CN102111386B - Early media implementation method and device - Google Patents
Early media implementation method and device Download PDFInfo
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- CN102111386B CN102111386B CN200910247082.9A CN200910247082A CN102111386B CN 102111386 B CN102111386 B CN 102111386B CN 200910247082 A CN200910247082 A CN 200910247082A CN 102111386 B CN102111386 B CN 102111386B
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Abstract
The embodiment of the invention discloses an early media implementation method and device. The method comprises the following steps: a call request including a color ring media session description protocol (SDP) and a session media SDP to a proxy call session control function (P-CSCF); the color ring media access information returned by the P-CSCF is received; connection of color ring media is set on a network side according to the color ring media access information; the session media access information returned by the P-CSCF is received; and connection of the session media is set on the network side according to the session media access information. The above technical scheme has the benefits that the color ring media SDP and the session media SDP supported by the calling terminal are added to the call request information, and the network side can respectively allocate the color ring media resource and the session media resource according to the color ring media SDP supported by the calling terminal and the session media SDP, so that respective reservation of both the color ring media resource and the session media resource is realized.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of implementation method of Early media and device.
Background technology
Internet protocol multi-media sub-system (Internet protocol Multimedia Subsystem, IMS) be 3G (Third Generation) Moblie partnership projects (Third Generation Partnership Project Release 5,3GPP R5) IP multimedia subsystem, IMS of stage definitions, introduced Session initiation Protocol (Session InitiationProtocol, SIP) as Service control agreement, utilize that SIP is simple, easy expansion, media combination feature easily, by providing abundant multimedia service by Service control is separated with Bearer Control.
Major function entity in IMS comprises: call conversation control function entity (Call SessionControl Function, CSCF), and CSCF comprises tri-kinds of P/I/S-CSCF, is for controlling the controlling call entity of the functions such as user's registration, session; Home subscriber server (Home Subscriber Server, HSS), for managing user contracting data concentratedly; Application server (Application Server, AS), for providing miscellaneous service logic control function.User is by current location agent node P-CSCF access IMS; Session between calling terminal and terminal called and business trigger to be controlled and carries out alternately with the Service control of AS, by the registered place of terminal, returns ground S-CSCF to complete.
Session Description Protocol (Session Description Protocol, SDP) is the form of describing Streaming Media initiation parameter.In media session, transmit medium stream information, allow the recipient of conversation description to participate in session.SDP can comprise following information: 1) title of session and object, 2) the session survival time, 3) be included in the media information in session, as: medium type, host-host protocol, media formats, multicast or far-end (clean culture) address and port, 4) bandwidth information 6 of the information needing for receiving media, 5) using) reliable contact information etc.Usually said media SDP, represents by the various information of these media of SDP protocol description.
Early media (Early Media) is the Streaming Media before formal call, such as CRBT media, polychrome media, trouble back tone media etc.; The media that conversation media is used for formal call; Terminal is being set up Early media with network side and conversation media all needs the corresponding communication resource, and the above-mentioned communication resource can complete by the negotiation of terminal and network side.
In IMS, the method for terminal and network side negotiation access-in resource can be: terminal sends access request to network side, the media SDP that above-mentioned access request carried terminal is supported; Network side is terminal distribution access-in resource according to above-mentioned media SDP, then to terminal, sends media access information, by the access-in resource information notification terminal of above-mentioned distribution; Terminal accesses according to above-mentioned resource allocation information.At follow-up terminal and network side, carry out the access-in resource that the process of Early media and conversation media is all used above-mentioned network side to distribute.
Inventor finds in realizing process of the present invention: the media SDP that network side sends according to terminal carries out the reserved of media access-in resource, and the connection of using this reserved media access-in resource to set up Early media, the connection that disconnects the connection of Early media and use above-mentioned reserved media access-in resource to set up conversation media when conversation media need to connect.Due to Early media and conversation media conventionally to access-in resource require differently, so Early media and conversation media are used identical access-in resource, be inappropriate.For example: the bandwidth of Early media utilized bandwidth ratio conversation media is little, if network side is the resource that calling terminal distributes, be adapted to Early media, conversation media can cause speech quality poor due to bandwidth deficiency so; If network side is the resource that calling terminal distributes, be adapted to conversation media, Early media takies too much bandwidth waste bandwidth resources so.
Summary of the invention
The technical problem that the embodiment of the present invention will solve is to provide a kind of implementation method and device of Early media, can realize reserving Early media access-in resource and conversation media access-in resource respectively.
For solving the problems of the technologies described above, the implementation method embodiment of Early media provided by the present invention can be achieved through the following technical solutions:
To call conversation control function entity P-CSCF, send call request, described call request comprises CRBT media session and describes agreement SDP and conversation media SDP;
Receive the CRBT media access information that described P-CSCF returns;
According to described CRBT media access information, set up being connected of CRBT media with network side;
Receive the conversation media access information that described P-CSCF returns;
According to described conversation media access information, set up being connected of conversation media with network side.
An implementation method for Early media, comprising:
Receive the call request that calling terminal sends, described call request comprises CRBT media SDP and conversation media SDP;
To multimedia calling identification server MCID AS, send described call request to obtain CRBT media access information and conversation media access information;
Receive the session progress message that MCID AS returns according to described call request, described session progress message comprises CRBT media access information and conversation media access information;
The connection of setting up CRBT media according to described CRBT media access information; According to described conversation media access information, setting up conversation media connects.
An implementation method for Early media, comprising:
Reception is from the call request of calling terminal, and described call request comprises conversation media SDP and CRBT media SDP;
According to described call request, judge the described calling terminal polychrome media business of whether having contracted;
If so, in described call request, add polychrome media SDP;
The call request that adds polychrome media SDP described in sending to MRBT AS;
Receive the session progress message that MRBT AS sends, described session progress message comprises CRBT media access information, polychrome media access information and conversation media access information, the connection that described CRBT media access information, polychrome media access information and conversation media access information are respectively used to set up CRBT media, polychrome media and conversation media.
An implementation method for Early media, comprising:
Receipt of call request, described call request comprises polychrome media SDP, CRBT media SDP and conversation media SDP;
Delete described CRBT media SDP, the call request of described modification is sent to terminal called;
Receive the session progress message that described terminal called returns, described session progress message comprises polychrome media access information and conversation media access information; In the described session progress message of returning, refill and forbid described CRBT media SDP;
To MRBT AS, send amended session progress message, so that MRBT AS obtains CRBT media access information, the connection of described CRBT media access information for setting up CRBT media.
An implementation method for Early media, comprising:
Receive the session progress message that called end P-CSCF sends, described session progress message comprises conversation media access information and CRBT media SDP;
According to the CAMEL-Subscription-Information of terminal called, judge the described terminal called Ring Back Tone service of whether having contracted, if, to MRS, send described session progress message and obtain CRBT media access information, and the CRBT media SDP in described session progress message is revised as to described CRBT media access information;
The session progress message of revising to calling terminal P-CSCF transmission is to set up respectively the connection of CRBT media and the connection of conversation media.
