WO2010025649A1

WO2010025649A1 - Call and control method, apparatus and system for multimedia ring back tone service

Info

Publication number: WO2010025649A1
Application number: PCT/CN2009/073444
Authority: WO
Inventors: 陈国乔; 杨健
Original assignee: 华为技术有限公司
Priority date: 2008-09-03
Filing date: 2009-08-24
Publication date: 2010-03-11
Also published as: CN101668229A

Abstract

A call and control method, apparatus and system for multimedia ring back tone service are provided, which is related to multimedia ring back tone service, and resolves the problem that the normal voice channel establishment is influenced when the terminal does not have the early media negotiation capability. In the embodiment of the invention, the terminal capability information are carried within the call request originated from the calling terminal, so that the call control entity or application support function entity determines whether the calling terminal supports the multimedia ring back tone service or not, if the calling terminal does not support the multimedia ring back tone service, i.e. the calling terminal does not have the early media negotiation capability, then the request to establish early media negotiation channel between the calling terminal and the media resource treating function entity is not initiated. The embodiment of the invention is mainly used in multimedia ring back tone service system.

Description

The method and device for calling and controlling a multimedia ring tone service, the device and the system for requesting the call and control method, device and system of the multimedia ring tone service are filed on September 3, 2008, with the application number being 200810135543.9 Priority of the Chinese application, the entire contents of which are incorporated herein by reference.

Technical field

The present invention relates to the field of communications, and in particular, to a method and apparatus for calling and controlling a multimedia ring tone service used in communication, and a system using the same.

Background technique

During the session establishment process, after the calling terminal completes dialing, a voice channel is established between the calling terminal and the switch, and the switch instructs the called terminal to ring; if the called terminal does not go off-hook, the call can be passed. The switch sends a ringback tone to the calling terminal, or the ringback tone is played by the calling terminal itself. When the called terminal picks up the phone, a voice channel is established between the called terminal and the switch, so that the calling terminal and the called terminal can pass between the voice channel between the calling terminal and the switch, and between the called terminal and the switch. The voice channel makes a call. In order to effectively utilize the voice channel established between the calling terminal and the switch before the called terminal goes off-hook, the switch sends the color ring tone as the ring back tone to the calling terminal when the called terminal is not off-hook.

In a service such as a videophone, multimedia audio, video, or the like can be used as a ring tone. However, since the amount of data transmitted by these multimedia ring tones is large, the prior art needs to be between the switch and the calling terminal, or An early media channel is established between the switch and the called terminal.

The calling terminal initiates a call through normal call signaling, and carries the information of the called terminal in the call signaling. When the called terminal opens the related multimedia ring tone service, between the CRBT server/switch and the calling terminal. An early media channel is established, and the ring back tone server/switch sends a multimedia ring tone to the calling terminal through the established early media channel. After the called terminal picks up the phone, the early media channel between the ring back tone server/switch and the calling terminal is removed. At the same time, the voice channels of the calling terminal and the switch, the switch and the called terminal are respectively established through signaling, so that the calling terminal and the called terminal communicate.

In implementing the above prior art solutions, the inventors have found that at least the following problems exist in the prior art: 1. During the establishment of the voice call, the ring back tone is transmitted through the voice channel between the calling terminal and the switch. If the ring back tone is implemented by the multimedia ring tone service, the calling terminal does not have the multimedia ring tone service. The ability will cause the calling terminal to not receive the ring back tone normally. The user may hang up because he cannot hear the ring back tone, thus affecting the establishment of the normal voice channel.

2. In the solution adopted by the above videophone service, the default ringing server/switch terminal has the early media negotiation capability and can establish an early media channel with the ring back tone server/switch. When the calling terminal does not have the early media negotiation capability, the calling terminal will regard the signaling of establishing the early media channel as the signaling for establishing the voice channel, and the signaling of the early media channel is removed as the signaling for tearing down the voice channel, resulting in The calling terminal interrupts the communication and affects the establishment of the normal voice channel.

Summary of the invention

The embodiment of the invention provides a call and control method, device and system for a multimedia ring tone service, which does not affect the establishment of a normal voice channel when the terminal does not have early media negotiation capability.

In order to achieve the above objective, the embodiment of the present invention adopts the following technical solutions:

A calling method for a multimedia ring tone service, comprising:

A call request is initiated to the call control entity, where the call request carries terminal capability information and/or multimedia ring tone service capability information.

A method for controlling a multimedia ring tone service includes:

Receiving capability information of the calling terminal;

Determining, according to the capability information, whether the calling terminal supports the multimedia ring tone service;

When the calling terminal does not support the multimedia ring tone service, the request for establishing an early media channel between the calling terminal and the media resource processing function entity is not initiated.

A method for controlling a multimedia ring tone service includes:

Receiving capability information of the calling terminal;

When the calling terminal supports the multimedia ring tone service, a request for establishing an early media channel between the calling terminal and the media resource processing function entity is initiated.

A terminal, comprising:

a call unit, configured to initiate a call request to the call control entity, where the call request carries End capability information and/or multimedia ringtone service capability information.

A multimedia ring tone service control entity includes:

a receiving unit, configured to receive capability information of the calling terminal;

a determining unit, configured to determine, according to the capability information, whether the calling terminal supports the multimedia ring tone service;

A multimedia ring tone service control entity includes:

a receiving unit, configured to receive the capability information of the calling terminal and the multimedia ring tone service capability information; the determining unit, configured to determine, according to the capability information, whether the calling terminal supports the multimedia ring tone service;

a control unit, configured to initiate a request for establishing an early media channel between the calling terminal and the media resource processing function entity when the calling terminal supports the multimedia ring tone service;

And a selecting unit, configured to select a type of the multimedia ring tone service according to the multimedia ring tone service capability information.

A control system for a multimedia ring tone service, comprising:

a calling terminal, configured to initiate a call request to the call control entity, where the call request carries terminal capability information;

a call control entity, configured to receive a call request initiated by the calling terminal, determine, according to the capability information, whether the calling terminal supports the multimedia ring tone service; when the calling terminal does not support the multimedia ring tone service, the calling terminal does not initiate the A request to establish an early media channel between the terminal and the media resource processing functional entity.

A control system for a multimedia ring tone service, comprising:

a call control entity, configured to send terminal capability information in the call request to an application support function entity;

An application support function entity, configured to receive terminal capability information forwarded by the call control entity, and further Determining, according to the capability information, whether the calling terminal supports the multimedia ring tone service; when the calling terminal does not support the multimedia ring tone service, does not initiate an early media channel between the calling terminal and the media resource processing function entity. request.

The call and control method, device, and system for the multimedia ring tone service provided by the embodiment of the present invention, when the calling terminal initiates a call request, the call request carries the capability information of the terminal, in this embodiment, by the call control entity or The application support function entity uses the foregoing capability information to determine whether the calling terminal supports the multimedia ring tone service. In the case that the calling terminal does not support the multimedia ring tone service, there is no need to establish an early stage between the calling terminal and the media resource processing function entity. The media channel, compared with the prior art, whether the calling terminal supports the multimedia ring tone service and needs to establish an early media channel, when the calling terminal cannot receive the ring back tone normally, the user does not hear the user in this embodiment. In the case of the ringback tone and the on-hook, the successful establishment of the normal voice channel is ensured. Similarly, when the calling terminal does not have the early media negotiation capability, the calling terminal in this embodiment does not treat the signaling of the early media channel removal as a teardown. Voice channel signaling to ensure successful establishment of normal voice channels

DRAWINGS

1 is a flowchart of a method for calling a multimedia ring tone service according to Embodiment 1 of the present invention;

2 is a flowchart of an implementation of a multimedia ring tone service control method according to Embodiment 1 of the present invention; FIG. 3 is a flowchart of another implementation of a multimedia ring tone service control method according to Embodiment 1 of the present invention; a block diagram of the terminal in Embodiment 1;

5 is a block diagram of a multimedia ring tone service control entity according to Embodiment 1 of the present invention;

FIG. 6 is another block diagram of a multimedia ring tone service control entity according to Embodiment 1 of the present invention; FIG. 8 is a schematic diagram of a first multimedia ring tone service control system according to Embodiment 1 of the present invention; FIG. 8 is a first embodiment of the present invention; A schematic diagram of a second multimedia ring tone service control system; FIG. 9 is a flowchart of a method for controlling a multimedia ring tone service according to Embodiment 2 of the present invention;

10 is a flowchart of a method for controlling a multimedia ring tone service according to Embodiment 3 of the present invention;

11 is a flowchart of a method for controlling a multimedia ring tone service according to Embodiment 4 of the present invention;

12 is a flowchart of a method for controlling a multimedia ring tone service according to Embodiment 5 of the present invention;

13 is a flowchart of a method for controlling a multimedia ring tone service according to Embodiment 6 of the present invention;

Figure 14 is a block diagram of a call control entity in Embodiment 7 of the present invention; 15 is a block diagram of an application supporting function entity in Embodiment 7 of the present invention;

16 is a schematic structural diagram of a multimedia ring tone service control system according to Embodiment 8 of the present invention.

detailed description

The call and control method, apparatus and system for the multimedia ring tone service according to the embodiment of the present invention are described in detail below with reference to the accompanying drawings.

