CN101317431B - Multimedia ringtone platform, method and system for realizing multimedia color ring back tone service - Google Patents

Multimedia ringtone platform, method and system for realizing multimedia color ring back tone service Download PDF

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Publication number
CN101317431B
CN101317431B CN2007800002895A CN200780000289A CN101317431B CN 101317431 B CN101317431 B CN 101317431B CN 2007800002895 A CN2007800002895 A CN 2007800002895A CN 200780000289 A CN200780000289 A CN 200780000289A CN 101317431 B CN101317431 B CN 101317431B
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terminal
calling
back tone
ring back
calling terminal
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CN101317431A (en
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成义华
胡小清
郑亦初
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority claimed from CNB2006101114024A external-priority patent/CN100450003C/en
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Priority claimed from PCT/CN2007/000737 external-priority patent/WO2007104241A1/en
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Abstract

A multimedia ring back tone(MRBT) platform, terminal, and a system for realizing the multimedia ring back tone service are disclosed. A method for realizing the multimedia ring back tone service is also disclosed, the originating terminal originates a call to the visited terminal, and before the call is switched on, the multimedia ring back tone platform MRBT carries out the first media capability negotiation with the originating terminal; the MRBT plays the multimedia ring back tone to the originating terminal according to the result of the multimedia capability negotiation. The technical solutions of the present invention can apply the multimedia ring back tone service to the 3G communication network.

Description

The system and method for multimedia audible ringing tone platform, realization Multimedia Ring Back Tone service
Technical field
The present invention relates in the third generation (3G) communication network, realize the scheme of audible ringing tone service, particularly the system and method for multimedia audible ringing tone platform, realization Multimedia Ring Back Tone service.
Background of invention
So-called ring-back tone is meant that calling terminal calls out in the process of terminal called, by the sound that communication system network is play to calling terminal, normally one section of early stage ring-back tone " too " the bell sound.And Ring Back Tone service is meant, when calling terminal is called out terminal called, in the process of the success of paging terminal called, dialed terminal bell, calling terminal is heard no longer be system default " too " ring-back tone of type, but by terminal called, calling terminal or the third party ring-back tone of customization in advance.This ring-back tone can be music, song or voice etc.Ring Back Tone service not only can be applied to mobile communications network, also can be applied to fixed communication network.
Along with the construction of 3-G (Generation Three mobile communication system) edition 4 (3G R4), 3G R5 and next generation network (NGN), communication network can be supported multimedia service, and Ring Back Tone service also expands to Multimedia Ring Back Tone service thereupon.Multimedia Ring Back Tone service is meant, when calling terminal is called out terminal called, in the process of the success of paging terminal called, dialed terminal bell, calling terminal can receive and play the content of multimedia that is customized in advance by terminal called, calling terminal or third party, comprises video and audio frequency.Relative, original Ring Back Tone service is called the speech Ring Back Tone service.Because the realization of Multimedia Ring Back Tone service is more more complicated than speech Ring Back Tone service, the system of existing speech Ring Back Tone service can't directly be used for realizing Multimedia Ring Back Tone service.
Summary of the invention
In view of this, the embodiment of the invention provides the method and system of multimedia audible ringing tone platform, realization Multimedia Ring Back Tone service.Described method comprises the steps:
Calling terminal is before terminal called initiates a call to described call through, and multimedia audible ringing tone MRBT platform and calling terminal carry out the media capability negotiation first time;
The MRBT platform is set up the link from the MRBT platform to calling terminal, to calling terminal play multimedia CRBT according to the result of described media capability negotiation; Behind the terminal called answering call, the MRBT platform carries out the second time media capability negotiation relevant with terminal called, the MRBT platform is set up the link of terminal called to the MRBT platform, and with the speech channel of the calling and called terminal that connects, the speech channel that the calling and called terminal is passed through to be set up is conversed.
The MRBT platform that the embodiment of the invention proposes comprises: the first capability negotiation module is used for carrying out media capability negotiation with calling terminal notice Ring Back Tone service module after consulting to finish;
The Ring Back Tone service module is used to obtain multimedia color ring back tone, and after the notice of receiving the first capability negotiation module, plays described multimedia color ring back tone to calling terminal;
The second capability negotiation module is used for carrying out media capability negotiation with terminal called, consults back notice link and sets up module;
Module is set up in link, is used for carrying out alternately with O-MSC, sets up linking between MRBT platform and the calling terminal; Be used to set up linking of MRBT platform and terminal called.
The system of the realization Multimedia Ring Back Tone service that the embodiment of the invention proposes comprises O-MSC, T-MSC and MRBT platform, wherein,
Described O-MSC is used for calling out terminal called by T-MSC, and sending the Multimedia Ring Back Tone service request to the MRBT platform after the request that receives calling terminal calling terminal called;
Described MRBT platform carries out the media capability negotiation first time with calling terminal after being used to receive Multimedia Ring Back Tone service request from O-MSC, and behind described media capability negotiation to calling terminal play multimedia CRBT; Described MRBT platform comprises the second media capability negotiation module, is used for carrying out media capability negotiation with terminal called; Described MRBT platform is set up the link of terminal called to the MRBT platform, and with the speech channel of the calling and called terminal that connects, the speech channel that the calling and called terminal is passed through to be set up is conversed.
