Patent ID: 6229796
Filing Date: 2001-05-08
Classification: H04J,H04W

Abstract:
A cellular radiotelephone system comprising:a plurality of code division multiple access (CDMA) cellular radiotelephone base stations for communicating with cellular radiotelephones on a plurality of frequencies using a plurality of spreading codes, each of said plurality of spreading codes having a period;code synchronizing means for synchronizing said plurality of spreading codes among said plurality of base stations so that said periods of each of said plurality of spreading codes are concurrent, to produce synchronized spreading codes among said plurality of base stations; andcode-reuse partitioning means for allocating cellular radiotelephone frequencies among said plurality of base stations for a first one of said synchronized spreading codes according to a first frequency allocation system and for allocating frequencies among said plurality of base stations for a second one of said synchronized spreading codes according to a second frequency allocation system different from said first frequency allocation system.