KR100880144B1 - Method and system for supporting wire/wireless video telephone by interlocking database of subscriber - Google Patents

Abstract

The present invention provides a method for providing wired / wireless video telephony according to the determination of the video support capability of the calling and receiving terminals in providing voice and video telephony between mobile (2G / 3G) networks, PSTN networks, and VoIP networks. It's about the system. In particular, the present invention relates to a method and system for providing a wired / wireless video telephone using a subscriber database interworking using terminal information extracted from a subscriber database of the mobile network in determining whether the video support capability is available. In a method of providing a wired / wireless video call using a subscriber database interworking according to the present invention, receiving a part-time message for a called terminal of a predetermined called network capable of interworking with the VoIP network from a VoIP terminal of a VoIP network, Determining whether the destination network is a mobile network including a 3G network; when the destination network is a mobile network, an analysis of the invite message and a routing method of the invite message is determined using a subscriber database of the mobile network; And performing routing according to the determined routing scheme.

Wired, wireless, videophone, routing, call setup, subscriber database

Description

METHOD AND SYSTEM FOR SUPPORTING WIRE / WIRELESS VIDEO TELEPHONE BY INTERLOCKING DATABASE OF SUBSCRIBER}

1 is a view showing an overview of a method and system for providing a wired / wireless video telephone using a subscriber database interworking according to an embodiment of the present invention.

2 is a flowchart illustrating a wire / wireless video telephone providing method using subscriber database interworking according to an embodiment of the present invention.

3 is a diagram illustrating a routing process of an invite message received from a VoIP terminal of a VoIP network according to an embodiment of the present invention.

4 is a block diagram illustrating a system for providing a wired / wireless video telephone using a subscriber database interworking according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

121: intelligent exchange equipment

131: mutual repeater

152: video gateway

161: mobile network subscriber database

400: wired / wireless video telephone system

The present invention relates to a method and system for providing a wired / wireless telephone for providing a telephone service between a mobile communication network, a VoIP network, and a PSTN network.

Recently, with the continuous evolution of communication networks, various wired / wireless communication networks such as WCDMA network (IMS Domain: IP Multimedia System Domain), WCDMA network (CS Domain: Circuit System Domain), and VoIP network, in addition to legacy communication networks such as conventional PSTN network, etc. This is being provided. These various communication networks can be broadly divided into packet-based packet networks and circuit-based circuit networks. WCDMA networks (IMS Domain: IP Multimedia System Domain) and VoIP networks can be included in the packet networks, and WCDMA networks (CS Domain: Circuit System Domain) and PSTN network may be included in the circuit network.

Due to the emergence of such various communication networks, the interworking of the respective communication networks is required, and various methods for interworking for voice calls have already been proposed. In addition, due to the recent development of the media and securing technology, video and data communication are rapidly increasing in addition to voice communication, and such video and data communication methods are required in addition to the voice communication in each of the various communication networks. In response, various video and data communication methods have been proposed.

However, there is a shortage of related technologies in connection with call setup control and communication protocol according to voice, video and data communication between the various communication networks. In particular, 3G terminals are dominant in mobile networks, and wireless video mobile terminals are rapidly appearing in packet networks. Therefore, the necessity for developing video communication technologies among the various communication networks has been highlighted.

In particular, in communication with existing 2G terminals, VoIP terminals that do not support video telephony, telephone terminals in the PSTN network, and 3G terminals that support video telephony, there is no dynamic communication method depending on whether video telephony is supported. It is becoming.

In order to solve this problem, in performing routing in an exchange for controlling the connection of the various communication networks, a method of determining whether to support video capability of a called terminal by performing a plurality of routings may be provided. The determination method according to the present invention does not know whether the incoming call is a 3G or 2G subscriber in advance, so efficient routing cannot be performed, and if it is not an actual 3G subscriber, there is a problem of increasing the call setup time, which may be inefficient.

In accordance with the problems of the prior art, it is determined whether the mobile terminal and the VoIP terminal is a terminal that supports the video call, and further determine whether the call to the telephone terminal of the PSTN network, dynamic communication method in various cases There is a need for a method and system for providing a wired / wireless video telephone.

The present invention has been made to solve the problems of the prior art as described above, by a method and system for providing wired / wireless video telephony using a subscriber database interworking, a predetermined network capable of interworking with the VoIP network from a VoIP terminal of a VoIP network. Receiving an invite message for a called terminal of a called network, determining whether the called network is a mobile network including a 3G network, and if the called network is a mobile network, analyzing the invite message and The VoIP terminal determines the routing scheme of the invite message using the subscriber database of the mobile network, and performs routing according to the determined routing scheme, thereby reducing call setup time without depending on a plurality of routings. Video and voice calls between mobile terminals and telephone terminals of PSTN network To provide for that purpose.

