Information update apparatus and information update method

1. An information update apparatus that updates first information stored in a vehicle control apparatus to second information, the information update apparatus comprising:

a download control unit that receives an update package including an update body that is a difference between the first information and the second information or the second information, procedure information including a procedure for updating the first information to the second information using the update body, and an activation condition that is a condition of starting updating the first information to the second information;

wherein the first information and the second information are stored in an automatic driving electrical control unit (ECU) update script;

an event management unit that acquires a state of a vehicle on which the vehicle control apparatus and the information update apparatus are mounted, and causes an update execution unit to execute the update based on the procedure information when the state of the vehicle matches the activation condition,

wherein the update package includes a plurality of sets of the update body, the procedure information, and the activation condition, and the update package further includes information indicating a correspondence relationship between the plurality of pieces of procedure information and the plurality of activation conditions,

the activation condition is a combination of an event that triggers execution of the update and an execution order, and

when events included in the plurality of activation conditions are the same, the event management unit determines an order of the procedure information for causing the update execution unit to execute the update based on the execution order.

2. The information update apparatus according to claim 1 , further comprising:

the update execution unit that executes the update based on the procedure information.

3. The information update apparatus according to claim 2 , wherein the update execution unit interrupts the update in a predetermined case.

4. The information update apparatus according to claim 3 , wherein the update package includes an interruption condition that is a condition of interrupting the update,

the event management unit outputs an update interruption command to the update execution unit when the state of the vehicle matches the interruption condition, and

the update execution unit interrupts the update when the update interruption command is received from the event management unit.

5. The information update apparatus according to claim 3 , wherein the procedure information includes processing of interrupting the update, and

the update execution unit interrupts the update based on the procedure information.

6. The information update apparatus according to claim 2 , wherein

the update package includes a target list that is a list of vehicle control apparatuses to be updated, and verification information used for verification of the target list, and

the information update apparatus further includes a security filter that verifies the target list using the verification information and stops the update by the update execution unit when the vehicle control apparatus updated based on the procedure information is not included in the verified target list.

7. The information update apparatus according to claim 2 , wherein the activation condition includes turning ON an ignition or turning OFF the ignition in the vehicle.

8. The information update apparatus according to claim 1 , wherein the update execution unit may update a plurality of pieces of the first information in parallel based on the plurality of pieces of the procedure information.

9. The information update apparatus according to claim 2 , wherein the activation condition includes completion of reception of the update package.

10. An information update method in which a computer updates first information stored in a vehicle control apparatus to second information, the information update method comprising:

receiving an update package including an update body that is a difference between the first information and the second information or the second information, procedure information including a procedure for updating the first information to the second information using the update body, and an activation condition that is a condition of starting updating the first information to the second information; and acquiring a state of a vehicle on which the vehicle control apparatus and the computer are mounted, and causing an update execution unit to execute the update based on the procedure information when the state of the vehicle matches the activation condition;

wherein the update package includes a plurality of sets of the update body, the procedure information, and the activation condition, and the update package further includes information indicating a correspondence relationship between the plurality of pieces of procedure information and the plurality of activation conditions,

the activation condition is a combination of an event that triggers execution of the update and an execution order,

the first information and the second information are stored in an automatic driving electrical control unit (ECU) update script, and

when events included in the plurality of activation conditions are the same, the event management unit determines an order of the procedure information for causing the update execution unit to execute the update based on the execution order.