KR101612787B1 - Communication control apparatus, system and method thereof - Google Patents

Abstract

The present invention relates to a communication control device, a system, and a method capable of minimizing inconvenience caused by a conference interruption by performing a call transfer to another terminal registered in advance in a specific terminal during a video conference service provision. In order to achieve the above object, according to an aspect of the present invention, there is provided a communication control apparatus including a storage unit for storing identification information of a first terminal and a second terminal, a communication unit for transmitting and receiving signals to and from the first and second terminals, And a controller for performing call transfer from the first terminal to the second terminal through the communication unit with reference to the identification information when a failure is detected in the first terminal when call setup is in progress or completed from the service server.

Video conferencing, transfer, priority

Description

[0001] COMMUNICATION CONTROL APPARATUS, SYSTEM AND METHOD THEREOF [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication control device, a system and a method thereof, and more particularly to a device for controlling connection of a video conference service, a system including such a device, and a communication control method in such an apparatus or system. will be.

2. Description of the Related Art Generally, when a failure occurs in a specific terminal, such as a severe deterioration in the quality of a video and / or voice call due to an abnormality of a network or a terminal during provision of a video conference service according to the related art, The conference is interrupted until it is connected. In this case, it is inconvenient that other conference attendees can not conduct a conference while obtaining the connection number of another terminal of the terminal user who has a failure, so that the users feel frustration and consequently, the effectiveness of the video conference itself is deteriorated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a method and apparatus for detecting a failure before and after connection of each terminal participating in a video conference at the time of conducting a video conference, The present invention also provides a communication control device, system, and method for minimizing time cost due to interruption of a conference and allowing a conference to proceed efficiently.

The present invention also provides a method and apparatus for performing a call transfer in a plurality of different terminals registered in advance with respect to a terminal having a failure in accordance with the priority order, The present invention also provides a communication control device, system, and method that can quickly and stably prepare for a failure.

According to an aspect of the present invention, there is provided a communication control apparatus including a storage unit for storing identification information of a first terminal and a second terminal, a communication unit for transmitting and receiving signals to and from the first and second terminals, do. Wherein the controller refers to the identification information when a failure is detected in the first terminal when call setup is in progress or completed from the video conferencing service server, and transfers the call from the first terminal to the second terminal through the communication unit.

In a preferred embodiment, the storage further stores identification information of the third terminal and priority information between the second and third terminals, and the control unit controls the second or third terminal according to the priority information when the failure is detected, And transfers the call from the first terminal to the second terminal or the third terminal through the communication unit with reference to the identification information of the third terminal.

Wherein the control unit determines that the call setup is not completed within a predefined time from the server to the first terminal or that the quality of the video and / or voice call transmitted and received from the server to the first terminal is lower than a predefined criterion It is preferable to determine that the fault has occurred when it falls.

Preferably, the controller receives a signal from the first or second terminal to register the second terminal as a call transfer target of the first terminal, and stores the identification information for the second terminal in the storage unit do.

According to another aspect of the present invention, there is provided a communication control system including a server for providing a video conferencing service, a first terminal and a second terminal connected to the server for receiving the video conferencing service, . The communication control apparatus includes a storage unit for storing identification information of the first and second terminals, a communication unit for transmitting and receiving signals to and from the first terminal and the second terminal, And a controller for performing a call transfer from the first terminal to the second terminal through the communication unit by referring to the identification information when a failure is detected in the first terminal.

In a preferred embodiment, the communication control system further includes a third terminal connected to the server and provided with the video conferencing service, wherein the storage unit stores identification information of the third terminal, And the control unit refers to the identification information of the second or third terminal according to the priority information when the failure is detected and transmits the priority information to the second or third terminal Transfers the call to the terminal.

And the controller determines that the failure has occurred when the call setup is not completed within a predefined time from the server to the first terminal. The first terminal measures the quality of the video and / or voice call transmitted and received from the server to the first terminal at a predetermined period and transmits the measured quality to the communication control device, The quality of the video and / or voice call is received from the terminal and it is determined that the failure has occurred when the quality of the video and / or voice call falls below a predefined criterion.

Preferably, the first or second terminal transmits to the communication control device a signal for registering the second terminal as a call transfer target of the first terminal, and the control unit transmits, via the communication unit, Or receives the signal from the second terminal and stores the identification information for the second terminal in the storage unit.

According to another aspect of the present invention, there is provided a communication control method of a communication control device or a communication control system for detecting a failure of a video conference and performing call transfer. First, it detects from the video conferencing service server whether a failure has occurred in the first terminal that is in the process of call set-up or has been completed. And then confirms the identification information of the first terminal and the second terminal. Finally, referring to the identification information, the first terminal transitions the call to the second terminal.