An implementation method for Early media, comprising:
Receive the call request that MCID AS sends, described call request comprises CRBT media SDP and conversation media SDP;
According to described call request, to MCID AS, send session progress message, so that obtain CRBT media access information and conversation media access information, the connection of described CRBT media access information for setting up CRBT media, the connection of described conversation media access information for setting up conversation media.
An implementation method for Early media, comprising:
Receipt of call request, adds described call request by conversation media SDP and CRBT media SDP;
To MRBT AS, send described amended call request, to obtain CRBT media access information and conversation media access information, the connection of described CRBT media access information for setting up CRBT media, the connection of described conversation media access information for setting up conversation media.
A terminal, comprising:
Request transmitting unit, for sending call request to call conversation control function entity P-CSCF, described call request comprises CRBT media session and describes agreement SDP and conversation media SDP;
Receiving element, the CRBT media access information and the conversation media access information that for receiving described P-CSCF, return;
Connect and set up unit, for setting up being connected of CRBT media according to described CRBT media access information with network side; According to described conversation media access information, set up being connected of conversation media with network side.
A proxy call conversation control function entity P-CSCF, comprising:
Request reception unit, the call request sending for receiving calling terminal, described call request comprises CRBT media SDP and conversation media SDP;
Transmitting element, for sending described call request to obtain CRBT media access information and conversation media access information to multimedia calling identification server MCID AS;
Response receiving element, the session progress message of returning according to described call request for receiving MCID AS, described session progress message comprises CRBT media access information and conversation media access information;
Connect and set up unit, for the connection of setting up CRBT media according to described CRBT media access information; According to described conversation media access information, setting up conversation media connects.
A multimedia calling identification server MCID AS, comprising:
Request reception unit, for receiving the call request from calling terminal, described call request comprises conversation media SDP and CRBT media SDP;
Judging unit, for judging the described calling terminal polychrome media business of whether having contracted according to described call request;
Adding device while for judgment result is that at judging unit being, adds polychrome media SDP in described call request;
Request transmitting unit, for the call request to adding polychrome media SDP described in MRBT AS transmission;
Progress receiving element, the session progress message sending for receiving MRBT AS, described session progress message comprises CRBT media access information, polychrome media access information and conversation media access information, the connection that described CRBT media access information, polychrome media access information and conversation media access information are respectively used to set up CRBT media, polychrome media and conversation media.
A P-CSCF, comprising:
Request reception unit, for receipt of call request, described call request comprises polychrome media SDP, CRBT media SDP and conversation media SDP;
Delete cells, for deleting described CRBT media SDP;
Request transmitting unit, sends to terminal called by the call request of described modification;
Progress receiving element, the session progress message of returning for receiving described terminal called, described session progress message comprises polychrome media access information and conversation media access information;
Information control unit, for refilling in the described session progress message of returning and forbidding described CRBT media SDP;
Progress transmitting element, for sending amended session progress message, so that MRBT AS obtains CRBT media access information to MRBT AS.
A Multimedia Ringback Tone Server MRBT AS, comprising:
Progress receiving element, the session progress message sending for receiving called end P-CSCF, described session progress message comprises conversation media access information and CRBT media SDP;
Judging unit, for judging the described terminal called Ring Back Tone service of whether having contracted according to the CAMEL-Subscription-Information of terminal called;
Progress transmitting element, judgment result is that for judging unit to be, to MRS, sends described session progress message and obtains CRBT media access information; The session progress message of revising to calling terminal P-CSCF transmission is to set up respectively the connection of CRBT media and the connection of conversation media;
Revise unit, for the CRBT media SDP of described session progress message is revised as to described CRBT media access information.
A MGCF entity MGCF, comprising:
Request reception unit, the call request sending for receiving MCID AS, described call request comprises CRBT media SDP and conversation media SDP;
Progress transmitting element, for sending session progress message according to described call request to MCID AS, so that obtain CRBT media access information and conversation media access information, the connection of described CRBT media access information for setting up CRBT media, the connection of described conversation media access information for setting up conversation media.
A MGCF entity MGCF, comprising:
Request reception unit, for receipt of call request;
Information adding device, for adding described call request by conversation media SDP and CRBT media SDP;
Request transmitting unit, for sending described amended call request to MRBT AS, to obtain CRBT media access information and conversation media access information, the connection of described CRBT media access information for setting up CRBT media, the connection of described conversation media access information for setting up conversation media.
Technique scheme has following beneficial effect: the conversation media SDP that adds CRBT media SDP and calling terminal to support in call request message, network side can distribute respectively CRBT media resource and conversation media resource according to the CRBT media SDP of caller support and conversation media SDP, has realized reserving respectively CRBT media resource and conversation media resource.So just avoided conversation media and the mutual interference of Early media phase, and then can guarantee good speech quality or save bandwidth resources.
Accompanying drawing explanation
The schematic flow sheet of the method that Fig. 1 realizes for a kind of Early media that the embodiment of the present invention one provides;
The some of the method flow schematic diagram that Fig. 2 a realizes for a kind of Early media that the embodiment of the present invention two provides;
Another part of the method flow schematic diagram that Fig. 2 b realizes for a kind of Early media that the embodiment of the present invention two provides;
The method flow schematic diagram that Fig. 2 c realizes for a kind of Early media that the embodiment of the present invention two provides a part of again;
The some of the method flow schematic diagram that Fig. 3 a realizes for a kind of Early media that the embodiment of the present invention three provides;
Another part of the method flow schematic diagram that Fig. 3 b realizes for a kind of Early media that the embodiment of the present invention three provides;
The some of the method flow schematic diagram that Fig. 4 a realizes for a kind of Early media that the embodiment of the present invention four provides;
Another part of the method flow schematic diagram that Fig. 4 b realizes for a kind of Early media that the embodiment of the present invention four provides;
A kind of terminal structure schematic diagram that Fig. 5 provides for the embodiment of the present invention five;
Another terminal structure schematic diagram that Fig. 6 provides for the embodiment of the present invention five;
The P-CSCF structural representation that Fig. 7 provides for the embodiment of the present invention six;
Another P-CSCF structural representation that Fig. 8 provides for the embodiment of the present invention six;
A kind of MCID AS structural representation that Fig. 9 provides for the embodiment of the present invention seven;
Another MCID AS structural representation that Figure 10 provides for the embodiment of the present invention seven;
The MCID AS structural representation again that Figure 11 provides for the embodiment of the present invention seven;
The P-CSCF structural representation that Figure 12 provides for the embodiment of the present invention eight;
Another P-CSCF structural representation that Figure 13 provides for the embodiment of the present invention eight;
A kind of MRBT AS structural representation that Figure 14 provides for the embodiment of the present invention nine;
A kind of MGCF structural representation that Figure 15 provides for the embodiment of the present invention ten;
A kind of MGCF structural representation that Figure 16 provides for the embodiment of the present invention 11;
The system configuration schematic diagram that Figure 17 realizes for a kind of Early media that the embodiment of the present invention 12 provides;
The system configuration schematic diagram that Figure 18 realizes for a kind of Early media that the embodiment of the present invention 13 provides;
The system configuration schematic diagram that Figure 19 realizes for a kind of Early media that the embodiment of the present invention 14 provides.
