WO2009026759A1

WO2009026759A1 - A method and a system for the service of multiple terminals with one number ringing simultaneously

Info

Publication number: WO2009026759A1
Application number: PCT/CN2007/003693
Authority: WO
Inventors: Yong Yang; Yinjun Han; Hongbo Gan
Original assignee: Zte Corporation
Priority date: 2007-08-30
Filing date: 2007-12-19
Publication date: 2009-03-05
Also published as: CN101123645B; CN101123645A

Abstract

A method for the service of multiple terminals with one number ringing simultaneously is provided. After the application server receives the call request from the calling terminal, the application server forwards the request which carries the media description information of the common session of the calling terminal and the sign supporting the early media session to the called terminals; after the called terminals receive the call request, they send the media description of the common session of themselves and the media description information of the early media session to the application server; the application server amends the media description information of the early media session from the called terminals and feeds it back to the called terminals respectively; the application server sends the ringing to the calling terminal; after the application server finds that one called terminal is off-hook, the application server informs the other called terminals to hang up and sends the media description information of the common session of the hook-off terminal to the calling terminal, then the calling terminal and the called terminal come into talk with each other. A system for the service of multiple terminals with one number ringing simultaneously is provided. The losing packet problem due to the media switch is solved.

Description

Method and system for multi-machine co-vibration service

Technical field

The present invention relates to an NGN network (next generation network), and more particularly to a method and system for a multi-machine co-vibration service.

Background technique

The No. 1 multi-machine is a very distinctive service in the NGN network. The service feature of this service is that multiple physical terminals are bundled with one number. When the calling user dials the number, the application server simultaneously calls and A plurality of terminals associated with the number or sequentially call a plurality of terminals in a certain order, that is, a so-called co-vibration service or a smoothing service. At present, the typical featured services carried out in the NGN network include the one-way and one-number two-node services, and the business logic of the two is completely the same. The difference between the two is: In the No. 1 service, there may be more than one number of terminals associated with the No. 1 number; and the No. 1 dual service is to associate the user's fixed telephone and PHS terminal to one number at the same time. , so the number of terminals is only two.

For the service of the No. 1 multi-machine type, the business logic includes the two services of the same vibration and the smoothing, and the implementation of the business logic is exactly the same. In particular, for the same-vibration service, when the user agent client (UAC: User Agent Client) sends a call request to the user agent server (UAS: User Agent Server), the UAS acting as the application server needs to call multiple times at the same time. At the terminal, a typical call model of "fork" appears. For the processing of this call model, different application server processing modes are different, and more importantly, the application server must have a media switch operation to ensure that after a terminal goes off-hook, the calling party and the terminal Normal conversation. This media switching operation usually causes the loss of the called voice slice and affects the quality of the call.

FIG. 1 is a flow chart showing the signaling processing of implementing the No. 1 dual-machine co-oscillation service in the prior art. The process is as follows: Step 101: The calling UE-a initiates a call request, where the calling SDP-a (media description information) is carried, and the AS (application server, Application Server) receives the INVITE (call request); Step 10 ² : The AS sends 100 TRYING to UE-a (representing the receipt of the INVITE and other messages. Preparation)

Step 103: The AS rewrites the SDP-a, changes the media connection address to 0.0.0.0, forms an SDP-a, and then sends an INVITE to the called UE-b and the called UE-c, where the SDP-a' is carried;

Step 104: The AS receives the 100 TRYING sent by the UE-b and the called UE-c.

Step 105: The AS receives the 180 message (ringing message) of the UE-b, returns the PRACK to the UE-b (acknowledgment of receiving the 180 message), and receives the 200 OK (response response) sent by the UE-b, and completes the reliable 180. Answer

The AS receives the message 180 of the UE-c, returns the PRACK sent by the UE-c after returning the PRACK to the UE-c, and completes the response of the reliable 180;

Step 106: The AS sends a 180 message to the calling UE-a, and after receiving the PRACK sent by the UE-a, sends an OK message to the UE-a to complete a reliable 180 response.

Step 107: It is assumed that the called UE-c first picks up the phone, and the AS receives the 200 OK message (answer message) sent by the UE-c, and carries the SDP-c at this time;

Step 108: The AS sends an ACK (acknowledgement message) to the UE-c.

Steps 109~112: The UE-b is hanged up, the AS sends a CANCEL to the UE-b, and the response of the related event is completed in sequence;

Step 113: The AS sends a RE-INVITE to the UE-c, carrying the SDP-a;

Step 114: The AS receives the 100 TRYING sent by the UE-c.

Step 1 15: The AS receives the 200 OK response sent by UE-c, which carries the SDP.

Step 116: The AS sends an ACK to the UE-c.

Step 117: The AS returns 200 OK to the calling UE-a, where the SDP-c is carried;

Step 118: The AS receives an ACK sent by the UE-a.

Thereafter _{: The} main callee enters the call state. Summary of the invention

The technical problem to be solved by the present invention is to provide a method and system for the multi-machine co-vibration service of the No. 1 multi-machine, which can easily realize the multi-machine co-vibration service of No. 1 and can solve the problem of media switching in the prior art. The resulting media packet is lost.

