KR0137642B1 - Multiplexer for isdn data - Google Patents

Abstract

The present invention relates to a data transmission apparatus in a data terminal of an integrated information communication network (ISDN), which is connected to an S bus interface and an information bus, and is connected to the control means and an address, data, and control bus and carried on the information bus. A plurality of data interface means for transmitting and receiving data differently by a delayed time by delaying a data reading time using a frame head and a corresponding one-to-one correspondence to each of the data interface means are used. If the existing DTE is low speed through the integrated information communication network by providing an ISDN data multiplexing device comprising a plurality of integrated information communication network data terminals for transmitting and receiving data in accordance with the data reading time Up to 16 devices can be connected There is an effect of improving the economics of the royalties and the efficiency of the system.

Description

ISDN data multiplexer

1 is a block diagram illustrating a technique relating to a data transmission method in a conventional ISDN.

FIG. 2 is a block diagram showing the data matching unit shown in FIG.

3 is an operation timing diagram of the apparatus shown in FIG.

4 is a block diagram illustrating a technique relating to a data transmission method in an ISDN according to the present invention.

FIG. 5 is a block diagram of the data multiplexing control unit shown in FIG.

6 is an operation timing diagram of the system shown in FIG.

* Explanation of symbols for main parts of the drawings

1: S interface part 2: CPU part

3: memory section 4: LCD section

5: Keypad part 6: Audio interface part

7: telephone interface unit 8: ring generating unit

9: DTMF receiver 10: V ₁ 24 interface

11: Data matching section 12: AC / DC converter

11-1: DCE interface section 11-2: Speed matching section

11-3: Information Interface Unit 13: Data Multiplexing Control Unit

I ₁ to I _n : Data interface 13-1: Delay

13-2: Decoder section 13-3: Decoder selection section

The present invention relates to a data transmission apparatus in a data terminal equipment (hereinafter referred to as DTE) of an integrated information communication network (ISDN). In particular, up to 16 DTEs can be connected to the integrated information network to simultaneously connect up to 16 DTEs. The present invention relates to a data multiplexing device for transmitting data using two B-channels.

In general, referring to the accompanying drawings, a conventional data transmission apparatus is as follows.

FIG. 1 is a block diagram for explaining a technology related to a data transmission apparatus in a conventional ISDN, and includes a telephone interface unit 7 for enabling power supply, impedance matching, ring control, and loop detection to an existing analog telephone. A ring generator (8) for generating a ring to be supplied to an analog telephone, a CPU (2) for controlling the operation of the entire circuit and communicating with ISDN over the D-channel, and DTMF tones transmitted from the telephone. DTMF receiving unit 9 which informs the CPU unit 2 and converts an analog audio signal into a digital signal, converts a digital signal into an analog signal, and selects a U / A law. An audio interface unit 6, which converts into a bus form and communicates with the S interface unit 1, has a function of generating various tones, and a memory for storing programs and data for comprehensive information communication. (3), an LCD unit 4 for displaying information such as communication status supported by the current time, date, and ISDN, a keypad unit 5 for detecting the pressed state of the keypad, and AC 110V / 220V AC / DC conversion unit 12 for receiving and converting to internal power, V ₁ 24 interface unit 10 for converting a data level connected to a data terminal and communicating to an internal operation level and providing a signal of V ₁ 24 standard; A data matching section 11 or the like.

The configuration and operation of the data matching unit 11 is a DCE interface unit 11-1 which removes and inserts start and end bits in the case of ASYNC and extracts only data of ASYNC and SYNC as shown in FIG. RA1 and intermediate which receives the output data of the DCE interface unit 11-1 and converts the user speed to the speed of 2 ^k * 8 (K = 0,1,2), which is the intermediate speed, to meet the standard of V ₁ 110 RA2 converts the speed to 64Kbps, speed matcher 11-2 for directly converting the user speeds of 48Kbps and 56Kbps to 64Kbps, and converts data from the speed matcher 11-2 to the information bus form and vice versa. The information bus interface unit 11-3 converts and operates.

