KR20080034068A - Method and system for transmitting and applying chat poc group information in chat poc session - Google Patents

Abstract

A method for transferring and applying chat PoC(PTT(Push To Talk) over Cellular) group in a chat PoC session and a system for implementing the same are provided to include group information in a group advertisement message and transfer it to PoC clients included in a reception list so that a PoC client that does not support an item included in the group information not may not join a session. A chat PoC session initiation requesting PoC UE(User Equipment)(100) stores PoC group information corresponding to a chat PoC group ID in an XDMS(XML(eXtensible Markup Language) Document Management Server). When the chat PoC session initiation requesting PoC UE initiates a PoC session, it transmits a session participation request message including the chat PoC group ID to a PoC server. When a PoC server(150) receives the session participation request message, it checks the stored PoC group information through the XDMS and initiates a session by applying the checked PoC group information to the chat PoC session that has requested the initiation. The PoC server includes the checked PoC group information in a response message and transfers the same to the chat PoC session initiation requesting PoC UE.

Description

Method and System for Transmitting and Applying Chat PoC Group Information in Chat PoC Session}

1 is a configuration diagram of a general PoC service system;

2 is a functional block diagram of a general PoC server;

3 is a diagram illustrating a Controlling PoC Function block and a Participating PoC Function block of a PoC server;

4 is a signal flow diagram between a PoC XDMC and an XDMS server for storing and managing Chat PoC group information according to an embodiment of the present invention;

5 is a signal flow diagram between a PoC terminal and a PoC server for delivering Chat PoC group information in a Chat PoC session according to an embodiment of the present invention;

6 is an exemplary diagram illustrating a specific format of a group advertisement message for advertising a Chat PoC group to another PoC client by a Chat PoC group session initiator according to an embodiment of the present invention.

The present invention relates to a method and system for delivering Chat PoC group information used in a Chat PoC session when a PoC client opens a Chat PoC session or joins an established Chat PoC session, and applies the same to a Chat PoC session. .

Due to the revolutionary development of mobile communication and the expansion of communication networks, more expanded and various services and applications using mobile phones are provided. In addition, the needs of users are diversified, and beyond the simple call service, the service is expanding to location services, multimedia services, and push-to-talk (PTT) services, etc. In particular, the PTT service is a conventional radio or TRS (Trunked Radio) service. It supports various additional functions such as instant messenger and status display as well as group call and voice call.

Currently, the establishment of standards for PoC (PTT over Cellular) service that uses this PTT concept using a mobile communication network is actively discussed. One is that a user can belong to multiple sessions so that they can make calls while moving from session to session as needed. It is specified in the requirements of the Open Mobile Alliance (OMA), an organization that defines mobile services.

Meanwhile, the PoC V 2.0 system supports PoC multimedia call service. To this end, the Poc V 2.0 system defines video, images and text as new multimedia types in addition to voice. In addition, current PoC systems can display multiple streams, such as video or images, due to the improved performance of the terminal.

In addition, in order to support more extended PoC services, the PoC V2.0 system defines various Media Burst Control Schemes, so that the PoC server and PoC Client can establish PoC sessions according to one of a plurality of floor management rules. You can also set up and manage your voice.

As described above, the conventional PoC technology defines group-related information such as the voice management rule only in a pre-arranged PoC group in the group document and stores the information in the PoC XDMS, and the session participation request message It is delivered to the client to be invited to the session. Unlike the predefined group, the Chat PoC group joins the session by dial-in method, that is, a client wishing to join the session sends a session participation request message directly to the PoC server. Group information management method cannot be used in Chat PoC group.

Therefore, the Chat PoC group can apply the group information such as group characteristics, policies, participant list, and voice management rules to the corresponding Chat PoC group session, and communicate the group information to the participants participating in the Chat PoC group. There is a problem that cannot be provided.

Accordingly, the present invention provides a method and system for delivering Chat PoC group information used in a corresponding Chat PoC session when a PoC client opens a Chat PoC session or joins an established Chat PoC session, and applies the same to a corresponding Chat PoC session. to provide.

