Vehicle control apparatus, vehicle control method, recording medium with program for control recorded, and vehicle control system

1. A vehicle control apparatus comprising a central processing unit (CPU) including:

a vehicle communication control unit performing communication with a mobile terminal used by a user of a vehicle when the mobile terminal positions within an out-vehicle communication area within a predetermined distance from the vehicle;

a distance measuring unit measuring a vehicle-terminal distance, the vehicle-terminal distance being a distance between the vehicle and the mobile terminal; and

a distance measurement control unit measuring the vehicle-terminal distance by switching, based on a predetermined condition, between a first distance measurement mode repeatedly measuring the vehicle-terminal distance by the distance measuring unit without depending on reception, by the vehicle communication control unit, of measurement instruction information transmitted from the mobile terminal and a second distance measurement mode measuring the vehicle-terminal distance by the distance measuring unit in response to reception, by the vehicle communication control unit, of the measurement instruction information transmitted from the mobile terminal when communication is established between the vehicle communication control unit and the mobile terminal.

2. The vehicle control apparatus according to claim 1 , wherein the CPU further includes:

a use estimated time period setting unit setting a use estimated time period being a period when it is estimated that the user uses the vehicle,

wherein, as the predetermined condition, a first predetermined condition that a current time is within the use estimated time period is set, and

the distance measurement control unit performs measurement of the vehicle-terminal distance by the first distance measurement mode if the first predetermined condition is satisfied.

3. The vehicle control apparatus according to claim 2 , wherein the CPU further includes:

a locked/unlocked time recognizing unit recognizing a time when the vehicle is unlocked or locked,

wherein the use estimated time period setting unit sets the use estimated time period based on a time when the vehicle is unlocked or locked recognized by the locked/unlocked time recognizing unit.

4. The vehicle control apparatus according to claim 2 , wherein the CPU further includes:

a schedule information obtaining unit obtaining schedule information including an action plan of the user,

wherein the use estimated time period setting unit sets the use estimated time period based on the schedule information obtained by the schedule information obtaining unit.

5. The vehicle control apparatus according to claim 2 , wherein the CPU further includes:

a vehicle use presence/absence recognizing unit recognizing whether the vehicle is in use or not,

wherein the distance measurement control unit performs measurement of the vehicle-terminal distance by the second distance measurement mode next time in a time period set as the use estimated time period if use of the vehicle is not recognized by the vehicle use presence/absence recognizing unit within the use estimated time period.

6. The vehicle control apparatus according to claim 2 , wherein the CPU further includes:

a vehicle use presence/absence recognizing unit recognizing whether the vehicle is in use or not; and

a vehicle use plan information obtaining unit, if use of the vehicle is not recognized by the vehicle use presence/absence recognizing unit within the use estimated time period, transmitting vehicle use inquiry information inquiring about a plan for using the vehicle to the mobile terminal and obtaining, through the vehicle communication control unit, vehicle use answer information transmitted from the mobile terminal in response to reception of the vehicle use inquiry information,

wherein the use estimated time period setting unit changes the use estimated time period based on the vehicle use answer information.

7. The vehicle control apparatus according to claim 1 , wherein the distance measurement control unit performs measurement of the vehicle-terminal distance or limitation of measurement of the vehicle-terminal distance by switching, based on the predetermined condition, among a third distance measurement mode limiting measurement of the vehicle-terminal distance by the distance measuring unit, the first distance measurement mode and the second distance measurement mode.

8. The vehicle control apparatus according to claim 7 , wherein the CPU further includes:

a vehicle use presence/absence recognizing unit recognizing whether the vehicle is in use or not,

wherein, as the predetermined condition, a second predetermined condition is set, the second predetermined condition being that a state where it is recognized by the vehicle use presence/absence recognizing unit that the vehicle is not used continues for a predetermined period of time or longer, and

the distance measurement control unit limits measurement of the vehicle-terminal distance by switching to the third distance measurement mode if the second predetermined condition is satisfied while measurement of the vehicle-terminal distance is being performed by the first distance measurement mode or the second distance measurement mode.