In confirming the identification information, the identification information of the third terminal and the priority information between the second and third terminals are further checked. When performing the call transfer, the second or third terminal To the second or third terminal from the first terminal with reference to the identification information of the second terminal or the third terminal.

In detecting the failure, the call setup is not completed within a predefined time from the server to the first terminal, or the quality of the video and / or voice call transmitted from the server to the first terminal is predefined It is also preferable to determine that the fault has occurred when it falls below the reference.

In a preferred embodiment, a signal for registering the second terminal as a call transfer target of the first terminal is received from the first or second terminal before the failure is detected, and the identification information for the second terminal .

According to the present invention, when a failure occurs in a specific terminal during the video conference, the call can be transferred to another terminal registered in advance, and the call can be automatically transferred according to the priority when there is a plurality of registered terminals have. Accordingly, it is possible to minimize the time wasted during the interruption of the video conference due to the occurrence of the trouble. In particular, the inconvenience of finding out the connection number of another terminal to replace the terminal in which a failure occurs is reduced. Therefore, convenience and efficiency of video conference are maximized.

Hereinafter, when the quality of a video and / or voice call is seriously deteriorated due to a malfunction of a terminal or a network during a video conference service, or when a connection is not established or a failure occurs, Preferred embodiments of the communication control device, the system and the method for performing the same will be described in detail with reference to Figs. 1 to 8. Fig.

1 is a configuration diagram of a communication control system according to an embodiment of the present invention. In this embodiment, the system includes a gatekeeper 100, terminals 200-1 and 200-2, a multipoint control unit 300, a gateway 400, a packet network 510, A General Switched Telephone Network (GSTN) 520, and an Integrated Services Digital Network (ISDN) 530.

Gatekeeper 100 provides address translation and control of access to the network for terminals 200-1 and 200-2, MCU 300, and gateway 400. The gatekeeper 100 may also provide other services such as bandwidth management of the terminals 200-1 and 200-2, the MCU 300 and the gateway 400 and locating the gateway 400 .

The gatekeeper 100 performs an address conversion function for converting a telephone number into an IP address. Also, the gatekeeper 100 grants network access using an H.225.0 message of an ARQ (Admission Request) / ACF (Admission Confirm) / ARJ (Admission Reject). Also, the gatekeeper 100 manages the bandwidth using a BRQ (Bandwidth Change Request) / BRJ (Bandwidth Change Reject) / BCF (Bandwidth Change Confirm) message. The function of the gatekeeper 100 may be provided to the registered terminals 200-1 and 200-2, the MCU 300, and the gateway 400 (zone management).

According to the present invention, the gatekeeper 100 is capable of performing call set-up from other terminals serving as terminals of the video conferencing service, that is, the MCU 300 or the video conferencing service server, Lt; / RTI > The gatekeeper 100 refers to a terminal (hereinafter referred to as a second terminal, 200-2) that is a call forwarding target by referring to identification information of a terminal (hereinafter referred to as a first terminal, 200-1) And performs call transfer from the first terminal 200-1 to the second terminal 200-2.

Preferably, the gatekeeper 100 identifies the other terminal (hereinafter referred to as a third terminal 200-2) that is the object of the call transfer when the failure is detected in the first terminal 200-1, 3 terminal 200-2 can be confirmed. Also, the gatekeeper 100 performs call transfer from the first terminal 200-1 to the second or third terminal 200-2 according to the information on the priorities of the second and third terminals 200-2 Can be implemented. Specifically, the gatekeeper 100 first tries to perform a call transfer from the first terminal 200-1 to a terminal having a higher priority, and when the call transfer fails, the call is transferred to the terminal having a lower priority The transfer of the call is carried out in such a way that

Also, preferably, the gatekeeper 100 receives call setup information from the MCU 300 or another terminal serving as a video conference service server within a predefined time period of the first terminal 200-1 in which call set- It can be determined that the first terminal 200-1 has failed. Alternatively, the gatekeeper 100 may transmit video and / or audio data to and from the first terminal 200-1, which has been set up in the call setup and is provided with the video conferencing service, from the MCU 300 or another terminal serving as the video conferencing service server When the quality of the call drops below a predefined criterion, the first terminal 200-1 may determine that a failure has occurred.

The gatekeeper 100 transmits a signal for registering the second terminal 200-2 from the first terminal 200-1 or the second terminal 200-2 to the first terminal 200-1 And may store the identification information of the second terminal 200-2 as a call transfer target of the first terminal 200-1.

The terminals 200-1 and 200-2 provide real-time, bidirectional communication with the other terminals 200-1 and 200-2, the MCU 300, or the gateway 400. [ This communication includes control signals, audio, video and / or data between the two terminals 200-1 and 200-2. The terminals 200-1 and 200-2 may support audio, audio and data, video and data, or audio, video and data.

The audio signal includes digitized and coded audio. The audio signal is accompanied by an audio control signal. The video signal includes digitized and coded motion video. The video signal is accompanied by a video control signal. Data signals include still pictures, facsimiles, documents, computer files and other data streams.