In order to solve the above problems, the present invention provides a method for the multi-machine co-oscillation service, including:

a. After receiving the call request sent by the calling terminal, the application server forwards the call request to each called terminal, and carries the media description information of the ordinary session of the calling terminal and the flag supporting the early media session;

After receiving the call request, each called terminal sends the media description information of the normal session of the terminal and the media description information of the early media session to the application server;

The application server modifies the media description information of the early media session sent by each called terminal, and feeds back the media description information of the modified early media session to the corresponding called terminal respectively; and sends a ringing message to the calling terminal;

The application server learns that after the called terminal picks up the phone, notifies other called terminals to hang up, and sends the media description information of the ordinary session of the called terminal to the calling terminal, the calling terminal and the off-hook Call the terminal to make a call.

Further, after receiving the call request sent by the application server, each called terminal sends a ringing message to the application server, where the media description information of the ordinary session of the called terminal and the media description of the early media session are carried. information.

Further, in the step c, the application server modifies the media description information of the early media session sent by the called terminal, that is, the application server clears the media connection address of the media description information of the early media session or deletes the media connection address.

Further, after the step c is performed, the called terminal sends a response message to the application server after receiving the media description information of the modified early media session fed back by the application server.

Further, in the step d, the application server receives a message that the called terminal picks up the phone, notifies the other called terminal to hang up, and sends a response message to the calling terminal, where the ordinary session of the called party that carries the off-hook is carried. The media description information, the calling terminal sends an acknowledgement message to the application server, and then the calling terminal and the called terminal that picks up the phone make a call.

In order to solve the above problem, the present invention further provides a system for the multi-machine co-oscillation service, including a calling terminal, an application server, and a plurality of called terminals, where the calling terminal is used to initiate a call request, the application server is configured to forward the received call request sent by the calling terminal to each called terminal,

Transmitting, by the application server, the media description information of the normal session of the calling terminal and the flag supporting the early media session when forwarding the call request to each called terminal;

The application server is further configured to: after receiving the media description information of the normal session sent by each called terminal and the media description information of the early media session, modify the media description information of the early media session, and modify the modified early media session. The media description information is separately fed back to the corresponding called terminal; the ringing message is sent to the calling terminal at the same time; and the media description information of the ordinary session of the off-hook terminal is sent to the main after the called terminal picks up the phone. Call the terminal and notify other called terminals to hang up;

Each of the called terminals is configured to: after receiving the call request sent by the application server, send the media description information of the normal session of the terminal and the media description information of the early media session to the application server.

Further, the called terminal is configured to send a ringing message to the application server after receiving the call request sent by the application server, where the media description information of the ordinary session of the called terminal and the media description information of the early media session are carried. .

Further, the application server modifying the media description information of the early media session sent by the called terminal means that the application server clears the media connection address of the media description information of the early media session or deletes the media connection address.

Further, the called terminal is further configured to: after receiving the media description information of the modified early media session fed back by the application server, send a response message to the application server.

Further, the application server is configured to notify the other called terminal to hang up after receiving the off-hook message, and send a response message to the calling terminal, where the media description of the ordinary session of the called terminal that carries the off-hook information.

In summary, the present invention encapsulates and standardizes the implementation of the multi-machine co-oscillation service, and also effectively solves the problem of media packet loss caused by media switching in the existing service.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a signaling flow chart of a multi-machine co-vibration service in the prior art; 2 is a general flow chart of the present invention for the multi-machine co-oscillation service;

FIG. 3 is a signaling flowchart of a specific implementation of the present invention for the multi-machine co-vibration service. Preferred embodiment of the invention

The present invention introduces an early media session processing mode. FIG. 2 is a general flow chart of the first multi-machine co-oscillation service according to the present invention. When the application server calls multiple called terminals, the media description information of the session of the calling terminal has been The media description information of the ordinary session is brought to each called terminal, and the operation of initiating the media update is not required after the called terminal is off-hook to bring the media description information of the calling party to the called terminal; each called terminal receives After the call is requested, the normal session media description information and the early media session media description information of the terminal are sent to the application server.

The embodiment relates to a system for the multi-machine co-oscillation service, including a calling terminal, an application server, and a plurality of called terminals; the system is applicable to each called terminal supporting the request annotation protocol RFC3959,

The calling terminal is configured to initiate a call request, where the common session media description information of the calling terminal is carried;

The application server is configured to forward the received call request sent by the calling terminal to each called terminal, where the common session media description information of the calling terminal and the supported: eariay-session (supporting early media session) flag are carried. And the media description information of the early media session is modified after receiving the ringing message sent by each called terminal, where the media description information of the modified early media session refers to the media of the media description information of the early media session. The connection address is cleared or the media connection address is deleted, and the media description information of the modified early media session is respectively fed back to the corresponding called terminal; at the same time, a ringing message is sent to the calling terminal; After the message of the machine sends a response message to the calling terminal, carrying the media description information of the ordinary session of the off-hook terminal, and notifying other called terminals to hang up;

The called terminal is configured to send a ringing message to the application server after receiving the call request sent by the application server, and carry the normal session media description information of the terminal and the early session media description information; and is also used to receive the modified feedback of the application server. The media description of the early session is sent to the response message. The embodiment also relates to a method for the multi-machine co-oscillation service, wherein each called terminal supports the RFC3959 protocol, and the first-number dual-machine is taken as an example for description. As shown in FIG. 3, the specific processing flow is shown in FIG. as follows:

Step 201: The calling UE-a initiates a call request, where the calling SDP-a (ie, the media description information of the calling party a) is received, and the AS receives the INVITE sent by the UE-a;

Step 202: The AS sends 100 TRYING to UE-a.

