KR100592592B1 - Method of Exchanging State Information of Participant between Different kinds of Conference Systems - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a method for exchanging participant status information between heterogeneous conference systems.

2. The technical problem to be solved by the invention

The present invention transmits participant status information in which one conference server joins or leaves a conference to another conference server through a conference policy server so that all participants connected to each conference server can receive participant status information in real time.

3. Summary of Solution to Invention

The present invention provides a method for exchanging participant state information in a heterogeneous conference system including a SIP-based conference server, a policy server, a media server, and an H.323-based conference server. Transmitting a change information of a participant to the policy server and the media server, respectively; The media server connecting a media session with the SIP terminal of the new participant according to the change information of the SIP-based conference participant; Transmitting, by the policy server, change information of the SIP-based conference participant to the H.323-based conference server; Transmitting, by the H.323-based conference server, change information of the SIP-based conference participant to the media server; And a fifth step of the media server transferring information of the SIP-based conference participant to all H.323 terminals participating in the H.323-based conference.

4. Important uses of the invention

The invention is used in conference systems and the like.

Connection setup protocol, SIP, H.323, status information, conference

Description

Method of Exchanging State Information of Participant between Different kinds of Conference Systems}

1 is a configuration diagram of an embodiment of a conventional SIP-based conference system.

2 is a diagram illustrating an embodiment of a conventional H.323 based conference system.

3 is a diagram illustrating an embodiment of a heterogeneous conference system to which the present invention is applied.

4 is a flow diagram of an embodiment of a process of delivering participant information to a H.323 terminal of a SIP-based conference system according to the present invention;

5 is a flowchart illustrating a process of delivering participant information to a SIP terminal of an H.323 based conference system according to the present invention;

FIG. 6 is a flow diagram of an embodiment of a process for delivering the leaver information of the SIP-based conference system according to the present invention to the H.323 terminal. FIG.

7 is a flow diagram of an embodiment of a process for delivering the withdrawal information of a H.323 based conference system to a SIP terminal according to the present invention;

* Explanation of symbols for the main parts of the drawings

301: SIP terminal 302: SIP-based conference server

303: H.323 terminal 304: H.323 based conference server

305: signaling gateway server 306: conference policy server

307: media server

The present invention relates to a method for exchanging participant status information between heterogeneous conference systems, and more particularly, to transfer the participant status information of one conference server to or from another conference server to another conference server through a conference policy server. The present invention relates to a method for exchanging participant status information between heterogeneous conference systems to allow all connected participants to receive participant status information in real time.

In the following embodiment of the present invention, a conference system using a connection establishment protocol (SIP) and a conference system using an H.323 communication protocol will be described as an example of a heterogeneous conference system.

In general, a connection establishment protocol (SIP) or an H.323 communication protocol is used to provide a connection establishment and deletion function between a user and a conference server when developing a conference service in an Internet environment.

The Session Initiation Protocol (SIP) is a very simple text-based application layer control protocol that allows one or more participants to create, modify and terminate a session together. Such sessions include teleconferences, telephone calls, visits, event notifications, instant messaging, and the like, via the Internet. SIP is independent of the underlying packet protocols (eg TCP, UDP, ATM, X.25).

On the other hand, SIP is an Internet Engineering Task Force (IETF) standard, which is a text-based Internet standard, Simple Mail Transfer Protocol (SMPT) and HyperText Transfer Protocol (HTTP). It was designed afterwards. Since SIP follows the text-based Internet standards, troubleshooting and network debugging are easy. SIP is based on a client / server architecture where clients initiate a call and the server responds to the call.

1 is a diagram illustrating an embodiment of a conventional SIP-based conference system.

As shown in FIG. 1, a conventional SIP based conference system includes a SIP terminal 101, a SIP based conference server 103, and a media server 204.

Looking at the operation of each component, the user uses a conference service using the SIP terminal 101, for this purpose, the SIP terminal 101 provides a menu of services such as participation, withdrawal, viewing information of the participants in the conference to provide. The SIP terminal 101 is connected to a SIP-based conference server 103 through the Internet 102, and the SIP-based conference server 103 is connected to a plurality of SIP terminals 101 to conduct a conference. Support connection establishment.

When the SIP-based conference server 103 delivers the information of the SIP terminal 101 connected to the media server 104, the media server 104 opens a media session to open another SIP terminal connected thereto. To exchange audio and video information

On the other hand, the H.323 protocol stack (hereinafter referred to as 'H.323') is a packet-switched network such as TCP (Transport Control Protocol) / Internet Protocol (IP) for transmitting multimedia video conferencing data. In order to transmit through the, it is a standard adopted by the International Telecommunication Union-Telecommunication Standardization Sector (ITU-T). This includes the LAN standard for high quality video and the Internet standard for transmitting low frequency video over slow lines as high as 28.8 Kbps.

