KR100706920B1 - Method for providing the integrated video conference service in different networks - Google Patents

Abstract

The present invention relates to a video call service providing method, and if a group meeting is requested from one terminal so that a group meeting can be established between a terminal belonging to an H.324M network, a terminal belonging to an H.323 network, and a terminal belonging to a SIP network. It provides a method of providing a group conference service in a heterogeneous video communication network, which provides a group conference service to a terminal belonging to a heterogeneous video communication network by calling a participating terminal in an IP multimedia subsystem (IMS) to participate in a group conference. For example, a video call between an H.324M terminal based on a mobile communication network (wireless internet network), an H.323 terminal and a SIP terminal based on a wired internet network, and a different video communication protocol are implemented. Heterogeneous video communication networks by defining specifications for signaling between heterogeneous video networks The effect of optimizing group conferencing between H.324M terminals, H.323 terminals, and SIP terminals, respectively, and the signaling procedure for group conferencing between heterogeneous video communication networks can be simplified, thereby simplifying subscriber use of the group conferencing service. In particular, the simple signaling procedure can reduce the group conference service fee.

Heterogeneous Network, Video Communications, H.324M, H.323, SIP, Group Conferencing

Description

How to provide group conferencing service in heterogeneous video communication networks {Method for providing the integrated video conference service in different networks}

1 is a configuration diagram of an embodiment of a heterogeneous video communication network to which the present invention is applied.

2A to 2C are flowcharts illustrating an embodiment of a process for generating a group conference in a heterogeneous video communication network according to the present invention.

3A to 3C are flowcharts illustrating an embodiment of a process for joining a group conference in a heterogeneous video communication network according to the present invention.

4A through 4C are flowcharts illustrating one embodiment of a process of leaving a group conference in a heterogeneous video communication network according to the present invention.

* Explanation of symbols on the main parts of the drawing

10: H.324M terminal

11: Mobile Switching Center (MSC)

20: H.323 terminal

21: Gatekeeper (G / K; GateKeeper)

30: SIP terminal

31: SIP server

40: Inter-working Media Gateway (IMG)

50: Multimedia Session Control System (MSS)

60: application server (AS)

70: Multimedia Resource Controller (MRC)

The present invention relates to a method for providing a video call service, and more particularly, to allow a group conference between a terminal belonging to an H.324M network, a terminal belonging to an H.323 network, and a terminal belonging to a SIP network. The present invention relates to a method for providing a group conference service in a heterogeneous video communication network, in which an IP multimedia subsystem (IMS) calls a participant terminal to participate in a group conference and provides a group conference service to a terminal belonging to a heterogeneous video communication network. .

In the conventional voice communication service in the mobile communication network (PLMN) and the public telephone network (PSTN), the image of the wired / wireless Internet network (IP network or packet data network), which has recently been in the spotlight, is compared to the simple communication between users by voice. Call services (eg, group conferencing, video calls, instant messaging, etc.) allow users to make voice calls while looking at each other's faces.

The video call service in the wired / wireless Internet network is based on Session Initiation Protocol (SIP) or H.323 protocol or H.324M protocol. SIP is a VOIP Protocol established by the Internet Engineering Task Force (IETF) -MMUSIC WG, H.323 is a VOIP Protocol established by the International Telecommunication Union (ITU), and H.324M is a mobile communication network, especially It is an extension of the asynchronous WCDMA network and is a VOIP protocol established by the ITU.

In general, people can only make video call service between users who have subscribed to the same video call service provider, which adopts either SIP or H.323 or H.324M networks. Because to build. Accordingly, in order to receive a video call service, a subscriber only supports terminals of each video communication network, that is, between other subscribers having the same protocol support terminal through any one of a SIP terminal, an H.323 terminal, or an H.324M terminal. You can make a video call.

As described above, interworking technology between heterogeneous video communication networks has been developed so that video call service can be performed between terminals belonging to heterogeneous video communication networks. For example, Korean Patent No. 488258 ("Invention: Video telephony interworking method between WCDMA network and CDMA2000 1X EV-DO network") includes an H.324M terminal belonging to an asynchronous circuit type WCDMA network and a synchronous packet type method. It is disclosed to provide a video call service between H.323 terminals belonging to a CDMA2000 1X EV-DO network.

However, in the above conventional technology, only a video call service is available between an H.323 terminal and an H.324M terminal based on a mobile communication network, and a video call service between a SIP terminal and an H.323 terminal based on a wired Internet network is provided. impossible.

On the other hand, recently, IP Multimedia Subsystem (IMS) for interworking heterogeneous communication networks based on SIP signaling has been developed in view of the trend of all-IP of wired and wireless communication networks.

However, in the IMS, only a system architecture for interworking between heterogeneous networks is defined, and a specification for optimized inter-terminal signaling for group conferencing between H.324M terminals, H.323 terminals, and SIP terminals is defined. Not implemented

The present invention has been proposed to solve the above problems and meet the above requirements, so that a group conference can be made between a terminal belonging to an H.324M network, a terminal belonging to an H.323 network, and a terminal belonging to a SIP network. When a group meeting is requested from one terminal, the IP multimedia subsystem (IMS) calls a participating terminal to participate in a group meeting and provides a group conference service to a terminal belonging to a heterogeneous video communication network. The purpose is to provide a service providing method.

In order to achieve the above object, the present invention provides a method for providing a group conference service based on SIP between an H.324M terminal, an H.323 terminal, and a SIP terminal respectively belonging to different heterogeneous video communication networks. -Requesting to set up group conference video call from H.324M terminal through relay of mobile switching center (hereinafter referred to as "MSC") at working media gateway (hereinafter referred to as "IMG") [Call Setup, IAM, request to create group conference] A first step of converting the group conference video call setting request of the H.324M terminal into an invite message [INVITE] and transmitting the converted request message to an application server (hereinafter referred to as "AS") when receiving the received message; The MRC sends the group conference video call setup request [INVITE] of the H.324M terminal received from the IMG to the multimedia resource controller (hereinafter referred to as "MRC") and receives a response [200 OK] from the MRC. Transmitting a message to the IMG; When the IMG receives the response [200 OK] from the AS, the MSC sends a response [ANM, Connect] to the H.324M terminal to the H.324M terminal through a relay of the MSC. A third step of performing negotiation between the H.324M terminal and the terminal for the subscriber image transmission [H.245 Negotiation]; Upon completion of the mutual negotiation between the terminals in the IMG, the MRC notifies the MRC of the completion of the mutual negotiation between the terminals [ACK, ACK], and the IMG receives the group conference ID and the target subscriber information from the H.324M terminal. A fourth step of receiving an input [UII]; A fifth step of converting, by the IMG, the group meeting ID and participation target subscriber information received from the H.324M terminal into an info message [INFO] and transmitting to the MRC through the relay of the AS; And when the AS receives a response [200 OK] from the MRC to the info message [INFO, group meeting ID and target subscriber information], generates a group conference of the H.324M terminal, and generates the info message [INFO]. A sixth step of inviting the corresponding group meeting terminals to the corresponding group meeting target terminals by referring to the inserted group meeting ID and the subscriber subscriber information to involve the terminals participating in the group meeting in the group meeting created by the H.324M terminal; Steps.

Another method of the present invention provides an inter-working media gateway in a method of providing a group conference service between H.324M terminals, H.323 terminals, and SIP terminals respectively belonging to different heterogeneous video communication networks based on SIP. Group conference video call setting as default parameter for performing mutual negotiation between terminals for transmission of subscriber image from H.323 terminal through relay of gatekeeper (hereinafter referred to as "G / K") Upon receiving the request [Fast Setup, request for creating a group conference], a command for fast setup processing [Call Proceeding / Alerting] is sent to the H.323 terminal through the relay of the G / K, and the IMG groups of the H.323 terminal. A first step of converting the conference video call setting request into an invite message [INVITE] and transmitting the converted video call setting request to an application server (hereinafter referred to as "AS"); The MRC sends the group conference video call setup request [INVITE] of the H.323 terminal received from the IMG to the multimedia resource controller (hereinafter referred to as "MRC") and receives a response [200 OK] from the MRC. Transmitting a message to the IMG; In response to receiving the response [200 OK] from the AS in the IMG, the H.323 terminal and the IMG are connected to the H.323 terminal through a G / K relay [Fast Connect]. A third step of receiving [UII] input of a group meeting ID and participation target subscriber information from a terminal; A fourth step of converting, by the IMG, the group conference ID and participation target subscriber information received from the H.323 terminal into an info message [INFO] and transmitting to the MRC through the relay of the AS; And when the AS receives a response [200 OK] from the MRC to the info message [INFO, group meeting ID and target subscriber information], generates a group conference of holding an H.323 terminal, and generates an info message [INFO]. A fifth step of inviting the group meeting target terminals to the corresponding group meeting target terminals by referring to the inserted group meeting ID and the subscriber subscriber information, and joining the terminal terminals participating in the group meeting to the group meeting created by the H.323 terminal; Steps.

