CN102571819A - Method, system and device for realizing multimedia color ring back tone service - Google Patents

Abstract

The embodiment of the present invention provides a method for realizing the multimedia CRBT service, including: the calling terminal initiates a call request; according to the call request, the strategy of playing the CRBT is analyzed, and the strategy of playing the CRBT refers to playing the calling CRBT or the called CRBT strategy, or the strategy for filtering CRBT; carry out calling CRBT media negotiation or called CRBT media negotiation or not perform CRBT media negotiation according to the analysis result; after receiving the called ringing signal, according to the media negotiation result, send Play the calling ringback tone or the called ringback tone or not play the ringback tone. Through the technical solution provided by the embodiment of the present invention, the calling ring back ring service can be realized in the IMS field, and the calling user can be provided with the calling ring back ring service or the called ring back ring service according to a customized strategy, and the ring back ring filtering service can also be realized at the same time. This ensures the autonomy of users in experiencing the CRBT service.

Description

A method, system and device for realizing multimedia ring back tone service

technical field

The invention relates to the field of communication, in particular to a method, system and device for realizing multimedia ring back tone service.

Background technique

IP Multimedia Subsystem (IMS, IP Multimedia Subsystem) is a subsystem that supports IP multimedia services proposed by the 3rd generation mobile communication partner organization 3GPP in the Release 5 standard. IMS uses the Session Initiation Protocol (SIP, Session Initiation Protocol) call control mechanism to create, manage and terminate various types of multimedia services. IMS provides the basis for business convergence, and it supports voice, data and multimedia services as well as new applications based on IP technology.

The IMS domain color ring service is a called service. When the calling party initiates a call through the IMS domain and the called party can receive the incoming call, if the called party is a ring back ring subscriber and has subscribed to the related ring back ring, the calling party waits for the called party to answer the call. The ring back tone heard during the call will be replaced by the playback of the customized ring tone (such as: audio, video or other multimedia files) by the called party.

Accompanying drawing 1 is the called service flow chart of IMS domain color ring tone:

Step 101. The calling party initiates an IMS call request;

Step 102. The called session control function server (CSCF, Serving-Call Session Control Function) accepts the IMS call, and the called CSCF judges whether the called party is Subscribed to the CRBT service;

Step 103. If the called party does not subscribe to the CRBT service, the called CSCF sends IMS call signaling to the called party;

Step 104. If the called party subscribes to the color ring service, the called CSCF triggers the call signaling to the called ring ring application server (AS, Application Server);

Step 105. The called CRBT AS starts media negotiation between the calling party and the called media resource server (MRS, Media Resource Server), and sends call signaling to the called party through the CSCF;

Step 106. The called CRBT AS instructs the called MRS to play the CRBT to the calling party when the called party rings.

The above-mentioned services can realize playing IMS color ring to the calling party, but the played color ring is customized by the called user, which embodies the personalized color of the called user. There is no ring back tone service for calling users with personalized colors, and there is no solution for whether to play the calling ring back tone or the called ring back tone to the calling user when the calling party and the called party are multimedia ring back tone users at the same time. In addition, the calling user may also want to filter ring tones.

Contents of the invention

In order to implement the scheme of playing the calling party or the called party to the calling user according to the user setting when the calling party and the called party are both multimedia ring back ring users in the IMS domain, the embodiment of the present invention provides a method for realizing the calling ring back ring. Including: the calling terminal initiates a call request; according to the call request, analyze the strategy of playing the CRBT, the strategy of playing the CRBT refers to the strategy of playing the calling CRBT or the called CRBT; according to the result of the analysis, perform media negotiation of the calling CRBT or Called CRBT media negotiation: After receiving the called ring signal, play the calling CRBT or called CRBT to the calling party according to the media negotiation result.

The embodiment of the present invention further provides a system for realizing the CRBT service, including: a calling terminal, used to initiate a call request; a CRBT policy configuration unit, used to set a strategy for playing The strategy of calling CRBT; the CRBT strategy analysis unit, used to analyze the strategy of playing CRBT according to the call request; the media resource server MRS, used for performing CRBT media negotiation with the caller according to the analysis result, and playing the CRBT to the caller.

The embodiment of the present invention further provides a calling terminal, including: a sending unit, used to send a call request; a color ring policy configuration unit, used to set a strategy for playing a color Strategy; a color ring ID adding unit, configured to add a calling color ring ID or a called color ring ID in a call request according to the policy.

The embodiment of the present invention further provides a calling terminal, including: a sending unit, used to send a call request; a color ring policy configuration unit, used to set a strategy for playing a color Strategy; the color ring back tone policy analysis unit, configured to decide to perform early media negotiation between the calling MRS and the calling MRS or to perform early media negotiation between the calling MRS and the called MRS according to the playing color ring back tone strategy.

The embodiment of the present invention further provides a CRBT application server, including: a CRBT policy analysis unit, configured to analyze the strategy for playing the CRBT, and trigger the calling CRBT or the called CRBT according to the strategy;

The media negotiation unit is configured to perform media negotiation between the calling party and the media resource server determined by the policy according to the analysis result.

The embodiment of the present invention further provides a call session control function server, including: an authentication unit, which is used to judge whether the terminal user is a CRBT user according to the terminal identifier in the call request and the customized relationship between the terminal identifier and the CRBT service saved by the HSS ; The color ring policy analysis unit is used to analyze the color ring playing strategy carried in the call request, and trigger the call signaling of the color ring user according to the policy to trigger the calling color ring application server or the called color ring application server.

The embodiment of the present invention further provides a CRBT application server, which is characterized in that it includes: a CRBT policy configuration unit for setting a strategy for playing a CRBT, the strategy being a strategy for playing a calling CRBT or a called CRBT; a media negotiation unit , for performing media negotiation between the calling party and the calling or called media resource server determined by the policy according to the result of parsing the playing policy.

The embodiment of the present invention further provides a CRBT application server, which is characterized in that it includes: a CRBT policy configuration unit for setting a strategy for playing a CRBT, the strategy being a strategy for playing a calling CRBT or a called CRBT; CRBT strategy analysis The unit is used to analyze the strategy of playing the CRBT, and trigger the calling CRBT or the called CRBT according to the analysis result; the media negotiation unit is used to perform the calling and the calling determined by the strategy according to the result of analyzing the playing strategy. Or media negotiation between called media resource servers.

The embodiment of the present invention further provides a method for implementing multimedia color ring filtering, including: receiving a call request initiated by a calling terminal; judging whether to filter the color ring according to the call request; and filtering the color ring according to the judgment result.

The embodiment of the present invention further provides a method for filtering multimedia ring back tones, including: the calling terminal initiates a call request, and receives the early media negotiation request of the ring tones; judges whether to filter the ring tones according to the stored ring tones filtering strategy; rejects the ring tones according to the judgment result Media negotiation, or refuse to play the ring tone, or refuse to open the media channel.

An embodiment of the present invention further provides a server, including: a receiving unit, configured to receive a call request initiated by a calling terminal; a judging unit, configured to judge whether a color ring tone needs to be filtered according to the call request; a filtering unit, configured to filter the ring tones.

The embodiment of the present invention further provides a terminal, including: a transceiver unit, used to initiate a call request, and receive a CRBT early media negotiation request; a policy unit, used to store a CRBT filtering strategy; and a filtering unit, used to filter the CRBT strategy according to the storage Judging whether to filter the CRBT, rejecting the CRBT media negotiation, or refusing to play the CRBT, or refusing to open the media channel according to the judgment result.

The embodiment of the present invention further provides a method for realizing the multimedia ring back tone service, including: receiving a call request initiated by the calling terminal; sending the call request to the called party, and receiving a call response message returned by the called party; and the call response message to play the calling ringtone or the called ringtone to the calling terminal.