According to the present invention, the terminals 200-1 and 200-2 are connected to a video conference service server and are provided with a video conference service. Preferably, each of the terminals 200-1 and 200-2 measures the quality of video and / or audio communication transmitted and received from the video conferencing service server during a predetermined period of time while receiving the video conferencing service, . The gatekeeper 100 judges that a failure has occurred in the first terminal 200-1 when the received quality falls below a predefined criterion and the second terminal or the third terminal 200-2).

Preferably, the first terminal 200-1 or the second terminal 200-2 transmits a signal for registering the second terminal 200-2 as a call transfer target of the first terminal 200-1, Keeper 100. The gatekeeper 100 receives the signal for registration as a call transfer target and transmits the identification information of the second terminal 200-2 as the call transfer target of the first terminal 200-1 Can be stored.

The MCU 300 provides the capability for the three or more terminals 200-1 and 200-2 and the gateway 400 to participate in a multi-point conference. The MCU 300 may also connect the two terminals 200-1 and 200-2 at a point-to-point meeting, which may later develop into a multi-point conference. The MCU 300 essentially includes a Multipoint Controller (MC), and may further include an MP (Multipoint Processor). In other words, the MCU 300 can be composed of only the MC without the MP.

The MC provides control of more than three terminal participants in a multi-point conference. The MC can also connect two terminals at a point-to-point meeting, which can later develop into a multi-point conference. The MC provides capability negotiation with all terminals to achieve a common level of communication. The MC can also control conferencing resources such as who is multicasting video. MC does not perform mixing or switching of audio, video and data.

The MP provides centralized processing of audio, video and / or data streams in multi-point conferences. The MP provides mixing, switching, or other processing of the media stream under the control of the MC. The MP can process a single media stream or multiple media streams depending on the type of conference supported.

The gateway 400 provides real-time, bi-directional communication between the terminals on the packet network 510 and other terminals on the GSTN 520 or ISDN 530 or other gateways 400.

The packet network 510 may be constructed as a LAN (Local Area Network) or a WAN (Wide Area Network) without a gateway 400 using a packet switched network.

The GSTN (Generalized Switched Telephone Network) 520 is also used in the same sense as the Public Switched Telephone Network (PSTN), which means a public switched telephone network.

ISDN (Integrated Services Digital Network) 530 is a communication service that enables a comprehensive communication of voice, text, and video using a digital communication network, including N-ISDN (Narrow-band Integrated Services Digital Network) B-ISDN (Broadband Integrated Services Digital Network).

The GSTN 520 and the ISDN 530 are connected to the packet network 510 through the gateway 400.

2 is a detailed block diagram of the gatekeeper 100 shown in FIG. In this embodiment, the gatekeeper 100 includes a storage unit 110, a communication unit 120, and a control unit 130.

The storage unit 110 includes a ROM (Read Only Memory) for storing a program for the operation of the controller 130, for example, a flash memory, and a random access memory (RAM) for storing temporary output data processed for transmission / Memory).

According to the present invention, the storage unit 110 stores identification information of the terminals 200-1 and 200-2. The identification information includes the IDs of the terminals 200-1 and 200-2, a telephone number, an IP address, a call transfer registration state, and an ID of a call transfer target terminal. On the other hand, when there are a plurality of transfer destination terminals, the transfer destination terminal further includes information on priorities of the plurality of transfer destination terminals.

4A and 4B, FIG. 4A shows a field configuration of the identification information table of the terminal. The identification information table 610 in FIG. 4A is composed of a terminal ID 611, a telephone number 613, an IP address 615, a call transfer registration 617, and a call transfer target terminal ID 619 field.

4B shows a field configuration of the identification information table and the priority information table of the terminal. The identification information table 620 shown in FIG. 4B is a table of the terminal ID 621, the telephone number 623, the IP address 625, the call transfer registration 627 and the priority information table ID 629 of the call transfer target terminal . In addition, the priority information table 630 of FIG. 4B is composed of a priority 631 and a transfer-destination terminal ID 633 field.

In addition, the storage unit 110 may store the time reference for the execution of call setup from the video conferencing service server to the first terminal 200-1 and the time reference for the video transmitted from the video conferencing service server to the first terminal 200-1 and / It stores quality criteria for voice calls. The time and quality criteria are used by the controller 130 to detect a failure of the first terminal 200-1.