In still another aspect of the present invention, there is provided a method for providing a group conference service between an H.324M terminal, an H.323 terminal, and a SIP terminal, each belonging to a different heterogeneous video communication network, based on SIP. When the group conference video call request (INVITE, group conference creation request) is received from the SIP terminal through the relay of the multimedia session control system (hereinafter referred to as "MSS"), the group of the SIP terminal is connected to the AS. A first step of forwarding the invite message [INVITE] corresponding to the conference video call setup request to a multimedia resource controller (hereinafter referred to as "MRC"); A second step of transmitting the response message [200 OK] to the SIP terminal through a relay of an MSS when the AS receives a response message [200 OK] for the invite message [INVITE] from the MRC; When the AS receives a temporary response message [ACK] from the SIP terminal through a relay of the MSS as a result of transmitting a response message [200 OK] and then performs negotiation between the terminals, and then is connected between the SIP terminal and the AS, the AS A third step of receiving, from the SIP terminal, an information message [INFO] in which a group conference ID and participation subscriber information are inserted; And transmitting an info message [INFO, group meeting ID and target subscriber information] received from the SIP terminal to the MRC in response to receiving the response [200 OK] from the MRC. The group is informed of the group meeting invitation to the corresponding group meeting target terminals by referring to the group meeting ID inserted in the info message [INFO] and the information on the target subscriber in the AS, and the group in the group meeting created by the SIP terminal. And a fourth step of engaging the conference target terminals.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, detailed descriptions of well-known functions or configurations will be omitted if it is determined that the detailed description of the present invention may unnecessarily obscure the subject matter of the present invention. Terms to be described later are terms defined in consideration of functions in the present invention, and may be changed according to intentions or customs of users or operators. Therefore, the definition should be made based on the contents throughout the specification.

1 is a diagram illustrating an embodiment of a heterogeneous video communication network to which the present invention is applied.

As shown in FIG. 1, an H.324M network that provides a video call service to an H.324M terminal 10 is established in a mobile communication network (preferably a WCDMA network), which is a mobile communication switching center. (MSC; Mobile Switching Center) 11 (hereinafter referred to as "MSC"), a gateway switch for interworking between the H.324M network and the IMS network (i.e., relaying signals between the MSC 11 and the IMG 40). Cellular Gateway Switch (CGS) 12 (hereinafter referred to as "CGS") and Signal Trnasfer Point (STP) 13 for signaling based on SIGTRAN (hereinafter referred to as "STP"). Base station (BS) and base station controller (BSC) 14 (hereinafter, the base station and base station controller will be collectively referred to as "BSC") and home location register (HLR). ) 15 (hereinafter referred to as "HLR") is provided.

In addition, an H.323 network providing a video call service to the H.323 terminal 20 is constructed in an IP network, and a gatekeeper (G / K; Gatekeeper) 21 (hereinafter, “ G / K ") and Multipoint Control Units (MCU) 23 (hereinafter referred to as " MCU "). Here, the MCU 23 is a device for controlling video call sessions between terminals belonging to the same H.323 network and is not involved in call processing related to video group conferencing between heterogeneous video communication networks of the present invention.

In addition, a SIP network for providing a video call service to the SIP terminal 30 is constructed in an IP network, which includes a SIP server (or SIP switch) 31, a location server 33, and an IMS. Application server (AS) 60 (hereinafter referred to as " AS ") belonging to the network, and video call processing such as a proxy server, a redirect server, etc., although not shown in the drawing. Basic components are provided for.

In particular, an IMS network that provides group conferencing services to H.324M terminals 10, H.323 terminals 20, and SIP terminals 30 belonging to different heterogeneous video communication networks is constructed based on SIP. The IMS network includes an inter-working media gateway (IMG) 40 (hereinafter referred to as "IMG"), a multimedia session control system (MSS) 50 (hereinafter referred to as "MSS"). "AS", the AS 60 and the Multimedia Resource Controller (MRC) 70 (hereinafter referred to as "MRC") belonging to the SIP network are provided.

Meanwhile, the H.323 network and the SIP network may be established in a wireless IP network, that is, a mobile communication network, not in a wired IP network. In this case, each network may include a packet data serving node for wireless Internet access of a mobile communication terminal. A component such as a PDSN (Packet Data Serving Node) and a Home Agent (HA) for providing terminal mobility may be further provided. The H.324M terminal 10, the H.323 terminal 20, and the SIP terminal 30 may be any terminal having an internet access function (packet bearer network access function). I can understand.

In the H.324M network, the MSC 11 is a node that performs setup processing for setting up a group conference video call of the present invention. Hereinafter, in the present invention, in describing a group conference video call setup process, signal processing (signaling) between the MSC 11 and the IMG 40 will be described in detail, and the known CGS 12 and the known STP will be described in detail. The description of the function of (13) will be omitted.

In the H.323 network, the G / K 21 is responsible for session / location / billing management of the H.323 terminal 20, and in particular, performs setup processing for setting up a group conference video call according to the present invention. Node. Hereinafter, in the present invention, in describing a group conference video call setup process, signal processing (signaling) between the G / K 21 and the IMG 40 will be described in detail, and a function of a known MCU 23 will be described. Description of the description will be omitted.

In the SIP network, the SIP server 31 is a node that receives the group conference service request of the present invention from the SIP terminal 30 for the first time, and when the group conference service is requested, the group conference video call of the SIP terminal 30. Routing to the MSS 50 so that the group conferencing service is processed at this MSS 50. As such, the node performing the setup process for the group conference video call setup of the present invention in the SIP network is substantially the MSS 50. Hereinafter, in the present invention, in describing a group conference video call setup process, signal processing (signaling) between the SIP terminal 30 and the MSS 50 will be described in detail, and a function of a known SIP server 31 will be described. Description of the description will be omitted.

In the IMS network, the IMG 40 converts heterogeneous video communication protocols, i.e., H.324M protocol, H.323 protocol, and SIP, to enable group conference service between heterogeneous video communication networks, and media relay, media conversion (e.g., RTP <=> H.324M), Media Stream Translation, Media transport signaling conversion, in particular the "INFO Method" of the SIP network and the "" of the H.324M network (or H.323 network). H.245 signaling conversion to convert UII "required for H.245 Negotiation. In addition, the IMG 40 performs a quality of service (QoS) function, a service level agreement (SLA) function, and an IP topology (IP). topology) provides an arbitration function, and also generates a settlement data such as video call information and data transmission amount.

In the IMS network, the MSS 50 performs a softswitch function between heterogeneous video communication networks. For example, the MSS 50 is responsible for connection and session control for group conference video calls, and provides a standard interface for interworking heterogeneous video communication networks in connection with the AS 60, and provides subscriber authentication and registration, session control and service. It performs functions such as routing and registration subscriber profile management.

In the IMS network, the AS 60 performs various application control, in particular, group conference video call control, group conference ID assignment and media in association with the IMG 40, the MSS 50, and the MRC 70, respectively. Perform control functions.

In the IMS network, the MRC 70 allocates / manages multimedia resources to the H.324M terminal 10, the H.323 terminal 20, and the SIP terminal 30, respectively. It performs media control and controls multi-party multimedia session.

In the present invention, one subscriber holds a group conference so that a group conference can be held between the H.324M terminal 10, the H.323 terminal 20, and the SIP terminal 30 belonging to different heterogeneous video communication networks as described above. In order to do so, IMS invites the subscribers to participate in the group meeting through IMS to have a group meeting. The present invention will be described in detail with reference to FIGS. 2A to 2C, 3A to 3C, and 4A to 4C.

2A to 2C, 3A to 3C, and 4A to 4C are flowcharts of a method of providing a group conference service in a heterogeneous video communication network according to the present invention. As shown in FIGS. 2A-2C, a group meeting may be created (hosted) by the H.324M terminal 10, may be created by the H.323 terminal 20, or may be created by the SIP terminal 30. 3A to 3C, except for the group conference creation subject of FIGS. 2A to 2C, the other terminals participate in the group conference, and as shown in FIGS. 4A to 4C, The terminal can also leave the group conference.

Hereinafter, the group conference video call processing of each terminal will be described in each drawing to help understand the present invention, and a person skilled in the art can easily understand that the group conference video call processing represented in each drawing is comprehensively performed. Could be. Although not shown in the drawings, signals between the IMG 40 and the AS 60 are relayed through the MSS 50, and signals between the AS 60 and the MRC 70 are also relayed through the MSS 50. Those skilled in the art will readily appreciate with reference to FIG. 1.

Figure 2a is a process for creating a group meeting of the H.324M terminal in a heterogeneous video communication network according to the present invention, that is, a group meeting creation process for inviting the target subscribers when the subscriber of the H.324M terminal 10 is holding a group meeting Flowchart for one embodiment.

First, in response to a subscriber of the H.324M terminal 10 inputting a representative telephone number (hereinafter, referred to as a "service telephone number") for a group conference for holding a group conference, the H.324M terminal 10 receives a group. The conference video call setup message [Call Setup] is transmitted to the MSC 11 (200).

