Patent ID: 6311059
Filing Date: 2001-10-30
Classification: H04B,H04W,Y02D

Abstract:
A mobile radio station comprising:a measuring unit, provided with a full monitoring mode which measures reception field strengths of a signal transmitted from a maximum number of previously determined radio base stations from among neighboring radio base stations, and a reduced monitoring mode which measures a reception field strength of a signal transmitted from a number of radio base stations less than said maximum number from among neighboring radio base stations, and periodically measures a reception field strength of a current cell and of signals transmitted from radio base stations neighboring the current cell by one of said two modes;a determining unit that determines the rate of decrease of the reception field strength of the current cell measured by said measuring unit;a comparator which compares the rate of decrease determined by said determining unit with a threshold that has been previously determined; anda selecting unit that selects said full monitoring mode of said measuring unit when the rate of decrease of reception field strength of the current cell measured by said measuring unit exceeds said threshold, and selecting said reduced monitoring mode when the rate of decrease of reception field strength of the current cell measured by said measuring unit do not exceed said threshold.