In order to achieve the above object and to solve the above-mentioned problems of the prior art, a method for providing a wired / wireless video call using a subscriber database interworking according to an embodiment of the present invention is interworking with the VoIP network from a VoIP terminal of a VoIP network. Receiving an invite message for a called terminal of a predetermined called network; determining whether the called network is a mobile network including a 3G network; if the called network is a mobile network, the invite Analyzing the message and determining a routing scheme of the invite message using a subscriber database of the mobile network; and performing routing according to the determined routing scheme.

According to one aspect of the invention, the step of determining whether the destination network is a mobile network comprises the step of determining whether the destination network is a mobile network by Prefix analysis of the invite message.

According to another aspect of the present invention, the step of determining the routing method of the invite message is based on the bearer capability of the VoIP terminal analyzed from the invite message and the terminal information of the called terminal extracted from the subscriber database of the mobile network. And determining a routing scheme of the invite message.

According to another aspect of the invention, the step of determining the routing method of the invite message according to the bearer capability of the VoIP terminal and the terminal information of the called terminal whether the bearer capability of the VoIP terminal is video / voice and the incoming call And determining a routing scheme of the invite message differently depending on whether the terminal is a 3G / 2G terminal.

According to another aspect of the present invention, the step of determining the routing method of the invite message differently depending on whether the bearer capability of the VoIP terminal is a video / voice and whether the destination terminal is a 3G / 2G terminal. determining whether the bearer capability is an image, determining whether the called terminal is a 3G terminal when the bearer capability is an image, and when the called terminal is a 3G terminal, the invitee Determining the routing scheme to transmit a message to a video gateway (VG) and if the bearer capability is voice or the destination terminal is a 2G terminal as a result of the determination, the invite message is transmitted to a voice gateway (TG). Determining the routing scheme to transmit to a trunk gateway.

In another embodiment of the present invention, there is provided a wired / wireless video telephone call providing system using a subscriber database interworking system, including: a receiving unit for receiving an invite message for a called terminal of a predetermined called network capable of interworking with the VoIP network; Determining unit for determining whether the destination network is a mobile network including a 3G network, if the destination network is a mobile network, the determination of the invite message using the analysis of the invite message and the subscriber database of the mobile network And a determining unit determining a routing scheme of the processor and an performing unit performing routing according to the determined routing scheme.

Terminals widely used in the present specification is a code division multiplexing access (CDMA) module, a Bluetooth module, an infrared ray, such as a wired telephone, a personal digital assistant (PDA), a smart phone, a handheld PC, a mobile phone, and the like. A communication terminal equipped with a predetermined communication module such as a communication module (IrDA), a wired / wireless LAN card, and equipped with a predetermined microprocessor, has a predetermined computing power, and H.323, SIP, MGCP (Media Gateway Control Protocol), Megaco, etc. A generic term for IP terminals that support VoIP related protocols.

MSC (Mobile Switching Center) widely used herein is an example of a mobile switch that is the heart of a mobile communication system that controls the entire mobile network, IGS (Interconnection Gateway System) widely used in the present specification is between the different communication networks It may be an example of a mutual repeater to relay the connection of.

Soft switch (SSW) widely used in the present specification is an example of intelligent switching equipment that controls call processing and sessions in a VoIP network, and a video gateway (VG) widely used in the present specification is an IP packet network (VoIP, etc.). ) Is an example of a device that provides a PSTN / PLMN exchanger and a TDM-based physical video call path, and a widely used voice gateway (TG) is a PSTN exchanger and a TDM-based physical voice in a VoIP network. It may be an example of an apparatus for providing a call path.

Home location register (HLR) widely used herein may be an example of a mobile subscriber database having terminal information, subscription information, location information, authentication function, and the like in a wireless communication exchange.

The MSC, IGS, SSW, video gateway, voice gateway, and HLR are names used for easy understanding of the present invention. Accordingly, the invention is not to be construed as limited or limited to the present invention.

In addition, although the preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings and the contents described in the accompanying drawings, the present invention is not limited or restricted by the embodiments.

1 is a view showing an overview of a method and system for providing a wired / wireless video telephone using a subscriber database interworking according to an embodiment of the present invention.