Then, the MSC 11 performs the ISUP signaling process and transmits a group conference video call setup message [IAM] to the IMG 40 in response to the group conference video call setup request of the H.324M terminal 10. (201).

Accordingly, the IMG 40 recognizes the group conference creation request of the H.324M terminal 10 and converts the group conference video call setup message [IAM] of the H.324M protocol into the group conference video call setup message [INVITE] of the SIP. Converts and transmits the message to the AS 60 (202). Accordingly, the AS 60 also receives a group conference video call setup message [INVITE] from the MRC (IN) with the H.324M terminal 10 acknowledging the group conference creation request. 70) (203). At this time, when receiving a group meeting creation request from the H.324M terminal 10 through the MSC 11, the IMG 40 inquires the subscriber profile through the connection with the MSS 50 to the H.324M terminal. It is preferable to authenticate whether the subscriber on the (10) side is subscribed to the service of the present invention.

Therefore, the MRC 70 receives the group conference video call setup message [INVITE] normally and sends a response message [200 OK] to the AS 60 to indicate that it has recognized the request for generating the group conference of the H.324M terminal 10. In step 204, the AS 60 transmits a response message [200 OK] to the IMG 40 in a sense that the response message [200 OK] is normally received from the MRC 70 (205). . At this time, the MRC 70 allocates resources for the group conference to be generated by the H.324M terminal 10.

This means that the IMG 40 processes the group meeting creation request, that is, the preprocessing process in the IMS network for generating the group meeting is completed, so that the H.324M terminal 10 and the IMG 40 are connected. The MSC 11 sends a response message [ANM] for the group conference video call setting to the MSC 11. Accordingly, the MSC 11 transmits a connect message [Connect] to the H.324M terminal 10. Connect between the .324M terminal 10 and the IMG 40 (207).

In the above process, the subscriber image of the H.324M terminal 10 is transmitted between the H.324M terminal 10 and the IMG 40 while being connected between the H.324M terminal 10 and the IMG 40. Necessary terminal mutual negotiation procedure [H.245 Negotiation], for example, performs a procedure such as logical channel open, codec negotiation, master / slave decision (208).

Then, when the negotiation procedure between the H.324M terminal 10 and the IMG 40 is completed, the IMG 40 sends a temporary response message [ACK] to the AS 60 to indicate that the negotiation procedure between the terminals is completed. In step 209, the AS 60 transmits a temporary response message [ACK] to the MRC 70 in a manner of notifying that the negotiation procedure between the H.324M terminal 10 and the IMG 40 is completed. 210).

Thus, in a state in which the negotiation process between the terminals is completed between the H.324M terminal 10 and the IMG 40 by the above-described process, the H.324M terminal 10 and the IMG 40 are connected to a known H.324M protocol. Scenario for Creating Group Meeting Using Defined H.245 Negotiaton Message [UII; User Input Indicator] is performed (211). At this time, the H.324M terminal 10, together with the group meeting ID (or conference object number) to be generated according to the query of the IMG 40, participates in subscriber information (preferably terminal identification number of the service subscriber, eg; An integrated phone number or other subscriber ID for a video call, etc.) is input to the IMG 40. In detail, the group conference creation scenario [UII] is an H.245 Negotiaton message for transmitting / outputting information between the system and the terminal, such as a digit input from the terminal.

Then, the IMG 40 receives the group meeting ID / participation target subscriber information received from the H.324M terminal 10 into the group meeting creation scenario [UII] according to the H.324M protocol protocol according to the SIP protocol. / Participation target subscriber information is inserted into the body of the info message [INFO], converted, and transmitted to the AS 60 (212). In detail, the info message [INFO] is a message used to exchange arbitrary information between terminals among SIP methods, and the UII of the aforementioned H.324M protocol is the same message. As described above, in the present invention, by converting UII information according to the H.324M protocol protocol into information message information according to the SIP protocol, group conference video call processing in heterogeneous video communication networks, that is, signaling between terminals is possible.

Accordingly, the AS 60 checks the info message received from the IMG 40 and recognizes the group meeting related information to be created in the future, that is, the information in which the group meeting ID / participant subscriber information is inserted. The message [INFO] is transmitted to the MRC 70 (213), and thus the MRC 70 also acknowledges that the group message related information to be created in the future in response to the message indicating that the normal reception of the information message [200 OK] Is sent to the AS 60 (214).

Therefore, as the AS 60 receives the response message from the MRC 70, the MRC 70 confirms that the group conference related information is recognized (that is, resource allocation ready in the MRC 70 is ready). Create a group meeting of .324M terminal holdings, and participate in the corresponding terminal information corresponding to the participant subscriber information inserted in the info message (here, H.323 terminal 20 and SIP terminal 30 as well as other H.324M terminals. May be performed] (215a and 215b), respectively. Terminal joining a group meeting according to the group meeting invitation notification scenario [UII] will be described later in detail with reference to FIGS. 3A to 3C.

2b is a process of generating a group meeting of an H.323 terminal in a heterogeneous video communication network according to the present invention, that is, a group meeting generating process of inviting subscribers to participate when a subscriber of the H.323 terminal 20 holds a group meeting. Flowchart for one embodiment.

First, in response to the subscriber of the H.323 terminal 20 accessing the G / K 21 performing the group conference video call processing for holding the group conference, the H.323 terminal 20 requests the subscriber authentication. The message [ARQ] is transmitted to the G / K 21 (240). In more detail, the subscriber authentication request message [ARQ] is a message used for subscriber authentication in the H.323 protocol. In the present invention, the subscriber authentication request message [ARQ] is not a subscriber authentication for the service. It is preferably used to authenticate the subscriber to the video call service. Meanwhile, the H.323 terminal 20 registers its IP address and alias to the G / K 21 through the RAS channel, before the subscriber authentication request message [ARQ] is transmitted. In the present invention, description of the terminal registration process will be omitted.

Then, the G / K 21 inquires the subscriber profile and the like to authenticate the normal subscriber and transmits the subscriber authentication acceptance message [ACF] to the H.323 terminal 20 as a result (241).

Accordingly, as a process for generating a group conference in the state where the H.323 terminal 20 recognizes the successful subscriber authentication, a channel (commonly called a bearer channel) for transmitting a video of the subscriber is opened. In order to transmit the fast setup message (FS) to the G / K 21 (242). In more detail, the fast setup message is a message for opening a bearer channel using a default parameter without performing an H.245 Negotiation procedure as defined in the H.323 protocol.

Accordingly, the G / K 21 relays the fast setup message of the H.323 terminal 20 to the IMG 40 (243).

Then, the IMG 40 will process the fast setup for the group conference video call of the H.323 terminal 20 and call the G / K call procedure message [Call Proceeding] and allergen message [Alerting]. It transmits to the H.323 terminal 20 through the relay 21 (244, 245). In addition, the IMG 40 transmits a group conference video call setup message [INVITE] to the AS 60 in a state in which the IMG 40 recognizes the group conference creation request of the H.323 terminal 20 (246). The AS 60 also transmits a group conference video call setup message [INVITE] to the MRC 70 in a state of recognizing the group conference creation request of the H.323 terminal 20 (247). In addition, when receiving the fast setup message corresponding to the group meeting creation request from the H.323 terminal 20 through the G / K 21, the IMG 40 establishes a subscriber profile through an association with the MSS 50. It is preferable to inquire and authenticate whether the subscriber of the H.323 terminal 20 side is subscribed to the service of the present invention.

Therefore, the MRC 70 receives the group conference video call setup message [INVITE] normally and responds with a response message [200 OK] to indicate that the H.323 terminal 20 recognizes the request for generating the group conference. 248. At this time, the MRC 70 allocates resources for the group conference to be generated by the H.323 terminal 20. Accordingly, the AS 60 also transmits a response message [200 OK] to the IMG 40 in a meaning that it has normally received the response message [200 OK] from the MRC 70 (249).

This means that the IMG 40 processes the group meeting creation request, that is, the preprocessing process in the IMS network for generating the group meeting is completed, so that the H.323 terminal 20 and the IMG 40 are connected. In step 250, a connect message [Fast Connect] is transmitted to the G / K 21. Accordingly, the G / K 21 releases the standby state of the H.323 terminal 20 and transmits a connect message [Fast Connect] to the H.323 terminal 20 in order to connect with the IMG 40. The H.323 terminal 20 and the IMG 40 are connected (251). Along with this, the IMG 40 sends a temporary response message [ACK] for the response message [200 OK] received from the AS 60 to the AS 60 (252), and thus the AS 60 ) Also transmits the temporary response message [ACK] received from the IMG 40 to the MRC 70 (253).

Accordingly, in the state where the terminal mutual negotiation procedure is completed between the H.323 terminal 20 and the IMG 40 by the fast setup process as described above, the H.323 terminal 20 and the IMG 40 are well-known H.323. Scenario for creating a group conference using H.245 Negotiaton messages defined in the protocol [UII; User Input Indicator] is performed (254). At this time, the H.323 terminal 20, together with the group meeting ID (or conference object number) to be generated according to the query of the IMG 40, participates in subscriber information (preferably terminal identification number of the service subscriber, eg; An integrated phone number or other subscriber ID for a video call, etc.) is input to the IMG 40. In detail, the group conference creation scenario [UII] is an H.245 Negotiaton message for transmitting / outputting information between the system and the terminal, such as a digit input from the terminal.

