A method and apparatus for reducing signal interference within a cellular
radio system to increase both coverage and capacity. The method and
apparatus include altering the direction of beams within cell sectors is
among discrete angular positions according to a predetermined, cyclic
pattern. The predetermined, cyclic pattern varies in a group of adjacent
cell sectors such that inter-cell interference is significantly reduced
or eliminated by rotating at a different cycle the beams in adjacent
cells. This discrete, angular movement of beams provides for downlink
transmissions to be timed in such a way (i.e., scheduled) such that
transmission to a user will occur in accordance with the beam and time
slot having the best carrier to interference (C/I) ratio for that user.