CN101448203B - Implement method for controlling early-media playing - Google Patents

Abstract

The invention discloses an implement method for controlling early-media playing, wherein, after a functional entity which controls the early-media sending receives an early-media indication message which does not carry media resource information but carries early-media identification, the functional entity controls a media processing device to continue or stop sending early-media information in a session which the early-media indication message belongs to according to the early-media identification. Compared with the prior art, the method has the advantages as follows: when the functional entity which controls the early-media sending forbids sending a coloring ring back tone media, only the early-media information is forbidden, thereby causing no influence on normal media and session; and after the user responds, a call between a caller and a receiver can be realized without the interaction of media data by re-negotiation.

Description

Control is the implementation method of media play early

Technical field

The present invention relates to the communications field, more specifically, relate in a kind of IP Multimedia System in the call establishment, session is control multimedia messages play service under the situation of dont answer still, also claims the implementation method of media business early.

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 Proxy Call Session Control Function (Proxy-Call Session Control Function, be called for short P-CSCF), query call conversation control function (Interrogating Call Session ControlFunction, be called for short I-CSCF) and service call conversation control function (Serving Call Session ControlFunction, abbreviation S-CSCF) three type, that wherein take the main responsibility is S-CSCF, and I-CSCF is optional.Operation layer is to be made up of a series of application servers (Application Server is called for short AS), is used to provide concrete business service, and AS can be an independent entity, also may reside among the S-CSCF.The S-CSCF of key-course calls the business on the AS according to user's professional triggering of CAMEL-Subscription-Information control, realizes business function.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 session initiation protocol (SessionInitiation Protocol is called for short Session Initiation Protocol) communication.In the business that needs play multimedia information, can need Multimedia Resource Function (Media Resource Function, be called for short MRF) also claim the participation of media server, it is divided into control section MRFC (Multimedia Resource FunctionController, Multimedia resource function controller (MRFC)) and medium processing section MRFP (MultimediaResource Function Processor, Multimedia resource function processor (MRFP)), wherein, control section MRFC is responsible for the translation of the SIP signaling of AS and is interpreted as instruction to MRFP, otherwise perhaps with the translation of the response signaling of MRFP be interpreted as the SIP signaling that sends to SE (Serving Equipment, service equipment); Processing section MRFC then is responsible for the transmission and the reception of Media Stream.Also has a kind of apparatus for media playing, be called media gateway (Media Gateway is called for short MG), MG mainly is responsible for the media information in the legacy network (non-IMS network) is sent to the IMS network, itself and MRF are similar, also are divided into control section MGCF and medium processing section MGW.

Early media business allows in calling procedure, and under the situation of called dont answer still, network is to calling subscriber or called subscriber's play multimedia information, and wherein the business of playing to the calling subscriber claims Ring Back Tone service again, and the business of playing to the called subscriber claims color image service again.

Because MRFC is an entity with AS probably physically, represents in order to simplify flow process, only provides the AS entity in the legend.

Fig. 1 causes the basic messae flow process figure of colorful bell for existing one number service, described in the process of IMS calling subscriber UE-A call IMS called UE-B, called UE-B has opened one number service, require to call out simultaneously UE-B and conventional terminal C, and called UE-B and conventional terminal C have opened Ring Back Tone service, at UE-B and conventional terminal C all still under the situation of dont answer, the CRBT service equipment AS-B of UE-B and the media gateway MG-C of conventional terminal C are to calling UE-A coloring ring back tone playing medium, the process that UE-A requires MG-C to forbid the coloring ring back tone playing medium, wherein one number service is carried out by called S-CSCF (being S-CSCF-B), and its step is as follows:

Step 101, UE-A by S-CSCF-B to the UE-B request of making a call, such as sending INVITE (invitation) message, carry the normal media resource information of UE-A in the message, such as in message body, carrying, comprise information such as medium type, media port number and address, and can inform that network UE-A supports medium early, such as carrying the P-Early-Media field, be worth and be supported;

Step 102 because of UE-B has opened Ring Back Tone service, after S-CSCF-B receives INVITE, is given this forwards according to iFC (Initial Filter Criteria, initial filter standard or norm) the CRBT service equipment AS-B of UE-B;

Step 103～104, AS-B gives UE-B through S-CSCF-B forwarded call request;

