METHOD FOR ELECTRIC POWER SAVING OF CORDLESS COMMUNICATION SYSTEM AND DEVICE AND SYSTEM USING IT

摘要

PURPOSE: To reduce the power consumption of a receiver by varying the scanning frequency of an incoming according to the history of stand-by time in the stand-by time of the communication system of a battery power source. CONSTITUTION: The suspension time controller 1563 of a power saving circuit 156 sets a suspending mode to be a first delay level to enter a suspending mode. After a time based on the set of the suspending mode, the message scanner 101 of the receiver operates to enter a scanning mode to obtain whether or not a calling comes. At the time of YES, the suspending mode sets the first level again. When a call incoming is not made, a stand-by history is read from a stand-by recorder 1562 and the count of an accumulator 1561 is increased by 1 to update a history recorder. The first delay level is continuously kept until a first time zone corresponding to the first delay level and corresponding to the interval of 0 or 2 hours finishes or a sending call is executed.