Step 203: The AS sends an INVITE to the called UE-b, where the SDP-a and Supported: earlay-session flags are carried, that is, the flag supporting the early media session;

The AS sends an INVITE to the called UE-c, which carries the SDP-a and Supported: earlay-session flags;

Step 204: The AS receives the 100 TRYING sent by the UE-b.

The AS receives 100 TRYING from UE-c;

Step 205: The AS receives the 180 message (ringing message) sent by the UE-b, where the normal session SDP-b (ie, the media description information of the called b) and the early media session SDP-eb (ie, the called b) are carried. Early media session media description information); AS saves SDP-b;

The AS receives the 180 message sent by the UE-c, which carries the normal session SDP-c and the early media session SDP-ec (that is, the early media session media description information of the called c); the AS saves the SDP-c;

Step 206: The AS changes the media connection address of the SDP-eb to 0.0.0.0 (that is, clears) or deletes the media connection address to form an SDP-eb, and sends a PRACK message to the UE-b, where the SDP-eb is carried; Change the media connection address of SDP-ec to 0.0.0.0 (that is, clear) or delete the media connection address to form SDP-ec, and send a PRACK message to UE-c to carry SDP-ec.

Step 207: The AS sends a 180 message to the calling UE-a, and after receiving the PRACK message sent by the UE-a, the AS sends a 200 OK to complete the reliable 180 response.

Step 208: The AS receives a 200 OK response of the UE-b to the PRACK message.

The AS receives a 200 OK response from the UE-c to the PRACK message;

Step 207 can be performed in parallel with steps 206 and 208, that is, the execution is in no particular order; Step 209: The AS receives the 200 OK response of the UE-c off-hook; Steps 210 to 213: The AS sends a CANCEL to the UE-b, and sequentially completes the response of the related event; thereby suspending the UE-b;

Step 214: The AS sends a 200 OK to the calling UE-a, where the SDP-c is carried.

Step 215: The AS receives an ACK sent by the UE-a.

Thereafter, the main called party enters the call state.

While the invention has been described in connection with the specific embodiments, the modifications and the modifications Such modifications and variations are considered to be within the scope of the invention and the scope of the appended claims.

Industrial applicability

The invention provides a method and a system for the multi-machine co-oscillation service, which simplifies and standardizes the realization of the multi-machine co-vibration service, and also effectively solves the problem of media switching in the existing service. The problem of media packet loss.

Claims

Claim

1. A method for the multi-machine co-oscillation service, comprising:

2. The method according to claim 1, wherein each of the called terminals in the step b receives a call request sent by the application server, and sends a ringing message to the application server, where the called terminal carries the called terminal. The media description information of the normal session and the media description information of the early media session.

The method according to claim 1, wherein the application server modifies the media description information of the early media session sent by the called terminal in the step c, that the application server uses the media description information of the early media session. Clear the media connection address or delete the media connection address.

The method according to claim 1, wherein after the step c is executed, the called terminal receives the media description information of the modified early media session fed back by the application server, and sends a response to the application server. Message.

The method according to claim 1, wherein in the step d, the application server receives a message that the called terminal picks up the phone, notifies the other called terminal to hang up, and sends a response message to the calling terminal, where The media description information of the called ordinary conversation of the called off-hook, the calling terminal sends an acknowledgement message to the application server, and then the calling terminal and the called terminal of the off-hook make a call.

6. A system for multi-machine co-oscillation service, comprising a calling terminal and an application server And a plurality of called terminals, the calling terminal is configured to initiate a call request, and the application server is configured to forward the received call request sent by the calling terminal to each called terminal, where:

The system according to claim 6, wherein each of the called terminals is configured to send a ringing message to the application server after receiving the call request sent by the application server, where the called terminal carries the common The media description information of the session and the media description information of the early media session.

The system according to claim 6, wherein the application server modifies the media description information of the early media session sent by the called terminal, that is, the media connection address of the media description information of the early media session by the application server. Clear or delete the media connection address.

The system according to claim 6, wherein the called terminal is further configured to: after receiving the media description information of the modified early media session fed back by the application server, send a response message to the application server.

The system according to claim 6, wherein the application server is configured to notify the other called terminal to hang up after receiving the off-hook message, and send a response message to the calling terminal, where the Media description information of the normal session of the called terminal that is off-hook.