KR20000046891A - Method for searching user information of video conference system - Google Patents

Abstract

PURPOSE: A method for searching user information of a video conference system is provided to record video conference terminal information of every user in a gate keeper in order to search all terminal information. CONSTITUTION: A method for searching user information of a video conference system includes a first thru a third steps. At the first step(S2), GVCS(Group Video Conference System) manager registers RRQ(Registration Request) in a gate keeper server, and the gate keeper server checks user registration. At the second step, the GVCS manager is initiated(S4) when the gate keeper server transmits RRJ(Registration Reject), user information is selected(S5) when the gate keeper server transmits RCF(Registration Confirm). At the third step, call is connected to partner's IP(Internet Protocol) address(S7), or to an ISDN(Integrated Services Digital Network) number(S8), or to the telephone number(S9).

Description

How to Retrieve User Information from Video Conference System

The present invention relates to a technology for supporting a call connection procedure in all models of video conferencing system using a specific message, and registers a RAS message to a gatekeeper using a local area network in a group video conferencing system (GVCS) manager. The present invention relates to a method for retrieving user information of a videoconferencing system that facilitates retrieval or call connection.

Group Video Conference System (GVCS) refers to a system that supports video and voice communication to enable remote meetings between groups of people. This GVCS requires high quality audio and video support. .

To meet these requirements, high-definition TV monitors, high-end camera devices, high-sensitivity microphones and speakers are required. As a communication network, multiple dedicated lines or B-ISDN lines of 384 kbps or more must be bundled to ensure fast network use.

Looking at a specific use example to satisfy the above requirements are as follows.

First, H.324 (GSTN / PSTN) as shown in FIG. 1 can support video conferencing using a regular telephone line and a modem that guarantees a speed of up to 56kbps. However, such a system may be said to be suitable for a simple video conferencing environment using existing modems and telephone lines, rather than for implementing high quality GVCS.

As shown in FIG. 2, H.320 (ISDN) uses high-speed communication of 64 kbps, up to 64 kbps, 128 kbps, 384 kbps, etc. using an ISDN network, which ensures excellent network resources for GVCS.

H.323 (LAN) as shown in Figure 3 supports video conferencing of at least several kbps and up to several Mbps on the Internet or intranet. However, the LAN network has a drawback that the quality of the video conference call may be affected when the network usage increases during the video conference considering the characteristics of sharing a limited network resource among multiple users.

However, the H.323 has an advantage that a variety of existing LAN communication programs can be used. For example, it is possible to find a user who is pre-registered with a gatekeeper server to start a video conference or to easily use a web browser to schedule and search a video conference.

As a result, it is most desirable to select an H.320 (ISDN) model that can safely use high-speed communication in order to guarantee good quality GVCS among the three video conference system models.

However, in the videoconferencing system of the related art, the videoconferencing terminal information cannot be used, which makes it difficult to search for user information or connect to a call.

Therefore, the technical problem to be achieved by the present invention is to enable the retrieval of all video conferencing terminal information currently available by registering the terminal information of its own conference with the gatekeeper using the H.225.0 RAS message in the preprocessing step for call connection. A method of retrieving user information of a video conference system is provided.

1 is a block diagram of an ITU-T H.324 videoconferencing system according to the prior art;

2 is a block diagram of an ITU-T H.320 videoconferencing system according to the prior art;

3 is a block diagram of an ITU-T H.323 video conferencing system according to the prior art;

4 is a block diagram of a GVCS to which a user information retrieval method according to the present invention is applied;

5 is a conceptual diagram of transmission between a gatekeeper server and a GBS according to the present invention.

Figure 6 is a state table of the RAS message applied to the present invention.

7 is an H.225.0 message syntax applied to the present invention.

8 is a diagram illustrating a GVCS registration / call connection procedure according to the present invention.

9 is a signal flowchart of a user information retrieval method of a videoconferencing system according to the present invention;

*** Description of the symbols for the main parts of the drawings ***

400: GBS 401: H.323 terminal

402: H.320 terminal 403: H.324 terminal

404: GCS Manager 405: Gatekeeper Server

406: Exclusive PC from JI

In order to achieve the object of the present invention, a method for retrieving user information of a videoconferencing system includes a first process in which a GBS manager registers an RRQ in a H.225.0 RAS message to a gatekeeper server, and the gatekeeper server checks user registration. ; When the gatekeeper server transmits the RRJ, the GBS manager returns to the initial state and selects user information desired by the user when transmitting the RCF; GV CS manager selects one of the H.323, H.320, and H.324 video conferencing procedures and performs the call connection process based on the selection result and the call connection process using the other party's ISDN number. Or performing a call connection process to the other party's telephone number; After the call connection is completed, the fourth process of transmitting and ending the video signal and the audio signal during the conference.

