KR20080064068A - Method and system for providing service communication in a communication system - Google Patents

Abstract

A method and a system for providing a service in a communication system are provided to enable one participant, who is now speaking, to yield a right of speaking in case that other participant requests a right of speaking such that a PoC(Push to talk over Cellular) server effectively manages conversations made in a PoC session. A method for providing a service in a communication system comprises the following several steps. The first terminal transmits a TB-REQ(Talk Burst Request) message to a PoC server(307). The server transmits a TB-GRNT(Talk Burst Granted) message to the first terminal in case that there is no participant having a right of speaking in a current session(309) and the first terminal obtains the right of speaking(311). If the second terminal transmits the TB-REQ message to the PoC server(313), the PoC server checks whether the second terminal supports a speaking right queueing function(315). If not in the step 315, the server transmits a TB-DNY(Talk Burst Deny) message to the second terminal(317). Then, the server transmits a TB-YLD_REQ(Talk Burst Yield Request) message to the first terminal for notifying the first terminal that there exists a participant who requests a right of speaking(321). If so in the step 315, the server transmits a TB-QS_RSP(talk burst Queue Status Response) message to the second terminal for notifying the second terminal that the TB-REQ is queued(319).

Description

METHOD AND SYSTEM FOR PROVIDING SERVICE COMMUNICATION IN A COMMUNICATION SYSTEM}

1 illustrates a general PoC structure

2 is a diagram illustrating a general talk right request processing procedure in a PoC communication system;

3 is a diagram illustrating a voice request processing procedure according to an embodiment of the present invention.

4 is a flowchart illustrating a process for processing a floor right request by a PoC server according to an embodiment of the present invention.

5 is a diagram illustrating a format for claiming concession request message according to an embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication system, and more particularly, to a method and a system for controlling a talk right of a push to talk (PTT) service.

In the 4th generation (4G) communication system, which is the next generation communication system, due to the breakthrough in mobile communication and the expansion of the communication network, more and more various services and applications using a mobile phone are provided. In addition, the needs of users are diversified, and are expanding from simple call services to location services, multimedia services, and PTT services. In particular, the PTT service supports various additional functions such as instant messenger and status display, as well as group calls and voice calls, which have been possible in conventional radios or TRS (Trunked Radio System).

On the other hand, the establishment of standards for PoC (Push-to-talk over Cellular) service that uses the PTT concept using a mobile communication network is actively discussed. One of the distinguishing features of the PoC service from the existing mobile communication service is that the user belongs to a plurality of sessions so that the user can make a call while moving between sessions as necessary. The above requirement that the user should be able to talk while moving a plurality of sessions is specified in the requirements of the Open Mobile Alliance (OMA), an organization that defines mobile communication services.

Next, the PoC network structure that is the basis of the PTT service will be described in detail with reference to FIG. 1.

1 is a conceptual diagram of a general PoC basic structure.

Referring to FIG. 1, a PoC network includes a PoC client 101, a SIP / IP core 103, and a PoC server 105.

The PoC client 101 serves to transmit or receive a call message to a terminal requesting a PTT service and is connected to the SIP / IP core 103. The PoC server 105 serves as a subject for providing a PTT service and processes PTT session management and right to speak control, and is connected to the SIP / IP core 103. The SIP / IP core 103 transmits SIP messages 107 and 109 to the PoC server 105 and the PoC client 105 as a core network supporting the Session Initiation Protocol (SIP) and the Internet Protocol (IP) multimedia.

In addition, the PoC client 105 is connected to the PoC server 105 via the RTP / RTCP / TBCP (111). The Real-Time Transport Protocol (RTP) is a protocol used to transmit voice data and video data in real time in a PoC service, and includes the voice data and video data packets. The RTCP (RTP Control Protocol) is used to report an RTP transmission status and the like as the RTP control protocol. Finally, the talk burst control protocol (TBCP) is a speech control protocol defined in the OMA based on the application packet of the RTCP.

The PTT service based on the PoC network of FIG. 1 described above is a one-way service in which only a participant who has obtained a voice among session participants can transmit media. In other words, if any one participant acquires the floor and the other participant requests the floor, the PoC server may reject the floor. In addition, if the terminal of the participant who requested the floor right supports a queuing function, the PoC server may store the floor right request in a floor right queue. When the participant in the speaking releases the speech, the speaker of the speaking right queue finds the highest priority speaking right request and grants the speaking right. Next, a general voice request processing procedure will be described in detail with reference to FIG. 2.

2 is a diagram illustrating a general talk right request processing procedure in a PoC based communication system. In the PoC system defined by OMA, for example, a message is transmitted and received using TBCP (Talk Burst Control Protocol).

Referring to FIG. 2, a PoC communication system includes a first terminal 201, a server 203, and a second terminal 205.

