KR100493734B1 - System and Method for Video Telephony Inter-operation between Asynchronous and Synchronous Mobile Telecommunication network - Google Patents

Abstract

The present invention relates to a video telephone interworking system and method between the asynchronous network and the synchronous network of the IMT-2000, and an asynchronous network connected to the line network of the asynchronous network, including an asynchronous troubleshooter controlling ISUP signal processing with the synchronous network; A protocol conversion unit connected to the asynchronous troubleshooter to perform protocol conversion between the asynchronous network and the synchronous network, a signaling controller connected to the asynchronous troubleshooter to control the signal between the asynchronous troubleshooter and the synchronous network, and a gatekeeper, a video telephone server. In a synchronous network comprising a, when the calling terminal of the synchronous network performs the video call, the call path in the synchronous network for the calling terminal, the call path between the synchronous network and the receiving terminal of the asynchronous network, and the protocol conversion Video call transmission method from a synchronous network to an asynchronous network that connects a calling terminal and a called terminal through a mobile terminal, and a calling terminal of an asynchronous network. When a video call is made, a call path between the calling terminal and the protocol converter is set, the protocol converter and the guide server are connected to collect subscriber input information, and the call setup with the called terminal according to the collected subscriber input information is established. By performing the video call transmission method from the asynchronous network to the synchronous network as a connection step for connecting the calling terminal and the called terminal, it is possible to provide a video telephone interworking service between different networks.

Description

System and Method for Video Telephony Inter-operation between Asynchronous and Synchronous Mobile Telecommunication Network

The present invention relates to a video telephone interworking system and method between an asynchronous network and a synchronous network of IMT-2000.

Today, with the development of mobile telecommunications, the convenience and cost of mobile phones have decreased, making mobile phones a necessity of life, and the number of subscribers has exploded.

Such mobile communication service technologies can be broadly classified into asynchronous service environments centered on Europe and synchronous services centered on North America. In addition, the IMT-2000 service is evolving around North America and Europe as a new mobile communication technology standard for delivering packets at high speed.

Synchronous IMT-2000 service is evolving into CDMA2000 1x, CDMA2000 1x EV-DO, and asynchronous IMT-2000 service is evolving as WCDMA UMTS service.

The IMT-2000 service has a packet network that provides packet data, and provides various services to mobile terminals through packet data.

As the hardware technology of the mobile terminal is developed, the video telephony service is available in the mobile communication network. Therefore, the interworking of the video telephony service between the asynchronous network and the synchronous network is required for the video telephony that can be generalized in the future.

The present invention is to solve such a problem, an object of the present invention is to provide a video telephone interworking system and method between the asynchronous network and the synchronous network that can provide video telephone services between different networks of the IMT-2000.

The video telephone interworking system between the asynchronous network and the synchronous network according to the present invention for achieving the above object, the asynchronous network controller, the asynchronous network controller and the asynchronous network connected to the line network of the asynchronous network to control the connection between the asynchronous network and the synchronous network and A protocol conversion unit connected to the data core network to perform protocol conversion between the asynchronous network and the synchronous network, a signaling controller connected to the asynchronous problem controller and the data core network to control signals between the synchronous network and the asynchronous network, and a data core network A guide server for providing announcements and forwarding called numbers according to video telephony connections, a gatekeeper, a video telephony server connected to a data core network, and mobility for mobility management of a mobile terminal connected to a data core network. Characterized in that it comprises a manager.

In addition, the video telephone interworking method between the asynchronous network and the synchronous network according to the present invention is connected to the asynchronous network circuit, the asynchronous network including an asynchronous troubleshooter for controlling the ISUP signal processing with the synchronous network, and the asynchronous troubleshooter And a protocol conversion unit for performing protocol conversion between the asynchronous network and the synchronous network, a signaling controller connected to the asynchronous troubleshooter to control a signal between the asynchronous network and the synchronous network, and a gatekeeper, which is a video telephone server. In the video telephone interworking method between the synchronous network, when the calling terminal of the synchronous network performs a video call, the step of setting a synchronous network call path for setting the call path in the synchronous network for the calling terminal, the synchronous network and the asynchronous network Asynchronous network call path setting step of establishing a call path with a called terminal, the calling terminal through the protocol conversion unit And a method for transmitting a video call from a synchronous network to an asynchronous network, comprising a connection step for connecting a talker and a called terminal.