The embodiment of the present invention further provides a CRBT application server, including: a transceiver unit, configured to receive a call request initiated by a calling terminal, send the call request to a called party, and receive a call response message returned by the called party; a strategy unit, It is used to save the strategy of playing the color ring; the playing unit, the user plays the calling ring or the called ring to the calling terminal according to the playing strategy of the ring and the call response message.

The technical solution provided by the embodiment of the present invention can realize the calling ring back tone service in the IMS field. When both the calling user and the called user are multimedia ring back ring user, it can decide to provide the calling user with the calling ring back ring service or be called according to the customized strategy. It's called CRBT service.

Description of drawings

Fig. 1 is the called service flowchart of the IMS domain color ring tone in the prior art;

Fig. 2 is a kind of system that realizes the multimedia ring back tone service that the embodiment B1 of the present invention provides;

FIG. 3 is a calling terminal provided by Embodiment B2 of the present invention;

Fig. 4 is a kind of CRBT application server provided by embodiment B3 of the present invention;

FIG. 5 is a call session control function server provided by Embodiment B4 of the present invention;

Fig. 6 is a kind of CRBT application server provided by Embodiment B5 of the present invention;

Fig. 7 is a kind of CRBT application server provided by Embodiment B6 of the present invention;

FIG. 8 is a calling terminal provided by Embodiment B7 of the present invention;

FIG. 9 is a method for realizing the IMS ring back tone service provided by C0 of the embodiment of the present invention;

FIG. 10 is a method for realizing the IMS ring back tone service provided by Embodiment C1 of the present invention;

FIG. 11 is a method for realizing the IMS ring back tone service provided by embodiment C2 of the present invention;

FIG. 12 is a method for realizing the IMS ring back tone service provided by embodiment C3 of the present invention;

FIG. 13 is a method for realizing IMS ring back tone service provided by embodiment C4 of the present invention;

FIG. 14 is a method for realizing the IMS ring back tone service provided by embodiment C5 of the present invention;

FIG. 15 is a method for realizing the IMS ring back tone service provided by Embodiment C6 of the present invention;

FIG. 16 is a method for realizing the IMS ring back tone service provided by Embodiment C7 of the present invention;

FIG. 17 is a method for realizing the IMS ring back tone service provided by embodiment C8 of the present invention;

FIG. 18 is a method for realizing IMS ring back tone service provided by embodiment C9 of the present invention;

FIG. 19 is a method for realizing the IMS ring back tone service provided by Embodiment C10 of the present invention;

FIG. 20 is a method for realizing the IMS ring back tone service provided by Embodiment C11 of the present invention;

FIG. 21 is a method for implementing IMS color ring service filtering provided by embodiment C12 of the present invention;

FIG. 22 is a method for implementing IMS ring back tone service filtering provided by Embodiment C13 of the present invention;

FIG. 23 is a method for implementing IMS ring back tone service filtering provided by Embodiment C14 of the present invention;

Figure 24 is a server provided by an embodiment of the present invention;

FIG. 25 is a terminal provided by an embodiment of the present invention;

Fig. 26 is a flowchart of a color ring selection method provided by an embodiment of the present invention;

Fig. 27 is a flow chart of another method for selecting a color ring tone provided by an embodiment of the present invention;

Fig. 28 is a flow chart of another method for selecting a color ring tone provided by an embodiment of the present invention;

Fig. 29 is a schematic structural diagram of a CRBT AS provided by an embodiment of the present invention.

Detailed ways

Referring to FIG. 2 , embodiment B1 of the present invention provides a system for implementing a multimedia CRBT service, including: a calling terminal 101, a call session control function server CSCF102, a CRBT application server AS104, a media resource server MRS105, a called terminal 103, a CRBT Policy configuration unit 106, CRBT policy parsing unit 107, wherein the calling terminal 101 is used to initiate a call request; the call session control function server CSCF102 is used to send the call request to the CRBT application server AS104; the CRBT application server AS104 is used to Carry out media negotiation between the calling party and the media resource server MRS; CRBT policy configuration unit 106 is used to set the strategy of playing CRBT, which is the strategy of playing the calling CRBT and called CRBT; CRBT strategy analysis unit 107 uses In analyzing the strategy of playing the CRBT, the media resource server MRS105 is used to perform CRBT media negotiation with the caller according to the analysis result, and play the CRBT to the calling party. The CRBT policy configuration unit 106 is set in the calling terminal 101 in FIG. The policy analysis unit 107 is set in the CRBT AS104.

More broadly, the CRBT policy configuration unit 106 can be set in the calling terminal 101, and the CRBT policy analysis unit 107 can be set in the CRBT AS104, also can be set in the CSCF102, and can also be set in the calling terminal 101; if the CRBT AS104 Divided into calling CRBT AS1041 and called CRBT AS1042, then CRBT policy analysis unit 107 is set in calling CRBT AS1041 and called CRBT AS1042; if CSCF102 is divided into calling CSCF1021 and called CSCF1022, then CRBT policy analysis unit 107 It is set in the calling CSCF1021 and the called CSCF1022 at the same time.

The CRBT policy configuration unit 106 can also be set in the calling CRBT AS1041 or an entity (such as CRBT management system, user's network address book) that the calling CRBT AS can access, and the CRBT policy analysis unit 107 can be set in the called CRBT AS1042, Either in the called CSCF1022, or in the calling CRBT AS1041.

Referring to Fig. 3, embodiment B2 of the present invention provides a kind of calling terminal, comprises: CRBT policy configuration unit 201, CRBT identification adding unit 202, sending unit 203, wherein, sending unit 203, is used for sending call request, CRBT strategy configuration Unit 201 is used to set the strategy of playing the CRBT, the strategy is the strategy of playing the calling CRBT and the called CRBT, and the CRBT ID adding unit 202 is used to add the calling CRBT ID or the called CRBT ID in the call request according to the playing strategy.

Referring to Fig. 4, embodiment B3 of the present invention provides a kind of CRBT application server, comprises CRBT policy analysis unit 301 and media negotiation unit 302, wherein, CRBT policy analysis unit 301 is used for analyzing the strategy of playing CRBT, according to the playing strategy The calling ring tone or the called ring tone is triggered, and the negotiating unit 302 is configured to perform media negotiation between the calling party and the media resource server determined by the policy according to the analysis result.

Referring to FIG. 5 , embodiment B4 of the present invention provides a call session control function server, including: an authentication unit 401 and a color ring policy analysis unit 402, wherein the authentication unit 401 is configured to The saved terminal identification and the customized relationship of the CRBT service determine whether the terminal user is a CRBT user, and the CRBT strategy analysis unit 402 is used to analyze the strategy of playing the CRBT carried in the call request, and trigger the call signaling of the CRBT user according to the playing strategy. The called CRBT application server or the called CRBT application server.

Referring to Fig. 6, embodiment B5 of the present invention provides a kind of CRBT application server, comprises: CRBT policy configuration unit 501 and media negotiation unit 502, wherein, CRBT policy configuration unit 501 is used for setting the strategy of playing CRBT, and the playing strategy is to play The media negotiation unit 502 is configured to conduct media negotiation between the calling party and the calling or called media resource server determined by the playing policy according to the result of parsing the playing policy.

Referring to Fig. 7, a kind of CRBT application server that the embodiment B6 of the present invention provides, comprises: CRBT policy configuration unit 601, CRBT policy parsing unit 602 and media negotiation unit 603, wherein, CRBT policy configuration unit 601 is used to set the Strategy, the play strategy is the strategy of playing the calling ring back tone or the called ring back tone, and the ring back tone strategy analysis unit 602 is used to analyze the strategy of playing the ring back tone, and triggers the calling ring back tone or the called ring back tone according to the analysis result, and the media negotiation unit 603 uses Perform media negotiation between the calling party and the calling or called media resource server determined by the policy according to the result of parsing the playing policy.

