WO2010022621A1

WO2010022621A1 - Method for disposing the early media negotiation failure, and corresponding device, communication system

Info

Publication number: WO2010022621A1
Application number: PCT/CN2009/072850
Authority: WO
Inventors: 杨健; 陈国乔; 郜文美; 张惠萍
Original assignee: 华为技术有限公司
Priority date: 2008-08-27
Filing date: 2009-07-21
Publication date: 2010-03-04
Also published as: CN101662736B; CN101662736A

Abstract

A method for disposing the Early Media negotiation failure, includes: receiving a multimedia ring back tone request from the ring back tone server; having a Early Media negotiation; transmitting an answer responding to the multimedia ring back tone request to the ring back tone server, the answer includes a mark of the Early Media negotiation failure so as to denote the Early Media negotiation failure. A method for disposing the Early Media negotiation failure, includes: transmitting a multimedia ring back tone request to the User Equipment; receiving an answer responding to the multimedia ring back tone request from the User Equipment, the answer includes a mark of the Early Media negotiation failure; initiating a negotiation of normal session. And a User Equipment, a ring back tone server and a communication system corresponding to the method for disposing the Early Media negotiation failure are provided. A normal call between a calling User Equipment and a called User Equipment can be created when the Early Media negotiation fails.

Description

Early media negotiation failure processing method and related equipment, communication system This application claims to be submitted to the Chinese Patent Office on August 27, 2008, the application number is 200810210544.5, and the invention name is "early media negotiation failure processing method and related equipment, communication system" Priority of Chinese Patent Application, the entire contents of which is incorporated herein by reference.

Technical field

The present invention relates to the field of communication technologies, and discloses an early media negotiation failure processing method, related equipment, and communication system.

Background technique

The ring back tone service is a personalized mobile phone service that has gradually emerged in recent years. It is also called RBT (Ring Back Tone). The ring back tone service refers to the ability to hear rich and colorful music when the calling party is called. Sound effect, in place of the traditional "looping" sound of the ringback tone. The Multimedia Ring Back Tone (MRRT) is an enhancement to the ordinary CRBT service. It is a service in which the calling user receives the multimedia video ring back tone before the call is made when the third generation mobile communication system (3G) mobile user makes a video call (VP: Video Phone).

The CRBT (Customized Ring Back Tone) service in the IMS domain is an existing technology for implementing multimedia ring back tones. The main processes are as follows:

The calling user equipment sends a connection request (INVITE) with a session request (offer) to the called user equipment, and the connection request passes between the called user equipment and the service call session control function entity (S-CSC-FE: Serving) Call Session Control Functional Entity and CRBT Application Server Functional Entity; where the connection request is filtered by the service call session control function entity, Then, it is routed to the personalized ring back tone application server function entity, and the personalized ring back tone application server function entity sends the INVITE request with the offer to the called user equipment. The support request (supported) header field contains the early-session option tag and the reliable temporary response flag (lOOrel) option tag.

After the called user equipment receives the INVITE request with the offer, it generates and sends a reliable temporary response to initiate early media negotiation. The reliable temporary response may be a session in progress response message (183 response message). The reliable temporary response first arrives at the personalized ring back tone application server functional entity. If the personalized ringback tone application server function entity discovers that the calling user device supports the early session and the called user The device has customized the personalized ring back tone service, and the personalized ring back tone application server function entity sends an INVITE request to the multimedia ring back tone platform. After receiving the request sent by the multimedia ring back tone platform, the response message (200 OK) is successfully processed, and the response is received. The message includes a personalized ring back tone request (CRBT offer), and the personalized ring back tone application server function entity sends a reliable temporary response including answer and CRBT offer to the calling user equipment through the service call session control function entity, wherein, the personalized back The ringtone offer carries the media protocol type of the early media.

The calling user equipment responds with a reliable temporary response with a reliable temporary response, which may be a temporary response confirmation (PRACK) message carrying a personalized ringback tone response (CRBT answer); a reliable temporary response to the personalized ringback The voice application server function entity, the personalized ring back tone application server function entity initiates a subsequent CRBT playback process and a normal session negotiation process, and the stopped CRBT playback process after the called user equipment picks up the phone; after the CRBT stops playing, the calling user The device and the called user device can perform a videophone call of the Real-time Transport Protocol (RTP).

In the research and practice of the prior art, the inventors have found that the above prior art has at least the following drawbacks: in the early media negotiation process, if the calling user equipment does not support the relevant multimedia protocol type, or the calling user equipment When the early media negotiation fails due to insufficient media resources or network failure, the application server function entity does not receive the temporary response confirmation sent by the calling user equipment, so that the normal session negotiation will not be initiated, resulting in the calling user equipment and the A normal call between the calling user devices cannot be established.

