WO2020073999A1 - Method for controlling video ringing playback and related apparatus - Google Patents

Abstract

Disclosed in embodiments of the present invention are a method for controlling video ringing playback and a related apparatus. The method comprises: a calling party device sends a call request message to a ringing server; after receiving the request message, the ringing server sends a call answering message to the calling party device; the calling party device negotiates audio/video media with the ringing server, and plays the video ringing after the negotiation. The ringing server and the calling party device can inform a calling party of the call state, and the call state can be displayed in the video ringing in the form of subtitle by means of video synthesis. The embodiments of the present invention provide a method for playing video ringing in the process of paging a called party, prolonging the time of video ringing playback and improving user experience of video ringing.

Description

Method and related device for controlling video color ring back tone

This application requires the priority of the Chinese patent application submitted to the State Intellectual Property Office of China on October 12, 2018 with the application number CN201811189894.8 and the application name "a method and related device for controlling video color ring back tone playback", all of which are The contents are incorporated in this application by reference.

Technical field

The present application relates to the field of multimedia services, and in particular, to a method and related device for controlling video color ring back tone playback.

Background technique

With the introduction of voice services based on the Internet Protocol Multimedia Subsystem (IMS), the quality of voice calls has been significantly improved compared to the 2 / 3G era. HD voice calls and video calls can be provided. Carrier's important voice value-added services, compared with the standard definition CRBT experience under 2 / 3G, the IMS-based CRBT service can provide HD CRBT and video CRBT experiences.

Video CRBT means that when the caller initiates an audio or video call to the called CRBT user, he can see a piece of video content while waiting for the call to connect. Video CRBT users can create or upload personalized video content, or choose from the operator's video library. Under the current video ring back tone solution, the calling user device will play the video ring back tone only after the called user device rings, and the playing time of the video ring back tone is shorter.

Summary of the invention

Embodiments of the present invention provide a method and apparatus for controlling video color ring back tone playback, to solve the limitation in the prior art that the video color ring back tone playback process can only be started after the called user equipment has been ringing. In particular, the various solutions provided below are beneficial to prolong the playing time of video color ring back tone and improve the user experience of video color ring back tone.

In a first aspect, an embodiment of the present invention provides a method for controlling video color ring back tone playback, which may include: a color ring back tone server receiving a call request message, where the request message carries a calling user identification. The CRBT server starts the process of playing the video CRBT early, and sends a call response message to the calling user device corresponding to the calling user ID. The color ring back tone server and the calling user device perform audio and video media negotiation, and after the audio and video media negotiation is completed, send the video color ring back tone media stream to the calling user device. Based on this solution, the CRBT server sends a call response message to the calling user equipment without waiting for the process of paging the called user equipment, and the video color ring back tone playback process is started in advance, so that the calling user You can watch the video ring back tone, without increasing the call connection time, the video ring back tone playing time is extended.

Optionally, after receiving the call request message sent by the calling user equipment, the color ring back tone server determines that the request message carries an indication that the telephone application server (TAS) of the calling domain has the ability to play the video ring back tone early. Based on the determination, the color ring back tone server initiates the process of playing the video color ring back tone early, and sends a call answering message to the calling user equipment. And the instruction indicates that the network elements of the calling domain are capable of playing video CRBT early. Based on this solution, when the calling domain device has the ability to play video CRBTs early, the CRBT server initiates the early video CRBT process to avoid problems such as incorrect answer rate statistics because the calling domain device does not support the early video CRBT function.

Optionally, the call response message sent by the CRBT server to the calling user equipment is a 183 message. Based on this solution, the CRBT server replaces the called user equipment and sends a 183 message to the calling user equipment. The 183 message is used to respond to the calling UE's call request and respond to the calling UE's SDP negotiation request, ending the SDP negotiation process. Therefore, this solution does not have to wait for the process of paging the called user equipment, and the video color ring back tone playback process is started in advance, and the video color ring back tone playback time is extended without increasing the call connection time.

Optionally, after receiving the call request message, the color ring back tone server sends a notification message to the call session control function device (CSCF) of the called domain to notify the CSCF to play the video color ring back tone for this call in advance. The notification message may be a 183 message or an Invite message, and the CRBT server adds an indication that the early playback of the video CRBT has been activated in the notification message. Based on this solution, the CRBT server transmits to the CSCF of the called domain the information of playing the video CRBT in advance for this call, and the CSCF will also transmit this information to other network elements of the calling domain and the called domain, such as the telephone application server (TAS), etc. . In this way, it is avoided that other network elements process the call in the prior art process, which causes errors in answer rate statistics and the like.

Optionally, the color ring back tone server receives the call status prompt message sent by the TAS of the called domain, and notifies the calling user of the corresponding call status prompt in the prompt message. The call status prompt message may be an INFO message. The INFO message can carry information about the call, call status prompts, subtitle information and subtitle type of the call status, etc. Based on this solution, the calling user can get the status information of the call in time. Based on this information, the calling user can choose to end the call or continue to wait for the call to be answered.

Optionally, the method for the CRBT server to notify the calling user of the call status prompt may be to synthesize the call status prompt into the video CRBT. Based on this solution, the calling user can obtain the notification of the call status while watching the video ring back tone, which improves the user experience.

Optionally, when a call failure occurs, the call status prompt is a call failure prompt, and the call failure prompt carries a call failure reason value. The call failure reason value can be the code value corresponding to the reason for the call failure, such as 000 corresponding to the unavailability of the called network, 001 corresponding to the called UE being in a call, 010 corresponding to the called UE being turned off, and calling no one Answer the corresponding 011, the call is dropped and the corresponding 100, etc. Based on this solution, when a call fails, the calling user can be promptly notified and the reason for the call failure. And when the call fails, the calling user may continue to watch the video ring back tone.

Optionally, when the called user equipment has ringed, the call status prompt is a prompt that the called user equipment has ringed. Based on this solution, when the called user has successfully paged, the calling user can be promptly notified.

In a second aspect, an embodiment of the present invention provides a method for controlling video CRBT playback, which may include: a calling user equipment sends a call request message to a CRBT server, and then receives a call response message returned by the CRBT server. The calling user equipment and the CRBT server conduct audio and video media negotiation, and after the audio and video media negotiation is completed, the video CRBT is played. Based on this solution, the calling user equipment receives the call response message sent by the color ring back tone server, and starts the process of negotiating and playing the video color ring back tone, without waiting for the process of paging the called user equipment, that is, the video color ring tone playback process is started in advance. Therefore, during the time of paging the called party, the calling user can watch the video color ring back tone, which extends the playing time of the video color ring back tone.