4 is an overall block diagram of GVCS (GVCS) to which the user information retrieval method of the videoconferencing system according to the present invention is applied. As shown in FIG. 4, H.323 terminals 401 and H are connected to GVS 400. .320 terminal 402, H.324 terminal 403 and GBS manager 404, each of which terminal 401, 402, 403 is ISDN interface 401A, GSTN interface 402A Is connected to the ISDN network, the GSTN network, and the LAN network through the LAN interface 403A, and the GBS manager 404 sends the H.225.0 RAS message to the gatekeeper server 405 through the LAN interface 403A. Registered, the dedicated PC 406 is configured to receive a GVCS user through a web browser or other video conferencing information from the gatekeeper server 405, and to configure the operation of the present invention Detailed description with reference to the accompanying Figures 5 to 9 Is as follows.

First, the GVCS 400 includes all three types of video conferencing systems of H.320, H.324, and H.323, and each model has a dedicated interface. That is, the H.320 terminal 401 has an ISDN interface 401A, the H.324 terminal 402 has a GSTN interface 402A, and the H.323 terminal 403 has a LAN interface 403. Equipped. Each model, of course, follows its own ITU-T call connection procedure.

The GBS manager 404 registers the H.225.0 RAS message to the gatekeeper server 405 through the LAN interface 403A as a preprocessing procedure before the call connection procedure of each model.

The dedicated PC 406 in JB may search for a GVCS user through a web browser or the like and receive other video conference information from the gatekeeper server 405. The gatekeeper server 405 manages all information of the terminals 401, 402, and 403, and provides a search function through the LAN interface 403A.

Meanwhile, referring to FIG. 9, the user information retrieval process will be described below.

The GBS manager 404 registers a RRQ (Registration Request) with the gatekeeper server 405 in the H.225.0 RAS message, and the gatekeeper server 405 checks the user registration (S1, S2).

When the gatekeeper server 405 transmits a RRJ (RRJ: Registration Reject), the GCS manager 404 returns to an initial state, and when the gatekeeper server 405 transmits a registration confirmation (RCF), the user selects desired user information. (S3-S5)

Thereafter, the GCS manager 404 selects a video conference procedure of one of H.323, H.320, and H.324. At this time, if H.323 is selected, the call is connected to the other party's IP address. If H.320 is selected, the call is connected to the other party's ISDN number. If H.324 is selected, the call is connected to the other party's telephone number. Perform the connection process (S6-S9).

In this way, when the call connection is completed, the video signal and the audio signal input through the microphone are transmitted and received during the video conference.

On the other hand, Figure 5 shows another embodiment of the present invention will be described as follows.

The first GCS 501 registers the RRQ in the H.225.0 RAS message to the gatekeeper server 500, and similarly, the second GCS 502 also registers the RRQ to the gatekeeper server 500. The gatekeeper server 500 transmits the RCF to each of the GBSs 501 and 502.

Accordingly, each of the GBSs 501 and 502 can start the call connection process after retrieving the desired information from the gatekeeper server 500.

6 illustrates an H.225.0 RAS message, and FIG. 7 illustrates syntax of a message for transmitting GVCS terminal information. Terminal information used in the present invention is as follows.

The GVCS call connection process according to the present invention is as follows.

As described in detail above, the present invention allows all of the H.323, H.320, H.324 system to be selectively used according to the situation in GV CS, and the call connection procedure using the H.225.0 RAS message The video conferencing system information is registered in advance in the gatekeeper server to obtain a desired user's telephone number, ISDN number, IP address, etc., thereby making the call connection procedure very convenient. For example, you can know in advance whether GV CS is ready for the call connection process and how many participants are involved. Also, the information about audio and video devices can be retrieved through the gatekeeper server. can do.

Claims (1)

A first step in which the GB manager registers the RRQ in the H.225.0 RAS message to the gatekeeper server, and the gatekeeper server checks the user registration; When the gatekeeper server transmits the RRJ, the GBS manager returns to the initial state and selects user information desired by the user when transmitting the RCF; GV CS manager selects one of the H.323, H.320, and H.324 video conferencing procedures and performs the call connection process based on the selection result and the call connection process using the other party's ISDN number. Or a third process of performing a call connection process to the other party's telephone number.