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Port logic for a communication bus system

  • US 4,292,623 A
  • Filed: 06/29/1979
  • Issued: 09/29/1981
  • Est. Priority Date: 06/29/1979
  • Status: Expired due to Term
First Claim
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1. Method for attaining asynchronous, collision-free data signal communication on a local shared bus network interconnecting a plurality of transceiving ports, each port executing the steps of:

  • (1) signalling an intention to transmit a message;

    (2) delaying transmission for a period equal to the total bus latency plus the propagation delay of an intention to transmit signal;

    (3) ascertaining that no signals indicating an intention to transmit, and no data signals, are being received at said each port; and

    then(4) sending the message.

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