CN102523222A - Processing method for videophone call receding and processing system for same - Google Patents
Processing method for videophone call receding and processing system for same Download PDFInfo
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- CN102523222A CN102523222A CN2011104307250A CN201110430725A CN102523222A CN 102523222 A CN102523222 A CN 102523222A CN 2011104307250 A CN2011104307250 A CN 2011104307250A CN 201110430725 A CN201110430725 A CN 201110430725A CN 102523222 A CN102523222 A CN 102523222A
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Abstract
The invention provides a processing method for videophone call receding and a processing system for the same. The method includes the steps of after a called terminal of a CS (circuit switched) domain receives a video call request initiated by a calling terminal of an IMS (IP multimedia subsystem) domain and selects audio answering, sending release information to a VIG (video interworking gateway), wherein the release information carries reason codes to indicate that the called terminal selects audio answering; sending error messages to an AS (application server) on the side of the IMS after the VIG receives the release information; and initiating audio media negotiation and resetting up audio call after the AS on the side of the IMS receives the error messages. The processing method can avoid the charging problem due to videophone call receding.
Description
Technical field
The present invention relates to the mobile communication technology field, relate in particular to processing method and system that a kind of video telephone falls after rise.
Background technology
In the prior art, (IP Multimedia Subsystem, (Circuit Switched, CS) territory can intercommunication in IMS) territory and circuit switching for IP Multimedia System.IMS territory user can video call CS territory user, and after CS territory user selected video to answer, both can carry out video call business.If CS territory user does not select video to answer and after selecting audio frequency to answer, can initiate the secondary media negotiation to audio frequency again by IMS territory user in the agreement at present.For the terminal of not supporting to upgrade (update); When being directed against the media negotiation of audio frequency; (Application Server AS) returns 200OK message to calling terminal, so that calling terminal is initiated the media negotiation of audio frequency again after receiving 200OK message to need the Calling Side application server.But; Because AS is network equipment, AS to the terminal when sending 200OK message, this 200OK message can be sent to the charging network element of network side simultaneously; CSCF (Call Session Control Function for example; CSCF), and charging network element can charge after receiving 200OK message, so can cause the charging problem after sending 200OK message in the prior art.
Summary of the invention
Processing method and system that the present invention provides a kind of video telephone to fall after rise; After CS territory user does not answer IMS territory Client-initiated video traffic; Calling Side AS can directly initiate audio call; The direct listening to audio CRBT of IMS user avoids not supporting the terminal of Update to carry out the charging problem that the secondary negotiation causes for the listening to audio CRBT.
The invention provides the processing method that a kind of video telephone falls after rise, comprising:
CS territory terminal called is receiving the video call request that IMS territory calling terminal is initiated, and after selecting audio frequency to answer, sends release message to VIG, carries cause value in the said release message, answers to show called selection audio frequency;
After VIG receives said release message, send error message to the AS of IMS side;
After the AS of IMS side receives error message, initiate audio frequency media and consult, rebulid audio call.
The invention provides the treatment system that a kind of video telephone falls after rise, comprising:
VIG; Be used to receive the release message that the terminal called in CS territory sends; And confirm that according to said release message called selection audio frequency answers the back and send error message, said release message is that said terminal called is receiving the video call request that IMS territory calling terminal is initiated, and selects audio frequency to answer that the back sends; Carry cause value in the said release message, answer to show called selection audio frequency;
AS is positioned at the IMS territory, is used to receive the said error message that said VIG sends, and after receiving said error message, initiates audio frequency media and consult, and rebulids audio call.