Then, the IMG 40 receives the group conference ID / participation target subscriber information received from the H.323 terminal 20 into the group conference creation scenario [UII] according to the H.323 protocol protocol according to the SIP protocol. / Participant target information is inserted into the body of the info message [INFO], converted, and transmitted to the AS 60 (255). In detail, the info message [INFO] is a message used for exchanging arbitrary information between terminals among SIP methods, and the UII of the aforementioned H.323 protocol is the same message. As described above, in the present invention, by converting UII information according to the H.323 protocol protocol into information message information according to the SIP protocol, group conference video call processing in heterogeneous video communication networks, that is, signaling between terminals, is possible.

Accordingly, the AS 60 checks the info message received from the IMG 40 and recognizes the group meeting related information to be created in the future, that is, the information in which the group meeting ID / participant subscriber information is inserted. The message [INFO] is transmitted to the MRC 70 (256), and thus the MRC 70 acknowledges that the information message has been normally received while recognizing the group meeting related information to be generated. The response message [200 OK] Is transmitted to the AS 60 (257).

Therefore, as the AS 60 receives the response message from the MRC 70, the MRC 70 confirms that the group conference related information is recognized (that is, resource allocation ready in the MRC 70 is ready). Create a group conference of .323 terminal holding, and participate in the corresponding target subscriber information (here, the H.324M terminal 10 and the SIP terminal 30, as well as other H.323 terminals) corresponding to the participating subscriber information. May be performed] (258a, 258b). Terminal joining a group meeting according to the group meeting invitation notification scenario [UII] will be described later in detail with reference to FIGS. 3A to 3C.

2c is a diagram illustrating a process of generating a group conference of a SIP terminal in a heterogeneous video communication network according to the present invention, that is, a process of generating a group conference inviting participants to participate when a subscriber of the SIP terminal 30 performs a group conference. Example flowchart.

First, in response to the subscriber of the SIP terminal 30 connecting to the SIP server 31 which performs group conference video call processing for holding a group conference, the SIP terminal 30 sets a group conference video call setting message [INVITE]. ] Is transmitted to the MSS 50 (260). In other words, the group conference video call setup message [INVITE] is a message used for a video call connection (creation) request in SIP. This invite message has a terminal support media information (sdp # 1) inserted into the body. have.

In particular, since the IMS operates based on the SIP, the SIP terminal 30 directly connects to the MSS 50 through the information provided from the SIP server 31 after the first access to the SIP server 31. It is connected to send and receive signals for the group conference service. In addition, the SIP terminal 30 is a SIP server for the multimedia ringback tone service (that is, a service that provides multimedia to the calling party terminal before the video call is connected to the called party terminal) in the SIP, not the group conference service of the present invention. After the first access to the (31) through the information provided from the SIP server 31, and then connected directly to the AS (where AS is an application for processing multimedia ringback tone service video call). It transmits and receives a signal for a multimedia ringback tone service.

Then, the MSS 50 transmits the group conference video call setup message [INVITE] to the AS 60 in a state of recognizing a request for generating a group conference from the SIP terminal 30 (261). 60 also transmits the group conference video call setup message [INVITE] to the MRC 70 in a state in which the SIP terminal 30 recognizes the group conference creation request (262). Meanwhile, as shown in FIGS. 2A and 2B, the MSS 50 also preferably authenticates whether the SIP terminal 30 subscribes to the present service in place of the IMG 40.

Accordingly, the MRC 70 receives the group conference video call setup message [INVITE] of the SIP terminal 30 normally and responds with a response message [200 OK] to indicate that the MRC 70 recognizes the request for generating the group conference of the SIP terminal 30. Transmit to AS 60 (263). At this time, the MRC 70 allocates resources for the group conference to be generated by the SIP terminal 30.

Accordingly, the AS 60 also transmits the response message [200 OK] to the SIP terminal 30 through the relay of the MSS 50 in a meaning that the response message [200 OK] is normally received from the MRC 70. (264,265). Here, the media information (sdp # 2) is inserted into the body of the response message [200 OK] transmitted to the SIP terminal 30, and the terminal media information (in the invite message received from the SIP terminal 30 mentioned above) sdp # 2) is exchanged between the AS 60 and the SIP terminal 30 to perform the negotiation process between the terminals. Therefore, it is not necessary to separately perform a procedure for mutually negotiating terminals, for example, logical channel opening, codec negotiation, master / slave determination, and the like, required to transmit the subscriber image of the SIP terminal 30.

Accordingly, the SIP terminal 30 normally receives the response message through the relay of the MSS 50 to complete the negotiation process between the terminals, and transmits a temporary response message [ACK] to the MSS 50 in a manner of informing this. Therefore, the MSS 50 also indicates that the temporary response message [ACK] has been normally received from the SIP terminal 30 through the relay of the AS 60 to the MRC 70. (267, 268).

In the state where the pre-processing of the group conference video call generation is completed by the above process, the group conference generation scenario [INFO] is used between the SIP terminal 30 and the AS 60 by using an information message [INFO] defined in the known SIP. ] Is performed (269). At this time, the SIP terminal 30, together with the group meeting ID (or conference object number) to be generated according to the inquiry from the AS 60, participates in subscriber information (preferably terminal identification number of the service subscriber, eg; An integrated phone number or other subscriber ID for a video call) is inserted into the body of the info message [INFO] and transmitted to the AS 60.

Accordingly, the AS 60 checks the info message received from the SIP terminal 30 and recognizes the group meeting related information to be created in the future. An information message [INFO] is transmitted to the MRC 70 (270), and thus the MRC 70 acknowledges that the information message is normally received while recognizing the group meeting related information to be generated in the future. ] Is transmitted to the AS 60 (271). Meanwhile, in FIG. 2A and FIG. 2B, the information related to the group meeting in the form of the H.245 Negotiaton message received from the H.324M terminal 10 and the H.323 terminal 20 in the IMG 40 is a group meeting in the form of an information message. 2C is converted into related information and transmitted to the AS 60. However, in FIG. 2C, since the AS 60 and the SIP terminal 30 follow the same SIP protocol, direct communication can be performed and an info message of the same SIP protocol is used. Therefore, the information related to the group conference is transmitted, so there is no need for a separate conversion process.

Accordingly, as the AS 60 receives the response message from the MRC 70, the SIP checks that the group conference related information is recognized in the MRC 70 (that is, the resource allocation is ready in the MRC 70). Participation target terminals (herein, H.32M terminal 10 and H.323 terminal 20 as well as other SIP terminals) may be created by creating a group conference of terminal holding and corresponding to the participation target subscriber information inserted in the info message. Yes] to perform the group meeting invitation notification scenario [UII] (272a, 272b). Terminal joining a group meeting according to the group meeting invitation notification scenario [UII] will be described later in detail with reference to FIGS. 3A to 3C.

3A illustrates a process of participating in a group meeting of an H.324M terminal in a heterogeneous video communication network according to the present invention, that is, receiving an invitation to a group meeting held by an H.323 terminal or a SIP terminal of another subscriber. 1 is a flowchart illustrating a process in which a terminal participates. The process of FIG. 3A proceeds when the H.323 terminal 20 or the SIP terminal 30 shown in FIGS. 2B and 2C, respectively, designates the target subscriber information as the H.324M terminal 10.

First, the AS 60 reads the group conference related information received from the H.323 terminal 20 or the SIP terminal 30 (hereinafter, the SIP terminal 30 is illustrated in FIG. 3A) according to the group conference creation scenario. Inserted into the body of the byte message [INVITE] and transmitted to the MRC 70 to inform that the participating terminal, that is, the H.324M terminal 10 participates in the group conference created by the SIP terminal 30 in the MRC 70 Prepare to perform the multi-party multimedia session control function (300). Accordingly, the MRC 70 transmits a response message [200 OK] to the AS 60 to indicate that the MRC 70 has recognized that the H.324M terminal 10 intends to join the group meeting (301).

Accordingly, the AS 60 sends a group conference video call setup message [INVITE] to the H.324M terminal 10 in order to join the H.324M terminal 10 to the group conference created by the SIP terminal 30. It transmits to the IMG 40 connected with the receiving MSC 11 (302).

The IMG 40 then converts the group conference video call setup message [INVITE] of the SIP into a group conference video call setup message [IAM] of the H.324M protocol and converts the group conference video call setup message [IAM] to the MSC ( 11) (303).

Accordingly, when the MSC 11 receives the group conference video call setup message [IAM] and recognizes that the H.324M terminal 10 intends to participate in the group conference, the ISUP signaling process is performed. The mutual setup message [Call Setup] is transmitted to the H.324M terminal 10 (304).

