CN101448202B - Method for updating media with coloring ring back tone and ring tone services - Google Patents
Method for updating media with coloring ring back tone and ring tone services Download PDFInfo
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- CN101448202B CN101448202B CN2008100065937A CN200810006593A CN101448202B CN 101448202 B CN101448202 B CN 101448202B CN 2008100065937 A CN2008100065937 A CN 2008100065937A CN 200810006593 A CN200810006593 A CN 200810006593A CN 101448202 B CN101448202 B CN 101448202B
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Abstract
The invention discloses a method for updating media with coloring ring back tone and ring tone services. The method comprises the following steps: a coloring ring back tone/ring tone service device judges whether a response message comprises an end identification of the coloring ring back tone and ring tone services after receiving the response message of a session, if not, adds the end identification of the coloring ring back tone and ring tone services to the response message, transmits the response message, and initiates media re-negotiation between a calling user and a called user to update the media; otherwise, directly transmits the response message without the media re-negotiation between the calling user and the called user. The method solves the problem of the prior art that the coloring ring back tone/ring tone service devices of a calling network and a called network can simultaneously initiate a re-consultation request.
Description
Technical field
The present invention relates to the communications field, more specifically, relate to a kind of method of updating media with coloring ring back tone and ring tone services.
Background technology
IP (Internet Protocol, network interconnection agreement) IP multimedia subsystem, IMS (IP Multimedia CoreNetwork Subsystem, be called for short IMS) be by third generation partner program (3rd GenerationPartnership Project, abbreviation 3GPP) a kind of IP-based network framework that proposes, made up one opening and service environment flexibly, support multimedia application, can provide abundant multimedia service for the user.
In the IMS business system, key-course separates with operation layer, and key-course does not provide concrete business, and functions such as necessary triggering, route, charging only are provided to operation layer.Professional triggering and controlled function are CSCF (Call Session Control Function in the key-course, be called for short CSCF) finish, CSCF is divided into agency (Proxy-Call Session Control Function, abbreviation P-CSCF), inquiry (Interrogating) and service (Serving-Call Session Control Function, abbreviation S-CSCF) three type, that wherein take the main responsibility is S-CSCF, and the Interrogating type is optional.Operation layer is to be made up of a series of application servers (Application Server is called for short AS), and concrete business service can be provided.AS can be an independent entity, also may reside among the S-CSCF.Key-course (S-CSCF) calls the business on the AS according to user's professional triggering of CAMEL-Subscription-Information control, realizes business function.AS and S-CSCF can be referred to as service equipment (Server Equipment is called for short SE).End-to-end equipment in the session is called subscriber equipment (User Equipment, be called for short UE), is responsible for mutual with the user.These functional entitys use SIP (Session Initiation Protocol, session initiation protocol) agreement communication.In the business that needs play multimedia information, can need Multimedia Resource Function (Media Resource Function, abbreviation MRF) participation, MRF is also referred to as media server, be divided into control section MRFC and medium processing section MRFP, its control section is responsible for the translation of the SIP signaling of SE and is interpreted as instruction to MRFP, otherwise perhaps with the response translation of MRFP be interpreted as the SIP signaling that sends to SE, and processing section MRFP is responsible for the transmission and the reception of Media Stream.
Be a kind of business among the IMS simultaneously in the call establishment to the business of called play multimedia information, this business also can be described as color image service, permission is in calling procedure, play by the good multimedia messages of calling party's customization in advance to the callee, comprise audio frequency, video, figure and their combination etc., and after the callee replys, stop the multimedia messages broadcast.Be another kind of professional among the IMS simultaneously in the call establishment to the business of playing multimedia information for calling, this business also can be described as Ring Back Tone service, permission is in calling procedure, play by the good multimedia messages of the prior customization of callee to the calling party, and after the callee replys, stop the multimedia messages broadcast.