When the early media negotiation fails, a normal call between the calling user equipment and the called user equipment can be established.

An early media negotiation failure processing method includes: receiving a multimedia CRBT request from a CRBT server; performing early media negotiation; and sending a response to the CRBT request in response to the multimedia CRBT request, where the response includes an early media negotiation failure flag, To indicate that early media negotiations failed.

An early media negotiation failure processing method includes: transmitting a multimedia CRBT request to a user equipment; receiving a response from the user equipment in response to the multimedia CRBT request, the response including an early media negotiation failure flag; initiating a normal session Negotiation. An early media negotiation failure processing method includes: sending a multimedia CRBT request to a user equipment; determining that an early media negotiation fails if a response to the multimedia CRBT request is not received within a preset time; initiating a negotiation of a normal session.

A user equipment, comprising: a receiving unit, configured to receive a multimedia color ring back tone request; a negotiating unit, configured to perform early media negotiation after the receiving unit receives the multimedia color ring back tone request, and send a response unit A response to a reliable temporary response, the response including a flag of early media negotiation failure to indicate an early media negotiation failure.

A color ring back tone server, comprising: a sending unit, configured to send a multimedia color ring back tone request; a receiving unit, configured to receive a response that is responsive to the multimedia color ring back tone request, the response includes an early media negotiation failure flag, and an initiating unit, configured to When the receiving unit receives the response, it initiates negotiation of the normal session.

A color ring back tone server, comprising: a sending unit, configured to send a multimedia color ring back tone request; and a determining unit, configured to determine that an early media negotiation failure occurs when the message that responds to the multimedia color ring back tone request sent by the sending unit is not received within a preset time; And an initiating unit, configured to initiate a negotiation of a normal session when the determining unit determines that the early media negotiation fails.

A communication system, comprising: a color ring back tone server, configured to send a multimedia color ring back tone request; receive a response responsive to the multimedia color ring back tone request, the response includes an early media negotiation failure flag to indicate that an early media negotiation failure occurs; initiate a normal session negotiation a service call session control function entity, configured to receive and forward the multimedia color ring back tone request; receive and forward the response; a user equipment, configured to receive a multimedia color ring back tone request; perform early media negotiation; construct and send the response.

It can be seen from the foregoing technical solutions provided by the embodiments of the present invention that, in the embodiment of the present invention, when the early media negotiation fails, the early media negotiation failure may be learned by the early media negotiation failure flag, and then the network side may initiate the subsequent normal session. Negotiation, thereby restoring the call flow to the normal call state, enabling normal calls between the calling user equipment and the called user equipment to be established, and enhancing the robustness and usability of the multimedia ring back tone system.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description For some embodiments of the present invention, other drawings may be obtained from those skilled in the art without departing from the drawings. Figure; '',' , '' , , , , , ' ,

Figure; ' ', ' , ' ' , , , , , ' ,

6 is a structural diagram of an embodiment of a user equipment according to an embodiment of the present invention;

FIG. 7 is a structural diagram of Embodiment 1 of an application server function entity according to an embodiment of the present invention; FIG. 8 is a structural diagram of Embodiment 2 of an application server function entity according to an embodiment of the present invention; FIG. 9 is a schematic diagram of a communication system according to an embodiment of the present invention; Structure diagram.

detailed description

BRIEF DESCRIPTION OF THE DRAWINGS The technical solutions in the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative work are within the scope of the present invention. Process, which describes the processing process of the user equipment in the early media negotiation process, specifically the processing process of the calling user equipment, including:

101. Receive a reliable temporary response from the CRBT server.

After the calling user equipment sends a connection request message to initiate a call flow, it receives a reliable temporary response from the CRBT server; the reliable temporary response is specifically after the CRBT server receives the reliable temporary response sent by the called user equipment, and then passes the service call session. The control function entity sends the message to the calling user equipment. In general, the reliable temporary response includes a media protocol, where the media protocol is a media protocol required by the multimedia ring back tone platform, and the multimedia ring back tone platform can be a personalized ring back tone media resource control function. CRBT MRC: CRBT Media Resource Control Functional Entity, CRBT P-FE: Media Resource Processing Functional Entity, Personalized Ringing Tone Media Resource Control Function Entity (CRT MRC: Customized Ringing Tone Media Resource Control Functional Entity ) Ringtone media resource processing functional entity (CRT P-FE: CRT Media Resource Processing Functional Entity), etc.;

The CRBT server may be different according to the network and the personalized ring tone. For example, it may be a personalized ring back tone application server functional entity (CRBT AS-FE: CRBT Application Server Functional Entity), and a personalized ring tone application server function entity. (CRT AS-FE: Customized Ringing Tone Application Server Functional Entity), etc.

