SU1617668A1 - System for transmitting messages - Google Patents

Abstract

The invention relates to communication technology. The purpose of the invention is to increase the reliability of the system when one of the network stations (CCs) goes out of service and to increase the capacity. The message transfer system consists of N CC 1 and N interface 2 blocks. The transmission of information packets is carried out on those outgoing channels, the number of intermediate CC 1 between which subscribers are minimal. The channel is selected based on the analysis of the network state table. At that, possible channel interruptions and malfunction of intermediate CC 1 are analyzed. If, after a certain number of polling cycles of the ring, the transmitting CC 1 does not receive confirmation from the receiving CC 1 in this transmission direction, it is considered that this direction is faulty and the transmission is in another direction, t . system reliability is improved. Reducing the number of hops on intermediate CC 1s by choosing the optimal transmission route allows for an increase in system capacity. 6 Il.

Description

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Recipient's address

Control

Wittel address

Management team

Test Sequence

End at Aketa

Address Poluchatel

Control

Sender's address

formation

Check sequence

End of package

The address of the recipient.

Control

Sender's address

Check sequence

End of package

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Control package

Information package

Receipts

Power up and initiation of the trpOTO col

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Transmitting the UP of the equalizing packet on the first and BTopobty channels

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Waiting for Receipts

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 4 0rmation of the table of addresses funktsiiuyu1eiz

stations

Zash information in the RAM receive buffer

Analysis of the priorities of the station for processing in-focations

Forrow receipts and recording information in the bu headlights of the subscriber

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a) transmit transmission according to the address of the user

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Information transfer and packet fixing prior to receipt of a receipt

Packet destruction chain

Formation of the receipt

Claims (1)

Claim A message transmission system comprising N network stations connected in series in a ring, the second input and output of which are connected respectively to the output and input of each of the N interface units, each of the N network stations containing first and second keys connected in series, 25 connected to the first receiver , the first reception register, the output of which is connected to the first decoder of the end of reception, and the first data buffer, connected in series with the first indicator of the reception status, the first input of which is connected inen with the output of the first receiver, the first transmission synchronizer and the first address counter connected in series to the first transmission synchronizer, the first transmission register 35 and the first transmitter, a control unit connected via the address bus to the corresponding inputs of the read-only memory unit (RAM), random access memory (OZB ), a transmit reception unit40 (BPP), an address decoder, and an interrupt unit, the first input of which is connected to the output of the first reception status indicator, the second input of which is connected to the output of the first a reception end decoder, a second transmitter and a clock, the first output of which is connected to the clock inputs of the first transmission synchronizer, the first transmission register and the first reception synchronizer, the second output of which is connected to the clock input of the first reception register, and the second outputs of the clock are connected to the block synchronization inputs yrt control and BPP, the information inputs and outputs of which are connected via the data bus to the information inputs of the outputs of the control unit 03 B, interrupt block, information the inputs of the first transmission register and the information outputs of the emergency protection device, the first control input of which is combined with the first control input of the OZB and connected to the first control output of the control unit, the second, third and fourth control outputs of which are connected respectively to the second control input of the OZB, the first and second control inputs BPP, and the output of the interrupt unit is connected to the control input of the control unit, characterized in that, in order to increase the reliability of the functioning of the system in case of failure of one from network stations and increasing throughput, a second receiver, a second reception status indicator, a second reception synchronizer and a second address counter, a second transmission synchronizer and a second transmission register, the output of which is connected to the second input through a second transmitter, are introduced into each network station the second key, the first and second receive buffers, the first address inputs of which are connected respectively to the outputs of the first and second address counters, the first and second ele cops And, the control register, connected in series to the second reception register, the outputs of which are connected to the inputs of the second decoder of the end of reception, and the second data buffer, the outputs of which are connected to the information inputs of the second reception buffer, the recording input of which is connected to the control input of the second data buffer and the first the output of the second reception synchronizer, the second output of which is connected to the clock input of the second reception register, and the clock input of the second reception synchronizer is connected to the first output of the clock generator and to the clock inputs of the second transmission synchronizer and the second transmission register, the information inputs of which are connected via the data bus to the information outputs of the first and second receive buffers and the inputs of the control register, the first, second, third and fourth outputs of which are connected respectively to the first inputs of the first and second And elements, the inputs of the first and second transmission synchronizers, the second outputs of which are connected respectively to the second and third inputs of the interrupt unit, the fourth and fifth inputs of which are respectively, with the first and second control outputs of the BPP, the third control input of which is connected to the first output of the address decoder, the second, third, fourth, fifth, sixth and seventh outputs of which are connected respectively to the third control input of the OZB, the second control input of the PZB, the second inputs of the first and second transfer registers. the control inputs of the control register and the interrupt unit, the sixth input of which is connected to the output of the first decoder of the end of reception and the reset input of the first address counter, the input is combined with the input of the first receive buffer and the control input of the first data buffer, the outputs of which are connected to the information inputs of the first buffer reception, the second address inputs of which, combined with the corresponding second address inputs of the second receive buffer, are connected via the address bus to the address outputs of the control unit, the first control output of which is connected to the reading inputs of the first and second receive buffers, the control inputs of which are connected respectively to the outputs of the first and second elements And, the second inverse inputs of which are connected respectively to the outputs of the first and second reception status indicators, the output of which is also connected to the seventh input of the interrupt unit, the eighth and ninth inputs of which are connected respectively to the fifth control output of the control unit and to the output of the second decoder end reception, combined also with the reset input of the second address counter and the second input of the second reception status indicator, and the input of the second reception register is connected to the output of the second receiver, the input of which, as well as the input of the first receiver are connected respectively to the second and third outputs of the first key, the fourth output of which is connected to the third the input of the second key, the fourth input of which is connected to the input of the first transmitter. Fie. 2 Cm go h V ·· m midnight cm »*> "*> F * - mid »·> "5 dl < CHZ •ABOUT § h 1 L5 cho Control package Information package Receipt Figure 4 I Powering on and initiating the protocol no Package destruction chain. information Record ination in __Ψ Formation of receipt of information and fixing -> package until receipt of receipt of receipt Control packet transmission on the first and second channels Waiting for receipts from. functioning nations to— Formation of address table of functioning receipt stations completed Analysis of the priorities of the work of the information processing station Formation of a receipt and recording of information in the buffer of delivery to the subscriber; no choice of the direction of transmission in accordance with the address of the recipient No transmission Organization of information transit “3“ Record of inception in the package destruction chain is free ^ group no no Establishing communication with a subscriber F Select a transfer destination according to the recipient address Transmission of the information field to the subscriber yes. · / Communication with the subscriber is <idle Executing Management Commands Record in. formations to the line output buffer Design and write information to the buffer; Organization re ς. packet transfer Destroying a packet in a vzzachi buffer in a line ΖΣΓ ^- 6