In addition, the present invention provides a method for the PoC server to deliver the Chat PoC group information to the PoC client and apply it to the corresponding Chat PoC session when the PoC client requests the establishment of a Chat PoC group session to the PoC server, and a system for implementing the same. .

The present invention also provides a method and system that can deliver group information to be applied to an established Chat PoC session to another PoC client through a group advertisement.

In addition, the present invention provides a PoC client to establish a PoC session by interworking with the PoC XDMC (XML Document Management Client) to associate a series of group information to be applied to the corresponding Chat PoC group to the PoC XDMS with the Chat PoC group ID. It provides a method that can be stored in advance and a system for implementing the same.

In addition, the present invention, by querying the PoC XDMS the Chat PoC Group ID included in the session join request message received by the PoC server, applies the group information corresponding to the ID to the corresponding session, and applies the PoC to the group advertisement with other PoC clients. Provided is a method for including and delivering group information and a system for implementing the same.

The present invention also provides a method and system for recognizing group information applied to a Chat PoC session through a SUBSCRIBE / NOTIFY message after a PoC client other than the session initiator joins a Chat PoC session.

According to the present invention for achieving the above objects, in a method for delivering and applying Chat PoC group information in a Chat PoC (PTT over Cellular) session, a PoC terminal initiating a Chat PoC session initiation request PoC terminal corresponds to a Chat PoC group ID. Storing group information in an XDMS, transmitting a session join request message including a Chat PoC group ID to a PoC server when the Chat PoC session commencement request PoC terminal opens a Chat PoC session, and the PoC server performs the session Upon receiving the participation request message, the PoC group information stored in correspondence with the Chat PoC group ID is checked through the XML Document Management Server (XDMS), and the confirmed PoC group information is applied to the requested Chat PoC session to establish a session. And the PoC server including the checked PoC group information in a response message to the Chat PoC session initiation request PoC terminal. Characterized by including the process of delivery.

In addition, the present invention further includes the step of establishing a chat PoC session initiation request PoC terminal after the session establishment in the group advertisement message including the Chat PoC group information to deliver to the receiving PoC client through the PoC server It features.

In addition, when the receiving PoC client receives the group advertisement message, the present invention notifies the PoC user of the received group advertisement message and includes the corresponding Chat PoC group ID in the session join request message according to the PoC session join request of the user. If the PoC server receives the session participation request message from the receiving PoC client, checks whether the receiving PoC client is included in the Chat PoC group participant list, and if so. The method may further include transmitting a response message to the receiving PoC client to join the chat PoC server.

The present invention also provides a method for transmitting a PoC group information request message to a PoC server when a PoC client joining the established Chat PoC session requests PoC group information for the established Chat PoC session from a user; When the PoC server receives the group information request message, the PoC server further comprises transmitting a response message including PoC group information for the requested Chat PoC session to the PoC client requesting the group information.

The present invention also provides an XDMS for storing and managing PoC group information corresponding to a Chat PoC group ID in a system for delivering and applying Chat PoC group information in a Chat PoC (PTT over Cellular) session, and a Chat PoC group ID. Receives a Chat PoC session initiation request PoC terminal, which stores PoC group information corresponding to the XDMS and transmits a session join request message including a Chat PoC group ID to a PoC server when a Chat PoC session is established, and receives the session join request message. When the PoC group information stored in correspondence with the Chat PoC group ID is checked through the XML Document Management Server (XDMS), the confirmed PoC group information is applied to the requested Chat PoC session to establish a session, and the response message is displayed. It includes the PoC server including the confirmed PoC group information and delivers to the Chat PoC session start request PoC terminal The.

In addition, the present invention further includes the Chat PoC session commencement request PoC terminal to include in a group advertisement message optionally including Chat PoC group information after the session is established and deliver the message to the receiving PoC client through the PoC server. It features.

