System and method for single-point to fixed-multipoint data communication
First Claim
1. A single point to multipoint communications system comprising:
- a base station capable of providing a forward channel signal; and
a plurality of remote stations capable of (i) monitoring said forward channel signal, (ii) monitoring a reverse channel during a clear channel assessment interval, and (iii) transmitting a reverse channel signal when said reverse channel is clear;
wherein said plurality of remote stations are distributed among at least two zones including a first zone and a second zone, said first zone of remote stations monitoring said reverse channel during a first clear channel assessment interval and said second zone of remote stations monitoring said reverse channel during a second clear channel assessment interval.
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Abstract
Systems and methods for single-point to fixed-multipoint communication. The invention dynamically allocates bandwidth based on traffic demands, thus providing efficient bandwidth utilization, particularly with bursty or time sensitive data traffic. A system includes a Base Station and a plurality of Remote Stations. The Base Station transmits information to the Remote Stations via a Forward Channel and the Remote Stations transmit information via a Reverse Channel. Before transmitting on the Reverse Channel, each of the Remote Stations listens (monitors) the Reverse Channel to ascertain whether any other Remote Station is transmitting. Remote Stations transmit data only when a Remote Station determines that the channel is clear. The Remote Stations listen in sequential order, eliminating the probability of collisions caused by simultaneous transmissions from Remote Stations. The data traffic is accordingly aggregated, thus providing efficient bandwidth utilization.
40 Citations
41 Claims
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1. A single point to multipoint communications system comprising:
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a base station capable of providing a forward channel signal; and
a plurality of remote stations capable of (i) monitoring said forward channel signal, (ii) monitoring a reverse channel during a clear channel assessment interval, and (iii) transmitting a reverse channel signal when said reverse channel is clear;
wherein said plurality of remote stations are distributed among at least two zones including a first zone and a second zone, said first zone of remote stations monitoring said reverse channel during a first clear channel assessment interval and said second zone of remote stations monitoring said reverse channel during a second clear channel assessment interval. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for a single-point to a fixed multi-point system having a base station and a plurality of remote stations distributed among at least two zones including a first zone and a second zone, the method comprising the steps of:
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transmitting from said base station a forward channel signal;
monitoring for said forward channel signal at each of said plurality of remote stations;
monitoring a reverse channel at each of said first zone of remote stations during an exclusively assigned dwell time within a first clear assessment interval;
monitoring a reverse channel at each of said second zone of remote stations during an exclusively assigned dwell time within a second clear assessment interval;
if said reverse channel is clear during a dwell time exclusively assigned to a first remote station and said first remote station has information to send to said base station, transmitting a reverse channel signal from said first remote station. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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24. A multiple access communication system, comprising:
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a base station that provides a forward channel signal; and
a plurality of remote stations, wherein each remote station monitors said forward channel signal, monitors a reverse channel within an assigned period of time in a clear channel assessment interval, and provides a reverse channel signal when said reverse channel is clear within said assigned period of time, wherein said forward and reverse channel signals comprise parallel spread spectrum communication signals. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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Specification