Method and apparatus for configuring PN-offsets for a non-uniform CDMA cellular network
First Claim
1. A method for configuring a spread spectrum cellular network, the method comprising the steps of:
- providing a finite series of PN-offsets, each of the PN-offsets being separated by a value that is determined for the spread spectrum cellular network;
portioning the finite series of PN-offsets into a first and a second set, the second set subsequent to the first set and having sufficient PN-offset elements for a PN-offset reuse pattern having a plurality of cells;
assigning the first set to a first PN-offset reuse pattern, wherein the first PN-reuse pattern is employed for with a plurality of groups of a plurality of small cells; and
assigning the second set to a second PN-offset muse pattern, the second PN-offset reuse pattern coexistent with the first PN-offset reuse pattern, wherein the second PN-reuse pattern is employed for a plurality of groups of a plurality of large cells sharing a service coverage area with the plurality of groups of a plurality of small cells.
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Abstract
A method for configuring a spread spectrum cellular network for small-cell inclusion, by providing a finite series of PN-offsets, each PN-offset is separated by a constant value that is allotted to the spread spectrum cellular network. The finite series is portioned into a first and a second set. The second set subsequent to the first set and having sufficient PN-offset elements for a PN-offset reuse pattern having a plurality of cells, each cell having similar transmission characteristics. The second set is assigned to the PN-offset reuse pattern, deploying the cellular reuse pattern for a cellular network. Small cells are insertable into the spread spectrum cellular network by assigning the first set to a PN-offset reuse pattern having a plurality of small cells arranged in a small-cell reuse pattern, and deploying the small-cell reuse pattern. In another aspect, the method for configuring the spread spectrum cellular network involves sectoring each cell of the plurality of cells into a plurality of sectors. The sectored cells are assigned PN-offsets adjacent in the finite series together in each sector of the sectored cell while maintaining sufficient distance between cells that reuse an assigned PN-offset.
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Citations
8 Claims
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1. A method for configuring a spread spectrum cellular network, the method comprising the steps of:
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providing a finite series of PN-offsets, each of the PN-offsets being separated by a value that is determined for the spread spectrum cellular network;
portioning the finite series of PN-offsets into a first and a second set, the second set subsequent to the first set and having sufficient PN-offset elements for a PN-offset reuse pattern having a plurality of cells;
assigning the first set to a first PN-offset reuse pattern, wherein the first PN-reuse pattern is employed for with a plurality of groups of a plurality of small cells; and
assigning the second set to a second PN-offset muse pattern, the second PN-offset reuse pattern coexistent with the first PN-offset reuse pattern, wherein the second PN-reuse pattern is employed for a plurality of groups of a plurality of large cells sharing a service coverage area with the plurality of groups of a plurality of small cells. - View Dependent Claims (2, 3, 4)
the first PN-reuse pattern has a first spacing between PN-offsets;
the second PN-reuse pattern has a second spacing between PN-offsets; and
the second spacing is greater than the first spacing.
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3. The method of claim 1 further comprising:
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sectoring each small cell into a plurality of small cell sectors; and
assigning PN-offsets adjacent in the finite series to adjacent small cell sectors while maintaining sufficient distance between cells that reuse an assigned PN-offset.
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4. The method of claim 1 further comprising:
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sectoring each large cell into a plurality of large cell sectors; and
assigning PN-offsets adjacent in the finite series to adjacent large cell sectors while maintaining sufficient distance between cells that reuse an assigned PN-offset.
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5. A spread spectrum cellular communication system comprising:
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a first plurality of base stations, each servicing a small cell;
a second plurality of base stations, each servicing a large cell;
wherein each of the first plurality of base stations employs a PN-offset taken from a first PN-offset reuse pattern;
wherein each of the second plurality of base stations employs a PN-offset taken from a second PN-offset reuse pattern;
wherein the first PN-reuse pattern and the second PN-reuse pattern together form a finite series of PN-offsets, wherein the PN-offsets of the finite series of PN-offsets are separated by a value that is determined for the spread spectrum cellular network; and
wherein the plurality of groups of the plurality of large cells share a service coverage area with the plurality of groups of the plurality of small cells. - View Dependent Claims (6, 7, 8)
the first PN-reuse pattern has a first spacing between PN-offsets;
the second PN-reuse pattern has a second spacing between PN-offsets; and
the second spacing is greater than the first spacing.
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7. The spread spectrum cellular communication system of claim 5, wherein:
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some of the small cells are sectored into a plurality of small cell sectors; and
adjacent small cell sectors are assigned PN-offsets that are adjacent in the finite series while sufficient distance between cells that reuse an assigned PN-offset are maintained.
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8. The spread spectrum cellular communication system of claim 5, wherein:
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some of the large cells are sectored into a plurality of large cell sectors; and
adjacent large cell sectors are assigned PN-offsets that are adjacent in the finite series while sufficient distance between cells that reuse an assigned PN-offset are maintained.
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Specification