Patent ID: 6587679
Filing Date: 2003-07-01
Classification: H04W,Y02D

Abstract:
An apparatus for scanning signals received by a wireless telephone, comprising:(a) a monitor having a first monitor mode where an input signal received through an antenna is monitored at every first period of time and a second monitor mode where said input signal is monitored at every second period of time longer than said first period of time; (b) a mode keeper for, while said monitor is set in said first monitor mode, keeping said monitor in said first monitor mode when any input signal, whether having electric field level either greater than or smaller than a threshold level, is monitored in a third period of time longer than said first period of time; and (c) a mode changer for, while said monitor is set in said first monitor mode, changing said first monitor mode to said second monitor mode when said input signal is not monitored in said third period of time.