Optionally, the call response message sent by the CRBT server received by the calling user equipment is a 183 message. Based on this solution, the CRBT server replaces the called user equipment and sends a 183 message to the calling user equipment. The 183 message is used to respond to the calling UE's call request and the calling UE's SDP negotiation request, ending the SDP negotiation process. Therefore, this solution does not have to wait for the process of paging the called user equipment, and the video color ring back tone playback process is started in advance, and the video color ring back tone playback time is extended without increasing the call connection time.

Optionally, when the calling user equipment has video synthesis capability, the call request message may carry an indication of having video information synthesis capability. Based on this solution, the calling user equipment can notify the network side whether it has video synthesis capabilities when it initiates a call.

Optionally, the calling user equipment receives the call status prompt message and synthesizes the corresponding call status prompt in the prompt message into the video color ring back tone. The call status prompt message may be an INFO message. The INFO message can carry information about the call, call status prompts, subtitle information and subtitle type of the call status, etc. Based on this solution, the calling user can obtain the notification of the call status while watching the video ring back tone, which improves the user experience. And the calling user can choose to end the call or continue to wait for the call to be answered according to this prompt.

Optionally, when a call failure occurs, the call status prompt is a call failure prompt, and the call failure prompt carries a call failure reason value. The call failure reason value can be the code corresponding to the reason for the call failure, such as 000 corresponding to the unavailability of the called network, 001 corresponding to the called UE being in a call, 010 corresponding to the called UE being turned off, and 010 corresponding to the unanswered call. 011, 100 corresponding to the call being dropped. Based on this solution, when a call fails, the calling user can be promptly notified and the reason for the call failure. And when the call fails, the calling user may continue to watch the video ring back tone.

Optionally, when the called user equipment has ringed, the call status prompt is a prompt that the called user equipment has ringed. Based on this solution, when the called user has successfully paged, the calling user can be promptly notified.

In a third aspect, an embodiment of the present invention provides a color ring back tone server that controls video color ring back tone playback. The color ring back tone server has a function of implementing the method corresponding to the first aspect described above. This function can be realized by hardware, and can also be realized by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

According to a fourth aspect, an embodiment of the present invention provides a color ring back tone server for controlling video color ring back tone playback, which may include: a transceiver, a processor, a memory, and a bus; the memory is used to store computer execution instructions, and the processor and the memory pass the Bus connection, when the CRBT server is running, the processor executes the computer execution instruction stored in the memory, so that the CRBT server executes the method for controlling video CRBT playback as described in any one of the first aspects above.

According to a fifth aspect, an embodiment of the present invention provides a computer-readable storage medium having instructions stored therein, which when run on a computer, enables the computer to execute any of the above-mentioned first aspects A method to control the playback of video ring tones. The storage medium includes: a U disk, a mobile hard disk, a read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a magnetic disk or an optical disk, and other media that can store program codes.

According to a sixth aspect, an embodiment of the present invention provides a computer program product containing instructions that, when run on a computer, enable the computer to execute any one of the methods for controlling video CRBT playback according to any one of the first aspects above.

The technical effects brought by any one of the design methods in the third aspect to the sixth aspect can be referred to the technical effects brought by the different design methods in the first aspect, which will not be repeated here.

According to a seventh aspect, an embodiment of the present invention provides a calling user equipment that controls video color ring back tone playback. The calling user equipment has a function of implementing the method corresponding to the second aspect described above. This function can be realized by hardware, and can also be realized by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

According to an eighth aspect, an embodiment of the present invention provides a calling user equipment that controls video ring back tone playback, which may include: a transceiver, a processor, a memory, and a bus; the memory is used to store computer-executed instructions, and the processor and the memory Through the bus connection, when the calling user equipment is running, the processor executes the computer execution instruction stored in the memory, so that the calling user equipment executes the control of the video ring back tone playback as described in any one of the second aspects above Methods.

In a ninth aspect, an embodiment of the present invention provides a computer-readable storage medium having instructions stored therein, which when run on a computer, enables the computer to execute any of the above-mentioned second aspects A method to control the playback of video ring tones. The storage medium includes various media that can store program codes, such as a U disk, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

According to a tenth aspect, an embodiment of the present invention provides a computer program product containing instructions that, when run on a computer, enable the computer to execute any method for controlling video ring back tone playback according to any one of the foregoing second aspects.

The technical effects brought by any one of the design methods in the seventh aspect to the tenth aspect can be referred to the technical effects brought by the different design methods in the second aspect, which will not be repeated here.

These or other aspects of the present invention will be more concise and understandable in the description of the following embodiments.

BRIEF DESCRIPTION

FIG. 1 is a schematic diagram of a system architecture provided in an embodiment of the present invention;

2 is a schematic diagram of an embodiment of a method for controlling video color ring back tone playback in an embodiment of the present invention;

3 is a schematic diagram of an embodiment of a color ring back tone server in an embodiment of the present invention;

4 is a schematic diagram of an embodiment of a calling user equipment according to an embodiment of the present invention;

5 is a schematic diagram of another embodiment of a color ring back tone server according to an embodiment of the present invention;

6 is a schematic diagram of another embodiment of a calling user equipment according to an embodiment of the present invention.

detailed description

Embodiments of the present invention provide a method and related device for controlling the playback of video color ring back tone, which is used to extend the playing time of video color ring back tone, and realize the function of fully utilizing the time of paging called to play video color ring back tone.

FIG. 1 is an application scenario diagram of a method for controlling video CRBT playback provided by an embodiment of the present invention, which may include: a calling user equipment (UE), a called UE, an IMS domain core network (IMS Core), and an evolved packet core network (Evolved) Packet Core, EPC). The color ring back tone server, as an important telecommunications value-added business support, may include a color ring back tone application server (Customized Alerting Tone Application Server, CAT AS), located in the called IMS Core. The signalling plane of the CRBT server is connected to the service type call session control function (Serving-Call Session Control, Function, S-CSCF), and the media plane is connected to the session border control (Session Border Controller, SBC) to provide users with the media playback of CRBT sound. The status video prompt server, located in the called IMS Core, is used to realize the function of calling status prompt in the video. For example, when the call fails, the video color ring back displays "The user you dialed is not in the service area". User has been turned off "," The user you dialed is in a call "," The phone you dialed is unanswered "and other prompts; when the called user's device has been ringing," The phone you dialed has been displayed in the played video ringback tone " Ringing "and other prompts. The status video prompt server can be an independent newly created network element entity, or it can use an existing server to realize its function, such as CAT AS.