In addition, when the group advertisement message is received, the present invention notifies the PoC user of the received group advertisement message and includes the corresponding Chat PoC group ID in the session participation request message to the PoC server according to the user's PoC session join request. The receiving PoC client further includes: When the PoC server receives a session join request message from the receiving PoC client, the receiving PoC client is included in the Chat PoC group participant list. If there is, it sends a response message to the receiving PoC client to join the Chat PoC server.

In addition, the present invention, if the receiving PoC client joins the established Chat PoC session, if a request from the user for PoC group information for the established Chat PoC session, the PoC group information request message to the PoC And transmitting a response message including the PoC group information on the requested Chat PoC session to the PoC client requesting the group information when the PoC server receives the group information request message. do.

In addition, the present invention joins the established Chat PoC session and joins a Chat PoC session for transmitting the PoC group information request message to the PoC server when a user requests PoC group information for the established Chat PoC session. Further comprising a PoC client, and when the PoC server receives the group information request message, sending a response message including PoC group information for the requested Chat PoC session to the PoC client requesting the group information. It features.

First, a PoC system to which the present invention is applied will be described with reference to FIGS. 1 to 3. In the following, an example of applying the present invention to a PTT over Cellular (PoC) system, which provides a PTT service using a cellular mobile communication network, among the Push To Talk (PTT) systems, is an example. In general, the PoC system uses a Session Initiation Protocol (SIP) protocol and a SIP extension protocol to deliver session participation information of a group call, and uses an XML Configuration Access Protocol (XCAP) protocol to obtain group information. The functions of the present invention described below can be implemented by the above-described protocols, and the basic structure of the present invention can be based on the PoC Rel.1 system. First, a general PoC system to which the present invention can be applied will be described.

1 is a conceptual diagram of a general PoC service system and related network structure.

As shown in FIG. 1, a general PoC system may be configured to include a PoC user equipment (UE) 100, XML Document Management Servers (XDMS), and a PoC server 150. In addition, the PoC system may further include an aggregation proxy server 160. These components may be connected via an access network 110, a SIP / IP core network 120, and a remote PoC network 170.

Each of the above-described components will be described below.

The PoC terminal 100 may include a PoC client 102 and an XDMC 104.

The PoC client 102 is a service requester embedded in the PoC terminal 100 and resides in the PoC terminal 100 to perform network access for providing PoC service to a PoC service subscriber. PoC service subscriber can receive PoC service through PoC terminal in which PoC client is embedded. In the following description of the present invention, the term PoC client will be used as a generic term for a terminal having a PoC client and a PoC service subscriber. In addition, reference numerals of PoC clients will be omitted later unless otherwise specified.

The main function of the PoC client is to establish a PoC session, join an existing session that has been established, or terminate the established session at the PoC service subscriber, that is, a PoC user. The PoC client also creates and delivers talk bursts, supports instant personal alerts, and authenticates when accessing PoC services. The PoC client may be connected to the SIP / IP core network 120, which is a SIP / IP multimedia support core network, via the access network 110.

The SIP / IP core network 120 is connected to the PoC server 150, the XDMS 130, 140, and the like to support the PoC service to provide a service. At this time, the PoC server 150 may perform a Controlling PoC Function function for maintaining and managing a PoC session or a Participating PoC Function function for participating in a PoC session established for one-to-one or multi-party calls.

Meanwhile, the PoC service may be accompanied by a service for establishing a group session, such as a conference call. To this end, the OMA standard defines an XDM (XML Document Management) client 104 and an XDMS 130 and 140 for a group list service. 1 illustrates a common XDMS 130 that may be commonly used for PoC XDMS 140 and other service enablers used for PoC services. Information about the group and the group members may be stored in the XDMS (130) 140 via the PoC client. The PoC client can know the information of the PoC clients that can be called through the individual or group list received from the XDMS (130) (140). Meanwhile, creation, modification and management of groups and group members for the XDMS 130 and 140 may be performed through a communication network trusted by a PoC service provider such as the Internet or an intranet. Detailed descriptions on the protocol and details of XML document management such as creating, modifying, and removing a group list will be omitted.

