Portable communication device and communication system

1. A portable communication device, comprising:

a portable communication device-side two-way communication circuit configured to communicate data with a fixed communication device through two-way wireless communication;

a stasis and movement determining circuit configured to convert a change of position of the portable communication device into a respective electric signal, and to determine from the electric signal whether the portable communication device is in a moving state or a stationary state in which the portable communication device does not change the position for a set length of time; and

a portable communication device-side communication control device configured to suspend operation of the portable communication device-side two-way communication circuit when the portable communication device is determined to be in the stationary state and communication with the fixed communication device is currently not executable, and configured to activate the portable communication device-side two-way communication circuit when a shift of the portable communication device to the moving state is detected while the operation of the portable communication device-side two-way communication circuit is suspended.

2. The portable communication device according to claim 1 ,

wherein the portable communication device-side two-way communication circuit comprises a first BLE communication circuit compliant with a communication standard of Bluetooth Low Energy, and

wherein the portable communication device-side communication control device is configured to:

suspend operation of the stasis and movement determining circuit in a communication executable state, which is a state in which the first BLE communication circuit is connected for communication to a second BLE communication circuit of the fixed communication device; and

activate the stasis and movement determining circuit in a communication not executable state, which is a state in which there is no connection for communication between the first BLE communication circuit and the second BLE communication circuit.

3. The portable communication device according to claim 1 ,

wherein the portable communication device-side two-way communication circuit comprises a first BLE communication circuit compliant with a communication standard of Bluetooth Low Energy, and

wherein the portable communication device-side communication control device is configured to:

suspend operation of the stasis and movement determining circuit when the first BLE communication circuit is currently capable of communicating with at least one of a second BLE communication circuit of the fixed communication device and a portable terminal-side two-way communication circuit of a portable terminal, wherein the portable terminal-side two-way communication circuit is compliant with the communication standard of Bluetooth Low Energy; and

activate the stasis and movement determining circuit when a shift to a communication not executable state occurs in which the first BLE communication circuit is not connected to the second BLE communication circuit and the portable terminal-side two-way communication circuit.

4. The portable communication device according to claim 1 ,

wherein the portable communication device-side two-way communication circuit comprises a two-way ultra-high frequency (UHF) communication circuit which communicates a wireless signal in a UHF band, and

wherein the portable communication device-side communication control device is configured to:

cause, when the stationary state is detected by the stasis and movement determining circuit, the two-way UHF communication circuit to transmit and receive a signal for checking a communication connection with a fixed communication device-side two-way UHF communication circuit, and to suspend the operation of the two-way UHF communication circuit when the two-way UHF communication circuit is outside a communication range with the fixed communication device-side two-way UHF communication circuit and is in a communication not executable state; and

activate the two-way UHF communication circuit when a shift from the stationary state to the moving state is detected by the stasis and movement determining circuit.

5. The portable communication device according to claim 1 , wherein the portable communication device comprises a smart phone.

6. The portable communication device according to claim 2 , wherein the portable communication device comprises a smart phone.

7. The portable communication device according to claim 1 , wherein the stasis and movement determining circuit comprises:

an acceleration detecting circuit configured to output, as an electric signal, presence or absence of acceleration equal to or greater than a set value;

a long-running timer configured to output, as an electric signal, a movement detection period used to determine whether or not the portable communication device is in the stationary state; and

a stasis determining circuit configured to output a result of determining, from the electric signal output by the acceleration detecting circuit and the electric signal output by the long-running timer, whether the portable communication device is in the stationary state or the moving state.

8. The portable communication device according to claim 1 ,

wherein the fixed communication device is configured to control in-vehicle equipment, and

wherein the portable communication device and the fixed communication device are configured to wirelessly exchange control data about the in-vehicle equipment.

