KR19990020339A - How to handle user call at exchange in video communication - Google Patents

Abstract

end. The technical field to which the invention described in the claims belongs

User Call Processing Method in Switching System for Video Communication

I. The technical problem to be solved by the invention

A method of transmitting image data to a called party before arc forming.

All. Summary of Solution of the Invention

The call processing method in video communication is to set up a path to transmit data when a video communication request signal is received from a caller, to send a setup signal to the set path, and to notify the call progress signal from the network from the switching system of the called side. A process of checking whether a received signal is received, a process of converting image data of a calling party and transmitting it to the calling party's switching system when both a call progress signal and an allating signal are received as a result of the test; A user call processing method in an exchange during video communication, transmitting a connection response signal and performing a video communication mode when receiving a connection signal from the system.

la. Important uses of the invention

User call processing method in exchange in video communication.

Description

How to handle user call at exchange in video communication

The present invention relates to a call processing method in video communication in an exchange system, and more particularly, to a caller image data transmission method in video communication.

In general, several stages of data transmission and reception take place to form a call in a switching system. Therefore, when the user A calls the user B, the user B must answer the call to form a call in the switching system and to transmit and receive image data. Therefore, in the video communication, the user B on the called side could not confirm the image information transmitted from the transmitting side.

Accordingly, it is an object of the present invention to provide a method in which a called party confirms image information and forms a call by transmitting image information before a call is formed at the receiving side.

In order to achieve the above object, the present invention provides a call processing method comprising the steps of: setting a path for transmitting data when a video communication request signal is received from a caller, and transmitting a setup signal to the set path; A step of checking whether an allotment signal is received from the exchange system of the called side and the call signal; and if both the call progress signal and the allotment signal are received as a result of the inspection, the calling side is converted by converting image data of the calling side. And a user call processing method in the video communication exchange, transmitting a connection response signal when the connection signal is received from the called party's switching system and performing a video communication mode. do.

1 is a block diagram of an exchange system to which the present invention is applied.

2 is a control flowchart performed in a call exchange system according to an embodiment of the present invention.

3 is a control flowchart of video communication of a called side according to an embodiment of the present invention;

4 is a flow diagram of an overall signal of an exchange system according to the invention.

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

1 is a block diagram of an exchange system to which the present invention is applied.

The main control unit 111 controls the overall operation of the switching system. In particular, the main control unit 111 controls the user call during video communication according to the present invention, and the ATM AAL5 control unit 112 controls channel formation in the network of the network. The codec connection unit 113 connects to a codec 201 connected to a user's communication terminal, receives image data and audio data, outputs the same to an AAL1 ATM control unit 114 control unit, and outputs the data from the AAL1 control unit 114. The received image and audio data are output to the CODEC 201. The AAL1 controller 114 indicates a protocol data unit (PDU) format of each layer of the signal received from the CODEC 113, and assembles and disassembles the user's information into an ATM cell (Asynchronous Transfer Mode Cell). The data is output to the codec connection unit 113 or the data received from the codec connection unit 113 is assembled and output to the ATM physical layer processing unit 115. The ATM physical layer processor 115 transmits an ATM cell received from the AAL1 controller 114 to a NETWORK network and outputs an ATM cell received from the NETWMOK network to the AAL1 controller 114. When the user requests an image data call from the communication terminal 200, the image data is coded through the CODEC 201 and output to the CODEC connection unit 113 of the switching system 100.

2 is a control flowchart performed in a call exchange system according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to FIGS. 1 to 2.

The main controller 111 maintains the standby state in step 10 and proceeds to step 12 to check whether the video communication request signal is received through the CODEC access unit 113. When the test result image communication request signal is received, the main controller 111 proceeds to step 14 to set a virtual path identifier (VPI) and a virtual caannel identifier (VCI), and performs the test result image communication. If the request signal is not received, go to step 10 to maintain the standby state. When the setting of the VPI and the VCI is completed in step 14, the main controller 111 transmits a SET UP signal to the NETWORK network through the ATM physical layer processor 115. The main controller 111 checks whether an alarting signal is received from the NETWORK network and proceeds to step 22 when the allotted signal is received, and proceeds to step 30 when the allotted signal is not received. . When the main control unit 111 proceeds from step 20 to step 22, the image data received by the COEDC access unit 113 is controlled by the AAL1 control unit 114, assembled into an ATM cell, and sent to the network set through the ATM physical layer processing unit 115. Proceed to check whether a CONNECT signal is received. The main controller 111 proceeds to step 26 when the access signal is received, and proceeds to step 30 when the access signal is not received. When the main control unit 111 proceeds from step 24 to step 26, the main control unit 111 controls the transmission of the connection response signal (CONNECT ACK) and proceeds to step 28 to perform the video communication mode. Here, the video communication mode means that the image data and audio data received from the communication terminal 200 are assembled into an ATM cell and transmitted to the calling exchange system, and the ATM cell received from the calling exchange system is decomposed to the calling party's communication terminal. The process of sending to 200.