Embodiment
The technical problem that the embodiment of the present invention will solve is to provide a kind of implementation method, device and system of Early media, can realize respectively network side reserving respectively Early media access-in resource and conversation media access-in resource.
Embodiment mono-, and as shown in Figure 1, the implementation method of a kind of Early media that the embodiment of the present invention provides, comprising:
Step 101: send call request to call conversation control function entity P-CSCF, above-mentioned call request comprises CRBT media session and describes agreement SDP and conversation media SDP;
In above-mentioned CRBT media SDP, comprise the Early media access information that calling terminal is supported, above-mentioned conversation media SDP comprises the conversation media access information that calling terminal is supported; Above-mentioned CRBT media, can be understood as all Early media that calling terminal supports such as other media before session connection is set up such as trouble back tone media, in subsequent embodiment, with the Early media of calling terminal support, take CRBT media as example, the Early media of terminal called support be take polychrome media and is described as example, above-mentioned CRBT media are the ring-back tone of playing for calling party of callee's customization, after the ring-back tone for callee's broadcasting that customizes for calling party of the polychrome media that will mention; In subsequent embodiment, repeat no more.
Step 102: receive the CRBT media access information that above-mentioned P-CSCF returns;
Step 103: set up being connected of CRBT media with network side according to above-mentioned CRBT media access information;
Step 104: receive the conversation media access information that above-mentioned P-CSCF returns;
After step 104, can set up the connection of conversation media, at this time can disconnect the connection of the above-mentioned CRBT media of setting up according to CRBT media access information, so in time releasing resource.
Step 105: set up being connected of conversation media with network side according to above-mentioned conversation media access information.
In above-mentioned execution mode, executive agent can be calling subscriber equipment (User Equipment, UE) or calling terminal; The conversation media SDP that adds CRBT media SDP and calling terminal to support in call request message, network side can distribute respectively CRBT media resource and conversation media resource according to the CRBT media SDP of caller support and conversation media SDP, has realized reserving respectively CRBT media resource and conversation media resource.So just avoided conversation media and the mutual interference of Early media phase, and then can guarantee good speech quality or save bandwidth resources.
Thought based on above-described embodiment one, the embodiment of the present invention also provides and under three kinds of environment, has realized the embodiment that Early media and conversation media are processed respectively, wherein in embodiment bis-to embodiment tetra-, the access information carrying in SDP after consulting is can be for the information of media access, therefore can be called media access information; Wherein SDP is carried out to service quality (Quality of Service, QoS authorizes and refers to reserved resource but do not connect, SDP execution QoS is ratified to refer to connect, SDP carries out QoS removing and refers to the connection that disconnection has been set up, to this explanation no longer one by one in each embodiment, refer to embodiment bis-to embodiment tetra-:
Embodiment bis-, as shown in Fig. 2 a, Fig. 2 b, Fig. 2 c, the present embodiment be take IMS as background, UE supports respectively CRBT, color image service, and P-CSCF supports respectively CRBT, color image service, and S-CSCF supports CRBT, color image service, multimedia calling identification server (Multimedia Caller Identification, MCID AS) support color image service, MRBT AS supports Ring Back Tone service, comprises the following steps:
Step 201: calling terminal UE initiates to invite (Invite) request, and (this Invite request is for calling out, can be called: call request), if calling UE is supported CRBT media, in Invite request, increase conversation media SDP and CRBT media SDP, calling UE sends Invite request to definite caller P-CSCF in registration process.
Step 202: caller P-CSCF can carry out respectively local policy inspection and network address transmission (Network Address Translation to conversation media SDP and CRBT media SDP, NAT) mapping transformation etc., caller P-CSCF sends Invite request to originating S-CSCF definite in registration process, and originating S-CSCF is triggered to caller MCID AS by Invite request.
Step 203:MCID AS judges the calling UE color image service of whether having contracted according to the CAMEL-Subscription-Information of calling UE, if, MCID AS sends Invite request to Media Resource Server (Media Resource Server, MRS), for obtaining the polychrome media SDP of MRS storage.
Step 204:MRS returns and asks successfully (200OK) message to MCID AS, and above-mentioned 200OK message is the response of the Invite request to receiving, and wherein comprises the polychrome media SDP of MRS storage.
Step 205:MCID AS is increased to the polychrome media SDP of MRS in the Invite request of calling UE initiation; in polychrome media SDP, increase the sign (for example a=mcid) of polychrome media simultaneously; MCID AS sends Invite request to originating S-CSCF, and Invite request is triggered to called MRBTAS by normal conversation flow process through terminating S-CSCF.
Step 206:MRBT AS sends Invite request to terminating S-CSCF, and terminating S-CSCF sends Invite request by normal conversation flow process to called P-CSCF.
Step 207: called P-CSCF, according to the sign identification polychrome media SDP of polychrome media, deletes CRBT media SDP.Conversation media SDP and polychrome media SDP are carried out respectively to local policy inspection and NAT mapping transformation etc., and called P-CSCF sends Invite request to called UE.
Step 208: called UE is held consultation respectively to conversation media SDP and polychrome media SDP, returns to session progress (183) message to called P-CSCF.Above-mentioned 183 message carry the negotiation result of conversation media SDP and polychrome media SDP.183 message are defined as in Session Initiation Protocol: session progress (SessionProgress) message, and for informing the progress of flow process.
Step 209: called P-CSCF refills and forbids CRBT media SDP, conversation media SDP and polychrome media SDP are carried out local policy inspection and NAT mapping transformation, conversation media SDP is carried out QoS mandate, polychrome media SDP is carried out to QoS approval etc., above-mentionedly polychrome media SDP is carried out to QoS approval also can after receiving ring (180) message, carry out, called P-CSCF returns to 183 message to MRTB AS.In Session Initiation Protocol, 180 message definitions are: ring (Ringing), and for representing called terminal ringing.
Step 210:MRBT AS judges the called UE Ring Back Tone service of whether having contracted according to the CAMEL-Subscription-Information of called UE, and if so, MRBT AS sends Invite request to MRS, for obtaining the CRBT media SDP of MRS storage.
Step 211:MRS returns to 200OK message to MRBT AS, comprises the CRBT media SDP of MRS storage in message.
Step 212:MRBT AS sends Temporary Response to MRS and confirms (ACKnowledgement, ACK) message, the CRBT media SDP preserving for obtaining MRS, and the CRBT media SDP of this preservation is CRBT media access information.
