Patent ID: 7787821
Filing Date: 2010-08-31
Classification: H04M,H04W,Y02D

Abstract:
1. An information terminal device having a display, comprising: (a) a data communication unit capable of switching between an active state and an inactive state and performing radio data communication with another information terminal device; (b) a low-power communication unit capable of performing radio communication with said another information terminal device with power consumption smaller than that of said data communication unit; and (c) a controller which sets said data communication unit to said inactive state except for a communication process period in which process necessary for said data communication is performed, start timing and/or end timing of said communication process period being able to be obtained by said low-power communication unit, wherein in the case where a predetermined radio signal transmitted from said low-power communication unit of said another information terminal device is received by said low-power communication unit, said controller determines that it is said start timing of said communication process period and sets said data communication unit to said active state.