If the CRBT application server is divided into a calling CRBT application server and a called CRBT application server, the CRBT policy configuration unit 601 is located in the calling CRBT application server, and the CRBT policy analysis unit 602 is located in the calling CRBT application server or the called CRBT application server.

Referring to FIG. 8 , embodiment B7 of the present invention provides a calling terminal, including: a sending unit 701, a color ring policy configuration unit 702, and a color ring policy analysis unit 703, wherein the sending unit 701 is used to send a call request, and the color ring policy configuration The unit 702 is used to set the strategy for playing CRBT, the strategy is the strategy of playing the calling CRBT and the called CRBT, and the CRBT policy analysis unit 703 is used for determining the calling and calling MRS according to the strategy of playing the CRBT. Early media negotiation between the MRS or the early media negotiation between the calling and called MRS.

In the above-mentioned embodiments B1 to B7 of the present invention, the calling CSCF and the called CSCF may be the same CSCF or different CSCFs, and the calling CRBT AS and the called CRBT AS may be the same CRBT AS or different CRBTs AS, the calling CRBT management system and the called CRBT management system may be the same CRBT management system or different CRBT management systems. The calling MRS and the called MRS can be the same MRS or different MRSs.

Referring to FIG. 9, embodiment C0 of the present invention provides a method for implementing a multimedia ring back tone service, including:

Step 0001. The calling terminal initiates a call request;

Step 0002. Analyze the strategy of playing the CRBT according to the call request, the strategy of playing the CRBT refers to the strategy of playing the calling CRBT or the called CRBT or the strategy of filtering the CRBT;

Step 0003. Carry out the media negotiation of the calling CRBT or the called CRBT according to the analysis result or not perform the CRBT media negotiation;

Step 0004. After receiving the called ring signal, play the calling ring tone or the called ring tone or not play the ring tone to the calling party according to the media negotiation result.

Before running the above steps, the strategy for playing CRBT needs to be set in advance, which can be set in the calling CRBT AS or in the calling terminal, and the CRBT filtering strategy can also be set in the CRBT filtering AS.

Embodiments C1-C6 of the present invention provide a method for realizing multimedia CRBT service by setting a strategy for playing CRBT in the calling CRBT AS.

Embodiment C7 to embodiment C11 of the present invention provide a method for implementing a multimedia color ring service by setting a strategy for playing color ring in a calling terminal.

Set the strategy for playing CRBT in the calling CRBT AS. The setting method can be customized according to customer needs. You can set the CRBT customized by the calling party to play in any case, that is, the priority of the calling CRBT is higher than that of the called CRBT, and you can also set it to meet the requirements. A certain condition plays the calling CRBT, and a certain condition is met to play the called CRBT. At the same time, different playing conditions corresponding to different calling CRBTs can be set, such as playing different calling CRBTs according to different called parties and different time periods.

The following table is to play different CRBT according to the called party. For callees other than B, C, D, E, F, and G, set as the calling CRBT, a simple example of setting is as follows:

Table 1. User setting table in calling ring back tone AS

The corresponding relationship between the above-mentioned CRBT ID, CRBT number and different conditions can be set in the calling CRBT AS or in an entity (such as the calling CRBT management system) that the calling CRBT AS can access at the same time, or the CRBT ID and number can be identified Set separately, that is, set the corresponding relationship between the CRBT ID and different conditions in the calling CRBT AS, and set the corresponding relationship between the CRBT number and the corresponding conditions in the CRBT management system. Examples C1-C6 of the present invention adopt the settings in Table 1.

The CRBT ID can add a SIP header field or extend a certain header field value or expand SDP to carry this identification information. Specifically, this identification can be set in the Contact header field, such as adding "caller-tone" to the Contact schemes value .

Embodiment C1 of the present invention and Embodiment C2 of the present invention provide a signaling process of "setting an indication at the calling CRBT AS to trigger the identification of the calling CRBT or the called CRBT, and resolving the identification at the called CRBT AS" to adopt early media Take negotiation as an example. The calling party A, the called party B, and the called party H are all multimedia ring back tone users.

Referring to Fig. 10, in the embodiment C1 of the present invention, the calling party A initiates an IMS call to the called party B, and finally plays the calling ring tone 1, and the specific signaling process is as follows:

Step 0101, the calling party sends INVITE signaling, the INVITE signaling carries the identification of the calling terminal, the identification of the called terminal and the normal media SDP (offer1) used by the calling party to establish a call;

The calling CSCF judges that the calling party is a multimedia CRBT user according to the calling terminal ID carried in the INVITE signaling and the custom relationship between the calling terminal ID and the multimedia CRBT service saved by the HSS, and sends the call request to the calling CRBT AS;

Step 0102, the calling CRBT AS finds out that the CRBT corresponding to the called B is "caller-tone" and the CRBT number is "CRBT 1 number" according to the user setting and the terminal identification of the called B, and judges When the calling party A calls the called party B, the calling ring tone 1 is played, and "caller-tone" is added to the INVITE signaling, and step 0109 will also be triggered later;

Step 0103, the calling CRBT AS transmits the INVITE signaling to the called CSCF via the calling CSCF, and the called CSCF according to the called terminal identifier carried in the INVITE signaling and the customized relationship between the called terminal identifier and the multimedia CRBT service saved by the HSS, If it is determined that the called party is a multimedia CRBT user, the INVITE signaling is sent to the called CRBT AS. At this time, the INVITE signaling carries the calling terminal identifier, the called terminal identifier, offer1 and caller-tone;

Step 0104 to step 0105, the called CRBT AS determines not to play the called CRBT according to the "caller-tone" in the INVITE signaling, and sends the INVITE signaling to the called terminal through the called CSCF;

Steps 0106 to 0107: The called terminal performs normal media negotiation according to its own capabilities, and sends a provisional response message to the called CRBT AS through the called CSCF. The response message can be 183 signaling;

The response messages in this embodiment of the present invention and Embodiment C2 of the present invention to Embodiment C11 of the present invention are all represented by 183 signaling;

Step 0108, the called CRBT AS sends a provisional response message to the calling CRBT AS via the called CSCF and the calling CSCF;

Step 0109, because it has been determined in step 0102 that the calling CRBT 1 needs to be played, the calling CRBT AS obtains the early media SDP (offer2) of the calling MRS, and is used for the early media negotiation of the CRBT between the calling party and the calling MRS;

Step 0110, the calling CRBT AS sends 183 signaling to the calling terminal via the calling CSCF, and the signaling carries answer1 and offer2;

Steps 0111 to 0112, the calling terminal performs early media negotiation according to its own capabilities, and sends a temporary reliable response Prack signaling to the calling CRBT AS through the calling CSCF, and the signaling carries the negotiated CRBT early media SDP (answer2);

Step 0113, the calling CRBT AS sends the negotiated CRBT early media SDP (answer2) to the calling MRS;

Step 0114～step 0115, the calling CRBT AS sends the Prack signaling to the called terminal;

Step 0116 to step 0118, the called terminal replies to the calling terminal;

Step 0119 to step 0121, the called terminal rings, and sends a ringing signal 180 to the calling terminal;

Step 0122: After receiving the ringing signal 180, the calling CRBT AS instructs the calling MRS to play the calling CRBT 1 to the calling party;

Step 0123～step 0125, the called party goes off-hook, and the called terminal sends an off-hook signal 200 response to the calling terminal;

Step 0126: After receiving the off-hook signal 200, the calling CRBT AS instructs the calling MRS to finish playing;

There is no specific sequence between the above steps, and there is no sequence between the steps in Examples C2-C11.

In the above embodiment C1, the normal media SDP (answer1) negotiated by the caller and the callee is sent to the caller through the temporary response information 183 signaling, and can also be sent to the caller through 200 (INVITE) in steps 0123 to 0125 .