Example 1:

This embodiment provides a method for calling a multimedia ring tone service. As shown in FIG. 1, the calling method includes the following steps:

The calling terminal initiates a call request to the call control entity, where the call request carries the terminal capability information and/or the multimedia ring tone service capability information. The call control entity in this embodiment may be a call server in the circuit bearer domain ( Call Server) or Call Control Center Server (MSC Server); in the IP Multimedia Subsystem (IMS), it can be Call Session Control Function (CSCF).

This embodiment provides a method for controlling a multimedia ring tone service. As shown in FIG. 2, the control method includes the following steps:

201. Receive a call request initiated by a calling terminal, where the call request carries capability information of the calling terminal.

202. Determine, according to the capability information carried by the calling terminal, whether the multimedia ring tone service is supported. When the calling terminal does not support the multimedia ring tone service, the request for establishing an early media channel between the calling terminal and the media resource processing function entity is not initiated.

This embodiment provides a method for controlling a multimedia ring tone service. As shown in FIG. 3, the control method includes the following steps:

301. Receive terminal capability information forwarded by a control entity.

302. Determine, according to the capability information carried by the calling terminal, whether the multimedia ring tone service is supported. When the calling terminal supports the multimedia ring tone service, a request for establishing an early media channel between the calling terminal and the media resource processing function entity is initiated.

The embodiment further provides a terminal, corresponding to the calling method of the multimedia ring tone service in FIG. As shown in FIG. 4, the terminal includes a calling unit 401.

The calling unit 401 is configured to initiate a call request to the call control entity, where the call request carries terminal capability information and multimedia ring tone capability information.

Corresponding to the control method of the multimedia ring tone service in FIG. 2, the embodiment further provides a multimedia ring tone service control entity. As shown in FIG. 5, the multimedia ring tone service control entity includes a receiving unit 501, a determining unit 502, and a control. Unit (503).

The receiving unit 501 is configured to receive capability information of the calling terminal, and the determining unit 502 is configured to determine, by the multimedia ring tone service control entity, whether the calling terminal supports the multimedia ring tone service according to the capability information; When the calling terminal does not support the multimedia ring tone service, the control unit (503) does not initiate a request for establishing an early media channel between the calling terminal and the media resource processing function entity.

Corresponding to the control method of the multimedia ring tone service in FIG. 2, the embodiment further provides a multimedia ring tone service control entity. As shown in FIG. 6, the application support function entity includes: a receiving unit 501, a determining unit 502, and a control unit. 503. Select unit 504.

The receiving unit 501 is configured to receive the capability information of the calling terminal and the multimedia ringing service capability information. The determining unit 502 is configured to determine, by the multimedia ring tone service control entity, whether the calling terminal supports the terminal terminal according to the capability information of the calling terminal. a multimedia ring tone service; when the calling terminal supports the multimedia ring tone service, the control unit 503 initiates a request for establishing an early media channel between the calling terminal and the media resource processing function entity; the selecting unit 504, And a type for selecting a multimedia ring tone service according to the multimedia ring tone service capability information.

The embodiment further provides a control system for the multimedia ring tone service, as shown in FIG. 7, including a calling terminal 701 and a call control entity 702.

The calling terminal 701 is configured to send 702 a call request to the call control entity, where the call request carries terminal capability information, and the call control entity 702 is configured to receive a call request initiated by the calling terminal 701, and call control. The entity 702 determines whether the calling terminal 701 supports the multimedia ring tone service according to the capability information of the calling terminal 701. When the calling terminal 701 does not support the multimedia ring tone service, the calling terminal 701 and the media resource processing function are not initiated. A request to establish an early media channel between entities.

The embodiment further provides a control system for the multimedia ring tone service, as shown in FIG. The terminal 701, the call control entity 702, and the application support function entity 703 are called.

The calling terminal 701 is configured to initiate a call request to the call control entity 702, where the call request carries terminal capability information, and the call control entity 702 is configured to send the terminal capability information in the call request to the application. Supporting the function entity 703, the application support function entity 703, configured to receive the terminal capability information forwarded by the call control entity 702, and determine, according to the capability information, whether the calling terminal 701 supports the multimedia ring tone service; When the 701 does not support the multimedia ring tone service, the request for establishing an early media channel between the calling terminal and the media resource processing function entity is not initiated.

Through the processing of the call and control method of the multimedia ring tone service, the calling terminal carries the terminal capability information of the calling terminal and/or the multimedia ring tone service capability information in the call request message; before the multimedia ring tone service is triggered, the call is made. The control entity or the application support function entity may use the terminal capability information of the calling terminal to perform pre-determination. If the calling terminal does not support the multimedia ring tone service, the early media between the calling terminal and the media resource processing function entity will not be established. Channel; If the calling terminal supports the multimedia ring tone service, the appropriate ring tone service is selected according to the multimedia ring tone service capability information of the calling terminal. In this way, the early media channel connection failure occurs because the calling terminal does not support the early media negotiation, and the user hangs up because the ringback tone is not heard, thereby ensuring the successful establishment of the normal voice channel; likewise, when the calling terminal When there is no early media negotiation capability, the calling terminal in this embodiment does not regard the signaling of the early media channel removal as the signaling for tearing down the voice channel, thereby ensuring the successful establishment of the normal voice channel.

Example 2:

The application scenario of this embodiment is a CS (Circuit Switched) domain network of the Call Server, wherein the calling terminal accesses the communication network through the Call Server, and the calling terminal connects to the Call Server through the gateway. In this embodiment, the call control entity is implemented by the Call Server, and the AS-FE (Application Support Functional Entities) and the MRP-FE (Media Resource Processing Function Entity) connected to the Call Server are set; The multimedia ring tone service in the example includes a multimedia ring back tone, a multimedia color ring, and a multimedia color picture service.

As shown in FIG. 9, the method for controlling a multimedia ring tone service in this embodiment includes the following steps: 901. In order to initiate a multimedia call to the called terminal, the calling terminal sends a request B message, that is, a call request message, to the Call Server, where the request B message includes the terminal capability information of the calling terminal and/or the multimedia ring tone service capability. information. The Request B message in this embodiment does not limit the specific method of carrying the terminal capability information and/or the multimedia ring tone service capability information.

902. In order to notify the called terminal to ring, the Call Server in this embodiment may further forward the request B message to the called terminal, and the Call Server may cache the terminal capability information and/or multimedia carried in the Request B message. Ring tone service capability information.

Optionally, the Call Server may modify the Request B message to be sent to the called terminal, so that in the modified message, the Call Server may request the called terminal to return the corresponding terminal capability information and/or the multimedia ring tone service capability. information.

903. After the called terminal receives the Request B message, it sends a ring to remind the user to answer, and the called terminal returns a response message (response) to the Call Server.

If the Call Server modifies the Request B message and requests the called terminal to return the terminal capability information and/or the multimedia ring tone service capability information, the called terminal may carry the terminal capability information and/or the multimedia ring of the called terminal in the response message. Sound service capability information.

904. If the called terminal subscribes to the CRBT (Color Ring Back Tone), the Call Server determines, according to the terminal capability information, whether the calling terminal supports the multimedia ring tone service, if the calling terminal does not support the multimedia ring tone. For the voice service, there is no need to establish an early media channel, and directly wait for the called terminal to answer. Specifically, step 905 to step 911 are not performed; step 912 is performed; step 9013, step 914 is not performed; step 915, step 916 is performed. If the calling terminal supports the multimedia ring tone service, step 905 is performed.

905. The Call Server selects a type of the multimedia ring tone service according to the multimedia ring tone service capability information.

