SU1490715A1 - Multi-access transceiver - Google Patents

Abstract

The invention relates to computing. The purpose of the invention is to increase throughput. The transceiver contains interface receivers 1 and 2, detectors 3, 4 and 5, timer 6, channel transmitter 7, channel receiver 8, generator 9, interface transmitter 10 and repeater 11. The goal is achieved by introducing receiver 2 and detector 5, which provides the possibility of transmitting a "collision" signal to a common communication line. This makes it possible to use a transceiver in working with a repeater or to test a common communication line using reflectometry methods when working with a station. 2 Il.

Description

UNION OF ADVISORS.

SOCIALIST

REPUBLIC »SU 1490715 A1

STATE NOMINATION FOR INVENTIONS AND NORTHGIES UNDER SCSTAN OF THE USSR

DESCRIPTION OF THE INVENTION

TO AUTHOR'S CERTIFICATE (21) 4089895 / 24-09 (22) 16.07.86 (46) 06/30/89. Bull. No. 24 (71) Moscow Institute of Electronic Engineering (72) S.N. Almaev, E.B. Baranovsky,

E.P. Vashchilin, S.D. Volkov and T.I. Smolenskaya (53) 621.394.6 (088.8) (56) US Patent No. 4384363, cl. 455-58, 1983.

(54) TRANSMITTER FOR NETWORK WITH

MULTIPLE ACCESS (57) The invention relates to computer technology. The purpose of the invention is to increase throughput. The transceiver contains interface receivers 1 and 2, detectors 3, 4 and 5, a timer 6, a channel transmitter 7, a channel receiver 8, a generator 9, an interface transmitter 10 and a relay 11. The goal is achieved by introducing a receiver 2 and a detector 5, with which it is possible transmitting into the common line of the seji signal Collision. This makes it possible to use a transceiver in work with a repeater or to test a common communication line using reflectometry methods when working with a station. 2 ill.

Figure 1

14907! 5 ,, ίι j ·. ν. '. κε refers to computer technology and can be used in multi-channel local computer networks with multiple access, carrier control and collision detection in ynjbiB ieiiii.H systems, information collection and processing.

The purpose of the invention is to increase jq throughput.

On fit.1 shows a structural electrical diagram of a transceiver; figure 2 is a structural electrical diagram of a channel transmitter. fifteen

A transceiver for a multiple access network contains first and second interface detectors 1 and 2, first, second and third detectors 3-5, a timer 6, a channel transmitter 20 sensor 7, a channel receiver 8, a generator 9, an interface transmitter 10 and a relay 1 1 .

The channel transmitter is formed by the first and second resistors 12 and 13, the first 25th, the second and third diodes 14-16, the first through fifth switches 17-21 and the inverter 72.

Price: ίοί; with the transmitter works as follows. thirty

I? the mode of receiving information from a common communication line is an informational sequence. arrives at the channel receiver 8. From the output of the channel receiver, information is supplied to the second input of the second detector 4 and the first input of the interface transmitter 10. The second detector 4 determines the presence of the information sequence in the common communication line and generates a signal at the first output that goes to the second input of the interface transmitter 10 and allowing the transmission of received information from a common communication line to the second (information) input of the relay 11.

If there are one or more transmissions in the common communication line at the second output of the second detector 4, a signal appears at the input of the generator 9 and is a start signal for it. The generator 9 generates a Collision signal, which is fed to the first input (Collision) of the relay 11. D> we transmitted information inform the other as follows:> The signal comes from the first information output35 and the relay 11 to the input of the first interface receiver 1.

From the first output of the first interface receiver 1, information is supplied to the first input of the channel transmitter 7. From the second output of the first interface receiver 1, information is fed to the input of the first detector 3, from the output of which a signal is received allowing the operation of the channel transmitter 7 (second input) and the timer 6 . From the output of the channel transmitter 7, the information sequence is transmitted to a common communication line.

If the duration of the information packet exceeds the maximum, a timer 6 is activated, from the output of which a signal blocking its operation is transmitted to the second input of the channel transmitter 7.

At the end of the transmission, when the signal enabling the operation of the channel transmitter 7 is removed, a short signal appears at the first output of the second detector 4, which starts the generator 9. In the event of a collision in the paired segment (simultaneous presence of two or more transmissions) from the output Collision of relay 11 to the second interface the receiver 2 transmits a Collision signal, which from the output of the latter goes to the input of the third detector 5. At the output of the third detector 5, a signal arrives at the fourth input of the channel th transmitter /.

The channel transmitter 7 transmits a DC current sprinkler to the common communication line, the duration of which is equal to the duration of the Collision signal transmitted by the relay 11.

Channel transmitter 7 operates as follows. In the absence of a signal, a collision from repeater 11, key 20 is turned off, key 19 is turned on. The appearance of the information sequence at the input of the first interface receiver 1 triggers the first detector 3, the output of which is a signal that passes through the key 19 to the control input of the key 18. The information sequence from the output of the first interface receiver 1 through the key 18 is fed to the control input of the key 17 and , respectively, causes a current supply from the I-EI power source through a resistor 12 and diodes 14-16 to a common communication line. If the packet exceeds the maximum duration, the timer 6 is activated and a signal is transmitted to the control input of the key 21.

The key 21 closes the output of the key 17 to a common wire, i.e. disconnects the transceiver from the common communication line.

When a signal appears Collision at the input of the second interface receiver 2 at the output of the third detector 5, a signal appears that goes to the input of the inverter 22. and the control input of the key 20, which causes the keys 19 and 18 to be turned off and the key 20 to be turned on. A current package is transmitted to the common communication line from power source | -E | through a resistor 13, a key 20, diodes 14-16, equal to the duration of the signal Collision.

Thus, the proposed transceiver allows transmitting a Collision signal to a common communication line, which makes it possible to use it in working with a repeater or to test a common communication line using reflectometry methods when working with a station.

Claims (1)

Claim A transceiver for a multiple access network comprising a re1490715 translator, the first input of which is connected to the input of the first interface receiver, the first output of which is connected to the first input of the channel transmitter, the second input of which is connected to the output of the first detector, to the first input of the second detector and to the timer input the output of which is connected to the third input of the channel transmitter, the output of which is connected to the input of the channel receiver, the output of which is connected to the second input of the second detector and to the first 15 input of the int interface transmitter, the second input of which is connected to the first output of the second detector, the second output of which is connected through the generator to the first input of the repeater, 2Q the second input of which is connected to the output of the interface transmitter, while the second output of the first interface receiver is connected to the input of the first detector, and the output of the channel 25 of the transmitter is connected to a common line, characterized in that, in order to increase throughput, a second interface receiver 30 and a third detector are connected in series to stroke channel transmitter which is connected to a fourth input, said second repeater output coupled to the input of the second receiver front-end.