WO2011153753A1

WO2011153753A1 - Method, system and application server for achieving call waiting in click to dial service

Info

Publication number: WO2011153753A1
Application number: PCT/CN2010/077184
Authority: WO
Inventors: 彭磊; 毕沈勇
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-06-08
Filing date: 2010-09-21
Publication date: 2011-12-15
Also published as: CN101860542A

Abstract

The invention provides a method, a system and an application server for achieving call waiting in a click to dial (CTD) service. A first terminal in a talking state and a second terminal in a new call in the CTD service are involved. The method includes: the second terminal sends a call request message to the first terminal via a CTD application server (CTD AS); the CTD AS notifies a CTD web server (CTD WS) that a new call is accessed; the first terminal commands the second terminal to perform call waiting, and sends a call waiting request message to the CTD AS via the CTD WS; and the CTD AS notifies the second terminal that it is in a called connection, and controls a media resource server (MRS) to play a call waiting tone for the second terminal simultaneously. The method fills the blank of the call waiting function in the CTD service, thus enabling the CTD service to adapt the requirements of an intelligent network communication system.

Description

Method, system and application server for implementing call waiting in CTD service

Technical field

The present invention relates to an IP Multimedia Subsystem (IMS) and an intelligent network communication technology under a Next Generation Network (NGN), and more particularly to implementing call waiting in a Click To Dial (CTD) service. Method, system and application server. Background technique

The CTD service is a call-type service that enables two-way or multi-party calls by bridging the two or more parties' telephone numbers that the user wishes to make a call.

The traditional call service, that is, the user directly dials the destination telephone number through a terminal (such as a fixed telephone, a mobile phone, etc.). The CTD call is such a call: The CTD application server (AS) separately initiates two or more phone numbers that need to be called, and then bridges the two or more parties that need to answer the call. .

The CTD service belongs to a back-to-back (B2B) call type service and has been widely used in current communication networks. For example: WebCall, Web800, etc., all belong to the CTD call service or its derivative business. The advantages of the CTD service are: Provide a visual call service. The visualization here means that the user can check the status of the current call through the operation interface of the CTD call, such as: the telephone number and name of the two parties on the call, and the call status (eg, the called ringing, the called party answer, the called party hangs up, The called call is on hold, etc.), not the video call. In order to make the call interface more beautiful, the CTD service can even display the avatars used by both parties (ie, call user tags) on the operation interface, and the service can further extend the Instance Message (IM) service of both parties (such as QQ network). Chat, etc.) Moreover, with the rise of 3G networks, the integration of CS (Circuit Switch Switch) and Packet Switch (PS) networks has made CTD services have a very broad development prospect and space for use.

As shown in FIG. 1 , each network element in a network system that implements a CTD service mainly includes: a login terminal, a webpage or a client for providing a call or a call control to a user. Terminal device of the end software;

Web page or client software refers to an operation interface that users can log in to the Web; terminal devices such as PCs, 3G terminals, etc., which communicate with CTD WS through Hypertext Transfer Protocol (HTTP) as an HTTP service function. Call to interact.

CTD web server (CTD WS) for providing CTD calls

HTTP service function;

The HTTP service functions include user login, call number filling, call control, and information display interface.

The CTD WS communicates with the CTD AS for inter-server communication. The transport layer uses the Transfer Control Protocol (TCP). The application layer protocol can be selected by the Extensible Markup Language (XML) according to specific needs. The implemented TCP message body or message body structure; if the application layer protocol is not used, the TCP message body or the TCP message body structure can be customized.

CTD Application Server (CTD AS) provides the underlying CTD service capabilities;

The underlying CTD service capabilities provided by the CTD AS, such as call control, status reporting, and bill generation.

Media Resource Server (MRS) for providing voice media capabilities;

MRS is generally implemented through a Media Server (MS). The voice media capabilities provided by MRS are voice media other than call voice, such as ringing tones, waiting tones, prompts, and voice menus.

The user terminal (UE) is used for the user to use the call.

The specific call terminal includes one or more of a fixed telephone, a mobile phone or a professional video call terminal.