The communication unit 120 transmits and receives signals to and from the first terminal 200-1 and the second terminal 200-2 through the packet network 510. [ According to the present invention, the control unit 130 performs call transfer from the first terminal 200-1 to the second terminal or the third terminal 200-2 through the communication unit 120. [ The control unit 130 may transmit the second terminal 200-2 from the first terminal 200-1 or the second terminal 200-2 to the first terminal 200-1 through the communication unit 120. [ And receives a signal for registration as a call transfer target. Also, preferably, the controller 130 receives the quality of the video and / or voice call measured from the first terminal 200-1 through the communication unit 120. [

The controller 130 detects a failure of the first terminal 200-1 and transitions the call to the second terminal or the third terminal 200-2. The control unit 130 may transmit the second terminal 200-2 from the first terminal 200-1 or the second terminal 200-2 to the first terminal 200-1 through the communication unit 120, Receives a signal for registering as a call transfer target of the call transfer destination, and processes the call transfer target registration. The control unit 130 includes a main control unit 132, a registration processing unit 134, a failure processing unit 136, and a connection processing unit 138.

The main control unit 132 controls the operations of the storage unit 110 and the communication unit 120 with other components in the control unit 130. [

The registration processing unit 134 manages the identification information of the terminals 200-1 and 200-2. And manages the identification information of the terminal to be transferred to the first terminal 200-1. To this end, the registration processing unit 134 includes an identification information management unit 134-1 and a priority management unit 134-2.

The identification information management unit 134-1 manages identification information on terminals included in a zone managed by the gatekeeper 100. [ The identification information management unit 134-1 also manages the identification information of each terminal of the call transfer target terminal. According to the present invention, the identification information management unit 134-1 manages the identification information on the second terminal 200-2 together with the identification information on the first terminal 200-1 under the control of the main control unit 132 do.

The priority management unit 134-2 manages priority information for each of a plurality of terminals when there are a plurality of terminals to be converted in the first terminal 200-1. According to the present invention, the priority management unit 134-2 may include a second terminal and a second terminal when a plurality of terminals to be converted for the first terminal 200-1 are the second terminal and the third terminal 200-2. And manages priority information for the third terminal 200-2.

The identification information and the priority information managed by the identification information management unit 134-1 and the priority management unit 134-2 are stored in the storage unit 110 under the control of the main control unit 132. [

The failure processing unit 136 detects failures of the terminals 200-1 and 200-2 and selects a transfer target terminal for a terminal that has failed. To this end, the fault handling unit 136 includes a fault detection unit 136-1 and a call transfer target selection unit 136-2.

The failure detection unit 136-1 detects whether the call setup is completed within a predefined time from the video conferencing service server to the first terminal 200-1 or whether the call setup / It is determined that the quality of the video and / or voice call falls below a predefined criterion. If the call setup is not completed within a predefined time or the quality falls below a predefined criterion, it is determined that a fault has occurred .

Preferably, the first terminal 200-1 may be a quality measuring unit. Accordingly, the first terminal 200-1 may measure the quality of a video and / or a voice call transmitted and received from the video conference service server To the failure detection unit 136-1 at a predefined period. In this case, the failure detection unit 136-1 compares the quality of the video and / or voice call received from the first terminal 200-1 through the communication unit 120 with a predefined criterion to determine whether a failure has occurred Can be determined.

The quality of the video and / or voice call is determined by the packet loss rate, which is the loss rate occurring during data packet transmission after normal call connection, the end-to-end unidirectional delay for the packet from the transmitting terminal to the receiving terminal, Variable jitter, and the like.

When the failure detection unit 136-1 determines that a failure has occurred in the first terminal 200-1, the call transfer target selection unit 136-2 determines whether or not the failure of the identification information table 610 stored in the storage unit 110 And confirms whether or not the first terminal 200-1 registers the call transfer from the registration 617 field. When the first terminal 200-1 is registered for call transfer, the call transfer target selection unit 136-2 selects the call transfer target terminal ID 619 field of the identification information table 610 stored in the storage unit 110 And identifies the identification information on the call transfer target terminal of the first terminal 200-1.

Preferably, when the first terminal 200-1 is call-transferred registered and the first terminal 200-1 has a plurality of call-switching destinations, the call-switching-target selecting unit 136-2 selects the storage unit 110 The identification information on the terminal of the first terminal 200-1 to be transferred according to the identification information table 620 and the priority information table 630 stored in the first terminal 200-1. Specifically, the call transfer target selection unit 136-2 selects the terminal having the highest priority among the call transfer target terminals of the first terminal 200-1 as the call transfer target terminal. Thereafter, when the transfer processing unit 138 fails to transfer the call to the terminal having the highest priority, the transfer destination selection unit 136-2 selects the terminal having the next highest priority as the transfer destination.

The connection processing unit 138 sets up the call to the terminals 200-1 and 200-2 and the second terminal 200-1 selected from the first terminal 200-1 to the first terminal 200-1, 2). To this end, the connection processing unit 138 includes a call setup processing unit 138-1 and a call transfer processing unit 138-2.