102. Conduct early media consultations;

After receiving the reliable temporary response, the calling user equipment performs early media negotiation, and the early media negotiation includes allocating media resources, determining a media protocol, and the like;

103. Send a response message to the CRBT server in response to the reliable temporary response. If the early media negotiation fails, the response message includes an indication that the early media negotiation failed.

If the calling user equipment does not support the media protocol required by the multimedia ring back tone platform, the early media negotiation may fail. For example, the multimedia ring back tone platform requires the H.264 protocol and the calling user equipment does not support the H.264 protocol, which may lead to early media negotiation. Failure

Or, although the calling user equipment supports the media protocol required by the multimedia ring back tone platform, the early media negotiation may fail because the insufficient media buffer of the calling user equipment or other reasons may not allocate sufficient resources for the multimedia ring tone;

When the local user policy is configured on the calling user device, the early media negotiation may be determined according to the local policy during the early media negotiation. For example, the calling user may choose not to play the multimedia ring back tone in order to save the resources of the user equipment. , thereby rejecting early media negotiations, leading to the failure of early media negotiations.

If the early media negotiation fails, in order to enable the subsequent process to continue, a response message including the flag of the early media negotiation failure is constructed; specifically, the response message may be any user equipment that can carry the flag of the early media negotiation failure. Messages to the network side, such as Session Initiation Protocol (SIP) signaling messages;

When the response message is a session initiation protocol signaling message, the session description protocol (SDP: Session Description Protocol) field in the session initiation protocol signaling message may carry an early media negotiation failure flag or a session initiation protocol signaling message. The extended header field carries the flag of early media negotiation failure, and specifically can carry the early media association on the preset flag of the session description protocol field. The service failure flag; because the session description protocol field carries the media protocol supported by the calling user equipment, the session description protocol field may also be left blank, so that the session description protocol field does not carry any media protocol information, so that the session description protocol The field as a whole is used as a sign of early media negotiation failure; or the session initialization protocol signaling message may carry an extensible markup language (XML) document, and the XML document carries an early media negotiation failure flag. The session initiation protocol signaling message may specifically be a temporary response confirmation message or the like.

After the response message is sent to the CRBT server, the CRBT server can be notified of the failure of the early media negotiation on the calling user equipment side. The CRBT server can learn that the early media negotiation on the calling user equipment side fails, so that the CRBT server can initiate a normal session. Negotiation, further, the ring back tone server can also send a message to end the session with the multimedia ring back tone platform.

As can be seen from the above, in the embodiment, when the early media negotiation fails, the response message including the flag of the early media negotiation failure may be configured, so that the network side can learn that the early media negotiation fails, and then the subsequent normal session negotiation can be initiated, thereby calling the call. The process is restored to the normal call state, so that a normal call between the calling user equipment and the called user equipment can be established, which can enhance the robustness and usability of the multimedia ring back tone system. The response message may also include the reason for the failure of the early media negotiation, so that the network side can learn the reason for the failure of the early media negotiation, and can record the reason for the failure of the early media negotiation, and then can call the call flow or the call timing according to the reason of the early media negotiation failure. Adjustments are made to further enhance the robustness and usability of the multimedia ring back tone system. Process, which describes the processing of the ring back tone server during the early media negotiation process, including:

201. Send a reliable temporary response to the user equipment. Specifically, the reliable call may be sent to the user equipment by the serving call session control function entity.

In the call flow, after the CRBT server receives a reliable temporary response from the called user equipment, if the calling user equipment is found to support early media negotiation, and the called user equipment customizes the personalized ring tone service, it will cooperate with the multimedia ring back tone platform. The communication, the response of the multimedia ring back tone platform, the response of the multimedia ring back tone platform includes a media protocol required by the multimedia ring back tone platform; wherein, the personalized ring tone service may be a personalized ring back tone service, a personalized ring tone service, or the like; The CRBT server encapsulates the media protocol information required by the multimedia ring back tone platform into a reliable temporary response, and sends a reliable temporary response to the calling user equipment, so that the calling user equipment can obtain the corresponding information;

202. Receive a response message from the user equipment in response to a reliable temporary response, where the response message includes an indication that the early media negotiation failed;

After transmitting the reliable temporary response, the CRBT server may receive a response message in response to the reliable temporary response; the response message is sent by the user equipment through the serving call session control function entity.

203. Initiate negotiation of a normal session.

When it is determined that the early media negotiation fails, although the personalized ring tone cannot be played by the calling user equipment, the negotiation of the normal session can be continued, so that the negotiation of the normal session can be initiated, thereby ensuring the protection between the calling user equipment and the called user equipment. The normal call can be sent to the called user equipment to initiate a negotiation of the normal session. At the same time, the message can be sent to end the session with the multimedia ring back tone platform.

