Patent ID: 7742767

Claim:
A method of communicating by radio, comprising: sending messages using a frequency band (F) divided into a plurality of subcarriers, either from a base station (BS) to a user station or from the user station to the base station (BS); and processing the received messages using either a first or a second Frequency Division Multiple Access (FDMA) method, wherein the plurality of subcarriers are divided into first, second and third discrete groups, first and second adjacent base stations are in communication with the user station, the first base station using the first, second and third discrete groups of subcarriers, the second base station using the first and third discrete groups of subcarriers, and a different frequency repetition spacing is employed for those subcarriers which are used for communication by the user station at an edge of a radio cell than for the subcarriers which are used for communication by the user station in a remainder of the cell.