Step 213:MRBT AS is revised as by the CRBT media SDP in described session progress message the CRBT SDP that above-mentioned MRS preserves; MRBT AS returns to above-mentioned 183 message to terminating S-CSCF, and 183 message turn back to caller MCID AS by normal conversation flow process through originating S-CSCF.
Step 214:MCID AS sends ACK message to MRS.
Step 215: if there is polychrome media SDP, MCID AS deletes polychrome media SDP, returns to 183 message to originating S-CSCF, and originating S-CSCF returns to 183 message by normal conversation flow process to caller P-CSCF.
Step 216:P-CSCF carries out local policy inspection and NAT mapping transformation, conversation media SDP is carried out QoS mandate, CRBT media SDP is carried out to QoS approval etc. conversation media SDP and CRBT media SDP, and caller P-CSCF returns to 183 message to calling UE.Calling UE is reserved CRBT media resource after receiving 183 message.
Step 217～step 236: end-to-end negotiation and resource reservation that calling UE and called UE are carried out conversation media SDP by normal conversation flow process are confirmed.This process is no longer carried out the negotiation of CRBT media SDP or polychrome media SDP, MCIDAS and MRBTAS need not add the address of oneself to and record in route (Record-Route) header field in Invite request, and subsequent request and response will be without MCID AS and MRBTAS.If require subsequent message, carry out the negotiation of CRBT media SDP or polychrome media SDP simultaneously, MCID AS and MRBT AS confirm (PRovisional ACKnowledgement at Invite, Temporary Response, Prack) in request, the address of oneself can be added in Record-Route, Prack, renewal (Update), through MCID AS and MRBTAS, are carried out deletion, the increase of the similar Early media SDP of Invite flow process.MCID AS and MRBT AS not be used in Update request the address of oneself are added in route record (Record-Route), the Bye message process while avoiding conversation end.
Step 237: called UE ring, to called P-CSCF, return to 180 response messages.
Step 238: called P-CSCF returns to 180 response messages to MRBTAS.
Step 239:MRBT AS sends information Inf/200 notice MRS and starts coloring ring back tone playing.
Step 240:MRBT AS returns to 180 response messages to terminating S-CSCF, and 180 response messages turn back to caller MCID AS by normal conversation flow process through originating S-CSCF.
Step 241:MCID AS sends information Inf/200 notice MRS and starts to play polychrome.
Step 242, MCID AS return to 180 response messages to originating S-CSCF, and originating S-CSCF returns to 180 response messages by normal conversation flow process to caller P-CSCF.
Step 243: caller P-CSCF returns to 180 response messages to calling UE.
Step 244: calling UE and called UE confirm that by Temporary Response (provisional ACK, Prack) message carries out the end-to-end confirmation of Temporary Response by normal conversation flow process.
Step 245, called UE off-hook, send 200OK message, and be released to the resource of polychrome media application, and concrete delivery mode can be: disconnect according to polychrome media access information and being connected that network side is set up; Then to called P-CSCF, return to 200OK message.
Step 246: called P-CSCF carries out QoS approval, polychrome media SDP is carried out to QoS removing etc. conversation media SDP, and called P-CSCF returns to 200OK message to MRTB AS.
Step 247:MRBT AS sends and disconnects (Bye/200) message informing MRS stop playing coloring ring back tone.
Step 248:MRBT AS returns to 200OK message to terminating S-CSCF, and 200OK message turns back to caller MCID AS by normal conversation flow process through originating S-CSCF.
Step 249:MCID AS sends disconnection (Bye/200) message informing MRS and stops playing polychrome.
Step 250:MCID AS returns to 200OK message to originating S-CSCF, and originating S-CSCF returns to 200OK message by normal conversation flow process to caller P-CSCF.
Step 251: caller P-CSCF carries out QoS approval, CRBT media SDP is carried out to QoS removing etc. conversation media SDP, and caller P-CSCF returns to 200OK message to calling UE.
Step 252: calling UE is released to the resource of CRBT media application, concrete delivery mode can be: disconnect being connected according to the CRBT media of CRBT media access information and network side foundation.。
If session flow process cross operator, can be by interconnected boundary Control functional entity (1nterconnection Border Control Function between operator, IBCF) intercommunication, IBCF can carry out respectively local policy inspection, NAT mapping and QoS to conversation media SDP, CRBT media SDP, polychrome media SDP and process.
Particularly, the implementation of above-mentioned IBCF can be: receive Invite message; The conversation media SDP of above-mentioned Invite message and Early media SDP carry out respectively local policy inspection and/or NAT mapping; Send Invite message; Receive 183 message; Receive after 183 message, conversation media SDP is carried out to QoS and authorize, CRBT media SDP is carried out to QoS approval.
Can also comprise: receive the 200OK message corresponding with Invite; Receive after above-mentioned 200OK message to, conversation media SDP is carried out QoS approval, polychrome media SDP is carried out to QoS removing.
By said method, can under the scene of cross operator, realize Early media.
Embodiment tri-, as shown in Figure 3 a, 3 b, be that with embodiment bis-differences the present embodiment comprises MGCF entity (Media Gateway Control Function, MGCF), support circuit-switched (circuit switching, CS) territory Ring Back Tone service, can comprise the following steps:
Step 301: calling UE is initiated Invite request and (or is called: call request), if calling UE is supported CRBT media, in request, increase conversation media SDP and CRBT media SDP, calling UE sends Invite request to caller P-CSCF definite in registration process.
Step 302: caller P-CSCF can carry out respectively local policy inspection and NAT mapping transformation etc. to conversation media SDP and CRBT media SDP, caller P-CSCF sends Invite request to originating S-CSCF definite in registration process, and originating S-CSCF is triggered to caller MCID AS by Invite request.
Step 303:MCID AS judges the calling UE color image service of whether having contracted according to the CAMEL-Subscription-Information of calling UE, and if so, MCID AS sends Invite request to MRS, for obtaining the polychrome media SDP of MRS storage.
Step 304:MRS returns to 200OK message to MCID AS, comprises the polychrome media SDP of MRS storage in above-mentioned 200OK message.
Step 305:MCID AS is increased to the polychrome media SDP of MRS storage in the Invite of calling UE initiation; in polychrome media SDP, increase the sign (for example a=mcid) of polychrome media simultaneously; MCID AS sends Invite request to originating S-CSCF; Invite request is routed to called MGCF entity (Media Gateway Control Function, MGCF) by normal conversation flow process through BGCF.
Step 306:MGCF forbids polychrome media SDP (in SDP agreement can be: the capable port of m is set to 0); to Calling Side, return to 183 (session progress Session Progress) message, 183 message turn back to caller MCID AS by normal conversation flow process through originating S-CSCF.
Step 307:MCID AS learns and has forbidden polychrome media SDP, the connection of notice MRS disconnection polychrome media.
