Frequency re-use for point to multipoint applications
First Claim
1. A frequency re-use pattern for a communication frequency spectrum for a point to multipoint wireless communication system comprising plural cells each divided into plural primary sectors wherein each of the plural cells includes a base station located proximate to the geometric center of the cell and one or more remote stations distributed within the cell, said frequency re-use pattern comprising:
- a plurality of polarized channels wherein each polarized channel is comprised of one of a plurality of non-overlapping channels within said frequency spectrum in either a first or a second polarization wherein said first and second polarizations are orthogonal;
a plurality of cell types wherein each of the plurality of cell types is assigned a number of polarized channels of the first of said orthogonal polarizations and an equal number of polarized channels of the second of said orthogonal polarizations such that each one of said plurality of polarized channels is assigned to only one cell type, whereby the polarized channels assigned to a one of the plurality of cell types provides communication links within each cell between the base station and the remote stations of said each cell of said one of the plurality of cell types;
a plurality of groups of cells wherein each one of the plurality of groups of cells contains cells of only one cell type; and
a contiguous pattern of cells comprised of said plurality of groups of cells wherein said contiguous pattern of cells is arranged such that no adjoining cells are of the same cell type, thereby creating a frequency re-use pattern.
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Accused Products
Abstract
The inventive cellular reuse plan uses a tessellating grouping of cells to form a pattern, which is then repeated to form a larger cell cluster. The mosaic pattern uses several different cell types. Each cell type preferably comprises a different set of channel assignments. The channels are preferably provided additional orthogonality, such as through the use of polarization, where channel assignments within a cell are grouped to provide adjacent sectors, as a block, with primary communication links using commonly polarized channels. The different cell types are then arranged in the mosaic pattern. Each particular cell in the pattern has adjoining cells that are of a different type than the particular cell. The most preferred embodiment cell pattern does not utilize all available channels to thereby provide reserve channels for use in providing redundant links and/or added capacity. Preferably, each of the reserve channels provides redundant communication links to a block of commonly polarized primary channels.
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Citations
44 Claims
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1. A frequency re-use pattern for a communication frequency spectrum for a point to multipoint wireless communication system comprising plural cells each divided into plural primary sectors wherein each of the plural cells includes a base station located proximate to the geometric center of the cell and one or more remote stations distributed within the cell, said frequency re-use pattern comprising:
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a plurality of polarized channels wherein each polarized channel is comprised of one of a plurality of non-overlapping channels within said frequency spectrum in either a first or a second polarization wherein said first and second polarizations are orthogonal;
a plurality of cell types wherein each of the plurality of cell types is assigned a number of polarized channels of the first of said orthogonal polarizations and an equal number of polarized channels of the second of said orthogonal polarizations such that each one of said plurality of polarized channels is assigned to only one cell type, whereby the polarized channels assigned to a one of the plurality of cell types provides communication links within each cell between the base station and the remote stations of said each cell of said one of the plurality of cell types;
a plurality of groups of cells wherein each one of the plurality of groups of cells contains cells of only one cell type; and
a contiguous pattern of cells comprised of said plurality of groups of cells wherein said contiguous pattern of cells is arranged such that no adjoining cells are of the same cell type, thereby creating a frequency re-use pattern. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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23. A method of designing a frequency re-use pattern for a communication frequency spectrum for a point to multipoint wireless communication system comprising plural cells each divided into plural primary sectors wherein each of the plural cells includes a base station located proximate to the geometric center of the cell and one or more remote stations distributed within the cell, said method comprising the steps of:
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providing a plurality of polarized channels wherein each polarized channel is comprised of one of a plurality of non-overlapping channels within said frequency spectrum in either a first or a second polarization wherein said first and second polarizations are orthogonal;
providing a plurality of cell types wherein each of the plurality of cell types is assigned a number of polarized channels of the first of said orthogonal polarizations and an equal number of polarized channels of the second of said orthogonal polarizations such that each one of said plurality of polarized channels is assigned to only one cell type, whereby the polarized channels assigned to a one of the plurality of cell types provides communication links within each cell between the base station and the remote stations of said each cell of said one of the plurality of cell types;
providing a plurality of groups of cells wherein each one of the plurality of groups of cells contains cells of only one cell type; and
arranging the cells in a contiguous pattern of cells comprised of said plurality of groups of cells wherein said contiguous pattern of cells is arranged such that no adjoining cells are of the same cell type, thereby creating a frequency re-use pattern.
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Specification