In the architecture diagram shown in FIG. 1, the calling IMS domain may include the calling IMS Core and the calling EPC. The calling IMS Core includes: Home Subscriber Server (HSS), Telephony Application Server (TAS), interrogating-call session control function (I-CSCF), proxy Type of call session control function (Proxy-Call session Control Function, P-CSCF), service type call session control function (Service-Call session Control Control Function, S-CSCF) and session border control (Session Border Controller, SBC). EPC includes a service gateway (Serving Gateway, S-GW), a packet data network gateway (Public data network Gateway, P-GW); and a mobile management entity (Mobile Management Entity, MME). In addition to the network elements described in the calling IMS domain, the called IMS domain also includes CAT AS, status video prompt server, and called EPC.

The following is a brief description of some of the network elements mentioned above:

S-CSCF: Responsible for user registration, authentication control, session routing and service trigger control, and maintain session state information.

I-CSCF: Responsible for the assignment and query of S-CSCF registered by users.

P-CSCF: Agent responsible for signaling and messages.

TAS: Mainly responsible for call control and service, providing multiple logical function points, including Multimedia Telephony Application Server (MMTel AS). MMTel AS provides basic and supplementary services for multimedia telephony.

HSS: is a user database system that stores user subscription information and location information.

SBC: Provide secure access and media processing.

MME: Mainly responsible for session management, mobility management and call switching.

S / P-GW: responsible for packet data routing, forwarding, and bearer management.

CAT AS: It is the service equipment of the CRBT service. It is responsible for connecting the called party and triggering the CRBT playback when the CRBT is called.

Status video prompt server: provides users with a call system in various scenarios (such as user shutdown, user is on a call, call connected, etc.), which can personally customize the video prompt service.

Brief introduction of SIP routing trigger of CRBT in IMS domain:

The IMS domain CRBT trigger mainly follows the 3GPP 24.182 protocol specification, and uses the called IMS domain triggering principle. When the request (Invite) message initiated by the calling IMS domain is sent to the called IMS domain S-CSCF, the called S-CSCF passes the user. The initial filter rule (iFC) subscription information is triggered to the color ring back tone server. After the color ring back tone server processes the call message back to the S-CSCF, the subsequent process such as paging the called user equipment is performed. After receiving the called ringing message (180), the CRBT server starts the playback process to the calling user. When the called party goes off-hook, the CRBT server initiates a Re-Invite process to complete the media between the calling and the called party Negotiation, and finally complete the call between the calling and called users.

In the prior art, only after the called user equipment has ringed (180), the CRBT server will start the video CRBT playback process. However, it takes about 2 to 6 seconds from receiving the Invite request initiated by the calling party from the CRBT server to the ringing of the called user device. This period of time has not been utilized. In the technical solution of the present invention, a method and related device for controlling the playback of a video color ring back tone are provided, so that after the color ring back tone server receives the Invite request initiated by the calling party, the color ring back tone server starts the video color ring tone playback process. In addition, the present invention can also implement a call status prompt function. One method is to use a status video prompt server to synthesize call status information into a video color ring back tone and display it on the screen of the calling user device. Another method is that the calling user equipment has video synthesis capability and displays the status information of the call on the screen. The calling user can see the prompt information of the call status at the same time when watching the video.

The technical solutions of the present invention will be described below by way of examples. The following description takes an audio call as an example, but any other type of communication service or multimedia service, such as a video call, is also applicable. In addition, it should be noted that the early playing of the color ring back tone in the embodiment of the present invention means that the color ring back tone server starts the video color ring back tone playing process when it receives the call request initiated by the calling user equipment, that is, it does not need to wait for the called party The process of playing the video color ring back tone may also be called playing the video color ring back tone in advance, or the video color ring back tone is turned on in seconds, etc., which is not limited in this embodiment of the present invention.

As shown in FIG. 2, it is a schematic diagram of an embodiment of a method for controlling video CRBT playback in an embodiment of the present invention. The method for controlling the playback of a video color ring back tone provided by an embodiment of the present invention can be applied to the application scenario provided in FIG. 1 described above, and CAT AS is used as a color ring back tone server for illustration in the following schematic diagram of the embodiment. In addition, it should be noted that the status video prompt server may be implemented by an independent network element entity, or by using another existing service that can simultaneously implement a call status prompt function. The embodiment of the present invention uses a status video prompt server The function is implemented by CAT AS as an example, other situations are also applicable. The embodiments of the present invention include:

201. The calling UE initiates an audio call;

202. The color ring back tone server starts the process of playing the video color ring back tone early;

203. The called IMS domain pages the called user equipment;

204. The called user equipment rings;

205. The call ends.

In the embodiment of the present invention, after the color ring back tone server receives the calling request of the calling UE, the process of playing the video color ring back tone is started. The process of calling the called user equipment by the called IMS domain is parallel to the process of playing the video color ring back tone early. In some technologies, it is necessary to wait for the called party to page and ring before starting the limitation of playing the video color ring back tone, which prolongs the playing time of the video color ring back tone.

The specific signaling steps are described as follows:

Wherein, the calling UE in step 201 initiates an audio call may include:

1. The calling user equipment (User Equipment, UE) sends an invitation request (Invite) message, which includes the calling UE's session description protocol (Session Description Protocol (SDP) information, calling user identification (caller ID), Called user identification (called ID) and audio call. The calling UE is the device corresponding to the calling ID. For example, the calling user identification is the calling user number, and the calling user device is the mobile phone with the SIM card of that number inserted. The calling UE is the requesting entity Offerer, so the SDP of the calling UE can be expressed as SDP_O.

Optionally, when the calling UE has video synthesis capability, the Invite message may carry an indication that the calling UE has video synthesis capability, for example, add + g.3gpp.subtitles in the Contact header field.

Optionally, when the calling session control function device (P-CSCF, I / S-CSCF) of the calling domain receives the Invite message, if it supports the early playback of video ring back tone function, add each of the early playback video ring back tone to the Invite message An indication of ability. The telephone application server (TAS) in the calling domain detects whether the call session control function devices all have the ability to play video CRBT early. If all the call session control function devices have this capability, and TAS also has this capability, TAS is calling the called party. When the Invite message is forwarded in the IMS domain, an indication that the TAS has the ability to play video CRBTs is added to it, and this indication also indicates that the calling domain network elements all have the ability to play the video CRBTs early. For example, when P-CSCF and I / S-CSCF add their own record-route records in the Invite message, they also add the g.3gpp.cat-prering string as an indication of the ability to play video CRBT early. When TAS reconstructs the record-route header field, if all current record-route records have a g.3gpp.cat-prering string, and TAS itself also has the ability to play video CRBT early, TAS is in the new record-route The g.3gpp.cat-prering string is added to the header field as an indication that TAS has the ability to play video CRBTs early, and this indication also indicates that P-CSCF, I / S-CSCF, and TAS of the calling domain are all equipped with early play video CRBTs. Ability;

2. After receiving the request, the call session control function (CSCF) of the called IMS domain transmits the Invite message to the color ring back tone application server (CAT AS);

202. The color ring back tone server starts the process of playing the video color ring back tone early. Specifically, it may include:

3. After receiving the request, CAT AS starts the process of playing early video ringback tone according to the user's subscription information or local configuration. For example, according to the called user's subscription information, check whether the early play video ringback tone function is enabled. If the function is enabled, start The process of playing video CRBT early.