In step 0101 and step 0103 in the above-mentioned embodiment C1, according to the calling terminal identification carried in the INVITE signaling and the customized relationship between the calling terminal identification and the multimedia ring back tone service saved by the HSS, it is determined that the calling party or the called party is a multimedia ring back tone The user's steps are performed by the calling CSCF or the called CSCF, or by the calling CRBT AS and the called CRBT AS. The relevant authentication steps in the following embodiments C2 to C11 can also be performed by the CRBT AS.

Referring to FIG. 11 , embodiment C2 of the present invention provides that the calling party A initiates an IMS call to the called party H, and finally plays the called party color ring tone. The specific signaling process is as follows:

Step 0201, same as step 0101;

Step 0202: The calling CRBT AS finds out that the CRBT corresponding to the called H is "callee-tone" according to the user settings and the terminal identifier of the called H, and determines that when the calling A calls the called B When playing the called ringtone, add "callee-tone" to the INVITE signaling;

Step 0203, the calling CRBT AS sends the INVITE signaling to the called CSCF via the calling CSCF, and the called CSCF according to the called terminal identifier carried in the INVITE signaling and the customized relationship between the called terminal identifier and the multimedia CRBT service saved by the HSS, Judging that the called party is a multimedia CRBT user, the INVITE signaling is sent to the called CRBT AS. At this time, the INVITE signaling carries the calling terminal identifier, the called terminal identifier, the normal media SDP (offer1 ) and "callee-tone";

Steps 0204 to 0205, the called CRBT AS determines to play the called CRBT according to the "callee-tone" in the INVITE signaling, and sends the INVITE signaling to the called terminal through the called CSCF;

Step 0206 ~ step 0207, the same as step 0106 ~ step 0107;

Step 0208, because it has been determined in step 0202 that the called CRBT needs to be played, the called CRBT AS obtains the early media SDP (offer2) of the called MRS;

Steps 0209 to 0210, the called CRBT AS sends 183 signaling to the calling terminal via the called CSCF, calling CSCF, and calling CRBT AS, wherein the 183 signaling carries the negotiated normal media SDP (answer1) and offer2;

Step 0211, the calling terminal performs early media negotiation of CRBT according to its own capabilities;

Steps 0212 to 0213, the calling terminal sends the temporary reliable response Prack signaling to the called CRBT AS via the calling CSCF and the called CSCF, and the signaling carries the negotiated CRBT early media SDP (answer2);

Step 0214, the called CRBT AS sends the negotiated CRBT early media SDP (answer2) to the called MRS;

Step 0215, the called CRBT AS sends the Prack signaling to the called terminal;

Step 0216-step 0221, the same as step 0116-0121;

Step 0222: After receiving the ringing signal 180, the called CRBT AS instructs the called MRS to play the tone to the calling party;

Step 0223 to step 0225, same as step 0123 to step 0125;

Step 0226: After receiving the off-hook signal 200, the called CRBT AS instructs the called MRS to stop playing;

The called H in the embodiment of the present invention C2 is a multimedia CRBT user, if the called H does not subscribe to the multimedia CRBT service, there are two processing methods:

Solution 1: Play a traditional ringback tone to the caller.

Processing method two: playing the calling ringback tone, the specific processing method is the same as the embodiment shown in Figs. 26, 27 and 28.

Embodiment C3 of the present invention and Embodiment C4 of the present invention provide a signaling process of "setting an indication at the calling CRBT AS to trigger the identification of the calling CRBT or the called CRBT, and parsing the identification at the called CSCF" to adopt early media negotiation as an example. The calling party A, the called party C, and the called party J involved are all multimedia ring back tone users.

Referring to Fig. 12, embodiment C3 of the present invention provides that the calling party A initiates an IMS call to the called party D, and finally plays the calling ring tone. The specific signaling process is as follows:

Steps 0301 to 0302 are the same as steps 0101 to 0102, because in step 0302 the calling CRBT AS has identified the "caller tone" in the INVITE signaling, and subsequently triggers step 0309: the calling CRBT AS acquires the early media of the calling MRS SDP(offer2);

Steps 0303 to 0304: The calling CRBT AS sends the INVITE signaling to the called CSCF via the calling CSCF, and the called CSCF uses the called terminal ID carried in the INVITE signaling and the called terminal ID stored in the HSS and the multimedia CRBT service Customize the relationship, determine that the called party is a multimedia CRBT user, and the called CSCF determines not to play the called CRBT according to the "caller-tone" in the INVITE signaling,

Step 0305: The called CSCF directly sends the INVITE signaling to the called terminal. At this time, the INVITE signaling carries the identification of the calling terminal, the identification of the called terminal, offer1 and caller-tone;

Step 0306 to step 0326 are the same as step 0106 to step 0126.

Referring to Fig. 13, embodiment C4 of the present invention provides that calling party A initiates an IMS call to called party I, and finally plays the called party color ring tone, and the specific signaling process is as follows:

Step 0401 ~ step 0403, the same as step 0201 ~ step 0203;

Step 0404, the called CSCF determines to play the called ring tone according to the "callee-tone" in the INVITE signaling;

Step 0405. The called CSCF sends the INVITE signaling to the called CRBT AS. At this time, the INVITE signaling carries the calling terminal ID, called terminal ID, offer1 and callee-tone. The called CRBT AS uses the ID "callee-tone "Subsequent triggering step 0409: Obtain the early media SDP (offer2) of the called MRS;

Step 0406-step 0432, same as step 0205-step 0226.

Embodiment C5 of the present invention and Embodiment C6 of the present invention provide a signaling process of "setting an indication on the calling CRBT AS to trigger the identification of the calling CRBT or the called CRBT, and the calling CRBT AS resolves the identification" to adopt early media Take negotiation as an example. The calling party A, the called party D, and the called party K involved are all multimedia ring back tone users.

Referring to Fig. 14 , embodiment C5 of the present invention provides the flow of calling A to callee D to initiate an IMS call, and finally playing the caller's CRBT. The signaling flow is as follows:

Step 0501, same as step 0101

Step 0502: The calling CRBT AS finds out that the corresponding CRBT ID is "caller tone" and the CRBT number is "CRBT 1 number" according to the user settings and the terminal ID of the called D, and determines that when the calling party A calls the called D Play calling ringtone 1;

Step 0503, the calling CRBT AS sends the INVITE signaling to the called CSCF via the calling CSCF, and the called CSCF according to the called terminal identifier carried in the INVITE signaling and the customized relationship between the called terminal identifier and the multimedia CRBT service saved by the HSS, If it is determined that the called party D is a multimedia ring back tone user, the INVITE signaling is sent to the called ring back tone AS;

Step 0504, the called CRBT AS obtains the early media SDP (offer2) of the called MRS;

Step 0505: The called CRBT AS sends the INVITE signaling to the called terminal through the called CSCF. At this time, the INVITE signaling carries the identification of the calling terminal, the identification of the called terminal, and the normal media SDP (offer1 );

Steps 0506 to 0507, the called terminal performs normal media negotiation according to its own capabilities, and sends 183 signaling to the called CRBT AS through the called CSCF, and the signaling carries the normal media SDP (answer1) negotiated by the calling party and the called party;

Step 0508: The called CRBT AS sends 183 signaling to the calling CRBT AS via the called CSCF and the calling CSCF. The 183 signaling carries the normal media SDP (answer1) negotiated by the calling party and the called party and the early media of the called MRS SDP(offer2);

You can add a service ID or set the corresponding media attribute mark in offer2, indicating that this is the SDP for the called ring back tone service, and you can extend the m line to describe the media type as "called ring back ring". The example is as follows:

m=application 2456 TCP callee-tone

Step 0509, the calling CRBT AS obtains the early media SDP (offer3) of the calling MRS, which is used for the early media negotiation of the CRBT between the calling party and the calling MRS;

Step 0510, the calling CRBT AS replaces the early media SDP (offer2) of the called MRS in the 183 signaling with the early media SDP (offer3) of the calling MRS, and sends the 183 signaling to the calling terminal via the calling CSCF, The signaling carries the negotiated normal media SDP (answer1) and the early media SDP (offer3) of the calling MRS;

Steps 0511 to 0512, the calling terminal performs early media negotiation according to its own capabilities, and sends a temporary reliable response Prack signaling to the calling CRBT AS through the calling CSCF, and the signaling carries the negotiated CRBT early media SDP (answer3);

Step 0513, the calling CRBT AS sends the negotiated CRBT early media SDP (answer3) to the calling MRS;

Step 0514 ~ Step 0515, the calling CRBT AS replaces the calling party and conducts media negotiation with the called MRS, you can set the calling terminal port to 0 in answer2, or modify the media direction attribute to indicate only sending but not receiving media stream "sendonly";

Step 0516-step 0527, same as step 0115-step 0126.