The call setup processing unit 138-1 handles call set-up between the MCU 300 or a terminal serving as a video conference service server and a terminal to receive a video conference service, that is, a terminal for participating in a video conference service. In the H.323-based video conferencing service, the call setup process may not go through the gatekeeper 100, and in this case, the call setup process may be performed by the MCU 300 or a terminal acting as a video conferencing service server, May be performed directly between the terminal to be provided, that is, the terminal for participating in the video conference service.

The call transfer processing unit 138-2 shifts the call from the first terminal 200-1 to the second terminal 200-2 selected by the call transfer target selection unit 136-2. Specifically, the call-transfer processing unit 138-2 receives the call connection request from the MCU 300 or the terminal serving as the video conferencing service server by the failure detection unit 136-1 to the first terminal 200-1 When it is detected that the call set-up is not completed within the predetermined time, the MCU 300 or the first terminal 200-1 ) And relays the call set-up to the second terminal 200-2.

In addition, the call-transfer processing unit 138-2 may receive the video and / or video transmitted / received from the MCU 300 or the terminal serving as the video conferencing service server to the first terminal 200-1 by the failure detection unit 136-1, Or when it is detected that the quality of the voice call falls below a predefined criterion, the call setup with the first terminal 200-1 is terminated according to the selection result of the call transfer target selection unit 136-2, (300) or a terminal serving as a video conference service server to the second terminal (200-2).

3 is a block diagram of a terminal according to an embodiment of the present invention. In this embodiment, the terminal 200 includes a communication unit 210, an A / V input unit 220, a user input unit 230, an output unit 240, a storage unit 250, an interface unit 260, And a power supply unit 280.

The communication unit 210 performs a modulation / demodulation and encoding / decoding operation of a signal transmitted / received between the terminal 200 and the gatekeeper 100, another terminal, the MCU 300, and the gateway 400. Signals exchanged between the terminal 200 and the gatekeeper 100, another terminal, the MCU 300, and the gateway 400 include control signals, audio, video, and / or data.

The A / V input unit 220 is for inputting an audio signal or a video signal. The A / V input unit 220 includes a camera 222 and a microphone 224. The camera 222 processes image frames such as still images or moving images obtained by the image sensor in the video communication mode or the photographing mode. The processed image frame may be displayed on the display unit 242 and stored in the storage unit 250 or may be transmitted to the outside through the communication unit 210. [

The microphone 224 receives an external sound signal by a microphone in a communication mode, a recording mode, a voice recognition mode, or the like, and processes it as electrical voice data. In the communication mode, the processed voice data can be converted into a form that can be transmitted to the video conferencing service network through the communication unit 210 and output. The microphone 224 may be implemented with various noise reduction algorithms for eliminating noise generated in the process of receiving an external sound signal.

The user input unit 230 accepts an input command applied by the user for controlling the operation of the terminal 200 and transmits the received command to the controller 270 so that the controller 270 operates according to the command. The user input unit 230 may include a key pad dome switch, a touch pad (static / static), a jog wheel, a jog switch, and the like. Particularly, when the touch pad has a mutual layer structure with the display unit 242, it can be called a touch screen.

The output unit 240 is for outputting an audio signal or a video signal. The output unit 240 may include a display unit 242 and an audio output module 244.

The display unit 242 displays information to be processed by the terminal 200 and outputs the information. For example, when the terminal 200 is in the call mode, a UI (User Interface) or a GUI (Graphic User Interface) associated with a call is displayed. When the terminal 200 is in the video communication mode or the photographing mode, the captured image and / or the received image or UI and GUI are displayed.

The display unit 242 may be a liquid crystal display, a thin film transistor-liquid crystal display, an organic light-emitting diode, a flexible display, a three-dimensional display 3D display). Also, there may be two or more display units 242 according to the embodiment of the terminal 200. For example, the terminal 200 may be provided with an external display unit (not shown) and an internal display unit (not shown) at the same time.

(Hereinafter, referred to as a 'touch screen') in which the display unit 242 and a sensor (hereinafter, referred to as 'touch sensor') that detects the touch operation form a mutual layer structure, It can also be used as an input device. The touch sensor may have the form of, for example, a touch film, a touch sheet, a touch pad, or the like.

The touch sensor may be configured to convert a change in a pressure applied to a specific portion of the display portion 242 or a capacitance occurring in a specific portion of the display portion 242 to an electrical input signal. The touch sensor can be configured to detect not only the position and area to be touched but also the pressure at the time of touch. If there is a touch input to the touch sensor, the corresponding signal (s) is sent to a touch controller (not shown). The touch controller processes the signal (s) and transmits corresponding data to the controller 270. Thus, the control unit 270 can know which area of the display unit 242 is touched or the like.

The sound output module 244 outputs audio data received from the communication unit 210 or stored in the storage unit 250 in a call signal reception mode, a call mode or a recording mode, a voice recognition mode, and a broadcast reception mode. In addition, the sound output module 244 outputs an acoustic signal related to functions (e.g., call signal reception sound, message reception sound, etc.) performed in the terminal 200. [ The sound output module 244 may include a speaker, a buzzer, and the like.