In addition, the video telephone interworking method between the asynchronous network and the synchronous network according to the present invention is connected to the asynchronous network circuit, the asynchronous network including an asynchronous troubleshooter for controlling the ISUP signal processing with the synchronous network, and the asynchronous troubleshooter A protocol conversion unit for performing protocol conversion between the asynchronous network and the synchronous network, a signaling controller connected to the asynchronous troubleshooter and controlling a signal between the asynchronous network and the synchronous network, and providing guide broadcasting according to a video telephone connection. And a guide server for performing a forwarding number and a synchronous network including a gatekeeper, which is a video telephone server, wherein the calling terminal and the protocol conversion unit are configured when the calling terminal of an asynchronous network performs video telephone transmission. Call path setting step of setting the call path with the protocol conversion unit and the guide server An asynchronous network comprising a connection and collection step of collecting particle input information, a call terminal setting step of performing call setup with a called terminal according to the collected subscriber input information, and an access step of connecting the calling terminal and the called terminal; It characterized in that it comprises a method for transmitting video calls to the synchronous network.

Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the present invention.

1 is a block diagram illustrating a video telephone interworking service according to the present invention.

Referring to FIG. 1, the video telephone interworking service according to the present invention includes an asynchronous IMT200 network (WCDMA, hereinafter referred to as asynchronous network) and a synchronous IMT-2000 network (CDMA2000 1x EV-DO, hereinafter referred to as a synchronous network). It is to link video call service between

The asynchronous network 100 includes a wireless station (hereinafter referred to as "RAN") 120 that performs wireless communication with the mobile terminal 110 and an exchanger (hereinafter referred to as "MSC") connected to the RAN 120 ( 130, and a circuit network 140 is connected to the MSC 130. The circuit network 140 is connected to a home location register (hereinafter referred to as 'HLR') 150 for managing subscriber information and an asynchronous relational problem controller (hereinafter referred to as 'CGS') 160.

On the other hand, the synchronization network 200 is a wireless data station (hereinafter referred to as "AN") 212 that performs wireless communication with the mobile terminal 211, and a packet data service connected to the AN (212) to provide a packet data service A node (hereinafter referred to as 'PDSN') 213 and a data core network (hereinafter referred to as 'DCN') 214 connected to the PDSN 213 are provided.

The DCN 214 includes a guide server (hereinafter referred to as 'IVR') 220 for providing a guide broadcast and a called number transmission, a mobility manager (hereinafter referred to as 'HA') 230 for managing mobility, and media. A related controller (hereinafter, referred to as 'MGC') 250, a gatekeeper (hereinafter referred to as 'GK') 250, and a signaling controller (hereinafter referred to as 'SG') 260 connected to the CGS 160 (hereinafter, referred to as 'SG') 260 ) And a protocol conversion unit (hereinafter referred to as "IMG") 270 that converts the protocol and is connected to the CGS 160.

2 is a block diagram illustrating a configuration of a gatekeeper GK according to the present invention. Referring to FIG. 2, the gatekeeper (GK) 250 includes a control unit 251 for operation control, a network connection unit 252 for connecting to the DCN 214, and a subscriber for managing subscriber information of a video phone. Database 253.

Hereinafter will be described the video phone interworking service method according to the present invention.

3 is a flowchart illustrating a video call transmission from a synchronous network to an asynchronous network according to the present invention.

3 illustrates a case where a video call is sent from an H.323 mobile terminal 211 of a synchronous network to an H.324M mobile terminal 110 of an asynchronous network.

Referring to FIG. 3, the mobile terminal 211 that intends to make a video call first performs a registration process. To this end, the mobile terminal 211 performs a registration request (RRQ) to the GK 250 (S11). Accordingly, the GK 250 transmits a registration confirmation message (RCF) according to the registration request (RRQ) to the mobile terminal 211 (S12) and registration is completed.