The CTD AS communicates with the MRS or the UE for the media of the call. The CTD AS communicates with the UE through the Session Initiation Protocol (SIP) through the core network. The SIP or Media Gateway Control Protocol is usually used between the CTD AS and the MRS. Media Gate Control Protocol, MGCP) depends on the type of protocol supported by MRS.

Note: In Figure 1, only a schematic diagram is shown. It omits the topology of IMS or NGN. The CTD AS, MRS and UE in the actual network system are interconnected by accessing IMS or NGN.

Due to the development of communication technology, call waiting service has appeared in the traditional call service, and the process thereof is as shown in FIG. 2, including the following steps:

110: A user A is in the process of talking with the user B, and another user C calls the user A;

120: The CTD service determines whether user A causes user C to wait, if yes, the next step is performed, otherwise step 140 is performed;

130: The CTD service notifies the user C to wait, and plays a call waiting tone to it; then ends the process;

User A can make user C wait on the operation interface of the call waiting service on his telephone terminal and then talk to him later.

140: The CTD service keeps user B, user A answers user C; ends the process.

User A can also perform call hold processing on the operation interface on his telephone terminal, that is, user B keeps and listens to user C.

The use of the call waiting service function, the terminal that needs the user's call has the capability, that is, the operation interface supporting the call waiting service. Not all terminals have this capability, and the telephone terminal that the user needs to use has certain hardware and software functions.

At present, in the CTD service of the intelligent network communication system, there is no method and system for implementing the call waiting service function, and it has been very unsuitable for the rapidly developing IMS and NGN requirements. Therefore, it is urgent to develop a call waiting service function in the CTD services of IMS and NGN. Summary of the invention

The technical problem to be solved by the present invention is to provide a method and system for implementing call waiting in a click-to-dial service to fill the gap of the call waiting function in the CTD service. In order to solve the above technical problem, the present invention provides a method for implementing call waiting in a click-to-dial (CTD) service, involving a first terminal in a call state and a second terminal in a new call in the CTD service; :

The second terminal sends a call request message to the first terminal through the CTD application server (CTD AS), and the CTD AS notifies the CTD web server (CTD WS) that there is a new call access;

The first terminal causes the second terminal to wait for a call, and sends a call waiting message to the CTD AS through the CTD WS;

The CTD AS notifies the second terminal that it is in the called connection, and controls the Media Resource Server (MRS) to play the call waiting tone to the second terminal.

In the step of the second terminal sending a call request message to the first terminal, the second terminal passes the CTD

The signaling interaction of the AS sends a call request message to the first terminal, including:

The second terminal sends a call request message to the first terminal, where the call request message carries the media information of the second terminal, and the call request message passes through the CTD AS;

The CTD AS sends a response message to the second terminal indicating that the call request message has been received.

The step of the first terminal sending a call waiting request message to the CTD AS by using the CTD WS includes: the CTD WS performs signaling interaction with the CTD AS, and forwards the call waiting request message of the first terminal to the CTD AS, and receives Call waiting response message returned to the CTD AS.

The step of the CTD AS notifying that the second terminal is in the called connection, the CTD AS notifying that the second terminal is in the called connection by the signaling interaction with the second terminal, the method includes: the CTD AS sending the indication to the second terminal a message that is in the called connection, and receives a response message returned by the second terminal;

The CTD AS returns an acknowledgement message to the second terminal, and sends a response message to the second terminal, where the sent response message carries the media information of the MRS;

The second terminal returns a confirmation message to the CTD AS;

In the step of the CTD AS controlling the MRS to play the call waiting tone to the second terminal, the CTD AS controls the MRS to play the call waiting tone to the second terminal by using the signaling interaction with the MRS, including:

The CTD AS sends a request message to the MRS that relies on playing a call waiting tone to the second terminal; The MRS returns a response to the CTD AS for the request message for playing the call waiting tone to the second terminal, and returns a message containing the playback result to the CTD AS;

The CTD AS returns a response message to the MRS for the message containing the playback result.

The method also includes:

The CTD AS reports the current call waiting state of the second terminal to the CTD WS.