The storage unit 250 includes a ROM (Read Only Memory) for storing a program for the operation of the controller 270, for example, a flash memory and a random access memory (RAM) for temporarily storing data to be processed for transmission, Memory). According to the present invention, the storage unit 250 includes an operating system, a client program for receiving a video conferencing service, various application programs related to the video conferencing service, quality of video and / or voice call of the quality measuring unit 274, Save the measurement period. The storage unit 250 may further include various CODECs for signal processing of the video and / or audio data transmitted and received through the communication unit 210.

The interface unit 260 serves as an interface with all the external devices connected to the terminal 200. For example, the interface unit 260 may include a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, a port for connecting a device equipped with the identification module, An input / output (I / O) port, a video I / O (input / output) port, and an earphone port. Here, the identification module is a chip storing various information for authenticating the usage right of the terminal 200, and includes a user identification module (UIM), a subscriber identity module (SIM), a general user authentication module (Universal Subscriber Identity Module: USIM), and the like. The device having the identification module (hereinafter referred to as 'identification device') can be manufactured in a smart card format. Accordingly, the identification module can be connected to the terminal 200 through the port. The interface unit 260 receives data from an external device or receives power from the external device and transmits the received data to each component in the terminal 200 or allows data in the terminal 200 to be transmitted to an external device.

The interface unit 260 may be a path through which power from the cradle is supplied to the terminal 200 when the terminal 200 is connected to an external cradle or various command signals input from the cradle by the user are transmitted to the terminal 200. [ As shown in FIG. Various command signals or power from the cradle may be operated as a signal for recognizing that the terminal 200 is correctly mounted on the cradle.

The control unit 270 typically controls the overall operation of the terminal 200. For example, the control unit 270 performs related control and processing for voice call, data communication, video call, and the like. In addition, the controller 270 may include a multimedia module 272 for multimedia playback. The multimedia module 272 may be implemented in the control unit 270 or may be implemented separately from the control unit 270.

According to the present invention, the controller 270 may further include a quality measuring unit 274 for measuring the quality of a video and / or a voice call transmitted to and / or received from the terminal 200. The quality measuring unit 274 may measure the quality of the video and / or voice call transmitted to and received from the mobile terminal 200 through the communication unit 210 at a predefined period stored in the storage unit 250. The control unit 270 transmits the measured quality to the gatekeeper 100 through the communication unit 210. [

The power supply unit 280 receives external power and internal power under the control of the controller 270 and supplies power necessary for operation of each component.

5 is a flowchart illustrating a communication control process according to an embodiment of the present invention. The communication control process includes a step of detecting a failure in a terminal (S100), a step of checking whether a failure has occurred (S150), a step S200 of confirming a terminal to which a failure has occurred, The method comprising the steps of: confirming whether a terminal selected as a call transfer target of a terminal having a failure exists in step S250, transferring the call transfer from the terminal where the failure has occurred to the terminal of the terminal where the failure occurred, (Step S350).

Referring first to FIG. 6A, there is shown a flowchart illustrating in detail a step S100 for detecting a fault according to the first embodiment of the present invention.

The main control unit 132 receives the call setup message from the MCU 300 or the terminal serving as the video conference server to the connection target terminal and transfers the call setup message to the call setup processing unit 138-1 of the connection processing unit 138 ). The call setup processing unit 138-1 transmits a call setup message to the main control unit 132 and the main control unit 132 transmits the received call setup message to the connection target terminal through the communication unit 120 at step S112.

The main control unit 132 receives a call procedure, an ARQ, an Alerting and / or a Connect message from the connection target terminal through the communication unit 120, Unit 136-1. The failure detection unit 136-1 determines whether the message is normally received within a predetermined time, that is, whether call setup is normally performed (S113).

If the call set-up from the MCU 300 or the terminal serving as the video conferencing server to the connection target terminal is normally performed in step 113, the failure detection unit 136-1 determines that there is no obstacle in the call setup for the connection target terminal (S114). On the other hand, if the call set-up from the MCU 300 or the terminal serving as the video conferencing server to the connection target terminal is not normally performed in operation 113, the fault detection unit 136-1 detects the call It is determined that the set-up is faulty (S115).

Next, referring to FIG. 6B, there is shown a flowchart illustrating in detail the step of detecting a fault (S100) according to the second embodiment of the present invention.

The failure detection unit 136-1 checks the quality of voice and / or video calls transmitted to and received from each terminal under the control of the main control unit 132. [ However, according to the embodiment in which the quality of voice and / or video call is confirmed at each terminal, each terminal confirms the quality of voice and / or video call transmitted and received to each terminal and transmits it to the gatekeeper 100. The failure detection unit 136-1 of the gatekeeper 100 receives and confirms the quality of the voice and / or video call through the communication unit 120 under the control of the main control unit 132 (S121).

