CN101594598B - Method and system for media negotiation in IMS network - Google Patents
Method and system for media negotiation in IMS network Download PDFInfo
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Abstract
The invention discloses a method and a system for media negotiation in an IMS network. The method is to reset a new media interrelationship through adding an interface setting the media interrelationship between a service layer of an application server and a calling control processing layer according to media description information carried by a media update message, position of the media update message in a negotiation flow and other factors after the application server receives the media update message carrying the media description information. The system comprises a calling control processing module, a service module, a reporting interface and the interface setting the media interrelationship. By adopting the technical proposal, the application server can control the negotiation process of the media more flexibly, and overcome the defect of unsuccessful media negotiation when dialing service nesting is clicked in the prior art.
Description
Technical field
The present invention relates to communication technical field, relate in particular to the method and system of media negotiation in a kind of IMS (Internet Protocol MultimediaSubsystem, IP Multimedia System) network.
Background technology
In the Click To Dial of IMS core net; Because Click To Dial has that intelligence is answered, intelligent route and the several service features of state route; These several service features can be with Call Forwarding; It is repeatedly nested that this service feature may cause business in practical application, to take place, and the operation flow complexity increases.Because the IMS core net is supported calling and called both sides' UE (User Equipment; Subscriber equipment) at SDP (SessionDescription Protocol; Media description information) provides and exchange prerequisite in the negotiations process of replying each other and carry out resource reservation Precondition; And the session negotiations process of medium early-session early, further increased the complexity of operation flow.
Demand according to business; Under a kind of applied scene; Based on the AS (Application Server, application server) of SIP (Session Initiation Protocol, Session initiation Protocol) between calling subscriber and called subscriber; Serve as the third party and Calling Side and callee side and carry out capability negotiation respectively, finally accomplish the bridging functionality of Calling Side and callee side then through SIP session negotiation session function.
Owing to lay the time and satisfy professional object difference, be deployed in the UA equipment of One's name is legion in the network, its SIP ability can not be accomplished identical.Therefore; For the UA that guarantees different abilities on the network can carry out basic session, the subscriber equipment of initiating SIP session side will be enumerated the own capability set of being supported before initiation session, under the specific transactions situation; Also may indicate and require the opposite end must support a certain capability set; At this moment, if this capability set is not supported in the opposite end, this session will be failed.After call request arrives callee side, callee side will be taken all factors into consideration following factor: the audio frequency and video disposal ability of local terminal UA, the audio frequency and video disposal ability of opposite end UA, and business demand etc., if above-mentioned three is mated, this calling reaches Perfect Matchings; Otherwise session is carried out mutual with non-maximum capacity or even can not be mutual.Specifically, the session both sides can have following characteristic according to this session of negotiation ability decision:
1. whether start Temporary Response message and reliably transmit, for example 180 message that characterize the ring behavior are reliably transmitted;
2. whether start resource reservation, the purpose that starts resource reservation is in order to accomplish the policy control to media resource better;
3. whether set up medium early, early medium are used for callee side provides ring-back tone or other sound resources.
In practical application, various sip messages and their effect that session ability is mainly used in consulting are following: invite message is to call out the message of initiating; 183 message, 180 message and prack message all belong to the response of intermediateness, and 183 message are the Temporary Responses to invite message, represent that called agreement sets up session, and 183 message are carried called medium and caller is consulted.Update message is the medium updating message, is used under two kinds of situation, and a kind of is when the medium that consulted the front are consulted again, and another kind is that the medium that consult through 183 message the front are when also consulting completion and need reaffirm medium.Sip message is a carrier in fact, and final purpose all is in order to let the calling and called media negotiation accomplish, and lets the calling and called can normal talking.
AS is in the process of treatment S IP call signaling at present; Only when receiving the message of INVITE, 183,200 these several SDP of carrying of off-hook; Could to the session of both call sides early medium early-session and conversation media session incidence relation is set, and when receiving that other message of carrying SDP for example is used for the update message of new media more, can only concern according to the medium that the front has been provided with and carry out media negotiation; In the complicated nested flow process that Call Forwarding even repeatedly Call Forwarding occur, will appear at like this set up a medium incidence relation after; SDP that the update message that AS receives is carried and front are provided with the medium incidence relation and are not inconsistent, and cause media negotiation not pass through, so before called off-hook; Caller can't learn owing to can't hear called CRBT or ring-back tone whether phone is put through; And after called off-hook, calling and called are owing to the media negotiation that can't carry out success once more to conversation media session, and the calling and called both sides also can't normal talking.