906. The Call Server sends a CRBT request message (request message) to the AS-FE to notify the AS-FE to trigger the corresponding multimedia ring tone service.

907. The AS-FE sends a CRBT media request (request CRBT media) message to the MRP-FE to request the related CRBT media resource from the MRP-FE.

In the above steps 906 and 907, the Call Server needs to select the selected multimedia ring tone service class. The type is sent to the MRP-FE through the AS-FE.

908. The MRP-FE returns a CRBT media response (response CRBT media) message to the AS-FE, in response to the CRBT media request sent by the AS-FE, and carries the CRBT session information therein.

909. The AS-FE sends a CRBT response (Call CRBT) message to the Call Server, in response to the CRBT request message sent by the Call Server, and carries the CRBT session information in the CRBT response message.

910. The Call Server sends a CRBT connection (connect CRBT) message to the calling terminal, instructing the calling terminal to perform a media negotiation process with the MRP-FE to establish an early media channel between the calling terminal and the MRP-FE.

911. The MRP-FE sends the multimedia content corresponding to the selected type to the calling terminal by using an early media channel, that is, establishing a media stream between the MRP-FE and the calling terminal. In this way, the calling terminal can listen to the ring back tone of the CRBT service pre-configured by the called terminal.

912. The called terminal picks up the phone and responds. At this time, the called terminal sends a answer (answer) message to the Call Server, and responds to the call request of the calling terminal.

913. After receiving the answer (answer) message sent by the called terminal, the Call Server sends a Notify message to the AS-FE, where the message is used to control to stop playing the ring back tone.

914. The AS-FE forwards the Notify message sent by the Call Server to the MRP-FE, indicating that the MRP-FE stops playing the ring back tone.

915. The Call Server sends a connection establishment message to the calling terminal, indicating that the calling terminal establishes a connection with the called terminal.

916. The calling terminal and the called terminal transmit the media stream of the call through the established connection. In this way, a normal call process is completed.

In this embodiment, the AS-FE can also determine whether the calling terminal supports the multimedia ring tone service, and selects the type of the multimedia ring tone service. The specific implementation steps are basically the same as the foregoing method, as shown by the dotted line in FIG. The difference is that steps 904 to 906 in the above method need to be replaced by the following steps:

904'. If the called terminal subscribes to the CRBT (Personalized Ringback Tone Service), the Call Server sends the received terminal capability information and/or the multimedia ring tone service capability information to the AS-FE. 905 ′, the AS-FE determines whether the calling terminal supports the multimedia ring tone service according to the terminal capability information. If the calling terminal does not support the multimedia ring tone service, the AS does not need to establish an early media channel, and directly waits for the called terminal to respond. Specifically, step 906', step 907 to step 911 are not performed; step 912 is performed; step 913, step 914 is not performed; step 915, step 916 is performed. If the calling terminal supports the multimedia ring tone service, step 906' is performed.

906 ′, the AS-FE selects a type of the multimedia ring tone service according to the multimedia ring tone service capability information.

In this embodiment, the step of the Call Server determining whether the calling terminal supports the multimedia ring tone service and selecting the multimedia ring tone service may be performed before the Call Server notifies the called terminal to ring.

Through the processing of the call and control method of the multimedia ring tone service, the calling terminal carries the terminal capability information of the calling terminal and/or the multimedia ring tone service capability information in the call request message; before the multimedia ring tone service is triggered, the call The server or the AS-FE can use the terminal capability information of the calling terminal to perform pre-determination. If the calling terminal does not support the multimedia ring tone service, the early media channel between the calling terminal and the media resource processing function entity is not established; If the calling terminal supports the multimedia ring tone service, the appropriate ring tone service is selected according to the multimedia ring tone service capability information of the calling terminal. In this way, the early media channel connection failure occurs because the calling terminal does not support the early media negotiation, and the user hangs up because the ringback tone is not heard, thereby ensuring the successful establishment of the normal voice channel; likewise, when the calling terminal When there is no early media negotiation capability, the calling terminal in this embodiment does not regard the signaling of the early media channel removal as the signaling for tearing down the voice channel, thereby ensuring the successful establishment of the normal voice channel.

Example 3:

This example is an embodiment in which the terminal capability of the multimedia ring tone is carried by means of a videophone of the CS (circuit). In this solution, the calling terminal accesses the core network of the PLMN (Public Land Mobile Network) through the MSC Server A, where the MSC Server A completes the function of the call control entity, and completes the multimedia ring tone through the multimedia ring back tone platform. The function of the media resource processing function entity is implemented. The multimedia ring tone service in this embodiment includes a multimedia ring back tone, a multimedia color ring, and a multimedia color picture service. As shown in FIG. 10, the method for controlling a multimedia ring tone service in this embodiment includes the following steps:

1001. In order to initiate a multimedia call to the called terminal, the calling terminal sends a SETUP message to the MSC Server A, where the message carries the terminal capability information and the supported multimedia ring service capability information. In this example, the BC_IE (Bearer Capacity Information Element) is used to indicate the capability of the videophone supported by the terminal, and is carried by the UUI (User-to-User IE, User-to-User) cell. The multimedia ring tone service capability supported by the terminal.

1002. The MSC Server A initiates a query location information (SRI) request to the HLR (Home Location Register) B to obtain routing information of the called terminal.

1003. The MSC Server A determines whether the calling terminal supports the multimedia ring tone service according to the terminal service capability sent by the calling terminal. If the calling terminal does not support the multimedia ring tone service, the MSC Server A does not need to establish an early media channel, and directly waits for the called terminal to answer. . Specifically, step 1004 is not performed; step 1005 to step 1011 is performed; step 1012, step 1013 is not performed; step 1014 to step 1016 is performed; step 1017 to step 1023 is not performed; step 1024 to step 1026 is performed; step 1027 is not performed. Step 1029; Step 1030 to Step 1032 are performed. If the calling terminal supports the multimedia ring tone service, step 1004 is performed.

1004. The MSC Server A selects a type of the multimedia ring tone service according to the multimedia ring tone service capability information.

1005. HL B initiates a roaming number request (PRN) to the called MSC Server B to obtain a roaming number.

In the case that MSC Server B supports pre-paging, MSC Server B initiates a pre-paging to the called terminal.

1006. MSC Server B returns the roaming number to HLR B.

1007. The HLR B returns the roaming number of the called terminal to the MSC Server A, and carries information about whether the called terminal customizes the multimedia ring tone service.

1008. After obtaining the mobile station roaming number (MSRN) of the called terminal, the MSC Server A initiates a call process (Call_Proceeding) to the calling terminal.

1009. The MSC Server A initiates an ISDN user part initial address cancellation to the MSC Server B. Information (ISUP IAM). If the called terminal subscribes to the calling number display service, the ISUP IAM message needs to carry the calling number.

1010. If the MSC Server B does not initiate the pre-paging when taking the roaming number, the MSC Server B initiates a paging request message (Paging) to the called terminal. If the MSC Server B initiates the pre-paging when taking the roaming number, This step can be omitted.

1011. The called terminal returns a paging response message (Paging_rsp) to the MSC Server B.

1012. The MSC Server B sends a SETUP message to the called terminal, where the message carries the terminal capability information of the calling terminal, and the UUI of the message carries a requirement field that requires the called terminal to report the service capability.

1013. The called terminal returns a call confirmation (CALL CONFIRMED) message to the MSC Server B, indicating that the videophone can be supported; and the UUI carries the multimedia ring tone service capability supported by the called terminal.

1014. After the called terminal rings, the called terminal returns a ringing (ALERTING) message to the MSC Server B.

1015. The MSC Server B returns a Call Control Protocol Address Full Message (BICC ACM) to the MSC Server A. The MSC Server B carries the terminal capability information and/or the multimedia ring tone service capability information of the called terminal in the returned address full message.

1016. The MSC Server A returns a ringing ALERTING message to the calling terminal.

1017. When the called terminal customizes the multimedia ring tone service, the MSC Server A initiates a call control protocol initialization address message (BICC IAM) to the multimedia ring tone platform, and carries the selected multimedia ring tone service type information in the message.

1018. The multimedia ring back tone platform returns a call control protocol address full message (BICC ACM) to the MSC Server A, where the call control protocol address full message carries the multimedia ring tone service type to be carried out.

