | |
| CN101374175A (en) | Admission method and system for audio/video conference of IMS/NGN network | |
| CN101795330A (en) | Method, server and terminal device for playing multimedia ringing tone during call | |
| CN101232649B (en) | Communication system, application server and method for implementing same group answer replacing business | |
| CN102664863B (en) | Method, device, and system for realizing call waiting by user equipment | |
| CN101594598B (en) | Method and system for media negotiation in IMS network | |
| EP2249554B1 (en) | A method for realizing characteristic ring back tone in multi-party session | |
| CN101582950B (en) | Ringing state switching method and system in IP multimedia subsystem | |
| CN101448046A (en) | Call-establishing method for realizing single-conversation color ring back tone service | |
| JP2005033311A (en) | Voice speech recording method | |
| WO2013082927A1 (en) | Method for implementing ring back tone service in one number link you service and one number link you service server | |
| CN101854616A (en) | Media negotiation method in call forwarding and call forwarding application server | |
| US8094799B2 (en) | Enabling and disabling terminating features of a terminating switch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20171221 Address after: Tiefu iron rich street Pizhou city 221331 Jiangsu city of Xuzhou Province Patentee after: Huang Shaowei Address before: 510640 Guangdong City, Tianhe District Province, No. five, road, public education building, unit 371-1, unit 2401 Patentee before: GUANGDONG GAOHANG INTELLECTUAL PROPERTY OPERATION Co.,Ltd. Effective date of registration: 20171221 Address after: 510640 Guangdong City, Tianhe District Province, No. five, road, public education building, unit 371-1, unit 2401 Patentee after: GUANGDONG GAOHANG INTELLECTUAL PROPERTY OPERATION Co.,Ltd. Address before: 518057 Nanshan District high tech Industrial Park, Guangdong, South Road, science and technology, ZTE building, legal department Patentee before: ZTE Corp. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20181026 Address after: 510640 2414-2416 of the main building 371, five mountain road, Tianhe District, Guangzhou, Guangdong. Patentee after: GUANGDONG GAOHANG INTELLECTUAL PROPERTY OPERATION Co.,Ltd. Address before: 221331 Jiangsu province Xuzhou city Pizhou City Tie Fu town tie Fu Street Patentee before: Huang Shaowei |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20181213 Address after: 221351 Industrial Park, Zhuang Town, Pizhou City, Xuzhou, Jiangsu Patentee after: Xuzhou Tie Shou hardware tools Manufacturing Co.,Ltd. Address before: 510640 2414-2416 of the main building 371, five mountain road, Tianhe District, Guangzhou, Guangdong. Patentee before: GUANGDONG GAOHANG INTELLECTUAL PROPERTY OPERATION Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110525 Termination date: 20180402 |