WO2012113194A1

WO2012113194A1 - Method and system for randomly switching conversation between both sides in call service

Info

Publication number: WO2012113194A1
Application number: PCT/CN2011/076370
Authority: WO
Inventors: 屈天喜
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-02-22
Filing date: 2011-06-27
Publication date: 2012-08-30
Also published as: CN102104695A; CN102104695B

Abstract

The present invention discloses a method and system for randomly switching a conversation between both sides in a call service, wherein the method includes the following steps: in the conversation process between a first user terminal and a second user terminal through an Application Server (AS), when the AS knows that the first user terminal keeps the present conversation and the AS receives a request message carrying a random switch service code from the first user terminal, the AS enables the first user terminal and a third user terminal related to the request message to perform media negotiation with each other and enables the second user terminal and the third user terminal to perform media negotiation with each other, so as to establish a conversation between the second user terminal and the third user terminal; and then, the conversation between the first and second user terminals is cut off. The present invention has no relation to terminals, and the terminals do not need to support the ability of sending a REFER message, and thus various types of terminals in the present network can be operated. Conversations can be switched to a bound user, or to an appointed user.

Description

Method and system for realizing free call switching between two parties in call service

Technical field

The present invention relates to the field of communications, and in particular, to a method and system for implementing random call switching between two parties in a call service.

Background technique

The traditional post-call handover service is implemented by call forwarding, including blind transfer and inquiry transfer. Such handover requires the terminal to support sending a refer message.

As shown in FIG. 1 , in the prior art, a refer message is used to implement a random handover between two parties, where users A and B (through user terminals UE-A and UE-B) are in a call, and B is used to maintain the call. The way to keep a call with A, then, use the refer message to switch the call from AB to AC.

However, the ability to send a refer message is generally a relatively high-end terminal, and a normal terminal usually does not have such capability. How to make the ordinary terminal have the function of switching after the call during the call, is an urgent problem to be solved.

Summary of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art described above, and to provide a method and system for implementing random call switching between two parties in a call service, to solve the problem of how to make a normal terminal have a function of switching after a call during a call. problem.

In order to solve the above problem, the present invention provides a method for implementing random call switching between two parties in a call service, including:

During the process of the first user terminal and the second user terminal talking through the application server (AS), when the AS learns that the first user terminal maintains an existing call, and the AS receives the first user terminal and carries the random When the request message of the service code is cut, the AS performs media negotiation between the first user terminal and the third user terminal associated with the request message, so that the second user terminal and the third user terminal are Performing media negotiation to establish the second user terminal and the third user a call between the user terminals; then, disconnecting the call between the first user terminal and the second user terminal.

Preferably, the above method has the following characteristics:

The request message is an invite message carrying a random cut service code or an invite message carrying a random cut service code and a third user terminal number.

Preferably, the above method has the following characteristics:

The AS performs the media negotiation between the first user terminal and the third user terminal associated with the request message, and after the third user terminal joins the session, the method further includes: the AS to the first user terminal A release request is sent to end the session between the first user terminal and the third user terminal.

Preferably, the above method has the following characteristics:

The step of the media negotiation between the first user terminal and the third user terminal associated with the request message, and the step of performing media negotiation between the second user terminal and the third user terminal includes:

The AS obtains the media information of the first user terminal, sends the media information to the third user terminal, and obtains the media information of the third user terminal, and sends the media information to the first user terminal;

The AS acquires the media information of the second user terminal, sends the media information to the third user terminal, and obtains the media information of the third user terminal, and sends the media information to the second user terminal.

Preferably, the above method has the following characteristics:

The AS disconnects the call between the first user terminal and the second user terminal by sending a release request to the first user terminal. In order to solve the above problem, the present invention provides an implementation system for implementing a call between two parties in a call service, which is applied to an AS, including a random cut trigger module, a media negotiation module, and a release module, where

The random cut triggering module is configured to: when the first user terminal and the second user terminal learn that the first user terminal keeps the existing call, and receives the first user terminal to carry the random cut service code Notifying the media negotiation module when requesting a message; The media negotiation module is configured to: perform media negotiation between the first user terminal and the third user terminal associated with the request message according to the notification of the random cut triggering module, so that the second user terminal and the second user terminal Performing media negotiation between the third user terminals;

The releasing module is configured to: after the media negotiation between the second user terminal and the third user terminal, disconnect the call between the first user terminal and the second user terminal .