Accordingly, in the state where the H.324M terminal 10 recognizes the group meeting invitation of the SIP terminal 30, the H.324M terminal 10 transmits a connect message [Connect] to the MSC 11 in order to connect with the IMG 40 (305). Accordingly, the MSC 11 transmits a response message [ANM] for setting up a group conference video call to the IMG 40 to connect between the H.324M terminal 10 and the IMG 40 ( 306).

Then, in the state where the IMG 40 recognizes the connection of the H.324M terminal 10, the 180 ringing message [180 Ringing] to the AS 60 to inform the fact that the connection of the H.324M terminal 10. Send (307).

In addition, the subscriber image of the H.324M terminal 10 between the H.324M terminal 10 and the IMG 40 in a state connected between the H.324M terminal 10 and the IMG 40 in the above process. A terminal performs a negotiation procedure [H.245 Negotiation] necessary for transmitting, for example, a logical channel open, codec negotiation, master / slave decision, etc. (308).

Then, when the negotiation procedure between the H.324M terminal 10 and the IMG 40 is completed, the IMG 40 responds with a message indicating that the terminal negotiation procedure with the H.324M terminal 10 is completed. ] Is sent to the AS 60 (309). Accordingly, the AS 60 transmits a temporary response message [ACK] to the IMG 40 to indicate that the AS 60 has normally received the response message (310), and the AS 60 transmits the H.324M terminal ( 10) and transmits a temporary response message [ACK] to the MRC 70 in a meaning that the negotiation procedure between the IMG 40 and the IMG 40 is completed (311).

Thus, in a state in which the negotiation process between the terminals is completed between the H.324M terminal 10 and the IMG 40 by the above-described process, the H.324M terminal 10 and the IMG 40 are connected to a known H.324M protocol. Perform the group conference participation scenario [UII] using the defined H.245 Negotiaton message (312). At this time, the H.324M terminal 10 checks the group meeting ID (or conference object number) generated by the SIP terminal 30 in response to the query of the IMG 40 to inform the IMG 40 of the intention to participate in the group meeting. Enter it.

Then, the IMG 40 receives the intention to participate in the group conference of the H.324M terminal 10 received in the group conference participation scenario [UII] from the H.324M terminal 10 according to the H.324M protocol protocol according to the SIP protocol. The intention to participate in the group meeting is inserted into the body of the info message [INFO], converted, and transmitted to the AS 60 (313). As described above, in the present invention, by converting UII information according to the H.324M protocol protocol into information message information according to the SIP protocol, group conference video call processing in heterogeneous video communication networks, that is, signaling between terminals is possible.

Accordingly, the AS 60 checks the info message received from the IMG 40 and recognizes the H.324M terminal 10 participating in the group conference, that is, the H.324M terminal 10. The intention to participate in the group conference of the group transmits the inserted information message [INFO] to the MRC 70 (314), the MRC (70) also in the state of recognizing the H.324M terminal 10 participating in the group conference A response message [200 OK] is transmitted to the AS 60 in a meaning that the message is normally received (315).

Accordingly, as the AS 60 receives the response message from the MRC 70, the SIP terminal recognizes that resource allocation is made for the H.324M terminal 10 participating in the group conference in the MRC 70. Participate the H.324M terminal 10 in the group meeting created by the (30), and the other terminal participating in the group meeting (here, H.323 terminal 20 and SIP terminal 30 as an example). Report the fact that the H.324M terminal 10 participates in the group meeting, that is, the AS 60 confirms the other terminal information participating in the group meeting through the group meeting ID information, and the process "313" (and the " Info message in step 314 ", for example, the intention to participate in the group meeting of the H.324M terminal 10 transmits the inserted info message [INFO] to the IMG 40 (316a, 316b).

Then, the IMG 40 checks the destination (i.e., receiving target terminal) information of the info message [INFO] received from the AS 60 to determine which video communication network belongs and performs the information message conversion process to the corresponding terminal. Notify that the H.324M terminal 10 participates in the group meeting. That is, if the terminal that will receive the fact that the H.324M terminal 10 participates in the group conference is the H.323 terminal 20, the IMG 40 adapts the SIP conference message according to the H.323 protocol. ] Is transmitted to the H.323 terminal 20 (317a). On the other hand, if the terminal to receive the fact that the H.324M terminal 10 participates in the group conference is the SIP terminal 30, the IMG 40 follows the same SIP protocol, so that the IMG 40 converts the above information message to the MSS without separately converting the SIP information message. Transmission to the SIP terminal 30 through the relay 50 (317b, 317c).

Subsequently, in the state where the H.324M terminal 10 participates in the group conference through the multi-party multimedia session control function by the MRC 70, the H.324M protocol, that is, H.223 of the video call protocol of the mobile communication network is used. The multimedia (audio / video) of the H.324M terminal 10 that is transmitted and received is converted to the multimedia that is transmitted and received by using the RTP / UDP / IP suitable for the IP network by the IMG 40 and the other terminal [H.323 terminal ( 20) and the SIP terminal 30) (318a, 318b).

3b is a process of participating in a group meeting of an H.323 terminal in a heterogeneous video communication network according to the present invention, that is, receiving an invitation to a group meeting held by an H.324M terminal or a SIP terminal of another subscriber. 1 is a flowchart illustrating a process in which a terminal participates. The process of FIG. 3B proceeds when the H.324M terminal 10 or the SIP terminal 30 shown in FIG. 2A and FIG. 2C, respectively, designates the target subscriber information as the H.323 terminal 20.

First, the AS 60 reads the group conference related information received from the H.324M terminal 10 or the SIP terminal 30 (hereinafter referred to as the SIP terminal 30 in FIG. 3B) according to the group conference creation scenario. Inserted into the body of the byte message [INVITE] and transmitted to the MRC 70 to inform that the participating terminal, that is, the H.323 terminal 20 is participating in the group conference created by the SIP terminal 30 in the MRC 70 The multi-party multimedia session control function is prepared to perform (330). Accordingly, the MRC 70 transmits a response message [200 OK] to the AS 60 to indicate that the MRC 70 has recognized that the H.323 terminal 20 is going to participate in the group meeting (331).

Accordingly, in order for the AS 60 to join the H.323 terminal 20 to the group conference created by the SIP terminal 30, the AS 60 sends a group conference video call setup message [INVITE] to the H.323 terminal 20. It transmits to the IMG 40 connected to the receiving G / K 21 (332).

The IMG 40 then sends a group conferencing video call setup message [INVITE] of SIP to open a channel for video transmission of the subscriber; Fast Setup] and transmits this fast setup message to the G / K 21 (333). Accordingly, the G / K 21 receives the fast setup message and relays the fast setup message to the H.323 terminal 20 in the state of recognizing the H.323 terminal 20 to participate in the group meeting (334). ).

Accordingly, in the state where the H.323 terminal 20 recognizes the group meeting invitation of the SIP terminal 30, the subscriber authentication request message [ARQ] is sent to the G / K 21 in the sense that it connects to the IMG 40. In operation 335, the G / K 21 performs an authentication procedure and transmits a subscriber authentication acceptance message [ACF] to the H.323 terminal 20 as a result (336).

Then, the H.323 terminal 20 will process the fast setup for the group conference video call requested by the IMG 40, so that the call procedure message [Call Proceeding] and the allergic message [Alerting] are requested. / K 21 transmits to IMG 40 via relay (337, 338).

Accordingly, the IMG 40 transmits a 180 ringing message (180 Ringing) to the AS 60 in the sense that the fast setup process of the H.323 terminal 20 is performed (339).

In the meantime, since the H.323 terminal 20 processes the group meeting participation request, that is, the preprocessing process at the H.323 terminal 20 for joining the group meeting is completed, the H.323 terminal 20 and the IMG are completed. In operation 340, the connect message [Fast Setup Connect] is transmitted to the G / K 21 in a meaning of connecting the 40. Accordingly, the G / K 21 releases the standby state of the IMG 40 and transmits a connect message [Fast Setup Connect] to the IMG 40 in order to connect with the H.323 terminal 20. 323 Connects between the terminal 20 and the IMG 40 (341). On the other hand, while the connection between the H.323 terminal 20 and the IMG 40 should be performed between the terminal negotiation procedure such as H.245 Negotiation shown in Figure 3a, but the bearer channel was opened with a default parameter using a fast setup message. Therefore, a separate negotiation process between terminals is unnecessary.

Then, when the connection between the H.323 terminal 20 and the IMG 40 is completed, that is, when the terminal mutual negotiation procedure is completed, the IMG 40 indicates that the terminal negotiation procedure with the H.323 terminal 20 is completed. In response to the response message [200 OK] to the AS (60) (342). Accordingly, the AS 60 transmits a temporary response message [ACK] to the IMG 40 to indicate that the AS 60 has normally received the response message (343), and the AS 60 transmits the H.323 terminal (343). 20) and a temporary response message [ACK] is transmitted to the MRC 70 to indicate that the negotiation procedure between the IMG 40 is completed (344).