Optionally, after the CAT AS receives the request, it will detect whether the network elements of the calling domain all have the ability to play video CRBT early. When the network elements of the calling domain are capable of playing video CRBTs early, CAT AS starts the process of playing video CRBTs early. For example, when the Invite message carries an indication that the TAS of the calling domain is capable of playing video CRBTs early, CAT AS starts the process of playing video CRBTs early. The indication may be that there is a g.3gpp.cat-prering string in the record-route record of TAS. When the TAS of the calling domain receives the Invite message, it will delete the record-route record of the call session control function device, and the TAS has reconstructed the record-route header domain and added the g.3gpp.cat-prering string. Confirm that the call session control function device and itself are capable of playing early video ringback tone, so CAT AS detects that the TAS carrying the calling domain in the Invite message is capable of playing early video ringback tone, and it can be obtained that the network elements of the calling domain are all equipped. The ability to play video CRBT early.

CAT AS forwards the Invite message to the CSCF of the called domain. The Invite message may be a notification message, used to notify the CSCF of the called domain that the video CRBT will be played in advance for this call, and the CSCF of the called domain will also notify other networks of the called domain. yuan. For example, in the Invite message, the prompt to activate the early playing video color ring back tone is added, and the prompt to play the early playing video color ring back tone can have many expressions. For example, the Invite message carries Contact: + g.3gpp.cat-prering-active;

4-5. The CAT AS sends a 183 message to the CSCF, and the CSCF forwards the 183 message to the calling UE. The 183 message includes the response SDP information (SDP_A). The 183 message is a call answer message and is constructed by CAT AS. CAT AS instead of the called UE sends a 183 message to the calling UE, which is used to respond to the calling request message of the calling UE, respond to the calling UE's SDP negotiation request, and end the SDP negotiation process. The 183 message can carry SDP information of CAT AS or fictitious SDP information. For example, the IP port number in SDP is not used externally (loopback address of network segment 127, or private network of network segment 192) Address, etc.).

CAT AS also adds a reminder that the early playback of video ring back tone has been activated in the 183 message. The 183 message can also be a notification message to notify the CSCF to play the video ring back tone in advance for this call, and the CSCF will also notify other network elements of the called domain and The network element of the calling domain. Among them, there may be many ways to express the prompt that the video CRBT has been activated, for example, the 183 message carries Alert-info: urn: service: preringing.

The 183 message is sent by the called UE to the calling UE in the flow of the prior art, indicating that the called UE has received the call request message, that is, the called UE has successfully paged. As for the process of playing the video CRBT early in the present invention, the 183 message is sent by the CAT AS to the calling UE to replace the called UE in response to the calling request message of the calling UE, and does not indicate that the called UE has successfully paged . Therefore, the network element of the calling domain and the network element of the called domain do not count the 183 message with the early play video color ring back tone as the called UE has paged successfully when doing the answer rate statistics. Optionally, the network element that makes the answer rate statistics can make separate statistics for the 183 message with the prompt that the early play video CRBT has been activated;

6-7. After receiving the 183 message, the calling UE returns a PRACK message, indicating that the 183 message has been received;

8-9. The CAT AS returns a 200 OK message to the calling UE. The 200 OK message carries PRACK information, indicating that the called party has received the PRACK message;

10-11. The CAT AS sends an Update message to the calling UE. The Update message includes the SDP information of the CAT AS. The CAT AS is the requesting entity Offer. Therefore, the SDP of the CAT AS can be expressed as SDP_O.

12-13. The calling UE receives the Update message and sends a 200OK message to the CSCF.

If the calling UE supports audio / video CRBT media, perform audio / video media negotiation based on the audio / video CRBT media SDP information carried in the Update message and the calling UE's media capability information, and obtain the audio / video media negotiation results. CAT AS sends a 200 OK message, which carries the result of the audio / video media negotiation; CAT AS sends a video CRBT to the calling UE, and the calling UE displays the video CRBT.

It should be noted that the embodiment of the present invention is illustrated by taking an audio call as an example. In step 1, the SDP_O carried in the Invite message sent by the calling UE may not include video media related information or the video media information included is CAT AS Not supported, so the CAT AS in steps 4 to 5 sends a 183 message for SDP negotiation response, which does not guarantee that the audio / video CRBT media can negotiate successfully. In this section, steps 10 to 11 CAT AS sends an Update message to renegotiate audio and video media. When the calling UE initiates a video call or the calling UE initiates an audio call, the SDP carried already contains both audio media and video media related information, and the video media related information is supported by CAT AS, then steps 1 to 5 CAT AS After completing the audio and video CRBT media negotiation with the calling UE, the audio and video media renegotiation in steps 10 to 13 of this paragraph may not be necessary.

203. The called IMS domain pages the called user equipment. It should be noted that the 203-segment signaling and the 202-segment 4 to 13-step signaling are parallel. Specifically, it may include:

14. The CSCF transmits the Invite message to the TAS of the called domain. The Invite message carries the SDP of the calling UE and a prompt that the early play video color ring back tone has been activated. TAS then returns the Invite message to the CSCF. It should be noted that the embodiment of the present invention takes TAS deployed after CAT AS as an example for description. TAS can obtain the information that the early play video color ring back tone carried in the Invite message is activated, and the information that the call starts playing the video color ring back in advance is obtained. For the case where the TAS not shown in the embodiment of the present invention is deployed before the CAT AS, the TAS can obtain the information that the early play video color ring back tone carried in the 183 message is activated and the information that the call starts playing the video color ring back in advance;

15. The CSCF transparently transmits the Invite message to the called UE;

16. After receiving the Invite message, the called UE returns a 183 message to the CSCF. The 183 message includes the SDP information of the called UE. The called UE is the response entity Answerer, so the SDP of the called UE can be expressed as SDP_A. The 183 message indicates that the called UE has received the call request message, that is, the called UE has successfully paged. When the network elements of the calling domain and the network domain of the called domain do the answer rate statistics, they can count the receipt of the 183 message (without the early play video ring back tone prompt) as the called UE has paged successfully;

17. CSCF sends 183 message to TAS; TAS returns 183 message to CSCF;

18. CSCF sends 183 message to CAT AS;

19. After the CAT AS receives the 183 message, it returns a confirmation (PRACK) message, indicating that the 183 message has been received;

