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SYSTEMS FOR CONTENTION-BASED BANDWIDTH REQUESTS IN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEMS

  • US 20070263665A1
  • Filed: 07/25/2007
  • Published: 11/15/2007
  • Est. Priority Date: 02/06/1995
  • Status: Abandoned Application
First Claim
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1. A bidirectional communication system, the system comprising:

  • a host unit to communicate with a plurality of remote units using orthogonal frequency division multiplexing, the plurality of remote units communicatively coupled to the host unit in a multipoint-to-point configuration;

    the host unit receiving an orthogonal frequency division multiplexing waveform, the orthogonal frequency division multiplexing waveform comprising a plurality of tones transmitted by the plurality of remote units, wherein the plurality of tones are simultaneously received at the host unit from at least two of the plurality of remote units; and

    wherein the host unit comprises a logic circuit configured to direct a modulator to transmit information on at least one tone of the orthogonal frequency division multiplexing waveform based on whether the host unit successfully receives a request for bandwidth from a first remote unit of the plurality of remote units via a contention based tone.

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