In the conventional system configured as described above, the S interface unit 1 converts and transmits the voice and data transmitted through the information bus and the LAPD message controlled by the CPU 2 into an ISDN interface format and an AMI code. Through the transformer for impedance matching, 2B + D 144Kbps information data and other control data are communicated at 192Kbps. Therefore, when matched to 8Kbps as shown in FIG. Only 1 bit is used because 8Kbps data transmission to 125us is used.When 16Kbps is matched (7200, 9600bps), only 2 bits are used. Used.

In the conventional method as described above, inefficient data transmission is presented as a problem because many areas are not used in one channel when data of low speed is transmitted.

An object of the present invention to solve the above problems is to connect up to 16 DTEs to a general information communication network using a data transmission area that is not used for data transmission, and to simultaneously connect two B-channels of 16 DTE data. It is to provide an ISDN data multiplexing device for transmission by using.

A feature of the present invention for achieving the above object is a data transmission apparatus having control means for controlling the entire system and connected to an S interface portion of an S point of a comprehensive information communication network, wherein the S interface portion and an information bus are provided. A plurality of data interfaces connected to the control means, address, data and control bus to delay data reading time using a frame head loaded on the information bus by a predetermined time and transmit and receive data differently by a delayed time. And a plurality of integrated information and communication network data terminals connected one-to-one to each of the means and the data interface means to transmit and receive data in accordance with the data reading time using the corresponding frame head.

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

4 is a block diagram illustrating a technique for data multiplexing in an ISDN according to the present invention, and includes a telephone interface unit for supplying power to an existing analog telephone, impedance matching, ring control, and loop detection. 7), a ring generator 8 for generating a ring to be supplied to the analog telephone, a CPU 2 for controlling the operation of the entire circuit and communicating with ISDN over the D channel, and DTMF transmitted from the telephone. DTMF receiver 9 for receiving a tone and notifying the CPU unit 2, and a combo function for converting an analog voice signal into a digital signal, converting a digital signal into an analog signal, and selecting a U / A law. Converting the signal into the information bus form and communicating with the S interface unit 1, storing the audio interface unit 6 having a function of generating various tones, and a program and data for comprehensive information communication. Memory unit 3 for display, an LCD unit 4 for displaying information such as the communication time supported by the current time, date, and ISDN, a keypad unit 5 for detecting the pressed state of the keypad, and an AC 110V / AC / DC converter 12 for receiving 220V and converting into internal power, and a plurality of data interface units I ₁ to I ₁₆ connected to the data terminal (DTE) and connected to the above components. It consists of.

The data interface units I ₁ to I _{16 are} connected to the integrated data communication network data terminal (DTE) to convert a data level communicated to an internal operation level and provide a V ₁ 24 interface unit for providing a signal of V ₁ 24 standard ( 10) and the CPU unit connected to the S interface unit 1 by an information bus and connected to the address, data and control bus of the CPU unit 2 to read data using a frame head loaded on the information bus. The data multiplexing control unit 13 for delaying a predetermined time by the control signal of (2) and the V ₁ 24 interface unit 10 and the data multiplexing control unit 13 are connected to match the speed and transmission / reception of data. It consists of a data matching section 11 for.

In addition, the data matching unit 11 removes and inserts start and end bits and extracts and outputs only data of ASYNC and SYNC, and the DCE interface unit 11-1 and the DCE interface unit 11-1. RA1 and 48Kbps, which converts the user speed into the speed of 2 ^k * 8 (K = 0,1,2), which is the intermediate speed, and 64Kbps, according to the specification of V ₁ 110. The speed matching section 11-2 converts the user speed of 56 Kbps directly into 64 Kbps and the data of the speed matching section 11-2 according to the frame head signal and the information bus of the data multiplexing control section 13 to form an information bus. And an information bus interface unit 11-3 for converting to and vice versa.

As shown in FIG. 5, the data multiplexing control unit 13 includes a delay unit 13-1 for delaying the frame head indicating the start of all information buses, and 16 types of delay units. A decoder selector 13-3 for selecting the delayed frame head and a decoder 13-2 for outputting the frame head according to the selection of the decoder selector 13-3. Is done.