The failure detection unit 136-1 determines whether the quality of the confirmed voice and / or video call falls below a predefined reference stored in the storage unit 110 (S122).

If the quality of the confirmed voice and / or video call falls below a predefined criterion in step 122, the failure detection unit 136-1 determines that there is a failure in the terminal that transmits and / or receives the voice and / or video call (S123). On the other hand, if the quality of the confirmed voice and / or video call does not fall below a predefined criterion in step 122, the failure detection unit 136-1 detects the presence of a voice and / It is determined that there is no obstacle (S124).

Next, referring to FIG. 7, there is shown a flowchart illustrating in detail a step S200 of selecting a call transfer target terminal according to an embodiment of the present invention.

5, the main control unit 132 determines whether or not there is a failure through step 115 of FIG. 6A or step 123 of FIG. 6B, 2).

The transfer destination selection unit 136-2 receives the transfer destination selection command from the main control unit 132 and responds to the transfer destination selection command in response to the identification information table 610 or 620 of FIG. 4A or FIG. 4B stored in the storage unit 110, (617 or 627) of the first terminal (200-1) in which the failure occurred (step S211).

In step 211, when the first terminal 200-1 is registered for call transfer, the call transfer target selection unit 136-2 determines whether a call transfer target terminal exists. That is, the call transfer target selection unit 136-2 selects the priority information table 630 according to the identification information table 610 of FIG. 4A or the priority information table ID field 629 of the identification information table 620 of FIG. (S212). ≪ / RTI > If there is no call transfer target terminal, the call transfer target selection unit 136-2 notifies the main control unit 132 that the call transfer terminal has not been selected (S214).

In step 212, when there is a transfer destination terminal, the transfer destination selection unit 136-2 determines whether or not there is a priority information table ID field of the identification information table 610 of FIG. 4A or the identification information table 620 of FIG. (S213) whether there are a plurality of terminals registered in the priority information table 630 according to the priority information table 629. If the number of registered terminals is not plural, the call transfer target selection unit 136-2 selects the registered terminal as the call transfer target terminal and notifies the main control unit 132 (S216).

If there are a plurality of terminals registered in operation 213, the call switching target selection unit 136-2 confirms the priority order of the registered terminals from the priority information table 630 (S215). The transfer destination selection unit 136-2 selects the transfer destination terminal according to the confirmed priority and notifies the main control unit 132 (S217).

Referring back to FIG. 5, in operation 250, the main control unit 132 determines whether a terminal selected as a call transfer target exists. When the selected second terminal 200-2 exists, the main control unit 132 transmits a call transfer command to the second terminal 200-2 to the call transfer processing unit 138-2. The call transfer processor 138-2 executes a call transfer command to the second terminal 200-2 (S300), and determines whether the call transfer is successful (S350). If the selected terminal does not exist in operation 250, the call transfer process is terminated.

In step 350, the call transfer processing unit 138-2 requests the main control unit 132 again for call transfer processing when the call transfer is not successful. The gatekeeper 100 selects the call switching terminal again according to the priority order among the call transfer target terminals except for the terminals whose call transfer has not been successfully performed in the previous step under the control of the main control unit 132 An attempt is made to switch (S300).

8 is a flowchart illustrating a procedure for registering a call transfer target terminal according to an embodiment of the present invention.

The first terminal 200-1 or the second terminal 200-2 may be a terminal for registering the second terminal 200-2 as a call transfer target of the first terminal 200-1 through the communication unit 210 And sends a signal to the gatekeeper 100. The main control unit 132 of the gatekeeper 100 receives a signal for registering as a call transfer target through the communication unit 120 and transfers the signal to the registration processing unit 134 (S410).

The identification information management unit 134-1 of the registration processing unit 134 receives the signal for registration as the call transfer target from the main control unit 132 and transmits the identification information table for the first terminal 200-1 610, and the call transfer target terminal ID field 619, respectively (S420).

On the other hand, when a plurality of call transfer target terminals are managed, the identification information management unit 134-1 stores the call transfer registration field 627 and the call transfer priority information table ID field 629 of the identification information table 620 (S420), and the priority management unit 134-2 of the registration processing unit 134 updates the priority field 631 of the priority information table 630 and the transfer destination terminal ID field 633 S430).

The terminal described in this specification may be any terminal capable of receiving a video conference service such as a wire telephone, a wireless telephone, and a mobile terminal.

The present invention is not limited to the configuration and method of the embodiments described above, but the embodiments may be configured by selectively combining all or some of the embodiments so that various modifications may be made. For example, although the present invention has been described with reference to a video conferencing service based on the H.323 protocol, the present invention is applicable to a video conferencing service based on SIP (Session Initiation Protocol) or MGCP (Media Gateway Control Protocol) Can be similarly applied. That is, the content of the communication control apparatus of the present invention can be applied not only to the gatekeeper 100 in H.323, but also to a proxy server (Proxy Server) in SIP and a media gateway (MG) in MGCP.