Can know by technique scheme; After called selection audio frequency is answered in the embodiment of the invention; Send release message to VIG; VIG sends error message to the AS in IMS territory afterwards, makes the AS in IMS territory receive to initiate audio frequency media again behind the error message to consult, rather than is consulted by the audio frequency that calling terminal is initiated; Just do not need the calling terminal of AS to the IMS territory in IMS territory to send 200OK message yet, just can not avoid calling terminal in the prior art to consult the charging problem that causes yet for the listening to audio CRBT carries out secondary owing to send 200Ok message.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention; The accompanying drawing of required use is done an introduction simply in will describing embodiment below; Obviously, the accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the method flow sketch map of first embodiment of the invention;
Fig. 2 is the sketch map of IMS territory and the intercommunication of CS territory in the embodiment of the invention;
Fig. 3 is the method flow sketch map of second embodiment of the invention;
Fig. 4 is that video media is consulted schematic flow sheet in the embodiment of the invention;
Fig. 5 is an embodiment of the invention sound intermediate frequency media negotiating process sketch map;
Fig. 6 is the system configuration sketch map of third embodiment of the invention;
Fig. 7 is the system configuration sketch map of fourth embodiment of the invention.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer; To combine the accompanying drawing in the embodiment of the invention below; Technical scheme in the embodiment of the invention is carried out clear, intactly description; Obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Fig. 1 is the method flow sketch map of first embodiment of the invention, comprising:
Step 11:CS territory terminal called is receiving the video call request that IMS territory calling terminal is initiated, and after selecting audio session, sends release message to VIG, carries cause value in the said release message, answers to show called selection audio frequency;
After step 12:VIG receives said release message, send error message to the AS of IMS side;
Wherein, above-mentioned release message and error message can adopt existing techniques in realizing, and the cause value in the release message can be carried at the reason field of release message, and the occurrence of this cause value can define as required in advance.
After the AS of step 13:IMS side receives error message, initiate audio frequency media and consult, rebulid audio call.
Wherein, called after selecting audio frequency to answer in the present embodiment, send error message to the AS of IMS side, the AS of IMS side can initiate the voice call request to audio frequency again according to this error message.Since not that calling terminal carries out the secondary agreement request for the listening to audio CRBT, therefore, the charging problem that causes in the time of can avoiding the audio frequency secondary to consult.
After called selection audio frequency is answered in the present embodiment; Send release message to VIG; VIG sends error message to the AS in IMS territory afterwards; Make the AS in IMS territory receive to initiate audio frequency media again behind the error message and consult; Rather than consult by the audio frequency that calling terminal is initiated, just do not need the calling terminal of AS to the IMS territory in IMS territory to send 200OK message yet, just can not avoid calling terminal in the prior art to consult the charging problem that causes owing to send 200Ok message for the listening to audio CRBT carries out secondary yet.
Fig. 2 is the sketch map of IMS territory and the intercommunication of CS territory in the embodiment of the invention; Referring to Fig. 2; Comprise MGCF (Media Gateway Control Function; MGCF), the IP multimedia gateway (IP Multimedia Media Gateway, IM-MGW), gateway (Serving Gateway, SGW), CSCF (Call Session Control Function; CSCF) and Breakout Gateway Control Function (Breakout Gateway Control Function, BGCF).Line between each network element is that solid line shows it is user plane, for dotted line is indicated as chain of command.
Wherein, MGCF is used to accomplish protocol conversion function; Comprise session set up agreement (Session Initiation Protocol, SIP) and ISUP (Integrated Service Digital Network User Part, the ISUP) conversion between the agreement; Just be used for IMS network and public switch telephone network (Public Switched Telephone Network, PSTN), between the 2G network; Also be used for Session Initiation Protocol and with the call control protocol of bearer independent (Bearer Independent Call Control protocol, the conversion between BICC) just is used between IMS network and the 3G circuit domain; Also should support the intercommunication between the relevant No.7 signaling message of Session Initiation Protocol and inverter circuit simultaneously, and through the intercommunication between SGW realization and the CS territory.MGCF has realized the intercommunication at control plane (Control Plane) of IMS territory and CS territory through protocol conversion function.
MGCF also is used for WMG is controlled, and like distributing, modificating and release of related resource on the control WMG, and the control WMG is carried out relevant encoding and decoding conversion etc.H.248, MGCF is to control the realizing through Mn of WMG.