Summary of the invention
The technical problem that the present invention will solve is, the method and system of media negotiation in a kind of IMS network is provided, and overcomes the unsuccessful defective of media negotiation when Click To Dial is nested in the prior art.
The technical scheme that the present invention adopts is; The method of media negotiation in the said IMS network; The calling subscriber initiates the call request to called subscriber equipment; Calling subscriber equipment and called subscriber equipment, increase between the operation layer of application server and call control process layer and report interface and medium incidence relation interface is set negotiating media through the session initiation protocol call signaling;
After the call control process layer is received the medium updating message; Report interface to give operation layer through this with this information reporting; It is that Calling Side and callee side are removed original medium incidence relation that operation layer is provided with medium incidence relation interface through this, sets up new medium incidence relation;
Operation layer sends to the call control process layer with this new medium incidence relation, and the call control process layer sends this new medium incidence relation group bag.
The mode of the medium incidence relation that said foundation is new comprises:
When operation layer is for the first time received the medium updating message of carrying conversation media session after the called subscriber equipment ring, for Calling Side conversation media session and callee side conversation media session set up incidence relation;
Receive for the first time after the called subscriber equipment ring when operation layer and to carry session early during the medium updating message of medium early-session and conversation media session, for session medium early-session morning of Calling Side conversation media session and callee side sets up incidence relation.
Said medium comprise conversation media and/or medium early.
The present invention also provides the system of media negotiation in a kind of IMS network, comprises subscriber equipment, IMS core net and application server, and said application server comprises:
The call control process module is used for the medium updating message is reported business module through reporting interface, and the new medium incidence relation group bag that business module issues is sent;
Business module, being used for through medium incidence relation interface is set is that Calling Side and callee side are removed original medium incidence relation, sets up new medium incidence relation;
Report interface, be used to provide the passage that reports the medium updating message from the call control process module to business module;
Medium incidence relation interface is set, is used to Calling Side and callee side and removes original medium incidence relation, set up new medium incidence relation.
The said medium incidence relation interface that is provided with is set up the mode of new medium incidence relation and is comprised:
When operation layer is for the first time received the medium updating message of carrying conversation media session after the called subscriber equipment ring, for Calling Side conversation media session and callee side conversation media session set up incidence relation;
Receive for the first time after the called subscriber equipment ring when operation layer and to carry session early during the medium updating message of medium early-session and conversation media session, for session medium early-session morning of Calling Side conversation media session and callee side sets up incidence relation.
The present invention also provides the system of media negotiation in a kind of IMS network, comprises subscriber equipment, IMS core net and application server, and said application server comprises:
The call control process module is used for the medium updating message is reported business module through the interface that the medium incidence relation is set, and the new medium incidence relation group bag that business module issues is sent;
Business module, being used for through medium incidence relation interface is set is that Calling Side and callee side are removed original medium incidence relation, sets up new medium incidence relation;
Medium incidence relation interface is set, is used to provide from the call control process module report the passage of medium updating message, and removes original medium incidence relation, set up new medium incidence relation for Calling Side and callee side to business module.
The said medium incidence relation interface that is provided with is set up the mode of new medium incidence relation and is comprised:
When operation layer is for the first time received the medium updating message of carrying conversation media session after the called subscriber equipment ring, for Calling Side conversation media session and callee side conversation media session set up incidence relation;
Receive for the first time after the called subscriber equipment ring when operation layer and to carry session early during the medium updating message of medium early-session and conversation media session, for session medium early-session morning of Calling Side conversation media session and callee side sets up incidence relation.