Step 105～106, UE-B receives call request, responds Temporary Response message, such as " 183Session Progress " message, message sends to CRBT AS-B through S-CSCF-B;

Step 107～108, CRBT AS-B transmits this Temporary Response message through S-CSCF-B and gives UE-A;

Step 109～110, CRBT AS-B carries out Ring Back Tone service, distribute the CRBT media resource, branch's response technology with standard sends Temporary Response message to UE-A then, such as " 183Session Progress " message, carry CRBT media resource information, such as in message body, carrying, comprise medium type, information such as media port number and address, and portability CRBT media identification to be to inform that caller media resource information is CRBT media resource information, and such as carry non-" supported " value representation with the P-Early-Media field, message sends to UE-A through S-CSCF-B;

Wherein, step 109 does not have precedence relationship with step 103, and can carry out simultaneously.

Step 111, AS-B is to UE-A coloring ring back tone playing media information;

This step and step 110 do not have precedence relationship, must carry out after step 109.

Step 112, S-CSCF-B carries out one number service, with the branch technique of standard again to the conventional terminal C request of making a call, such as sending INVITE, the normal media resource information of carrying the UE-A of acquisition;

This step 112 does not have precedence relationship with step 102, can carry out simultaneously.

Step 113, MG-C comprises MGCF and MGW, after receiving message related to calls, adopt the conventional terminal C in the circuit switching standard procedure calling legacy network, conventional terminal C has opened Ring Back Tone service in legacy network, so the decision of the Ring Back Tone service service equipment of legacy network is to UE-A coloring ring back tone playing media information;

Step 114, MG-C responds Temporary Response message, such as responding " 183Session Progress ", because of needs send the CRBT media information to the calling party, MG-C sends Temporary Response message through S-CSCF-B to the calling party, in Temporary Response message, carry media resource information, such as in message body, carrying, comprise medium type, media port number and address etc., and portability CRBT media identification is to inform that caller media resource information is CRBT media resource information, such as carry non-" supported " value representation with the P-Early-Media field;

Step 115, S-CSCF-B transmits this Temporary Response message and gives UE-A;

Step 116, MG-C is to calling UE-A coloring ring back tone playing media information;

This step 116 does not have precedence relationship with step 115, but must carry out after step 114.

Step 117～118, UE-A will stop the CRBT media play of conventional terminal C, forbid sending medium so require the legacy network of conventional terminal C, such as sending UPDATE (renewal) message or PRACK (pre-affirmation) message, carry the media resource information of UE-A, such as in message body, carrying, wherein the attribute of each medium type is set to not allow the other side to send, such as the property column a that each medium type is set is sendonly (only sending) or inactive (deexcitation), and message arrives MG-C through S-CSCF-B;

Step 119～120, MG-C receives medium Indication message early, stop to send media information, and agree to forbid sending medium, such as responding " 200OK " message, the media resource information of carrying MG-C, such as in message body, carrying, wherein the attribute of each medium type is set to not allow send, and is recvonly (only receiving) or inactive such as the capable value of a that each medium type is set, and message arrives UE-A through S-CSCF-B;

Step 121, conventional terminal C has replied calling, so the legacy network of conventional terminal C has stopped the broadcast of CRBT medium;

Step 122～123, MG-C receives the signaling of replying of conventional terminal C, send response message to UE-A, such as sending " 200OK " message, because of normal medium use identical media resource with the CRBT medium, therefore this message is not carried media resource information, and response message sends to UE-A through S-CSCF-B;

Step 124～125, UE-A receives response message, require the legacy network of conventional terminal C to allow to send medium, such as sending reINVITE (heavily inviting) message, carry the media resource information of UE-A, such as carrying in message body, wherein the attribute of each medium type is set to allow the other side to send, such as the property column a that each medium type is set is sendrecv (send and receive) or recvonly, and message arrives MG-C through S-CSCF-B;

Step 126～127, after MG-C receives heavy invitation message, agree to send medium, such as responding " 200OK " message, carry the media resource information of MG-C, such as carrying in message body, wherein the attribute of each medium type is set to allow to send, such as the capable value of a that each medium type is set is sendrecv or sendonly, and message sends to UE-A through S-CSCF-B;

Step 128, the medium transfer by MG-C between UE-A and the conventional terminal C realizes conversation, the session between UE-A and UE-B is stopped by standard procedure by S-CSCF-B.