As can be seen from the above technical solutions, before calling terminal calling terminal called is replied to terminal called, after MRBT platform and calling terminal carry out media capability negotiation, foundation via the communication link of MGW to calling terminal, sends to calling terminal with the multimedia color ring back tone of storing in advance by this communication link from the MRBT platform.Therefore, the system and method that provides of the embodiment of the invention can be realized Multimedia Ring Back Tone service in the 3G communication network.
Brief Description Of Drawings
Fig. 1 is the embodiment of the invention realizes Multimedia Ring Back Tone service in the WCDMA system a system schematic;
Fig. 2 is the signaling process figure that the embodiment of the invention one realizes Multimedia Ring Back Tone service;
Fig. 3 is the signaling process figure that the embodiment of the invention one realizes the speech Ring Back Tone service;
Fig. 4 is the structural representation of protocol stack H.324M;
Fig. 5 is applied to the complete call flow schematic diagram of video call for the embodiment of the invention two;
Fig. 6 is the signaling process figure that the embodiment of the invention two realizes Multimedia Ring Back Tone service;
Fig. 7 is the secondary media consultation process schematic diagram of the embodiment of the invention two calling terminals.
Implement mode of the present invention
In order to make embodiment of the invention technical scheme and advantage clearer, below with reference to accompanying drawing, the embodiment of the invention is further elaborated.
In the evolution of mobile communications network, the terminal of different abilities and network equipment coexistence are very general situations, so Multimedia Ring Back Tone service must be considered terminal and the terminal of network system and support 3G standard and the situation of network system coexistence of supporting the 2G standard.In this case, must carry out capability negotiation between network side and the terminal, if the terminal and the network equipment are all supported Multimedia Ring Back Tone service, then to the terminal plays multimedia color ring back tone; Otherwise, to terminal plays speech CRBT.
To be example below, the embodiment of the invention will be described with the Wideband Code Division Multiple Access (WCDMA) in the 3G mobile communication system (WCDMA) system.The embodiment of communication system for other can draw with reference to the embodiment of the invention.
The system group network schematic diagram of realization Multimedia Ring Back Tone service as shown in Figure 1 in the WCDMA communications network system: provide the system of Multimedia Ring Back Tone service to comprise calling terminal (MO), node (NodeB) under the calling terminal, the calling terminal mobile switching centre (O-MSC) of node NodeB under the administration calling terminal, terminal called (MT), node NodeB under the terminal called, the terminal called mobile switching centre (T-MSC) of node (NodeB) under the administration terminal called, attaching position register (HLR) and multimedia audible ringing tone (Multimedia Ring Back Tone, MRBT) platform.
The MSC here mainly finishes Service Switching Function and CCF, is made up of MSC server (MSC Server) and media gateway (MGW).Adopt ISUP (ISUP) agreement, session initiation protocol (SIP) between MSC Server and the MRBT or carry out alternately with calling control (BICC) agreement of bearer independent; Adopt Time Division Multiplexing E1, ATM(Asynchronous Transfer Mode) or Internet Protocol (IP) carrying between MGW and the MRBT.O-MSC wherein is the visited MSC of calling terminal, and T-MSC is the terminal called visited MSC.T-MSC mainly preserves the terminal called current information, and is accomplished to continuing between the terminal called in calling procedure.Can adopt ISDN User Part, Session Initiation Protocol or Bearer Independent Call Control Protocol to carry out alternately between O-MSC and the T-MSC.MGW is used to finish continuing between MRBT platform and the terminal, and the multimedia color ring back tone that makes the MRBT platform send can send to calling terminal by MGW.
HLR is used to preserve the CAMEL-Subscription-Information of terminal, and mutual by HLR and MSC provides this MSC the current user terminal information of managing to MSC.
The MRBT platform is used to preserve the multimedia color ring back tone that terminal customizes in advance, when the success of paging terminal called, receives after the next response message (ANM) of terminal called MSC, and multimedia color ring back tone is sent to calling terminal by MGW.
In the system shown in Figure 1, MSC, terminal or MRBT platform can perhaps, increase special network element and be used to carry out media capability negotiation as the main body of media capability negotiation between terminal and the MRBT platform in system.Described media capability negotiation is exactly to determine common media formats type and the decoding process of supporting of both sides.Adopt the ISUP signaling to be elaborated in the following examples.
Embodiment one: initiate to carry out second time capability negotiation with the realization Multimedia Ring Back Tone service by the MRBT platform.
In the present embodiment, O-MSC calls out terminal called according to the request of calling terminal, and terminal called returns call message according to described calling; After O-MSC receives the call message that terminal called returns,, and connect speech channel between calling terminal and the MRBT platform with color ring type notice MRBT platform to be played; Then after the MRBT platform is initiated and is successfully carried out media capability negotiation with calling terminal, by the MRBT platform to calling terminal play multimedia CRBT.
Present embodiment can be when MSC Server possess the multimedia messages transmittability, and by cooperatively interacting between MGW and the MRBT platform, the calling terminal of administering to MSC provides the multimedia color ring back tone service.Only need recording user whether to open Multimedia Ring Back Tone service in HLR, relevant information and personalized customization information that the user opens Multimedia Ring Back Tone service are recorded in the MRBT platform., when MSC returns the response message of getting roaming information (SRI), can carry " SS-CODE " and come marking terminal whether to open Multimedia Ring Back Tone service at HLR.