Referring to Fig. 15 , embodiment C6 of the present invention provides the process of calling A to callee K to initiate an IMS call, and finally playing the process of called CRBT. The specific signaling process is as follows:

Step 0601, same as step 0101;

Step 0602, the calling CRBT AS detects that the corresponding CRBT identifier is "callee tone" according to the user setting and the terminal identifier of the called K, and determines that the called CRBT is played when the calling A calls the called K;

Step 0603 ~ Step 0608, same as Step 0503 ~ Step 0508

Step 0609, the calling CRBT AS sends 183 signaling to the calling terminal via the calling CSCF, and the signaling carries the normal media SDP (answer1) after negotiation and the early media SDP (offer2) of the called MRS;

Step 0610, the calling terminal performs early media negotiation according to its own capabilities;

Step 0611 to step 0625 are the same as step 0212 to step 0225.

Embodiments C7 to C11 of the present invention provide that the calling terminal A is set to listen to the color ring that meets the setting conditions. The priority of the calling CRBT is higher than that of the called CRBT, and it can also be set to play the calling CRBT if certain conditions are met, and the called CRBT to play if certain conditions are met.

The following table is the settings, which play different ring tones according to the callee. The simple example of the settings is as follows:

condition CRBT logo Called b, c, d caller tone other called callee tone

Table 2. User setting table in the calling terminal

The CRBT ID can add a SIP header field or extend a certain header field value or expand SDP to carry this identification information. Specifically, this identification can be set in the Contact header field, such as adding "caller-tone" to the Contact schemes value .

The calling party A, the called party b, and the called party e involved in the embodiment C7 of the present invention and the embodiment C8 of the present invention are all multimedia CRBT users, "the calling terminal sets an indication in the call request to trigger the calling CRBT The calling CRBT AS and the called CRBT AS resolve the identifier in the call request".

Referring to Fig. 16 , embodiment C7 of the present invention provides a process in which the calling party A initiates an IMS call to the called party b, and finally plays the caller's CRBT. The specific signaling process is as follows:

Step 0701, the calling party finds out that the color ring tone corresponding to the called party b is "caller tone" according to the user setting and the terminal identification of the called party b, and judges that the calling party's color ring tone is played when the calling party A calls the called party b, and sets "callertone "Added in the INVITE signaling;

Step 0702: The calling party sends the INVITE signaling to the calling CSCF, and the calling CSCF determines that the calling party A is a multimedia service according to the calling terminal ID in the INVITE signaling and the customized relationship between the calling terminal ID and the multimedia service saved by the HSS. A CRBT user, so the calling CSCF sends the INVITE signaling to the calling CRBT AS. The INVI TE signaling carries the calling terminal ID, the called terminal ID, the normal media SDP (offer1) used by the calling party to establish a call, and "caller tone";

Step 0703, the calling CRBT AS judges to play the calling CRBT according to the "caller tone" in the INVITE signaling, and then triggers the calling CRBT process, that is, initiates Step 0710: the calling CRBT AS obtains the early media SDP (offer2) of the MRS;

Step 0704, the calling CRBT AS sends the INVITE signaling to the calling CSCF and the called CSCF, and the called CSCF determines the The called party is a multimedia CRBT user, so the called CSCF sends the INVITE signaling to the called CRBT AS;

Step 0705, the called CRBT AS judges to play the calling CRBT according to the "caller tone" in the INVITE signaling, so the called CRBT process is not triggered;

Step 0706-step 0727, same as step 0105-step 0126.

If the called party in the above-mentioned embodiment of the present invention is b', and b' is a non-multimedia CRBT user, the signaling flow is as above, the difference is that in step 0704, the called CSCF according to the called terminal ID and HSS in the INVITE signaling The saved customized relationship between the called terminal identifier and the multimedia service determines that the called party b' is a non-multimedia CRBT user, so the called CSCF directly sends the INVITE signaling to the called party; therefore, there is no step 0705, and the remaining steps are as in the present invention Embodiment C7, that is, if the called party is a non-multimedia CRBT user, the setting is resolved as "the calling terminal sets an indication in the call request to trigger the identification of the calling CRBT or the called CRBT, and the calling CRBT AS parses the identification in the call request ".

Referring to FIG. 17 , embodiment C8 of the present invention provides a process in which the calling party A initiates an IMS call to the called e, and finally plays the callee's CRBT. The specific signaling process is as follows:

Step 0801, the calling party finds out that the color ring tone corresponding to the called party b is "callee tone" according to the user setting and the terminal identification of the called party b, judges that the called party color ring tone is played when the calling party A calls the called party b, and sets the "callee tone" tone" added in the INVITE signaling;

Step 0802: The calling party sends the INVITE signaling to the calling CSCF, and the calling CSCF determines that the calling party A is a multimedia service according to the calling terminal ID in the INVITE signaling and the customized relationship between the calling terminal ID and the multimedia service saved by the HSS. CRBT user, so the calling CSCF sends the INVITE signaling to the calling CRBT AS. The INVI TE signaling carries the calling terminal ID, the called terminal ID, the normal media SDP (offer1) used by the calling party to establish a call, and "callee tone";

Step 0803, the calling CRBT AS judges to play the called CRBT according to the "callee tone" in the INVITE signaling, so the calling CRBT process is not triggered;

Step 0804, same as step 0704;

Step 0805: The called CRBT AS determines to play the called CRBT according to the "callee tone" in the INVITE signaling, and then triggers the called CRBT process, that is, initiates Step 0809: The called CRBT AS obtains the early media SDP (offer2 );

Step 0806-step 0827, same as step 0805-step 0826.

The calling party A, the called party c, and the called party f involved in embodiment C9 of the present invention and embodiment C10 of the present invention are all multimedia CRBT users, "the calling terminal sets an indication in the call request to trigger the calling CRBT or the called CRBT The identification of the calling CSCF and the called CSCF resolve the identification in the call request".

Referring to FIG. 18 , embodiment C9 of the present invention provides a process in which the calling party A initiates an IMS call to the called party c, and finally plays the caller's CRBT. The specific signaling process is as follows:

Step 0901, same as step 0701;

Step 0902, the calling INVITE signaling is sent to the calling CSCF, and the INVITE signaling carries the calling terminal identifier, the called terminal identifier, the normal media SDP (offer1) and "caller tone" used by the calling party to establish a call;

Steps 0903 to 0904, the calling CSCF judges that the calling party is a multimedia ring back tone user according to the calling terminal identification carried in the INVITE signaling and the customized relationship between the calling terminal identification and the multimedia ring back tone service saved by the HSS, and according to the calling terminal identification in the INVITE signaling The "caller tone" judges that the calling CRBT will be played, so the INVITE signaling is triggered to the calling CRBT AS, followed by step 0911: the calling CRBT AS obtains the early media SDP (offer2) of the MRS;

Step 0905, the calling CRBT AS sends the INVITE signaling to the called CSCF via the calling CSCF;

Step 0906～step 0907, the called CSCF judges to play the calling ring tone according to the "caller tone" in the INVITE signaling, and then directly sends the INVITE signaling to the called party;

Step 0908 to step 0933 are the same as step 0106 to step 0126.