In order to solve the above technical problem, the present invention provides a system for implementing call waiting in a click-to-dial (CTD) service, comprising: a first terminal in a call state in a CTD service, a second terminal of a new call, and a CTD web server ( CTD WS), CTD Application Server (CTD AS) and Media Resource Server (MRS);

The second terminal is configured to: send a call request message to the first terminal by using the CTD AS;

The CTD AS is configured to: notify the CTD WS that there is a new call access; after receiving the call waiting request message of the first terminal forwarded by the CTD WS, notify the second terminal that it is in the called connection, and simultaneously control the MRS to play to the second terminal. Call waiting tone

The first terminal is configured to: send a call waiting request message to the CTD AS through the CTD WS after waiting for the second terminal to wait;

The CTD WS is set to: After receiving the new call access notification of the CTD AS, forward the call waiting request sent by the first terminal to the CTD AS.

The second terminal is further configured to: the call request message sent to the first terminal carries the media information of the second terminal, where the call request message passes through the CTD AS;

The CTD AS is further configured to: after receiving the call request message, send a response message indicating that the call request message has been received to the second terminal.

The CTD WS is configured to: perform signaling interaction with the CTD AS, forward the call waiting request message of the first terminal to the CTD AS, and receive a call waiting response message returned by the CTD AS.

CTD AS is set to:

Notifying that the second terminal is in the called connection by performing signaling interaction with the second terminal; controlling the MRS to play the call waiting tone to the second terminal by signaling interaction with the MRS. The CTD WS is further configured to: obtain the current call waiting state of the second terminal by reporting the CTD AS.

The present invention also provides a CTD Application Server (CTD AS) for implementing call waiting in a click-to-dial (CTD) service, relating to a first terminal in a call state and a second terminal in a new call in the CTD service;

The CTD AS is configured to: notify the CTD Web server (CTD WS) that there is a new call access; after receiving the call waiting request message of the first terminal forwarded by the CTD WS, notify the second terminal that the second terminal is in the called connection At the same time, the media resource server (MRS) is controlled to play a call waiting tone to the second terminal.

The CTD AS is further configured to: after receiving the call request message, send a response message indicating that the call request message has been received to the second terminal; where the second terminal carries the call request message sent by the first terminal Media information of the second terminal.

The CTD AS is set to:

Notifying that the second terminal is in the called connection by performing signaling interaction with the second terminal; controlling the MRS to play the call waiting tone to the second terminal by signaling interaction with the MRS.

The method and system for implementing call waiting service in the CTD service provided by the present invention fills the blank of the call waiting function in the CTD service, so that the CTD service can adapt to the rapid development of the intelligent network communication system. BRIEF abstract

FIG. 1 is a main network element structure diagram of a network system for implementing a CTD service;

2 is a flow chart of a conventional call waiting method in a conventional call service;

3 is a flowchart of an embodiment of a call waiting method in a click-to-dial service according to the present invention; FIG. 4 is a specific signaling interaction flowchart of the method embodiment shown in FIG. Preferred embodiment of the invention The technical solutions of the present invention are described in detail below with reference to the accompanying drawings and preferred embodiments. The following exemplified embodiments are only intended to illustrate and explain the present invention, and do not constitute a limitation of the technical solutions of the present invention.

As shown in FIG. 3, the flow of the method for implementing a call waiting method in a click-to-dial service provided by the present invention includes the following steps:

210: During the UE-A and UE-B call, the UE-C sends a call request message to the UE-A through the CTD AS.

The UE-C sends a call request message to the UE-A by performing signaling interaction with the CTD AS, where the message carries the media information of the UE-C.

220: The CTD AS notifies the CTD WS that there is a new call access;

230: The called UE-A causes the UE-C call to wait, and sends a call waiting request to the CTD AS through the CTD WS;

The CTD AS notifies the new call to access and receive the call waiting request of UE-A through the signaling interaction with the CTD WS.

