Cellular network having cells which are in a specific circular orientation of sectors
First Claim
1. A communication network divided geographically into a plurality of cells, each cell having a base station located substantially at its center, each base station comprising at least three directional antennae, each directional antenna operating in at least one corresponding radial sector of its cell for communicating with at least one unit, said unit including a directional antenna, said network having a plurality of spatially allocated transmission frequencies, wherein:
- all of said frequencies are divided into groups, all of said groups being available in each cell, each of said groups corresponding to at least one of said frequencies;
each sector being assigned with at least one of said frequency groups, wherein each of said sectors including said at least one frequency group are allocated in the same circular order in all cells; and
each cell having a specific circular orientation of said sectors, said specific circular orientation being fixed relative to said network such that in at least two adjacent cells of said network, said antennae of said base stations that operate in a similar frequency group are directed in different directions.
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Abstract
An improved cellular communication network which is divided into a plurality of cells is provided. Each of the cells including a base station has at least two directional antennae, each of which is operative to communicate with a plurality of units. Each of the antennae is directed in a different direction and operates in a different frequency band. A characterisitic of the cellular network is that antennae, in adjacent cells, operating in similar frequency bands are directed in different directions.
29 Citations
11 Claims
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1. A communication network divided geographically into a plurality of cells, each cell having a base station located substantially at its center, each base station comprising at least three directional antennae, each directional antenna operating in at least one corresponding radial sector of its cell for communicating with at least one unit, said unit including a directional antenna, said network having a plurality of spatially allocated transmission frequencies, wherein:
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all of said frequencies are divided into groups, all of said groups being available in each cell, each of said groups corresponding to at least one of said frequencies; each sector being assigned with at least one of said frequency groups, wherein each of said sectors including said at least one frequency group are allocated in the same circular order in all cells; and each cell having a specific circular orientation of said sectors, said specific circular orientation being fixed relative to said network such that in at least two adjacent cells of said network, said antennae of said base stations that operate in a similar frequency group are directed in different directions. - View Dependent Claims (2, 3, 4, 9, 10, 11)
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5. A method for allocating frequencies in a geographically distributed communication network covering an area, comprising the steps of:
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dividing said area into a plurality of cells, each cell having a base station located substantially at its center, each base station comprising at least three directional antennae, each directional antenna operating in at least one corresponding radial sector of its cell for communicating with at least one unit, said unit including a directional antenna, said network having a plurality of spatially allocated transmission frequencies, dividing all of said frequencies into groups, all of said groups being available in each cell, each of said groups corresponding to at least one of said frequencies; assigning each one of said sectors with at least one of said frequency groups, wherein each of said sectors including said at least one frequency are allocated in the same circular order in all cells; and providing for each cell, a specific circular orientation of said sectors that is fixed relative to said network, such that in at least two adjacent cells of said network, said antennae of said base stations that operate in a similar frequency group are directed in different directions. - View Dependent Claims (6, 7, 8)
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Specification