Referring to FIG. 19 , embodiment C10 of the present invention provides a process in which the calling party A initiates an IMS call to the called party f, and finally plays the called party's CRBT. The specific signaling process is as follows:

Step 1001, same as step 0801;

Steps 1002 to 1004, the calling INVITE signaling is sent to the calling CSCF, and the INVITE signaling carries the calling terminal identifier, the called terminal identifier, the normal media SDP (offer1) and "callee tone" used by the calling party to establish a call , the calling CSCF judges to play the called CRBT according to the "callee tone" in the INVITE signaling, and then directly sends the INVITE signaling to the called CSCF;

Step 1005, the called CSCF judges that the called party is a multimedia ring back tone user according to the called terminal identifier carried in the INVITE signaling and the customized relationship between the called terminal identifier and the multimedia ring back tone service saved by the HSS, and according to the "callee tone" in the INVITE signaling "It is judged to play the called CRBT, so the INVITE signaling is triggered to the called CRBT AS, and then the called CRBT AS obtains the early media SDP (offer2) of the called MRS;

Step 1006 to step 1033 are the same as step 0205 to step 0226.

Both the calling party A and the called party d involved in the embodiment C11 of the present invention are multimedia CRBT users, and the policy of triggering the calling CRBT or the called CRBT is set in the calling terminal, and the calling terminal analyzes the policy to determine the calling early Media negotiation or called early media negotiation.

Referring to FIG. 20 , embodiment C11 of the present invention provides a process in which the calling party A initiates an IMS call to the called party d, and finally plays the caller's CRBT. The specific signaling process is as follows:

Step 1101, the calling party sends INVITE signaling, and the INVITE signaling carries the identification of the calling terminal, the identification of the called terminal and the normal media SDP (offer1) used by the calling party to establish a call;

The calling CSCF judges that the calling party is a multimedia CRBT user according to the calling terminal ID carried in the INVITE signaling and the custom relationship between the calling terminal ID and the multimedia CRBT service saved by the HSS, and sends the call request to the calling CRBT AS;

Step 1102, the calling CRBT AS sends the INVITE signaling to the called CSCF via the calling CSCF, and the called CSCF according to the called terminal identifier carried in the INVITE signaling and the customized relationship between the called terminal identifier and the multimedia CRBT service saved by the HSS, If it is determined that the called party is a multimedia CRBT user, the INVITE signaling is sent to the called CRBT AS. At this time, the INVITE signaling carries the identification of the calling terminal, the identification of the called terminal, and offer1;

Step 1103, the called CRBT AS sends the INVITE signaling to the called terminal through the called CSCF;

Steps 1104 to 1105, the called terminal performs normal media negotiation according to its own capabilities, and sends a provisional response message to the called CRBT AS through the called CSCF, and the signaling carries the normal media SDP (answer1) negotiated by the calling and called parties. The response message can be 183 signaling;

Step 1106, the called CRBT AS obtains the early media SDP (offer2) of the called MRS, which is used for the early media negotiation of the CRBT between the calling and called MRSs;

Step 1107, the called CRBT AS sends a provisional response message to the calling CRBT AS via the called CSCF and the calling CSCF;

Step 1108, the calling CRBT AS obtains the early media SDP (offer3) of the calling MRS, which is used for the early media negotiation of the CRBT between the calling party and the calling MRS;

Step 1109, the calling CRBT AS sends a temporary response message to the calling terminal through the calling CSCF, and the temporary response message carries answer1, offer2, and offer3;

Step 1110～step 1111, the calling terminal judges that the calling ring tone should be played when the called party is d according to the user setting and the terminal identification of the called party d, so the calling terminal carries out the calling ring tone early media negotiation (after negotiation The SDP is answer3), and at the same time reject the early media negotiation of the called CRBT, you can set the calling terminal port to 0 in answer2, or modify the media direction attribute to "sendonly" that means only sending but not receiving media stream;

Step 1112, the calling terminal sends the temporary reliable response Prack signaling to the calling CRBT AS through the calling CSCF, and the signaling carries the negotiated calling CRBT early media SDP (answer3) and called CRBT early media negotiation (answer2) ;

Step 1113, the calling CRBT AS sends the negotiated calling CRBT early media SDP (answer3) to the calling MRS;

Step 1114, the calling CRBT AS sends the Prack signaling to the called CRBT AS via the calling CSCF and the called CSCF, and the signaling carries the called CRBT early media negotiation (answer2);

Step 1115, the called CRBT AS sends the negotiated called CRBT early media SDP (answer2) to the called MRS;

Step 1116 to step 1127 are the same as step 0115 to step 0126.

The entities on the network side in Embodiment C1 of the present invention to Embodiment C11 of the present invention include calling CRBT AS, calling CRBT management system, calling CSCF, calling MRS, called CRBT AS, called CRBT management system, called CSCF, called MRS. For the sake of brevity, Figures 1 to 10 only show some of the entities.

The corresponding entities of the calling and called parties can also be the same entity, for example, the calling CSCF and the called CSCF may be the same CSCF, the calling CRBT AS and the called CRBT AS may be the same CRBT AS, the calling CRBT management system and the called CRBT management system It may also be the same CRBT management system. The present invention only provides the embodiment of the present invention in which the corresponding entities are different entities, and the case of the same entity can be deduced by analogy.

In actual deployment, instead of judging at the CSCF whether the user has subscribed to the CRBT service, the CRBT AS is directly triggered, and the CRBT AS determines whether the user has subscribed to the CRBT service and performs subsequent operations. The process is similar to and simpler than that of the above-mentioned embodiment.

The technical solution provided by the embodiments of the present invention above can realize the calling ring back tone service in the IMS field. When both the calling user and the called user are multimedia ring back ring users, the calling user can be provided with the calling ring ring service or Called CRBT service.

The calling user can also set CRBT filtering. If the calling and called CRBT service is deployed at the same time, the user can set to filter the calling and/or called CRBT. If the called CRBT is filtered, the calling CRBT will be played; Called CRBT, if the calling and called CRBT are filtered at the same time (that is, the CRBT set by the called party is not listened to, and the calling CRBT is not listened to), then the calling terminal directly plays the stored multimedia.

The CRBT filtering policy can be set in the calling terminal or the CRBT filtering AS or the calling CRBT AS, and can also be set in an entity (such as CRBT management system, user's network address book) that the calling CRBT AS can access. Call CRBT together, be set in the user setting table similar to Table 1, for example, as Table 3, calling user A is set when being called as user J or user K, carry out CRBT filtering (simultaneously filter calling and called CRBT); When the called user is B, C, D, E, F, G, play the calling CRBT (equivalent to filtering the called CRBT); when the called is another user, play the called CRBT (equal to filtering the calling CRBT):

table 3

When the calling CRBT service is not carried out, the CRBT filtering service can also be carried out solely based on the called CRBT service, and the user can set filtering policies for specific called parties or specific time periods to decide whether to filter the CRBT.