Adopt technique scheme, the present invention has advantage at least:
The method and system of media negotiation in the IMS network according to the invention; Through between the operation layer of application server and call control process layer, increasing the interface that the medium incidence relation is set; After using clothes and being equipped with device and receiving the medium updating message that has media description information, media description information that can carry according to the medium updating message and medium updating message factor such as residing position in consulting flow process is reset new medium incidence relation.Application server just can be controlled the negotiations process of medium more flexibly like this, overcomes the unsuccessful defective of media negotiation when Click To Dial is nested in the prior art.
Description of drawings
Fig. 1 is the method flow diagram of media negotiation in the said IMS network of first embodiment of the invention;
Fig. 2 is an application server structural representation in the system of media negotiation in the said IMS network of second embodiment of the invention;
Fig. 3 is an application server structural representation in the system of media negotiation in the said IMS network of third embodiment of the invention;
Fig. 4 for fourth embodiment of the invention the present invention is applied to change before the call in the time flow chart;
Fig. 5 for fifth embodiment of the invention the present invention is applied to change before the call in the time flow chart.
Embodiment
Reach technological means and the effect that predetermined purpose is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, the method and system of media negotiation in the said IMS network that the present invention is proposed, specify as after.
First embodiment of the invention, the method for media negotiation in a kind of IMS network increases between the operation layer of application server and call control process layer and reports interface and medium incidence relation interface is set, and is as shown in Figure 1, comprising:
Step 1, calling subscriber initiate the call request to called subscriber equipment, and calling subscriber equipment and called subscriber equipment pass through the session initiation protocol call signaling to negotiating media;
After the call control process layer of step 2, application server is received the medium updating message, this information reporting is given the operation layer of application server through reporting interface;
The operation layer of step 3, application server is that Calling Side and callee side are removed original medium incidence relation through medium incidence relation interface is set, and sets up new medium incidence relation;
The mode of the medium incidence relation that said foundation is new is: media description information that carries according to the medium updating message and medium updating message be factor such as residing position in consulting flow process, resets new medium incidence relation, and be concrete, comprises following situation:
When operation layer is for the first time received the medium updating message of carrying conversation media session after the called subscriber equipment ring, for Calling Side conversation media session and callee side conversation media session set up incidence relation;
Receive for the first time after the called subscriber equipment ring when operation layer and to carry session early during the medium updating message of medium early-session and conversation media session, for session medium early-session morning of Calling Side conversation media session and callee side sets up incidence relation;
When operation layer before the called subscriber equipment ring, receive carry the medium updating message of SDP the time, only return response to called, do not set up the medium incidence relation and forward medium to Calling Side.
Step 4, operation layer send to the call control process layer with this new medium incidence relation, and the call control process layer sends new medium incidence relation group bag.
Second embodiment of the invention, the system of media negotiation comprises subscriber equipment, IMS core net and application server in a kind of IMS network, wherein, application server is as shown in Figure 2, comprising:
The call control process module is used for the medium updating message is reported business module through reporting interface, and the new medium incidence relation group bag that business module issues is sent;
Business module, being used for through medium incidence relation interface is set is that Calling Side and callee side are removed original medium incidence relation, sets up new medium incidence relation;
Report interface, be used to provide the passage that reports the medium updating message from the call control process module to business module;
Medium incidence relation interface is set, is used to Calling Side and callee side and removes original medium incidence relation, set up new medium incidence relation.
The said medium incidence relation interface that is provided with is set up the mode of new medium incidence relation and is comprised:
When operation layer is for the first time received the medium updating message of carrying conversation media session after the called subscriber equipment ring, for Calling Side conversation media session and callee side conversation media session set up incidence relation;
Receive for the first time after the called subscriber equipment ring when operation layer and to carry session early during the medium updating message of medium early-session and conversation media session, for session medium early-session morning of Calling Side conversation media session and callee side sets up incidence relation.
When operation layer before the called subscriber equipment ring, receive carry the medium updating message of SDP the time, only return response to called, do not set up the medium incidence relation and forward medium to Calling Side.