Also, for the group service, the aggregation proxy server 160, when receiving the group list related request from the XDMC 104, routes it to each XDMS 130, 140 according to the appropriate rules.

Next, the PoC server 150 will be described.

2 is a schematic structural diagram of a general PoC server.

In terms of functionality, the PoC server is a Controlling PoC Function (hereinafter referred to as CF) that maintains and manages a PoC session as a whole, and a participating PoC Function (hereinafter referred to as PF) that manages maintenance between sessions. It can be divided into. Features of each PoC server will be described with reference to Tables 1 and 2 below.

Controlling PoC Function (CF) Provides centralized PoC session handling Provides the centralized Media distribution Provides the centralized Talk Burst Arbitration functionality including talker identification Provides SIP session handling, such as SIP session origination, termination, etc. Provides policy enforcement for participation in group sessions Provides the participants information Collects and provides centralized media quality information Provides centralized charging reports May provide transcoding between different codecs Support Talk Burst Control Protocol Negotiation

As shown in <Table 1>, CF manages PoC session as a whole among PoC server's functions. Particularly, CF accepts order of floor request and grants authority. The talk burst requested by the PoC client is distributed to all other PoC clients participating in the group call, and provides information on the PoC client participating in the group call.

The PF manages sessions associated with the CF and each PoC client in the PoC session, as shown in Table 2 below. In particular, the PF plays a role in relaying when the PoC client requests a voice or grants a voice to the PoC client in the CF. PF also plays a role in media relay between CF and PoC clients, transcoding if different codecs are used between them, and in the case of concurrent sessions when talking in one session, Filters one by choice.

Participating PoC Function (PF) Provides PoC session handling May provide the Media relay function between PoC Client and Controlling PoC server May provide user media adaptation procedures May provide the Talk Burst control message relay function between PoC Client and Controlling PoC server Provides SIP session handling, such as SIP session origination, termination , etc, on behalf of the represented PoC Client. Provides policy enforcement for incoming PoC session (eg access control, incoming PoC session barring, availability status, etc) May collect and provide media quality information Provides the participant charging reports May provide filtering of the media streams in the case of simultaneous sessions May provide transcoding between different codecs May support Talk Burst Control Protocol Negotiation Stores the current Answer Mode and Incoming PoC Session Barring preferences of the PoC Client

3 is a diagram schematically illustrating a Controlling PoC Function block and a Participating PoC Function block of a PoC server.

Referring to FIG. 3, each PoC clients 102-A through 102-D establish a PoC session by accessing the CF 300 through the PFs 310-A through 310-D. Thereafter, the media for the corresponding speech of the PoC client granted the speaking right from the CF 300 is delivered to each PoC clients. At this time, the PoC client granted the right to speak may make an appropriate speech only after confirming the information of the PoC clients participating in the group session.

First, the following describes a procedure for establishing a PoC multimedia session in a PoC system having the above-described features.

The transmitting PoC client sends a multimedia message (which may include various formats of audio, video, text, etc.) using the SIP protocol to request call processing. In response to the call processing request, the receiving client takes various response procedures according to the response mode setting in the corresponding PoC server and the existence of a presession. The call processing procedure for the PoC call will be described by exemplifying the procedures of the same sender network and the receiver network.

The sending PoC client sends a SIP INVITE request including the SIP address information of the receiving PoC client to which it wants to communicate to the corresponding SIP / IP core network. In this case, the SIP INVITE message may further include elements such as PoC address information of a transmitting PoC client, required media parameters, and characteristic value information indicating that the PoC service is a PoC service. Here, the "required media parameter" may include a number of characteristic values such as an encoding method, a rate, a payload type, and the like regarding audio and video when the required session is multimedia.

SIP INVITE messages are routed to a participating PoC server via a corresponding IMS server in the IMS network, i.e., P-CSPF and S-CSPF, via a route query from a Dynamic Host Configuration Protocol (DHCP) server or a Domain Name Server (DNS) server. Is passed on. In a general call request, the participating PoC server to which the PoC client is connected can be implemented separately from the controlling PoC server that manages the talk burst of the session being established, so the SIP INVITE request sent to the PF can be configured to support the SIP / IP core network of the network. It is passed to the controlling PoC server CF via.

