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Passive bus system for decentrally organized multi-computer systems

  • US 4,446,515 A
  • Filed: 12/31/1980
  • Issued: 05/01/1984
  • Est. Priority Date: 01/17/1980
  • Status: Expired due to Fees
First Claim
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1. In a decentrally organized multi-computer system incorporating a plurality of function units, a passive bus communication system comprising an internal communication function unit for carrying on all data exchange operations between individual ones of said function units, said passive bus communications system employing exclusively optical transmission means, means associated individually with a plurality of said function units for the control of said bus system, a plurality of optical transmitter-receivers individually allocated to said function units and a light wave guide for optically connecting said optical transmitter-receivers to all other optical transmitter-receivers, said light wave guide being individually allocated to each said transmitter-receiver by means of an optical mixer, said optical mixer comprising a bidirectional mixer operating as the central mixer in a central level of the passive bus system, and including a plurality of transmission-reception lines each of which is respectively connected between the branching point of a branching unit and one of a plurality of terminals of a first group of terminals of the central mixer, a plurality of auxiliary computers, means for connecting said auxiliary computers to terminals of said branching units, and means for connecting at least one function unit directly to a plurality of terminals of a second group of terminals of the central mixer without using a branching unit.

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