Patent ID: 6393303
Filing Date: 2002-05-21
Classification: H04B,H04W

Abstract:
A method of directional radio communication between a first station and a second station, said method comprising the steps of:receiving at said first station a first signal transmitted from said second station, said first signal being receivable from a plurality of different directions; determining a principal beam direction from which said first signal is received by said first station; defining at the first station a plurality of beam directions for transmitting a radiation beam, wherein each of said beam directions is selectable; and selecting at said first station said determined principal beam direction and at least one other auxiliary beam direction, said at least one auxiliary beam direction being adjacent to said determined principal beam direction and transmitting a second signal from said first station to said second station in said selected beam directions, wherein the transmission power in each of said beam directions is individually determinable and wherein the strength of the second signal transmitted in said at least one auxiliary direction is less than or equal to the strength of the second signal transmitted in said determined principal direction, and wherein the ratio of the strength of the second signal transmitted in said at least one auxiliary direction to the strength of the second signal transmitted in said determined principal direction is proportional to the ratio of the strength of the first signal received by said first station from said at least one auxiliary direction to the strength of the first signal received by the first station in said determined principal direction.