Fig. 1 is the basic messae flow process figure of existing Ring Back Tone service updating media after answering, it is called to have described calling, color ring server in calling procedure to the caller coloring ring back tone playing, after user answer, color ring server is initiated the situation of media re-negotiation, and its process is as follows:
Step 101, call subscriber terminal UE-A are to the service equipment request of making a call, carry the normal media resource information of UE-A, such as sending INVITE (invitation) message, in message body, carry the normal media resource information of UE-A, such as medium type, medium link address, media port number etc.;
Step 102, message travels CRBT SE, CRBT SE transmit this request and give called UE-B;
Step 103, called user terminal UE-B shake bell, respond shake bell message, such as sending " 180Ringing " message;
Step 104, CRBT SE reserve the resource of coloring ring back tone playing medium;
Step 105, CRBT SE notice UE-A is new media more, such as sending " 183 Session Progress " message, carries CRBT media resource information, such as carry CRBT medium type, medium link address, media port number etc. in message body;
Step 106, CRBT SE are to UE-A coloring ring back tone playing media information;
Step 107, UE-B answering call send response message to service equipment, such as " 200 OK " message, carry the normal media resource information of UE-B, such as carrying in message body;
Step 108, response message are by way of CRBT SE, and CRBT SE stops the playing media information to UE-A, and after the media resource information in the deletion response message, transmit response message;
Step 109, CRBT SE initiate heavily to consult request to UE-A, such as sending re-INVITE message, are not with any media resource information in the message;
Step 110, UE-A receive the request of heavily consulting, and respond and agree heavy negotiation message, and such as sending " 200OK " message, the normal media resource information of carrying UE-A is such as carrying in message body;
After UE-A receives and heavily consults request, in the heavy negotiation message of the agreement of responding, carry the media resource information that UE-A is using, at this moment, be meant the CRBT media resource information that UE-A is using;
After step 111, CRBT SE receive that UE-A agrees the request of heavily negotiation, initiate heavily to consult request, such as sending re-INVITE message, the normal media resource information of carrying the UE-A that receives in the step 110 to UE-B;
Step 112, UE-B receive the request of heavily consulting, and respond and agree heavy negotiation message, and such as sending " 200OK " message, the normal media resource information of carrying UE-B is such as carrying in message body;
Step 113, CRBT SE receive the request that agreement is heavily consulted, and send to UE-A and confirm the heavily request of negotiation, such as sending ACK (affirmation) message, the normal media resource information of carrying the UE-B that receives in the step 112;
Set up normal session connection between step 114, UE-A and the UE-B.
Fig. 2 is the basic messae flow process figure of existing color image service updating media after answering, it is called to have described calling, the polychrome server in calling procedure to called broadcast polychrome, after user answer, the polychrome server is initiated the situation of media re-negotiation, and its process is as follows:
Step 201, the UE-A request of making a call, the normal media resource information of carrying UE-A such as sending INVITE (invitation) message, is carried the normal media resource information of UE-A in message body, such as medium type, medium link address, media port number etc.;
Step 202, above-mentioned call request are by way of polychrome SE, and polychrome SE reserves the resource of playing the polychrome medium;
The media resource information that step 203, polychrome SE revise in the call request message is the polychrome media resource information of reserving in the step 202, transmits this call request message then and gives called UE-B;
Step 204, called UE-B shake bell, respond shake bell message, such as sending " 180 Ringing " message;
Step 205, CRBT SE transmit shake bell message to UE-A;
Step 206, CRBT SE are to UE-A coloring ring back tone playing media information;
Step 207, called UE-B answering call send response message, such as " 200 OK " message, carry the normal media resource information of UE-B, such as carrying in message body;
Step 208, response message are by way of polychrome SE, and polychrome SE stops the playing media information to UE-A, and transmit response message;
Step 209, polychrome SE initiate heavily to consult request to called UE-B, such as sending re-INVITE message, are not with any media resource information in the message;
Step 210, UE-B receive the request of heavily consulting, and respond and agree heavy negotiation message, and such as sending " 200OK " message, the normal media resource information of carrying UE-B is such as carrying in message body;
After step 211, polychrome SE receive the request that agreement heavily consults, initiate heavily to consult request, such as sending re-INVITE message, the normal media resource information of carrying the UE-B that receives in the step 210 to UE-A;
Step 212, UE-A receive the request of heavily consulting, and respond and agree heavy negotiation message, and such as sending " 200OK " message, the normal media resource information of carrying UE-A is such as carrying in message body;
Step 213, polychrome SE receive the request that agreement is heavily consulted, and send to UE-B and confirm the heavily request of negotiation, such as sending ACK (affirmation) message, the normal media resource information of carrying the UE-A that receives in the step 212;
Set up normal session connection between step 214, UE-A and the UE-B.
