SU1438014A1 - Transceiver unit with reception priority - Google Patents

Abstract

The invention relates to computing. The purpose of the invention is to increase network bandwidth. The transceiver unit contains interface and channel receivers 2 and 7i channel and interface transmitters 3 and 8, detectors 4 and 9, timer 5, priority trigger 6 and trigger unit (KB) 10 r-11. In the receive mode, the information sequence (IP ) enters through receiver 7 to detector 9 and transmitter 8. Detector 9 detects the presence of an IF and generates a Receive signal that allows the transmission of the IP to the transmitter 8. At the output of trigger 6, a Transmission inhibit signal appears that disables the operation of timer 5 and the transmitter. 3, and also causes, at the output of the BZ 10 signal, a Trigger signal for Mr. 11, which forms a Collision signal. In the transmission mode, trigger 6 transmits a signal to the BR 10, timer 5, and transmitter 3, allowing the transmission of an IF. If the duration of the PI is greater than the preset time, then timer 5 generates a Long Burst signal, which disables the transmitter 3 from the common link. The goal is achieved by introducing trigger 6 and BZ 10. 3 Il. (L from 00

Description

The invention relates to computing technology, in particular to tech data transmissions, and can be used for post-deployment mono-local local computing networks with multiple access, carrier control and collision detection in control systems, data processing acquisition

The purpose of the invention is to increase the capacity of the network,

FIG. 1 is a block diagram of a transceiver unit with reception priority} in FIG. 2 is a priority trigger circuit; on fig.Z - diagram of the generator start block

Transceiver unit 1 with reception priority (FIG. 5) contains interface receiver 2, channel transmitter 3, first detector 4j timer 5, priority trigger 6, channel receiver 7, interface transmitter 8, second detector 9 | the generator start unit 10. and the generator 11. FIG. 5 also shows the machine station 12 and the general communication line I3 with the load element 14.

The priority trigger (figure 2) form the element OR NOT / OR. 5 to EdemeN g BL-NOT 16

The generator start unit (FIG. 3) includes the first and second inverters 17 and 18 and the first and second elements of BL-HE 19 and 20.

Receiving a transmitting unit 1 with a receiving priority works as follows.

In receiving information from the common communication link 13, when there is no transmission from its station 12, the information sequence goes to the channel receiver 7 From the output of the front end receiver 7, information is fed to the input of the second detector 9 and the first input of the interface transmitter 8. The second detector 9 determines the presence of an information sequence (gossip on the common link 13 and the signal is received at the first output J transmitted to the input of the priority trigger 6 and the second input of the interface transmitter 8 Signal Receipt allows in the information sequence to the transmitter interface Nome 8 th informatsion1; input station 12 at the output of flip-flop; 6 is the priority of the transmission prohibition signal which is fed to

five

five

0

O

five

the timer input 5j to the third input of the channel transmitter 3 prohibit their operation; that, and to the input of the unit 10 start generator

When an attempt is made by S1 station 12 to transmit an information sequence to a common communication line 13, due to the 3S1 support for determining the absence of transmissions on a common line, information arrives at the interfax receiver 2, from the first output of which it goes to the first input of the channel transmitter 3, and from the second output to the input of the first detector 4 “The first dec 4 determines the availability of information and generates a signal from the transient. Transmit S transmits the first inputs of priority trigger 6 and the generator start block 0, since at the second input of trigger b A set signal is received. The trigger status of priority 6 does not change and the signal Zaprggg perednat ,, I turn off --- the channel transmitter 3. is not removed. The presence of signals Transmit and Inhibit transmission on the first and third inputs of the generator Shapus generator causes on the left its output signal Run j transmission. first and: and the input of the generator 1 1, At the output of the generator 11, a signal appears Collision g which transmits and to the input of Coll. above station 12e

E mode Transmission in the absence of a signal in the common link 13 in the absence of a signal Reception e-signal Transmission triggers the priority trigger 6, the output of which generates a Transmission Inhibition signal transmitted by the codes of the generator 10 start and timer 5 and to the third input of the channel transmitter 39, which is the resolution of the channel transmitter 3 for transmitting the transmission. The MCPD arriving at its iiepsfctfi input, into the common link 13 and the signal is the start of the timer 5 o E case if the duration of informative card output is greater than that in any other case; Timer 5 appears. A signal is sent to the Linear packet S, which arrives at the swarm input of the channel gearbox rk 3, which is taken from the general LENIK 13 link;

The presence in common of I3 of the connection of two or Güley transmissions was determined by a second detector 9, at the first level of which a StolKBBime signal appeared on the line transmitted to the third input of the generator 10 starting block, causing it to trigger and, as a result , transmission to station 12 of the signal of a collision,

The trigger 6 priority works as follows.

When the signal is removed, the transmission at the inverse output of the NL-NE / IPI element 15 is present at a low logic level, which arrives at the first input of the ICH-NI element 16 and enables it to be triggered. Setting the receive signal causes the output of an OR-NOT 16 high-level element, which enters the input element OR.NE / STII 15 and blocks it. In this case, the occurrence of the Transmit signal does not change the states of the CM-HE / OR 15 element and the Transmission Inhibit signal state. Signal Dismissing A transmission prohibition is possible only if there is no reception signal and the presence of a transmission signal.

By taking the work unit 10 to start the generator.

At the input of the first inverter 17, a signal collides in the line, the first input of the first element OR NOT 19 receives an inverted signal. It locks the transmission, and the second input receives the signal Transmission. The output of the second element IGSHE 20 produces the Start signal. The Trigger signal can be set by two conditions: or by the presence of a signal Collision in a line, by transmission, or by the signals of the Prevent transmission and Transmission.

0

5 0 5

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g 0

Claims (1)

Claims of the Invention Transmitter-receiving unit with reception priority, containing a serially connected interface receiver and a channel transmitter, first and second detectors, a timer generator, and serially connected channel receiver and an interface transmitter,. the second output of the interface receiver is connected to the input of the first detector, the timer output is connected to the second input of the channel transmitter, the output of the channel receiver is connected to the input of the second detector, the first output of which is connected to the second input of the interface transmitter, and the input of the interface receiver , the output of the interface is transmitted, the sensor is connected to the information input of the station, the output of the generator is connected to the input of the Collision of the station, the output of the channel transmitter is connected a common communication link, the input of the channel receiver is connected to a common communication link, characterized in that, in order to increase network capacity, a priority trigger and a generator start block are added, with the output of the first detector connected to the first input of the generator start-up and the first priority trigger input, the output of which is connected to the timer input, the third input of the channel transmitter and the second input of the generator startup unit, the output of which is connected to the generator input, the first output of the second detector is connected to the second the priority trigger input, and the second output of the second detector is connected to the third input of the generator start up. Reception Ban f7epedot / i / nepedat a 79 FIG. g Fig.z