The mobile terminal 211 using the H.323 protocol performs an outgoing call for a video telephone call (S21). To this end, the mobile terminal 211 transmits an ARQ (Admission Request) message to the GK 250. The origination message is delivered to GK 250 via AN 212, PDSN 213 and DCN 214. Accordingly, the GK 250 receives an outgoing request from the originating terminal 211 and transmits an ACF (Admission Confirm) message to the originating terminal 211 to approve it (S22).

The mobile terminal 211 performs call setup by transmitting a call setup (H.225 call signaling setup) message to the GK 250 (S31), and the GK 250 sets up a call setup (H.225 call signaling). setup) transmits a message to IMG 270 to perform call setup, and IMG 270 transmits a message (sigtran) including a called number to SG 260 to perform call setup (S32).

The SG 260 transmits an IAM message to the CGS 160 which is an ISUP signal processing element of an asynchronous network (S33). Accordingly, the CGS 160 performs a call connection attempt to the mobile terminal 110, which is the called terminal (S34).

The mobile terminal 110 transmits a response to the call connection attempt to the CGS 160 (S41). The CGS 160 transmits a message (ANM) to the SG 260 of the synchronous network, and the SG 260 transmits a message (sigtran) according to the response from the asynchronous network to the IMG 270.

Accordingly, a call path is formed between the IMG 270 of the synchronous network and the mobile terminal 110 of the asynchronous network, which is the called terminal (S50). The IMG 270 performs level negotiation with the mobile station 110 for error recovery of the wireless section (S60).

The IMG 270 transmits and receives an access message (H.225 call signaling) to access the mobile terminal 211 of the synchronous network, which is the originating terminal (S70).

When the connection with the mobile terminal 211 is completed, the IMG 270 performs signal processing (H.245 signaling) for call setup between the mobile terminal 211 of the synchronous network and the mobile terminal 110 of the asynchronous network (S80). ).

Accordingly, a call path is formed between the mobile terminal 2110 of the synchronous network, which is the calling terminal, and the mobile terminal 110 of the asynchronous network, which is the called terminal, and a video telephone call is made (S90). It is connected to the GK 250 through, the GK 250 is connected to the mobile terminal 211 through the PDSN (213).

4A and 4B are flowcharts for explaining video call transmission from an asynchronous network to a synchronous network according to the present invention.

4A and 4B illustrate a case where a video call is transmitted from the H.324M mobile terminal 110 of the asynchronous network 100 to the H.323 mobile terminal 211 of the synchronous network 200.

The mobile terminal 110 transmits a preset representative number for a video telephone call with the mobile terminal 211 of the synchronous network (S111). The MSC 130 transmits the representative number sent in step S111 to the CGS 160, and the CGS 160 transmits a message IAM for ISUP signal processing to the SG 260 of the synchronous network (S112). The SG 260 of the synchronous network transmits the received message IAM on the signal sigtran to the IMG 270 (S113). The IMG 270 transmits the response to step S113 to the SG 260 (S114), and the SG 260 transmits an ANM message to the CGS 160 of the asynchronous network (S115).

Accordingly, a call path is formed between the mobile terminal 110 of the asynchronous network, which is the originating terminal, and the IMG 270 of the synchronous network for converting the protocol (S120). In addition, the mobile terminal 110 and the IMG 270 perform an agreement (H.223 level ngo.) About communication speed (S130).

After performing step S130, the mobile terminal 110 performs signal processing (H.245 signaling) for calling the mobile terminal 211 of the synchronous network, that is, the H.323 video terminal, to the IMG 270 (S141).

The IMG 270 of the synchronous network transmits an ARQ (Admission Request) message to the GK 250 (S142). Accordingly, the GK 250 receives an ARQ message and transmits an ACF (Admission Confirm) message to the IMG 270 (S143).

After receiving the acknowledgment message (ACF), the IMG 270 requests the connection of the IVR 220 by transmitting a setting message to the MGC 240 through the GK 250 (S144). Accordingly, the MGC 240 makes a connection request to the IVR 220 (S145), and the IVR 220 transmits a response message to the MGC 240 (S146).