Step 308: if there is polychrome media SDP, MCID AS deletes polychrome media SDP, returns to 183 message to originating S-CSCF, and originating S-CSCF returns to 183 message by normal conversation flow process to caller P-CSCF.
Step 309:P-CSCF carries out local policy inspection and NAT mapping transformation, conversation media SDP is carried out QoS mandate, CRBT media SDP is carried out to QoS approval etc. conversation media SDP and CRBT media SDP, and caller P-CSCF returns to 183 message to calling UE.Calling UE is reserved CRBT media resource after receiving 183 message.
Step 310～step 322: end-to-end negotiation and resource reservation that calling UE and called UE are carried out conversation media SDP by normal conversation flow process are confirmed.This process is no longer carried out the negotiation of CRBT media SDP or conversation media SDP, MCID AS and MRBT AS need not add the address of oneself to and record in route (Record-Route) header field in Invite request, and subsequent request and response will be without MCID AS and MRBTAS.If require subsequent message, carry out the negotiation of CRBT media SDP or conversation media SDP simultaneously, MCID AS and MRBT AS can add the address of oneself in Record-Route in Invite, Prack request, so that Prack, Update, through MCID AS and MRBT AS, carry out deletion, the increase of the similar Early media SDP of Invite flow process.MCID AS and MRBT AS not be used in Update request the address of oneself are added in Record-Route, the Bye process while avoiding conversation end.
Step 319: the success of calling UE resource reservation, MGCF sends initial address message (Initial AddressMessage, IAM) message to called gateway MSC (Gateway Mobile Switch Center, GMSC).
Step 323:GMSC sends and upgrades (Setup) message to called UE.
Step 324: called UE ring, to GMSC, return to ring (Alerting) message.
Step 325:GMSC sends IAM message to MRS, and notice MRS starts coloring ring back tone playing.
Step 326:MRS coloring ring back tone playing, to the full message in GMSC return address (Address CompleteMessage, ACM) message.
A series of processing of step 327:GMSC executive circuit territory CRBT, return to ACM message to MGCF.
Step 328:MGCF indication mobile media gateway (Mobile Media Gateway; MGW) set up being connected of called media and CRBT service provided to the calling party media; to Calling Side, return to 180 response messages, 180 response messages turn back to caller MCID AS by normal conversation flow process through originating S-CSCF.
Step 329:MCID AS returns to 180 response messages to originating S-CSCF, and originating S-CSCF returns to 180 response messages by normal conversation flow process to caller P-CSCF.
Step 330: caller P-CSCF returns to 180 response messages to calling UE.
Step 331: calling UE and MGCF carry out the end-to-end confirmation of Temporary Response by normal conversation flow process by Temporary Response message authentication (provisional ACK, Prack) message.
Step 332: called UE off-hook, returns to connection (Connect) message to GMSC.
Step 333:GMSC sends a reply (REL) message to MRS, notice MRS stop playing coloring ring back tone.
Step 334:MRS returns to Release complete (release complete, RLC) message to GMSC.
A series of processing of step 335:GMSC executive circuit territory CRBT, return to response message (ANswer Message, ANM) message to MGCF.
Step 336:MGCF indication MGW sets up being connected of called media and caller conversation media, to Calling Side, returns to 200OK message, and 200OK message is passed through originating S-CSCF according to normal conversation flow process and turned back to caller MCID AS.
Step 337:MCID AS returns to 200OK message to originating S-CSCF, and originating S-CSCF returns to 200OK message by normal conversation flow process to caller P-CSCF.
Step 338: caller P-CSCF carries out QoS approval, CRBT media SDP is carried out to QoS removing etc. conversation media SDP, and caller P-CSCF returns to 200OK message to calling UE.
Step 339: calling UE is released to the resource of CRBT media application, concrete delivery mode can be: disconnect being connected according to the CRBT media of CRBT media access information and network side foundation.
Embodiment tetra-, as shown in Fig. 4 a, Fig. 4 b, different from embodiment tri-: MGCF support circuit-switched in embodiment tri-(circuit switching, CS) territory Ring Back Tone service, in the present embodiment, MGCF supports IMS territory Ring Back Tone service.Comprise the following steps:
Step 401, calling UE send initiates (Setup) request, and request is routed to GMSC by the signaling process of circuit domain.
Step 402, GMSC initiate IAM message by normal conversation flow process to MGCF.
Step 403, MGCF (or are called: call request) in message, increase conversation media SDP and CRBT media SDP in Invite request; to I-CSCF, initiate Invite request, Invite request is triggered to called MRBT AS by normal conversation flow process through terminating S-CSCF.
The Invite that step 404, MRBT AS have increased polychrome media SDP to terminating S-CSCF transmission by MRBT AS asks, and terminating S-CSCF sends Invite request by normal conversation flow process to called P-CSCF.
Step 405, called P-CSCF delete CRBT media SDP, and conversation media SDP and polychrome media SDP are carried out respectively to local policy inspection and NAT mapping transformation etc., and called P-CSCF sends Invite request to called UE.
Step 406, called UE are held consultation respectively to conversation media SDP and polychrome media SDP, to called P-CSCF, return to 183 message.
Step 407, called P-CSCF carry out local policy inspection and NAT mapping transformation, conversation media SDP are carried out QoS mandate, polychrome media SDP is carried out to QoS approval etc. conversation media SDP and polychrome media SDP, and called P-CSCF returns to 183 message to MRTB AS.
Step 408, MRBT AS judge the called UE Ring Back Tone service of whether having contracted according to the CAMEL-Subscription-Information of called UE, and if so, MRBT AS sends Invite request to MRS, for obtaining the CRBT media SDP of MRS storage.
Step 409, MRS return to 200OK message to MRBT AS, comprise the CRBT media SDP of MRS storage in message, and these CRBT media SDP is CRBT media access information.
Step 410, MRBT AS send ACK message to MRS, for confirming that 200OK message receives.
Step 411, MRBT AS revise the CRBT media SDP in 183 message according to the CRBT media SDP of MRS, and MRBT AS returns to 183 message to terminating S-CSCF, and 183 message turn back to MGCF by normal conversation flow process through I-CSCF.Caller MGCF reserves CRBT media resource after receiving 183 message.
Step 412～step 423, MGCF represent that end-to-end negotiation and resource reservation that calling UE and called UE are carried out conversation media SDP by normal conversation flow process confirm.This process is no longer carried out the negotiation of CRBT media SDP or polychrome media SDP, MCID AS and MRBT AS need not add the address of oneself to and record in route (Record-Route) header field in Invite request, and subsequent request and response will be without MCIDAS and MRBT AS.If require subsequent message, carry out the negotiation of CRBT media SDP or polychrome media SDP simultaneously, MCID AS and MRBT AS can add the address of oneself in Record-Route in Invite, Prack request, so that Prack, Update, through MCID AS and MRBT AS, carry out deletion, the increase of the similar Early media SDP of Invite flow process.MCID AS and MRBT AS not be used in Update request the address of oneself are added in Record-Route, the Bye process while avoiding conversation end.
