System and method for contention based tones in a multipoint-to-point orthogonal frequency division multiplexing system
First Claim
1. A multipoint-to-point, orthogonal frequency division multiplexed (OFDM) communication system comprising:
- a host unit;
a plurality of remote units that access the host unit using an orthogonal frequency division multiple access scheme wherein adjacent carriers transmitted from the plurality of remote units overlap spectrally in an OFDM waveform;
wherein each of the remote units modulates upstream information into an OFDM signal modulated using a Fourier transform;
wherein the host unit receives upstream OFDM signals from a plurality of the remote units, wherein portions of the upstream OFDM signals arrive at the host unit at the same time;
wherein a first remote unit transmits a first upstream signal to the host unit on a first orthogonal tone; and
wherein the first remote unit retransmits the first upstream signal to the host unit in the event a collision occurs on the first orthogonal tone.
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Accused Products
Abstract
Systems and methods for contention based tones in a multipoint-to-point orthogonal frequency division multiplexing system are provided. In one embodiment, a multipoint-to-point, orthogonal frequency division multiplexed (OFDM) communication system comprises: a host unit; a plurality of remote units that access the host unit using an orthogonal frequency division multiple access scheme; wherein each of the remote units modulates upstream information into an OFDM signal modulated using a Fourier transform; wherein the host unit receives upstream OFDM signals from a plurality of the remote units, wherein portions of the upstream OFDM signals arrive at the host unit at the same time; wherein a first remote unit transmits a first upstream signal to the host unit on a first orthogonal tone; and wherein the first remote unit retransmits the first upstream signal to the host unit in the event a collision occurs on the first orthogonal tone.
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Citations
9 Claims
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1. A multipoint-to-point, orthogonal frequency division multiplexed (OFDM) communication system comprising:
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a host unit; a plurality of remote units that access the host unit using an orthogonal frequency division multiple access scheme wherein adjacent carriers transmitted from the plurality of remote units overlap spectrally in an OFDM waveform; wherein each of the remote units modulates upstream information into an OFDM signal modulated using a Fourier transform; wherein the host unit receives upstream OFDM signals from a plurality of the remote units, wherein portions of the upstream OFDM signals arrive at the host unit at the same time; wherein a first remote unit transmits a first upstream signal to the host unit on a first orthogonal tone; and wherein the first remote unit retransmits the first upstream signal to the host unit in the event a collision occurs on the first orthogonal tone. - View Dependent Claims (2, 3, 4)
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5. A system comprising:
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a host unit; a plurality of remote units using an orthogonal frequency division multiple access scheme to communicate at the same time with the host unit using adjacent spectrally overlapping carriers in an OFDM waveform; wherein a first remote unit transmits a first upstream signal to the host unit on a first orthogonal tone; and wherein the first remote unit retransmits the first upstream signal to the host unit in the event a collision occurs on the first orthogonal tone. - View Dependent Claims (6, 7, 8, 9)
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Specification