The deficiencies in the prior art part is: when the functional entity of notice control medium transmission early forbids sending the CRBT medium, all medium that comprise CRBT and normal medium are all forbidden, thereby session is impacted; And, after user answer, might need heavily to consult to allow the mutual conversation that could realize calling and called of media data, this is unreasonable.

Summary of the invention

The technical problem to be solved in the present invention provides a kind of implementation method of media play early of controlling, and after user answer, does not need just can realize conversation by heavily consulting to carry out the mutual of media data.

In order to address the above problem, the invention provides a kind of implementation method of media play early of controlling, the control early functional entity that sends of medium is being received the morning of not carrying media resource information and carrying media identification early behind the medium Indication message, continues or stop to send early-media information in the session under described morning of the medium Indication message according to described media identification control morning medium processing device.

Further, described morning, the medium Indication message was UPDATE message or the PRACK message that calling subscriber or application server send.

Further, described morning, media identification was carried by the P-Early-Media field in the message body, and the value of this P-Early-Media field is not " supported ".

Further, when described P-Early-Media field value was sendonly or inactive, expression forbade continuing to send early-media information; When being sendrecv or recvonly, described P-Early-Media field value represents to allow to continue to send early-media information.

Further, if the functional entity of described control medium transmission is early supported media identification early, then

In morning of receiving that described P-Early-Media field value is sendonly or inactive behind the medium Indication message, return and agree to forbid continuing to send receiveing the response of early-media information, and in receiveing the response, carry media identification morning that the P-Early-Media field value is recvonly or inactive;

In morning of receiving that described P-Early-Media field value is sendrecv or recvonly behind the medium Indication message, return and agree to allow to continue to send receiveing the response of early-media information, and in receiveing the response, carry media identification morning that the P-Early-Media field value is sendrev or sendonly.

Further, if media identification is not early supported in the described control early functional entity that sends of medium, the control of then supporting media identification early is the functional entity that sends of medium receiveing the response and whether carry media identification decision early and whether control medium processing device and continue or stop to send described early-media information according to medium Indication message morning early.

Further, the support in the path of medium Indication message process early early media identification control early the functional entity that sends of medium whether control medium processing device according to medium Indication message decision morning and continue or stop to send described early-media information.

Further, the functional entity of described control medium transmission early is an application server, or MGCF, or Proxy Call Session Control Function;

Described medium processing device is a Multimedia resource function processor (MRFP), or media gateway, or the medium processing device of IP bearer network.

Compared with prior art, the implementation method of controlling media play morning of the present invention has the following advantages: when the functional entity of notice control medium transmission early forbids sending the CRBT medium, only early-media information is forbidden, thereby can not impacted normal medium and session; After user answer, do not need heavily to consult to carry out the mutual conversation that just can realize calling and called of media data.

Description of drawings

Fig. 1 causes the basic messae flow process figure of colorful bell for one number service in the prior art;

Fig. 2 is the basic messae flow process figure of the embodiment of the invention;

Fig. 3 is the basic messae flow process figure of another embodiment of the present invention;

Fig. 4 is the basic messae flow process figure of further embodiment of this invention.

Embodiment

Main thought of the present invention is: need be to the broadcast when controlling of medium morning, notify the functional entity of corresponding control medium transmission early to forbid sending medium early, rather than forbid comprising all medium of medium and normal medium early, thereby avoided defective of the prior art, promptly after user answer, also need by mutual with the necessary media data of conversing of the medium heavily consulting to allow to be forbidden.

Particularly, be example with the CRBT medium in the morning media business, the control of the present invention early implementation method of media play comprises:

When calling subscriber or CRBT AS need control functional entity that medium early send (as CRBT AS, MGCF or P-CSCF) when stopping the coloring ring back tone playing medium, send UPDATE (renewal) or PRACK (confirming in advance) message and give the functional entity of control medium transmission early, be not with any media resource information in the message, and carry media identification early, such as carrying the P-Early-Media field, value is sendonly or inactive, requirement stops to send medium early, after the functional entity of control medium transmission is early received this UPDATE or PRACK message, control MRFP, the medium processing devices such as medium processing device of MGW or IP bearer network stop to send early-media information;

And when calling subscriber or CRBT AS or P-CSCF need control this control early the functional entity that sends of medium continues the coloring ring back tone playing medium again, send UPDATE or PRACK message functional entity to control medium transmission early, be not with any media resource information, and carry media identification early, such as carrying the P-Early-Media field, value is sendrecv or recvonly, require to continue to send medium early, after the functional entity of control medium transmission is early received this UPDATE or PRACK message, control MRFP, the medium processing devices such as medium processing device of MGW or IP bearer network continue to send early-media information.