The deficiencies in the prior art part is: have CRBT that color image service is arranged again at once, particularly the caller network provides color image service for the called subscriber, and called network is when providing Ring Back Tone service for the calling subscriber, CRBT/polychrome service equipment in two networks can initiate heavily to consult request simultaneously, like this, will cause the wasting of resources on the one hand, on the other hand, the direction that the media re-negotiation request that meeting is initiated owing to CRBT/polychrome service equipment is mail to is different, and causes can't restraining of media re-negotiation.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method of updating media with coloring ring back tone and ring tone services, solves the CRBT/polychrome service equipment of caller network and called network in the prior art and may initiate heavily to consult the problem of asking simultaneously.
In order to address the above problem, the invention provides a kind of method of updating media with coloring ring back tone and ring tone services, CRBT/polychrome service equipment is after receiving the response message of session, judge that whether including CRBT and color image generation in this response message finishes sign, if do not have, then in this response message, add CRBT and color image generation and finish the sign back and transmit this response message, and initiation and calling subscriber and called subscriber's media re-negotiation is with new media more; Otherwise, directly transmit this response message, do not carry out media re-negotiation with calling subscriber and called subscriber.
Further, described CRBT and color image generation finishes sign by use P-Early-Media parametric representation in the header field of described response message.
Further, CRBT/polychrome service equipment is by sending the media re-negotiation of heavily consulting request initiation and calling subscriber and called subscriber, and described heavy negotiation request is mail to the calling subscriber earlier or mail to the called subscriber earlier; After caller/called subscriber receives described heavy negotiation request, respond and agree heavy negotiation message, and in the heavy negotiation message of this agreement, carry caller/called subscriber's normal media resource information.
Further, described heavy negotiation request is a re-INVITE message, and does not carry any media resource information in this re-INVITE message.
Further, when the calling subscriber receives described heavy negotiation request, whether the response message of receiving before judging includes CRBT and color image generation is finished sign, if have, the medium type that allows in this calling subscriber's the normal media resource information when medium type in the media resource information of carrying in the heavy negotiation message of the agreement of then responding is set to only allow to exhale.
Further, the renewal of normal media resource information specifically may further comprise the steps between described calling subscriber and called subscriber:
CRBT/polychrome service equipment initiates heavily to consult request to the calling subscriber, is not with any media resource information in request message;
The calling subscriber receives the request of heavily consulting, and responds and agrees heavy negotiation message, carries calling subscriber's normal media resource information in message;
CRBT/polychrome service equipment initiates heavily to consult request to the called subscriber after receiving the heavy negotiation message of calling subscriber's agreement again, carries the calling subscriber's who receives normal media resource information in request message;
The called subscriber receives the request of heavily consulting, and responds and agrees heavy negotiation message, carries called subscriber's normal media resource information in message;
CRBT/polychrome service equipment sends the request that affirmation is heavily consulted to the calling subscriber after receiving the heavy negotiation message of called subscriber's agreement, carries the called subscriber's who receives normal media resource information in this request message.
Further, the renewal of normal media resource information specifically may further comprise the steps between described calling subscriber and called subscriber:
CRBT/polychrome service equipment initiates heavily to consult request to the called subscriber, is not with any media resource information in request message;
The called subscriber receives the request of heavily consulting, and responds and agrees heavy negotiation message, carries called subscriber's normal media resource information in message;
CRBT/polychrome service equipment initiates heavily to consult request to the calling subscriber after receiving the heavy negotiation message of called subscriber's agreement again, carries the called subscriber's who receives normal media resource information in request message;
The calling subscriber receives the request of heavily consulting, and responds and agrees heavy negotiation message, carries calling subscriber's normal media resource information in message;
CRBT/polychrome service equipment sends the request that affirmation is heavily consulted to the called subscriber after receiving the heavy negotiation message of calling subscriber's agreement, carries the calling subscriber's who receives normal media resource information in this request message.
Description of drawings
Fig. 1 is the basic flow sheet of existing Ring Back Tone service at updating media after answering;
Fig. 2 is the basic flow sheet of existing color image service at updating media after answering;
Fig. 3 is the basic flow sheet of the updating media after answering of the embodiment of the invention;
Fig. 4 is the basic flow sheet of the updating media after answering of the embodiment of the invention;
Fig. 5 is the basic flow sheet of the updating media after answering of the embodiment of the invention.
Embodiment
Below in conjunction with drawings and Examples technical scheme of the present invention is described in detail.
