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Scalable multimedia network

  • US 5,740,176 A
  • Filed: 04/29/1996
  • Issued: 04/14/1998
  • Est. Priority Date: 05/19/1994
  • Status: Expired due to Term
First Claim
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1. In a communication system comprising first and second uni-directional buses oppositely directed, a plurality of units, each said unit and at least one end unit coupled to both buses, said at least one end unit for generating cells on said first bus, said cells including request, idle, empty, and payload cells, at least another end unit for connecting said first bus to said second bus, a method for controlling transmission of said cells, including the steps of:

  • generating at said at least one end unit a cell pattern comprising a series consisting of a request cell of first priority followed by N empty cells of first priority, said series repeating x times and y idle cells;

    transmitting said cell pattern at said at least one end unit onto said first bus;

    receiving said cell pattern at one of said units on said first bus;

    modifying said request cell at said one unit in response to at least one packet having been collected in a priority queue in said unit;

    transmitting said modified request cell at said one unit onto said first bus;

    receiving said request cell at said at least one end unit on said second bus and modifying a priority counter in response to a logical value of said request cell;

    generating said empty cells at said at least one end unit onto said first bus in response to a logical value of said priority counter.

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