Step 424, called UE ring, return to 180 response messages to called P-CSCF.
Step 425, called P-CSCF return to 180 response messages to MRBT AS.
Step 426, MRBT AS send information Inf/200 notice MRS and start coloring ring back tone playing.
Step 427, MRBT AS return to 180 response messages to terminating S-CSCF, and 180 response messages turn back to MGCF by normal conversation flow process through I-CSCF.
Step 428, MGCF return to ACM message by normal conversation flow process to GMSC.
Step 429, GMSC return to Alerting message by the signaling process of circuit domain to calling UE.
Step 430, MGCF represent that calling UE and called UE confirm that by Temporary Response (provisional ACK, Prack) message carries out the end-to-end confirmation of Temporary Response by normal conversation flow process.
Step 431, called UE off-hook, send 200OK message, and be released to the resource of polychrome media application, and concrete delivery mode can be: disconnect according to polychrome media access information and being connected that network side is set up; Then to called P-CSCF, return to 200OK message.
Step 432, called P-CSCF carry out QoS approval, polychrome media SDP are carried out to QoS removing etc. conversation media SDP, and called P-CSCF returns to 200OK message to MRTB AS.
Step 433, MRBT AS send information Inf/200 notice MRS stop playing coloring ring back tone.
Step 434, MRBT AS return to 200OK message to terminating S-CSCF, and 200OK message turns back to MGCF by normal conversation flow process through I-CSCF.
Step 435, MGCF indication MGW connect caller media and called conversation media, by normal conversation flow process, to GMSC, return to ANM.
Step 436, GMSC return to Connect message by the signaling process of circuit domain to calling UE.
The conversation media SDP that adds CRBT media SDP and calling terminal to support in Invite message, network side can distribute respectively CRBT media resource and conversation media resource according to the CRBT media SDP of caller support and conversation media SDP, has realized reserving respectively CRBT media resource and conversation media resource.So just avoided conversation media and the mutual interference of Early media phase, and then can guarantee good speech quality or save bandwidth resources.In addition, the media bandwidth in the time of may being less than call due to the media bandwidth of ring-back tone, if increase bandwidth failure, will there will be call media bandwidth deficiency, cause speech quality poor; Above-described embodiment is separated by Early media and conversation media, can distribute respectively two kinds of media resources, so just makes conversation media and Early media all sufficient, thereby guarantees good speech quality.
Embodiment five, and as shown in Figure 5, the embodiment of the present invention provides a kind of terminal, comprising:
Receiving element 502, the CRBT media access information returning for receiving above-mentioned P-CSCF; Receive the conversation media access information that above-mentioned P-CSCF returns;
Connect and set up unit 503, for setting up being connected of CRBT media according to above-mentioned CRBT media access information with network side; According to above-mentioned conversation media access information, set up being connected of conversation media with network side.
Further, as shown in Figure 6, above-mentioned terminal, also comprises:
Embodiment six, and as shown in Figure 7, the embodiment of the present invention also provides a kind of proxy call conversation control function entity P-CSCF, comprising:
Transmitting element 702, for sending above-mentioned call request to obtain CRBT media access information and conversation media access information to multimedia calling identification server MCID AS;
Connect and set up unit 704, for the connection of setting up CRBT media according to above-mentioned CRBT media access information; According to above-mentioned conversation media access information, setting up conversation media connects.
Further, as shown in Figure 8, above-mentioned P-CSCF, also comprises:
Control unit 801, for disconnecting the connection of the above-mentioned CRBT media of setting up according to CRBT media access information.
Embodiment seven, and as shown in Figure 9, the embodiment of the present invention also provides a kind of multimedia calling identification server MCID AS, comprising:
Judging unit 902, for judging the above-mentioned calling terminal polychrome media business of whether having contracted according to above-mentioned call request;
Adding device 903 while for judgment result is that at judging unit 902 being, adds polychrome media SDP in above-mentioned call request;
Further, as shown in figure 10, above-mentioned MCID AS, also comprises:
Further, as shown in figure 11, above-mentioned MCID AS, also comprises:
Embodiment eight, and as shown in figure 12, the embodiment of the present invention also provides a kind of P-CSCF, comprising:
Further, as shown in figure 13, above-mentioned P-CSCF, also comprises:
Embodiment nine, and as shown in figure 14, the embodiment of the present invention also provides a kind of Multimedia Ringback Tone Server server (Multimedia Ring Back Tone AS, MRBT AS), comprising:
Judging unit 1402, for judging the above-mentioned terminal called Ring Back Tone service of whether having contracted according to the CAMEL-Subscription-Information of terminal called;
Revise unit 1404, use and the CRBT media SDP in above-mentioned session progress message is revised as to above-mentioned CRBT media access information.
Embodiment ten, and as shown in figure 15, the embodiment of the present invention also provides a kind of MGCF entity MGCF, comprising:
Embodiment 11, and as shown in figure 16, the embodiment of the present invention also provides a kind of MGCF entity MGCF, comprising:
Embodiment 12, and as shown in figure 17, the embodiment of the present invention also provides a kind of system that realizes of Early media, comprising: caller P-CSCF (1701), MCID AS (1702), MRBT AS (1703), called P-CSCF (1704);
Caller P-CSCF (1701), the call request sending for receiving calling terminal, above-mentioned call request comprises CRBT media SDP and conversation media SDP; To multimedia calling identification server MCID AS (1702), send above-mentioned call request to obtain CRBT media access information and conversation media access information; Receive the session progress message that MCIDAS (1702) returns according to above-mentioned call request, above-mentioned session progress message comprises CRBT media access information and conversation media access information; The connection of setting up CRBT media according to above-mentioned CRBT media access information; According to above-mentioned conversation media access information, setting up conversation media connects;
MCID AS (1702), the call request sending for receiving caller P-CSCF (1701), above-mentioned call request comprises conversation media SDP and CRBT media SDP; According to above-mentioned call request, judge the above-mentioned calling terminal polychrome media business of whether having contracted; If so, in above-mentioned call request, add polychrome media SDP; To MRBT AS (1703), send the above-mentioned call request that adds polychrome media SDP; Receive the session progress message that MRBT AS (1703) sends, above-mentioned session progress message comprises CRBT media access information, polychrome media access information and conversation media access information, the connection that above-mentioned CRBT media access information, polychrome media access information and conversation media access information are respectively used to set up CRBT media, polychrome media and conversation media; Delete the polychrome media access information in above-mentioned session progress message; To caller P-CSCF (1701), send the session progress message of above-mentioned modification to set up the connection of CRBT media and conversation media;
Called P-CSCF (1704), for receipt of call request, above-mentioned call request comprises polychrome media SDP, CRBT media SDP and conversation media SDP; Delete above-mentioned CRBT media SDP, the call request of above-mentioned modification is sent to terminal called; Receive the session progress message that above-mentioned terminal called returns, above-mentioned session progress message comprises polychrome media access information and conversation media access information; In the above-mentioned session progress message of returning, refill and forbid above-mentioned CRBT media SDP; To MRBT AS (1703), send amended session progress message, so that MRBT AS (1703) obtains CRBT media access information, the connection of above-mentioned CRBT media access information for setting up CRBT media; The connection of above-mentioned conversation media access information for setting up conversation media;
MRBT AS (1703), for receiving the call request message of MCID AS (1702) transmission and being transmitted to called P-CSCF (1704); Receive the session progress message that called P-CSCF (1704) sends, above-mentioned session progress message comprises conversation media access information and CRBT media SDP; According to the CAMEL-Subscription-Information of terminal called, judge the above-mentioned terminal called Ring Back Tone service of whether having contracted, if, to MRS, send above-mentioned session progress message and obtain CRBT media access information, and the CRBT media SDP in above-mentioned session progress message is revised as to above-mentioned CRBT media access information; The session progress message of revising to caller P-CSCF (1701) transmission is to set up respectively the connection of CRBT media and the connection of conversation media.