MGCF also is used for carrying out alternately with serving session control equipment (S-CSCF) and the inquiry session control appliance (I-CSCF) among the CSCF of CSCF, when the call request of receiving from PSTN network, 3G/2G circuit domain, request message is routed to relevant device.
The IM-MGW WMG is between IMS core net and CS territory; Accomplish the intercommunication between user plane (UserPlane); So that realize the intercommunication of bearing bed between these networks, the control of WMG receiving media gateway control apparatus mainly provides correlation functions such as encoding and decoding conversion.
SGW between IMS core net and traditional No.7 signaling network, be responsible for to the No.7 signaling message transfer, translation or finalization process, main realize adaptive to the bottom of No.7 signaling message so that between IP network and No.7 signaling network, transmit the No.7 signaling message.SGW can independently be provided with also can close with MGCF or IM-MGW and establish.
BGCF is the entity with routing function, accomplishes the Route Selection when IMS calls out to the CS territory, and the decision call signaling to which network (next BGCF) or which interworking unit (MGCF) transmits.
Above-mentioned BGCF, CSCF belong to the entity in IMS territory, and in addition, the IMS territory also comprises the AS in IMS territory.For the CS territory; Specifically can comprise GMSC (Gateway Mobile Switching Center; GMSC), attaching position register (Home Location Register, HLR), color ring platform and Mobile Switching Center Server (MSC Server).
Fig. 3 is the method flow sketch map of second embodiment of the invention, comprising:
The calling terminal in step 301:IMS territory is initiated the media negotiation of video call.
The media negotiating process of video call can comprise referring to Fig. 4:
The calling terminal in step 401:IMS territory sends request (Invite) message to the AS in IMS territory, comprises SDP type field in the Invite message, and for video call, SDP type wherein is indicated as video call.
The AS in step 402:IMS territory transmits this invite message to S-CSCF.
Step 403:S-CSCF confirms as video call according to the SDP type in this Invite message, and then (Video Interworking Gateway VIG) transmits Invite message to Video Interworking Gateway.
Step 404:VIG to GMSC send initial address message (Initial Address Message, IAM).Wherein, can carry the SS-code field among this IAM, and the SS-code field is indicated as video call.
Step 405:GMSC calls out according to the acquiescence flow processing; For example; User profile to HLR inquiry called subscriber comprises the CRBT identity code in the Query Result that wherein HLR returns, after returning the CRBT identity code; GMSC can be known called subscriber's Ring Back Tone service of having contracted, and can indicate color ring platform to send CRBT afterwards.
Step 406:GMSC is according to Query Result; Handle according to the cross-over connection scheme; That is, comprise the CRBT identity code in the Query Result after, GMSC can carry out the cross-over connection scheme with color ring platform to be handled; For example IAM is routed to the color ring platform in CS territory, and IAM is issued to the MSCServer of end office (EO) in CS territory by color ring platform;
Step 407:MSC Server paging is to the terminal called in CS territory; Terminal called is to MSC Server return address full message (Address Complete Message; ACM), this ACM message also can be called ALERTING message, and MSC Server transmits ACM to color ring platform; And transmit ACM to GMSC, and transmit ACM to VIG by GMSC by color ring platform; In addition, color ring platform can also be confirmed type of call according to the SS-code field among the IAM, and in the present embodiment, the type of call of this moment is indicated as video call.
Step 408:VIG changes into 183 message after receiving ACM message; And 183 message are sent to the calling terminal in IMS territory via S-CSCF and AS; And hold consultation with calling terminal, H.245 VIG and color ring platform are consulted simultaneously, begin telecasting video frequency color ring after consulting successfully.
Whether the terminal called in step 302:CS territory selects video to answer, if, execution in step 303, otherwise execution in step 304.
Step 303: called off-hook, conversation is set up successfully.
Step 304: terminal called send to discharge to VIG that (release, rel) message, and carry cause value so that after VIG receives this rel message, confirm that the called audio frequency of having selected answers.