2 is a diagram illustrating an embodiment of a conventional H.323 based conference system.

As shown in FIG. 2, a conventional H.323 based conference system includes an H.323 terminal 201, an H.323 based conference server 203, and a media server 204.

Looking at the operation of each of the components, the user uses a conference service using the H.323 terminal 201, for this purpose, the H.323 terminal 201 is a participant in the conference, withdrawal, viewing information, etc. To provide a service menu. The H.323 terminal 201 is connected to an H.323 based conference server (MCU) 203 via the Internet 202, and the H.323 based conference server 203 is connected to a plurality of H.323 terminals 201. Supports connection setup for the conference to proceed.

When the H.323 based conference server 203 delivers the information of the H.323 terminal 201 connected to the media server 204, the media server 204 opens a media session. It supports the exchange of audio and video information with other connected H.323 terminals.

However, the conventional conference service has a disadvantage in that the conference can be used only with users registered with the service provider registered by the user, and the conference cannot be used with users registered with other service providers.

In addition, the conventional conference service provides a different conference service according to the SIP or H.323 communication protocol used by the service provider in developing the conference system. Therefore, there is a problem in that the conference service is restricted from providing a global conference service.

The present invention has been proposed in order to solve the above problem, and the participant status information of one conference server joining or leaving the conference is transmitted to the other conference server through the conference policy server, so that all participants connected to each conference server are participants in real time. The purpose of the present invention is to provide a method for exchanging participant status information between heterogeneous conference systems for receiving status information.

In order to achieve the above object, the present invention provides a method for exchanging participant status information in a heterogeneous conference system including a SIP-based conference server, a policy server, a media server, and an H.323-based conference server. A first step of transmitting conference participants' change information to the policy server and the media server, respectively, when the participants access; The media server connecting a media session with the SIP terminal of the new participant according to the change information of the SIP-based conference participant; Transmitting, by the policy server, change information of the SIP-based conference participant to the H.323-based conference server; Transmitting, by the H.323-based conference server, change information of the SIP-based conference participant to the media server; And a fifth step of the media server transferring the information of the SIP-based conference participant to all the H.323 terminals participating in the H.323-based conference.
The present invention also provides a method for exchanging participant status information in a heterogeneous conference system including a SIP-based conference server, a policy server, a media server, and an H.323-based conference server. Transmitting a conference participant's change information to the policy server and the media server, respectively, when a conference participant accesses a new participant; Transmitting, by the policy server, change information of the H.323-based conference participant to the SIP-based conference server; And transmitting, by the SIP-based conference server, a notification message including the information of the H.323-based conference participant to all SIP terminals participating in the SIP-based conference.

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The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a diagram illustrating an embodiment of a heterogeneous conference system to which the present invention is applied.

As shown in FIG. 3, the heterogeneous conference system includes a SIP terminal 301, a SIP-based conference server 302, an H.323 terminal 303, an H.323-based conference server 304, a signaling gateway server 305. , Conference policy server 306 and media server 307.

Looking at the configuration and operation of each component in detail as follows.

The SIP-based conference server 302 supports the function of establishing and terminating the connection with the SIP terminal 301 used by each conference participant, and transfers the participant status information to the conference policy server 306 accordingly. The participant state information participating in the 323-based conference server 304 is received and transmitted to each SIP terminal 301 currently connected.

Meanwhile, the H.323 based conference server 304 supports a function of establishing and terminating a connection with the H.323 terminal 303 used by each conference participant, and provides the participant status information according to the conference policy server 306. ), And receives the participant status information participating in the SIP-based conference server 302.

Meanwhile, the signaling gateway server 305 converts the SIP connection message delivered by the SIP-based conference server 302 into an H.323 message and delivers the H.323-based conference server 304 to the H.323-based conference server 304. It converts the H.323 connection message delivered by the base conference server 304 into a SIP message and delivers it to the SIP-based conference server 302.

Meanwhile, the conference policy server 306 supports a function of storing and deleting participant status information participating in a conference, and newly joining participant information from the SIP-based conference server 302 and the H.323-based conference server 304. And when receiving the withdrawal information of the withdrawal, it provides a function of mutual transfer to the H.323-based conference server 304 and the SIP-based conference server 302.

Meanwhile, the media server 307 transmits audio and video data between the SIP terminal 301 and the H.323 terminal 303 connected to the SIP based conference server 302 and the H.323 based conference server 304. It supports the function of establishing and terminating a media session, and receives the participant status information of the SIP terminal 301 from the H.323-based conference server 304 and delivers it to the H.323 terminal 303.