Thus, in a state in which the negotiation process between the terminals is completed between the H.323 terminal 20 and the IMG 40 by the above-described process, the H.323 terminal 20 and the IMG 40 are connected to a known H.323 protocol. Perform the group conference participation scenario [UII] using the defined H.245 Negotiaton message (345). At this time, the H.323 terminal 20 checks the group meeting ID (or conference object number) generated by the SIP terminal 30 in response to the query of the IMG 40 to inform the IMG 40 of the intention to participate in the group meeting. Enter it.

Then, the IMG 40 receives the group conference participation intention of the H.323 terminal 20 received from the H.323 terminal 20 into the group conference participation scenario [UII] according to the H.323 protocol protocol according to the SIP protocol. The intention to participate in the group meeting is inserted into the body of the info message [INFO], converted, and transmitted to the AS 60 (346). As described above, in the present invention, by converting UII information according to the H.323 protocol protocol into information message information according to the SIP protocol, group conference video call processing in heterogeneous video communication networks, that is, signaling between terminals, is possible.

Accordingly, the AS 60 checks the info message received from the IMG 40 and recognizes the H.323 terminal 20 participating in the group conference, that is, the H.323 terminal 20. The informational message [INFO] inserted by the intention to participate in the group meeting is transmitted to the MRC 70 (347), and thus the MRC 70 also recognizes the H.323 terminal 20 participating in the group meeting. A response message [200 OK] is transmitted to the AS 60 in a meaning indicating that the message is normally received (348).

Accordingly, as the AS 60 receives the response message from the MRC 70, the SIP terminal recognizes that resource allocation has been made for the H.323 terminal 20 participating in the group conference in the MRC 70. Participate the H.323 terminal 20 in the group meeting created by the 30, and the other terminal participating in the group meeting (here, H.324M terminal 10 and SIP terminal 30, for example) It informs the fact that the H.323 terminal 20 participates in the group meeting, that is, the AS 60 checks the other terminal information participating in the group meeting through the group meeting ID information, and the process "346" (and ""). Info message in step 347 ", for example, the intention to participate in the group meeting of the H.323 terminal 20 transmits the inserted info message [INFO] to the IMG 40 (349a, 349b).

Then, the IMG 40 checks the destination (i.e., receiving target terminal) information of the info message [INFO] received from the AS 60 to determine which video communication network belongs and performs the information message conversion process to the corresponding terminal. Announce the fact that the H.323 terminal 20 participates in the group meeting. That is, if the terminal to receive the fact that the H.323 terminal 20 participates in the group conference is the H.324M terminal 10, the IMG 40 sets the SIP conference information message according to the H.324M protocol. ] To the H.324M terminal 10 (350a). On the other hand, if the terminal to receive the fact that the H.323 terminal 20 participates in the group conference is the SIP terminal 30, the IMG 40 follows the same SIP protocol, so that the IMG 40 converts the above information message to the MSS without separately converting the SIP information message. Transmitting to the SIP terminal 30 through the relay (50) (350b, 350c).

Thereafter, the multimedia (audio / video) of the H.323 terminal 20 is connected to the IP network in a state in which the H.323 terminal 20 participates in a group conference through a multi-media multimedia session control function by the MRC 70. Since the appropriate RTP / UDP / IP is used and transmitted and received, the media transmission protocol conversion process is unnecessary by the IMG 40, and a group conference with other terminals [H.324M terminal 10 and SIP terminal 30] is performed. (351).

3c illustrates a process of participating in a group conference of a SIP terminal in a heterogeneous video communication network according to the present invention, that is, an SIP terminal is invited to a group conference held by an H.324M terminal or an H.323 terminal of another subscriber. One embodiment flow diagram for the process of participating. The process of FIG. 3C proceeds when the H.324M terminal 10 or the H.323 terminal 20 shown in FIGS. 2A and 2B, respectively, designates the participant subscriber information as the SIP terminal 30.

First, the AS 60 receives a group conference received from an H.324M terminal 10 or an H.323 terminal 20 (hereinafter, H.323 terminal 20 is illustrated in FIG. 3C) according to a group conference generation scenario. The relevant information is inserted into the body of the invite message [INVITE] and transmitted to the MRC 70 to inform that the participating terminal, that is, the SIP terminal 30, participates in the group conference created by the H.323 terminal 20. In step 70, the multi-party multimedia session control function is prepared to be performed (360). Accordingly, the MRC 70 transmits a response message [200 OK] to the AS 60 as a signal indicating that the MRC 70 has recognized that the SIP terminal 30 is to participate in the group meeting (361).

The AS 60 then accepts the SIP terminal 30 with a group conference video call setup message [INVITE] in order to join the SIP terminal 30 to the group conference created by the H.323 terminal 20. The transmission is transmitted to the SIP terminal 30 through the relay of the MSS 50 (362, 363). As such, since the AS 60 and the SIP terminal 30 follow the same SIP protocol, there is no need for a separate message conversion, but since the direct connection between the AS 60 and the SIP terminal 30 is impossible, Go through the relay

Accordingly, when the SIP terminal 30 recognizes the group meeting invitation of the H.323 terminal 20, the MSS 50 sends a 180 ringing message for the invite message to participate in the group meeting. It transmits to the AS 60 through the relay (364, 365).

Subsequently, the SIP terminal 30 transmits the 180 ringing message to the AS 60 in a meaning that the SIP terminal 30 has normally received the invite message as described above, and then the media information (sdp # 1) of the self [SIP terminal 30]. ) Transmits the inserted response message [200 OK] to the AS 60 through the relay of the MSS 50 (366 and 367). Even at this time, the negotiation procedure between the terminals between the AS 60 and the SIP terminal 30 is performed by the invite message sent from the AS 60 to the SIP terminal 30 and the response message sent from the SIP terminal 30 to the AS 60. Is done.

Then, when the connection between the SIP terminal 30 and the AS 60 is completed, that is, when the terminal mutual negotiation procedure is completed, the AS 60 indicates that the terminal negotiation procedure with the SIP terminal 30 is completed. [ACK] is transmitted to the IMG 40 and the MRC 70, respectively (368 and 369).

Accordingly, in the above-described process, the negotiation process between the terminals between the SIP terminal 30 and the AS 60 is completed, the information message defined in the known SIP between the SIP terminal 30 and the AS (60) [INFO] In step 370, the group conference participation scenario is performed by using a group meeting. At this time, the SIP terminal 30 inserts the group conference ID (or conference target number) generated by the H.323 terminal 20 into the body of the information message according to the inquiry from the AS 60 to the AS 60. By sending, you indicate your intention to join the group meeting.

Accordingly, the AS 60 confirms the info message received from the SIP terminal 30 and recognizes the SIP terminal participating in the group conference. In this state, the intention to participate in the group meeting of the SIP terminal 30 is determined. Transmits the inserted info message [INFO] to the MRC 70 (371), and the MRC 70 also responds to the message indicating that the information message is normally received while recognizing the SIP terminal participating in the group conference. [200 OK] is transmitted to the AS 60 (372).

Accordingly, when the AS 60 receives the response message from the MRC 70, the H.323 terminal recognizes that resource allocation has been made for the SIP terminal 30 participating in the group conference in the MRC 70. Participate the SIP terminal 30 in the group conference created by 20 and participate in the above group conference (in this example, H.324M terminal 10 and H.323 terminal 20). Inform the fact that the SIP terminal 30 participates in the group meeting, that is, the AS 60 checks the other terminal information participating in the group meeting through the group meeting ID information and informs the user of the information message in the process “371”, for example. The intention message to participate in the group conference of the SIP terminal 30 transmits the inserted information message [INFO] to the IMG 40 (373a and 373b).

Then, the IMG 40 checks the destination (i.e., receiving target terminal) information of the info message [INFO] received from the AS 60 to determine which video communication network belongs and performs the information message conversion process to the corresponding terminal. Notify that the SIP terminal 30 participates in the group conference. That is, if the terminal to receive the fact that the SIP terminal 30 participates in the group meeting is the H.324M terminal 10, the IMG 40 sends the SIP information message to the group meeting participation notification scenario [UII] according to the H.324M protocol. It converts and transmits it to the H.324M terminal 10 (374a). Meanwhile, if the terminal to receive the fact that the SIP terminal 30 participates in the group meeting is the H.323 terminal 20, the IMG 40 sends the SIP information message to the group meeting participation notification scenario [UII] according to the H.323 protocol. And converts the data to the H.323 terminal 20 (374b).

Subsequently, in the state where the SIP terminal 30 participates in the group conference through the multi-party multimedia session control function by the MRC 70, the multimedia (audio / video) of the SIP terminal 30 is suitable for the IP network. / IP is used to transmit and receive, the media transmission protocol conversion process is unnecessary separately by the IMG 40, and has a group conference with other terminals (H.324M terminal 10 and H.323 terminal 20) (375).

Figure 4a is a process of leaving a group meeting of an H.324M terminal in a heterogeneous video communication network according to the present invention, i.e., a process of leaving a group meeting held by an H.323 terminal, a SIP terminal, or a self (H.324M terminal). Flowchart for one embodiment.

First, the MSC 11 sends a group conference call release message [Release] to leave the group conference while the H.324M terminal 10 participates in the group conference through the multi-media multimedia session control function by the MRC 70. To transmit (400).