9. The vehicle control apparatus according to claim 7 , wherein the CPU further includes:

a non-use estimated time period setting unit setting a non-use estimated time period being a time period estimated as that the user does not use the vehicle,

wherein, as the predetermined condition, a third predetermined condition that a current time is within the non-use estimated time period is set, and

if the third predetermined condition is satisfied, the distance measuring unit limits measurement of the vehicle-terminal distance by the third distance measurement mode.

10. A vehicle control method to be executed by a vehicle control apparatus performing communication with a mobile terminal used by a user of a vehicle, the method comprising:

a vehicle communication control step of performing communication with the mobile terminal when the mobile terminal positions within an out-vehicle communication area within a predetermined distance from the vehicle;

a distance measuring step of measuring a vehicle-terminal distance, the vehicle-terminal distance being a distance between the vehicle and the mobile terminal; and

a distance measurement control step of measuring the vehicle-terminal distance by switching, based on a predetermined condition, between a first distance measurement mode repeatedly measuring the vehicle-terminal distance by the distance measuring step without depending on reception, by the vehicle communication control step, of measurement instruction information transmitted from the mobile terminal and a second distance measurement mode measuring the vehicle-terminal distance by the distance measuring step in response to reception, by the vehicle communication control step, of the measurement instruction information transmitted from the mobile terminal when communication is established between the vehicle control apparatus and the mobile terminal by the vehicle communication control step.

11. A non-transitory computer readable recording medium with a program for control recorded, the recording media being installed in a vehicle control apparatus performing communication with a mobile terminal used by a user of a vehicle, the program causing the vehicle control apparatus to function as:

a vehicle communication control unit performing communication with the mobile terminal when the mobile terminal positions within an out-vehicle communication area within a predetermined distance from the vehicle;

a distance measuring unit measuring a vehicle-terminal distance, the vehicle-terminal distance being a distance between the vehicle and the mobile terminal; and

a distance measurement control unit measuring the vehicle-terminal distance by switching, based on a predetermined condition, between a first distance measurement mode repeatedly measuring the vehicle-terminal distance by the distance measuring unit without depending on reception, by the vehicle communication control unit, of measurement instruction information transmitted from the mobile terminal and a second distance measurement mode measuring the vehicle-terminal distance by the distance measuring unit in response to reception, by the vehicle communication control unit, of the measurement instruction information transmitted from the mobile terminal when communication is established between the vehicle communication control unit and the mobile terminal.

12. A vehicle control system comprising:

a mobile terminal used by a user of a vehicle; and

a vehicle control apparatus mounted on the vehicle and having a central processing unit (CPU) that includes a vehicle communication control unit performing communication with the mobile terminal, and a distance measuring unit measuring a vehicle-terminal distance, the vehicle-terminal distance being a distance between the vehicle and the mobile terminal,

wherein the mobile terminal and the vehicle communication control unit establish communication when the mobile terminal positions within an out-vehicle communication area of the vehicle communication control unit within a predetermined distance from the vehicle,

the mobile terminal transmits, to the vehicle communication control unit, measurement instruction information instructing to measure the vehicle-terminal distance by the distance measuring unit if a predetermined distance measurement execution condition is satisfied, and

the CPU of the vehicle control apparatus has a distance measurement control unit measuring the vehicle-terminal distance by switching, based on a predetermined condition, between a first distance measurement mode repeatedly measuring the vehicle-terminal distance by the distance measuring unit without depending on reception, by the vehicle communication control unit, of the measurement instruction information transmitted from the mobile terminal and a second distance measurement mode measuring the vehicle-terminal distance by the distance measuring unit in response to reception, by the vehicle communication control unit, of the measurement instruction information transmitted from the mobile terminal when communication is established between the vehicle communication control unit and the mobile terminal.