20. The CSCF sends the PRACK message to the TAS; the TAS returns the PRACK message to the CSCF;

21. CSCF sends a PRACK message to the called UE;

22. After receiving the PRACK message, the called UE returns a 200 OK message. The 200 OK message carries PRACK information, indicating that the called UE has received the PRACK message;

23. CSCF sends a 200OK message to TAS; TAS returns the 200OK message to CSCF;

24. The CSCF sends a 200OK message to CAT AS;

204. The called user equipment rings. Specifically, it includes:

25. The called UE sends a 180 message to the CSCF, indicating that the called UE has started ringing;

26. The CSCF sends the 180 message to the TAS; the TAS returns the 180 message to the CSCF;

27. The CSCF sends the 180 message to the CAT AS; the CAT AS returns the 180 message to the CSCF. The 180 is a call status prompt message. The corresponding call status prompt is that the called UE has ringed, and the CAT AS obtains the information that the called UE has ringed from the 180 message. Optionally, CAT AS can synthesize the ringing information of the called UE into the video screen of the video color ring back tone. For example, CAT AS synthesizes subtitles such as "The called party has ringed", "Call connected, waiting for the user to answer" to the video screen. Then, the video color ring back tone played by the calling UE shows the prompt that the called UE has ringed, and the calling user gets the information.

28. The CSCF sends a 180 message to the calling UE. The calling UE obtains the information that the called UE has ringed from the 180 message. Optionally, when the calling UE has video synthesis capability, the calling UE can synthesize the ringing information of the called UE into the video screen of the video color ring back tone. For example, the calling UE synthesizes the video screen with subtitles such as "The called party has ringed", "Call connected, and waiting for the user to answer". Then, the video color ring back played by the calling UE displays the information that the called UE has ringed, and the calling user obtains the information. It should be noted that the information that the called party has ringed may not be displayed in the color ring back of the video being played, but may be displayed elsewhere on the mobile phone screen; or the calling UE does not need to notify the calling user after receiving the 180 message.

205. The call ends.

Among them, the call end may include a call failure or a call hang up. There are many possible situations for a call failure. For example, when the CSCF sends an Invite message to TAS at step 14 of section 203, the called network is unavailable, and the called user owes a down payment. When the calling UE sends an Invite message, the called UE is in a call or the called UE has been turned off, etc. For example, after the 203 paragraph 24 step, it has not received the message that the called UE has ringed (180), that is, the paging has timed out For example, after step 28 of paragraph 204, the called UE has ringed, but the called user has not picked up the phone, that is, the call is not answered.

29a. When a call fails, TAS can send an INFO message to CAT AS. The INFO message is a call status prompt message, and the corresponding call status prompt is a call failure prompt. The INFO message may contain information about the call. For example, the From header field is the calling number, the R-URI header field is the CAT-AS address, and the TO header field is the called number. The call failure prompt of the INFO message may carry a call failure reason value. The call failure reason value may be the code value corresponding to the reason for the call failure situation, for example, the corresponding number of the called network is unavailable, 000, the corresponding of the called UE is in a call. 001, 010 corresponding to the called UE being turned off, 011 corresponding to the unanswered call, 100 corresponding to the call being hung up, etc. The call failure prompt of the INFO message may carry subtitle information of video synthesis, that is, subtitle information that prompts the calling user of the call failure, and the subtitle information may be the value of the cause of the call failure. In addition, the call failure prompt can also carry the subtitle type of video synthesis, such as Chinese and English.

After the CAT AS receives the INFO message, it synthesizes the call failure prompt into the video color ring back tone, then the video color ring back tone played by the calling UE displays a call failure prompt, and notifies the calling user of the prompt. CAT AS decodes the value of the cause of the call failure in the INFO message to obtain the cause of the call failure and synthesizes it into the video screen in the form of subtitles or barrage. On the video screen, subtitles for the reasons for call failures such as "The user you dialed is not in the service area", "The phone you dialed are in a call", "The user you dialed are turned off", and "The phone you dialed are not answered" are displayed. The method for synthesizing the video may be to decode the current video CRBT video stream, and then superimpose the subtitles and the video picture and then re-encode. So there are subtitles in the video screen.

After seeing the call failure prompt, the calling user can continue to watch the video ringback tone, or can hang up to end the call. If the video ringback tone playback ends, the calling user has not hung up, and the network side actively ends the call.

Optionally, after receiving the INFO message, CAT AS can decide whether to continue to play the video ringback tone for a few seconds according to local configuration, or directly stop the video ringback tone playback, play an audio prompt of the call failure to the calling user, and notify the call failure prompt To the calling user.

29b. When a call fails, the TAS can also send an INFO message to the calling UE. The INFO message is a call status prompt message, and the corresponding call status prompt is a call failure prompt. The INFO message may also carry information about the call, call failure prompt, etc. The call failure prompt may carry the call failure reason value. For details, see 29a.

When the calling UE has video synthesis capability, after receiving the INFO message, the calling UE can synthesize the call failure prompt into the video screen of the video color ring back tone. For details, see 29a. The method of synthesizing the video may be to superimpose the subtitle directly on the video. Then, the video color ring back tone played by the calling UE displays a call failure notification.

After seeing the call failure prompt, the calling user can continue to watch the video ringback tone, or can hang up to end the call. If the video ringback tone playback ends, the calling user has not hung up, and the network side actively ends the call.

Optionally, after receiving the INFO message, the calling UE may decide whether to continue to play the video ringback tone for a few seconds according to local configuration, or directly stop the video ringback tone playback, and play an audio prompt of the call failure to the calling user.

It should be noted that 29a and 29b are two possible situations in which a call failure notification is notified to the calling user. 29a is that TAS sends a call failure prompt message to CAT AS to notify the calling user through CAT AS; 29b is TAS Send a call failure prompt message to the calling UE, and then notify the calling user. In the embodiment of the present invention, the INFO message is used as a call status prompt message as an example. The call status prompt message may also be an Update message or other messages. For example, when a call failure occurs, TAS sends an Update message to CAT AS, carrying PEM = sendonly means that the network side plays the sound, CAT AS stops playing the video ring back tone after receiving the Update message, and forwards the Update message to the calling UE. In this case, the TAS takes over and plays the audio prompt of the call failure for the calling UE.

30. The CAT AS sends an OXX message to the calling UE, indicating that the call has failed, closes the call signaling for this call, and releases the media resources for this call.

It should be noted that the TAS may also send an OXX message to the calling UE, which is not limited in this embodiment of the present invention.

In addition, when the call proceeds normally, the called user picks up the phone, CAT AS stops playing the video ring back tone, and initiates a Re-Invite process to complete the media negotiation between the calling and called parties, and complete the calling and called users Call. Eventually the call hangs up and the call ends normally.