Meanwhile, the PoC session control network including the CF transmits a SIP INVITE request message to the receiving network, and then receives a response message of the receiving network. The SIP message answered from the receiving network may be a 1xx provisional response message, a 2xx successful response message, or an error response message such as 4xx to 6xx, depending on the settings of the receiving Poc client and the PF. Can be. In the auto-answer mode, a SIP 183 'session progress' signal may be received as a response message, through which the connection between the PoC server and the client may proceed in the IMS network of the call requester. The call permission signal of the receiving PoC client is returned in SIP 183 'session progress' or SIP 200 'OK' response, and is transmitted to the PoC client via the PoC server of CF and PF. When the CF receives a 200 OK response or a 183 session progress signal from the receiving PoC server, the CF determines that the PoC call is connected and transmits a floor granted signal to the transmitting PoC client, which gives talk burst voice. According to the above response, that is, 200 OK or 183 session progress, the granting of the burst burst authority may be divided into 'confirmed' or 'unconfirmed'. In the present invention, the CF needs a buffering function when receiving an 'unconfirmed' response.

On the other hand, after receiving the response signal for the SIP INVITE request signal, the transmitting PoC client receives the floor granted signal for transmitting the talk burst transmission grant signal (for example, a ring back tone) through the RTCP protocol. The floor granted signal is generated in the CF having the talk burst arbitration authority and transmitted to the PoC client through the PF managing the corresponding PoC client. In this case, the floor granted signal may be transmitted without passing through a SIP / IP core network such as IMS since the floor granted signal uses a bearer path. After confirming the ring back tone, the PoC client transmits the media (eg, voice) stream using the Real-time Transport Protocol (RTP) protocol.

The present invention stores the Chat PoC group information to be used in the corresponding Chat PoC session in the PoC XDMS when opening a Chat PoC session between the PoC client and the PoC server in the PoC system configured as described above, and when another PoC client joins the Chat PoC session. The present invention provides a method of delivering the Chat PoC group information and applying it to a corresponding Chat PoC session.

Then, when a PoC client opens a Chat PoC session in a PoC system according to an embodiment of the present invention, a process of storing Chat PoC group information to be used in a corresponding Chat PoC session in the PoC XDMS will be described with reference to FIG. 4. Let's see. In addition, when another PoC client joins the corresponding Chat PoC session, the procedure for delivering Chat PoC group information used in the corresponding session and applying it to the corresponding Chat PoC session will be described with reference to FIG. 5. First, a description will be given of a prior technology for applying a PoC group information corresponding to a Chat PoC session which a PoC server intends to establish in conjunction with an XDMS according to a Chat PoC session establishment request with reference to FIG. 4. 4 illustrates a signal flow between a PoC XDMC and a PoC XDMS for storing and managing Chat PoC group information according to an embodiment of the present invention. At this time, the PoC XDMC is a logical entity existing in the PoC terminal together with the PoC client as shown in FIG. 1. PoC XDMC can transmit and receive information through the interface between the PoC client and the terminal.

First, PoC users can take advantage of the capabilities of PoC XDMC to create new PoC group information into XML documents. In this case, the prepared XML document includes PoC group ID such as a corresponding PoC group ID, a corresponding PoC session speaking right management rule, and a corresponding PoC group list.

In addition, in step 400 and 402, the PoC XDMC delivers an XML document written by a PoC user to an PoC XDMS through an aggregation proxy server. At this time, the XML document transmitted through the HTTP PUT message according to the embodiment of the present invention includes the Chat PoC group ID and the Chat PoC group information as described above.

Then, the PoC XDMS receiving the HTTP PUT message stores the XML document, which is the PoC group information document including the received Chat PoC group information and the Chat PoC group ID, and forwards the response message to the PoC XDMC in steps 404 and 406. do.

