In-vehicle wireless communications device
AssigneeDenso Corporation
InventorKoji Shinoda
Life of this patent
Estimating the term…
Abstract
An in-vehicle wireless communications device executes an emergency report operation to transmit an emergency report signal from a wireless communications unit to a wireless communications network. During this emergency report operation, integrated electric currents from an in-vehicle battery to an in-vehicle wireless communications device reach a predetermined value, which generates an interrupt. Even at this time, stopping of an operation power from the in-vehicle battery to the wireless communications unit is suspended until the emergency report operation is normally finished.
Claims2
An in-vehicle wireless communications device, comprising:
- a wireless communications unit for transmitting a signal of an emergency report to a wireless communications network;
- a power supply unit for supplying an operation power to the wireless communications unit by using an in-vehicle battery;
- an electric current integrating unit for
- computing an electric current integration value by integrating electric currents from the in-vehicle battery when the in-vehicle battery is discharged and
- generating an interrupt when the electric current integration value reaches a predetermined value;
- and
- a control unit for
- starting an operation of the emergency report to cause the wireless communications unit to transmit the signal when a start trigger of the operation generates while the wireless communications unit is supplied with the operation power, and
- being enabled to cause the power supply unit to stop supplying the operation power when the interrupt is generated, wherein
- the control unit suspends, while the operation is executed, causing the power supply unit to stop supplying the operation power when the interrupt is generated, and then causes, after the operation is normally finished, the power supply unit to stop supplying the operation power.
Dependencies are inferred from the claim text.