In the embodiment of the present invention, the calling UE initiates the call, and the CRBT server starts the process of playing the video CRBT early after receiving the call request. The invention solves the limitation that the video color ring back playing process can only be started after the called user equipment has ringed. Based on the technical solution of the present invention, a method for playing the video color ring back tone in advance can be provided, so that the calling user can start watching the video color ring back tone during the process of paging the called party, thereby extending the playing time of the video color ring back tone. Moreover, the technical solution of the present invention also implements a call status prompt function, so that the calling user can understand the status of the call while watching the video color ring back tone. Even if the call fails, the calling user device can continue to watch the video color ring back tone, which improves User experience of video ring back tone. In addition, the present invention also notifies the network elements of the calling domain and the called domain of the information that the call is played in advance in order to avoid errors in the answer rate statistics.

As shown in FIG. 3, it is a schematic diagram of a possible structure of the color ring back tone server involved in the above embodiment. The color ring back tone server includes a sending module 301, a receiving module 302, a negotiation module 303, a determining module 304, a notification module 305, and a video synthesis Module 306.

The receiving module 302 is configured to receive a call request message, where the request message carries the calling user identification. For the specific receiving process, please refer to 201 in FIG. 2; the sending module 301 is used to send a call answering message to the calling user equipment. The calling user equipment is a device corresponding to the calling user identity and the answering message may be a 183 message. For the specific process, refer to 202 in FIG. 2; the negotiation module 303 is also used to negotiate audio and video media with the calling user equipment. The specific process may refer to 202 in FIG. 2; the sending module 301 is also used to send a video color ring backing media stream to the calling user equipment after the audio and video media negotiation is completed, and play the video color ring back to the calling user equipment. For the specific process, please refer to 202 in FIG. 2.

Optionally, after the receiving module 302 receives the call request, the determining module 304 is configured to determine that the call request message carries an indication that the phone application server corresponding to the calling user device has the ability to play the video CRBT early. Based on the determination, the sending module 301 is used to send a call response message to the calling user equipment. For the specific process, please refer to 201 and 202 in FIG. 2.

Optionally, after the receiving module 302 receives the call request message sent by the calling user equipment, the sending module 301 is also used to send a notification message to the call session control function device (CSCF) of the called domain to notify the CSCF of the call advance Play video ring tones. The notification message may be a 183 message or an Invite message, and the notification message carries an indication that the early play of the video CRBT has been activated. Among them, there may be many ways to express the prompt that the video CRBT has been activated, such as Alert-info: urn: service: preringing carried in the 183 message, or Contact: + g.3gpp.cat-prering-active carried in the Invite message. When the answering rate statistics of the network element of the calling domain and the network element of the called domain cannot be counted, the 183 message with the early play video color ring back tone prompt is counted as the called user equipment has paged successfully. Optionally, the network element that makes the answer rate statistics can perform separate statistics for the 183 message with the early play video color ring back tone prompt. For the specific process, please refer to 202 and 203 in FIG. 2.

Optionally, the receiving module 302 is also used to receive a call status prompt message sent by the telephone application server of the called domain; the notification module 305 is also used to notify the calling user of the call status prompt corresponding to the prompt message. The call status prompt message may be an INFO message. The INFO message can carry information about the call, call status prompts, subtitle information and subtitle type of the call status, etc. For the specific process, please refer to 204 and 205 in FIG. 2.

Optionally, the video synthesis module 306 is also used to synthesize the call status prompt into the video color ring back tone. Optionally, the call status prompt may be a call failure prompt, and the call failure prompt carries a call failure reason value. The call failure prompt can be synthesized into the video, and can be synthesized into the video screen in the form of subtitles, such as "the user you dialed is not in the service area", "the phone you dialed is in a call", "the user you dialed is already in the video" "Shutdown" and other subtitles for the reason for the call failure. Optionally, the call status prompt may be a prompt that the called user equipment has ringed. Synthesize the reminder that the called user has ringed into the video, which can be combined into the video screen in the form of subtitles. For example, subtitles such as "the called party has ringed", "call connected, and waiting for the user to answer" are synthesized in the video. For the specific process, please refer to 204 and 205 in FIG. 2.

It should be noted that the above function of receiving the call status prompt message and calling status prompt of the calling user can be performed by the relevant module of the color ring back tone server, or by the relevant module of the status video prompt server, or by other The related modules of the network element entity that has the existing service and can simultaneously implement the call status prompt function are completed. The embodiment of the present invention is not limited, and only the ring back tone server is used as an example for description here.

Since the color ring back tone server provided by the embodiment of the present invention can be used to control the method of playing video ring back tone, the technical effects that can be obtained can refer to the above method embodiments, which will not be repeated here.

As shown in FIG. 4, it is a possible structural schematic diagram of the calling user equipment involved in the foregoing embodiment. The calling user equipment includes a sending module 401, a receiving module 402, a negotiation module 403, a playing module 404, and video synthesis Module 405.

The sending module 401 is configured to send a call request message to the color ring back tone server. The call request message may be an Invite message. Optionally, when the calling user equipment has video synthesis capability, the call request message may carry an indication that the calling user equipment has video synthesis capability. For the specific process, see 201 in FIG. 2; the receiving module 402 is used to receive a call response message sent by the color ring back tone server, and the response message may be a 183 message. For the specific process, please refer to 202 in FIG. 2; the negotiation module 403 is also used for audio and video media negotiation with the CRBT server. For the specific process, please refer to 202 in FIG. 2; the play module 404 is used to play the video ring back tone after the audio and video media negotiation is completed. For the specific process, please refer to 202 in FIG. 2.

Optionally, the receiving module 402 is also used to receive a call status prompt message. The call status prompt message may be an INFO message. The INFO message may carry information about the call, call status prompt, call status subtitle information and subtitle type, etc .; the video synthesis module 405 is also used to synthesize the call status prompt to the video In CRBT; optionally, the call status prompt may be a call failure prompt, and the call failure prompt carries the value of the call failure reason. The call failure prompt can be synthesized into the video, and can be synthesized into the video screen in the form of subtitles, such as "the user you dialed is not in the service area", "the phone you dialed is in a call", "the user you dialed is already in the video" "Shutdown" and other subtitles for the reason of the call failure; optionally, the call status prompt may be that the called user equipment has ringed. Synthesize the reminder that the called user has ringed into the video, which can be combined into the video screen in the form of subtitles. For example, subtitles such as "the called party has ringed", "call connected, and waiting for the user to answer" are synthesized in the video. For the specific process, please refer to 204 and 205 in FIG. 2.

Since the calling user equipment provided by the embodiment of the present invention can be used to control the method of playing the video color ring back tone, the technical effects that can be obtained can refer to the above method embodiments, which will not be repeated here.