As can be seen from the above, after receiving the response message including the flag of the early media negotiation failure, the embodiment may determine that the early media negotiation fails, and then initiate the negotiation of the normal session, thereby restoring the call flow to the normal call state, so that the calling party A normal call between the user equipment and the called user equipment can be established, which can enhance the robustness and usability of the multimedia ring back tone system.

When the response message is a session initiation protocol signaling message, the second embodiment of the early media negotiation failure processing method provided by the embodiment of the present invention may further include: parsing the response message to obtain an early media negotiation failure flag before initiating the negotiation of the normal session.

According to the early media negotiation failure flag, the location carried in the response message is different or according to the type of the response message, the process of parsing the flag for obtaining the early media negotiation failure may be different; for example, the response message is carried by the extensible markup language document early. When the media negotiation fails, the step of parsing the response message to obtain the early media negotiation failure flag may include: parsing the response message to obtain the extensible markup language document; and parsing the early media negotiation failure flag from the extensible markup language document.

When the response message carries the flag of the early media negotiation failure through the session description protocol field, the flag for parsing the response message to obtain the early media negotiation failure may be: parsing the session description protocol field of the response message to obtain the early media negotiation failure flag; A flag for early media negotiation failure is obtained when the response message carries an early media negotiation failure flag through the extended header field or an extended header field of the resolution response message.

Specifically, the location of the flag carrying the failure of the early media negotiation failure is different, and the session description protocol field of the response message is obtained by taking the flag of the early media negotiation failure as an example: carrying the early media in the preset flag in the session description protocol field. When the failure flag is negotiated, the early media negotiation failure flag may be obtained by parsing the preset flag bit; if the session description protocol field is left blank to carry the early media negotiation failure flag, if the parsing session description protocol field is not obtained correspondingly The information is marked by the failure of early media negotiation, where the corresponding information may be the media protocol supported by the calling user equipment. The response message may also include the cause of the early media negotiation failure. In this case, the second embodiment of the early media negotiation failure processing method provided by the embodiment of the present invention may further include: parsing the response message to obtain the cause of the early media negotiation failure, and recording the early media negotiation failure. The reason for this is that the call flow or call timing can be adjusted according to the reason of the early media negotiation failure, thereby further enhancing the robustness and usability of the multimedia ring back tone system. Signaling process, including:

301. The calling user equipment sends a connection request with a session request (send) to the serving call session control function entity; wherein the support header field of the connection request may include an early session option tag and a reliable temporary response flag option tag.

302. After receiving the connection request with the session request, the serving call session control function entity performs policy filtering, and sends a connection request with the session request to the CRBT server.

303. The CRBT server sends a connection request with a session request to the called user equipment.

The CRBT server is different according to the type of the personalized ring tone. When the personalized ring tone is a personalized ring back tone, the CRBT server is a personalized ring back tone ring tone server; the personalized ring tone is personalized. When the ringing tone is sounded, the CRBT server is a personalized ringing tone ring tone server.

304. The called user equipment generates a reliable temporary response to the calling user equipment, and sends a reliable temporary response to the CRBT server, where the reliable temporary response may be an 183 response message with a session answer. 305. After receiving the reliable temporary response, the CRBT server finds that the calling user equipment supports the early session, and the called user equipment has customized the personalized ring back tone service, and the CRBT server sends a connection request to the multimedia ring back tone platform.

The multimedia ring back tone platform may be different according to different networks and/or different types of personalized ring tones. The multimedia ring back tone platform may be a personalized ring back tone media resource control function entity, a personalized ring back tone media resource processing function entity, and a personality. The ringing tone media resource control function entity, the personalized ringing tone media resource processing function entity, and the like;

306. The multimedia ring back tone platform sends a response message (200 OK) with a multimedia CRBT request to the CRBT server, and is configured to respond to the received connection request. The multimedia CRBT request may be a personalized ring back tone request (CRBT offer), A ring tone request (CRT offer), etc., the multimedia ring back tone request carries a media delivery protocol required by the multimedia ring back tone platform;

307. The CRBT server sends a reliable temporary response to the serving call session control function entity, where the reliable temporary response includes a session response and a multimedia ring back tone request.

308. The serving call session control function entity forwards a reliable temporary response including the session response and the multimedia ring back tone request to the calling user equipment.

309. After receiving the reliable temporary response including the session response and the multimedia ring back tone request, the calling user equipment performs the early media negotiation under the trigger of the multimedia CRBT request. This embodiment assumes that the early media negotiation fails.

310. The calling user equipment sends a response message with a flag of early media negotiation failure to the serving call session control function entity.

The response message may be a temporary response confirmation message with an extensible markup language document, wherein the extensible markup language document contains a flag for early media negotiation failure;

The reply message may further include the reason for the early media negotiation failure.

311. The serving call session control function entity forwards a response message with a flag of the early media negotiation failure to the ring back tone server.

