| 摘要 |
In a carrier allocation scheme for a cellular communications system, cells are divided into groups of different types (CG 1 , CG 2 , CG 3 , CG 4 ) and carriers (f<SUB>xyz</SUB>) are divided into sets (f<SUB>1yz</SUB>, f<SUB>2yz</SUB>, f<SUB>3yz</SUB>, f<SUB>4yz</SUB>) allocated respectively to the different types. Carriers may be re-used between different groups of the same type, and optionally within a group, subject to a minimum re-use distance rule. The allocation patterns may he varied independently between different groups of the same type. The scheme may be adapted to the demand for carriers over a predetermined period. Different allocation schemes applied to different carriers may be overlaid on the same cells. Different allocation schemes may be applied to different cells, provided that the minimum re-use distance rule is obeyed between schemes. The scheme may be applied to spot beams of a satellite communications system, or cells of a terrestrial cellular system.
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