Patent ID: 6055432
Filing Date: 2000-04-25
Classification: H04W

Abstract:
A apparatus of providing Dynamic Channel Assignment (DCA) for at least a part of an overlay macrocellular system to facilitate the coexistence of at least one autonomous underlay system, comprising the steps ofexcluding a predetermined number of channels from one or more macrocells of the overlay system which overlap one or more cells of the at least one underlay system, where E.sub.i is the set of channels to be excluded from a macrocell i of the overlay system,allocating the excluded predetermined number of channels to the underlay system or allowing those channels to be scanned and seized by the at least one underlay system, where N.sub.min is the minimum number of channels available for the underlay system and whereinthe predetermined number of channels to be excluded are selected randomly and distributively in the one or more macrocells of the overlay system so as to statistically satisfy both ##EQU23## where P is any cluster set of mutually adjacent three macrocells, and ##EQU24## where .PHI. is the null set and where .OMEGA. is a set of macrocells belonging to a universal cluster, the universal cluster being the minimal set of clustered macrocells with no common exclusion channels.