Preferably, the above system has the following characteristics:

The releasing module is further configured to: perform media negotiation between the first user terminal and the third user terminal associated with the request message by the media negotiation module, and after the third user terminal joins the session, The first user terminal sends a release request to end the session between the first user terminal and the third user terminal.

Preferably, the above system has the following characteristics:

The media negotiation module is configured to: perform media negotiation between the first user terminal and the third user terminal in the following manner: acquiring media information of the first user terminal, and transmitting the media information to the third user terminal, Media information of the third user terminal is sent to the first user terminal; and media negotiation is performed between the second user terminal and the third user terminal in the following manner: acquiring media of the second user terminal The information is sent to the third user terminal, and the media information of the third user terminal is obtained and sent to the second user terminal.

Preferably, the above system has the following characteristics:

The release module is configured to disconnect the call between the first user terminal and the second user terminal by transmitting a release request to the first user terminal.

The present invention is independent of the terminal, such as a CDMA (Code Division Multiple Access) network or a GSM (Global System for Mobile Communications) network mobile phone, PSTN (Public Switched Telephone Network, Public Switching) Telephone network) terminal, IMS (IP Multimedia Subsystem, IP Multimedia Subsystem) terminal, etc.; does not require the terminal to support the ability to send refer messages, all types of terminals on the current network can operate; can switch the call to the bound user, You can switch the call to the specified user. Moreover, with the rise of 3G networks, the convergence of CS (voice service) and PS (data service) networks has made the invention have a very broad development and use space. BRIEF abstract

FIG. 1 is a schematic diagram of the prior art using a refer message to implement random switching between two parties; FIG. 2 is a flowchart of an application example of the present invention;

FIG. 3 is a signaling flowchart of an application example of the present invention.

Preferred embodiment of the invention

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

The embodiment of the present invention provides a two-way call-free service, in which user A keeps user B during a call with user B, and dials a service code or a service code to add a designated number, and the service cuts the call of user A to user C. User A is logged out and both BCs are talking. After that, the current call can be maintained in B or C. The call is forwarded to other users by dialing the service code or service code plus the specified number. For example, user C can hold user B and call the service code or service code plus the specified number. Switch back to user A and user C exits, and both parties talk. Of course, User C can also switch the call to other users, such as User 0. In this way, the caller's random switching is achieved.

Specifically, it can be implemented as follows:

During the AS call between the first user terminal and the second user terminal, when the AS learns that the first user terminal maintains an existing call, and the AS receives the first user terminal to carry the random service code. When the message is requested, the AS performs media negotiation between the first user terminal and the third user terminal associated with the request message, thereby adding the third user terminal to the session, and then making the second user terminal Performing media negotiation with the third user terminal to establish a call between the second user terminal and the third user terminal; and finally, disconnecting the first user A call between the terminal and the second user terminal.

The first user terminal is a terminal of user A, and may also be referred to as user terminal A; the second user terminal is a terminal of user B, which may also be referred to as user terminal B; and the third user terminal is a terminal of user C, It can be called user terminal C.

The user of the first user terminal can bind the random service code to the third user terminal, so that the request message can be an invitation message (INVITE) carrying a random service code, and does not need to carry the third user terminal number; The request message does not need to be bound, so that the request message carries the third user terminal number, that is, the request message is an invitation message carrying the random service code and the third user terminal number.

In addition, in a specific embodiment, the AS performs media negotiation between the first user terminal and the third user terminal associated with the request message, and after the third user terminal joins the session, to the A user terminal sends a release request to end the session between the first user terminal and the third user terminal.

The AS performs the media negotiation between the first user terminal and the third user terminal that is associated with the request message, where the AS obtains the media information of the first user terminal and sends the information to the third user. Receiving, by the terminal, media information of the third user terminal, and sending the media information to the first user terminal;

The AS performs the media negotiation between the second user terminal and the third user terminal by using the following manner: the AS acquires the media information of the second user terminal, and sends the information to the third user terminal to obtain The media information of the third user terminal is sent to the second user terminal.

