Patent ID: 9668218
Date: 2017-05-30
CPC Classifications: H04B,H04W,Y02D

Claim:
1. A vehicle-mounted communication device comprising: a controlling unit; a modem connected to the controlling unit to receive control data and performing wireless communication; and a power source switching unit connected to the modem and the controlling unit, and performing a supply of electric power, wherein the controlling unit includes a communication part, a judgment part, and a judging timing determination part, the communication part performs wireless communication through the modem, the judgment part controls the modem and judges whether the communication part is in a wireless communicable state in accordance with communication propriety information transmitted from the modem, the judging timing determination part controls the power source switching unit to shift to a first low power consumption mode for limiting the supply of the electric power when the judging timing determination part receives the communication propriety information showing a communicable state in the wireless communication from the judgment part while a driving source of a vehicle is stopped, and the judging timing determination part controls the power source switching unit to shift to a second low power consumption mode when the judging timing determination part receives the communication propriety information showing an incommunicable state in the wireless communication from the judgment part while the driving source of the vehicle is stopped, and stops the judgment part from operating of judging whether the communication part is in the wireless communicable state by operating the communication part, until a condition predetermined based on a change in a reception electric field intensity of a portable communication network before the driving source of the vehicle is stopped is satisfied.