As shown, the wired / wireless video telephony providing system provides a video / voice telephone service between a WCDMA network (IMS Domain: IP Multimedia System Domain), a WCDMA network (CS Domain: Circuit System Domain), a VoIP network and a PSTN network. The interworking plan between each network can be suggested. The VoIP network is a data communication packet network that has been used in the past for an Internet phone, and is a communication service network that enables a call in a general telephone network by converting video / audio data into an Internet protocol data packet. The user may receive a communication service through the video / audio VoIP terminal 122 connected to the VoIP network. The WCDMA network (IMS Domain) is connected to a wireless IP terminal 112 including a SIP / H.323 video terminal, and the user provides a wireless communication service in a packet-based IP communication area through the WCDMA network (IMS Domain). Can be provided. The VoIP network is a communication service network using a packet network together with the VoIP network. If the VoIP network is a service network for a wired terminal, the WCDMA network (IMS Domain) may be a service network for a wireless terminal. In general, however, the VoIP network may be used to include all packet network services.

The WCDMA network (CS Domain) is connected to a mobile terminal 132 such as a 3G terminal and a 2G terminal including a 3G-324M terminal, the user through the WCDMA network (CS Domain) is a circuit-based wireless mobile communication service Can be provided. CDMA is one of the US standard technologies used in digital mobile phones using spread-band technology, and the user distinguishes using the PN code of the user communication channel. The PSTN network is a public telephone switching network operated by a public telecommunication service provider, and the PSTN network may be connected to a wired telephone 141 to provide a communication service to a user.

The video telephone providing method is made by an intelligent exchange equipment 121 that operates as a wired / wireless video telephone providing system using the subscriber database interworking. The intelligent switching equipment 121 receives a predetermined outgoing call from the VoIP terminal 122, which is the originating terminal, and analyzes the received outgoing signal and interworks with the mobile network subscriber database 161. And routing between call 142 and call setup.

The VoIP network and WCDMA network (IMS Domain) are packet-based communication networks, and the mobile network and WCDMA network (CS Domain) are circuit-based communication networks. A gateway is needed between a packet network and a circuit network having different types of transmission signals so that two different networks can be mutually converted to transmit information. The wired / wireless videophone providing method according to the present invention may include video gateways 151 and 152 and voice gateway 153 for compatibility between the packet network and the circuit network. In particular, the video gateways 151 and 152 may operate as a compatible device for video telephony between the packet network and the circuit network, and the video gateways 151 and 152 may include a call control signal mapping unit and a bearer control signal mapping unit. And a media mapping unit.

In connection with a circuit network including a repeater 131, the call control signal mapping unit may use H.323 and session initiation protocol (SIP), and the bearer control signal mapping unit is H.245 and SIP (SDP). ) And the media mapping unit may use IP Stream (RTP / RTCP). In addition, in connection with a packet network including the intelligent switching equipment 121, the call control signal mapping unit may use ISUP and Q.931, and the bearer control signal mapping unit may use H.245 / H223. The media mapping unit may use a TDM stream (H.223 MUX).

The H.323 and SIP may be a signaling protocol of an application layer in which intelligent terminals to communicate on a communication network identify each other, find a location thereof, and specify a procedure for creating or deleting a multimedia communication session with each other. ISUP is the ITU-T NO. 7 means a user part of a signaling method, and Q.931 may be an ITU-T recommendation that defines a call establishment procedure in an ISDN user-network interface. In addition, the H.245 and SIP (SDP) may be one of the protocols used in the circuit network, H.245 / H223 in the packet network.

Call State Control Function (CSCF) 111 may include a function that is responsible for the part related to call and session processing, and may perform a bridge role for connecting the video telephone system and the WCDMA network (IMS Domain), The exchange 141 may control a connection between the PSTN network and the video telephone system.

In conclusion, the video telephone system may provide a video / voice telephone communication service between at least one network which may be divided into a circuit network / packet network or a wired / wireless unit. The telephone system determines a routing scheme, performs routing according to the routing scheme, sets up a call by performing the routing, allocates a communication channel between a predetermined calling terminal and a called terminal included in the at least one network, and performs a communication service. Can be provided.

Hereinafter, a method and system for providing a wired / wireless video telephone according to an embodiment of the present invention will be described in more detail with reference to FIGS. 2 to 4.

2 is a flowchart illustrating a wire / wireless video telephone providing method according to an embodiment of the present invention. In an embodiment of the present invention, a VoIP terminal may be a mobile terminal (2G / 3G) and a telephone terminal connected to a PSTN network as a calling terminal. The mobile terminal may be a 3G terminal or a 2G terminal. As shown, the wired / wireless video telephone providing method using subscriber database interworking may be performed in steps S201 to S207.