The embodiment of the invention one that is respectively Fig. 2 and Fig. 3 realizes the flow chart of Multimedia Ring Back Tone service and realizes the flow chart of speech Ring Back Tone service in the WCDMA system.Among Fig. 2, suppose that calling terminal is the 3G communication network terminal, terminal called is the 3G communication network terminal, and calling terminal is initiated video call (VP) to terminal called, and the Signalling exchange between O-MSC and the T-MSC adopts ISDN User Part, and its concrete steps are:
The number of step 200, calling terminal dialing terminal called promptly sends to O-MSC and sets up (SETUP) message, initiates VP.This called terminal number is mobile subscriber's ISDN(Integrated Service Digital Network) number (MSISDN).
The MSISDN that step 201, O-MSC carry according to this calling sends the SRI message of inquiry terminal called current location information to HLR.
Step 202, HLR to the T-MSC at the current place of terminal called send obtain terminal called current roaming number obtain roaming number (PRN) message.
Step 203, T-MSC send the roaming number of terminal called to HLR by obtaining roaming number result (PRN-ACK) message.
Step 204, O-MSC judge whether to allow to carry out Multimedia Ring Back Tone service.Described Multimedia Ring Back Tone service can be customized by terminal called, then HLR sends to O-MSC with the roaming number of the terminal called that gets access to by getting roaming information result (SRI-ACK) message, in SRI-ACK message, SS-CODE is set to a particular value, this value is specified by operator, is used to identify terminal called and has opened Multimedia Ring Back Tone service.
In the practical application, Multimedia Ring Back Tone service also can be customized by calling terminal or third party, so O-MSC only need judge whether HLR preserves the Multimedia Ring Back Tone service that calling terminal, terminal called or third party have contracted in advance and enjoyed by calling terminal.
Step 205, O-MSC determine that according to SRI-ACK message calling terminal supports Ring Back Tone service, and calling that O-MSC supports according to calling terminal place network, calling terminal and the character of initiating this calling are determined that this is called out and is VP.
If the calling that the network support VP at calling terminal place, calling terminal support VP and calling terminal to initiate is VP, determine that then this is called out is VP; Otherwise, think that this is called out and be audio call that the processing procedure of whole audio call is as described in following Fig. 3.
O-MSC sends initial address (IAM) message to the MRBT platform, this message is carried called terminal number and is " Prefix+ Mobile Station Roaming Number (MSRN) ", wherein, Prefix is used to allow O-MSC that the MRBT platform is arrived in call proceeding, and indication calling this time is VP, the network at the current place of MSRN indication terminal called.
After step 206, MRBT platform are received IAM message, send the calling that this carries MSRN to T-MSC.
MSRN paging (PGAING) terminal called that step 207, T-MSC carry according to this calling.
After step 208, the terminal called paging success, send ring (ALERTING) message to T-MSC.
After step 209～210, T-MSC receive ALERTING message, send Address Complete Message (ACM) to O-MSC, inform that O-MSC connects calling terminal by the MRBT platform.
Step 211～212, O-MSC judgement can provide multimedia color ring back tone to calling terminal, after calling terminal sends ALERTING message, send connection (CONNECT) message again and connect, and do not charge this moment.
Carry out the media capability negotiation process first time between step 213, the calling terminal that receives CONNECT message and the MRBT platform, after consulting successfully, the MRBT platform is established to the communication link of calling terminal, and this communication link can only be the MGW through O-MSC through O-MSC.
If calling terminal and MRBT platform do not have the common medium type of supporting, then the MRBT platform needed earlier the medium type of multimedia color ring back tone to be converted to the type of calling terminal support before subsequent step 214 play multimedia CRBT.
Step 214, MRBT platform are searched the multimedia color ring back tone information of customization according to the audible ringing tone service information that sets in advance, by MGW to calling terminal play multimedia CRBT.Described audible ringing tone service information may comprise the number of terminal called, and the MRBT platform can find corresponding multimedia color ring back tone according to called terminal number; Terminal called may be provided with different multimedia color ring back tones to different termination numbers, the number that therefore may also further comprise calling terminal in the audible ringing tone service information, the MRBT platform need find in the multimedia color ring back tone that terminal called customizes, corresponding to the multimedia color ring back tone of calling terminal number according to called terminal number.
Step 215, terminal called send CONNECT message to T-MSC after replying this calling.
Step 216, T-MSC send response message (ANM) to the MRBT platform.
Step 217～218, MRBT platform carry out the media capability negotiation second time between calling terminal and the terminal called, consult successfully back connection calling terminal and terminal called, and send ANM to O-MSC.The media capability negotiation second time that described MRBT platform carries out between calling terminal and the terminal called is: the MRBT platform is initiated the media capability negotiation with terminal called, determine the common medium type of supporting of MRBT platform and terminal called, with abovementioned steps 213 determined MRBT platforms and the common medium type of supporting of calling terminal, obtain the common medium type of supporting of calling terminal and terminal called.The if there is no common medium type of supporting, then need the MRBT platform to carry out the conversion of medium type, be that the media stream transition that the MRBT platform will send to terminal called is the medium type that terminal called is supported, and be the medium type that calling terminal is supported the media stream transition that terminal called sends.
Described connection calling terminal and terminal called comprise following operation: the MRBT platform is set up from the MRBT platform through the communication link of T-MSC to terminal called, the communication link that this communication link set up and step 213 are set up couples together by the MRBT platform, promptly sets up from calling terminal through the communication link of MRBT platform to terminal called.
Step 219, the O-MSC that receives ANM begin calling terminal is chargeed.
After step 220, MRBT platform were finished the call capabilities negotiation of calling terminal and terminal called, calling terminal and terminal called were conversed.
