Patent ID: 6577616
Filing Date: 2003-06-10
Classification: H04B,H04W

Abstract:
An apparatus for providing CDMA (code division multiple access) access availability to a cell area having a centre and a radius R, comprising:a plurality of cell site modems configured to look for access attempts generated in respective complete and/or sectorized circular and annular shaped areas centred at said centre, the areas collectively covering the cell area; each cell site modem having a search window capable of searching over a range of distances, a first of said cell site modems being configured to look within a circle of radius W, and subsequent cell site modems being configured to look within respective annular shaped areas which are sequentially increasing in diameter; and a local clock within each cell site modem; wherein the local clock within the first of said cell site modems is synchronized with a standard network time, and the local clock of each of the subsequent cell site modems is offset by a respective delay with respect to the standard network time which causes the cell site modem to search within said respective annular shaped area.