In step S201, the wired / wireless video telephone providing system may receive an invite message for a destination terminal of a predetermined destination network that can interwork with the VoIP network from a VoIP terminal of a VoIP network. VoIP is a communication technology capable of making calls over the Internet, and uses a packet network for data communication, which has been used in the past, for Internet phones. A communication service technology that converts voice data into Internet protocol data packets to enable communication over a general telephone network. The VoIP network is a communication network including equipment and terminals for providing such a VoIP service, and protocols used in the VoIP network may include H.323, SIP, MGCP, and MEGACO. In addition, the VoIP network may be used as a concept including a wired network and a wireless network. A terminal used in a VoIP network is called a VoIP terminal, and the VoIP terminal includes a wired terminal including an H.323 / SIP video terminal and a SIP / H. A wireless terminal including a 323 video terminal may be included.

The called network may mean a communication network to which a terminal of a called party to which a user wants to talk belongs, and the terminal used in the called network is a called terminal. In an embodiment of the present invention, the called network may be a mobile network including a 2G terminal and a 3G terminal, and may be a PSTN network including a wired telephone. The invite message is a predetermined call received from the VoIP terminal, and may include bearer capability information of the VoIP terminal and various kinds of information on the called terminal.

In step S202, the video telephone system may determine whether the called network is a mobile network including a 3G network. In order to determine whether the destination network is a mobile network, Prefix analysis of the invite message may be used. The mobile network may mean a communication network for the purpose of communication between mobiles such as trains, ships, etc. and between the mobile body and the outside of the mobile body, but may generally mean a mobile communication service network by a mobile phone terminal. The mobile network may include a 3G network and a 2G network, and the 3G is an International Telecommunication Union (ITU) standard applied to third generation devices in the development of mobile communication, and includes a first generation analog cellular phone and a second generation. It appeared after the generation of digital PCS phones. In the 3G, the transmission speed is much faster than that of the existing 2G, and the video can be exchanged. Accordingly, various color contents such as music videos, internet broadcasts, and news may be provided to the 3G terminal, and further, video call services may be supported. The 3G network in the present invention may mean a mobile communication service network including a 3G terminal capable of video telephony. The 3G terminal may include a 3G-324M.

Prefix analysis may be a method of identifying the called network by determining what is an identification number assigned to a user who receives a service by the called network. In the case of Korea, since the initial three digits of the subscriber number provided to the mobile network are in the format of 01X, the initial three digits of the subscriber number of the called terminal subscriber can be determined by analyzing the invite message received from the calling terminal. When the initial three digits are 01X, the called network is a mobile network. Since the invite message may include identification number information of the called terminal subscriber, the prefix analysis is possible.

As a result of determining whether the called network is a mobile network including a 3G network by the video telephone system in step S202, when the called network is a mobile network, the video telephone system may perform step S203. If the destination network is identified as a PSTN network by Prefix analysis of the invite message, the video telephone system transmits the invite message to a Trunk Gateway (TG) in step S205. Can be determined.

In step S203, the video telephone system may determine what bearer capability of the VoIP terminal is by analyzing the invite message, and may determine whether the bearer capability of the VoIP terminal is video / audio. In more detail, the invite message may include bearer capability information, and the video telephone system reads the invite message to display the bearer capability information when the originating VoIP terminal is a video telephone capable terminal. If the originating VoIP terminal is a video call impossible terminal, the bearer capability information may be determined as a voice mode.

As a result of determining whether the bearer capability of the VoIP terminal is a video by the video telephone system in step S203, when the bearer capability of the VoIP terminal is a video, the video telephone system may perform step S204. If the bearer capability of the VoIP terminal is voice, the video telephone system may determine the routing scheme to transmit the invite message to the voice gateway in step S205.

In step S204, the video telephone system may determine whether the called terminal is a 3G terminal. The 3G terminal in the present invention may mean an image support terminal. In operation S204, the video telephone system may determine whether the called terminal is a 3G terminal by referring to terminal information extracted from the subscriber database of the mobile network. The subscriber database may include identification number information, terminal information, and subscriber information for the subscriber of the mobile network.

As a result of determining whether the called terminal is a 3G terminal by the video telephone system in step S204, if the called terminal is a 3G terminal, the video telephone system sends the invite message to the video gateway (S205). VG: Video Gateway (VG) may determine the routing scheme, and if the called terminal is not a 3G terminal, the video telephone system in step S205 performs the routing scheme to send the invite message to the voice gateway. You can decide.

According to the results determined by the video telephone system in steps S202, S203 and S204, the video telephone system may determine different routing methods in step S205.