The above configuration is a circuit that can be applied when a plurality of DTEs are connected and simultaneously transmits a plurality of DTE data through two B-channels. A preferred operation example of the data transmission apparatus according to the present invention will be described as follows. .

In order to realize the object of the present invention, first, the channel related register of the data matching unit 11 in the data interface units I ₁ to I ₁₆ is designated as the channel 1, and all the information buses are passed through the delay unit 13-1. Delaying the frame head (FRAME HEAD) to inform the start (see Fig. 6), the decoder selector receives 16 frame heads (FRAME HEAD) delayed and output from the delay unit 13-1 (13-3) selects the required frame head (FRAME HEAD), and controls the decoder unit (13-2) for outputting the frame head (FRAME HEAD) selected by the decoder selector (13-3), and so on. As shown in FIG. 6, a frame head (FRAME HEAD) for notifying the start of the information bus is differently supplied to the data matching unit 11 in the data interface units I ₁ to I ₁₆ .

Therefore, when both channels are used, 16 terminals are converted into 8Kbps data, 8 terminals are converted into 16Kbps data, and 4 terminals are converted to 32Kbps data.

In addition, by selecting the decoder selector 16-3, the channel is variably controlled according to various situations converted to 8Kbps or 16Kbps and 32Kbps, thereby maximizing efficiency.

Other configurations follow the operation description of the prior art device.

By providing the ISDN data multiplexing device according to the present invention operating as described above, it is possible to connect up to 16 existing DTEs at a low speed through a comprehensive telecommunication network, thereby reducing the cost of use and the efficiency of the system. This has the effect of being improved.

Claims (7)

A data transmission apparatus having control means for controlling the entire system and connected to an S interface portion of an S point of a comprehensive information communication network, the data transmission apparatus being connected to the S interface portion and an information bus, the control means and the address, data and control bus. A plurality of data interface means connected to each other for delaying a data reading time using a frame head loaded on the information bus by a predetermined time and transmitting and receiving data differently by a delayed time; And a plurality of integrated information and communication network data terminals connected to each of the data interface means in a one-to-one correspondence and transmitting and receiving data in accordance with a data reading time using a corresponding frame head, respectively. ) Data Multiplexing Device. The method of claim 1, wherein the data interface means is the ISDN data is connected to the terminal sikimyeo converts the data levels to be communicated into the operation level V ₁ to provide a signal V ₁ 24 24-compliant interface unit; An interface connected to the S interface unit and an information bus, the control means and an address; A data multiplexing control unit connected to a data and control bus and delaying a data reading time using a frame head loaded on the information bus by a control signal of the control means; And a data matching unit connected between the V ₁ 24 interface unit and the data multiplexing control unit to match data rate and transmission / reception. 2. 3. The apparatus of claim 2, wherein the data matching unit comprises: a DCE interface unit for removing and inserting start and end bits and extracting and outputting only data of ASYNC and SYNC; RA1 converts the user speed into the speed of 2 ^k * 8 (K = 0,1,2), which is the intermediate speed, and 64 Kbps to meet the specifications of V ₁ 110 by receiving the output data of the DCE interface unit. A speed matching unit for directly converting user speeds of RA2, 48Kbps, and 56Kbps to 64Kbps; And an information bus interface unit for converting data of the speed matching unit into an information bus form and vice versa according to a frame head signal of the data multiplexing control unit. 3. The data acquisition system of claim 2, further comprising: a delay unit for delaying a frame head for notifying the start of all information buses; A decoder selector for selecting a frame head delayed by the delay unit; And a decoder unit for outputting a frame head according to the selection of the decoder selecting unit. The apparatus of claim 1, wherein 16 terminals are capable of communicating simultaneously with data converted to 8 Kbps when both B channels are used. 6. The apparatus of claim 1, wherein eight terminals are capable of communicating simultaneously with data converted to 16 Kbps when both B channels are used. The apparatus of claim 1, wherein four terminals are capable of communicating simultaneously with data converted to 32 Kbps when both B channels are used. 6.