Accordingly, the MSC 11 notifies the IMG 40 of the H.324M terminal 10 request to leave the group conference by using the REL message of the H.324M protocol (401). The REL message of the .324M protocol is converted into a group conference video call termination message [BYE] of SIP and transmitted to the AS 60 (402).

Then, the AS 60 transmits the group conference call termination message [BYE] to the MRC 70 in a state in which the AS 60 recognizes the group conference withdrawal request of the H.324M terminal 10 and thus the H.324M terminal 10. Announce that she has left the group meeting (403).

Therefore, the MRC 70 releases the group conference related resources allocated to the H.324M terminal 10 and sends a response message [200 OK] to the group conference video call end message [BYE]. In step 404, the AS 60 transmits the above response message [200 OK] to the IMG 40, recognizing that the group withdrawal from the H.324M terminal 10 is normally completed (405). ).

Accordingly, the IMG 40 converts the response message of the SIP [200 OK], that is, the response to the group conference withdrawal request of the H.324M terminal 10 into an RLC message of the H.324M protocol and transmits it to the MSC 11. (406).

Figure 4b is a process of leaving a group meeting of an H.323 terminal in a heterogeneous video communication network according to the present invention, that is, a process of leaving a group meeting held by an H.324M terminal or a SIP terminal or a self (H.323 terminal). Flowchart for one embodiment.

First, in order to leave a group conference while the H.323 terminal 20 participates in the group conference through the multi-party multimedia session control function by the MRC 70, the H.323 terminal 20 groups the IMG 40 with the group. The conference video call release [End Session] is performed (430).

Then, when the group conference video call release between the H.323 terminal 20 and the IMG 40 is completed, the H.323 terminal 20 transmits a Release Complete message to the G / K 21 to release the group conference video call. In operation 431, the G / K 21 notifies the IMG 40 in the above Release Complete message that the group conference call release completion of the H.323 terminal 20 is normally completed. .

Accordingly, the IMG 40 converts the Release Complete message of the H.323 protocol into a group conference video call termination message [BYE] of SIP and transmits the message to the AS 60 (433).

Then, the AS 60 transmits the group conference call termination message [BYE] to the MRC 70 in a state in which the AS 60 recognizes the group conference withdrawal request of the H.323 terminal 20. Announce the withdrawal from the group meeting (434).

As a result, the MRC 70 releases the group conference related resources allocated to the H.323 terminal 20 and sends a response message [200 OK] to the group conference video call end message [BYE]. In step 435, the AS 60 transmits the above response message [200 OK] to the IMG 40 in response to recognizing that the group withdrawal of the H.323 terminal 20 is normally completed. ).

On the other hand, between the H.323 terminal 20 and the G / K 21, a DRQ message, which is a well-known video call termination process, and a DCF message transmission process for the DRQ message are passed (437 and 438).

4C is a diagram illustrating a process of leaving a group conference of a SIP terminal in a heterogeneous video communication network, that is, a process of leaving a group meeting held by an H.324M terminal or an H.323 terminal or a self (SIP terminal). One embodiment flow chart.

First, the MRC 70 relays a group conference call termination message [BYE] to the MSS 50 to withdraw from the group conference with the SIP terminal 30 participating in the group conference through the multi-party multimedia session control function. Through the transmission to the AS (60) (460, 461).

Then, the AS 60 transmits the group conference call termination message [BYE] to the MRC 70 in a state in which the AS 60 recognizes the withdrawal of the group conference from the SIP terminal 30. (462).

Accordingly, the MRC 70 releases the group conference related resources allocated to the SIP terminal 30 and transmits a response message [200 OK] to the group conference video call termination message [BYE] to the AS 60. Accordingly, the AS 60 recognizes that the group conference withdrawal of the SIP terminal 30 is normally completed (463), and sends the response message [200 OK] to the SIP terminal 30 through the relay of the MSS 50. (464, 465).

As described above, the present invention can simplify the signaling procedure for group conferencing between heterogeneous video communication networks, thereby simplifying the use of the group conferencing service of subscribers, and in particular, the group conferencing service fee can be lowered by using a simple signaling procedure.

While the content of the present invention has been described by way of examples, the embodiments of the present invention are merely illustrative of the present invention and should not be construed as limiting the scope of the present invention. Those skilled in the art to which the present invention pertains may modify or alter the present invention in various forms within the principles and scope described in the claims herein.

As described above, the present invention has an effect of enabling a video call between an H.324M terminal based on a heterogeneous video communication network such as a mobile communication network (wireless internet network) and an H.323 terminal and a SIP terminal based on a wired internet network. have.

In addition, the present invention defines a specification for the signaling between heterogeneous video communication networks implemented by different video communication protocols, so that group conferencing between H.324M terminals, H.323 terminals, and SIP terminals belonging to heterogeneous video communication networks can be established. It has the effect of being optimized.

In addition, the present invention can simplify the signaling procedure for group conferencing between heterogeneous video communication networks, thereby simplifying the use of the group conferencing service of subscribers, and in particular, it is possible to lower the group conferencing service fee by using a simple signaling procedure. .

Claims (12)