The determination result in step S202 is that the called network is a mobile network, the determination result in step S203 is the bearer capability of the VoIP terminal is an image, and the determination result in step S204 is that the called terminal is a 3G terminal. The routing scheme may be determined to transmit the invite message to a video gateway (VG).

If the destination network is a mobile network as a result of the determination in step S202, and the bearer capability of the VoIP terminal is voice as a result of the determination in step S203, the invite message is transmitted to a trunk gateway (TG). The routing scheme can be determined to

The determination result in step S202 is that the called network is a mobile network, the determination result in step S203 is the bearer capability of the VoIP terminal, and the determination result in step S204 is that the called terminal is not a 3G terminal. In this case, the routing scheme may be determined to transmit the invite message to a voice gateway (TG).

According to another embodiment of the present invention, the determination result in step S202 is that the called network is a mobile network, and as a result of determination in step S203, the bearer capability of the VoIP terminal is an image, and in step S204 If it is determined that the called terminal is a 3G terminal, the invite message is transmitted to a video gateway (VG), and the video gateway transmits an initial address message (IAM) corresponding to the received invite message. ) Is transmitted to an Interconnection Gateway System (IGS), the mutual repeater transmits an initial address message received from the video gateway to a mobile switching center (MSC), and the mobile exchanger from the mutual repeater The routing scheme may be determined to transmit the received initial address message to the called terminal.

According to another exemplary embodiment of the present invention, if the called network is a mobile network as a result of the determination in step S202, and the bearer capability of the VoIP terminal is voice, the invite message is determined. To a voice gateway (TG), the voice gateway transmits an initial address message corresponding to the received invite message to a toll exchange, and the toll exchanger receives an initial message received from the voice gateway. Send an address message to a mutual relay, wherein the mutual relay transmits an initial address message received from the toll exchanger to a mobile exchange, and the mobile exchange sends the initial address message received from the mutual relay to the called terminal. The routing scheme can be determined.

The determination result in step S202 is that the called network is a mobile network, the determination result in step S203 is the bearer capability of the VoIP terminal, and the determination result in step S204 is that the called terminal is not a 3G terminal. When the invite message is transmitted to a voice gateway (TG), the voice gateway transmits an initial address message corresponding to the received invite message to a toll exchange, and the toll exchanger Sends an initial address message received from a voice gateway to a mutual relay, the mutual relay sends an initial address message received from the toll exchanger to a mobile exchange, and the mobile exchange sends the initial address message received from the mutual relay to the mobile relay. The routing scheme may be determined to transmit to the called terminal.

According to another embodiment of the present invention, when the incoming network is identified as the PSTN network by Prefix analysis of the invite message in step S202, the video telephone system sends the invite message in step S205. The routing scheme may be determined to transmit to the voice gateway unconditionally.

According to another embodiment of the present invention, in step S205, when the called network is identified as the PSTN network by the Prefix analysis, the video telephone system unconditionally transmits the invite message to the voice gateway, The voice gateway sends an initial address message corresponding to the received invite message to a toll exchanger, and the toll exchanger sends a ringing message corresponding to the initial address message received from the voice gateway to the called terminal. The routing scheme can be determined.

Routing (routing) is the basic process of determining which path to send a signal from the source to the destination. The routing is used not only in the telephone network, which requires circuit configuration from the source to the destination, but also in the packet network, which must determine the link to transmit for the arriving packet. That is, in an embodiment according to the present invention, in the embodiment in which the calling terminal is a VoIP terminal and the called terminal is a mobile terminal connected to a mobile (2G / 3G) terminal and a PSTN network, the routing is based on call setup and communication channel assignment. This is a must before. This step (S205) will be described in more detail later with reference to FIG.

In step S206, the video telephone system may perform routing according to the determined routing scheme. According to each of the three routing methods determined in step S205, the video telephone system may perform routing. Performing the routing may mean completing routing of the routing scheme, and may also include completing call setup according to the routing scheme. That is, in the present invention, the concept of performing routing and call establishment is described separately, but according to another embodiment of the present invention, the routing and call establishment may be performed together. However, if you look closely, since the call setup requires a call setup response signal transmission process in addition to the call setup request signal transmission process from the originating terminal to the called terminal according to the routing according to the routing, the same as the present invention May be necessary.

In step S207 the video telephone system is After the call setup is completed according to the routing, the call channel may be allocated between the 3G terminal and the called terminal with reference to the call setup. For a call according to the call channel assignment, the video telephone system uses RTP / RTCP, which is an IP stream, for a call in a packet network including the VoIP network, and includes a mobile network and a PSTN network. H.223 MUX, a TDM stream, can be used to make a call from.

