Vehicle-mounted device, control method therefor, and vehicle

1. An on-vehicle device comprising:

a driving support device mounted in a vehicle, and configured to receive driving support information from a driving support server and execute a predetermined process for driving support;

a sub driving support server mounted in the vehicle, and including a subset of a function of the driving support server and configured to receive sensor data from an external sensor and generate a subset of the driving support information based on the received sensor data and output the generated subset of the driving support information;

a first switching device configured to give the subset of the driving support information from the sub driving support server, instead of the driving support information from the driving support server, to the driving support device in response to interruption of reception of the driving support information from the driving support server;

a second switching device configured to give the driving support information from the driving support server, instead of the subset of the driving support information from the sub driving support server, to the driving support device in response to recovery of the reception of the driving support information from the driving support server;

a state storage device that stores states inside and outside the on-vehicle device and a cooperative state with another sensor-equipped device on the basis of the driving support information; and

a server reconstruction device that is mounted in the vehicle and is configured to reconstruct the sub driving support server in response to a change in either the states inside and outside the on-vehicle device or the cooperative state with the other sensor-equipped device stored by the state storage device.

2. The on-vehicle device according to claim 1 , wherein

the sub driving support server includes:

a computer; and

a storage device for storing a program to be executed by the computer, and

the on-vehicle device further comprises an installer for installing a program for realizing the sub driving support server in the computer, into the storage device in response to an installation instruction from the sub driving support server.

3. The on-vehicle device according to claim 1 , wherein the server reconstruction device is configured to reconstruct the sub driving support server at a predetermined time interval.

4. The on-vehicle device according to claim 1 , further comprising a background processing execution device for starting the sub driving support server with start of the on-vehicle device and causing the sub driving support server to operate in background of the reception of the driving support information from the driving support server.

5. The on-vehicle device according to claim 1 , wherein

the sub driving support server is set not to start when the on-vehicle device is started, and

the on-vehicle device further comprises a server start device for starting the sub driving support server in response to interruption of the reception of the driving support information from the driving support server.

6. A vehicle comprising:

the on-vehicle device according to claim 1 ; and

a vehicle control device to be supported by the driving support device.

7. A control method for an on-vehicle device, comprising the steps of:

controlling a computer that is mounted in a vehicle to receive driving support information from a driving support server, and execute a process of giving the driving support information to a driving support device that is configured to execute a predetermined process for driving support, the computer including a subset of a function of the driving support server;

receiving sensor data from an external sensor, and starting a sub driving support server that is mounted in the vehicle and configured to generate a subset of the driving support information based on the received sensor data, and output the generated subset of the driving support information;

the computer starting a process of giving the subset of the driving support information from the sub driving support server, instead of the driving support information from the driving support server, to the driving support device in response to interruption of reception of the driving support information from the driving support server;

the computer restarting a process of giving the driving support information from the driving support server, instead of the subset of the driving support information from the sub driving support server, to the driving support device in response to recovery of the reception of the driving support information from the driving support server;

the computer storing, to a state storage device, states inside and outside the on-vehicle device and a cooperative state with another sensor-equipped device on the basis of the driving support information; and

the computer reconstructing the sub driving support server in response to a change in either the states inside and outside the on-vehicle device or the cooperative state with the other sensor-equipped device stored by the state storage device.

8. An on-vehicle device comprising at least one computer with a processor that is mounted in a vehicle that is configured to:

receive driving support information from a driving support server, and execute a process of giving the driving support information to a driving support device that is configured to execute a predetermined process for driving support, the computer including a subset of a function of the driving support server;

receive sensor data from an external sensor, and start a sub driving support server that is mounted in the vehicle and configured to generate a subset of the driving support information based on the received sensor data, and output the generated subset of the driving support information;

start a process of giving the subset of the driving support information from the sub driving support server, instead of the driving support information from the driving support server, to the driving support device in response to interruption of reception of the driving support information from the driving support server;

restart a process of giving the driving support information from the driving support server, instead of the subset of the driving support information from the sub driving support server, to the driving support device in response to recovery of the reception of the driving support information from the driving support server;

the computer storing, to a state storage device, states inside and outside the on-vehicle device and a cooperative state with another sensor-equipped device on the basis of the driving support information; and

the computer reconstructing the sub driving support server in response to a change in either the states inside and outside the on-vehicle device or the cooperative state with the other sensor-equipped device stored by the state storage device.