312. After receiving the response message with the flag of the early media negotiation failure, the CRBT server may parse the flag of the early media negotiation failure, and learn that the early media negotiation fails, so that the processing process of the early media failure may be triggered according to the policy, and The normal call connection is ready for resources. The CRBT server sends a temporary response confirmation message to the called user equipment to initiate negotiation of the normal session. 313. The CRBT server sends an acknowledgement message (ACK) to the multimedia CRBT platform for confirming the 200 OK in 306.

314. The CRBT server sends a goodbye (BYE) message to the multimedia ring back tone platform to end the session with the multimedia ring back tone platform.

315. The multimedia ring back tone platform sends back 200 OK to respond to the goodbye message in 314.

316. The called user equipment sends a temporary response confirmation message in the 200 OK response 312 to the CRBT server.

317. The CRBT server sends a temporary response confirmation message in the 200 OK response 311 to the serving call session control function entity.

318. The serving call session control function entity forwards a temporary response confirmation message of the 200 OK response 310 to the calling user equipment.

319. The called user equipment sends a ringing message (180 ringing) to the ring back tone server, indicating that the called user equipment is ringing.

320. The CRBT server sends a ringing message to the calling user equipment. The calling user equipment can learn that the called user equipment is ringing.

321. The called user equipment sends a 200 OK to the CRBT server, indicating that the called user equipment picks up the phone.

322. The CRBT server sends a 200 OK to the calling user equipment. The calling user equipment can learn that the called user equipment picks up the phone.

323. The calling user equipment sends an acknowledgement message to the CRBT server, for confirming 200 in 322.

OK.

324. The CRBT server sends an acknowledgement message to the called user equipment, which is used to confirm 200 中 in 321 . From then on, the calling user equipment and the called user equipment can make normal videophone calls.

As shown in the above, in the embodiment, the calling user equipment can construct a response message including the flag of the early media negotiation failure when the early media negotiation fails, so that the CRBT server can learn that the early media negotiation fails, and then can initiate the subsequent normal session. Negotiation, thereby restoring the call flow to the normal call state, enabling normal calls between the calling user equipment and the called user equipment to be established, and enhancing the robustness and usability of the multimedia ring back tone system. Process, which describes the processing of the ring back tone server during the early media negotiation process, including:

401. Send a reliable temporary response to the user equipment.

In the call flow, after the CRBT server receives a reliable temporary response from the called user equipment, if the calling user equipment is found to support early media negotiation, and the called user equipment customizes the personalized ring tone (personalized ring back tone, personality) The ringing tone service is communicated with the multimedia ring back tone platform to obtain the response of the multimedia ring back tone platform, and the response of the multimedia ring back tone platform includes the media protocol required by the multimedia ring back tone platform;

The CRBT server encapsulates the media protocol information required by the multimedia ring back tone platform into a reliable temporary response, and sends a reliable temporary response to the user equipment, so that the calling user equipment can obtain the corresponding information;

402. If the message responding to the reliable temporary response is not received within the preset time, determining that the early media negotiation fails;

When the calling user equipment fails for some reason, the calling user equipment does not send a message responding to the reliable temporary response. At this time, the CRBT server does not receive the reliable response of the response sent by the calling user equipment. Message; or the calling user equipment sends a response to the reliable temporary response message, but due to the network reason, the acknowledgment message of the reliable response to the temporary response cannot be sent to the CRBT server, and the CRBT server will not receive the calling user. A message sent by the device in response to a reliable temporary response;

Therefore, the CRBT server can set a timer that is started when a reliable temporary response is sent. If the timer does not receive a response to the reliable temporary response when the timer reaches the preset time, the early media negotiation may be considered to be failed. The preset time can be predetermined based on network conditions or processing flow.

403. Initiate negotiation of a normal session.

When it is determined that the early media negotiation fails, although the personalized ring tone cannot be played by the calling user equipment, the negotiation of the normal session can be continued, so that the negotiation of the normal session can be initiated, thereby ensuring the protection between the calling user equipment and the called user equipment. The normal call; at the same time, it is also possible to send a message to end the session with the multimedia ring back tone platform.

As can be seen from the above, when the UE does not receive the message responding to the reliable temporary response within the preset time, it can determine that the early media negotiation fails, and thus can initiate the negotiation of the normal session, thereby calling the call. The process is restored to the normal call state, so that a normal call between the calling user equipment and the called user equipment can be established, which can enhance the robustness and usability of the multimedia ring back tone system. Signaling process, including:

501. The calling user equipment sends a connection request with a session request to the serving call session control function entity, where the support header field of the connection request may include an early session option label and a reliable temporary response flag option label.

502. After receiving the connection request with the session request, the serving call session control function entity performs policy filtering, and sends a connection request with the session request to the CRBT server.