Step 221～222, after calling terminal or terminal called finish this conversation, calling terminal sends to T-MSC by O-MSC and discharges (REL) message, perhaps terminal called sends REL message by T-MSC to O-MSC, remove being connected of calling terminal and terminal called, call release, return when release is finished to discharge and finish (RLC) message, O-MSC stops to charge to calling terminal.
Because the MRBT platform before giving calling terminal play multimedia CRBT, must be set up from the MRBT platform via the communication link of MGW to calling terminal, so must finish the call capabilities negotiation of MRBT platform and calling terminal.After MRBT platform and calling terminal were set up communication link, O-MSC can receive the ACM that the MRBT platform sends, and this moment, O-MSC can not charge; Must wait until between terminal called and the MRBT platform and set up communication link, and by the MRBT platform communication link of being set up and the calling terminal of having set up are coupled together to form to the communication link of MRBT platform and be connected after the communication link of calling terminal and terminal called, O-MSC receives the ANM that the MRBT platform sends, show on calling terminal and terminal called, just begin calling terminal is chargeed this moment, thereby avoided owing to the communication link of setting up MRBT platform and calling terminal for the transmission multimedia color ring back tone in advance will be to the problem of calling terminal charging, calling terminal can not paid because listening to multimedia color ring back tone, improve the enthusiasm that the user uses multimedia color ring back tone, helped carrying out of Multimedia Ring Back Tone service.
Pass through the communication link of the MGW of O-MSC in order to set up to calling terminal from the MRBT platform, MRBT platform and calling terminal carry out the negotiation of call capabilities, because MRBT platform this moment is not also known the call capabilities rank of terminal called, the MRBT platform can be selected a media formats according to the call capabilities rank that calling terminal is supported, the communication link that is passed through by the MRBT platform to be set up is to calling terminal play multimedia CRBT.By the time after the terminal called off-hook was replied, the MRBT platform carries out call capabilities with terminal called again to be consulted, if terminal called does not support the MRBT platform for the selected media formats of calling terminal, then can cause this call failure.
The embodiment of the invention can also be before carrying out Multimedia Ring Back Tone service, investigate and add up the call capabilities rank that various 3G communication terminals are supported in the current communication network, the media formats of selecting all terminals all to support, in the MRBT platform, be configured, in play multimedia CRBT and calling terminal and terminal called communication process, carry out the foundation that call capabilities is consulted as MRBT platform and calling terminal, terminal called.
The embodiment of the invention can be arranged several call capabilities ranks in the MRBT platform, be used for the communication link selected form of selected this foundation from the MRBT platform to calling terminal, set up the signalling interactive process that call capabilities that communication link will carry out is consulted, the response time of shortening play multimedia CRBT thereby reduce.
When in case terminal called is not supported in the media formats of calling terminal support selected in the play multimedia CRBT process, by the MRBT platform in communication process, with the media stream transition that sends to terminal called is the medium type that terminal called is supported, and with the media stream transition that terminal called sends is the medium type that calling terminal is supported, can normally carry out to guarantee the communication between calling terminal and the terminal called.
MRBT platform in the embodiment of the invention can also be stored the voice CRBT to the calling terminal broadcast of terminal called customization.Fig. 3 is the signaling process figure that the embodiment of the invention one realizes the speech Ring Back Tone service.Suppose that calling terminal is the 3G communication network terminal, terminal called is the second generation (2G) communication network terminal, and calling terminal is initiated audio call to terminal called, and perhaps calling terminal is in the 2G network-originated call, adopt ISDN User Part between O-MSC and the T-MSC, concrete steps are:
The number of step 300, calling terminal dialing terminal called promptly sends SETUP message to O-MSC, initiates audio call, and this called terminal number is MSISDN, and MSISDN is used to indicate terminal called.
Step 301, O-MSC send the SRI message of inquiry terminal called current location information to HLR.
Step 302, HLR send the PRN message of obtaining terminal called current roaming number to the T-MSC at the current place of terminal called.
Step 303, T-MSC send the roaming number of terminal called to HLR by PRN-ACK message.
Step 304, HLR send to O-MSC with the roaming number of the terminal called that gets access to by SRI-ACK message, and in SRI-ACK message, SS-CODE is set to a particular value, is specifically specified by operator, is used to identify terminal called and opens Ring Back Tone service.
Step 305, O-MSC determine that according to SRI-ACK message terminal called supports Ring Back Tone service, and O-MSC is according to calling terminal place network and the character of initiating this calling, determine that this is called out to be audio call.
If the communication network at calling terminal place is supported VP, the calling that calling terminal supports VP and calling terminal to initiate is VP, determines that then this calling is VP, and the processing of whole VP as shown in Figure 2; Otherwise, think that this is called out is audio call.
O-MSC sends the calling that this carries MSRN to T-MSC, promptly sends IAM.
The MSRN paging terminal called that step 306, T-MSC carry according to this calling.
After step 307, the terminal called paging success, send ALERTING message to T-MSC.
Step 308, receive that the T-MSC of ALERTING message sends ACM to O-MSC.
Step 309～310, the O-MSC that receives ACM send ALERTING message to calling terminal, simultaneously, by sending IAM message to the MRBT platform, set up from calling terminal by the communication link of O-MSC to the MRBT platform.
Step 311, receive that the MRBT platform of IAM message sends ACM to O-MSC.
