Patent ID: 6052605
Filing Date: 2000-04-18
Classification: H04W

Abstract:
A land mobile radio base site, comprising:a plurality of radio channel units each having a transmit section for transmission of signals;a plurality of antenna means each for transmitting the signals provided by one or another of the radio channel units in a beam direction;control system means for connecting said transmit section of each one of said plurality of radio channel units with any one of said plurality of antenna means; andsaid control system means including interference avoidance means for controlling communications between said plurality of radio channel units of the base site and mobile radio units communicating with the base site so as to avoid causing potential interference at other base sites, wherein said control means further includes at least one memory means for storing information indicative of said potential interference, wherein said information stored in said memory means is weighted based on a relative time said information is stored in said memory means, and wherein said information stored more recently in time is weighted more heavily, and further wherein said information indicates, for a radio channel unit and a beam direction, how often a signal in the beam direction with a signal strength in a predetermined range is received while the radio channel unit is not transmitting on the frequency of the radio channel unit.