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US 6,388,998 B1Granted
Reuse of codes and spectrum in a CDMA system with multiple-sector cells
AssigneeLucent Technologies Inc.
InventorSanjay Kasturia
Life of this patent
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AssigneeLucent Technologies Inc.
InventorSanjay Kasturia
Estimating the term…
A system and a method for code division multiple access (CDMA) communication. The system includes fixed terminals communicating with a central base station. The terminals in protection sectors of each sector are configured to employ codes from different sets of codes to overcome potential mutual interference between sectors on account of antenna radiation pattern roll-off. The remaining codes, preferably the majority of the available codes, are used in any one of a plurality of basic sectors, each of which separates the protection sectors of a respective sector. For an even number of sectors in a cell, the available codes are partitioned into three groups, two for the protection sectors and one for the basic sectors. For an odd number of sectors in a cell, the available codes are partitioned into four groups, three for the protection sectors and one for the basic sectors. Protection sectors are relatively narrow but broad enough to counteract the potential mutual interference between sectors.
A code division multiple access communication system, comprising:
A method for use in a code division multiple access communication system having at least one base station in a cell communicating with a plurality of fixed terminals in a plurality of sectors of the cell, each of said sectors including two protection sectors and a basic sector between the two protection sectors, each of the two protection sectors being narrower than the basic sector, said method for improving use of codes by the terminals and comprising the steps of:
A method for use in a code division multiple access communication system having at least one base station in a cell communicating with a plurality of fixed termials in a plurality of sectors of the cell, each of said sectors including two protection sectors and a basic sector between the two protection sectors, each of the two protection sectors being narrower than the basic sector, said method being for improving use of codes by the terminals and comprising the steps of:
Dependencies are inferred from the claim text.