Step 312, MRBT platform are searched terminal called the multimedia bell information of customized by calling terminal are play the voice CRBT by O-MSC to calling terminal according to the Ring Back Tone service information that terminal called sets in advance.
Step 313, terminal called send CONNECT message to T-MSC after replying this calling.
Step 314, T-MSC send ANM to O-MSC.
Step 315～317, the O-MSC that receives ANM send CONNECT message to calling terminal, carry out after call capabilities between calling terminal and the terminal called consults, and set up the talking link of calling terminal and terminal called, begin calling terminal is chargeed.
Step 318～319, O-MSC send REL message to the MRBT platform, the communication link between dismounting and the MRBT platform.The MRBT platform of receiving REL message stops to play the voice CRBT to calling terminal, discharges the communication link of MRBT platform and O-MSC, sends RLC message to O-MSC.
The talking link that step 320, calling terminal and terminal called pass through to be set up is conversed.
Step 321～322, after calling terminal or terminal called finish this conversation, calling terminal successively by O-MSC and T-MSC to terminal called, perhaps terminal called sends REL message by T-MSC and O-MSC to calling terminal successively, remove being connected of calling terminal and terminal called, call release, O-MSC stops to charge to calling terminal.
Not only can adopt ISDN User Part between the O-MSC of present embodiment and the T-MSC, also can adopt other agreements, as Bearer Independent Call Control Protocol or Session Initiation Protocol.
The MRBT platform of the embodiment of the invention comprises Ring Back Tone service module, link establishment module, capability negotiation module and media format conversion module.Wherein,
The Ring Back Tone service module is used to store multimedia color ring back tone, and the business information of multimedia color ring back tone is set, and described business information can be the called terminal number of multimedia color ring back tone correspondence, also the number of corresponding calling terminal; According to obtaining corresponding multimedia color ring back tone, and after the capability negotiation module is finished capability negotiation with calling terminal, described CRBT is play to calling terminal from the called terminal number of O-MSC or calling terminal number.The Ring Back Tone service module can also compatiblely have the speech Ring Back Tone service now, realizes the correlation function of speech Ring Back Tone service.
Module is set up in link, is used for carrying out alternately with O-MSC, sets up the MRBT platform by the link of O-MSC to calling terminal.
The capability negotiation module comprises the first capability negotiation module and the second capability negotiation module, and wherein the first capability negotiation module is used for carrying out media capability negotiation with calling terminal, and with the result notification Ring Back Tone service module of consulting; The second capability negotiation module is used for behind the terminal called answering call, carry out media capability negotiation with terminal called, notice link is set up module and is set up the MRBT platform by the link of T-MSC to terminal called then, and this link is formed speech channel between calling terminal and the terminal called with the MRBT platform of having set up to the link of calling terminal.
The media format conversion module is used for the media capability according to the resulting calling terminal of the first capability negotiation module, and multimedia color ring back tone is converted to the form that calling terminal is supported; Also be used for negotiation result, be the medium type of terminal called support with the media stream transition that sends to terminal called and be the medium type that calling terminal is supported the media stream transition that terminal called sends according to the first capability negotiation module and the second capability negotiation module.
Embodiment two: initiate to carry out second time capability negotiation with the realization Multimedia Ring Back Tone service by calling terminal.
In the present embodiment, O-MSC calls out terminal called according to the request of calling terminal, and terminal called returns call message according to described calling; After O-MSC receives the call message that terminal called returns,, and connect speech channel between calling terminal and the MRBT platform with color ring type notice MRBT platform to be played; Then after calling terminal and MRBT platform successfully carry out the media negotiation first time, by the MRBT platform to calling terminal play multimedia CRBT.In the present embodiment, after terminal called is replied the calling of calling terminal, can also carry out the media negotiation second time by calling terminal and terminal called, after the second time, capability negotiation was finished, calling terminal and terminal called were conversed.
In order to support the video call of 3G circuit domain, H.324M agreement need be supported in the 3G video terminal.Fig. 4 is the structural representation of protocol stack H.324M.Referring to Fig. 4, H.324M agreement is stipulated: set up in the process at a video call, after network side is finished out-of-band signalling control based on broadband integrated services digital network user part (ISUP) agreement or bearer independent call control (BICC) agreement, between terminal and the terminal or between terminal and the business platform, need carry out the in-band signalling control and treatment based on H.245, comprise that terminal capability negotiation, principal and subordinate determine, the logical channel opening/closing, send multi-meter etc.
Present embodiment increases the media negotiation function in advance in the MRBT platform, make the MRBT platform can serve as virtual terminal H.245 in media consultation process and finish media negotiation with calling terminal; And embodiment need increase the support to video and audio coding decoding form in the MRBT platform, with to user's play multimedia CRBT.
Fig. 5 is applied to the complete call flow schematic diagram of video call for the embodiment of the invention two.Referring to Fig. 5, this method may further comprise the steps:
Step 501:O-MSC receives the call request from calling terminal, calls out terminal called according to the called terminal number that carries in this call request, and terminal called returns call message according to described calling.
After step 502:O-MSC receives the call message that terminal called returns,, and connect speech channel between calling terminal and the MRBT platform with color ring type notice MRBT platform to be played.
Step 503: calling terminal and MRBT platform carry out the media capability negotiation first time, if consult successfully, then the MRBT platform is to calling terminal play multimedia CRBT.
Step 504: terminal called is replied the calling of calling terminal, and after calling terminal and terminal called successfully carried out the media negotiation second time, calling terminal and terminal called were conversed.