Below in conjunction with the accompanying drawings and the specific embodiments implementation method of the present invention is described in more detail.

Embodiment one

Fig. 2 causes the basic messae flow process figure of colorful bell for one number service of the present invention, described in the process of IMS calling UE-A call IMS called UE-B, called UE-B has opened one number service, require to call out simultaneously UE-B and conventional terminal C, and called UE-B and conventional terminal C have opened Ring Back Tone service, UE-B and conventional terminal C are still under the situation of dont answer, the CRBT service equipment AS-B of UE-B and the MG-C of conventional terminal C are to calling UE-A coloring ring back tone playing medium, UE-A requires CRBT AS-B and MG-C to forbid the process of coloring ring back tone playing medium respectively, wherein one number service is carried out by called S-CSCF (being S-CSCF-B), for simplifying flow process, omitted P-CSCF among the figure.As shown in Figure 2, its step is as follows:

Step 201～216, identical with step 101～116 among Fig. 1;

Step 217～218, UE-A will stop the CRBT media play of conventional terminal C, so sending early, the medium Indication message requires the legacy network of conventional terminal C to forbid sending medium early, such as sending UPDATE message or PRACK message, be not with any media resource information, and carry media identification early, such as carrying the P-Early-Media field, value is sendonly or inactive, and message sends to MG-C through S-CSCF-B;

Step 219～220, after MG-C receives above-mentioned message, stop to send early-media information, and agree to forbid to send medium early, such as responding " 200OK " message, be not with any media resource information, and can in receiveing the response, carry media identification early, such as carrying the P-Early-Media field, be worth and be recvonly or inactive, message sends to UE-A through S-CSCF-B;

Step 221～222, if UE-A also will stop the CRBT media play of UE-B, so require B side to forbid sending medium early, such as sending UPDATE message or PRACK message, be not with any media resource information, and carry media identification early, such as carrying the P-Early-Media field, value is sendonly or inactive, and message sends to CRBT AS-B through S-CSCF-B;

Step 223～224, AS-B receives medium Indication message early, the indication apparatus for media playing stops to send early-media information, and agree to forbid to send medium early, such as responding " 200OK " message, be not with any media resource information, portability is media identification early, such as carrying the P-Early-Media field, be worth and be recvonly or inactive, message sends to UE-A through S-CSCF-B;

Step 225, conventional terminal C has replied calling, so the legacy network of conventional terminal C has stopped the broadcast of CRBT medium;

Step 226～227, MG-C receives the signaling of replying of conventional terminal C, send response message to UE-A, such as sending " 200OK " message, because of normal medium use identical media resource with the CRBT medium, therefore this message is not carried media resource information, and response message sends to UE-A through S-CSCF-B;

Step 228, between UE-A and conventional terminal C, by the medium transfer realization conversation of MG-C, the session between UE-A and UE-B uses standard procedure to be stopped by S-CSCF-B.

Wherein, MG/MGCF has been embodied as the control of the functional entity of controlling medium transmission early to media play morning in step 217～220, and AS has been embodied as the control of the functional entity of controlling medium transmission early to media play morning in step 221～224.

Embodiment two

Fig. 3 provides the basic messae flow process figure of unique CRBT for one number service of the present invention, having described IMS calling UE-A calls out in the process of conventional terminal B, conventional terminal B has opened one number service and the one number service CRBT is provided in the IMS network, require to call out simultaneously conventional terminal B and conventional terminal C, and conventional terminal C has opened Ring Back Tone service in legacy network, conventional terminal B and conventional terminal C are still under the situation of dont answer, one number service service equipment AS forbids that MG-C is to calling UE-A coloring ring back tone playing medium, and play the process of one number service CRBT medium for UE-A, wherein one number service is carried out by called AS, represent for simplifying flow process, the one number service Ring Back Tone service is also carried out by this AS, and has omitted P-CSCF among the figure.As shown in Figure 3, its step is as follows:

Step 301～302, UE-A calls out conventional terminal B, such as sending INVITE, carry the normal media resource information of UE-A in the message,, comprise information such as medium type, media port number and address such as in message body, carrying, and can inform that network UE-A supports medium early, such as carrying the P-Early-Media field, be worth and be supported, message is given one number service AS through the S-CSCF route;

Step 303～304, conventional terminal B is given in one number service AS forwarded call request, and message sends to MG-B through S-CSCF;

Step 305, MG-B adopts the conventional terminal B in the circuit switching standard procedure calling legacy network;

Step 306～307, MG-B responds Temporary Response message, and such as " 183Session Progress " message, message sends to one number service AS through S-CSCF;

Step 308～309, one number service AS transmits this Temporary Response message through S-CSCF and gives UE-A;

Step 310～311, one number service AS carries out one number service, with the branch technique of standard again to the conventional terminal C request of making a call, such as sending INVITE, the normal media resource information of carrying the UE-A of acquisition, message sends to MG-C through S-CSCF;

This step and step 303 do not have precedence relationship, and can carry out simultaneously.

Step 312, MG-C adopts the conventional terminal C in the circuit switching standard procedure calling legacy network, and conventional terminal C has opened Ring Back Tone service in legacy network, so the Ring Back Tone service service equipment of legacy network is to calling party's coloring ring back tone playing media information;

Step 313～314, MG-C responds Temporary Response message, such as responding " 183SessionProgress ", because of needs send the CRBT media information to the calling party, MG-C carries media resource information in Temporary Response message, such as in message body, carrying, comprise medium type, media port number and address etc., and portability CRBT media identification is to inform that caller media resource information is CRBT media resource information, such as carry non-" supported " value representation with the P-Early-Media field, message sends to one number service AS through S-CSCF;

Step 315～316, one number service AS will provide unique CRBT media information, stop media play morning of conventional terminal C, the medium Indication message requires the legacy network of conventional terminal C to forbid sending medium early so send early, such as sending UPDATE message or PRACK message, is not with any media resource information, and carry media identification early, such as carrying the P-Early-Media field, be worth and be sendonly or inactive, message sends to MG-C through S-CSCF;

Step 317～318, MG-C receives medium Indication message early, stop to send early-media information, and agree to forbid to send medium early, such as responding " 200OK " message, be not with any media resource information, portability is media identification early, such as in receiveing the response, carrying the P-Early-Media field, be worth and be recvonly or inactive, message sends to one number service AS through S-CSCF;

The value of the P-Early-Media field of carrying in described the receiveing the response is to be provided with corresponding to sendonly among UPDATE message or the PRACK or inactive; If medium Indication message morning that MG-C receives is allow to continue to send medium early, promptly the value among UPDATE message or the PRACK is sendrecv or recvonly, then can carry the P-Early-Media field in receiveing the response, and is worth for sendrecv or sendonly.

Step 319～320, through S-CSCF transmit this message and give UE-A after the media identification morning of the Temporary Response message of receiving in the one number service AS deletion step 314;

Step 321～322, one number service AS carries out Ring Back Tone service, distribute the CRBT media resource, branch's response technology with standard sends Temporary Response message to UE-A then, such as " 183Session Progress " message, carry one number service CRBT media resource information, such as in message body, carrying, comprise medium type, information such as media port number and address, and portability early media identification is to inform that caller media resource information is media resource information early, such as carry non-" supported " value representation with the P-Early-Media field, message sends to UE-A through S-CSCF;

This step and step 303 do not have precedence relationship, and can carry out simultaneously.

Step 323, one number service AS is to UE-A coloring ring back tone playing media information;

This step and step 322 do not have precedence relationship, must carry out after step 321.

Step 324, conventional terminal C has replied calling, so the legacy network of conventional terminal C has stopped the broadcast of CRBT medium;

Step 325～326, MG-C receives the signaling of replying of conventional terminal C, send response message to UE-A, such as sending " 200OK " message, because of normal medium use identical media resource with the CRBT medium, therefore this message is not carried media resource information, and response message arrives one number service AS through S-CSCF;

Step 327, one number service AS stops to play one number service CRBT media information;

Step 328～329, one number service AS transmits response message and gives UE-A, and message is through S-CSCF;

Step 330, between UE-A and conventional terminal C, by the medium transfer realization conversation of MG-C, the session between UE-A and conventional terminal B uses standard procedure to be stopped by one number service AS.

