Patent ID: 7526318

Claim:
A mobile station comprising: a signal receiving block intermittently receiving a signal from a base station at a timing specified by said base station; a signal processing block periodically operating a specific task within a time interval; a timer block starting a time count at a specific timing to count up first and second time periods, wherein said timer block judges at a timing of a count up of said first time period whether said signal receiving block is receiving said signal, outputs a count up signal if said signal receiving block is receiving said signal, if said signal receiving block is not receiving said signal, said timer block continues said time count until one of said timer block counts up said second time period, and said receiving block starts for receiving said signal, and outputs a count up signal at a timing of a count up of said second time period without affecting said signal reception, or at a timing of said receiving block starting receiving of said signal without expiring said second time period; and a control block responding to said count up signal to control said signal processing block to operate said specific task, wherein said timer block starts for a time count at an end of operation of said signal processing block, said mobile station includes an IC card storing therein information of a subscriber, and said specific task of said signal processing block is to detect said IC card in said mobile station.