Here, the terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings, but should be construed as meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It should be understood that various equivalents and modifications may be present.

1 is a configuration diagram of a communication control system according to an embodiment of the present invention.

2 is a block diagram of the gatekeeper 100 shown in FIG.

3 is a block diagram of the terminal shown in FIG.

4A shows the field configuration of the identification information table of the terminal.

4B shows a field configuration of the identification information table and the priority information table of the terminal.

5 is a flowchart illustrating a communication control process according to an embodiment of the present invention.

FIG. 6A is a flowchart illustrating in detail the step of detecting a fault (S100) according to the first embodiment of the present invention.

FIG. 6B is a flowchart illustrating in detail a step S100 of detecting a fault according to the second embodiment of the present invention.

7 is a flowchart illustrating in detail a step S200 of selecting a call transfer target terminal according to an embodiment of the present invention.

8 is a flowchart illustrating a procedure for registering a call transfer target terminal according to an embodiment of the present invention.

Claims (13)

A storage unit for storing identification information of the first terminal and the second terminal; A communication unit for transmitting and receiving signals to and from the first and second terminals; Receiving a signal from the first or second terminal to register the second terminal as a call transfer target of the first terminal, storing the identification information for the second terminal in the storage unit, And a control unit for switching the call from the first terminal to the second terminal through the communication unit with reference to the identification information when a failure is detected in the first terminal when call setup is in progress or completed from the video conference service server And the communication control device. The method according to claim 1, Wherein, Further storing the identification information of the third terminal and the priority information between the second and third terminals, Wherein, When the failure is detected, refers to the identification information of the second or third terminal according to the priority information, and transfers the call from the first terminal to the second or the third terminal through the communication unit Communication control device. 3. The method according to claim 1 or 2, Wherein, When the call setup is not completed within a predefined time from the server to the first terminal or when the quality of at least one of video and audio calls transmitted and received from the server to the first terminal drops below a predefined reference And determines that the failure has occurred. delete A server for providing a video conference service; A first terminal and a second terminal connected to the server and receiving the video conference service; A storage unit for storing identification information of the first and second terminals; A communication unit for transmitting and receiving signals to and from the first terminal and the second terminal; And a controller for performing a call transfer from the first terminal to the second terminal through the communication unit with reference to the identification information when a failure is detected in the first terminal when call setup is in progress or completed from the server, Lt; / RTI > Wherein the first or second terminal comprises: Transmits a signal for registering the second terminal as a call transfer target of the first terminal to the communication control device, Wherein, Receives the signal from the first or second terminal through the communication unit, and stores the identification information for the second terminal in the storage unit. 6. The method of claim 5, And a third terminal connected to the server and receiving the video conference service, Wherein, Further storing identification information of the third terminal and priority information between the second and third terminals, Wherein, When the failure is detected, refers to the identification information of the second or third terminal according to the priority information, and transfers the call from the first terminal to the second or the third terminal through the communication unit Communication control system. The method according to claim 5 or 6, Wherein, And when the call setup is not completed within a predetermined time from the server to the first terminal, the communication control system determines that the failure has occurred. The method according to claim 5 or 6, Wherein the first terminal comprises: A quality of at least one of a video and a voice call transmitted and received from the server to the first terminal is measured at a predefined period and transmitted to the communication control device, Wherein, Receiving at least one quality of the video and audio call from the first terminal through the communication unit and determining that the failure occurs when the quality of at least one of the video and audio call drops below a predefined reference The communication control system comprising: delete Claim 10 has been abandoned due to the setting registration fee. Receiving a signal from the first or second terminal to register the second terminal as a call transfer target of the first terminal and storing identification information for the second terminal; Detecting from the video conferencing service server whether a failure has occurred in the first terminal when call set-up is in progress or completed; Confirming identification information of the first terminal and the second terminal; And transitioning the call from the first terminal to the second terminal with reference to the identification information. Claim 11 has been abandoned due to the set registration fee. 11. The method of claim 10, Wherein the verifying step comprises: Further identifying identification information of the third terminal and priority information between the second and third terminals, Wherein the step of performing comprises: Wherein the first terminal performs the call transfer from the first terminal to the second terminal or the third terminal by referring to the identification information of the second or third terminal according to the priority information. Claim 12 is abandoned in setting registration fee. The method according to claim 10 or 11, Wherein the detecting comprises: When the call setup is not completed within a predefined time from the server to the first terminal or when the quality of at least one of video and audio calls transmitted and received from the server to the first terminal drops below a predefined reference And determines that the failure has occurred. delete

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