A method for providing a group conference service between H.324M terminals, H.323 terminals, and SIP terminals respectively belonging to different heterogeneous video communication networks based on SIP, Request to set up a group conference video call from an H.324M terminal through the relay of a mobile switching center (hereinafter referred to as "MSC") at an inter-working media gateway (hereinafter referred to as "IMG") [Call Setup, IAM, request to create a group conference] A first step of converting the group conference video call setting request of the H.324M terminal into an invite message [INVITE] and transmitting the converted request message to an application server (hereinafter referred to as "AS"); The MRC sends the group conference video call setup request [INVITE] of the H.324M terminal received from the IMG to the multimedia resource controller (hereinafter referred to as "MRC") and receives a response [200 OK] from the MRC. Transmitting a message to the IMG; When the IMG receives the response [200 OK] from the AS, the MSC sends a response [ANM, Connect] to the H.324M terminal to the H.324M terminal through a relay of the MSC. A third step of performing negotiation between the H.324M terminal and the terminal for the subscriber image transmission [H.245 Negotiation]; Upon completion of the mutual negotiation between the terminals in the IMG, the MRC notifies the MRC of the completion of the mutual negotiation between the terminals [ACK, ACK], and the IMG receives the group conference ID and the target subscriber information from the H.324M terminal. A fourth step of receiving an input [UII]; A fifth step of converting, by the IMG, the group meeting ID and participation target subscriber information received from the H.324M terminal into an info message [INFO] and transmitting to the MRC through the relay of the AS; And When the AS receives a response [200 OK] from the MRC to the info message [INFO, group meeting ID and participating subscriber information], a group conference of H.324M terminal holding is generated and inserted into the info message [INFO]. A sixth step of inviting the corresponding group meeting terminals to the corresponding group meeting target terminals by referring to the registered group meeting ID and the information on the target subscribers, and participating in the group meeting target terminals in the group meeting created by the H.324M terminal; Group conference service providing method in a heterogeneous video communication network comprising a. A method for providing a group conference service between H.324M terminals, H.323 terminals, and SIP terminals respectively belonging to different heterogeneous video communication networks based on SIP, Inter-working media gateway (hereinafter referred to as "IMG") through relaying of gatekeepers (hereinafter referred to as "G / K") to perform mutual negotiation of terminals for subscriber image transmission from the H.323 terminal as a default parameter. Upon receiving a group meeting video call setup request [Fast Setup, Group meeting creation request], a command for fast setup processing [Call Proceeding / Alerting] is sent to the H.323 terminal through the relay of the G / K. A first step of converting the group conference video call setting request of the .323 terminal into an invite message [INVITE] and transmitting it to an application server (hereinafter referred to as "AS"); The MRC sends the group conference video call setup request [INVITE] of the H.323 terminal received from the IMG to the multimedia resource controller (hereinafter referred to as "MRC") and receives a response [200 OK] from the MRC. Transmitting a message to the IMG; In response to receiving the response [200 OK] from the AS in the IMG, the H.323 terminal and the IMG are connected to the H.323 terminal through a G / K relay [Fast Connect]. A third step of receiving [UII] input of a group meeting ID and participation target subscriber information from a terminal; A fourth step of converting, by the IMG, the group conference ID and participation target subscriber information received from the H.323 terminal into an info message [INFO] and transmitting to the MRC through the relay of the AS; And When the AS receives a response [200 OK] from the MRC to the info message [INFO, group conference ID and target subscriber information], a group conference of H.323 terminal holding is generated and inserted into the info message [INFO]. A fifth step of informing the corresponding group meeting target terminals to the corresponding group meeting target terminals by referring to the registered group meeting ID and the information on the target subscribers, and participating in the group meeting target terminals in the group meeting generated by the H.323 terminal; Group conference service providing method in a heterogeneous video communication network comprising a. A method for providing a group conference service between H.324M terminals, H.323 terminals, and SIP terminals respectively belonging to different heterogeneous video communication networks based on SIP, When the application server (hereinafter referred to as "AS") receives a group conference video call setup request [INVITE, group conference creation request] from the SIP terminal through the relay of the multimedia session control system (hereinafter referred to as "MSS"), A first step of forwarding the invite message [INVITE] corresponding to the group conference video call setup request of the SIP terminal to a multimedia resource controller (hereinafter referred to as "MRC"); A second step of transmitting the response message [200 OK] to the SIP terminal through a relay of an MSS when the AS receives a response message [200 OK] for the invite message [INVITE] from the MRC; When the AS receives a temporary response message [ACK] from the SIP terminal through the relay of the MSS as a result of transmitting a response message [200 OK] and then performs negotiation between the terminals, and then is connected between the SIP terminal and the AS, the AS A third step of receiving an information message [INFO] in which a group conference ID and participation target subscriber information are inserted from the SIP terminal; And When the AS transmits an info message [INFO, group meeting ID and target subscriber information] received from the SIP terminal to the MRC and receives a response [200 OK] from the MRC, a group meeting of the SIP terminal is generated. In the AS, the group meeting ID is notified to the corresponding group meeting target terminals by referring to the group meeting ID inserted in the info message [INFO] and the subscriber target information, and the group meeting to the group meeting created by the SIP terminal. 4th step of participating in participating terminals Group conference service providing method in a heterogeneous video communication network comprising a. The method according to any one of claims 1 to 3, The process of inviting the H.324M terminal A to a group meeting created by a specific terminal B by notifying a group meeting invitation to a specific H.324M terminal A among the group meeting target terminals, A first step of transmitting a group conference call setup message [INVITE] to the IMG when the AS receives a response [200 OK] from the MRC as a result of notifying the MRC of the scheduled involvement [INVITE] of the H.324M terminal A in the AS; ; As a result of converting the group conference video call setup message [INVITE] received from the AS into the group conference video call setup message [IAM] in the IMG and transmitting the result to the MSC, the H.324M terminal A and the IMG through the relay of the MSC. When connected [Call Setup, Connect, ANM], it notifies the AS that the connection of the H.324M terminal A [180 Ringing] and negotiates with the H.324M terminal A the terminal for the subscriber image transmission [H.245 Negotiation] A second process to perform; When the mutual negotiation between the terminals is completed in the IMG, the MRC is notified of the completion of the mutual negotiation between terminals [200 OK, ACK] and receives a temporary response [ACK] from the AS, and the H in the IMG. .324 A third step of receiving an input [UII] from a terminal A to participate in a group meeting; A fourth step of converting the group meeting participation intention received from the H.324M terminal A in the IMG into an info message [INFO] and transmitting to the MRC through the relay of an AS; And When the AS receives a response [200 OK] from the MRC to the info message [INFO, group meeting participation intention], it joins the H.324M terminal A to the group meeting created by the specific terminal B. And a fifth process of informing the group meeting participation intention [INFO] of the terminal 324M of the terminal A to the group meeting target terminals. The method according to any one of claims 1 to 3, The process of inviting the H.323 terminal A to a group conference generated by a specific terminal B by informing a specific H.323 terminal A of a group meeting target terminal is informed of a group meeting invitation fact, A first step of transmitting a group conference call setup message [INVITE] to the IMG when the AS receives a response [200 OK] from the MRC as a result of notifying the MRC of the scheduled involvement of the group meeting of the H.323 terminal A [INVITE]; ; In order to perform negotiation between terminals for subscriber image transmission as a default parameter, a group keeper video call setup message [INVITE] received from an AS in the IMG is converted into a fast setup message [Fast Setup] and a gatekeeper (hereinafter referred to as "G / K"). When a fast setup process waiting message [Call Proceeding / Alerting] is received from the H.323 terminal A through the relay of the G / K as a result of transmission to the H.323 terminal A, the H.323 terminal A is fast forwarded from the IMG to the AS. A second step of notifying of setup waiting for waiting [180 Ringing]; As a result of waiting for the fast setup process, when a fast connection is received from the H.323 terminal A and connected between the H.323 terminal A and the IMG, the connection fact of the H.323 terminal A [200 OK] is transmitted from the IMG to the AS. A third process of receiving a temporary response [ACK] from the AS and receiving an intention to participate in a group conference from the H.323 terminal A [UII] by receiving an interim response [200 OK, ACK] from the AS through the relay ; A fourth step of converting the group meeting participation intention received from the H.323 terminal A into an info message [INFO] in the IMG and transmitting the information to the MRC through the relay of an AS; And When the AS receives a response [200 OK] from the MRC to the info message [INFO, group meeting participation intention], it joins the H.323 terminal A to the group meeting created by the specific terminal B. 323. A method of providing a group conference service in a heterogeneous video communication network, comprising a fifth process of informing a terminal conference participation intention [INFO] of the terminal A to the group conference target terminals. The method according to any one of claims 1 to 3, The process of inviting the SIP terminal A to the group conference generated by the specific terminal B by informing the specific SIP terminal A of the group meeting target terminals of the group meeting invitation, When the AS receives a response [200 OK] from the MRC as a result of notifying the MRC that the terminal terminal is going to participate in the group meeting [INVITE] of the SIP terminal A, the group conference video call setup message [INVITE] is sent to the multimedia session control system (hereinafter referred to as "MSS"). Transmitting to the SIP terminal A through the relay; The AS receives a response to the group conference video call setup message from the SIP terminal A [180 Ringing] and the terminal information of the SIP terminal A [200 OK, the terminal performs negotiation with each other] through the relay of the MSS. When connected between ASs, the AS informs IMG and MRC of the fact that the SIP terminal A has connected to each other / the end of negotiation with each other. [ACK]. INFO]; And When the AS sends an info message [INFO, group meeting participation intention] received from the SIP terminal A to the MRC and receives a response [200 OK] from the MRC, the SIP is sent to the group meeting created by the specific terminal B. And a third step of joining the terminal A and informing the group conference participation intention [INFO] of the SIP terminal A to the terminal groups participating in the group conference. The method according to any one of claims 1 to 3, When the AS sends a group meeting participation intention [INFO] of a specific terminal, which is one of the group meeting participation terminals, to the IMG, the IMG determines a destination of the info message [INFO, group meeting participation intention], If the determined result is the H.324M terminal, converting the info message [INFO, group meeting participation intention] into a group meeting participation notification scenario [UII] and transmitting the same to the H.324M terminal; Group conference service providing method in a heterogeneous video communication network further comprising. The method according to any one of claims 1 to 3, When the AS sends a group meeting participation intention [INFO] of a specific terminal, which is one of the group meeting participation terminals, to the IMG, the IMG determines a destination of the info message [INFO, group meeting participation intention], If the determined result is the H.323 terminal, converting the info message [INFO, group meeting participation intention] into a group meeting participation notification scenario [UII] and transmitting the same to the H.323 terminal; Group conference service providing method in a heterogeneous video communication network further comprising. The method according to any one of claims 1 to 3, When the AS sends a group meeting participation intention [INFO] of a specific terminal, which is one of the group meeting participation terminals, to the IMG, the IMG determines a destination of the info message [INFO, group meeting participation intention], If the determination result is a SIP terminal, forwarding the info message [INFO, group conference participation intention] to the SIP terminal; Group conference service providing method in a heterogeneous video communication network further comprising. The method according to any one of claims 1 to 3, When the H.324M terminal participates in the generated group conference, the H.324M terminal receives a group conference call termination request [Release, REL, Group conference withdrawal request] from the H.324M terminal through the relay of the MSC. Converting the group conference video call termination request of the 324M terminal into a by message [BYE] and transmitting the converted message to the AS; When the AS sends the group conference video call termination request [BYE] of the H.324M terminal received from the IMG to the MRC and receives a response message [200 OK] from the MRC, the response message [200 OK] is transmitted to the IMG. step; And Converting the response message [200 OK] received from the AS into an RLC message in the IMG and transmitting it to the MSC; Group conference service providing method in a heterogeneous video communication network further comprising. The method according to any one of claims 1 to 3, In the state where the H.323 terminal participates in the generated group conference, the IMG receives a group conference call termination request [group conference withdrawal request] from the H.323 terminal, and relays the H.323 terminal through a G / K relay. Converting the group conference video call termination request from the H.323 terminal into a BY message [BYE] when the group conference video call termination is notified from the mobile station; And When the AS delivers the group conference video call termination request [BYE] of the H.323 terminal received from the IMG to the MRC and receives the response message [200 OK] from the MRC, the response message [200 OK] is transmitted to the IMG. step Group conference service providing method in a heterogeneous video communication network further comprising. The method according to any one of claims 1 to 3, When the SIP terminal participates in the generated group conference, when the AS receives a group conference call termination request message [BYE, group conference leave request] from the SIP terminal through relaying of the MSS, the group conference call termination request is received. Forwarding the message [BYE] to MRC; And Forwarding the response message [200 OK] to the SIP terminal through the relay of MSS when the AS receives a response message [200 OK] for the group conference video call termination request message [BYE] from the AS. Group conference service providing method in a heterogeneous video communication network further comprising.

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