240: The CTD AS notifies that the UE-C is in the called connection, and controls the MRS to play the call waiting tone to the UE-C;

The CTD AS notifies the UE-C that it is currently in the called connection by performing signaling interaction with the UE-C. By controlling the signaling interaction with the MRS, the MRS is controlled to create a session for the playback operation and play the call to the UE-C through the session. Wait for a notification tone or ringback tone.

250: The CTD AS reports the current state of the UE-C to the CTD WS.

FIG. 4 is a specific signaling interaction process of the method embodiment shown in FIG. 3, wherein the numbers are as follows:

The A number indicates the signaling interaction between the CTD WS and the CTD AS. The B number indicates the signaling interaction between the CTD AS and the MRS. The C number indicates the signaling interaction between the CTD AS and the UE-C.

The above signaling interaction process includes:

Step C1: The UE-C sends an Invite message to the UE-A to request a call with the UE-A. The message passes through the CTD AS, and carries the media information of the UE-C. Step C2: The CTD AS sends 100 Trying to the UE-C indicating that the request has been received.

Step A1: The CTD AS notifies the CTD WS that there is currently a new call access;

Step A2: The called UE-A causes the UE-C to wait for a call, and sends a call waiting request to the CTD AS through the CTD WS;

Step A3: The CTD AS returns a call waiting response message;

Step B1: The CTD AS sends an Invite SIP message to the MRS to create a session for the playback operation. In step B2, the MRS returns a 200 OK response message to the CTD AS, and carries the MRS media message. Step B3, the CTD AS returns an ACK confirmation message.

Step C3, the CTD AS returns 180 Ringing to the UE-C, indicating that it is in the called connection; Step C4, the UE-C returns a 180 PRACK response message to the CTD AS;

Step C5, the CTD AS returns a 200 PRACK confirmation message;

Step C6: The CTD AS sends a 200 OK response message to the UE-C, where the message carries the MRS media information.

Step C7, UE-C returns an ACK acknowledgement message;

Step B4: The CTD AS sends an INFO message to the MRS, requesting to play a call waiting notification tone or a ringback tone to the UE-C;

Step B5, the MRS returns a 200 OK response message of the INFO;

Step B6, the MRS returns an INFO message containing the playback result to the CTD AS;

Step B7, the CTD AS returns a 200 OK response message of the INFO;

Step A4: The CTD AS reports to the CTD WS that the current state of the UE-C is call waiting.

For the above method embodiment, the present invention further provides an embodiment of implementing a call waiting system in a click-to-dial service, the system comprising a new calling user terminal UE-C, CTD AS. CTD WS and MRS, wherein:

UE-C, used to make one of the two call users during the call, through the CTD AS Calling the user UE-A to send a call request message;

The UE-C sends a call request message to the UE-A by performing signaling interaction with the CTD AS, and the message carries the media information of the UE-C.

The CTD AS is configured to notify the CTD WS that there is a new call access, and after receiving the call waiting request of the UE-A forwarded by the CTD WS, notify the UE-C that it is in the called connection, and control the MRS to play the call to the UE-C. Waiting for the tone, and reporting the current state of the UE-C to the CTD WS;

The CTD WS is configured to forward the call waiting request sent by the UE-A to the CTD AS after receiving the new call access notification of the CTD AS, and obtain the current call waiting state of the UE-C through the CTD AS.

One of ordinary skill in the art will appreciate that all or a portion of the steps above may be accomplished by a program to instruct the associated hardware, such as a read-only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module (or unit) in the foregoing embodiment may be implemented in the form of hardware or in the form of a software function module. The invention is not limited to any particular form of hardware or software combination.

Industrial applicability

The method and system for implementing call waiting service in the CTD service provided by the present invention fills the blank of the call waiting function in the CTD service, so that the CTD service can adapt to the rapid development of the intelligent network communication system.

Claims

Claim

A method for implementing call waiting in a click-to-dial (CTD) service, relating to a first terminal in a call state and a second terminal in a new call in the CTD service; the method comprising:

The second terminal sends a call request message to the first terminal by using a CTD application server (CTD AS), and the CTD AS notifies the CTD Web server (CTD WS) that there is a new call access;

The first terminal causes the second terminal to wait for a call, and sends a call waiting request message to the CTD AS through the CTD WS;

The CTD AS notifies the second terminal that it is in the called connection, and controls the Media Resource Server (MRS) to play a call waiting tone to the second terminal.

