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Method and apparatus for selecting for use between data buses in a redundant bus communication system

  • US 4,630,265 A
  • Filed: 09/26/1984
  • Issued: 12/16/1986
  • Est. Priority Date: 09/26/1984
  • Status: Expired due to Term
First Claim
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1. In a communications system including a plurality of communication devices connected to a plurality of common buses to which identical data is concurrently applied for transmission between the communications devices, a method of determining which of said buses should be utilized for data reception by an individual device comprising the steps:

  • (a) examining each of said buses for the existence of transmitted data;

    (b) establishing a first period of time beginning at the time data exists on any of said buses;

    (c) determining each of said buses on which data existed during said first period of time; and

    ,(d) selecting the bus to use for data reception from those determined to have had data during said first period of time based upon an algorithm including the step of remaining connected to the bus last connected to unless that bus did not show the existence of data during said first period of time.

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