Embodiment 13, and as shown in figure 18, the embodiment of the present invention also provides a kind of system that realizes of Early media, comprising: caller P-CSCF (1803), MCID AS (1801), MGCF (1802);
Wherein, MCID AS (1801), for receiving from the call request of calling terminal and sending to MGCF (1802); Receive session progress message; If contain polychrome media SDP in above-mentioned session progress message, delete polychrome media SDP, to caller P-CSCF (1803), send the session progress message of revising;
MGCF (1802), the call request sending for receiving MCID AS (1801), above-mentioned call request comprises CRBT media SDP and conversation media SDP; According to above-mentioned call request, to MCID AS (1801), send session progress message, so that obtain CRBT media access information and conversation media access information;
Caller P-CSCF (1803), for receiving after the session progress message of MCID AS (1801) transmission, the connection of setting up CRBT media according to above-mentioned CRBT media access information, the connection of setting up conversation media according to above-mentioned conversation media access information.
Embodiment 14, and as shown in figure 19, the embodiment of the present invention also provides a kind of system that realizes of Early media, comprising: MGCF (1901), called P-CSCF (1902), MRBT AS (1903); Wherein,
MGCF (1901), for receipt of call request, adds above-mentioned call request by conversation media SDP and CRBT media SDP; To MRBTAS (1903), send above-mentioned amended call request; Receive the session progress message that MRBTAS returns, according to the connection of setting up respectively CRBT media of CRBT media access information in session progress message and conversation media access information and the connection of conversation media;
MRBT AS (1903), for sending to called P-CSCF (1902) by above-mentioned amended call request; Receive the session progress message that called P-CSCF (1902) sends, above-mentioned session progress message comprises conversation media access information and CRBT media SDP; According to the CAMEL-Subscription-Information of terminal called, judge the above-mentioned terminal called Ring Back Tone service of whether having contracted, if, to MRS, send above-mentioned session progress message and obtain CRBT media access information, and the CRBT media SDP in above-mentioned session progress message is revised as to above-mentioned CRBT media access information; The session progress message of revising to MGCF (1901) transmission is to set up respectively the connection of CRBT media and the connection of conversation media;
Called P-CSCF (1902), for receiving above-mentioned amended call request, above-mentioned call request comprises polychrome media SDP, CRBT media SDP and conversation media SDP; Delete above-mentioned CRBT media SDP, the call request of above-mentioned modification is sent to terminal called; Receive the session progress message that above-mentioned terminal called returns, above-mentioned session progress message comprises polychrome media access information and conversation media access information; In the above-mentioned session progress message of returning, refill and forbid above-mentioned CRBT media SDP; To MRBT AS (1903), send amended session progress message, so that MRBT AS (1903) obtains CRBT media access information.
Above embodiment five to embodiment 13, the conversation media SDP that adds CRBT media SDP and calling terminal to support in call request message, network side can distribute respectively CRBT media resource and conversation media resource according to the CRBT media SDP of caller support and conversation media SDP, has realized reserving respectively CRBT media resource and conversation media resource.So just avoided conversation media and the mutual interference of Early media phase, and then can guarantee good speech quality or save bandwidth resources.
One of ordinary skill in the art will appreciate that all or part of step realizing in above-described embodiment method is to come the hardware that instruction is relevant to complete by program, its program can be stored in a kind of computer-readable recording medium, and the above-mentioned storage medium of mentioning can be in the storage medium of interior known any other form of memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field.
The implementation method of a kind of the Early media above embodiment of the present invention being provided, device and system are described in detail, applied specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; , for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention meanwhile.
Claims (22)
1. an implementation method for Early media, is characterized in that, comprising:
To call conversation control function entity P-CSCF, send call request, described call request comprises CRBT media session and describes agreement SDP and conversation media SDP;
Receive the CRBT media access information that described P-CSCF returns;
According to described CRBT media access information, set up being connected of CRBT media with network side;
Receive the conversation media access information that described P-CSCF returns;
According to described conversation media access information, set up being connected of conversation media with network side.
2. method according to claim 1, is characterized in that, also comprises:
Disconnect being connected of the described CRBT media of setting up with network side according to CRBT media access information.
3. an implementation method for Early media, is characterized in that, comprising:
Receive the call request that calling terminal sends, described call request comprises CRBT media SDP and conversation media SDP;
To multimedia calling identification server MCID AS, send described call request to obtain CRBT media access information and conversation media access information;
Receive the session progress message that MCID AS returns according to described call request, described session progress message comprises CRBT media access information and conversation media access information;
The connection of setting up CRBT media according to described CRBT media access information; According to described conversation media access information, setting up conversation media connects.
4. method according to claim 3, is characterized in that, also comprises:
Disconnect the connection of the described CRBT media of setting up according to CRBT media access information.
5. an implementation method for Early media, is characterized in that, comprising:
Reception is from the call request of calling terminal, and described call request comprises conversation media SDP and CRBT media SDP;
According to described call request, judge the described calling terminal polychrome media business of whether having contracted;
If so, in described call request, add polychrome media SDP;
The call request that adds polychrome media SDP described in sending to MRBT AS;
Receive the session progress message that MRBT AS sends, described session progress message comprises CRBT media access information, polychrome media access information and conversation media access information, the connection that described CRBT media access information, polychrome media access information and conversation media access information are respectively used to set up CRBT media, polychrome media and conversation media.
6. method according to claim 5, is characterized in that, also comprises:
Delete the polychrome media access information in described session progress message;
The session progress message of having deleted polychrome media access informations to P-CSCF transmission is to set up the connection of CRBT media and conversation media.