This embodiment has embodied MG as the control of the functional entity of controlling medium transmission early to media play morning, wherein MG controls according to the media information of forbidding sending early that AS sends, but MG also can or continue to send the control of the Indication message realization of medium early to media play morning according to forbidding of sending of UE-A in other embodiments of the invention.

Embodiment three

Fig. 4 causes the basic messae flow process figure of colorful bell for one number service of the present invention, having described IMS calling UE-A calls out in the process of conventional terminal B, conventional terminal B has opened one number service in the IMS network, require to call out simultaneously conventional terminal B and conventional terminal C, and conventional terminal B and C have opened Ring Back Tone service in legacy network, conventional terminal B and conventional terminal C are still under the situation of dont answer, legacy network B and legacy network C are to UE-A coloring ring back tone playing media information, the process that UE-A requires MG-C to forbid the coloring ring back tone playing medium, wherein one number service can be carried out by S-CSCF, and its step is as follows:

Step 401～402, UE-A calls out conventional terminal B, such as sending INVITE, carry the normal media resource information of UE-A in the message,, comprise information such as medium type, media port number and address such as in message body, carrying, and can inform that network UE-A supports medium early, such as carrying the P-Early-Media field, be worth and be supported, message sends to S-CSCF through P-CSCF;

Step 403, conventional terminal B is given in S-CSCF forwarded call request;

Step 404, message related to calls is through MG-B, MG-B adopts the conventional terminal B in the circuit switching standard procedure calling legacy network, and conventional terminal B has opened Ring Back Tone service in legacy network, so the Ring Back Tone service service equipment of legacy network is to calling party's coloring ring back tone playing media information;

Step 405, MG-B responds Temporary Response message, such as responding " 183Session Progress ", because of needs send the CRBT media information to the calling party, MG-B carries media resource information in Temporary Response message, such as carrying in message body, comprise medium type, media port number and address etc., and portability CRBT media identification is to inform that caller media resource information is CRBT media resource information, such as carry non-" supported " value representation with the P-Early-Media field;

Step 406～407, Temporary Response message are through S-CSCF, and S-CSCF transmits this Temporary Response message through P-CSCF and gives UE-A;

Step 408, MG-B sends the CRBT media information to calling UE-A;

This step and step 407 do not have precedence relationship, but must carry out after step 406.

Step 409, S-CSCF carries out one number service, with the branch technique of standard again to the conventional terminal C request of making a call, such as sending INVITE (invitation) message, the normal media resource information of carrying the UE-A of acquisition;

This step and step 403 do not have precedence relationship, and can carry out simultaneously.

Step 410, message related to calls is through MG-C, MG-C adopts the conventional terminal C in the circuit switching standard procedure calling legacy network, and conventional terminal C has opened Ring Back Tone service in legacy network, so the Ring Back Tone service service equipment of legacy network is to calling party's coloring ring back tone playing media information;

Step 411, MG-C responds Temporary Response message, such as responding " 183 Session Progress ", because of needs send the CRBT media information to the calling party, MG-C carries media resource information in Temporary Response message, such as carrying in message body, comprise medium type, media port number and address etc., and portability CRBT media identification is to inform that caller media resource information is CRBT media resource information, such as carry non-" supported " value representation with the P-Early-Media field;

Step 412～413, Temporary Response message are through S-CSCF, and S-CSCF transmits this Temporary Response message through P-CSCF and gives UE-A;

Step 414, MG-C sends the CRBT media information to calling UE-A;

This step and step 413 do not have precedence relationship, must carry out after step 412.

Step 415～417, UE-A will stop the CRBT media play of conventional terminal C, so sending early, the medium Indication message requires the legacy network of conventional terminal C to forbid sending medium early, such as sending UPDATE (renewal) message or PRACK (pre-affirmation) message, be not with any media resource information, and carry media identification early, such as carrying the P-Early-Media field, value is sendonly or inactive, and message sends to MG-C through P-CSCF and S-CSCF;

Step 418～420, MG-C receives medium Indication message early, but MG-C is old equipment, do not support the P-Early-Media field,, still do not stop to send media data early so ignore this message, and send by standard and to receive the response, such as responding " 200OK " message, do not carry any media resource information, message arrives UE-A through S-CSCF and P-CSCF;