Fig. 3 is under the situation of having only Ring Back Tone service of the embodiment of the invention, the basic flow sheet of updating media after answering, and it is called to have described calling, color ring server in calling procedure to the caller coloring ring back tone playing, after user answer, color ring server is initiated the situation of media re-negotiation, and its process is as follows:
Step 301～307, identical with step 101～107 among Fig. 1;
Step 308, response message are by way of CRBT SE, and CRBT SE stops the playing media information to UE-A, and judge whether have CRBT and color image generation to finish sign in the response message, and then decision does not initiate heavily to consult request;
Media resource information in step 309, the CRBT SE deletion response message, CRBT SE decision initiates heavily to consult request, finishes sign so add CRBT and color image generation in response message, transmits response message then;
CRBT and color image generation finishes sign can use P-Early-Media parametric representation in the Contact header field of message, such as be expressed as " the Contact:UE-B address? P-Early-Media=inactive ";
Step 310, CRBT SE initiate heavily to consult request to called UE-B, such as sending re-INVITE message, are not with any media resource information in the message;
Step 311, UE-B receive the request of heavily consulting, and respond and agree heavy negotiation message, and such as sending " 200OK " message, the normal media resource information of carrying UE-B is such as carrying in message body;
Step 312, CRBT SE receive the request that agreement is heavily consulted, and initiate heavily to consult request to UE-A again, such as sending re-INVITE message, the normal media resource information of carrying the UE-B that receives in the step 311;
Step 313, UE-A receive the request of heavily consulting, and respond and agree heavy negotiation message, and such as sending " 200OK " message, the normal media resource information of carrying UE-A is such as carrying in message body;
Step 314, CRBT SE receive the request that agreement is heavily consulted, and send to UE-B and confirm the heavily request of negotiation, such as sending ACK (affirmation) message, the normal media resource information of carrying the UE-A that receives in the step 313;
Set up normal session connection between step 315, UE-A and the UE-B.
Fig. 4 is under the situation of having only color image service of the embodiment of the invention, the basic flow sheet of updating media after answering, and it is called to have described calling, the polychrome server in calling procedure to called broadcast polychrome, after user answer, the polychrome server is initiated the situation of media re-negotiation, and its process is as follows:
Step 401～407, identical with step 201～207 among Fig. 2;
Step 408, response message are by way of polychrome SE, and polychrome SE stops the playing media information to UE-B, and judge whether have CRBT and color image generation to finish sign in the response message, and then decision does not initiate heavily to consult request;
Step 409, polychrome SE decision initiate heavily to consult request, finish sign so add CRBT and color image generation in response message, transmit response message then;
CRBT and color image generation finishes sign can use P-Early-Media parametric representation in the Contact header field of message, such as be expressed as " the Contact:UE-B address? P-Early-Media=inactive ";
Step 410, polychrome SE initiate heavily to consult request to calling UE-A, such as sending re-INVITE message, are not with any media resource information in the message;
Step 411, UE-A receive the request of heavily consulting, and respond and agree heavy negotiation message, and such as sending " 200OK " message, the normal media resource information of carrying UE-A is such as carrying in message body;
Step 412, polychrome SE receive the request that agreement is heavily consulted, and initiate heavily to consult request to UE-B again, such as sending re-INVITE message, the normal media resource information of carrying the UE-A that receives in the step 411;
Step 413, UE-B receive the request of heavily consulting, and respond and agree heavy negotiation message, and such as sending " 200OK " message, the normal media resource information of carrying UE-B is such as carrying in message body;
Step 414, polychrome SE receive the request that agreement is heavily consulted, and send to UE-A and confirm the heavily request of negotiation, such as sending ACK (affirmation) message, the normal media resource information of carrying the UE-B that receives in the step 413;
Set up normal session connection between step 415, UE-A and the UE-B.