In step 18, 20 and 24, the main controller 111 controls the ATM AAL5 controller 112 to release the set VPI and VCI and delete the image data received through the CODEC access unit 113. Quit.

3 is a control flowchart of video communication of a called side according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to FIGS. 1 to 3. It is also assumed that the block diagram of FIG. 1 is an exchange system of the called side.

The main controller 111 maintains the standby state in step 50 and proceeds to step 52 to check whether a SET UP signal is received through the network. When the test result setup signal is received, the main control unit 111 proceeds to step 54 to control the ATM AAL5 control unit 112 to set VPI and VCI, and transmits an alloting signal to the NETWORK network and proceeds to step 56. . In step 56, the main control unit 111 receives an ATM cell of image data received from the NETWORK network, controls the AAL1 control unit 114 to decompose the received ATM cell and outputs the received ATM cell to the COEDC access unit 113. In addition, the main control unit 111 proceeds to step 58 to check whether a connect signal is received from the communication terminal of the called side, and if the connection signal is received as a result of the test, proceeds to step 60 to call through the NETWORK network. If the connection signal is not received and the access signal is not received, the process proceeds to step 66. The reception of the access signal from the communication terminal on the called side here means that the communication terminal on the called side hooks off the handset in response to the video call. In step 62, the main controller 111 checks whether a CONNECT ACK signal is received from the NETWORK network. If the CONNECT ACK signal is received as a result of the test, the main controller 111 proceeds to step 64 to perform a video communication mode, If not, proceed to step 66. On the other hand, if the process proceeds to step 66 in steps 58 and 62, the main control unit 111 controls the ATM AAL5 control unit 112 to release and end the VPI and VCI set in step 54.

4 is a flowchart of the overall signal of the exchange system according to the present invention.

2 to 3 will be described in detail with reference to FIG. 4. Numbers in parentheses denote reference numerals for the steps in FIGS. 2 to 3.

When the call exchange system receives the image communication request signal from the user terminal, the exchange system transmits a SET UP signal to the NETWORK network (16), and the NETWORK network transmits the received setup signal to the call exchange system. The setup signal is sent (52). In addition, a call progress signal (Call Proceeding) is transmitted from the NETWORK network to the caller switching system (18), and an alerting signal is transmitted from the calling side switching system to the NETWORK network (54). The NETWORK network transmits an alloting signal received from the called party's switching system to the calling party's switching system (20).

When the effect side exchange system receives the alating signal, it transmits the image data received from the call side communication terminal to the side exchange system called through the NETWORK network (22, 56). The calling side switching system transmits a connection signal to the NETWORK network when a connection signal is received from a calling terminal (58), and when a connection signal is received to the side called through the NETWORK network (24), the calling side The exchange system sends a connection response signal (CONNECT ACK) to the NETWORK network (26). When receiving a connection response signal from the NETWORK network (62), the call switching system and the switching system of the called party convert data and voice data into ATM cells for data communication (28, 64).

As described above, the calling party's switching system transmits the caller's image data to the calling party's switching system before the call is formed, so that the calling party can confirm and communicate with the sender through the image data in advance. .

Claims (3)

In the video call processing method, Setting a path to transmit data when a video communication request signal is received from a caller, and transmitting a setup signal to the set path; Checking whether a call progress signal is received from the network and an alarming signal is received from the called exchange system; Converting the image data of the calling party and transmitting them to the calling party's switching system when both the call progress signal and the alarming signal are received; And transmitting a connection response signal when the connection signal is received from the called exchange system and performing a video communication mode. The method of claim 1, If the call progress signal or the at least one signal of the signaling signal is not received, canceling the set path and deleting the image data received from the calling party. Treatment method. The method of claim 1, In the video and voice communication, the data transmission process assembles the data to be transmitted into an ATM cell and transmits the data to the called exchange system and decomposes the AMT cell received from the called exchange system to communicate with the calling party. A user call cheating method in an exchange during video communication, characterized by sending to a terminal.