1019. The MSC Server A determines, according to the selection result information returned by the multimedia ring back tone platform, whether the multimedia ring tone service type is supported between the calling terminal and the called terminal. If not, the failure message is returned, and the multimedia ring tone service is interrupted. Ensure the normal development of videophones. Specifically, step 1020 to step 1023 are not performed; step 1024 to step 1026 are performed; step 1027 is not performed. Go to step 1029; Step 1030 to step 1032 are performed. If so, step 1021 is performed.

1020. After receiving the address full message (ACM) sent by the CRBT platform, the MSC Server A sends the connection signaling (CONNECT) to the calling terminal, and simultaneously listens to whether the MSC Server B of the called terminal has a return message.

1021: The calling terminal returns a CONNECT ACK message to the MSC Server A.

1022. An early media channel is established between the calling terminal and the multimedia ring back tone platform. The early media channel in this embodiment is an H.245 (Multimedia Communication Control Protocol) channel.

1023. After the early media channel of the H.245 protocol is established between the calling terminal and the multimedia ring back tone platform, the calling terminal can view the multimedia ring tone information played by the multimedia ring back tone platform.

1024. The called terminal picks up the phone and sends a response message (CONNECT) to the MSC Server B.

1025. The MSC Server B of the called terminal returns a Call Control Protocol Reply message (BICC ANM) to the MSC SERVERA of the calling terminal, so that the calling terminal connects with the called terminal.

1026. The MSC Server B of the called terminal returns a connection confirmation (CONNECT ACK) to the called terminal.

1027. The MSC Server A of the calling terminal sends a call control protocol release (BICC Release) message to the multimedia ring back tone platform, so that the early media channel of the H.245 protocol is removed between the multimedia ring back tone platform and the calling terminal.

1028. The early media channel of the H.245 protocol is removed between the multimedia ring back tone platform and the calling terminal.

After the early media channel of H.245 is removed, the multimedia ring back tone platform returns a call control protocol release complete (BICC Release Complete) message to the MSC Server A of the calling terminal.

1030. Establish an H.245 protocol channel between the calling terminal and the called terminal.

1031. The calling terminal and the called terminal use the established channel to make a call.

1032. After the videophone call is completed, the channel and the underlying circuit carrying process of the H.245 protocol are removed between the calling terminal and the called terminal.

The multimedia ring back tone platform in this embodiment may also be added to the function of determining, which is equivalent to the determination of the AS-FE in Embodiment 2 being implemented on the multimedia ring back tone platform. In this case, the specific implementation steps are equivalent to those described in FIG. , just do not need to perform step 1003 and step 1004, and replace step 1017 with 1017', as follows: 1017', when the called terminal customizes the multimedia ring tone service, the MSC Server A initiates a call control protocol initialization address message (BICC IAM) to the multimedia ring back tone platform, and carries the terminal capability information of the calling terminal and/or in the message. Or multimedia ring tone service capability information. The multimedia ring back tone platform receives the terminal capability information of the calling terminal and the supported multimedia ring tone service capability information sent by the MSC Server A, and determines whether the calling terminal can support the multimedia ring tone service according to the terminal capability of the calling terminal, if the main If the terminal does not support the multimedia ring tone service, it does not need to establish an early media channel, and directly waits for the called terminal to answer. Specifically, step 1018 to step 1023 are not performed; step 1024 to step 1026 are performed; steps 1027 to 1029 are not performed, and steps 1030 to 1032 are performed. If the calling terminal supports the multimedia ring tone service, the multimedia ring back tone platform selects the type of the multimedia ring tone service according to the multimedia ring tone service capability information of the calling terminal.

Through the processing of the call and control method of the multimedia ring tone service, the calling terminal carries the terminal capability information of the calling terminal and/or the multimedia ring tone service capability information in the call request message; before triggering the multimedia ring tone service, the MSC The Server A or the multimedia ring back tone platform can use the terminal capability information of the calling terminal to perform pre-determination. If the calling terminal does not support the multimedia ring tone service, the early media channel between the calling terminal and the media resource processing function entity will not be established. If the calling terminal supports the multimedia ring tone service, the appropriate ring tone service is selected according to the multimedia ring tone service capability information of the calling terminal. In this way, the early media channel connection failure occurs because the calling terminal does not support the early media negotiation, and the user hangs up because the ringback tone is not heard, thereby ensuring the successful establishment of the normal voice channel; likewise, when the calling terminal When there is no early media negotiation capability, the calling terminal in this embodiment does not regard the signaling of the early media channel removal as the signaling for tearing down the voice channel, thereby ensuring the successful establishment of the normal voice channel.

Example 4:

This example is an embodiment of implementing terminal capability carrying of multimedia ring tones by means of an IMS model. In this solution, terminal A accesses the IMS system through the S-CSC-FE (Serving Call Session Function Entity), and implements the multimedia ring tone service by using the IMS system. In this embodiment, the call control entity is implemented by the S-CSC-FE, and the AS-FE (application support function entity) and the MR-FE (media resource processing function entity) connected to the S-CSC-FE are set; The multimedia ring tone service in the embodiment includes a multimedia ring back tone, a multimedia color ringing, and a multimedia color picture service. As shown in FIG. 11, the method for controlling a multimedia ring tone service in this embodiment includes the following steps:

1101. The calling terminal sends a call request (request B) message to the serving call session function entity (S-CSC-FE). And carrying the terminal capability information of the calling terminal and/or the multimedia ring tone service capability information in the message.

When the called terminal subscribes to the multimedia ring tone service, the S-CSC-FE determines whether the calling terminal supports the multimedia ring tone service according to the terminal capability information carried by the calling terminal in the call request message. If the calling terminal does not support the multimedia ring tone service, it is not necessary to establish an early media channel, and directly wait for the called terminal to answer. Specifically, step 1103 is not performed; step 1104 to step 1106 are performed; step 1107 to step 1113 are not performed; step 1114 is performed; step 1115, step 1116 is not performed; and step 1117 to step 1120 is performed. If the calling terminal supports the multimedia ring tone service, step 1103 is performed.

1103. The S-CSC-FE selects a type of the multimedia ring tone service according to the multimedia ring tone service capability information.

1104. The S-CSC-FE sends a request (request) message to the AS-FE. When the calling terminal supports the multimedia ring tone service, the message includes the selected multimedia ring tone service type, thereby triggering a specific multimedia ring tone service. When the calling terminal does not support the multimedia ring tone service, the message does not include the multimedia ring tone service type.

1105. In order to notify the called terminal to ring, the AS-FE sends a call request (request B) message to the called terminal through the IMS network.

Optionally, a message may be carried in the request B message, and the called terminal is required to carry the terminal capability information of the called terminal and the supported multimedia ring tone service capability information in the response response.

1106. The called terminal returns a response (response) message to the AS-FE.

If the AS-FE requires the called terminal to submit the terminal capability information and the multimedia service capability information of the called terminal, the message includes the terminal capability information of the called terminal and/or the multimedia ringtone service capability information.

1107. The AS-FE sends a media request (request media CRBT) message to the MR-FE, and requests the CRBT media to the MR-FE, where the message includes the selected multimedia ringtone service type. 1108. The MR-FE sends a response media CRBT message to the AS-FE, in response to the CRBT media request sent by the AS-FE, and carries the CRBT session information therein.

1109. The AS-FE returns a response message to the S-CSC-FE, and carries the CRBT early media session description and the terminal media response of the called terminal.

1110. The S-CSC-FE delivers the response message to the calling terminal.

1111. The calling terminal responds to the early media carried in the response message sent by the S-CSC-FE, and the result of the response is included in the acknowledgement character (ACK) message and sent to the S-CSC-FE.

1112. The S-CSC-FE passes the ACK request to the AS-FE.

1113. The AS-FE passes the ACK request to the MR-FE.

1114. The called terminal generates a ringing, and simultaneously sends a ringing message to the AS-FE.

1115. The AS-FE sends a notify CRBT message to the MR-FE, and the message indicates that the MR-FE establishes an early media channel with the calling terminal.

1116. The MRP-FE sends the multimedia content corresponding to the selected type to the calling terminal through an early media channel, that is, establishes a media stream between the MRP-FE and the calling terminal. In this way, the calling terminal can listen to the ring back tone of the CRBT service pre-configured by the called terminal.

1117. The called terminal sends a response (answer) message to the AS-FE to answer the entire call session.

1118. The AS-FE forwards an answer message to the S-CSC-FE, and answers the entire call session.

1119. The S-CSC-FE forwards an answer message to the calling terminal, and answers the entire call session. If the calling terminal establishes an early media channel with the MR-FE, the early media channel is removed. If not, the early media channel is removed. In the early media channel, this step only answers the entire call session, and there is no removal of the early media channel.