Fig. 5 has CRBT and color image generation when being the embodiment of the invention, the basic flow sheet of updating media after answering, it is called to have described calling, the polychrome server in calling procedure to called broadcast polychrome, color ring server in calling procedure to the caller coloring ring back tone playing, after user answer, color ring server is initiated the situation of media re-negotiation, and its process is as follows:
Step 501, the UE-A request of making a call, the normal media resource information of carrying UE-A such as sending INVITE (invitation) message, is carried the normal media resource information of UE-A in message body, such as medium type, medium link address, media port number etc.;
Step 502, message travels polychrome SE1, polychrome SE1 reserves the polychrome media resource;
The media resource information that step 503, polychrome SE1 revise in the call request message is the polychrome media resource information of reserving in the step 502, transmits this request then and gives called UE-B;
Step 504, message travels CRBT SE2, CRBT SE2 transmit this request and give called UE-B;
Step 505, called UE-B shake bell, respond shake bell message, such as sending " 180 Ringing " message;
Step 506, CRBT SE2 reserve the resource of coloring ring back tone playing medium;
Step 507, CRBT SE2 send Temporary Response to UE-A, such as sending " 183 SessionProgress " message, carry CRBT media resource information, such as carry CRBT medium type, medium link address, media port number etc. in message body;
Step 508, Temporary Response message travels polychrome SE1, polychrome SE1 transmits this Temporary Response;
Step 509, CRBT SE2 are to UE-A coloring ring back tone playing media information;
Step 510, polychrome SE1 play the polychrome media information to UE-B;
Step 511, called UE-B answering call send response message, such as " 200 OK " message, carry the normal media resource information of UE-B, such as carrying in message body;
Step 512, response message are by way of CRBT SE2, and CRBT SE2 stops the playing media information to UE-A, and judge whether have CRBT and color image generation to finish sign in the response message, and then decision does not initiate heavily to consult request;
Media resource information in step 513, the CRBT SE2 deletion response message, and heavily negotiation request of decision initiation finish to identify so add CRBT and color image generation in response message, transmit response message then;
CRBT and color image generation finishes sign can use P-Early-Media parametric representation in the Contact header field of message, such as be expressed as " the Contact:UE-B address? P-Early-Media=inactive ";
Step 514, response message are by way of polychrome SE1, and polychrome SE1 stops the playing media information to UE-B, and judge whether have CRBT and color image generation to finish sign in the response message, have then decision not initiate heavily to consult request;
Step 515, polychrome SE1 decision do not initiate heavily to consult request, give UE-A so transmit response message;
The step of back is for simplify describing, and CRBT SE2 mails to UE-A, and the UE-A message that mails to CRBT SE2 ignored the step by way of polychrome SE1, because of polychrome SE1 just transmits message.
Step 516, CRBT SE2 initiate heavily to consult request to calling UE-A, such as sending re-INVITE message, are not with any media resource information in the message, message travels polychrome service equipment SE1;
Step 517, UE-A receive the request of heavily consulting, and respond and agree heavy negotiation message, and such as sending " 200OK " message, the normal media resource information of carrying UE-A is such as carry this message travels polychrome SE1 in message body;
In order to solve the problem of the medium type that has more than normal media resource information in the CRBT media resource information, in the present embodiment, when UE-A includes CRBT and color image generation end sign in judging response message, the medium type that the media resource information that the medium type in the media resource information of agreeing to carry in the heavy negotiation message is arranged to have carried when only having allowed to exhale can be allowed, the port numbers of the media resource type that (in the step 501) has more when exhaling in the CRBT media resource information of for example UE-A being used is made as 0, and the medium type that has more is not accepted in expression; And increase the medium type that does not have in the CRBT media resource information that has in the step 501 and using.Perhaps, also can directly the media resource information of carrying in the heavy negotiation message of agreement directly be revised as the calling subscriber's who carries in the step 501 when exhaling media resource information.
Step 518, CRBT SE2 receive the request that agreement is heavily consulted, and initiate heavily to consult request to UE-B again, such as sending re-INVITE message, the normal media resource information of carrying the UE-A that receives in the step 517;
Step 519, UE-B receive the request of heavily consulting, and respond and agree heavy negotiation message, and such as sending " 200OK " message, the normal media resource information of carrying UE-B is such as carrying in message body;
Step 520, CRBT SE2 receive the request that agreement is heavily consulted, and send to UE-A and confirm the heavily request of negotiation, such as sending ACK (affirmation) message, the normal media resource information of carrying the UE-B that receives in the step 519, message travels polychrome SE1;
Set up normal session connection between step 521, UE-A and the UE-B.
