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Tone allocation in multipoint-to-point communication using orthogonal frequency division multiplexing

  • US 7,756,060 B2
  • Filed: 11/17/2008
  • Issued: 07/13/2010
  • Est. Priority Date: 02/06/1995
  • Status: Expired due to Fees
First Claim
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1. An end-user communication device, the device comprising:

  • a first remote unit for communicating with a host unit using orthogonal frequency division multiplexing (OFDM), the host unit communicatively coupled to a plurality of remote units in a multipoint-to-point configuration, wherein OFDM waveform from distinct remote units of the plurality of remote units combine to a unified OFDM waveform at the host unit;

    wherein the first remote unit is configured to transmit up to a plurality of tones, the up to a plurality of tones modulated with upstream information using orthogonal frequency division multiplexing;

    wherein the first remote unit is configured to determine when bandwidth is needed for upstream transmission to the host unit; and

    wherein the first remote unit is configured to transmit a request for bandwidth to the host unit on at least one tone of the plurality of tones, wherein access to the at least one tone is contention-based.

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