1120. The calling terminal and the called terminal complete the call by establishing a connection.

In this embodiment, the AS-FE can also determine whether the calling terminal supports the multimedia ring tone service, and selects the type of the multimedia ring tone service. The specific implementation steps are basically the same as the foregoing methods, as shown in FIG. Step 1102 and step 1103 are performed, and step 1104 is replaced by 1104', as follows: 1104' The S-CSC-FE sends a request (request) message to the AS-FE, where the message carries the terminal capability information of the calling terminal and/or the multimedia ring tone service capability information. The AS-FE determines whether the calling terminal supports the multimedia ring tone service according to the terminal capability information of the calling terminal sent by the S-CSC-FE. If the calling terminal does not support the multimedia ring tone service, it is not necessary to establish an early media channel, and directly wait for the called terminal to answer. Specifically: performing step 1105, step 1106; not performing step 1107 to step 1113; performing step 1114; not performing step 1115, step 1116; performing step 1117 to step 1120; if the calling terminal supports multimedia ring tone service, AS-FE Then, the type of the multimedia ring tone service is selected according to the multimedia ring tone service capability information of the calling terminal.

Through the processing of the call and control method of the multimedia ring tone service, the calling terminal carries the terminal capability information of the calling terminal and/or the multimedia ring tone service capability information in the call request message; before triggering the multimedia ring tone service, S - The CSC-FE or the AS-FE can use the terminal capability information of the calling terminal to perform pre-determination. If the calling terminal does not support the multimedia ring tone service, the early stage between the calling terminal and the media resource processing function entity will not be established. Media channel; If the calling terminal supports the multimedia ring tone service, the appropriate ring tone service is selected according to the multimedia ring tone service capability information of the calling terminal. In this way, the early media channel connection failure occurs because the calling terminal does not support the early media negotiation, and the user hangs up because the ringback tone is not heard, thereby ensuring the successful establishment of the normal voice channel; likewise, when the calling terminal When there is no early media negotiation capability, the calling terminal in this embodiment does not regard the signaling of the early media channel removal as the signaling for tearing down the voice channel, thereby ensuring the successful establishment of the normal voice channel.

This embodiment is an implementation principle of applying a multimedia ring tone service in an IMS system. The implementation manner will be described below with reference to Embodiment 5 and Embodiment 6.

Example 5

This example is an embodiment of implementing terminal capability carrying of multimedia ring tones by means of an IMS model. In this solution, terminal A accesses the IMS system through the P-CSC-FE (Proxy Call Session Control Function Entity), and implements the multimedia ring tone service by using the IMS system. In this system, the call control entity is implemented by S-CSC-FE, and CRBT AS-FE (application support function entity) and CRBT MRC/P-FE (media resource processing function entity) connected to S-CSC-FE are set. The multimedia ring tone service in this embodiment includes a multimedia ring back tone, a multimedia color ring, and a multimedia color picture service. As shown in FIG. 12, the method for controlling a multimedia ring tone service in this embodiment includes the following steps:

1201. The calling terminal sends an invitation (INVITE) request to the P-CSC-FE. And carrying the terminal capability information and/or the multimedia ring tone service capability information in the INVITE request.

1202. The P-CSC-FE sends the INVITE request carrying the capability information of the terminal and/or the capability of the multimedia ring tone service to the S-CSC-FE.

1203. When the called terminal subscribes to the CRBT service, the S-CSC-FE determines whether the CRBT service is triggered by determining the terminal capability information carried in the request. If the calling terminal does not support the multimedia ring tone service, the S2C does not need to establish the CRBT service. The early media channel directly waits for the called terminal to answer. Specifically, step 1204 is not performed; step 1205 to step 1027 is performed; step 1208 to step 1218 is not performed; step 1219 to step 1221 is performed; step 1222 to step 1226 is not performed; steps 1227 to 1232 are performed. If the calling terminal supports the multimedia ring tone service, step 1204 is performed.

1204. The S-CSC-FE selects a type of the multimedia ring tone service according to the multimedia ring tone service capability information.

1205. The S-CSC-FE sends the INVITE request to the CRBT AS-FE. When the calling terminal supports the multimedia ring tone service, the message carries the selected multimedia ring tone type; when the calling terminal does not support the multimedia ring tone service, the message does not carry the multimedia ring tone type.

1206. The CRBT AS-FE forwards the initial INVITE request message to the called terminal. Optionally, the CRBT AS-FE may require the called terminal to carry its own terminal capability information and/or multimedia ring tone service capability information in the response response message.

1207. The called terminal generates ringing, and sends a (180 (ringing)) response response to the CRBT AS-FE. At the same time, the called terminal starts the process of resource negotiation.

If the CRBT AS-FE requires the called terminal to carry its own terminal capability information and/or multimedia ringing service capability information, the response message carries the terminal capability information of the called terminal and/or the multimedia ring tone service capability information.

1208. The CRBT AS-FE sends an INVITE request to the CRBT MRC/P-FE, and the message carries the selected multimedia ring tone type to request the CRBT media resource from the CRBT MRC P-FE.

1209, CRBT MRC/P-FE returns a response to CRBT service to CRBT AS-FE (CRBT Answer), which is a 200 OK message.

1210. The CRBT AS-FE sends a reliable response (CRBT Answer) to the P-CSC-FE, which is 183 message.

1211. The P-CSC-FE forwards a reliable response (CRBT Answer) to the calling terminal, that is, 183 message.

1212. The calling terminal confirms the temporary response (CRBT Answer) by means of a (PRACK) request, that is, 183 message.

1213. The P-CSC-FE forwards (PRACK) request to the CRBT AS-FE.

1214. The CRBT AS-FE sends a corresponding response, that is, a 200 OK message, to the P-CSC-FE according to the received (PRACK) request.

1215. The P-CSC-FE sends a response corresponding to the calling terminal, that is, a 200 OK message.

1216. The CRBT AS-FE sends an (ACK) request message to the CRBT MRC/P-FE. Instructs the CRBT MRC/P-FE to establish an early media channel with the calling terminal.

1217. The CRBT AS-FE sends an INFO request to the CRBT MRC/P-FE and instructs it to start playing the multimedia ringtone content for the calling terminal.

The 1218 CRBT MRC/P-FE establishes an early media channel with the calling terminal and plays the multimedia ringtone content to the calling terminal.

1219. The CRBT AS-FE forwards the Ringing message, that is, the 180 message, received from the called terminal to the P-CSC-FE.

1220. The P-CSC-FE forwards a ringing message, that is, a 180 message, to the calling terminal.

1221. The called terminal picks up the phone and answers the call. The called terminal sends a response (UE-B Answer), that is, a 200 OK message, to the CRBT AS-FE, and carries the response of the called terminal to the calling terminal media request.

1222. The CRBT AS-FE sends an (ACK) request to the called terminal according to the received response (UE-B Answer), that is, the 200 OK message.

1223. The CRBT AS-FE sends a (re-INVITE) request without the SDP (Session Description Protocol) to the called terminal.

1224. The called terminal returns an response response to the CRBT AS-FE according to the (re-INVITE) request. (UE-B Offer), that is, a 200 OK message, and carries the media request of the called terminal therein.

1225. After receiving the response (UE-B Offer), that is, the 200 OK message, the CRBT AS-FE sends a termination session (BYE) request to the CRBT MRC P-FE. The CRBT MRC/P-FE will stop playing CRBT content upon receiving the request.

1226, CRBT MRC/P-FE stops playing CRBT content, and returns a response response to the CRBT AS-FE, that is, 200 OK message.

1227. The CRBT AS-FE returns a response (UE-B Offer) to the P-CSC-FE for the INVITE request originally initiated by the calling terminal, that is, a 200 OK message. The P-CSC-FE can use this message for charging.

1228. The P-CSC-FE forwards the response (UE-B Offer), that is, a 200 OK message to the calling terminal.

1229. The calling terminal sends a request (UE A Answer) to the P-CSC-FE, that is, an ACK message.

1230. The P-CSC-FE sends a request (UE A Answer), that is, an ACK message to the CRBT AS-FE.

1231. The CRBT AS-FE forwards the message to the called terminal. After the called terminal receives the message, the session is established and a normal call is started.