As shown in FIG. 5, it is a schematic diagram of another embodiment of a color ring back tone server in an embodiment of the present invention. include:

The CRBT server may have a relatively large difference due to different configurations or performances, and may include a transceiver 501, one or more central processing units (CPUs) 502 (for example, one or more processors), and a memory 503 , One or more storage media 504 (for example, one or more mass storage devices) that stores application programs 5041 or data 5042. The memory 503 and the storage medium 504 may be short-term storage or persistent storage. The program stored in the storage medium 504 may include one or more modules (not shown in FIG. 5), and each module may include a series of instruction operations on the color ring back tone server. Furthermore, the central processor 502 may be configured to communicate with the storage medium 504 and execute a series of instruction operations in the storage medium 504 on the CRBT server.

In one embodiment of the present invention, the transceiver 501 has the following function: used to receive a call request message, where the request message carries the calling user identification. The specific receiving process can be referred to 201 in FIG. 2; it is used to send a call response message to the calling user equipment, where the calling user equipment is a device corresponding to the calling user identity and the response message may be a 183 message. For the specific process, refer to 202 in FIG. 2; the transceiver 501 or the central processor 502 is used for audio and video media negotiation with the calling user equipment. For the specific process, please refer to 202 in FIG. 2. The central processor 502 is also used to send a video CRBT media stream to the calling user equipment after the audio and video media negotiation is completed, and play the video CRBT to the calling user equipment. For the specific process, please refer to 202 in FIG. 2.

Optionally, after the transceiver 501 receives the call request, the central processor 502 is used to determine that the call request message carries an indication that the phone application server corresponding to the calling user equipment has the ability to play video CRBT early. Based on this determination, the transceiver 501 is used to send a call response message to the calling user equipment. For the specific process, please refer to 201 and 202 in FIG. 2.

Optionally, after receiving the call request message sent by the calling user equipment, the transceiver 501 is also used to send a notification message to the call session control function device (CSCF) of the called domain to notify the CSCF that the call is played in advance Video ring tones. The notification message may be a 183 message or an Invite message, and the notification message carries an indication that the early play of the video CRBT has been activated. Among them, there may be many ways to express the prompt that the video CRBT has been activated, such as Alert-info: urn: service: preringing carried in the 183 message, or Contact: + g.3gpp.cat-prering-active carried in the Invite message. When the answering rate statistics of the network element of the calling domain and the network element of the called domain cannot be counted, the 183 message with the early play video color ring back tone prompt is counted as the called user equipment has paged successfully. Optionally, the network element that makes the answer rate statistics can perform separate statistics for the 183 message with the early play video color ring back tone prompt. For the specific process, please refer to 202 and 203 in FIG. 2.

Optionally, the transceiver 501 is also used to receive a call status prompt message sent by the telephone application server of the called domain. The transceiver 501 or the central processor 502 is also used to notify the calling user of the call status prompt corresponding to the prompt message. The call status prompt message may be an INFO message. The INFO message can carry information about the call, call status prompts, subtitle information and subtitle type of the call status, etc. For the specific process, please refer to 204 and 205 in FIG. 2.

Optionally, the central processor 502 is also used to synthesize the call status prompt into the video color ring back tone. Optionally, the call status prompt may be a call failure prompt, and the call failure prompt carries a call failure reason value. The call failure prompt can be synthesized into the video, and can be synthesized into the video screen in the form of subtitles, such as "the user you dialed is not in the service area", "the phone you dialed is in a call", "the user you dialed is already in the video" "Shutdown" and other subtitles for the reason for the call failure. Optionally, the call status prompt may be a prompt that the called user equipment has ringed. Synthesize the reminder that the called user has ringed into the video, which can be combined into the video screen in the form of subtitles. For example, subtitles such as "the called party has ringed", "call connected, and waiting for the user to answer" are synthesized in the video. For the specific process, please refer to 204 and 205 in FIG. 2.

It should be noted that the above-mentioned function of receiving the call status prompt message and calling status prompt of the calling user can be completed by the transceiver 501 and the central processor 502 of the color ring back tone server, or by the status video prompt server, or It can also be completed by other network elements that have existing services and can also implement the call status prompt function. The embodiment of the present invention is not limited, and only the ring back tone server is used as an example for description here.

Since the color ring back tone server provided by the embodiment of the present invention can be used to control the method of playing video ring back tone, the technical effects that can be obtained can refer to the above method embodiments, which will not be repeated here.

As shown in FIG. 6, it is a schematic diagram of another embodiment of a calling user equipment according to an embodiment of the present invention. It should be noted that the calling user device may be a user's mobile phone or other mobile devices that can access the operator's wireless network, such as Internet of Things mobile devices.

FIG. 6 is a block diagram showing the structure of relevant parts of the calling user equipment according to an embodiment of the present invention. 6, the calling user equipment includes: a radio frequency (Radio Frequency) circuit 610, a memory 620, an input unit 630, a display unit 640, a sensor 650, an audio circuit 660, a wireless fidelity (WiFi) module 670, The processor 680, the power supply 690 and other components. Those skilled in the art may understand that the structure of the calling user equipment shown in FIG. 6 does not constitute a limitation on the calling user equipment, and may include more or less components than the illustration, or a combination of certain components, or different Parts layout.

The following describes the components of the calling user equipment in detail with reference to FIG. 6:

The RF circuit 610 can be used for receiving and sending signals during receiving and sending information or during a call. In particular, after receiving the downlink information of the base station, it is processed by the processor 680; in addition, the uplink data designed to be sent to the base station. Generally, the RF circuit 610 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier (LNA), a duplexer, and the like. In addition, the RF circuit 610 can also communicate with other devices through a wireless communication network. The above wireless communication can use any communication standard or protocol, including but not limited to Global Mobile System (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (Code Division) Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), New Radio (New Radio), Email, Short Message Service (Short Messaging Service, SMS) )Wait.

The memory 620 may be used to store software programs and modules. The memory 620 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, application programs required by at least one function (such as a sound playback function, an image playback function, etc.), etc .; the storage data area may store Data created by the use of user equipment (such as audio data, phone book, etc.), etc. In addition, the memory 620 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other volatile solid-state storage devices.

The processor 680 is the control center of the calling user equipment, uses various interfaces and lines to connect the various parts of the entire user equipment, runs or executes the software programs and / or modules stored in the memory 620, and calls stored in the memory 620 Data, perform various functions and process data of the calling user equipment, so as to monitor the calling user equipment as a whole. Optionally, the processor 680 may include one or more processing units; optionally, the processor 680 may integrate an application processor and a modem processor, where the application processor mainly processes the operating system, user interface, and application programs Wait, the modem processor mainly deals with wireless communications. It can be understood that, the foregoing modem processor may not be integrated into the processor 680.