For example, a user who registers a first user, a second user, and a third user to the SIP-based conference server 302, and a fourth user, a fifth user, and a sixth user to the H.323-based conference server 304. Assume that you are a registered user. The registration information of each user is considered as shown in [Table 1].

Terminal (user) Location information of registered user  SIP-based conference server 1st SIP terminal sip: user1@sip.etri.re.kr 2nd SIP terminal sip: user2@sip.etri.re.kr 3rd SIP terminal sip: user3@sip.etri.re.kr  H.323-based conference server Fourth H.323 terminal user4@h323.etri.re.kr Fifth H.323 terminal user5@h323.etri.re.kr 6th H.323 terminal user6@h323.etri.re.kr

At this time, the location address of the SIP-based conference server 302 is sip: conf@sip.etri.re.kr, the location address of the H.323-based conference server 304 is conf@h323.etri.re.kr For further information, conference information to be considered is considered conference@etri.re.kr.

When the SIP-based conference server 302 delivers the SIP participant status information to the conference policy server 306 and the conference policy server 306 delivers the SIP participant status information to the H.323-based conference server 304. The function (participant status information) used in the case is defined as follows.

NewSIPUserJoin (conferenceID, userID)

SIPUserLeave (conferenceID, userID)

Here, "conferenceID" is conference specific information to join, and "userID" is SIP participant information newly participating in a SIP-based conference.

When the H.323-based conference server 304 delivers H.323 participant status information to the conference policy server 306, and the conference policy server 306 sends the H.323 participant status information to the SIP-based conference server 302. The function (participant status information) used when passing to) is defined as follows.

NewH323UserJoin (conferenceID, userID)

H323UserLeave (conferenceID, userID)

Here, "conferenceID" is conference specific information to join, and "userID" is H.323 participant information newly participating in an H.323 based conference.

4 is a flowchart illustrating a process of delivering participant information to an H.323 terminal in a SIP-based conference system according to the present invention.

First, when the first SIP terminal transfers a SIP message called INVITE to connect to the SIP-based conference server 302 (401), the SIP-based conference server 302 sends a 200 OK response message allowing the connection. Is transmitted to the first SIP terminal (402) to establish a connection.

INVITE sip: conf@sip.etri.re.kr SIP 1.0

From: sip: user1Wsip.etri.re.kr

To: sip: conf@sip.etri.re.kr

200 OK user1@sip.etri.re.kr SIP 1.0

From: sip: conf@sip.etri.re.kr

To: sip: user1Wsip.etri.re.kr

Here, the SIP-based conference server 302 notifies all terminals connected to it through a Notify message that the first SIP terminal is connected.

Thereafter, the first SIP terminal transmits a registration message to the SIP-based conference server 302 (403).

Subscribe sip: conf@sip.etri.re.kr SIP 1.0

From: sip: user1Wsip.etri.re.kr

To: sip: conf@sip.etri.re.kr

Thereafter, the SIP-based conference server 302 delivers the following participant information to the conference policy server 306 (404) and the participant information to the media server 307 (405) so that the media session is connected. do.

NewSIPUserJoin (conference@etri.re.kr, sip: user1@sip.etri.re.kr);

Thereafter, the conference policy server 306 forwards the participant information to the H.323 based conference server 304 (406).

Thereafter, the H.323 based conference server 304 transmits the participant information to the media server 307 (407).

Then, the media server 307 uses a real-time transport protocol (RTP) / real-time transport control protocol (RTCP) to all connected H.323 terminals 303. Forward the message (408).

The SIP-based conference server 302 and the H.323-based conference server 304 may exchange participant information in real time by repeating the process each time a new participant joins.

5 is a flowchart illustrating a process of delivering participant information to a SIP terminal of an H.323 based conference system according to the present invention.

First, a fourth H.323 terminal sends a setup message (conference@h323.etri.re.kr, user4@h323.etri.re.kr) to establish a connection to the H.323 based conference server 304. If delivered (501), the H.323-based conference server 304 delivers a connection message (conference@h323.etri.re.kr, user4@h323.etri.re.kr) to allow the connection A connection is established (502).

Thereafter, after the connection establishment of the fourth H.323 terminal, the H.323-based conference server 304 delivers the following participant information to the conference policy server 306 (503).

NewH323UserJoin (conference@etri.re.kr, user4@h323.etri.re.kr);

In addition, the H.323 based conference server 304 transmits the participant information to the media server 307 (504).

Thereafter, the conference policy server 306 transmits the participant information to the SIP-based conference server 302 (505).

Then, the SIP-based conference server 302 notifies to all connected SIP terminals 301 that the fourth H.323 terminal (user4@h323.etri.re.kr) newly joined (Notify) message. Pass 506. For example, a Notify message delivered to the first SIP terminal is as follows.