1232. The calling terminal establishes a voice channel with the called terminal to complete the call.

In this embodiment, the CRBT AS-FE can also determine whether the calling terminal supports the multimedia ring tone service, and selects the type of the multimedia ring tone service. The specific implementation steps are basically the same as the above methods, as shown in FIG. 12, but not Step 1203, step 1204, and step 1205 are replaced by 1205', as follows:

1205', the S-CSC-FE sends the INVITE request to the CRBT AS-FE, where the message carries the terminal capability information and the multimedia ring tone capability information of the calling terminal. When the called terminal subscribes to the multimedia ring tone service, the CRBT AS-FE determines whether the calling terminal supports the multimedia ring tone service according to the capability information of the terminal sent by the P-CSC-FE. If the multimedia ring tone service is not supported, There is no need to establish an early media channel and wait directly for the called terminal to answer. Specifically, step 1205 to step 1027 are performed; step 1208 to step 1218 are not performed; step 1219 to step 1221 are performed; Step 1222 to step 1226 are performed; steps 1227 to 1232 are performed. If supported, the appropriate ring tone service type is selected according to the multimedia ring tone service capability of the terminal sent by the P-CSC-FE.

In this embodiment, the called terminal generates ringing, and sends a (180 (Rmgmg)) response response to the CRBT AS-FE. At the same time, the step of the called terminal starting the resource negotiation process can be placed in the CRBT AS-FE. This is done after the (ACK) request message is sent to the CRBT MC/P-FE.

In this embodiment, the CRBT AS-FE sends the INVITE request to the CRBT MRC/P-FE, and the message carries the selected multimedia ringtone type, so as to request the CRBT media resource from the CRBT MRC P-FE, the The P-CSC-FE sends this INVITE request to the CRBT AS-FE.

In this embodiment, the CRBT AS-FE sends an (ACK) request message to the CRBT MRC/P-FE. The step of instructing the CRBT MRC/P-FE to establish an early media channel with the calling terminal may be performed after the P-CSC-FE forwards (PRACK) request to the CRBT AS-FE.

Through the processing of the call and control method of the multimedia ring tone service, the calling terminal carries the terminal capability information of the calling terminal and/or the multimedia ring tone service capability information in the call request message; before triggering the multimedia ring tone service, S - The CSC-FE or the CRBT AS-FE can use the terminal capability information of the calling terminal to make a pre-determination. If the calling terminal does not support the multimedia ring tone service, the caller terminal and the media resource processing function entity are not established. Early media channel; If the calling terminal supports the multimedia ring tone service, the appropriate ring tone service is selected according to the multimedia ring tone service capability information of the calling terminal. In this way, the early media channel connection failure occurs because the calling terminal does not support the early media negotiation, and the user hangs up because the ringback tone is not heard, thereby ensuring the successful establishment of the normal voice channel; likewise, when the calling terminal When there is no early media negotiation capability, the calling terminal in this embodiment does not regard the signaling of the early media channel removal as the signaling for tearing down the voice channel, thereby ensuring the successful establishment of the normal voice channel.

Example 6:

This example is an embodiment of implementing terminal capability carrying of multimedia ring tones by means of an IMS model. In this solution, terminal A accesses the IMS system through the S-CSC-FE (Serving Call Session Function Entity), and implements the multimedia ring tone service by using the IMS system. In this system, call control The body is implemented by S-CSC-FE, and CRBT AS-FE (application support function entity) and CRBT MRC P-FE (media resource processing function entity) connected to S-CSC-FE are set; multimedia in this embodiment The ring tone service includes multimedia ring back tone, multimedia color burst and multimedia color picture service.

As shown in FIG. 13, the method for controlling the multimedia ring tone service in this embodiment includes the following steps:

1301. The calling terminal sends an INVITE (offer) request to the S-CSC-FE to initiate a call. In order to establish a session process, the calling terminal carries terminal capability information and/or multimedia ring tone service capability information in the INVITE request.

1302: When the called terminal has subscribed to the CRBT service, the S-CSC-FE determines whether the calling terminal supports the multimedia ring tone service according to the terminal capability information carried in the call information. If yes, perform step 1303. Support does not require the establishment of an early media channel, directly waiting for the called terminal to answer. Specifically, step 1303 is not performed; step 1304 to step 1306 is performed; step 1307 to step 1317 are not performed; step 1318, step 1319 is performed; 1320 to step 1322 are not performed; step 1323 to step 1326 are performed; step 1327 is not performed. 1328; Perform step 1329.

1303. The S-CSC-FE selects a type of the multimedia ring tone service according to the multimedia ring tone service capability information.

1304. The S-CSC-FE forwards the (INVITE (offer)) request to the CRBT AS-FE. When the calling terminal supports the multimedia ring tone service, the request carries the selected multimedia ring tone type; when the calling terminal does not support the multimedia ring tone service, the message does not include the selected multimedia ring tone service type.

1305. The CRBT AS-FE sends the (INVITE (offer)) request to the called terminal. The CRBT AS-FE will cache the terminal capability information and/or multimedia ring tone service capability information of the calling terminal. At the same time, the called terminal is required to report related terminal capability information and/or multimedia ring tone service capability information in the Invite request.

1306. The called terminal returns a reliable answer (ie, 183) message to the CRBT AS-FE, and carries relevant terminal capability information and/or multimedia ring tone service capability information therein.

1307. The CRBT AS-FE sends an (INVITE) request to the CRBT MRC P-FE requesting the CRBT MRC/P-FE to provide the corresponding CRBT resource.

1308, CRBT MRC/P-FE returns a CRBT offer to the CRBT AS-FE, ie 200 OK message, telling the resource reservation has been completed.

1309. The CRBT AS-FE sends a response (answer+CRBT offer), that is, 183 message to the S-CSC-FE.

1310. The S-CSC-FE sends a response (answer+CRBT offer), that is, 183 to the calling terminal. 1311. The calling terminal sends a response response (CRBT answer) to the S-CSC-FE, that is, the PRACK message is used to confirm a reliable temporary response.

1312. The S-CSC-FE sends a response (CRBT answer), that is, a PRACK message to the CRBT AS-FE.

1313. The CRBT AS-FE sends a response (answer) to the called terminal, that is, the PRACK message confirms the temporary response.

1314. The CRBT AS-FE also forwards this response (CRBT answer), that is, the PRACK request message, to the CRBT MRC/P-FE.

1315. The called terminal returns a response response to the CRBT AS-FE, that is, a 200 OK message to confirm the previous PRACK request.

1316. The CRBT AS-FE returns an acknowledgement response, ie, a 200 OK message, to the S-CSC-FE to confirm the previous PRACK request.

1317. The S-CSC-FE returns an acknowledgement response to the calling terminal, that is, a 200 OK message to confirm the previous PRACK request.

1318. The called terminal sends a ringing response (ringing) to the CRBT AS-FE, that is, a 180 message indicating that the terminal has ringed.

1319. The CRBT AS-FE sends a ringing response (180) to the calling terminal through the S-CSC-FE.

1320. The CRBT AS-FE sends an (INFO) request to the CRBT MRC P-FE to inform the CRBT MRC/P-FE to start the CRBT service playback process.

1311. The CRBT MRC P-FE sends an acknowledgement (INFO) to the CRBT AS-FE, which is a 200 OK message. At the same time, the CRBT MRC P-FE starts playing the CRBT service to the calling terminal.

1322. Establish an early media channel, and CRBT MRC/P-FE starts to play CRBT service to the calling terminal. 1323. The called terminal picks up the call and answers the call, and sends a response response, that is, a 200 OK message, to the CRBT AS-FE.

1324. The CRBT AS-FE sends an acknowledgement response, that is, a 200 OK message, to the calling terminal through the S-CSC-FE.

1325. The calling terminal sends an (ACK) request to the CRBT AS-FE through the S-CSC-FE to confirm (200 OK) the response.

1326. The CRBT AS-FE sends the (ACK) request to the called terminal.

1327. At the same time, the CRBT AS-FE sends a (BYE) request message to the CRBT MRC P-FE, informing the CRBT MRC that the P-FE stops playing CRBT.

1328. The CRBT MRC/P-FE sends a response to the CRBT AS-FE, that is, a 200 OK message to confirm the BYE request, and stops playing the CRBT to the calling terminal.