503. The CRBT server sends a connection request with a session request to the called user equipment.

504. The called user equipment generates a reliable temporary response to the calling user equipment, and sends a reliable temporary response to the CRBT server, where the reliable temporary response may be a 183 response message with a session answer.

505. After receiving the reliable temporary response, the CRBT server finds that the calling user equipment supports the early session, and the called user equipment has customized the personalized ring back tone service, and the ring back tone server sends the connection request to the multimedia ring back tone platform.

506. The multimedia ring back tone platform sends a response message (200 OK) with a multimedia CRBT request to the CRBT server, and is configured to respond to the received connection request. The multimedia CRBT request may be a personalized ring back tone request (CRBT offer), A ring tone (CRT offer), etc., the multimedia ring back tone request carries a media delivery protocol required by the multimedia ring back tone platform;

507. The CRBT server sends a reliable temporary response to the serving call session control function entity, where the reliable temporary response includes a session response and a multimedia ring back tone request. 508. The serving call session control function entity forwards a reliable temporary response including the session response and the multimedia ring back tone request to the calling user equipment.

509. After receiving the reliable temporary response including the session response and the multimedia ring back tone request, the calling user equipment performs early media negotiation under the trigger of the multimedia ring back tone request.

510. After sending the reliable temporary response including the session response and the multimedia ring back tone request to the serving call session control function entity, the CRBT server waits for a response message of a reliable temporary response in response 507 until the timer expires, and then the calling user is considered as the calling user. The device negotiates the early media failure, triggers the processing of the early media failure according to the policy, and prepares the resources for the normal call connection. Specifically, the CRBT server sends a temporary response confirmation message to the called user equipment to initiate negotiation of the normal session.

The calling user equipment may not send any message due to the failure of the early media negotiation, so that the CRBT server does not receive the message of responding to the reliable temporary response in 507; or, although the calling user equipment fails regardless of the early media negotiation. A confirmation message was sent, but the CRBT server did not receive a message in response to a reliable temporary response in 507 due to network reasons.

511. The CRBT server sends an acknowledgement message to the multimedia CRBT platform for confirming the 200 OK in 506.

512. The CRBT server sends a goodbye message to the multimedia ring back tone platform to end the session with the multimedia ring back tone platform.

513. The multimedia ring back tone platform sends back 200 ΟΚ messages in response to the goodbye message in 512.

514. The called user equipment sends a 200 ΟΚ response 510 a temporary response confirmation message to the CRBT server.

515. The called user equipment sends a ringing message to the ring back tone server, indicating that the called user equipment is ringing.

516. The CRBT server sends a ringing message to the calling user equipment. The calling user equipment can learn that the called user equipment is ringing.

517. The called user equipment sends 200 向 to the CRBT server, indicating that the called user equipment is off-hook.

518. The CRBT server sends 200 ΟΚ to the calling user equipment. The calling user equipment can learn that the called user equipment picks up the phone.

519. The calling user equipment sends an acknowledgement message to the CRBT server, for confirming 200 in 518. Οκ.

520. The CRBT server sends an acknowledgement message to the called user equipment, for confirming 200 中 in 517. From then on, the calling user equipment and the called user equipment can make normal videophone calls.

It can be seen that, in the embodiment, the CRBT server can determine the early media negotiation failure according to the policy, and then initiate the subsequent normal session negotiation, thereby restoring the call flow to the normal call state. The normal call between the calling user equipment and the called user equipment can be established, and the robustness and usability of the multimedia ring back tone system can be enhanced.

The device provided by the embodiment of the present invention is introduced as follows. First, the user equipment provided by the embodiment of the present invention is introduced. FIG. 6 is a schematic diagram of the structure of the user equipment according to the embodiment of the present invention, including:

a receiving unit 601, configured to receive a reliable temporary response;

The negotiating unit 602 is configured to perform early media negotiation after the receiving unit 601 receives the reliable temporary response.

The sending unit 603 is configured to send a response message that responds to the reliable temporary response. If the negotiation unit 602 fails to perform early media negotiation, the response message includes a flag of early media negotiation failure.

As can be seen from the above, in the embodiment of the user equipment, when the early media negotiation fails, the response message including the flag of the early media negotiation failure may be configured, so that the network side can learn that the early media negotiation fails, and then the subsequent normal session negotiation can be initiated. Thereby, the call flow is restored to the normal call state, so that a normal call between the calling user equipment and the called user equipment can be established, which can enhance the robustness and usability of the multimedia ring back tone system.

Further, the embodiment of the user equipment provided by the embodiment of the present invention may further include: an obtaining unit, configured to obtain a reason why the negotiation unit 602 fails to perform early media negotiation; at this time, the response message sent by the sending unit 603 further includes that the early media negotiation fails. the reason. The network side can be informed of the reasons for the failure of the early media negotiation. The reason for the failure of the early media negotiation can be recorded, and the call flow or the call timing can be adjusted according to the reason of the early media negotiation failure, thereby further enhancing the robustness of the multimedia ring back tone system. Availability.