Meanwhile, the PoC group information document stored in the XDMS through steps 400 to 406 may be provided to the PoC terminal at the request of the XDMC. In step 408 to step 414, the XDMC includes the Chat PoC group ID corresponding to the desired Chat PoC group information in the HTTP GET message and delivers it to the PoC XDMS through the aggregation proxy server.

Then, the PoC XDMS that receives the HTTP GET message including the Chat PoC group ID as described above checks the stored Chat PoC group information corresponding to the Chat PoC group ID. Thereafter, the XDMS includes the Chat PoC group information confirmed in the response message and delivers it to the corresponding XDMC in steps 412 and 414.

5 is a signal flow diagram between a PoC terminal and a PoC server for delivering Chat PoC group information in a Chat PoC session according to an embodiment of the present invention.

First, the PoC client A who wants to open a multimedia Chat PoC session includes the Chat PoC group ID in the session participation request message (INVITE) to the PoC server A in step 500. In operation 502, the PoC server A queries the PoC XDMS A for PoC group information corresponding to the Chat PoC group ID included in the session join request message. Then, the PoC XDMS checks the stored PoC group information corresponding to the corresponding Chat PoC group ID and provides the confirmed PoC group information to the PoC server A in step 504. After that, when the PoC server receives the response message including the PoC group information provided from the PoC XDMS, in step 506, the PoC server applies the PoC group information to the corresponding Chat PoC session and responds with a 200 OK response to the PoC client A's request to open a Chat PoC session. Send a message to complete the multimedia Chat PoC session as in step 508.

On the other hand, after opening the Chat PoC session in steps 500 to 506, the PoC client A selectively selects a group advertisement message if requested by the user to inform the existence and characteristics of the corresponding Chat PoC group in the opened Chat PoC session. It can deliver to PoC clients included in the reception list. As such, the procedure of selectively transmitting the advertisement message may be performed through steps 510 to 514, and the group advertisement message transmission procedure is an optional procedure in the entire Chat PoC session opening and joining procedure.

In step 510, the PoC client transmits a group advertisement message to the PoC server A for notifying the existence and characteristics of the corresponding Chat PoC group. In this case, MBCS information may be included in the transmitted group advertisement message. In addition, the group advertisement message may include all the information of the Chat PoC group information, or may include only some information. 5 according to an embodiment of the present invention shows an embodiment including a voice management rule of the Chat PoC group information in the group advertisement message. As such, the format of the group advertisement message transmitted including the voice management rule may be illustrated in FIG. 6.

Then, referring to FIG. 6 illustrating a format of a group advertisement message according to an embodiment of the present invention, advertisement text is included in <note> and Chat PoC group name is included in <display-name>. ), And <uri> contains Chat PoC group address (Group URI), and <dialed-in> means Chat PoC Group type. In particular, in the present invention, <mbcs> includes information for notifying the voice management rule applied in the corresponding Chat PoC session mentioned in FIG. Referring to 600 of FIG. 6, it can be seen that <mbcs> includes information indicating that a speaking control rule applied in a corresponding Chat PoC session is, for example, a round-robin scheme.

In addition, the PoC server delivers the group advertisement message received in step 512 and step 514 to the PoC client included in the reception list. Then, when receiving the group advertisement message, the receiving side PoC client B includes the corresponding Chat PoC group ID in the session participation request message (INVITE) to the PoC server B in order to join the corresponding Chat PoC session in step 516. In addition, even if the group advertisement message is not received, the PoC client for joining the corresponding Chat PoC session may transmit the Chat PoC group ID to the PoC server B by including the session participation request message (INVITE).

Then, PoC server B delivers the session join request message to PoC server A, and PoC server A receiving the session join request message checks whether PoC client B is included in the corresponding Chat PoC group participant list in step 520. After checking, if it is included, the PoC client B joins the Chat PoC session by transmitting a 200 OK response message to the PoC client B in steps 520 and 522.

On the other hand, after a specific PoC client joins a Chat PoC session, the group advertisement message of step 514 may not be received or the group information contained in the group advertisement message is not stored after receiving the PoC client. If there is a request for requesting information, the PoC server can be provided by requesting group information.