Wherein, can be provided with in the terminal called, for example be arranged to only to carry out audio frequency and answer, paging is behind terminal called so, and terminal called can automatically reply rel message before user's off-hook.
After step 305:VIG receives the rel message of carrying above-mentioned cause value, send error message (500Server internal error) to the AS of IMS side.
The AS of step 306:IMS side initiates audio frequency media and consults.
In the prior art; If terminal called selects audio frequency to answer; And when calling terminal is not supported Update and is needed the secondary media negotiation; The AS in IMS territory also can send 200OK message to calling terminal, and calling terminal resends Reinvite message to the AS in IMS territory more afterwards, initiates the media negotiation to audio frequency again.But 200OK message can cause the charging problem.And in the present embodiment, do not need calling terminal to initiate again to consult, but initiate again to consult by AS, just do not need AS to send 200OK message to calling terminal yet.
The audio frequency media negotiations process can be as shown in Figure 5, referring to Fig. 5, comprising:
After the AS of step 501:IMS side receives error message, send invite message to S-CSCF, the SDP type that wherein carries is indicated as audio call.
After step 502:S-CSCF receives Invite message, be audio frequency, send Invite message to MGCF according to the SDP type that carries;
Step 503:MGCF is that IAM sends to GMSC with the Invite message conversion, and GMSC for example, routes to CS territory color ring platform with IAM, and by color ring platform IAM message is issued to the MSC Server of end office (EO) according to the acquiescence flow processing; Wherein, can carry the SS-code field among this IAM, and the SS-code field is indicated as audio call.
Step 504:MSC Server paging is to the called subscriber; The called subscriber returns ACM message; MSCServer sends ACM message to color ring platform; Color ring platform confirm to send the audio frequency CRBT according to the SS-code field among the IAM, and color ring platform transmits ACM to GMSC, and transmits ACM by GMSC to MGCF.
Step 505:MGCF converts 183 message to after receiving ACM, and before called off-hook was answered, color ring platform directly was a calling terminal audio plays CRBT, and does not need MGCF and calling terminal to consult for listening the audio frequency CRBT to carry out secondary;
Step 506: after calling terminal receives CRBT, RTP source (Real-time Transfer Protocol source, RTP source) do not checked.
Because calling terminal is a video when beginning request, and what receive at last is audio frequency, if carry out RTP source inspection, then calling terminal can find to have occurred mistake, so probably will dropped calls.For fear of dropped calls, calling terminal is not checked RTP source in the present embodiment.
Step 507: called off-hook, MGCF receive response message (Answer Message, ANM) 200OK message is sent to Calling Side S-CSCF in the back, S-CSCF issues 200OK message the AS in IMS territory;
The AS in step 508:IMS territory resends Invite message to MGCF and carries out the conversation media negotiation;
The AS in step 509:IMS territory receives the response message of MGCF, and carries the SDP that shows voice-frequency telephony and send Invite message to the calling subscriber and carry out media negotiation;
Step 510: the media negotiation success, media channel is set up, and calling and called begin voice call.
Can set up the media channel of Calling Side through step 508-509, because step 501-506 can set up the media channel of callee side, therefore, calling and called can be conversed, and certainly, are the conversation of carrying out audio frequency now, rather than video calling.
Fig. 6 is the system configuration sketch map of third embodiment of the invention, comprises VIG 61 and AS 62, and VIG is between IMS territory and CS territory, and AS is positioned at the IMS territory.VIG 61 is used to receive the release message that the terminal called in CS territory sends; And confirm that according to said release message called selection audio frequency answers the back and send error message; Said release message is that said terminal called is receiving the video call request that IMS territory calling terminal is initiated; And send after selecting audio frequency to answer, carry cause value in the said release message, answer to show called selection audio frequency; AS 62 is used to receive the said error message that said VIG sends, and after receiving said error message, initiates audio frequency media and consult, and rebulids audio call.