FIG. 7 is a diagram showing a structure of a first embodiment of a color ring back tone server according to an embodiment of the present invention, including: a sending unit 701, configured to send a reliable temporary response;

The receiving unit 702 is configured to receive a response message that responds to the reliable temporary response, where the response message includes an identifier of early media negotiation failure; The initiating unit 703 is configured to initiate negotiation of a normal session when the determining unit 702 receives the response message.

As can be seen from the above, after receiving the response message including the flag of the early media negotiation failure, the embodiment of the CRBT server can determine that the early media negotiation fails, and then initiate the negotiation of the normal session, thereby restoring the call flow to the normal call state. The normal call between the calling user equipment and the called user equipment can be established, which can enhance the robustness and usability of the multimedia ring back tone system.

Further, if the response message received by the receiving unit 702 further includes the reason for the failure of the early media negotiation, the embodiment 1 of the color ring tone server provided by the embodiment of the present invention may further include: a recording unit, configured to record the response message received by the receiving unit 702. The reasons for the failure of early media negotiations included. Therefore, the call flow or call timing can be adjusted according to the reasons for the failure of early media negotiation, thereby further enhancing the robustness and usability of the multimedia ring back tone system.

FIG. 8 is a diagram of a structure of a second embodiment of a color ring back tone server according to an embodiment of the present invention, including: a sending unit 801, configured to send a reliable temporary response;

The determining unit 802 is configured to determine that the early media negotiation fails when the response to the reliable temporary response sent by the sending unit 801 is not received within the preset time;

Specifically, the determining unit 802 may include: a timer 8021, configured to perform timing when the sending unit 801 sends a reliable temporary response; and a failure determining unit 8022, when the timing of the timer 8021 reaches a preset time, if not received In response to a reliable temporary response message, it is determined that the early media negotiation failed.

The initiating unit 803 is configured to initiate negotiation of the normal session when the determining unit 802 determines that the early media negotiation fails. Specifically, the negotiation of the normal session may be initiated when the failure determining unit 8022 determines that the early media negotiation failed.

As can be seen from the above, when the present embodiment does not receive the message responding to the reliable temporary response within the preset time, it can determine that the early media negotiation fails, and then initiate the negotiation of the normal session, thereby restoring the call flow to the normal call state. The normal call between the calling user equipment and the called user equipment can be established, and the robustness and usability of the multimedia ring back tone system can be enhanced.

FIG. 9 is a schematic diagram of a structure of a communication system according to an embodiment of the present invention, including: a color ring tone server 901, configured to send a reliable temporary response; receive a response message responding to a reliable temporary response, and the response message includes an early media negotiation failure flag; Negotiation of normal sessions; a service call session control function entity 902, configured to receive and forward a reliable temporary response; receive and forward a response message;

The user equipment 903 is configured to receive a reliable temporary response; perform early media negotiation; and when an early media negotiation fails, construct and send a response message.

As shown in the above, in the embodiment, the user equipment may construct a response message including an early media negotiation failure flag when the early media negotiation fails, so that the CRBT server can learn that the early media negotiation fails, and then initiate subsequent normal session negotiation. Thereby, the call flow is restored to the normal call state, so that a normal call between the calling user equipment and the called user equipment can be established, and the robustness and usability of the multimedia ring back tone system can be enhanced.

It will be understood by those skilled in the art that all or part of the steps of implementing the above embodiments may be performed by a program to instruct related hardware, and the program may be stored in a computer readable storage medium. And performing some or all of the steps of the foregoing method embodiments provided by the embodiments of the present invention.

The above-mentioned storage medium may be a read only memory, a magnetic disk or an optical disk or the like. The letter system is described in detail, and the description of the above embodiment is only for helping to understand the method and the idea of the present invention; at the same time, for those skilled in the art, according to the idea of the present invention, in the specific embodiment and the application range There are variations, and the description is not to be construed as limiting the invention.

Claims

Rights request

1. An early media negotiation failure processing method, characterized in that:

Receiving a multimedia ring back tone request from the ring back tone server;

Conduct early media consultations;

A response to the multimedia ring back tone request is sent to the CRBT server, the response including an early media negotiation failure flag to indicate early media negotiation failure.

2. The early media negotiation failure processing method according to claim 1, wherein the received multimedia ring back tone request comprises a media protocol;

In the process of negotiating the early media, if the media protocol is not supported, an early media negotiation failure flag is added to the response.

The early media negotiation failure processing method according to claim 1, wherein in the early media negotiation process, if the media resource is insufficient, an early media negotiation failure flag is added to the response.