1329. The calling terminal establishes a voice channel with the called terminal to complete the call.

In this embodiment, the CRBT AS-FE can also determine whether the calling terminal supports the multimedia ring tone service, and selects the type of the multimedia ring tone service. The specific implementation steps are basically the same as the above methods, as shown in FIG. Step 1302 and step 1303 need to be performed, and step 1304 is replaced by 1304', as follows:

1304. The S-CSC-FE forwards the (INVITE (offer)) request to the CRBT AS-FE, and carries the terminal capability of the calling terminal and the multimedia ring tone service capability message in the message. The CRBT AS-FE determines whether the calling terminal supports the multimedia ring tone service according to the terminal capability information of the calling terminal carried in the information. If yes, the process proceeds to step 1305. If it is not supported, you do not need to establish an early media channel and wait directly for the called terminal to answer. Specifically, step 1305, step 1306 is performed; step 1307 to step 1317 are not performed; step 1318, step 1319 is performed; 1320 to step 1322 are not performed; step 1323 to step 1326 are performed; step 1327, step 1328 is not performed; .

Through the processing of the call and control method of the multimedia ring tone service, the calling terminal carries the terminal capability information of the calling terminal and/or the multimedia ring tone service capability information in the call request message; before triggering the multimedia ring tone service, S -CSC-FE or CRBT AS-FE can use the terminal capability information of the calling terminal and/or the multimedia ring tone service capability information to make a pre-determination to determine whether Trigger the service, and trigger the service, and carry out the subsequent services according to the result; this will not cause the early media channel connection failure due to the calling terminal not supporting the early media negotiation, and the user hangs up because the ringback tone is not heard. In this case, the successful establishment of the normal voice channel is ensured. Similarly, when the calling terminal does not have the early media negotiation capability, the calling terminal in this embodiment does not use the signaling of the early media channel to be used as the signaling for tearing down the voice channel. , thus ensuring the successful establishment of a normal voice channel.

Example 7

The present embodiment further provides a call control entity as a multimedia ring tone control entity. As shown in FIG. 14, the call control entity includes: a receiving unit 1401, a determining unit 1402, a control unit 1403, a selecting unit 1404, and a sending unit 1405.

The receiving unit 1401 is configured to receive a call request initiated by the calling terminal, where the call request carries capability information of the calling terminal and multimedia ring tone service capability information, and is further configured to receive capability information sent by the called terminal.

The determining unit 1402 is configured to determine, according to the capability information, whether the calling terminal supports the multimedia ring tone service;

The control unit 1403 is configured to: when the calling terminal does not support the multimedia ring tone service, does not initiate a request for establishing an early media channel between the calling terminal and the media resource processing function entity.

The control unit 1403 is further configured to: when the called terminal subscribes to the multimedia ring tone service, and initiate the establishment of the calling terminal and the media resource processing function entity when the calling terminal supports the multimedia ring tone service Early media channel request.

The selecting unit 1404 is configured to: when the calling terminal supports the multimedia ring tone service, select a type of the multimedia ring tone service according to the multimedia ring tone service capability information;

The sending unit 1405 is configured to send the selected multimedia ringtone service type to the media resource processing function entity by using the application support function entity, so that the media resource processing function entity sends the multimedia content corresponding to the selected type through the early media channel. Give the calling terminal.

Further, the call control entity further includes:

The requesting unit 1406 is configured to request the called terminal to send capability information of the called terminal.

The example also provides an application support function entity as a multimedia ring tone control entity, as shown in the figure. As shown in FIG. 15, the application supporting function entity includes: a receiving unit 1501, a determining unit 1502, a control unit 1503, a selecting unit 1504, and a sending unit 1505.

The receiving unit 1501 is configured to receive terminal capability information and/or multimedia ring tone service capability information forwarded by the call control entity.

The determining unit 1502 is configured to determine, according to the capability information, whether the calling terminal supports the multimedia ring tone service.

The control unit 1503 is configured to: when the calling terminal does not support the multimedia ring tone service, does not initiate a request for establishing an early media channel between the calling terminal and the media resource processing function entity.

The control unit 1503 is further configured to: when the called terminal subscribes to the multimedia ring tone service, and when the calling terminal supports the multimedia ring tone service, initiate the establishment between the calling terminal and the media resource processing function entity. Early media channel request.

The selecting unit 1504 is configured to: when the calling terminal supports the multimedia ring tone service, select a type of the multimedia ring tone service according to the multimedia ring tone service capability information;

The sending unit 1505 is configured to send the selected multimedia ringtone service type to the media resource processing function entity, so that the media resource processing function entity sends the multimedia content corresponding to the selected type to the calling terminal through the early media channel.

Through the foregoing apparatus for the multimedia ring tone service, the calling terminal carries the terminal capability information of the calling terminal and/or the multimedia ring tone service capability information in the call request message; before the multimedia ring tone service is triggered, the call control entity or The application support function entity can use the terminal capability information of the calling terminal and/or the multimedia ring tone service capability information to perform pre-determination, determine whether to trigger the service, and trigger which service, and carry out subsequent services according to the result; The early media channel connection failure occurs because the calling terminal does not support the early media negotiation, and the user hangs up because the ringback tone is not heard, thereby ensuring the successful establishment of the normal voice channel; likewise, when the calling terminal does not have the early media When the negotiation capability is enabled, the calling terminal in this embodiment does not regard the signaling of the early media channel removal as the signaling for tearing down the voice channel, thereby ensuring the successful establishment of the normal voice channel.

Example 8

The embodiment provides a control system for a multimedia ring tone service. As shown in FIG. 16, the system includes: a calling terminal 701, a call control entity 702, an application support function entity 703, and a media resource office. The functional entity 1604, the called terminal 1605.

The calling terminal 701 initiates a call request to the call control entity 702, where the call request carries terminal capability information and/or multimedia ring tone service capability information.

The call control entity 702 receives the call request initiated by the calling terminal 701, and determines whether the calling terminal 701 supports the multimedia ring tone service according to the capability information. When the calling terminal 701 does not support the multimedia ring tone service, the call control entity 702 does not initiate the call. A request for an early media channel is established between the calling terminal 701 and the media resource processing function entity 1604. When the called terminal 1605 has subscribed to the multimedia ring tone service, the call control entity 702 selects the type of the multimedia ring tone service according to the multimedia ring tone service capability information when the calling terminal 701 supports the multimedia ring tone service. And sending the selected multimedia ringtone service type to the media resource processing function entity 1604 through the application support function entity 703, and initiating a request for establishing an early media channel between the calling terminal 701 and the media resource processing entity 1604.

The application support function entity 703 initiates a request to the media resource processing function entity 1604 to establish an early media channel between the calling terminal 701 and the media resource processing function entity 1604 in accordance with the request to establish an early media channel.

The media resource processing function entity 1604 transmits the multimedia content corresponding to the selected type to the calling terminal 701 through the early media channel.

The embodiment further provides a control system for the multimedia ring tone service, which has the same structure as that of FIG. 16. The system includes: a calling terminal 701, a call control entity 702, an application support function entity 703, and a media resource processing function entity 1604. Call terminal 1605.

The call control entity 702 sends the terminal capability information in the call request to the application support function entity 703;

The application support function entity 703 receives the terminal capability information forwarded by the call control entity 702, and determines whether the calling terminal 701 supports the multimedia ring tone service according to the capability information. When the calling terminal 701 does not support the multimedia ring tone service, Initiating a request for establishing an early media channel between the calling terminal 701 and the media resource processing function entity 1604; signing more at the called terminal 1605 In the case of the media ring tone service, the application support function entity 703 is further configured to: when the calling terminal 701 supports the multimedia ring tone service, select a type of the multimedia ring tone service according to the multimedia ring tone service capability information, and The selected multimedia ringtone service type is sent to the media resource processing function entity 1604 to initiate a request for establishing an early media channel between the calling terminal 701 and the media resource processing function entity 1604.

Through the above control system for the multimedia ring tone service, the calling terminal carries the terminal capability information of the calling terminal and/or the multimedia ring tone service capability information in the call request message; before the multimedia ring tone service is triggered, the call control entity Or the application function supporting entity may use the terminal capability information of the calling terminal and/or the multimedia ring tone service capability information to perform pre-determination, determine whether the service is triggered, and trigger the service, and perform subsequent services according to the result; As a result, the early media channel connection failure occurs because the calling terminal does not support early media negotiation, and the user hangs up because the ringback tone is not heard, thereby ensuring the successful establishment of the normal voice channel; likewise, when the calling terminal does not have an early stage When the media negotiation capability is enabled, the calling terminal in this embodiment does not use the signaling of tearing down the early media channel as the signaling for tearing down the voice channel, thereby ensuring successful establishment of the normal voice channel.