Embodiment C12 describes this scenario. At this time, the calling side does not need to have a calling CRBT AS and a calling MRS, but has a CRBT filtering AS, and the CRBT filtering policy is set in the CRBT filtering AS, and the CRBT filtering AS is added in the Invite ID (CRBT filtering ID), the called CRBT AS parses the ID to determine whether to execute the CRBT process. As shown in Figure 21, the specific signaling process of embodiment C12 is as follows:

Step 1201, the calling party sends INVITE signaling, and the INVITE signaling carries the identification of the calling terminal, the identification of the called terminal and the normal media SDP (offer1) used by the calling party to establish a call;

The calling CSCF judges that the calling party has subscribed to the multimedia CRBT filtering service based on the calling terminal ID carried in the INVITE signaling and the customized relationship between the calling terminal ID and the multimedia CRBT filtering service stored in the HSS, and sends the call request to the CRBT filtering AS ;

Step 1202, the color ring filtering AS judges whether to filter the color ring according to the user setting and the terminal identification of the called B, if not, handle it according to the existing call flow, if yes, add the color ring filter identifier "filter-tone" in the INVITE signaling ;

Step 1203, the CRBT filtering AS sends the INVITE signaling to the called CSCF via the calling CSCF, and the called CSCF judges according to the called terminal identifier carried in the INVITE signaling and the customized relationship between the called terminal identifier and the multimedia CRBT service saved by the HSS If the called party is a multimedia CRBT user, the INVITE signaling is sent to the called CRBT AS. At this time, the INVITE signaling carries the identification of the calling terminal, the identification of the called terminal, offer1 and filter-tone;

Steps 1204 to 1205, the called CRBT AS judges to filter the called CRBT according to the "filter-tone" in the INVITE signaling, does not trigger the CRBT process, and sends the INVITE signaling to the called terminal through the called CSCF;

Steps 1206 to 1207, the called terminal performs normal media negotiation according to its own capabilities, and sends a provisional response message to the called CRBT AS through the called CSCF, and the signaling carries the normal media SDP (answer1) negotiated by the calling party and the called party. The response message can be 183 signaling;

Step 1208, the called CRBT AS sends a provisional response message to the CRBT filtering AS via the called CSCF and the calling CSCF;

Step 1209, the CRBT filtering AS sends 183 signaling to the calling terminal via the calling CSCF, and the signaling carries answer1;

Step 1210, the calling terminal sends the temporary reliable response Prack signaling to the CRBT filtering AS through the calling CSCF;

Step 1211～step 1212, the CRBT filtering AS sends the Prack signaling to the called terminal;

Step 1213 to step 1215, the called terminal replies to the calling terminal;

Step 1216-step 1218, the called terminal rings, and sends a ringing signal 180 to the calling terminal;

Step 1219, the calling terminal plays the multimedia stored by itself;

Steps 1220 to 1222, the called terminal picks up the phone, and the called terminal sends an off-hook signal 200 response to the calling terminal, and the calling terminal stops playing multimedia after receiving it.

In the above embodiment, the called CRBT AS judges whether to trigger the called CRBT process, and the called CSCF can also judge whether to trigger the called CRBT AS, as shown in FIG. 22 , the difference between the C13 and C12 embodiments of the present invention is that After receiving the INVITE signaling, the called CSCF directly judges to filter the called CRBT according to the "filter-tone" identifier in the INVITE signaling, does not trigger the CRBT AS, and sends the INVITE signaling to the called terminal;

Another embodiment of the present invention is that when the CRBT filter AS determines that CRBT needs to be filtered, it does not add the "filter-tone" identifier to the INVITE signaling sent, but rejects the CRBT media negotiation after receiving the CRBT early media offer Or perform negotiation on some media types, specifically as shown in Figure 23, including:

Step 1401, same as step 1201

Step 1402, the color ring filtering AS judges whether to filter the color ring according to the user setting and the terminal identification of the called B;

Step 1403, the CRBT filtering AS sends the INVITE signaling to the called CSCF via the calling CSCF, and the called CSCF judges according to the called terminal identifier carried in the INVITE signaling and the customized relationship between the called terminal identifier and the multimedia CRBT service saved by the HSS If the called party is a multimedia CRBT user, the INVITE signaling is sent to the called CRBT AS;

Step 1404, the called CRBT AS obtains the early media SDP (offer2) of the called MRS;

Step 1405, the called CRBT AS sends the INVITE signaling to the called terminal through the called CSCF. At this time, the INVITE signaling carries the calling terminal identifier, the called terminal identifier and the normal media SDP (offer1 );

Steps 1406 to 1407, the called terminal performs normal media negotiation according to its own capabilities, and sends 183 signaling to the called CRBT AS through the called CSCF, and the signaling carries the normal media SDP (answer1) negotiated by the calling party and the called party;

Step 1408, the called CRBT AS sends 183 signaling to the CRBT filtering AS via the called CSCF and the calling CSCF, and the 183 signaling carries the normal media SDP (answer1) negotiated by the calling party and the called party and the early media SDP of the called MRS (offer2);

Step 1409, the CRBT filtering AS judges whether to filter the CRBT according to user settings and the terminal identification of the called B, and if so, delete offer2 in the 183 signaling forwarded to the calling terminal;

Step 1410, the CRBT filtering AS sends the 183 signaling to the calling terminal via the calling CSCF, and the signaling carries normal media SDP (answer1);

Step 1411, the calling terminal sends the temporary reliable response Prack signaling to the CRBT filtering AS through the calling CSCF;

Step 1412, the CRBT filtering AS sets the calling terminal port to 0 in answer2, indicating that the early media negotiation of CRBT is rejected, and sends the prack signaling carrying answer2 to the CRBT AS;

Step 1413, the CRBT AS sends answer2 to the media resource server MRS

Step 1414 to step 1423 are the same as step 1212 to step 1218 and step 1220 to step 1222.

The CRBT filtering strategy can also be set in the calling terminal. When the calling terminal initiates a call, it is judged whether the CRBT needs to be filtered according to the CRBT filtering strategy, and if necessary, the filtering identifier "filter-tone" is added to the INVITE signaling; if If not required, do not add. Similar to embodiment C12, the called CRBT AS judges to filter the called CRBT according to the "filter-tone" in the INVITE signaling, and does not trigger the CRBT process. Similar to the embodiment C13, the called CSCF may determine to filter the called ringtone according to the "filter-tone" in the INVITE signaling, and not trigger the ringtone AS.

Another embodiment of the present invention is that the CRBT filtering strategy is set in the calling terminal without changing the network processing flow. After the calling terminal receives the CRBT early media offer, it rejects the CRBT when judging that CRBT filtering is required according to the CRBT filtering policy Media negotiation can be achieved by setting the calling port to 0 in the returned answer2, or the CRBT media negotiation can be carried out normally but the media channel is refused to open or the CRBT is refused to play.

An embodiment of a server of the present invention is shown in Figure 24, including:

a receiving unit, configured to receive a call request initiated by the calling terminal;

a judging unit, configured to judge whether it is necessary to filter the ring tone according to the call request;

a filtering unit, which filters the ring tone according to the judgment result;

The policy unit is used to store the CRBT filtering policy, and the server also judges that the CRBT needs to be filtered according to the stored CRBT filtering policy.

An embodiment of a terminal of the present invention is shown in Figure 25, including:

Transceiving unit: used to initiate a call request and receive an early media negotiation request for CRBT;

A policy unit, used to store the ring back tone filtering policy;

The filtering unit is configured to judge whether to filter the CRBT according to the stored CRBT filtering strategy, and reject the CRBT media negotiation, or refuse to play the CRBT, or refuse to open the media channel according to the judgment result.

In addition, in the user settings shown in Table 1, the user can also make such a setting: if there is a called ring tone, then choose to receive the called ring tone; otherwise, receive the calling ring tone. Since the calling domain cannot know whether the called party has subscribed to the CRBT service, the calling CRBT AS cannot judge whether to start the CRBT process when initially receiving the call request, and the calling CRBT AS responds by judging the call request returned by the called side. , judge whether there is a called CRBT according to the SDP type of the response and the P-early-media header field, or implement by carrying the CRBT identifier in the call request response after the called CRBT AS triggers the CRBT process. In the following, three specific embodiments are used for illustration.