Third embodiment of the invention, the system of media negotiation comprises subscriber equipment, IMS core net and application server in a kind of IMS network, wherein, application server is as shown in Figure 3, comprising:
The call control process module is used for the medium updating message is reported business module through the interface that the medium incidence relation is set, and the new medium incidence relation group bag that business module issues is sent;
Business module, being used for through medium incidence relation interface is set is that Calling Side and callee side are removed original medium incidence relation, sets up new medium incidence relation;
Medium incidence relation interface is set, is used to provide from the call control process module report the passage of medium updating message, and removes original medium incidence relation, set up new medium incidence relation for Calling Side and callee side to business module.The difference of the present embodiment and second embodiment just is; Logically, will report interface and medium incidence relation interface will be set to unite two into one, and promptly adopt a reusable interface to realize above-mentioned two kinds of functions; The implementation of interface duplex is this area technological means commonly used, so locate not detail.
The said medium incidence relation interface that is provided with is set up the mode of new medium incidence relation and is comprised:
When operation layer is for the first time received the medium updating message of carrying conversation media session after the called subscriber equipment ring, for Calling Side conversation media session and callee side conversation media session set up incidence relation;
Receive for the first time after the called subscriber equipment ring when operation layer and to carry session early during the medium updating message of medium early-session and conversation media session, for session medium early-session morning of Calling Side conversation media session and callee side sets up incidence relation.
When operation layer before the called subscriber equipment ring, receive carry the medium updating message of SDP the time, only return response to called, do not set up the medium incidence relation and forward medium to Calling Side.
Fourth embodiment of the invention; Be example with the flow process that takes place to change before the call below; Explain that the method and system that adopts media negotiation in the IMS network according to the invention makes the medium body consult successful process, the calling subscriber initiates the calling to the first called subscriber equipment UE C, and the first called subscriber UE C has been arranged to its Call Forwarding of receiving to the second called subscriber equipment UE D; As shown in Figure 4, concrete media negotiation step is following:
Step 1, caller AS bind false medium and the calling subscriber equipment UE A negotiation of calling subscriber equipment UE A through its structure;
Step 2, caller AS call out the first called subscriber equipment UE C; The first called subscriber equipment UE C returns 183 message and the Calling Side conversation media session that carry session medium early-session morning and conversation media session through the IMS core net and carries out the negotiation of ring-back tone receiving ability, therefore the conversation media session of Calling Side and session medium early-session morning of callee side is set up incidence relation;
Step 3, the first called subscriber equipment UE C return the update message and the Calling Side conversation media session that carry conversation media session through the IMS core net and carry out the negotiation of delivery value; In the prior art because the SDP that carries of update message and front are provided with the medium incidence relation is not inconsistent; Therefore caller AS only returns association is not set up in the response of update message; But this step does not exert an influence to follow-up media consultation process, because the first called subscriber equipment UE C is not the subscriber equipment that the calling subscriber finally will call out.But according to technical scheme of the present invention; After the call control process layer of caller AS is received update message; This information reporting is given the operation layer of caller AS through reporting interface; Media description information that the operation layer of caller AS carries according to the medium updating message and medium updating message be factor such as residing position in consulting flow process, resets new medium incidence relation, and be concrete; Owing to be the medium updating message of carrying SDP that caller AS operation layer is received before the first called subscriber equipment UE C ring at this moment; Only return response, do not set up the medium incidence relation of Calling Side and callee side, therefore do not forward callee side conversation media session to Calling Side to callee side.
Step 4, the first called subscriber equipment UE C send i.e. 180 message of ALERTING message;
Step 5, called AS call out the second called subscriber equipment UE D; The turn of tidal stream journey begins before this moment of the expression for the first time; The second called subscriber equipment UE D returns through the IMS core net and carries session early medium early-session and 183 message of conversation media session and the media negotiation that Calling Side conversation media session carries out the ring-back tone receiving ability; That provide Calling Side conversation media session this moment is called AS, because called AS is a Calling Side with respect to the second user equipment (UE) D.Because application server is in the process of treatment S IP call signaling; When receiving 183 message; Can incidence relation be set to session medium early-session morning and the conversation media session of both call sides, the conversation media session of Calling Side and session medium early-session morning of callee side be set up incidence relation here.
Step 6, called AS are to caller AS sends the update message of carrying conversation media session and Calling Side carries out the ring-back tone receiving ability media negotiation; According to the processing method of prior art is the incidence relation of session medium early-session morning of the Calling Side conversation media session that sets up according to the step 2 kind and callee side; Because SDP that the update message that caller AS receives is carried and front are provided with the medium incidence relation and are not inconsistent, and cause media negotiation not pass through.