Optional, AS specifically is used for: after receiving error message, before called subscriber's off-hook, carry out audio frequency media with terminal called and consult, set up the audio frequency media passage of MGCF and terminal called; Behind called subscriber's off-hook, carry out audio frequency media with calling terminal and consult, set up the audio frequency media passage of MGCF and calling terminal.
Optional, referring to Fig. 7, present embodiment can also comprise S-CSCF 63, MGCF 64, GMSC65, MSC server 66 and color ring platform 67.At this moment, particularly, AS communicates by letter with VIG through S-CSCF.In addition, S-CSCF 63 is positioned at the IMS territory, is used to receive the request message that said AS sends, and described request message is that said AS sends after receiving error message, and described request message is indicated as audio call; MGCF 64 is used to receive the described request message that said S-CSCF transmits between CS territory and IMS territory, and is IAM with the described request message conversion, and said IAM is indicated as audio call; GMSC 65 is positioned at the CS territory, is used to receive the said IAM that said MGCF sends; MSC server 66 is positioned at the CS territory, is used to receive the said IAM that said MGCF sends through GMSC and color ring platform, and in paging behind the called subscriber, receive terminal called transmitting terminal ACM, and transmit said ACM to color ring platform; Color ring platform 67 is positioned at the CS territory; Be used to receive the said IAM of said GMSC forwarding and send to the MSC server; And receive the said ACM of MSC server forwards and send to MGCF, and after receiving ACM, send the audio frequency CRBT to calling terminal according to IAM via GMSC; Said MGCF 64 also is used for after receiving said ACM, not holding consultation with calling terminal, and said calling terminal is not checked the RTP source after receiving CRBT.
Optional, after said MGCF 64 also is used to receive called subscriber's off-hook, the ANM that terminal called sends, and send 200OK message; Said S-CSCF 63 also is used for giving AS with said 200OK forwards; Said AS 62 also is used for after receiving 200OK message, sending a request message to MGCF again, and the audio frequency media passage is set up in request; Said MGCF 64 also is used for returning the response message corresponding with described request message to said AS; Said AS 62 also is used for after receiving said response message, sending a request message to calling terminal, sets up the audio frequency media passage between calling terminal and MGCF.
After called selection audio frequency is answered in the present embodiment; Send release message to VIG; VIG sends error message to the AS in IMS territory afterwards; Make the AS in IMS territory receive to initiate audio frequency media again behind the error message and consult; Rather than consult by the audio frequency that calling terminal is initiated, just do not need the calling terminal of AS to the IMS territory in IMS territory to send 200OK message yet, just can not avoid calling terminal in the prior art to consult the charging problem that causes owing to send 200Ok message for the listening to audio CRBT carries out secondary yet.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be accomplished through the relevant hardware of program command; Aforesaid program can be stored in the computer read/write memory medium; This program the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
What should explain at last is: above embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although with reference to previous embodiment the present invention has been carried out detailed explanation, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these are revised or replacement, do not make the scope of the essence disengaging various embodiments of the present invention technical scheme of relevant art scheme.
Claims (8)
1. the processing method that video telephone falls after rise is characterized in that, comprising:
CS territory terminal called is receiving the video call request that IMS territory calling terminal is initiated, and after selecting audio frequency to answer, sends release message to VIG, carries cause value in the said release message, answers to show called selection audio frequency;
After VIG receives said release message, send error message to the AS of IMS side;
After the AS of IMS side receives error message, initiate audio frequency media and consult, rebulid audio call.
2. method according to claim 1 is characterized in that, after the AS of said IMS side receives error message, initiates audio frequency media and consults, and rebulids audio call, comprising:
After said AS receives error message, before called subscriber's off-hook, carry out audio frequency media with terminal called and consult, set up the audio frequency media passage of MGCF and terminal called;
Said AS carries out audio frequency media with calling terminal and consults behind called subscriber's off-hook, sets up the audio frequency media passage of MGCF and calling terminal.