9. A portable communication device, comprising:

a portable communication device-side two-way communication circuit configured to communicate data wirelessly with a fixed communication device;

an LF reception circuit configured to process reception of an LF band signal that is transmitted by an LF transmission circuit of the fixed communication device;

a stasis and movement determining circuit configured to convert a change of position of the portable communication device into a respective electric signal, and to determine from the electric signal whether the portable communication device is in a moving state or a stationary state in which the portable communication device does not change the position for a set length of time; and

a portable communication device-side communication control device configured to:

suspend operation of the portable communication device-side two-way communication circuit when the portable communication device is determined to be in the stationary state and communication with the fixed communication device is currently not executable, and

activate the portable communication device-side two-way communication circuit in response to at least one of:

a shift of the portable communication device to the moving state being detected while the portable communication device-side two-way communication circuit is suspended, and

the LF reception circuit receives the LF band signal from the LF transmission circuit of the fixed communication device.

10. The portable communication device according to claim 9 ,

wherein the portable communication device-side two-way communication circuit comprises a first BLE communication circuit compliant with a communication standard of Bluetooth Low Energy, and

wherein the portable communication device-side communication control device is configured to:

suspend operation of the stasis and movement determining circuit in a communication executable state, which is a state in which the first BLE communication circuit is connected for communication to a second BLE communication circuit of the fixed communication device; and

activate the stasis and movement determining circuit in a communication not executable state, which is a state in which no connection exists for communication between the first BLE communication circuit and the second BLE communication circuit.

11. The portable communication device according to claim 9 ,

wherein the portable communication device-side two-way communication circuit comprises a first BLE communication circuit compliant with a communication standard of Bluetooth Low Energy, and

wherein the portable communication device-side communication control device is configured to:

suspend operation of the stasis and movement determining circuit when the first BLE communication circuit is currently capable of communicating with at least one of a second BLE communication circuit of the fixed communication device and a portable terminal-side two-way communication circuit of a portable terminal, wherein the portable terminal-side two-way communication circuit is compliant with the communication standard of Bluetooth Low Energy; and

activate the stasis and movement determining circuit when a shift to a communication not executable state occurs in which the first BLE communication circuit is not connected to the second BLE communication circuit and the portable terminal-side two-way communication circuit.

12. The portable communication device according to claim 9 ,

wherein the portable communication device-side two-way communication circuit comprises a two-way ultra-high frequency (UHF) communication circuit which communicates a wireless signal in a UHF band, and

wherein the portable communication device-side communication control device is configured to:

cause, when the stationary state is detected by the stasis and movement determining circuit, the two-way UHF communication circuit to transmit and receive a signal for checking a communication connection with a fixed communication device-side two-way UHF communication circuit, and to suspend the operation of the two-way UHF communication circuit when the two-way UHF communication circuit is outside a communication range with the fixed communication device-side two-way UHF communication circuit and is in a communication not executable state; and

activate the two-way UHF communication circuit in response to at least one of:

where a shift from the stationary state to the moving state is detected by the stasis and movement determining circuit, and

where the LF reception circuit receives the LF band signal from the LF transmission circuit of the fixed communication device.

13. The portable communication device according to claim 9 , wherein the stasis and movement determining circuit comprises:

an acceleration detecting circuit configured to output, as an electric signal, presence or absence of acceleration equal to or greater than a set value;

a long-running timer configured to output, as an electric signal, a movement detection period used to determine whether or not the portable communication device is in the stationary state; and

a stasis determining circuit configured to output a result of determining, from the electric signal output by the acceleration detecting circuit and the electric signal output by the long-running timer, whether the portable communication device is in the stationary state or the moving state.

14. The portable communication device according to claim 9 ,

wherein the fixed communication device is configured to control in-vehicle equipment, and

wherein the portable communication device and the fixed communication device are configured to wirelessly exchange control data about the in-vehicle equipment.

15. A communication system, comprising a combination of the portable communication device and the fixed communication device of claim 1 .

16. A communication system, comprising a combination of the portable communication device and the fixed communication device of claim 9 .