Connection of the different communication channels may be made by the video gateway and the voice gateway. A gateway is a device that converts two different networks so that they can transfer information interchangeably. A gateway is a network point that acts as an entrance to another network. Accordingly, the video gateway may be used to connect the circuit network and the packet network by a video telephone, and the voice gateway may be used to connect the circuit network and the packet network by a voice telephone.

3 is a diagram illustrating a routing process of an invite message received from a VoIP terminal 301 of a VoIP network according to an embodiment of the present invention. The video telephone system receiving the invite message may determine three routing methods as described above. The direction of the signal according to each routing scheme is shown as 310 to 330. If the called network is a mobile network, the bearer capability of the calling terminal is a video, and the called terminal is a 3G terminal, according to the moving direction of 310, the video telephone system is a video gateway, a mutual repeater, a mobile switchboard, and a mobile terminal. At 302, an invite message, an initial address message (IAM), and a setup (SETUP) message may be transmitted in stages.

The video telephone system extracts the terminal information of the subscriber from the subscriber database of the mobile network through the connection with the subscriber database of the mobile network and determines whether the terminating terminal is a 3G terminal by referring to the terminal information. The mobile switchboard is the heart of the mobile communication system that controls the entire mobile network system. The mobile switchboard can serve as a central control function to process signals originating and incoming from each mobile phone base station and to efficiently operate the mobile phone base station. have. The mutual repeater may serve to relay a connection between a mobile network and the VoIP network, and the video gateway converts a video signal between the VoIP network and the mobile network, which are divided into a circuit network and a packet network as described above. You can perform the connection.

If the called network is a mobile network and the bearer capability of the calling terminal is voice or the bearer capability of the calling terminal is video, but the called terminal is a video unsupported terminal, the video telephone system according to 320 proceeds. An invite message, an initial address message (IAM), and a setup (SETUP) message may be transmitted step by step to the voice gateway, toll exchanger, mutual relay, mobile exchange, and mobile terminal 302. As described above, the voice gateway may perform voice signal conversion connection between the VoIP network and the mobile network, which are divided into a circuit network and a packet network, and the toll exchanger is a PSTN network or VoIP with an exchange included in the PSTN network. It is used for voice call between network and mobile network.

If the called network is a PSTN network, the video telephone system transmits a voice message, an initial address message (IAM) to the voice gateway, a toll exchanger, a local exchange, and a telephone terminal 303 according to the advancing direction of 330. A ringing message can be sent in stages. The local exchange may be an exchange included in the PSTN network.

The invite message, the initial address message, the setup message, and the ringing message are named differently according to the classification of the circuit network or the packet network, and in the present invention, they are separately used for understanding the understanding transmission scheme. Collectively referred to as a call setup request message or an outgoing call, the above four types of messages may be used.

The routing process as shown in FIG. 3 is expressed with respect to the call establishment request signal for convenience of description. However, the routing may mean only path allocation for the call setup request signal (including an invite message, an initial address message, and a setup message), and further, a call setup response signal corresponding to each call setup request signal. It may also mean including routing. The call setup response signal may include a 200 OK, 18X, an Answer Message (ANM) and an Address Complete Message (ACM).

4 is a block diagram illustrating a system for providing a wired / wireless video telephone using a subscriber database interworking according to an embodiment of the present invention. As shown in FIG. 4, the wire / wireless video telephone providing system 400 may include a receiver 401, a determiner 402, a determiner 403, and a performer 404.

In one embodiment of the present invention, the reception unit 401 may receive an invite message for a destination terminal of a predetermined destination network interoperable with the VoIP network from a VoIP terminal of the VoIP network, and the determination unit 402 The receiver may determine whether the destination network is a mobile network including a 3G network, and if the destination network is the mobile network as a result of the determination, the determination unit 403 may analyze the invite message and the subscriber database of the mobile network. The routing method of the invite message may be determined by using the second message, and the execution unit 404 may perform routing according to the determined routing method.

The determination unit 402 may determine whether the destination network is a mobile network by Prefix analysis of the invite message.

The determination unit 403 determines a routing decision unit for determining the routing method of the invite message according to the bearer capability of the VoIP terminal analyzed from the invite message and the terminal information of the called terminal extracted from the subscriber database of the mobile network. It may include. The routing determination unit determines a routing determination unit that determines the routing method of the invite message differently depending on whether the bearer capability of the VoIP terminal is video / audio and whether the called terminal is a 3G / 2G terminal. It may include. The bearer determination unit determines whether the bearer capability of the VoIP terminal is an image, and when the bearer capability is an image, when the bearer capability is an image, the called terminal is referred to by referring to terminal information extracted from the subscriber database of the mobile network. A called terminal determining unit determining whether the called terminal is a 3G terminal, a 3G determining unit determining the routing scheme to transmit the invite message to a video gateway (VG) when the called terminal is a 3G terminal; As a result of the determination, when the bearer capability is voice or the called terminal is not a 3G terminal, the bearer capability may include a 2G determination unit that determines the routing scheme to transmit the invite message to a voice gateway (TG). .