3. method according to claim 2 is characterized in that, after said AS receives error message, before called subscriber's off-hook, carries out audio frequency media with terminal called and consults, and sets up the audio frequency media passage of MGCF and terminal called, comprising:
After said AS receives error message, send a request message to S-CSCF, described request message is indicated as audio call;
S-CSCF sends described request message to MGCF after receiving the said request message that is indicated as audio call;
MGCF is to send to GMSC behind the IAM with the described request message conversion, and sends to color ring platform and send to the MSC server by color ring platform via GMSC, and said IAM is indicated as audio call;
The paging of MSC server receives the ACM that terminal called sends behind the called subscriber, and said ACM is sent to MGCF via color ring platform and GMSC, and wherein, MGCF does not carry out media negotiation with calling terminal after receiving ACM;
After color ring platform receives ACM, confirm as behind the audio call according to IAM and to send the audio frequency CRBT to calling terminal, wherein, calling terminal is not checked the RTP source after receiving CRBT.
4. method according to claim 2 is characterized in that, said AS carries out audio frequency media with calling terminal and consults behind called subscriber's off-hook, sets up the audio frequency media passage of MGCF and calling terminal, comprising:
After MGCF receives called subscriber's off-hook, the ANM that terminal called sends, and send 200OK message to AS via S-CSCF;
AS sends a request message to MGCF after receiving 200OK message again, and the audio frequency media passage is set up in request;
AS sends a request message to calling terminal after receiving the response message of MGCF, sets up the audio frequency media passage between calling terminal and MGCF.
5. the treatment system that video telephone falls after rise is characterized in that, comprising:
VIG; Be used to receive the release message that the terminal called in CS territory sends; And confirm that according to said release message called selection audio frequency answers the back and send error message, said release message is that said terminal called is receiving the video call request that IMS territory calling terminal is initiated, and selects audio frequency to answer that the back sends; Carry cause value in the said release message, answer to show called selection audio frequency;
AS is positioned at the IMS territory, is used to receive the said error message that said VIG sends, and after receiving said error message, initiates audio frequency media and consult, and rebulids audio call.
6. system according to claim 5 is characterized in that, said AS specifically is used for:
After receiving error message, before called subscriber's off-hook, carry out audio frequency media with terminal called and consult, set up the audio frequency media passage of MGCF and terminal called;
Behind called subscriber's off-hook, carry out audio frequency media with calling terminal and consult, set up the audio frequency media passage of MGCF and calling terminal.
7. system according to claim 6 is characterized in that, also comprises:
S-CSCF is positioned at the IMS territory, is used to receive the request message that said AS sends, and described request message is that said AS sends after receiving error message, and described request message is indicated as audio call;
MGCF is used to receive the described request message that said S-CSCF transmits, and is IAM with the described request message conversion, and said IAM is indicated as audio call;
GMSC is positioned at the CS territory, is used to receive the said IAM that said MGCF sends;
The MSC server is positioned at the CS territory, is used to receive the said IAM that said MGCF sends through GMSC and color ring platform, and in paging behind the called subscriber, receive terminal called transmitting terminal ACM, and transmit said ACM to color ring platform;
Color ring platform; Be positioned at the CS territory; Be used to receive the said IAM of said GMSC forwarding and send to the MSC server, and receive the said ACM of MSC server forwards and send to MGCF, and after receiving ACM, send the audio frequency CRBT to calling terminal according to IAM via GMSC;
Said MGCF also is used for after receiving said ACM, not holding consultation with calling terminal, and said calling terminal is not checked the RTP source after receiving CRBT.
8. system according to claim 7 is characterized in that: after said MGCF also is used to receive called subscriber's off-hook, and the ANM that terminal called sends, and send 200OK message;
Said S-CSCF also is used for giving AS with said 200OK forwards;
Said AS also is used for after receiving 200OK message, sending a request message to MGCF again, and the audio frequency media passage is set up in request;
Said MGCF also is used for returning the response message corresponding with described request message to said AS;
Said AS also is used for after receiving said response message, sending a request message to calling terminal, sets up the audio frequency media passage between calling terminal and MGCF.
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