Step 421, the message of P-CSCF energy identification step 415, can directly determine to carry out media control function, also can whether carry media identification early according to receiveing the response in the step 419, control the medium processing device that is positioned at the IP bearer network and do not transmit the early-media information that MG-C sends to UE-A, wherein, to stop to send the process of medium are standard procedures to P-CSCF control bearer network medium processing device;

Step 422～424, the user wants again to have heard the CRBT of conventional terminal C, this moment, UE-A will continue the CRBT media play of conventional terminal C, so require the legacy network of conventional terminal C to allow to send medium early,, be not with any media resource information such as sending UPDATE (renewal) message or PRACK (confirming in advance) message, and carry media identification early, such as carrying the P-Early-Media field, be worth and be sendrecv or recvonly, message sends to MG-C through P-CSCF and S-CSCF;

Step 425～427, MG-C receives medium Indication message early, but MG-C is old equipment, do not support this message,, still do not stop to send media data early so ignore this message, and send by standard and to receive the response, such as responding " 200OK " message, do not carry any media resource information, message sends to UE-A through P-CSCF and S-CSCF;

Step 428, the message of P-CSCF energy identification step 422, and decision execution media control function continue to transmit the early-media information that MG-C sends to UE-A;

Step 429, conventional terminal C has replied calling, so the legacy network of conventional terminal C has stopped the broadcast of CRBT medium;

Step 430～431, MG-C receives the signaling of replying of conventional terminal C, send response message to UE-A, such as sending " 200OK " message, because of normal medium use identical media resource with the CRBT medium, therefore this message is not carried media resource information, and response message sends to P-CSCF through S-CSCF;

Step 432, P-CSCF receives response message, carries out media control function, transmits MG-C and sends to the media information of UE-A and the media information that UE-A sends to MG-C;

Step 433, the medium transfer by MG-C between UE-A and the conventional terminal C realizes conversation, the session between UE-A and conventional terminal B uses standard procedure to be stopped by S-CSCF.

Present embodiment has embodied P-CSCF as the control of the functional entity realization of controlling medium transmission early to media play morning.

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.For example, the inventive method can also be applied in the non-one number service morning media play control, and suitable equally for the color image service the inventive method in the morning media business.

Claims (7)

1. control the implementation method of media play early for one kind, it is characterized in that,

The control early functional entity that sends of medium is being received the morning of not carrying media resource information and carrying media identification early behind the medium Indication message, continues or stop to send early-media information in the session under described morning of the medium Indication message according to described media identification control morning medium processing device; Described morning, media identification was carried by the P-Early-Media field in the message body, and the value of this P-Early-Media field is not " supported ".

2. implementation method as claimed in claim 1 is characterized in that,

Described morning, the medium Indication message was UPDATE message or the PRACK message that calling subscriber or application server send.

3. implementation method as claimed in claim 1 is characterized in that,

When described P-Early-Media field value was sendonly or inactive, expression forbade continuing to send early-media information; When being sendrecv or recvonly, described P-Early-Media field value represents to allow to continue to send early-media information.

4. implementation method as claimed in claim 3 is characterized in that,

If the functional entity of described control medium transmission is early supported media identification early, then

In morning of receiving that described P-Early-Media field value is sendonly or inactive behind the medium Indication message, return and agree to forbid continuing to send receiveing the response of early-media information, and in receiveing the response, carry media identification morning that the P-Early-Media field value is recvonly or inactive;

In morning of receiving that described P-Early-Media field value is sendrecv or recvonly behind the medium Indication message, return and agree to allow to continue to send receiveing the response of early-media information, and in receiveing the response, carry media identification morning that the P-Early-Media field value is sendrecv or sendonly.

5. implementation method as claimed in claim 3 is characterized in that,

If media identification is not early supported in the described control early functional entity that sends of medium, the control of then supporting media identification early is the functional entity that sends of medium receiveing the response and whether carry media identification decision early and whether control medium processing device and continue or stop to send described early-media information according to medium Indication message morning early.

6. implementation method as claimed in claim 4 is characterized in that,

The support in the path of medium Indication message process early early media identification control early the functional entity that sends of medium whether control medium processing device according to medium Indication message decision morning and continue or stop to send described early-media information.

7. implementation method as claimed in claim 4 is characterized in that,

The functional entity of described control medium transmission early is an application server, or MGCF, or Proxy Call Session Control Function;

Described medium processing device is a Multimedia resource function processor (MRFP), or media gateway, or the medium processing device of IP bearer network.

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