After receiving the response message from the IVR 220, the MGC 240 transmits an access message (H.225 call signaling) to the IMG 270 through the GK 250 (S147). Accordingly, a call path is formed between the mobile terminal 110, which is an H.324M video terminal of an asynchronous network, and the IVR 220 of a synchronous network (S148).

The GK 250 requests a guide message for collecting the called number to the IVR 220 through the MGC 240 (S151). In response to the request in step S151, the IVR 220 transmits a guide message for requesting an incoming number to the mobile terminal 110, which is the calling terminal (S152).

The mobile terminal 110 transmits the number of the called terminal to which the video call is desired, that is, the called number, to the IVR 220 (S161). The IVR 220 collects the called number transmitted from the mobile terminal 110 and transfers the called number to the GK 250 (S162). Then, the call path between the IMG 270 and the IVR 220 is released (S170). At this time, only the call between the IMG 270 and the IVR 220 is released, and the call between the mobile terminal 110 and the IMG 270 is activated.

The GK 250 analyzes the called number received in step S162 from the subscriber database provided in the GK 250 and transmits a setting message to the mobile terminal 211 which is the called terminal according to the result and attempts to connect the call ( S181).

The mobile terminal 211 receives the setup message and transmits a request message (ARQ) for call connection to the GK 250 (S182). GK 250 receives the request message (ARQ) and transmits another acknowledgment message (ACF) to the mobile terminal 211 (S183). The GK 250 transmits a connection message indicating the call connection to the mobile terminal 211 (S184).

Accordingly, a call path may be formed between the mobile terminal 110 of the asynchronous network using the H.324M protocol, which is the calling terminal, and the mobile terminal 211 of the synchronous network, using the H.323 protocol, which is the called terminal. (S190).

As described in detail above, according to the video telephone interworking system and method between the asynchronous network and the synchronous network according to the present invention, there is an effect that can provide a video telephone interworking service between the asynchronous network and the synchronous network of the IMT-2000.

1 is a block diagram illustrating a video telephone interworking according to the present invention;

2 is a block diagram illustrating a configuration of a gatekeeper according to the present invention;

3 is a flowchart illustrating a video call transmission from a synchronous network to an asynchronous network according to the present invention;

4A and 4B are flowcharts for explaining video call transmission from an asynchronous network to a synchronous network according to the present invention.

<Description of Symbols for Main Parts of Drawings>

100: asynchronous network (WCDMA) 110: mobile terminal

120: RAN 130: MSC

140: circuit 150: HLR

160: CGS 200: Synchronous Network (CDMA2000 1xEV-DO)

211: mobile terminal 212: AN

213: PDSN 214: DCN

220: IVR 230: HA

240: MGC 250: GK

251 control unit 252 network connection unit

253: Subscriber database 260: SG

270: IMG

Claims (13)