Step 505: behind calling terminal and the terminal called end of conversation, free system resources.
So far, this video calling finishes.
Embodiment two system networking structure is referring to Fig. 1.The MRBT platform provides multimedia and media negotiation function, is used for carrying out the media negotiation first time with described calling terminal, and to described calling terminal play multimedia CRBT.
Calling terminal is used for making a call to terminal called, initiates media negotiation for the first time to the MRBT platform, and is used for carrying out the media negotiation second time with terminal called;
O-MSC is used for the calling according to described calling terminal initiation, and the described terminal called of outgoing call receives the call message that terminal called returns, and notifies the MRBT platform color ring type to be played, and connects the speech channel between described calling terminal and the described MRBT platform;
Terminal called is used for the calling according to described O-MSC, returns call message, and is used for carrying out the media negotiation second time with calling terminal.
Suppose that calling terminal and terminal called are the professional 3G subscription of signatory elementary video phone (VP), and terminal called is the contracted user of Multimedia Ring Back Tone service, and, in order to simplify description, suppose that calling terminal and terminal called belong to same HLR, and adopt the ISDN User Part signaling to carry out alternately between O_MSC and the T_MSC, between MSC and the MRBT platform.
Fig. 6 is the signaling process figure that the embodiment of the invention two realizes Multimedia Ring Back Tone service.This signaling process may further comprise the steps:
Step 601: the number of calling terminal dialing terminal called, initiate to connect (SETUP) message to O_MSC.
Step 602:O_MSC sends SRI message to HLR.
Step 603:HLR sends (PRN) message that Provides Roaming Number according to the SRI message that receives from O_MSC to the T_MSC at terminal called place;
Step 604:T_MSC receives the PRN message that comes from HLR, and by PRN response (PRN_ACK) message, returns the roaming number of terminal called to HLR.
Step 605:HLR will send to O_MSC by SRI response (SRI_ACK) message from the terminal called roaming information that T_MSC obtains, and the SS_CODE field in this SRI response message is changed to 254 (0XFE), expression terminal called customizing multimedia Ring Back Tone service.Equally, Multimedia Ring Back Tone service also can be as embodiment one, by calling terminal or third party's customization.
Step 606:O_MSC analyzes, writes down the terminal called attribute according to the SS_CODE that receives, and passes through initial address message (IAM) to the calling of T_MSC initiation to terminal called.
Step 606 is to step 609:T_MSC paging terminal called (PAGING); Terminal called returns page response (PAGING_ACK) to T_MSC, and sends ALERTING message (Alerting) to T_MSC.
After step 610:T_MSC receives the Alerting message of terminal called transmission, send Address Complete Message (ACM) to O_MSC.
Step 611:O_MSC sends ALERTING message (Alerting) to calling terminal.
Step 612:O_MSC as called terminal number, sends initial address message (IAM) to the MRBT platform with the MSISDN of terminal called, and notice MRBT platform play multimedia CRBT still is the speech CRBT in this IAM message;
In this step, O_MSC determines that the method for color ring type to be played is:
The terminal called attribute of O_MSC analytical procedure 606 records, the SS_CODE field is changed to 254 (0XFE) in this example, and the expression terminal called is opened Multimedia Ring Back Tone service;
The MSC that makes a call according to calling terminal then, i.e. the network at O_MSC place, and the character that makes a call is correspondingly processed:
If the video call that this calling is a calling terminal to be initiated in 3G network is then determined notify MRBT platform play multimedia CRBT; If the ordinary call that this calling is a calling terminal to be initiated in 3G network or this calling are the callings that calling terminal is initiated in other networks except that 3G network, then determine notify MRBT platform voice played CRBT;
If the play multimedia CRBT then continues execution in step 613, adopt embodiment of the invention subsequent step to handle; If the voice played CRBT, then its subsequent treatment is identical with existing speech Ring Back Tone Technology.
Step 613 to step 614:MRBT platform to full message in O_MSC return address (ACM) and response message (ANM), prepare the play multimedia CRBT;
In this step, the MRBT platform is according to the number of calling terminal and terminal called, and the inquiry terminal called is at the customized information of calling terminal, and the multimedia color ring back tone that definite preparation is play according to the information that receives from O_MSC.
Step 615:O_MSC connects the speech channel between calling terminal and the MRBT platform, and do not charge this moment.
Step 616: calling terminal is initiated media negotiation to the MRBT platform, and the MRBT platform adopts that H.245 agreement and calling terminal are carried out media negotiation and connected network;
Media negotiation in this step is the media negotiation first time of calling terminal.
Step 617:MRBT platform is to calling terminal play multimedia CRBT.
Step 618: terminal called is replied the calling of calling terminal, and terminal called sends to T_MSC and connects (CONNECT) message.
Step 619:T_MSC sends response message (ANM) calling terminal to O_MSC.
After step 620:O_MSC receives the response message of T_MSC, remove with the MRBT platform between carrying is connected, to MRBT platform transmission release resource (REL) message.
Step 621: after discharging resource, the MRBT platform returns to discharge to O_MSC finishes (RLC) message.
Step 622:O_MSC connects the speech channel between calling terminal and the terminal called, and begins calling terminal is chargeed; Terminal called is initiated media negotiation, adopts H.245 agreement to finish with the terminal media of terminal called by calling terminal and consults;
In this step, media negotiation also can be initiated by calling terminal, and the media consultation process in this step is the media negotiation second time of calling terminal.