If the destination network is not the mobile network as a result of the determination, the video telephone system 400 identifies the destination network by Prefix analysis of the invite message, and further determines an identification determination unit that determines a routing scheme according to the identification result. It may include. The identification determination unit may include a PSTN identification determination unit that determines the routing scheme to transmit the invite message to the voice gateway when the destination network is identified as the PSTN network by the prefix analysis.

The video telephone system 400 may further include a communication channel allocator configured to allocate a call channel between the 3G terminal and the called terminal with reference to the call setup after completing call setup according to the routing.

The wired / wireless video telephone providing method using subscriber database interworking according to the present invention may be implemented in the form of program instructions that can be executed by various computer means and recorded in a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. Program instructions recorded on the media may be those specially designed and constructed for the purposes of the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks. Magneto-optical media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like. The hardware device described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

As described above, although the present invention has been described with reference to limited embodiments and drawings, the present invention is not limited to the above embodiments, and those skilled in the art to which the present invention pertains various modifications and variations from such descriptions. This is possible.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims below but also by the equivalents of the claims.

According to the present invention, a method and system for providing a wired / wireless video call using a subscriber database interworking method receives a part-time message for a destination terminal of a predetermined destination network capable of interworking with the VoIP network from a VoIP terminal of a VoIP network. It is determined whether the destination network is a mobile network including a 3G network, and when the determination result indicates that the destination network is a mobile network, analysis of the invite message and routing method of the invite message using a subscriber database of the mobile network And by performing the routing according to the determined routing scheme, there is no plural routing is performed, so that efficient routing can be performed by reducing the call setup time, it is possible to bring profits to the operator by providing a video call service , The user also receive a stable video call service It can bring about effects.

Claims (19)

