Tone allocation in multipoint-to-point communication using orthogonal frequency division multiplexing
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United States of America Patent
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Jul 13, 2010
Grant Date -
Mar 26, 2009
app pub date -
Nov 17, 2008
filing date -
Feb 6, 1995
priority date (Note) -
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Abstract
Systems and methods for OFDM tone allocation are provided. In one embodiment, an end-user communication device comprises: 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. 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 OFDM. The first remote unit is configured to determine when bandwidth is needed for upstream transmission to the host unit. The first remote unit is configured to transmit a request for bandwidth to the host unit on a first tone of the plurality of tones, wherein access to the first tone is contention-based.
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