In addition, in a specific embodiment, the AS disconnects the call between the first user terminal and the second user terminal by sending a release request to the first user terminal.

Correspondingly, the system for implementing the call switching between the two parties in the call service of the embodiment of the present invention is applied to the AS, including a random cut trigger module, a media negotiation module, and a release module, where

The random cut triggering module is configured to: when the first user terminal and the second user terminal learn that the first user terminal keeps the existing call, and receives the first user terminal to carry the random cut service code Notifying the media negotiation module when requesting a message;

The media negotiation module is configured to: make the first use according to the notification of the random cutting trigger module Performing media negotiation between the third user terminal and the third user terminal that is associated with the request message, and performing media negotiation between the second user terminal and the third user terminal;

The releasing module may be further configured to: perform media negotiation between the first user terminal and the third user terminal associated with the request message by the media negotiation module, and after the third user terminal joins the session, Sending a release request to the first user terminal to end a session between the first user terminal and the third user terminal.

The releasing module is configured to: disconnect the call between the first user terminal and the second user terminal by sending a release request to the first user terminal.

The media negotiation module may be configured to: when media negotiation is performed between the first user terminal and the third user terminal, obtain media information of the first user terminal, send the information to the third user terminal, and obtain the third The media information of the user terminal is sent to the first user terminal; when media negotiation is performed between the second user terminal and the third user terminal, media information of the second user terminal is obtained, and sent to the first The three user terminals acquire media information of the third user terminal and send the media information to the second user terminal. The present invention is further described in detail below based on an IMS or NGN (Next Generation Network) network.

The network elements involved in this application example include:

User Equipment (UE): A device that initiates a call, answers a call, and performs other call operations, such as a CDMA network or a GSM network handset, a PSTN terminal, an IMS terminal, and the like.

Random Switch Application Server (RS AS): Provides the ability to cut the underlying services, such as call control, status reporting, and bill generation.

The RS AS communicates with the UE through the Session Initiation Protocol (SIP) through the core network. In an actual implementation, the RS AS and the UE are connected or anchored to the IMS network or the NGN network. Because the IMS or NGN network topology is prior art, the present invention is omitted. The relevant instructions.

The following is an example of the process of the B being switched to the BC call during the user AB call, and the specific implementation process is as shown in FIG. 2, including:

Step 201: User A is a user who is arbitrarily cut and is in a conversation with user B. User A may be a calling party or a called party.

In step 202, user A maintains user B, and user B listens to the call hold tone.

Step 203: User A dials the random service code or randomly cuts the service code and adds the designated number to the RS AS.

Step 204: The RS AS calls the bound user or the designated user of user A, and is marked as user C. Step 205: After the user C picks up the phone, the RS AS bridges the user B and C, and releases the user A, that is,

BC call, A pass.

Step 206: If user C wants to switch back to user A, then return to step 201, where user A and user C are interchanged.

Figure 3 is a specific signaling flowchart of steps 203 to 205 in Figure 2, including the following steps: Step 301: UE A initiates a call request INVITE (INVITE message) to the RS AS, and carries some call information, such as a random service. Code or freely cut the service code plus the specified number, media information of UE A, and the like.

Step 302: The RS AS sends an INVITE request to the UE C, and carries the media information of the UE A. Step 303: UE C returns 180 response of INVITE to RS AS.

In step 304, the RS AS returns a 180 response of the INVITE to UE A.

Step 305: The UE C returns a 200 OK response of the INVITE to the RS AS, and carries the media information of the UE C.

Step 306: The RS AS returns a 200 OK response of the INVITE to the UE A, and carries the media information of the UE C.

Step 307, the RS AS sends an ACK confirmation message to the UE C.

Step 308: The RS AS sends a BYE request (release message) to UE A, and ends the call between UE A and UE C. Step 309: The RS AS sends a REINVITE request (re-invitation message) to the UE C, and does not carry the media information.

In step 310, UE A returns a 200 OK response of the BYE to the RS AS.

Step 311: The UE C returns a 200 OK response of the REINVITE to the RS AS, and carries the media information of the UE C.

