JPS58141097A - Communication control system - Google Patents

Abstract

PURPOSE:To eliminate the need for the switching function of a master station and to allow a circuit to perform communication with only one time slot, by allotting the same time slot to respective slave stations, delaying sent data and compensating the delay of a transmission line, and adding received data to received time slot data. CONSTITUTION:In a figure, the master station 1 having detected origination confirms the number of the opposite slave station of communication from a common line signal from the 2nd originating slave station 42 and then allots a time slot (i) to two slave stations 42 and 4n, which transmit and receive data with the time slot (i). The time slot (i) on a down circuit 3 contains the sum of data of the (n)th slave station 4n and the 2nd slave station 42 and data from a signal input terminal 6 is delayed through a delay circuit 8 by as much as circuit delay and added (subtracted) to the data of the time slot (i) on the down circuit 3 through an adding circuit 9 to extract only the sent data of the opposite station as received data by removing its sent data, thereby sending the received data to a signal output terminal 5.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a communication control system for digital signal transmission. Conventionally, there was a device of this type shown in FIG. 1. In FIG. ) is the upper nine lines, (3) is the lower multi-line, [411iE (4n) is the slave station, (6) is the signal output terminal, and (6) is the signal input terminal. Master station (1
), a slave station that makes calls or data communications, for example, a second
Time slots Hd+ and (i) are allocated to the slave station ■ and the n-th slave station (4n), respectively, and the sending station transmits the signal to the assigned time slots and transmits the signal over multiple lines (
2), the master station (1) switched the time slots and put it on the lower 9 line (3), and the receiving station received only the time slot assigned to it. .

Next, the operation will be explained. The master station (1) allocates time slots (d) and (i) to two slave stations with which it wishes to communicate, for example, the second slave station Ou and the nth slave station (4n), respectively. The second slave station 4 puts the signal from the signal input terminal (6) on the time slot (d) and sends it to the upper multi-line (2), and receives the received data from the time slot (d) of the lower line (3). Output to the output signal output terminal (5).

Similarly, the n-th slave station (4n) transmits in the allocated time slot (i) and receives in the allocated time slot (i).

That is, the master station (1) was configured to exchange the time slots of the upper multiple lines and send the signals to the lower multiple lines. Here, the line is a digital time division multiplex line.

Since the conventional communication control method is configured as described above,
The main station (1) had the drawbacks of requiring a switching function and a line for two time slots.This invention was made in order to eliminate the above-mentioned drawbacks of the conventional system. By allocating the same time slot to each slave station, and receiving data by delaying the sending data to compensate for the delay in the transmission path and adding it to the received time slot data, the master station does not need an exchange function. The purpose of this is to provide a communication control system that allows communication using only one time slot on the line.

An embodiment of the present invention will be described below with reference to FIG.

In the figure, (7) is an addition circuit, (8) is a delay circuit that delays the transmission output, and (9) is an addition circuit that adds (subtracts) the delayed transmission signal and the received signal from the lower multiline (3). be.

Based on the common line signal, the master station (1) detects the call and confirms the slave station number of the other party based on the common line signal from the second slave station (42) that initiated the call. (1) is based on the common channel signal, and the time slot (i
). The two slave stations U (4n) then transmit and receive data in time slot (i). The procedure for allocating time slots to this slave station is well known, so a detailed explanation will be omitted.

Second slave station (6) assigned time slot (i)
Then, the transmission signal from the signal input terminal (6) and the upper υ times M (
The data included in the time slot (i) of 2) is added by the adder circuit (7) and sent out. In this embodiment, the n-th slave station (4n) has a time slot on the upper line) (i
) has only the transmission data of the n-th slave station (4n), and the second slave station (6) has only the transmission data of the n-th slave station (4n) in the time slot (i).
n) and the transmission data of the second slave station (6) are added.

On the downlink (3) time slot) (i), there is data added from the nth slave station (4n) and the second slave station←4, and the data from the signal input terminal (6) is sent to the delay circuit (
8), and the downlink (3) is delayed by the amount of line delay.
The adder circuit (9) adds (subtracts) the data in time slot (i) to remove its own transmitted data, extracts only the other party's transmitted data as received data, and outputs the received data as a signal. Send to terminal (5).

Further, in the above embodiment, the case of a multi-drop line has been described, but a loop line may also be used, and the same effects as in the above embodiment can be obtained.

According to this invention, two communicating stations are allocated the same time slot on a time division multiplex line, and the slave station delays its own transmission signal by the line delay and adds it to the received signal. , the lines can be used effectively, and no switching equipment is required.
There are advantages such as full-duplex data transmission is also possible.

[Brief explanation of the drawing]

FIG. 1 is a system diagram of a conventional communication control system, and FIG. 2 is a system diagram showing an embodiment of the present invention. In the figure, (1) is the master station, (2) is the upper multi-line, and (3)
is the lower multi-line, @υU (4n) is the slave station, (5) is the signal output terminal, (6) is the signal input terminal, (7) is the adder circuit, (8
) line delay circuit; (9) is an adder circuit; Note that the same reference numerals in the figures indicate the same or corresponding parts. Agent Shin Kuzuno (and 1 other person) 50

Claims (1)

[Claims] The same time slot is assigned to two stations communicating or transmitting data using a common channel signal, the transmitting station adds voice or data to the above time slot data and transmits it, and the receiving station adds its own transmitted data. Or, a communication control characterized in that the voice or data of the other station is extracted by multiplying the voice by the delay time due to the transmission path and then adding it to the data of the reception time slot. method.