7. an implementation method for Early media, is characterized in that, comprising:
Receipt of call request, described call request comprises polychrome media SDP, CRBT media SDP and conversation media SDP;
Delete described CRBT media SDP, the call request of having deleted CRBT media SDP is sent to terminal called;
Receive the session progress message that described terminal called returns, described session progress message comprises polychrome media access information and conversation media access information; In the described session progress message of returning, refill and forbid described CRBT media SDP;
To MRBT AS, send amended session progress message, so that MRBT AS obtains CRBT media access information, the connection of described CRBT media access information for setting up CRBT media.
8. method according to claim 7, is characterized in that, described in also comprise after receiving the request success message corresponding with described call request:
Disconnect the connection of the described polychrome media of setting up according to polychrome media access information.
9. an implementation method for Early media, is characterized in that, comprising:
Receive the session progress message that called end P-CSCF sends, described session progress message comprises conversation media access information and CRBT media SDP;
According to the CAMEL-Subscription-Information of terminal called, judge the described terminal called Ring Back Tone service of whether having contracted, if, to MRS, send described session progress message and obtain CRBT media access information, and the CRBT media SDP in described session progress message is revised as to described CRBT media access information;
The session progress message of revising to calling terminal P-CSCF transmission is to set up respectively the connection of CRBT media and the connection of conversation media.
10. an implementation method for Early media, is characterized in that, comprising:
Receive the call request that MCID AS sends, described call request comprises CRBT media SDP and conversation media SDP;
According to described call request, to MCID AS, send session progress message, so that obtain CRBT media access information and conversation media access information, the connection of described CRBT media access information for setting up CRBT media, the connection of described conversation media access information for setting up conversation media.
The implementation method of 11. 1 kinds of Early media, is characterized in that, comprising:
Receipt of call request, adds described call request by conversation media SDP and CRBT media SDP;
To MRBT AS, send the call request that has added conversation media SDP and CRBT media SDP, to obtain CRBT media access information and conversation media access information, the connection of described CRBT media access information for setting up CRBT media, the connection of described conversation media access information for setting up conversation media.
12. 1 kinds of terminals, is characterized in that, comprising:
Request transmitting unit, for sending call request to call conversation control function entity P-CSCF, described call request comprises CRBT media session and describes agreement SDP and conversation media SDP;
Receiving element, the CRBT media access information and the conversation media access information that for receiving described P-CSCF, return;
Connect and set up unit, for setting up being connected of CRBT media according to described CRBT media access information with network side; According to described conversation media access information, set up being connected of conversation media with network side.
13. according to terminal described in claim 12, it is characterized in that, also comprises:
Control unit, for disconnecting being connected of the described CRBT media of setting up with network side according to CRBT media access information.
14. 1 kinds of proxy call conversation control function entity P-CSCF, is characterized in that, comprising:
Request reception unit, the call request sending for receiving calling terminal, described call request comprises CRBT media SDP and conversation media SDP;
Transmitting element, for sending described call request to obtain CRBT media access information and conversation media access information to multimedia calling identification server MCID AS;
Response receiving element, the session progress message of returning according to described call request for receiving MCID AS, described session progress message comprises CRBT media access information and conversation media access information;
Connect and set up unit, for the connection of setting up CRBT media according to described CRBT media access information; According to described conversation media access information, setting up conversation media connects.
15. according to P-CSCF described in claim 14, it is characterized in that, also comprises:
Control unit, for disconnecting the connection of the described CRBT media of setting up according to CRBT media access information.
16. 1 kinds of multimedia calling identification server MCID AS, is characterized in that, comprising:
Request reception unit, for receiving the call request from calling terminal, described call request comprises conversation media SDP and CRBT media SDP;
Judging unit, for judging the described calling terminal polychrome media business of whether having contracted according to described call request;
Adding device while for judgment result is that at judging unit being, adds polychrome media SDP in described call request;
Request transmitting unit, for the call request to adding polychrome media SDP described in MRBT AS transmission;
Progress receiving element, the session progress message sending for receiving MRBT AS, described session progress message comprises CRBT media access information, polychrome media access information and conversation media access information, the connection that described CRBT media access information, polychrome media access information and conversation media access information are respectively used to set up CRBT media, polychrome media and conversation media.
17. according to MCID AS described in claim 16, it is characterized in that, also comprises:
Delete cells, deletes the polychrome media access information in described session progress message;
Progress transmitting element, for to P-CSCF, send deleted polychrome media access informations session progress message to set up the connection of CRBT media and conversation media.
18. 1 kinds of P-CSCF, is characterized in that, comprising:
Request reception unit, for receipt of call request, described call request comprises polychrome media SDP, CRBT media SDP and conversation media SDP;
Delete cells, for deleting described CRBT media SDP;
Request transmitting unit, sends to terminal called by having deleted CRBT media SDP call request;
Progress receiving element, the session progress message of returning for receiving described terminal called, described session progress message comprises polychrome media access information and conversation media access information;
Information control unit, for refilling in the described session progress message of returning and forbidding described CRBT media SDP;
Progress transmitting element, for sending amended session progress message, so that MRBT AS obtains CRBT media access information to MRBT AS.
19. according to P-CSCF described in claim 18, it is characterized in that, also comprises:
Control unit, for disconnecting the connection of the described polychrome media of setting up according to polychrome media access information.
20. 1 kinds of Multimedia Ringback Tone Server MRBT AS, is characterized in that, comprising:
Progress receiving element, the session progress message sending for receiving called end P-CSCF, described session progress message comprises conversation media access information and CRBT media SDP;
Judging unit, for judging the described terminal called Ring Back Tone service of whether having contracted according to the CAMEL-Subscription-Information of terminal called;
Progress transmitting element, judgment result is that for judging unit to be, to MRS, sends described session progress message and obtains CRBT media access information; The session progress message of revising to calling terminal P-CSCF transmission is to set up respectively the connection of CRBT media and the connection of conversation media;
Revise unit, for the CRBT media SDP of described session progress message is revised as to described CRBT media access information.
21. 1 kinds of MGCF entity MGCF, is characterized in that, comprising:
Request reception unit, the call request sending for receiving MCID AS, described call request comprises CRBT media SDP and conversation media SDP;
Progress transmitting element, for sending session progress message according to described call request to MCID AS, so that obtain CRBT media access information and conversation media access information, the connection of described CRBT media access information for setting up CRBT media, the connection of described conversation media access information for setting up conversation media.
22. 1 kinds of MGCF entity MGCF, is characterized in that, comprising:
Request reception unit, for receipt of call request;
Information adding device, for adding described call request by conversation media SDP and CRBT media SDP;
Request transmitting unit, for send the call request that has added conversation media SDP and CRBT media SDP to MRBT AS, to obtain CRBT media access information and conversation media access information, the connection of described CRBT media access information for setting up CRBT media, the connection of described conversation media access information for setting up conversation media.
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| CN102111386A (en) | 2011-06-29 |
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