In the other embodiments of the invention, if the place-exchange of polychrome SE1 and CRBT SE2 once, the process of heavily consulting medium after it is replied is also similar substantially, and that just initiate heavily negotiation request has been polychrome SE1 rather than CRBT SE2.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (5)
1. the method for a updating media with coloring ring back tone and ring tone services is characterized in that,
CRBT/polychrome service equipment is after receiving the response message of session, judge that whether including CRBT and color image generation in this response message finishes sign, if do not have, then in this response message, add CRBT and color image generation and finish the sign back and transmit this response message, and initiation and calling subscriber and called subscriber's media re-negotiation is with new media more; Otherwise, directly transmit this response message, do not carry out media re-negotiation with calling subscriber and called subscriber; CRBT/polychrome service equipment is by sending the media re-negotiation of heavily consulting request initiation and calling subscriber and called subscriber, and described heavy negotiation request is mail to the calling subscriber earlier or mail to the called subscriber earlier; After caller/called subscriber receives described heavy negotiation request, respond and agree heavy negotiation message, and in the heavy negotiation message of this agreement, carry caller/called subscriber's normal media resource information; When the calling subscriber receives described heavy negotiation request, whether the response message of receiving before judging includes CRBT and color image generation is finished sign, if have, the medium type that allows in this calling subscriber's the normal media resource information when medium type in the media resource information of carrying in the heavy negotiation message of the agreement of then responding is set to only allow to exhale.
2. the method for claim 1 is characterized in that, described CRBT and color image generation finishes sign by use P-Early-Media parametric representation in the header field of described response message.
3. the method for claim 1 is characterized in that, described heavy negotiation request is a re-INVITE message, and does not carry any media resource information in this re-INVITE message.
4. the method for claim 1 is characterized in that, the renewal of normal media resource information specifically may further comprise the steps between described calling subscriber and called subscriber:
CRBT/polychrome service equipment initiates heavily to consult request to the calling subscriber, is not with any media resource information in request message;
The calling subscriber receives the request of heavily consulting, and responds and agrees heavy negotiation message, carries calling subscriber's normal media resource information in message;
CRBT/polychrome service equipment initiates heavily to consult request to the called subscriber after receiving the heavy negotiation message of calling subscriber's agreement again, carries the calling subscriber's who receives normal media resource information in request message;
The called subscriber receives the request of heavily consulting, and responds and agrees heavy negotiation message, carries called subscriber's normal media resource information in message;
CRBT/polychrome service equipment sends the request that affirmation is heavily consulted to the calling subscriber after receiving the heavy negotiation message of called subscriber's agreement, carries the called subscriber's who receives normal media resource information in this request message.
5. the method for claim 1 is characterized in that, the renewal of normal media resource information specifically may further comprise the steps between described calling subscriber and called subscriber:
CRBT/polychrome service equipment initiates heavily to consult request to the called subscriber, is not with any media resource information in request message;
The called subscriber receives the request of heavily consulting, and responds and agrees heavy negotiation message, carries called subscriber's normal media resource information in message;
CRBT/polychrome service equipment initiates heavily to consult request to the calling subscriber after receiving the heavy negotiation message of called subscriber's agreement again, carries the called subscriber's who receives normal media resource information in request message;
The calling subscriber receives the request of heavily consulting, and responds and agrees heavy negotiation message, carries calling subscriber's normal media resource information in message;
CRBT/polychrome service equipment sends the request that affirmation is heavily consulted to the called subscriber after receiving the heavy negotiation message of calling subscriber's agreement, carries the calling subscriber's who receives normal media resource information in this request message.
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| CN2008100065937A CN101448202B (en) | 2008-03-13 | 2008-03-13 | Method for updating media with coloring ring back tone and ring tone services |
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| CN2008100065937A CN101448202B (en) | 2008-03-13 | 2008-03-13 | Method for updating media with coloring ring back tone and ring tone services |
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| CN101448202B true CN101448202B (en) | 2011-07-13 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1870691A (en) * | 2005-05-29 | 2006-11-29 | 华为技术有限公司 | Method for listening dailed signal sound at dail line terminal when network communicating |
| CN1960254A (en) * | 2006-11-22 | 2007-05-09 | 北京邮电大学 | Method and system for implementing pass check service of videophone based on IP multimedia subsystem |
| CN101009575A (en) * | 2006-12-30 | 2007-08-01 | 北京邮电大学 | Method for multiple early media services in one call process |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1870691A (en) * | 2005-05-29 | 2006-11-29 | 华为技术有限公司 | Method for listening dailed signal sound at dail line terminal when network communicating |
| CN1960254A (en) * | 2006-11-22 | 2007-05-09 | 北京邮电大学 | Method and system for implementing pass check service of videophone based on IP multimedia subsystem |
| CN101009575A (en) * | 2006-12-30 | 2007-08-01 | 北京邮电大学 | Method for multiple early media services in one call process |
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