Patent ID: 7149477
Filing Date: 2006-12-12
Classification: H04W

Abstract:
1. A system for controlling radio parameters for use in radio communication between a base station and a mobile station, comprising: a plurality of mobile stations, each of which has a position detector for detecting a current location of its own; a plurality of base stations each forming a plurality of radio zones, in which a mobile station is allowed to communicate with a corresponding base station, wherein each of the base stations periodically transmits a down-link reference signal; a plurality of fixed stations, which are distributed at predetermined locations in a service area composed of the plurality of radio zones, wherein each of the fixed stations receives the down-link reference signal from a corresponding base station to produce received-signal condition data of the down-link reference signal; a statistical analyzer for statistically analyzing the received-signal condition data received from each of the plurality of fixed stations to store statistical condition data at each of the fixed stations in a statistical condition memory; a mobile-station movement estimator for estimating a future location of the mobile station based on detected current locations of the mobile station and the predetermined locations of the fixed stations; and a parameter controller for controlling radio parameters for use in radio communication between the mobile station and a base station corresponding to the future location of the mobile station based on statistical condition data at the future location of the mobile station.