If the PoC client B requests the group information by the user in step 524, the group information may be requested to the PoC server through a SUBSCRIBE message, which is a group information request message. In step 524, a procedure of acquiring information on a voice management rule among corresponding PoC group information is illustrated. When the PoC server A receives the SUBSCRIBE message from the PoC server B in step 526, the PoC server A includes the corresponding PoC group information requested by the SUBSCRIBE message in the PoC server B in the NOTIFY message which is a response message to the SUBSCRIBE message in step 528. To pass. Thereafter, the PoC server B transmits a NOTIFY message including the PoC group information to the PoC client B in step 530.

As described above, according to the present invention, when a PoC client performing an OMA PoC (PTT over Cellular) multimedia call service stores group information to be used in a Chat PoC group in advance in a PoC XDMS, the PoC multimedia session is initiated. Group information can be applied to the session. In addition, the group information is included in the group advertisement message and transmitted to the PoC client included in the reception list so that the PoC client not supporting the information included in the group information does not join the session. In addition, PoC XDMC and PoC XDMS work together to have an advantage in managing PoC group information at all times. In addition, when the PoC client joining the Chat PoC session does not receive the group advertisement or does not store the received advertisement, the PoC client can always obtain necessary group information through SUBSCRIBE / NOTIFY.

Claims (18)