The early media negotiation failure processing method according to claim 1, wherein in the performing the early media negotiation process, the flag for adding the early media negotiation failure in the response is determined according to the local policy.

The early media negotiation failure processing method according to any one of claims 1 to 4, wherein the response is carried by a session initiation protocol signaling message.

The early media negotiation failure processing method according to claim 5, wherein the session initiation protocol signaling message is a response message of a temporary response confirmation message or a temporary response confirmation message.

The early media negotiation failure processing method according to claim 5, wherein the session initiation protocol signaling message carries the early media negotiation failure flag through a session description protocol field;

Or the session initiation protocol signaling message carries the flag of the early media negotiation failure through the extended header field;

Or the session initiation protocol signaling message carries the flag of the early media negotiation failure through the extensible markup language document.

8. The early media negotiation failure processing method according to claim 7, wherein: The session description protocol field carries the flag of early media negotiation failure as follows:

Carrying the flag of the early media negotiation failure on the preset flag bit of the session description protocol field, or leaving the session description protocol field blank as a flag for the early media negotiation failure.

The early media negotiation failure processing method according to any one of claims 1 to 4, wherein the response message further comprises a cause of early media negotiation failure.

10. An early media negotiation failure processing method, characterized in that:

Sending a multimedia ring back tone request to the user equipment;

Receiving a response from the user equipment in response to the multimedia ring back tone request, the response including an early media negotiation failure flag;

Initiate negotiation of a normal session.

The early media negotiation failure processing method according to claim 10, wherein the response is carried by a session initiation protocol signaling message;

The negotiation before initiating the normal session further includes:

Parsing the response obtains a flag that the early media negotiation failed.

The early media negotiation failure processing method according to claim 11, wherein the session description protocol field of the session initiation protocol signaling message is parsed to obtain the early media negotiation failure flag;

Or parsing an extended header field of the session initiation protocol signaling message to obtain a flag of the early media negotiation failure;

Or an extensible markup language document that parses the session initiation protocol signaling message to obtain the flag of the early media negotiation failure.

The early media negotiation failure processing method according to any one of claims 10 to 12, wherein the response further includes a cause of failure of early media negotiation;

The method further includes:

Parsing the response to obtain the reason for the failure of the early media negotiation;

Record the reason for the failure of the early media negotiation.

14. An early media negotiation failure processing method, characterized in that:

Sending a multimedia ring back tone request to the user equipment; If the response to the multimedia ring back tone request is not received within the preset time, it is determined that the early media negotiation fails;

Initiate negotiation of a normal session.

The early media negotiation failure processing method according to claim 14, wherein the preset time is determined by a timer, and the timer is started when the multimedia ring back tone request is sent to the user equipment.

16. A user equipment, comprising:

a receiving unit, configured to receive a multimedia ring back tone request;

a negotiating unit, configured to perform early media negotiation after the receiving unit receives the multimedia ring back tone request;

And a sending unit, configured to send a response in response to the reliable temporary response, where the response includes an early media negotiation failure flag to indicate that the early media negotiation failed.

The user equipment according to claim 16, further comprising: the response sent by the sending unit further comprises a reason for the early media negotiation failure obtained by the acquiring unit.

18. A CRBT server, characterized in that:

a sending unit, configured to send a multimedia ring back tone request;

a receiving unit, configured to receive a response in response to the multimedia CRBT request, where the response includes an early media negotiation failure flag;

And an initiating unit, configured to initiate negotiation of a normal session when the receiving unit receives the response.

The CRBT server according to claim 18, wherein the response received by the receiving unit further includes a cause of failure of early media negotiation;

The CRBT server further includes:

And a recording unit, configured to record a cause of failure of early media negotiation included in the response received by the receiving unit.

20. A CRBT server, comprising:

a sending unit, configured to send a multimedia ring back tone request;

a determining unit, configured to not receive the multimedia sent in response to the sending unit within a preset time When the message requested by the CRBT is determined, it is determined that the early media negotiation fails;

And an initiating unit, configured to initiate negotiation of a normal session when the determining unit determines that the early media negotiation fails.

The color ring tone server according to claim 20, wherein the determining unit comprises: a timer, configured to perform timing when the sending unit sends a reliable temporary response;

The failure determining unit is configured to determine that the early media negotiation fails if the timing of the timer reaches the preset time, if the message responding to the reliable temporary response is not received.

22. A communication system, comprising:

a CRBT server, configured to send a multimedia CRBT request, and receive a response to the multimedia CRBT request, where the response includes an early media negotiation failure flag to indicate that the early media negotiation fails; and initiate a normal session negotiation;

a service call session control function entity, configured to receive and forward the multimedia ring back tone request; receive and forward the response;

a user equipment, configured to receive a multimedia ring back tone request; perform early media negotiation; construct and send the response.