Step 623: calling terminal finish and terminal called between media consultation process after, calling terminal and terminal called are conversed.
Step 624: when the calling terminal on-hook, O_MSC send to discharge resource (REL) message to T_MSC, removes being connected between calling terminal and the terminal called.
Step 625: after removing connection, T_MSC returns to discharge to O_MSC and finishes (RLC) message.
So far, finish the Signalling exchange that the embodiment of the invention realizes the Multimedia Ring Back Tone service scheme.
Fig. 7 is the secondary media consultation process schematic diagram of the embodiment of the invention two calling terminals.This process may further comprise the steps:
Step 701: calling terminal is consulted to MRBT platform initiating capacity.
Step 702: calling terminal is initiated master-slave negotiation to the MRBT platform.
Step 703: calling terminal is initiated multiplex consultation to the MRBT platform.
Step 704: calling terminal initiates to open passage to the MRBT platform.
Step 705: calling terminal is initiated closing passage to the MRBT platform, and the MRBT platform is removed speech channel closing passage before.
Step 706: calling terminal initiates to close H.245 session to the MRBT platform.
Step 707: calling terminal is consulted to the terminal called initiating capacity.
Step 708: calling terminal is initiated master-slave negotiation to terminal called.
Step 709: calling terminal is initiated multiplex consultation to terminal called.
Step 710: calling terminal initiates to open passage to terminal called.
Step 711: calling terminal is initiated closing passage to terminal called, and terminal called is removed speech channel closing passage before.
Step 712: calling terminal initiates to close H.245 session to terminal called.
In the media consultation process, step 707 to the negotiation of step 712 also can be initiated to calling terminal by terminal called as shown in Figure 7.
The calling outgoing call terminal called that embodiment two is initiated according to calling terminal by O-MSC, terminal called returns call message according to described calling; After O-MSC receives the call message that terminal called returns,, and connect speech channel between calling terminal and the MRBT platform with color ring type notice MRBT platform to be played; After calling terminal and MRBT platform successfully carried out the media negotiation first time, the MRBT platform was to calling terminal play multimedia CRBT then.
In addition, terminal called is replied after the calling of calling terminal, can carry out the media negotiation second time by calling terminal and terminal called, makes that the calling and called terminal can be in the basic enterprising words that work of this negotiation; After capability negotiation was finished for the second time, calling terminal and terminal called were conversed.So, make network equipment can adopt Multimedia Ring Back Tone service is provided with the on all four speech path control mode of speech CRBT.
Embodiment two requires terminal to have the ability of secondary media capability negotiation, comprises as lower module:
The conversation module is used to make a call or answer the call, and realizes and the conversation of distant terminal that this module can be the conversation module of existing terminal.
The CRBT display module is used to show multimedia color ring back tone or the speech CRBT received.
The media capability negotiation module is used for carrying out media capability negotiation with the MRBT platform behind the communication link of this terminal as calling terminal foundation and MRBT platform; Carry out media capability negotiation as calling terminal (or terminal called) and terminal called (or calling terminal).
Can obtain with reference to the foregoing description the scheme of carrying out capability negotiation between calling terminal and the MRBT platform by MSC or independent network element.
Because the Ring Back Tone service of the embodiment of the invention is the business that calling terminal is enjoyed, whether support that with the attribute of calling terminal and the network at calling terminal place multimedia color ring back tone is relevant so play the processing rule of voice CRBT and play multimedia CRBT, and whether support multimedia color ring back tone irrelevant with the attribute of terminal called and the communication network at terminal called place.Different calling terminals are realized the regular as follows of dissimilar CRBT in different communication network:
When calling terminal is the 2G terminal, the communication network at calling terminal place is the 2G communication network, and the embodiment of the invention can be play the voice CRBT to calling terminal; When calling terminal is the 2G terminal, the communication network at calling terminal place is the 3G communication network, and the embodiment of the invention can be play the voice CRBT to calling terminal; When calling terminal is a 3G terminal, the communication network at calling terminal place is the 2G communication network, and the embodiment of the invention can be play the voice CRBT to calling terminal; When calling terminal is a 3G terminal, the communication network at calling terminal place is the 3G communication network, and no matter the network at terminal called place is 3G network or 2G network, and the embodiment of the invention can be given calling terminal play multimedia CRBT.
In 3G network, when calling terminal and terminal called are conversed, if calling terminal is the network at 3G communication network terminal and calling terminal place is the 3G communication network, and terminal called is 2G terminal or terminal called is that 3G terminal is worked as terminal called and do not supported that VP or terminal called are 3G terminal but the network at terminal called place is the 2G network, then calling terminal and terminal called can only carry out voice call, and can not carry out video calling.
The embodiment of the invention not only can realize Multimedia Ring Back Tone service in the WCDMA system, and can realize Multimedia Ring Back Tone service in the 3G communication network of supporting the multimedia messages transmission.
Simultaneously, when the embodiment of the invention is the 2G terminal when terminal called, perhaps terminal called is a 3G terminal but terminal called is not supported VP, perhaps terminal called is that 3G terminal but the network at terminal called place are when being the 2G network, the embodiment of the invention provides the multimedia color ring back tone service also can for this Terminal Type, and guarantee that calling terminal and terminal called can normally converse, be that 2G terminal or the 3G terminal of not supporting VP or terminal are that 3G terminal but the network at terminal place are when being the 2G network, also can apply for Multimedia Ring Back Tone service, when the 3G terminal of supporting VP as the calling terminal dialing application Multimedia Ring Back Tone service the 2G terminal or when not supporting the 3G terminal of VP, to this calling terminal play multimedia CRBT.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.