In the method for delivering and applying Chat PoC group information in a Chat PoC (PTT over Cellular) session, A Chat PoC session commencement request PoC terminal storing PoC group information corresponding to a Chat PoC group ID in an XDMS; Transmitting, by the Chat PoC session commencement request PoC terminal, a session join request message including a Chat PoC group ID to a PoC server when a Chat PoC session is opened; When the PoC server receives the session join request message, the PoC server checks the stored PoC group information corresponding to the Chat PoC group ID through the XML Document Management Server (XDMS), and then checks the confirmed PoC group information in the Chat PoC session. To open a session, And transmitting the chat PoC group information to the Chat PoC session initiation request PoC terminal by including the confirmed PoC group information in a response message. The method of claim 1, wherein the storing of the PoC group information in an XDMS includes: An XML Document Management Client (XDMC) in the Chat PoC session initiation request PoC terminal including the Chat PoC group ID and the PoC group information in an HTTP PUT message to the XDMS through an aggregation proxy server; The XDMS stores the PoC group information corresponding to the Chat PoC group ID and the Chat PoC group ID when the HTTP PUT message is received, and sends a response message to the XDMC. Method for delivering and applying group information. The Chat PoC according to any one of claims 1 to 3, wherein the PoC group information corresponding to the Chat PoC group ID is written in an XML document format, and the created XML document is transmitted in an HTTP PUT message. Method for delivering and applying group information. The method of claim 2, An XML Document Management Client (XDMC) in the Chat PoC session initiation request PoC terminal includes a Chat PoC group ID corresponding to Chat PoC group information requested by a user in an HTTP GET message and delivers it to the XDMS through an aggregation proxy server. Process, When the XDMS receives the HTTP GET message, the XDMS checks the stored PoC group information corresponding to the Chat PoC group ID, and includes the confirmed PoC group information in the response message and forwarding to the XDMC Method for delivering and applying the Chat PoC group information, characterized in that. The method of claim 1, After the session is established, the Chat PoC session commencement request PoC terminal further includes the step of selectively included in the group advertisement message including the Chat PoC group information and delivers to the receiving PoC client through the PoC server. Method for delivering and applying PoC group information. The method of claim 5, When the receiving PoC client receives the group advertisement message, the PoC server notifies the PoC user of the received group advertisement message and includes the Chat PoC group ID in the session participation request message according to the PoC session join request of the user. Transfer to, When the PoC server receives the session join request message from the receiving PoC client, the PoC server checks whether the receiving PoC client is included in the Chat PoC group participant list, and if so, transmits a response message to the receiving PoC client. The Chat PoC group information delivery and application further comprising the step of joining the Chat PoC server. The method according to any one of claims 1 to 6, When the PoC client joining the established Chat PoC session requests PoC group information for the established Chat PoC session from a user, transmitting the PoC group information request message to the PoC server; And when the PoC server receives the group information request message, sending a response message including PoC group information for the requested Chat PoC session to the PoC client requesting the group information. Method for delivering and applying group information. The method of claim 1, wherein the PoC group information is information including at least one of a group characteristic and a policy, a list of participants, and a right management rule. In the system for the delivery and application of Chat PoC group information in a Chat PoC (PTT over Cellular) session, XDMS for storing and managing PoC group information corresponding to Chat PoC group ID, A Chat PoC session initiation request PoC terminal that stores PoC group information corresponding to a Chat PoC group ID in an XDMS, and transmits a session join request message including a Chat PoC group ID to a PoC server when a Chat PoC session is established; When receiving the session participation request message, the PoC group information stored in correspondence with the Chat PoC group ID is checked through the XML Document Management Server (XDMS), and the confirmed PoC group information is applied to the chat PoC session that has been requested to open. And the PoC server which includes the confirmed PoC group information in a response message and delivers the PoC group to the Chat PoC session initiation request PoC terminal. The method of claim 9, wherein the Chat PoC session start request PoC terminal, In order to store the PoC group information in the XDMS, an XDMC (XML Document Management Client) including Chat PoC group ID and PoC group information in an HTTP PUT message and delivering the PoC group information to the XDMS through an aggregation proxy server. System for implementing Chat PoC group information delivery and application. The method of claim 10, wherein the XDMS, When the HTTP PUT message is received, the Chat PoC group information and the PoC group information corresponding to the Chat PoC group ID are stored, and the Chat PoC group information delivery and application is implemented, wherein the response message is transmitted to the XDMC. System. 12. The Chat PoC group according to any one of claims 9 to 11, wherein the PoC group information corresponding to the Chat PoC group ID is written in an XML document format, and the created XML document is transmitted in an HTTP PUT message. System for implementing information delivery and application. The aggregation proxy server of claim 12, wherein the XDMC stores the PoC group information in an XDMS, and if there is a request to confirm Chat PoC group information by a user, includes the Chat PoC group ID in an HTTP GET message. To the XDMS via The XDMS checks the stored PoC group information corresponding to the Chat PoC group ID when the HTTP GET message is received, and includes the checked PoC group information in a response message and transmits the information to the XDMC. System for implementing Chat PoC group information delivery and application. 10. The method of claim 9, The Chat PoC session start request PoC terminal, Chat PoC group information delivery and application, characterized in that it further comprises including in the group advertisement message including the Chat PoC group information after the session establishment to deliver to the receiving PoC client through the PoC server. system. The method of claim 14, When the group advertisement message is received, the receiving side notifies the PoC user of the received group advertisement message and includes the corresponding Chat PoC group ID in the session participation request message to the PoC server according to the user's PoC session join request. Further includes a PoC client, When the PoC server receives a session join request message from the receiving PoC client, the PoC server checks whether the receiving PoC client is included in the Chat PoC group participant list, and if so, transmits a response message to the receiving PoC client. Joining the Chat PoC server system for implementing Chat PoC group information delivery and application. The PoC group information request message as claimed in claim 15, wherein, after the receiving PoC client joins the established Chat PoC session, the user receives a request for PoC group information for the established Chat PoC session. To the PoC server, And when the PoC server receives the group information request message, sending a response message including PoC group information about the requested Chat PoC session to the PoC client requesting the group information. System for implementing delivery and application. The method of claim 9, Joining the established Chat PoC session, if the PoC group information for the established Chat PoC session is requested from the user, further comprising a PoC client to join the Chat PoC session for transmitting the PoC group information request message to the PoC server and, And when the PoC server receives the group information request message, sending a response message including PoC group information about the requested Chat PoC session to the PoC client requesting the group information. System for implementing delivery and application. 10. The system of claim 9, wherein the PoC group information is information including at least one of a group characteristic and a policy, a list of participants, and a voice management rule.

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