2. The method according to claim 1, wherein, in the step of the second terminal transmitting a call request message to the first terminal, the second terminal sends a call request message to the first terminal by using a signaling interaction with the CTD AS, Includes:

The second terminal sends a call request message to the first terminal, where the call request message carries media information of the second terminal, and the call request message passes through the CTD AS;

3. The method according to claim 1, wherein the step of the first terminal transmitting a call waiting request message to the CTD AS by using the CTD WS comprises: signaling interaction between the CTD WS and the CTD AS And forwarding a call waiting request message of the first terminal to the CTD AS, and receiving a call waiting response message returned by the CTD AS.

The method according to claim 1, wherein the CTD AS notifies the second terminal that the terminal is in the called connection, and the CTD AS notifies the second terminal that the second terminal is in the signaling interaction with the second terminal. The called connection, including:

The CTD AS sends a message indicating that it is in the called connection to the second terminal, and receives a response message returned by the second terminal;

The CTD AS returns an acknowledgement message to the second terminal, and sends a response message to the second terminal, where the sent response message carries the media information of the MRS; The second terminal returns an acknowledgement message to the CTD AS;

Sending, by the CTD AS, a request message to the MRS to play a call waiting tone to the second terminal;

The MRS returns a response message to the CTD AS for the request message for playing a call waiting tone to the second terminal, and returns a message containing the playback result to the CTD AS;

The method according to any one of claims 1 to 4, the method further comprising: reporting, by the CTD AS, the current call waiting state of the second terminal to the CTD WS.

6. A system for implementing call waiting in a click-to-dial (CTD) service, comprising: a first terminal in a call state and a second terminal of a new call in the CTD service, a CTD WS (CTD WS), a CTD application Server (CTD AS) and Media Resource Server (MRS); where:

The second terminal is configured to: send a call request message to the first terminal by using the CTD AS; the CTD AS is configured to: notify the CTD WS that there is a new call access; and receive the first terminal forwarded by the CTD WS After the call waiting for the request message, the second terminal is notified that the second terminal is in the called connection, and the MRS is controlled to play the call waiting tone to the second terminal;

The first terminal is configured to: after the second terminal calls the call, through the CTD WS to the

The CTD AS sends a call waiting request message;

The CTD WS is configured to: after receiving the new call access notification of the CTD AS, forward the call waiting request sent by the first terminal to the CTD AS.

7. The system according to claim 6, wherein

The second terminal is further configured to: the call request message sent to the first terminal carries the media information of the second terminal, where the call request message passes the CTD AS;

The CTD AS is further configured to: after receiving the call request message, send a table to the second terminal A response message that the call request message has been received is shown.

8. The system according to claim 6, wherein the CTD WS is configured to: perform signaling interaction with the CTD AS, forward a call waiting request message of the first terminal to the CTD AS, and receive The call waiting response message returned by the CTD AS.

The system according to claim 6, wherein the CTD AS is configured to: notify, by signaling interaction with the second terminal, that the second terminal is in the called connection; by signaling interaction with the MRS Controlling the MRS to play a call waiting tone to the second terminal.

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

The CTD WS is further configured to: learn, by the uppermost node of the CTD AS, a current call waiting state of the second terminal.

11. A CTD application server (CTD AS) for implementing call waiting in a click-to-dial (CTD) service, relating to a first terminal in a call state and a second terminal in a new call in the CTD service;

The CTD AS according to claim 11, wherein the CTD AS is further configured to: after receiving the call request message, send a response message indicating that the call request message has been received to the second terminal;

The call request message sent by the second terminal to the first terminal carries the media information of the second terminal.

The CTD AS according to claim 11, wherein the CTD AS is configured to: notify, by signaling interaction with the second terminal, that the second terminal is in the called connection; and signaling by using the MRS Interactively controlling the MRS to play a call waiting to the second terminal