Patent ID: 6038454
Filing Date: 2000-03-14
Classification: H04W

Abstract:
A method for densifying a transmitter and receiver network for mobile telephony, said method comprising the steps of: providing a network of base stations which each have three cells whose directions are mutually spaced by 120 degrees, wherein the three cells associated with a given base station operate on mutually different frequencies and wherein the network includes at least four different base stations that have mutually different frequency-sets in the respective cells, so that the cells associated with the at least four base stations each operate at different frequencies; positioning the base stations in relation to each other so that the cells form an hexagonal pattern with base stations of different frequency-sets being placed in a repetitive pattern generally equidistantly from one another along at least two spaced, generally parallel and straight lines, wherein each alternate base station in a first line has a given first frequency-set and each intervening base station in the first line has a given second frequency-set, wherein each alternate base station in a second line has a given third frequency-set and each intervening base station in the second line has a given fourth frequency-set so that by virtue of the hexagonal pattern of the cells the base stations along one line are displaced in relation to the base stations on an adjacent line by a distance corresponding generally to half the distance between two base stations lying along one and the distance between two base stations lying along one and the same line and so that two consecutive base stations in the first line and two adjacent consecutive base stations in the second line define corners of a generally rhomboidal outer pattern, and a center base station within the generally rhomboidal pattern and having a first frequency-set and wherein the corner base stations each have the same second frequency-set; changing the frequency-set of the center base station to the same frequency-set as that of the corner base stations; providing additional base stations inwardly of the generally rhomboidal pattern; and selecting the frequency-sets of the additional base stations so that the frequencies of their cells differ from the frequencies of the cells of the nearest base stations.