In an interworking system between an asynchronous network and a synchronous network including a data core network, An asynchronous troubleshooter which controls the connection between the asynchronous network and the synchronous network and is connected to the circuit network of the asynchronous network, A protocol conversion unit connected to the asynchronous problem controller and a data core network to perform protocol conversion between the asynchronous network and a synchronous network; A signaling controller connected to the asynchronous troubleshooter and a data core network to control signals between the synchronous network and asynchronous; A guide server connected to the data core network and configured to provide guide broadcasting and call forwarding according to a video call connection; A gatekeeper, which is a videophone server connected to the datacore network, And a mobility manager for mobility management of a mobile terminal connected to the data core network. The method of claim 1, The gatekeeper includes a control unit for operation control, a network connection unit for connecting to the data core network, and a subscriber database for managing subscriber information of a video telephone. system. An asynchronous network connected to a circuit network of an asynchronous network and including an asynchronous problem controller for controlling ISUP signal processing with a synchronous network, and a protocol conversion unit connected to the asynchronous problem controller to perform protocol conversion between the asynchronous network and a synchronous network And a signaling controller connected to the asynchronous troubleshooter to control a signal between the asynchronous network and a synchronous network, and a synchronous network including a gatekeeper as a video telephone server. A step of setting a synchronous network call path for setting a call path in the synchronous network for the calling terminal when the calling terminal of the synchronous network performs a video call; Setting an asynchronous network call path for establishing a call path between the synchronous network and the called terminal of the asynchronous network; And a video telephone transmission method from a synchronous network to an asynchronous network, comprising a connection step of connecting the calling terminal and the called terminal through the protocol conversion unit. The method of claim 3, wherein The setting of the synchronous network call, When the calling terminal performs a video call, a gatekeeper approves this, a first setting step of performing call setup between the calling terminal and the gatekeeper according to the approval, and a call between the gatekeeper and the protocol conversion unit. And a second setting step of performing the setting, and transmitting a message including the number of the called terminal from the protocol conversion unit to the signaling controller. The method of claim 4, wherein And the calling terminal is connected to the gatekeeper by any one of a preset address or a multicast method. The method of claim 4, wherein In the acknowledgment step, the gatekeeper transmits an acknowledgment message including the address of the called terminal according to the subscriber information to the calling terminal, and the calling terminal receives the acknowledgment message and performs the first setting step through the H.225 message. The video phone interworking method between the asynchronous network and the synchronous network, characterized in that performing. The method of claim 3, wherein The setting of the asynchronous network call path may include: performing a call connection between the asynchronous troubleshooter and a called terminal of an asynchronous network according to a connection request message transmitted from the signaling controller, and the asynchronous troubleshooter responds from the called terminal. Receiving a message and transmitting a response according to the connection request message to the signaling controller, And said signaling controller transmits a message in response to a response from said asynchronous troubleshooter to a protocol conversion unit. The method of claim 3, wherein The connecting step may include: performing a radio segment level negotiation between the protocol converter and a called terminal with respect to a communication path formed with the called terminal; and, after negotiation of the radio segment level, an H.225 protocol from the protocol converter to the originating terminal. And transmitting an access message through the protocol, and performing a H.245 protocol signal processing from the protocol converter to the called terminal to form a call path between the calling terminal and the called terminal. Video Phone Interworking Method between Synchronous Networks. An asynchronous network connected to a circuit network of an asynchronous network and including an asynchronous problem controller for controlling ISUP signal processing with a synchronous network, and a protocol conversion unit connected to the asynchronous problem controller to perform protocol conversion between the asynchronous network and a synchronous network And a signaling controller connected to the asynchronous problem controller to control a signal between the asynchronous network and a synchronous network, a guide server for providing a guide broadcast and a called number transmission according to a videophone connection, and a gatekeeper, a videophone server. In the video phone interworking method between the synchronization network comprising a, A call path setting step of setting a call path between the calling terminal and the protocol conversion unit when the calling terminal of the asynchronous network performs a video call; An access and collection step of accessing the protocol conversion unit and the guide server to collect subscriber input information; A called terminal call setting step of performing call setup with a called terminal according to the collected subscriber input information; And a video telephone transmission method from an asynchronous network to a synchronous network, comprising a connection step of connecting the calling terminal and the called terminal. The method of claim 9, The call setting step, Forming a call path between the calling terminal and the protocol converter according to the video call from the calling terminal, and performing H.245 signaling for calling the called terminal after negotiating a communication speed between the calling terminal and the protocol converter; Video telephony interworking method between an asynchronous network and a synchronous network comprising a. The method of claim 9, The access and collection step, The protocol conversion unit obtains information from the gatekeeper and connects to the guide server through a media problem controller, forms a call between the calling terminal and the guide server, and the guide server transmits the calling terminal according to a request from the gatekeeper. And a step of sending a guide message to the mobile station, and collecting subscriber input information transmitted from the calling terminal according to the guide message. The method of claim 9, The called terminal call setting step, And transmitting the collected subscriber input information from the guide server to the gatekeeper, and performing call setup between the called terminal and the gatekeeper corresponding to the subscriber input information. How to link video calls. The method of claim 12, And transmitting the subscriber input information to the gatekeeper, releasing the communication path between the protocol conversion unit and the guide server after the transfer.