But according to technical scheme of the present invention; After the call control process layer of caller AS is received update message; This information reporting is given the operation layer of caller AS through reporting interface; Media description information that the operation layer of caller AS carries according to the medium updating message and medium updating message be factor such as residing position in consulting flow process; Reset new medium incidence relation, concrete, owing to the operation layer that is caller AS is at this moment received for the first time the update message of carrying conversation media session after the first called subscriber equipment UE C ring; Caller AS sets up incidence relation for Calling Side conversation media session and callee side conversation media session; Forward conversation media session the first user equipment (UE) A of Calling Side to through invite message, the first user equipment (UE) A carries the conversation media session that describes local terminal ring-back tone receiving ability to called returning, the media negotiation success.
Fifth embodiment of the invention; Be example with the flow process that takes place to change before the call below, explain that the method and system that adopts media negotiation in the IMS network according to the invention makes the medium body consult successful process, the calling subscriber initiates the calling to the first called subscriber equipment UE C; The first called subscriber UE C has been arranged to its Call Forwarding of receiving to the second called subscriber equipment UE D; As shown in Figure 5, concrete media negotiation step and the 4th embodiment are roughly the same, and difference is:
Step 5, called AS call out the second called subscriber equipment UE D; The turn of tidal stream journey begins before this moment of the expression for the first time; The second called subscriber equipment UE D returns through the IMS core net and carries session early medium early-session and 183 message of conversation media session and the media negotiation that Calling Side conversation media session carries out the ring-back tone receiving ability; That provide Calling Side conversation media session this moment is called AS, because called AS is a Calling Side with respect to the second user equipment (UE) D.Because application server is in the process of treatment S IP call signaling; When receiving 183 message; Can incidence relation be set to session medium early-session morning and the conversation media session of both call sides, direct here session medium early-session morning and the conversation media session with callee side is transparent to Calling Side;
Step 6, called AS send the update message and the Calling Side that carry session medium early-session morning and conversation media session to caller AS and carry out media negotiation; According to technical scheme of the present invention; After the call control process layer of caller AS is received update message; This information reporting is given the operation layer of caller AS through reporting interface; Media description information that the operation layer of caller AS carries according to update message and medium updating message be factor such as residing position in consulting flow process; Reset new medium incidence relation, concrete, when after the called subscriber equipment ring, receiving the update message of carrying session medium early-session morning and conversation media session for the first time owing to the operation layer that is caller AS at this moment; Caller AS's is that Calling Side conversation media session and callee side session medium early-session morning set up incidence relation; Through invite message session early medium early-session forward the first user equipment (UE) A of Calling Side to, the first user equipment (UE) A carries the conversation media session that describes local terminal ring-back tone receiving ability to called returning, the media negotiation success.
The method and system of media negotiation in the IMS network according to the invention; Through between the operation layer of application server and call control process layer, increasing the interface that the medium incidence relation is set; After receiving the medium updating message that has media description information when application server, media description information that can carry according to the medium updating message and medium updating message factor such as residing position in consulting flow process is reset new medium incidence relation.Application server just can be controlled the negotiations process of medium more flexibly like this, overcomes the unsuccessful defective of media negotiation when Click To Dial is nested in the prior art.
Through the explanation of embodiment, should be to reach technological means and the effect that predetermined purpose takes to be able to more deeply and concrete understanding to the present invention, yet appended diagram only provide the usefulness of reference and explanation, is not to be used for the present invention is limited.
Claims (7)
1. the method for media negotiation in the IMS network; The calling subscriber initiates the call request to called subscriber equipment; Calling subscriber equipment and called subscriber equipment, is characterized in that between the operation layer of application server and call control process layer, increasing and report interface and medium incidence relation interface is set negotiating media through the session initiation protocol call signaling;
After the call control process layer is received the medium updating message; Give operation layer through the said interface that reports with this information reporting; Operation layer is that Calling Side and callee side are removed original medium incidence relation through the said interface that the medium incidence relation is set; When operation layer is received the medium updating message of carrying media description information for the first time after the called subscriber equipment ring, be that Calling Side and callee side are set up new medium incidence relation through the said interface that the medium incidence relation is set;
Operation layer sends to the call control process layer with said new medium incidence relation, and the call control process layer sends said new medium incidence relation group bag.
