Reduced interference through frequency partitioning
AssigneeMotorola, Inc.
InventorsMichael Kotzin, Eugene Bruckert
Life of this patent
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Abstract
A method of reducing interference within a cellular system (10) by partitioning a designated frequency spectrum within a service coverage area (11, 12, 13, 14, 15, 16, or 17) into a first and at least second spectrum inclusive of the designated frequency spectrum and each with an associated power level. Assignment of communication units to a spectrum and power level are based upon distance from the base site (as determined through signal strength measurements). The spectral content of spectra in adjacent service coverage areas is adjusted to include non-coincidental frequencies.
Claims8
A method of reducing interference within a cellular communication system having a plurality of base station sites, at least two base station sites of the plurality of base station sites being assigned communication resources in a commonly designated frequency spectrum based on a spectral reuse pattern and providing communication services within the commonly designated frequency spectrum to user communication units located within a corresponding service coverage area of each base station site, the method comprising the steps of:
- A) partitioning, at a base station site of the at least two base station sites, the commonly designated frequency spectrum into at least two group spectrums;
- B) transmitting, by the base station site, a beacon signal containing information that identifies the at least two group spectrums, a spectrum threshold for each of the at least two group spectrums, and a spectrum power level for each of the at least two group spectrums;
- C) receiving by a communication unit, the beacon signal, decoding the information and measuring a signal metric of the beacon signal;
- D) comparing the signal metric with at least a first relative magnitude threshold;
- and
- E) seizing, by the communication unit, from the base station site a communication resource that is within a group spectrum of the at least two group spectrums having a relative magnitude threshold of the at least a first relative magnitude threshold exceeded by the signal metric.
A device for reducing interference within a cellular communication system having a plurality of base station sites, at least two base station sites of the plurality of base station sites being assigned communication resources in a commonly designated frequency spectrum based on a spectral reuse pattern and providing communication services within the commonly designated frequency spectrum to user communication units located within a corresponding service coverage area of each base station site, the device comprising:
- A) means, at a base station site of the at least two base station sites, for partitioning the commonly designated frequency spectrum into at least two group spectrums;
- B) means for transmitting, by the base station site, a beacon signal containing information that identifies the at least two group spectrums, a spectrum threshold for each of the at least two group spectrums, and a spectrum power level for each of the at least two group spectrums;
- C) means for receiving, by a communication unit, the beacon signal, decoding the information and measuring a signal metric of the beacon signal;
- D) comparing the signal metric with at least a first relative magnitude threshold;
- and
- E) means for seizing:
- by the communication unit, from the base station site a communication resource that is within a group spectrum of the at least two group spectrums having a relative magnitude threshold of the at least a first relative magnitude threshold exceeded by the signal metric.
Dependencies are inferred from the claim text.