Notify sip: user1@sip.etri.re.kr SIP 1.0

From: sip: conf@sip.etri.re.kr

To: sip: user1@sip.etri.re.kr

Body

<user> user4@h323.etri.re.kr </ user>

The SIP-based conference server 302 and the H.323-based conference server 304 may exchange participant information in real time by repeating the process each time a new participant joins.

FIG. 6 is a flowchart illustrating an example of a process of delivering the leaver information of the SIP-based conference system according to the present invention to the H.323 terminal.

First, the first SIP terminal delivers the following By message to the SIP-based conference server 302 in order to leave the conference (601).

BYE sip: conference @ etri.re.kr SIP 1.0

From: sip: conf@sip.etri.re.kr

To: sip: user1@sip.etri.re.kr

Here, the SIP-based conference server 302 notifies all terminals connected to it through a Notify message that the first SIP terminal has left.

Thereafter, the SIP-based conference server 302 delivers the following opt-out information to the media server 307 to terminate the media session between the first SIP terminal and the media server 307.

SIPUserLeave (conference@etri.re.kr, sip: user1@sip.etri.re.kr);

In addition, the SIP-based conference server 302 delivers the withdrawal information to the conference policy server 306 (603).

Thereafter, the conference policy server 306 forwards the withdrawal information to the H.323 based conference server 304 (604).

Thereafter, the H.323 based conference server 304 transmits the participant information to the media server 307 (605), and the media server 307 sends the information to all H.323 terminals connected through the media session. Informer 606 that the participant of the first SIP terminal has withdrawn.

The SIP-based conference server 302 and the H.323-based conference server 304 may exchange the participant information in real time by repeating the process each time a participant withdraws.

7 is a flowchart illustrating an example of a process of delivering the leaver information of the H.323 based conference system according to the present invention to the SIP terminal.

First, the fourth H.323 terminal delivers a disconnect message to the H.323 based conference server 304 to leave the conference (701).

The H.323 based conference server 304 then delivers the next withdrawal information to the media server 307 to terminate the media session.

H323UserLeave (conf@h323.etri.re.kr, user4@h323.etri.re.kr);

In addition, the H.323 based conference server 304 transmits the withdrawal information to the conference policy server 306 (703).

Thereafter, the conference policy server 306 forwards the opt-out information to the SIP-based conference server 302 (704).

Subsequently, the SIP-based conference server 302 transmits a Notify message to all connected SIP terminals 301 (705) to inform that the fourth H.323 terminal has left.

Notify sip: user2@sip.etri.re.kr SIP 1.0

From: sip: conf@sip.etri.re.kr

To: sip: user2@sip.etri.re.kr

Body

     <conference-info>

     <user> user4@h323.etri.re.kr </ user>

      <status> departed </ status>

      </ conference-info>

The SIP-based conference server 302 and the H.323-based conference server 304 may exchange the participant information in real time by repeating the process each time a participant withdraws.

As described above, the method of the present invention may be implemented as a program and stored in a recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.) in a computer-readable form. Since this process can be easily implemented by those skilled in the art will not be described in more detail.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the art without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

In the present invention as described above, even if each conference server uses a different communication protocol, the conference status information of one conference server joining or leaving the conference is transmitted to the other conference server through the conference policy server, thereby independent of each conference server. As a result, all participants connected to the system can receive the participant status information in real time.

In addition, the present invention has the effect of activating a conference service between heterogeneous conference servers using different communication protocols in addition to the conference service currently used only by local users.

Claims (4)

delete A method for exchanging participant status information in a heterogeneous conference system including a SIP-based conference server, a policy server, a media server, and an H.323-based conference server, A first step of transmitting, by the SIP-based conference server, new conference participants to the policy server and the media server, respectively; The media server connecting a media session with the SIP terminal of the new participant according to the change information of the SIP-based conference participant; Transmitting, by the policy server, change information of the SIP-based conference participant to the H.323-based conference server; Transmitting, by the H.323-based conference server, change information of the SIP-based conference participant to the media server; And And a fifth step of the media server transferring the information of the SIP-based conference participants to all the H.323 terminals participating in the H.323-based conference. A method for exchanging participant status information in a heterogeneous conference system including a SIP-based conference server, a policy server, a media server, and an H.323-based conference server, Transmitting, by the H.323-based conference server, new conference participants to the conference server, the change information of the conference participants to the policy server and the media server, respectively; Transmitting, by the policy server, change information of the H.323-based conference participant to the SIP-based conference server; And And a third step in which the SIP-based conference server delivers a notification message including information of the H.323-based conference participant to all SIP terminals participating in the SIP-based conference. Information exchange method. delete

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