First, the first terminal 201 transmits a talk burst request (TB-REQ: TB-REQ) message to the server 203 (step 207). When the server 203 receiving the TB-REQ message does not have a participant who has a right to speak in the current session, the server 203 gives a talk right to the first terminal 201 (TB-GRNT: Talk Burst Granted, hereinafter referred to as 'TB-GRNT'). Message) (step 209), and the first terminal 201 acquires a voice (step 211).

In this case, when the second terminal 205 transmits a TB-REQ message to the server 203 (step 213), the server 203 checks whether the second terminal 205 supports the voice queuing function (step 213). Step 215). If the second terminal 205 does not support the voice queuing function as a result of the test, the server 203 rejects the talk Burst Deny (TB-DNY) in the second terminal 205. Message) (step 217) to indicate that the request to speak is denied. On the other hand, if the second terminal 205 supports the voice queuing function, the server 203 calls the voice queuing message (TB-QS_RSP: Talk burst Queue Status Response, 'TB-QS_RSP') in the second terminal 205. (Step 219) to indicate that the floor request has been queued.

As described above, in the PTT service, if one participant has a talk right and the other participants request a talk right from the server during the talk, the server rejects the talk right request. On the other hand, if the terminal of the participant requesting the floor supports the queuing function, the server stores the floor right request in the floor. When the participant who is currently speaking releases the speech, the first priority speech right request is found in the speech request queue, and the right to speak is granted. However, there is a problem in that the participant who is currently speaking cannot know that there is another participant who wants to speak.

Accordingly, an object of the present invention is to provide a method and a system for controlling the talk right of a push to talk (PTT) service in a communication system.

The method of the present invention for achieving the above objects; In a communication system, a method of processing a talk request of a server, the server receiving a talk request (TB-REQ) message (TB-REQ), and the server is connected to a current session. A process of checking whether there is a terminal that has acquired a right to speak, and if a terminal having a right to speak exists in the current session as a result of the test, a request for yielding a talk right to the terminal having the right to speak (TB-YLD_REQ: hereinafter, 'TB-YLD_REQ And a process of transmitting a message.

The system of the present invention for achieving the above objects; In the communication system, in the talk right request processing procedure, a TB-REQ message is received and a terminal having a talk right is acquired in the current session, and if a terminal having a talk right exists in the current session as a result of the check, It characterized in that it comprises a server for transmitting a TB-YLD_REQ message to the terminal.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, only parts necessary for understanding the operation of the present invention will be described, and other background art will be omitted so as not to distract from the gist of the present invention.

The present invention relates to a method and system for controlling the talk right of a push to talk (PTT) service in a push-to-talk over cellular (PoC) based communication system. Suggest. Since the PoC network structure of the present invention to be described later is the same as the PoC network structure of Figure 1 described in the prior art, it will be omitted in the following description.

The PTT service based on the PoC network is a one-way service in which only a participant who has obtained a right to speak among session participants can transmit media. In other words, if any one participant is speaking with the other participant speaking, the other participant requests the right to speak. In addition, if the terminal of the participant who requested the floor right supports a queuing function, the PoC server may store the floor right request in a floor right queue. When the speaking participant releases the speech, the highest priority speaking right request is found in the speaking right queue, and the speaking right is given. Then, with reference to Figure 3 will be described in detail with respect to the voice request processing procedure according to an embodiment of the present invention in a PoC-based communication system.

3 is a diagram illustrating a voice request processing procedure according to an embodiment of the present invention. In the PoC system defined by the Open Mobile Alliance (OMA), a message is transmitted and received using, for example, a talk burst control protocol (TBCP).

Referring to FIG. 3, a PoC communication system includes a first terminal 301, a server 303, and a second terminal 305.

First, the first terminal 301 transmits a talk burst request (TB-REQ) message to the server 303 (hereinafter referred to as TB-REQ) (step 307). When the server 303 which has received the TB-REQ message does not have a participant who has a voice in the current session, the server 303 grants a voice to the first terminal 301 (TB-GRNT: Talk Burst Granted). A message is transmitted (step 309), and the first terminal 301 obtains a voice (step 311).

In this case, when the second terminal 305 transmits a TB-REQ message to the PoC server 303 (step 313), the server 303 checks whether the second terminal 305 supports the voice queuing function. (Step 315). If the second terminal 305 does not support the queuing function as a result of the test, the server 303 may call the second terminal 305 a Talk Burst Deny (TB-DNY). Message) (step 317), indicating that the right to speak is denied. Then, the server 303 sends a message yield request (TB-YLD_REQ: Talk burst Yield Request (TB-YLD_REQ)) message to the first terminal 301 that is currently speaking (step 321). Inform them that there is a participant who is currently requesting a say.