Step 312: The RS AS sends a REINVITE request to the UE B, and carries the media information of the UE C. Step 313: UE B returns a 200 OK response of REINVITE to the RS AS, and carries the media information of UE B. Step 314: The RS AS sends an ACK confirmation message to UE B.

Step 315: The RS AS sends an ACK acknowledgement message to the UE C, and carries the media information of the UE B. Step 316: The RS AS sends a BYE request to UE A, and ends the call between UE A and UE B. Step 317, UE A returns a 200 OK response of the BYE to the RS AS.

At this point, C and B talk, A exits.

In the above process, since A and B talk and keep B as a prior art, it is not described in detail. After C and B talk, after A exits, B or C can also refer to the above process to cut the call back.

A or switch to other users.

In summary, the two-party call-free service in the embodiment of the present invention belongs to a B2B (back-to-back) call type service, and the application server AS records the user's call information at random, and does not need the terminal to support the refer message, and only needs to dial the specific call. The service code or service code plus the specified number can switch a user's call to another user and hang up the original user, which has broad application prospects.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct the associated hardware, such as a read only memory, a magnetic disk, or an optical disk. Optionally, all or part of the steps of the foregoing embodiments may also be implemented by using one or more integrated circuits. Accordingly, each module/unit in the foregoing embodiment may be implemented in the form of hardware, or may use software functions. The form of the module is implemented. The invention is not limited to any specific form of combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

The above embodiments of the present invention are independent of the terminal type, such as a CDMA (Code Division Multiple Access) network or a GSM (Global System for Mobile Communications) network mobile phone, PSTN (Public Switched Telephone Network, Public switched telephone network) terminal, IMS (IP Multimedia Subsystem, IP Multimedia Subsystem) terminal, etc.; does not require the terminal to support the ability to send refer messages, all types of terminals on the current network can operate; can switch calls to bound users , you can also switch the call to the specified user. Moreover, with the rise of 3G networks, the integration of CS (voice service) and PS (data service) networks has made the above-described embodiments of the present invention have a very broad development and use space.

Claims

Claim

A method for implementing a random call between two parties in a call service, including:

During the process of the first user terminal and the second user terminal talking through the application server (AS), when the AS learns that the first user terminal maintains an existing call, and the AS receives the first user terminal and carries the random When the request message of the service code is cut, the AS performs media negotiation between the first user terminal and the third user terminal associated with the request message, so that the second user terminal and the third user terminal are Performing media negotiation to establish a call between the second user terminal and the third user terminal; and then disconnecting the call between the first user terminal and the second user terminal.

2. The method of claim 1 wherein

The request message is an invite message carrying a random cut service code or an invite message carrying a random cut service code and the third user terminal number.

3. The method of claim 1, wherein

After the AS performs the media negotiation between the first user terminal and the third user terminal that is associated with the request message, and after the third user terminal joins the session, the method further includes: A user terminal sends a release request to end the session between the first user terminal and the third user terminal.

4. The method of claim 1, wherein

Obtaining, by the AS, the media information of the first user terminal, and sending the media information to the third user terminal, and acquiring the media information of the third user terminal, and sending the information to the first user terminal;

The AS acquires the media information of the second user terminal, sends the media information to the third user terminal, and obtains the media information of the third user terminal, and sends the information to the second user terminal.

The method according to any one of claims 1 to 4, wherein in the step of disconnecting the call between the first user terminal and the second user terminal, The AS disconnects the call between the first user terminal and the second user terminal by sending a release request to the first user terminal.

An implementation system for implementing a call between two parties in a call service, which is applied to an application server (AS), including a random switch trigger module, a media negotiation module, and a release module, where

The media negotiation module is configured to: perform media negotiation between the first user terminal and the third user terminal associated with the request message according to the notification of the random cut triggering module, so that the second user terminal and the second user terminal Performing media negotiation between the third user terminals;

The releasing module is configured to: after the media negotiation module performs media negotiation between the second user terminal and the third user terminal, disconnect between the first user terminal and the second user terminal Call.

7. The system of claim 6 wherein

8. The system of claim 6 wherein

9. The system of claim 6 wherein

10. The system according to any one of claims 6 to 9, wherein