The embodiment shown in Figure 26 is that the called CRBT server adopts the AS mode to realize CRBT, including steps:

2601. The calling party initiates a call request, which triggers the calling ring tone AS;

2602. The calling CRBT AS checks the calling CRBT priority setting, and temporarily does not start the CRBT process;

2603. If the called party has subscribed to the called party's CRBT, the call request is triggered to the called party's CRBT AS; in this embodiment, it is assumed that the called party has subscribed to the called party's CRBT.

2604-2605. The called CRBT AS forwards the call request to the called party, and the called party returns a 183 provisional response;

2606. The called CRBT AS starts the AS mode called CRBT process;

2607. The called CRBT AS sends a 183 response with an early-session SDP to the calling CRBT AS;

2608. The calling CRBT AS determines that the called party has a CRBT according to the early-session SDP carried in the 183 response, and therefore does not start the calling CRBT procedure. If the early-session SDP is not carried, it is considered that there is no called ring tone, so the calling ring tone is activated;

2609-2616. Complete media negotiation on called CRBT;

2617-2620. The called party returns a 180 response to the calling party, and the called CRBT AS plays the CRBT to the calling party;

2621. The called party answers the call, the called CRBT AS stops playing the CRBT, and the calling party and the called party start talking.

The embodiment shown in Figure 27 is that the called CRBT server adopts the gateway mode supporting P-early-media to realize CRBT, including steps:

2701. The calling party initiates a call request, which triggers the calling ring tone AS;

2702. The calling CRBT AS checks the calling CRBT priority setting, and temporarily does not start the CRBT process;

2703. If the called party has subscribed to the called party's CRBT, the call request is triggered to the called party's CRBT AS; in this embodiment, it is assumed that the called party has subscribed to the called party's CRBT.

2704-2705. The called CRBT AS forwards the call request to the called party, and the called party returns a 183 provisional response;

2706. The called CRBT AS starts the gateway mode called CRBT process;

2707. The called CRBT AS sends a 183 response with the P-early-media header field to the calling CRBT AS;

2708. The calling CRBT AS determines that the called party has a CRBT according to the P-early-media header field carried in the 183 response, and therefore does not start the calling CRBT procedure. If the P-early-media header field is not carried, it is considered that there is no called CRBT, so the calling CRBT is activated;

2709-2715. Complete media negotiation on called CRBT;

2716-2719. The called party returns a 180 response to the calling party, and the called CRBT AS plays the CRBT to the calling party.

2720. The called party answers the call, the called CRBT AS stops playing the CRBT, and the calling and called parties start talking.

The embodiment shown in Figure 28 is that the called CRBT server starts the CRBT process and then adds the CRBT identifier to realize the CRBT, including steps:

2801. The calling party initiates a call request, which triggers the calling ring tone AS;

2802. The calling CRBT AS checks the calling CRBT priority setting, and temporarily does not start the CRBT process;

2803. If the called party has subscribed to the called party's CRBT, the call request is triggered to the called party's CRBT AS; in this embodiment, it is assumed that the called party has subscribed to the called party's CRBT.

2804-2805. The called CRBT AS forwards the call request to the called party, and the called party returns a 183 provisional response;

2806. The called CRBT AS starts the AS mode called CRBT process;

2807. The called CRBT AS sends a 183 response with the called CRBT identifier to the calling CRBT AS;

2808. The calling CRBT AS determines that the called party has a CRBT according to the called CRBT identifier carried in the 183 response, and therefore does not start the calling CRBT process. If the called CRBT is not carried, it is considered that there is no called CRBT, so the calling CRBT is activated;

2809-2816. Complete media negotiation on called CRBT;

2817-2820. The called party returns a 180 response to the calling party, and the called CRBT AS plays the CRBT to the calling party;

2821. The called party answers the call, the called CRBT AS stops playing the CRBT, and the calling party and the called party start talking.

In order to realize the above embodiment, the present invention also provides a color ring back tone AS, as shown in FIG. 29 , including:

The transceiver unit is configured to receive a call request initiated by the calling terminal, send the call request to the called party, and receive a call response message returned by the called party;

The policy unit is used to save the policy of playing the ring tone;

The playing unit is used for the user to play the calling ring tone or the called ring tone to the calling terminal according to the playing color ring tone strategy and the call response message.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies thereof, the present invention also intends to include these modifications and variations.

Claims (12)

1. a method that realizes that multimedia color ring back tone filters is characterized in that, comprising:

Receive the call request that calling terminal is initiated;

Judge whether that according to said call request needs filter CRBT;

Filter CRBT according to judged result.

2. the method for claim 1 is characterized in that, said filtration CRBT is the filtering main call CRBT and/or filters CRBT service provided to the called party.

3. according to claim 1 or claim 2 method; It is characterized in that; Comprise CRBT in the said call request and filtered sign; Judge whether that according to said CRBT filtration sign needs filter CRBT, it is that the terminal is added in the said call request according to the CRBT filtering policy of storing that said CRBT filters sign.

4. method as claimed in claim 3 is characterized in that, saidly filters sign according to CRBT and judges whether that needs filter CRBT and specifically comprise: the CRBT application server AS is filtered sign according to said CRBT and is judged whether to carry out the CRBT flow process; Perhaps, CSCF server CSCF filters sign according to said CRBT and judges whether to be triggered to the CRBT application server AS.

5. the method for claim 1; It is characterized in that; Saidly judge whether that according to call request needs filter CRBT and specifically comprise: CRBT filters AS and judges needs filtration CRBT according to the CRBT filtering policy of call request and storage; In the call request of transmitting, add CRBT and filter sign, CRBT application server AS or CSCF server CSCF filter sign according to said CRBT and judge whether that needs filter CRBT.

6. method as claimed in claim 5; It is characterized in that said CRBT application server AS or CSCF server CSCF filter sign according to CRBT and judge whether that needs filter CRBT and specifically comprise: the CRBT application server AS is filtered sign according to said CRBT and judged whether to carry out the CRBT flow process; Perhaps, CSCF server CSCF filters sign according to said CRBT and judges whether to be triggered to the CRBT application server AS.

7. the method for claim 1 is characterized in that, saidly judges whether that according to call request needs filter CRBT and are specially: CRBT filtration applications server A S judges whether needs filtration CRBT according to the CRBT filtering policy of said call request and storage; Saidly filter CRBT according to judged result and be specially: according to judged result refusal CRBT early media negotiation.

8. like claim 5 or 6 described methods, it is characterized in that said CRBT filtration applications server A S is the CRBT service provided to the calling party application server AS.

9. a method that realizes that multimedia color ring back tone filters is characterized in that, comprising:

The calling terminal request of making a call receives the request of CRBT early media negotiation;

CRBT filtering policy according to storage judges whether that needs filter CRBT;

According to judged result refusal CRBT media negotiation, or the refusal coloring ring back tone playing, or refusal is opened media channel.

10. a server is characterized in that, comprising:

Receiving element is used to receive the call request that calling terminal is initiated;

Judging unit is used for judging whether that according to said call request needs filter CRBT;

Filter element filters CRBT according to judged result.

11. server as claimed in claim 10 is characterized in that, also comprises:

Policy unit is used to store the CRBT filtering policy, and server also filters CRBT according to the CRBT filtering policy judgement needs of storage.

12. a terminal is characterized in that, comprising:

Transmit-Receive Unit, the request that is used to make a call receives the request of CRBT early media negotiation;

Policy unit is used to store the CRBT filtering policy;

Filter element is used for judging whether that according to the CRBT filtering policy of storage needs filter CRBT, according to judged result refusal CRBT media negotiation, or the refusal coloring ring back tone playing, or refusal is opened media channel.

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