Receiving an INVITE message for a called terminal of a predetermined called network capable of interworking with the VoIP network from a VoIP terminal of a VoIP network; Determining whether the destination network is a mobile network using the invite message; In response to the determination that the destination network is a mobile network, it is determined whether the VoIP terminal and the destination terminal are video supporting terminals by using the invite message analysis and the subscriber database of the mobile network. Determining a routing scheme to transmit the invite message to the video gateway when the determination result is a video support terminal; And Performing routing according to the determined routing scheme Wire / wireless video call providing method comprising a. The method of claim 1, The step of determining whether the destination network is a mobile network, Determining whether the called network is a mobile network by prefix analysis of the invite message; Wire / wireless video call providing method comprising a. The method of claim 1, The step of determining the routing scheme, Determining whether the VoIP terminal and the called terminal are video supporting terminals according to the bearer capability of the VoIP terminal analyzed from the invite message and the terminal information of the called terminal extracted from the subscriber database of the mobile network; Determining, in the case of the video support terminal, a routing scheme to transmit the invite message to the video gateway; Wire / wireless video call providing method comprising a. The method of claim 3, The step of determining the routing scheme, Characterized in that it is determined whether the VoIP terminal and the called terminal are video supporting terminals according to whether the bearer capability of the VoIP terminal is video / audio and whether the called terminal is a 3G / 2G terminal as a result of identifying the terminal information. How to provide wired / wireless video call. The method of claim 4, wherein The step of determining the routing scheme, Determining whether a bearer capability of the VoIP terminal is an image; If the bearer capability is an image, determining whether the called terminal is a 3G terminal by referring to terminal information extracted from the subscriber database of the mobile network; Determining the routing scheme to transmit the invite message to a video gateway when the called terminal is a 3G terminal; And Determining the routing scheme to transmit the invite message to a voice gateway when the bearer capability is voice or the called terminal is not a 3G terminal. Wire / wireless video call providing method comprising a. The method of claim 4, wherein The step of determining the routing scheme, Determining whether a bearer capability of the VoIP terminal is an image; Determining whether the called terminal is a 3G terminal when the bearer capability is an image; In response to the determination that the called terminal is a 3G terminal, the invite message is transmitted to the video gateway, and the video gateway sends an initial address message (IAM) corresponding to the received invite message to a mutual relay. And the mutual relay transmits an initial address message received from the video gateway to a mobile exchange, and the mobile exchange determines the routing scheme to transmit an initial address message received from the mutual relay to the called terminal. ; And If the bearer capability is voice or the called terminal is not a 3G terminal, the determination result transmits the invite message to a voice gateway, and the voice gateway installs an initial address message corresponding to the received invite message. (Toll) to the exchange, the toll exchange sends the initial address message received from the voice gateway to the mutual repeater, the mutual repeater sends the initial address message received from the toll exchange to the mobile exchange, the mobile The exchange determining the routing scheme to send an initial address message received from the mutual relay to the called terminal; Wire / wireless video call providing method comprising a. The method of claim 1, If the destination network is not a mobile network, determining the destination network by Prefix analysis of the invite message, and determining a routing scheme according to the identification result Wire / wireless video call providing method further comprising. The method of claim 7, wherein The step of identifying the destination network by Prefix analysis of the invite message, and determining the routing scheme according to the identification result, Determining the routing scheme to send the invite message to a voice gateway unconditionally when the called network is identified as a PSTN network by the prefix analysis; Wire / wireless video call providing method comprising a. The method of claim 7, wherein The step of identifying the destination network by Prefix analysis of the invite message, and determining the routing scheme according to the identification result, When the destination network is identified as the PSTN network by the prefix analysis, the invite message is unconditionally transmitted to the voice gateway, and the voice gateway transmits an initial address message corresponding to the received invite message to the toll exchanger. Determining, by the toll exchanger, the routing scheme to send a ringing message corresponding to the initial address message received from the voice gateway to the destination terminal. Wire / wireless video call providing method comprising a. The method of claim 1, Assigning a call channel between the VoIP terminal and the called terminal with reference to the call setting after completing call setup according to the routing; Wire / wireless video call providing method further comprising. A computer-readable recording medium in which a program for executing the method of any one of claims 1 to 10 is recorded. A receiving unit for receiving an invite message for a destination terminal of a predetermined destination network interoperable with the VoIP network from a VoIP terminal of a VoIP network; A determination unit which determines whether the destination network is a mobile network using the invite message; In response to the determination that the destination network is a mobile network, it is determined whether the VoIP terminal and the destination terminal are video supporting terminals by using the invite message analysis and the subscriber database of the mobile network. A determination unit for determining a routing scheme to transmit the invite message to an image gateway when the determination result is a video support terminal; And Execution unit performing routing according to the determined routing scheme Wired / wireless video call providing system comprising a. The method of claim 12, The determination unit, Wire / wireless video telephone providing system, characterized in that for determining whether the incoming network is a mobile network by Prefix analysis of the invite message. The method of claim 12, The determination unit, Determining whether the VoIP terminal and the called terminal are video supporting terminals according to the bearer capability of the VoIP terminal analyzed from the invite message and the terminal information of the called terminal extracted from the subscriber database of the mobile network; As a result of the determination, in the case of the video support terminal, a routing determination unit that determines a routing scheme to transmit the invite message to the video gateway. Wired / wireless video call providing system comprising a. The method of claim 14, The routing determination unit, A routing determination determination unit that determines whether the VoIP terminal and the called terminal are video supporting terminals according to whether the bearer capability of the VoIP terminal is video / audio and whether the called terminal is a 3G / 2G terminal as a result of identifying the terminal information. Wired / wireless video call providing system comprising a. The method of claim 15, The routing determination determiner, A bearer determination unit to determine whether the bearer capability of the VoIP terminal is an image; A called terminal determining unit determining whether the called terminal is a 3G terminal by referring to terminal information extracted from the subscriber database of the mobile network when the bearer capability is an image as a result of the determination; A 3G determining unit for determining the routing scheme to transmit the invite message to the video gateway when the called terminal is a 3G terminal; And The 2G determination unit determines that the routing scheme to transmit the invite message to the voice gateway when the bearer capability is voice or the called terminal is not a 3G terminal. Wired / wireless video call providing system comprising a. The method of claim 12, If the destination network is not the mobile network as a result of the determination, an identification determination unit for identifying the destination network by Prefix analysis of the invite message, and determines the routing scheme according to the identification result Wired / wireless video call providing system further comprising. The method of claim 17, The identification determination unit, PSTN identification determination unit for determining the routing scheme to send the invite message to the voice gateway when the destination network is identified as a PSTN network by the prefix analysis Wired / wireless video call providing system comprising a. The method of claim 12, A communication channel assignment unit for allocating a call channel between the VoIP terminal and the called terminal with reference to the call setting after completing call setup according to the routing Wired / wireless video call providing system further comprising.

Images