Claims (11)

1. a method that realizes Multimedia Ring Back Tone service is characterized in that, this method comprises the steps:
In the call proceeding process, before terminal called was replied, multimedia audible ringing tone MRBT platform was received the Multimedia Ring Back Tone service request from calling mobile exchanging center O-MSC, carried out the media capability negotiation first time with calling terminal;
The MRBT platform is set up the link from the MRBT platform to calling terminal, to calling terminal play multimedia CRBT according to the result of described media capability negotiation; Behind the terminal called answering call, the MRBT platform carries out the second time media capability negotiation relevant with terminal called, the MRBT platform is set up the link of terminal called to the MRBT platform, and with the speech channel of the calling and called terminal that connects, the speech channel that the calling and called terminal is passed through to be set up is conversed.
2. method according to claim 1, it is characterized in that, described MRBT platform and calling terminal carry out before the media capability negotiation first time, further comprise: calling mobile exchanging center O-MSC judges whether to allow to carry out Multimedia Ring Back Tone service and this calling is video call, if then carry out described subsequent step, otherwise carry out the existing voice call flow.
3. method according to claim 2 is characterized in that, described O-MSC judges whether to allow to carry out Multimedia Ring Back Tone service and comprises:
O-MSC judges whether the Multimedia Ring Back Tone service that calling terminal, terminal called or third party have contracted in advance and enjoyed by calling terminal to the CAMEL-Subscription-Information that attaching position register HLR obtains Ring Back Tone service according to the CAMEL-Subscription-Information that is obtained.
4. method according to claim 2 is characterized in that, described O-MSC judges that this calling for video call is: the calling that the network support video call at calling terminal place, calling terminal support video call and calling terminal to initiate is a video call.
5. method according to claim 1, it is characterized in that, the multimedia color ring back tone that described MRBT platform is play the definite medium type of institute to calling terminal comprises: the MRBT platform is converted to the medium type of calling terminal support with multimedia color ring back tone, plays described multimedia color ring back tone to calling terminal again.
6. method according to claim 1 is characterized in that, described MRBT platform carries out the second time media capability negotiation relevant with terminal called and comprises:
MRBT platform and terminal called carry out media capability negotiation, and in conjunction with the determined medium type of the media capability negotiation first time, obtain the common medium type of supporting of calling terminal and terminal called.
7. method according to claim 1, it is characterized in that, the speech channel that described calling and called terminal passes through to be set up is conversed and comprised: the media stream transition that the MRBT platform will send to terminal called is the medium type that terminal called is supported, the media stream transition that terminal called is sent is the medium type that calling terminal is supported.
8. a MRBT platform is characterized in that, described MRBT platform comprises:
The first capability negotiation module is used for carrying out media capability negotiation with calling terminal, notice Ring Back Tone service module after consulting to finish;
The Ring Back Tone service module is used to obtain multimedia color ring back tone, and after the notice of receiving the first capability negotiation module, plays described multimedia color ring back tone to calling terminal;
The second capability negotiation module is used for carrying out media capability negotiation with terminal called, consults back notice link and sets up module;
Module is set up in link, is used for carrying out alternately with O-MSC, sets up linking between MRBT platform and the calling terminal; Be used to set up linking of MRBT platform and terminal called.
9. MRBT platform according to claim 8, it is characterized in that, described MRBT platform further comprises the media format conversion module, the media capability that is used for the calling terminal that obtains according to the first capability negotiation module, the multimedia color ring back tone that the Ring Back Tone service module is obtained is converted to the form that calling terminal is supported; And/or, be the medium type of terminal called support with the media stream transition that sends to terminal called and be the medium type that calling terminal is supported the media stream transition that terminal called sends.
10. a system that realizes Multimedia Ring Back Tone service comprises O-MSC and the T-MSC of terminal called mobile switching centre, it is characterized in that this system comprises the MRBT platform, wherein,
Described O-MSC is used for calling out terminal called by T-MSC, and sending the Multimedia Ring Back Tone service request to the MRBT platform after the request that receives calling terminal calling terminal called;
Described MRBT platform carries out the media capability negotiation first time with calling terminal after being used to receive Multimedia Ring Back Tone service request from O-MSC, and behind described media capability negotiation to calling terminal play multimedia CRBT;
Described MRBT platform comprises the second media capability negotiation module, is used for carrying out media capability negotiation with terminal called;
Described MRBT platform is set up the link of terminal called to the MRBT platform, and with the speech channel of the calling and called terminal that connects, the speech channel that the calling and called terminal is passed through to be set up is conversed.
11. system according to claim 10 is characterized in that, described system further comprises VLR Visitor Location Register HLR, is used to store the CAMEL-Subscription-Information of Multimedia Ring Back Tone service;
Then described O-MSC is further used for obtaining to HLR the CAMEL-Subscription-Information of Multimedia Ring Back Tone service; And according to the CAMEL-Subscription-Information of the Multimedia Ring Back Tone service that is obtained, and/or calling terminal the calling character and the residing network of calling terminal of initiating, judging whether provides Multimedia Ring Back Tone service to calling terminal, and with the result notification MRBT platform of judging.
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PCT/CN2007/000737 WO2007104241A1 (en) 2006-03-10 2007-03-07 A device and system for realizing the multimedia ring back tone service and a method thereof
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