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Method and apparatus for arbitration on a full-duplex bus using dual phases

  • US 8,140,729 B2
  • Filed: 01/19/2010
  • Issued: 03/20/2012
  • Est. Priority Date: 11/05/1999
  • Status: Expired due to Term
First Claim
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1. A method for requesting bus arbitration in a network comprising a bus, a master node, and one or more non-master nodes, the bus comprising a plurality of alternating phases having at least an even phase and an odd phase, the method comprising:

  • identifying if a first bus phase is even or odd;

    determining whether bus arbitration is fair during the first bus phase; and

    if bus arbitration during the first bus phase is not fair, queuing a request for bus arbitration, the request having an indicia identifying one of a plurality of exclusive second phases comprising a next odd phase and a next even phase;

    wherein;

    if the first bus phase is even, queuing the request for bus arbitration during the next odd phase; and

    if the first bus phase is odd, queuing the request for bus arbitration during the next even phase.

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