In an embodiment of the present invention, the RF circuit 610 included in the calling user equipment also has the following function: used to send a call request message to the color ring back tone server, and the call request message may be an Invite message. Optionally, when the calling user equipment has video synthesis capability, the call request message may carry an indication that the calling user equipment has video synthesis capability. The specific process can be referred to 201 in FIG. 2; it is used to receive a call response message sent by the color ring back tone server, and the response message may be a 183 message. The specific process can be referred to 202 in FIG. 2; it is also used for audio and video media negotiation with the CRBT server. For the specific process, please refer to 202 in FIG. 2;

The display unit 640 also has the following function: used to play the video color ring back tone after the audio and video media negotiation is completed. For the specific process, please refer to 202 in FIG. 2.

Optionally, the RF circuit 610 is also used to receive a call status prompt message. The call status prompt message may be an INFO message. The INFO message may carry information about the call, call status prompt, call status subtitle information, and subtitle type The processor 680 is also used to synthesize the call status prompt into the video ring back tone. Optionally, the call status prompt may be a call failure prompt, and the call failure prompt carries a call failure reason value. The call failure prompt can be synthesized into the video, and can be synthesized into the video screen in the form of subtitles, such as "the user you dialed is not in the service area", "the phone you dialed is in a call", "the user you dialed is "Shutdown" and other subtitles for the reason of the call failure; optionally, the call status prompt may be that the called user equipment has ringed. Synthesize the reminder that the called user has ringed into the video, which can be combined into the video screen in the form of subtitles. For example, subtitles such as "the called party has ringed", "call connected, and waiting for the user to answer" are synthesized in the video. For the specific process, please refer to 204 and 205 in FIG. 2.

Since the calling user equipment provided by the embodiment of the present invention can be used to control the method of playing the video color ring back tone, the technical effects that can be obtained can refer to the above method embodiments, which will not be repeated here.

Those skilled in the art can clearly understand that for the convenience and conciseness of the description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a division of logical functions. In actual implementation, there may be other divisions, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or software function unit.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention essentially or part of the contribution to the existing technology or all or part of the technical solution can be embodied in the form of a software product, the computer software product is stored in a storage medium , Including several instructions to enable a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in the various embodiments of the present invention. The foregoing storage media include various media that can store program codes, such as a U disk, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present invention, not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still The technical solutions described in the embodiments are modified, or some of the technical features are equivalently replaced; and these modifications or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (22)

A method for controlling the playback of video color ring back tone, characterized in that the method includes: The color ring back tone server receives the call request message, and the call request message carries the calling user ID; The CRBT server sends a call response message to the calling user equipment, and the calling user equipment is a device corresponding to the calling user identity; The CRBT server and the calling user equipment negotiate audio and video media, and after the audio and video media negotiation is complete, send a video CRBT media stream to the calling user equipment. The method according to claim 1, wherein the CRBT server sending the call response message to the calling user equipment comprises: Determining that the call request message carries an indication that the phone application server corresponding to the calling user equipment is capable of playing video CRBT early; The CRBT server sends the call response message to the calling user equipment. The method according to claim 1, wherein the call response message is a 183 message. The method according to claim 1, wherein after receiving the call request message, the CRBT server further comprises: The CRBT server sends a notification message to the call session control function device corresponding to the called user equipment to notify the call session control function device to play the video CRBT in advance for this call. The method according to any one of claims 1-4, further comprising: The CRBT server receives a call status prompt message sent by a telephone application server corresponding to the called user equipment; The CRBT server notifies the calling user of the call status prompt corresponding to the prompt message. The method according to claim 5, wherein the color ring back tone server notifying the calling user of the call status prompt includes: The CRBT server synthesizes the call status prompt into the video CRBT. The method of claim 5, further comprising: The call status prompt is a call failure prompt, and the call failure prompt carries a call failure reason value. A method for controlling the playback of video color ring back tone, characterized in that the method includes: The calling user equipment sends a call request message to the CRBT server; The calling user equipment receives a call response message sent by the color ring back tone server; The calling user equipment and the color ring back tone server perform audio and video media negotiation, and play the video color ring back tone after the audio and video media negotiation is completed. The method according to claim 8, wherein the call request message carries an indication that the calling user equipment is capable of synthesizing video information. The method according to any one of claims 8 to 9, further comprising: The calling user equipment receives a call status prompt message; The calling user equipment synthesizes the call status prompt corresponding to the prompt message into the video color ring back tone. The method according to claim 10, further comprising: The call status prompt is a call failure prompt, and the call failure prompt carries a call failure reason value. A color ring back tone server, characterized in that it includes: A receiving module, configured to receive a call request message, the call request message carrying a calling user identification; A sending module, configured to send a call response message to the calling user equipment, where the calling user equipment is a device corresponding to the calling user identity; A negotiation module, used for audio and video media negotiation with the calling user equipment; The sending module is also used to send a video color ring back tone media stream to the calling user equipment after the audio and video media negotiation is completed. The color ring back tone server according to claim 12, wherein the sending module is configured to send the call response message to the calling user equipment, including: A determining module, configured to determine that the call request message carries an indication that the telephone application server corresponding to the calling user equipment is capable of playing video CRBT early; The sending module is configured to send the call response message to the calling user equipment. The color ring back tone server according to claim 12, wherein the call answering message is a 183 message. The color ring back tone server according to claim 12, wherein after the receiving module receives the call request message, the sending module is further configured to send a notification message to a call session control function device corresponding to the called user equipment. The notification message is used to notify the call session control function device that the video CRBT is played in advance for this call. The color ring back tone server according to any one of claims 12-15, further comprising: The receiving module is further configured to receive a call status prompt message sent by a telephone application server corresponding to the called user equipment; The notification module is used to notify the calling user of the call status prompt corresponding to the prompt message. The color ring back tone server according to claim 16, wherein the notification module is configured to notify the calling user of the call status prompt, including: A video synthesis module is used to synthesize the call status prompt into the video color ring back tone. The color ring back tone server according to claim 17, wherein the call status prompt is a call failure prompt, and the call failure prompt carries a call failure reason value. A calling user equipment is characterized by comprising: Sending module, used to send call request message to the CRBT server; A receiving module, configured to receive a call response message sent by the color ring back tone server; Negotiation module, used for audio and video media negotiation with the CRBT server; The play module is used to play the video ring back tone after the audio and video media negotiation is completed. The calling user equipment according to claim 19, wherein the call request message carries an indication that the calling user equipment is capable of synthesizing video information. The calling user equipment according to any one of claims 19 to 20, further comprising: The receiving module is also used to receive a call status prompt message; The video synthesis module is used to synthesize the call status prompt corresponding to the prompt message into the video color ring back tone. The calling user equipment according to claim 21, wherein the call status prompt is a call failure prompt, and the call failure prompt carries a call failure reason value.

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