2. according to the method for media negotiation in the said IMS network of claim 1, it is characterized in that the mode of the medium incidence relation that said foundation is new comprises:
When operation layer is for the first time received the medium updating message of carrying conversation media session after the called subscriber equipment ring, for Calling Side conversation media session and callee side conversation media session set up incidence relation;
Receive for the first time after the called subscriber equipment ring when operation layer and to carry session early during the medium updating message of medium early-session and conversation media session, for session medium early-session morning of Calling Side conversation media session and callee side sets up incidence relation.
3. according to the method for media negotiation in the said IMS network of claim 2, it is characterized in that said medium comprise conversation media and/or medium early.
4. the system of media negotiation in the IMS network comprises subscriber equipment, IMS core net and application server, it is characterized in that said application server comprises:
The call control process module is used for the medium updating message is reported business module through reporting interface, and the new medium incidence relation group bag that business module issues is sent;
Business module; Being used for through medium incidence relation interface is set is that Calling Side and callee side are removed original medium incidence relation; When after the called subscriber equipment ring, receiving the medium updating message of carrying media description information for the first time, be that Calling Side and callee side are set up new medium incidence relation through medium incidence relation interface is set;
Report interface, be used to provide the passage that reports the medium updating message from the call control process module to business module;
Medium incidence relation interface is set, is used to Calling Side and callee side and removes original medium incidence relation, set up new medium incidence relation.
5. according to the system of media negotiation in the said IMS network of claim 4, it is characterized in that the said medium incidence relation interface that is provided with sets up the mode of new medium incidence relation and comprise:
When business module is for the first time received the medium updating message of carrying conversation media session after the called subscriber equipment ring, for Calling Side conversation media session and callee side conversation media session set up incidence relation;
Receive for the first time after the called subscriber equipment ring when business module and to carry session early during the medium updating message of medium early-session and conversation media session, for session medium early-session morning of Calling Side conversation media session and callee side sets up incidence relation.
6. the system of media negotiation in the IMS network comprises subscriber equipment, IMS core net and application server, it is characterized in that said application server comprises:
The call control process module is used for the medium updating message is reported business module through the interface that the medium incidence relation is set, and the new medium incidence relation group bag that business module issues is sent;
Business module; Being used for through medium incidence relation interface is set is that Calling Side and callee side are removed original medium incidence relation; When after the called subscriber equipment ring, receiving the medium updating message of carrying media description information for the first time, be the new medium incidence relation of Calling Side and called foundation through medium incidence relation interface is set;
Medium incidence relation interface is set, is used to provide from the call control process module report the passage of medium updating message, and removes original medium incidence relation, set up new medium incidence relation for Calling Side and callee side to business module.
7. according to the system of media negotiation in the said IMS network of claim 6, it is characterized in that the said medium incidence relation interface that is provided with sets up the mode of new medium incidence relation and comprise:
When business module is for the first time received the medium updating message of carrying conversation media session after the called subscriber equipment ring, for Calling Side conversation media session and callee side conversation media session set up incidence relation;
Receive for the first time after the called subscriber equipment ring when business module and to carry session early during the medium updating message of medium early-session and conversation media session, for session medium early-session morning of Calling Side conversation media session and callee side sets up incidence relation.
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| CN2009101481065A CN101594598B (en) | 2009-06-22 | 2009-06-22 | Method and system for media negotiation in IMS network |
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| CN2009101481065A CN101594598B (en) | 2009-06-22 | 2009-06-22 | Method and system for media negotiation in IMS network |
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| CN105262744B (en) * | 2015-10-10 | 2018-06-01 | 北京佳讯飞鸿电气股份有限公司 | A kind of method that media port multiplexing is realized in multimedia dispatching system |
| CN107371191B (en) * | 2016-05-11 | 2019-11-12 | 中国移动通信有限公司研究院 | Method and device for converting an audio call into a video call |
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