On the other hand, if the second terminal 205 supports the voice queuing function, the server 303 is a talk burst queuing message (TB-QS_RSP: Talk burst Queue Status Response, 'TB-QS_RSP') to the second terminal 305 (Step 319) to indicate that the floor request has been queued. The server 303 then sends a TB-YLD_REQ message to the first terminal 301 that is currently speaking (step 321) to inform that there is a participant requesting the right to speak.

Then, with reference to Figure 4 in the PoC-based communication system will be described in detail with respect to the processing of the talk request request of the PoC server according to an embodiment of the present invention.

4 is a flowchart illustrating a process for processing a floor right request by a PoC server according to an embodiment of the present invention.

Referring to FIG. 4, first, in step 401, the server receives a TB-REQ message from a terminal desiring to speak and proceeds to step 403. In step 403, the server checks whether there is a terminal that has obtained a voice in the current session. As a result of the check in step 403, if there is a terminal that has the right to speak in the current session, it is checked whether the terminal requesting the right to speak supports the queuing function. As a result of the checking in step 405, if the floor requesting terminal supports the queuing function, the process proceeds to step 407. In step 407, the server stores the talk right request in the talk right queue and proceeds to step 409. In step 409, the server sends a TB-QS_RSP message to the terminal requesting the right to speak, notifying that the right to speak has been stored in the queue, and proceeds to step 411. In step 411, the server sends a TB-YLD_REQ message to the terminal that is currently speaking to inform that there is a terminal requesting the right to speak.

On the other hand, in step 403, if there is no terminal that has obtained the speaking right in the current session, the server proceeds to step 413. In step 413, the server sends a TB-GRNT message to the terminal requesting the right to speak, and the terminal requesting the speaking right obtains the speaking right.

On the other hand, in step 405, the server proceeds to step 415 if the terminal requesting the voice does not support the queuing function. In step 415, the server sends a TB-DNY message to the talk requesting terminal, notifying that the talk request is denied, and proceeds to step 417. In step 417, the server sends a TB-YLD_REQ message to the UE having the right to speak in the current session to inform that there is a participant requesting the right to speak.

Next, the TB-YLD_REQ message format according to the embodiment of the present invention will be described with reference to FIG. 5.

5 illustrates a TB-YLD_REQ message format according to an embodiment of the present invention.

Referring to FIG. 5, 10011 of a subtype field is a value indicating that the message is a TB-YLD_REQ message. In addition, the SDES item CNAME of the application-dependent data field represents a nickname of the speaker, and the SDES item NAME of the application-dependent data field represents an identifier of the speaker.

Meanwhile, other fields except the subtype field and the application-dependent data field are not directly related to the present invention and thus will be omitted.

In the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by those equivalent to the scope of the claims.

As described above, in the Push-to-talk over Cellular (PoC) communication system, when a participant is speaking in a current session and another participant requests a right to speak, the presenter informs the participant who is currently speaking to yield the right to speak. To help. Accordingly, the PoC server can more effectively manage conversations that are being made in the PoC session.

Claims (12)

In a communication system, a method of processing a floor request of a server, Receiving, by the server, a voice request message from a first terminal; Determining, by the server, whether there is a second terminal having a voice; And if the second terminal exists, transmitting a floor concession request message to the second terminal. The method of claim 1, The talk right concession request message is a message indicating that the server informs the second terminal that there is another terminal requesting a talk right now. The method of claim 1, If the first terminal supports the queuing function, The server further comprises the step of storing a talk request of the first terminal in a talk queue, and transmitting a talk queuing message indicating that the talk request has been stored to the first terminal. The method of claim 1, If the first terminal does not support the queuing function, And a step of transmitting a utterance rejection message indicating that the utterance request has been rejected to the first terminal. The method of claim 1, Sending and receiving the message using a talk burst control protocol (TBCP) characterized in that the server talk request processing method. The method of claim 1, And the voice concession request message includes identifier information of the first terminal. In the communication system, the floor request processing system, Receiving a voice request message from the first terminal, Judging whether there is a second terminal with the right to speak, And a server for transmitting a voice concession request message to the second terminal if the second terminal exists as a result of the determination. The method of claim 7, wherein The talk right concession request message is a talk right request processing system, wherein the server informs the second terminal that there is another terminal requesting a talk right. The method of claim 7, wherein If the first terminal supports the queuing function, A server for storing a talk request of the first terminal in a talk queue, transmitting a talk queuing message indicating that the talk request has been stored to the first terminal, and transmitting a talk yield concession message to a terminal having talk in the current session; Voice Request Processing System. The method of claim 7, wherein If the first terminal does not support the queuing function, And a server for transmitting a utterance rejection message informing the first terminal that the utterance request has been denied. According to claim 7, The message request processing system, characterized in that the transmission and reception of the message using TBCP (Talk Burst Control Protocol). According to claim 7, The talk right concession request message includes identifier information of the first terminal.

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