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

Claim

A method for calling a multimedia ring tone service, comprising:

The method for calling a multimedia ring tone service according to claim 1, wherein the method further comprises:

When the terminal capability information indicates that the terminal supports the multimedia ring tone service, an early media channel is established with the media resource processing function entity.

The method for calling a multimedia ring tone service according to claim 1, wherein the terminal capability information and/or the multimedia ring tone service capability information is carried in a data domain through a request message of a session initiation protocol, by using a header field and / or session description format to carry.

The method for calling a multimedia ring tone service according to claim 1, wherein the terminal capability information and/or the multimedia ring tone service capability information are carried by user-to-user signaling in the circuit bearer domain.

5. A method for controlling a multimedia ring tone service, characterized in that:

Receiving capability information of the calling terminal;

The method for controlling a multimedia ring tone service according to claim 5, wherein the method further comprises:

In the case that the called terminal subscribes to the multimedia ring tone service, when the calling terminal supports the multimedia ring tone service, a request for establishing an early media channel between the calling terminal and the media resource processing function entity is initiated.

The method for controlling a multimedia ring tone service according to claim 6, wherein the method further comprises:

Receiving multimedia ringing service capability information of the calling terminal;

When the calling terminal supports the multimedia ring tone service, according to the multimedia ring tone service capability letter Select the type of multimedia ring tone service;

Sending the selected multimedia ringtone service type to the media resource processing function entity, or sending the application to the media resource processing function entity through the application support function entity;

The media resource processing function entity sends the multimedia content corresponding to the selected type to the calling terminal through the early media channel.

The method for controlling a multimedia ring tone service according to claim 7, wherein the capability information of the calling terminal and/or the multimedia ring tone service capability information are received, and the request message of the session initiation protocol is passed in the data domain. The header field and/or session description format is received.

The method for controlling a multimedia ring tone service according to claim 7, wherein the capability information of the calling terminal and/or the multimedia ring tone service capability information are received, and the user-to-user signaling is used in the circuit bearer domain. receive.

The method for controlling a multimedia ring tone service according to claim ,, wherein the method further comprises:

Requesting the called terminal to send capability information of the called terminal;

Receive capability information sent by the called terminal.

11. A method for controlling a multimedia ring tone service, characterized in that:

Receiving capability information of the calling terminal;

The method for controlling a multimedia ring tone service according to claim 11, wherein the method further comprises:

Selecting a type of the multimedia ring tone service according to the multimedia ring tone service capability information;

The method for controlling a multimedia ring tone service according to claim 12, wherein the capability information of the calling terminal and/or the multimedia ring tone service capability information are received, and the request message of the session initiation protocol is passed in the data domain. The header field and/or session description format is received.

The method for controlling a multimedia ring tone service according to claim 12, wherein the capability information of the calling terminal and/or the multimedia ring tone service capability information are received, and the user-to-user signaling is used in the circuit bearer domain. receive.

The method for controlling a multimedia ring tone service according to claim 12, wherein the method further comprises:

Receive capability information sent by the called terminal.

16. A terminal, comprising:

The call unit (401) is configured to initiate a call request to the call control entity, where the call request carries terminal capability information and/or multimedia ring tone service capability information.

17. A multimedia ring tone service control entity, comprising:

a receiving unit (501), configured to receive capability information of the calling terminal;

a determining unit (502), configured to determine, according to the capability information, whether the calling terminal supports the multimedia ringtone service;

The control unit (503) is configured to: when the calling terminal does not support the multimedia ring tone service, does not initiate a request for establishing an early media channel between the calling terminal and the media resource processing function entity.

The multimedia ring tone service control entity according to claim 17, wherein the control unit (503) is further configured to: when the called terminal subscribes to the multimedia ring tone service, and in the main When the terminal is called to support the multimedia ring tone service, a request for establishing an early media channel between the calling terminal and the media resource processing function entity is initiated.

The multimedia ring tone service control entity according to claim 18, wherein the multimedia ring tone service control entity is a call control entity, and the receiving unit is further configured to receive the multimedia ring tone service capability information of the calling terminal. ;

The call control entity further includes:

a selecting unit (504), configured to: when the calling terminal supports the multimedia ring tone service, according to the The multimedia ring tone service capability information selects the type of the multimedia ring tone service;

a sending unit (505), configured to send the selected multimedia ringtone service type to the media resource processing function entity by using an application support function entity, so that the media resource processing function entity sends the multimedia corresponding to the selected type through the early media channel The content is sent to the calling terminal.

The multimedia ring tone service control entity according to claim 18, wherein the multimedia ring tone service control entity is an application support function entity, and the receiving unit is further configured to receive a multimedia ring of the terminal forwarded by the call control entity. Audio service capability information;

The application support functional entity also includes:

a selecting unit (504), configured to: when the calling terminal supports the multimedia ring tone service, select a type of the multimedia ring tone service according to the multimedia ring tone service capability information;

a sending unit (505), configured to send the selected multimedia ringtone service type to the media resource processing function entity, so that the media resource processing function entity sends the multimedia content corresponding to the selected type to the calling party through the early media channel terminal.

A multimedia ring tone service control entity, comprising:

a receiving unit (501), configured to receive capability information of the calling terminal and multimedia ringing service capability information;

a control unit (503), configured to initiate a request for establishing an early media channel between the calling terminal and the media resource processing function entity when the calling terminal supports the multimedia ring tone service;

The selecting unit (504) is configured to select a type of the multimedia ring tone service according to the multimedia ring tone service capability information.

The multimedia ring tone service control entity according to claim 21, wherein the multimedia ring tone service control entity is a call control entity, and the call control entity further includes:

a sending unit (1405), configured to send the selected multimedia ringtone service type to the media resource processing function entity by using an application support function entity, so that the media resource processing function entity sends the multimedia corresponding to the selected type through the early media channel The content is sent to the calling terminal.

23. The multimedia ring tone service control entity according to claim 22, wherein: The media ring tone service control entity is an application support function entity, and the application support function entity further includes: a sending unit (1505), configured to send the selected multimedia ring tone service type to the media resource processing function entity, to facilitate the media The resource processing function entity sends the multimedia content corresponding to the selected type to the calling terminal through the early media channel.

24. A control system for a multimedia ring tone service, comprising:

The control system of the multimedia ring tone service according to claim 24, wherein, in the case that the called terminal subscribes to the multimedia ring tone service, the call control entity is further configured to support the calling terminal. When the multimedia ring tone service is used, a request for establishing an early media channel between the calling terminal and the media resource processing function entity is initiated;

The control system also includes:

The application support function entity is configured to initiate a request to the media resource processing function entity according to the request for establishing an early media channel to establish an early media channel between the calling terminal and the media resource processing function entity.

The control system of the multimedia ring tone service according to claim 25, wherein the call request initiated by the calling terminal further carries the multimedia ring tone service capability information of the terminal;

The call control entity is further configured to: when the calling terminal supports the multimedia ring tone service, select a type of the multimedia ring tone service according to the multimedia ring tone service capability information, and apply the selected multimedia ring tone service type through the application. Supporting the function entity to send to the media resource processing function entity;

The control system of the multimedia ring tone service according to claim 26, wherein the call control unit is further configured to request capability information of the called terminal from the called terminal, and receive the called terminal. Ability information sent.

28. A control system for a multimedia ring tone service, comprising:

An application support function entity, configured to receive terminal capability information forwarded by the call control entity, and determine, according to the capability information, whether the calling terminal supports the multimedia ring tone service; when the calling terminal does not support the multimedia ring tone service, does not initiate A request for establishing an early media channel is established between the calling terminal and the media resource processing function entity.

The control system of the multimedia ring tone service according to claim 28, wherein, in the case that the called terminal subscribes to the multimedia ring tone service, the application support function entity is further used in the calling terminal. When the multimedia ring tone service is supported, a request for establishing an early media channel between the calling terminal and the media resource processing function entity is initiated.

The control system of the multimedia ring tone service according to claim 29, wherein the call request initiated by the calling terminal further includes multimedia ring tone service capability information of the terminal;

The application support function entity is further configured to receive the multimedia ring tone service capability information of the terminal forwarded by the call control entity; when the calling terminal supports the multimedia ring tone service, select the multimedia ring tone according to the multimedia ring tone service capability information Type of service, and send the selected multimedia ringtone service type to the media resource processing function entity;