Vehicle-to-x communication apparatus and method for achieving a safety integrity level in vehicle-to-x communication
A vehicle-to-X communication apparatus including: a reception device to receive a vehicle-to-X message; a first electronic computation device to calculate a hash value for a received vehicle-to-X message; and a second electronic computation device to generate a new vehicle-to-X message using data included in the received vehicle-to-X message and to calculate a hash value for the generated vehicle-to-X message. The first electronic computation device is designed in accordance with a higher safety integrity level than the second electronic computation device, and a comparison device to make a comparison between the hash value for the received vehicle-to-X message and the hash value for the generated vehicle-to-X message. The vehicle-to-X communication apparatus further processes the data from the received vehicle-to-X message depending on a result of the comparison. Also disclosed are a corresponding method and the use of the apparatus in a vehicle or an infrastructure device.
1. A vehicle-to-X communication apparatus comprising:
a reception device including a receiver or a transceiver, the reception device designed to receive a vehicle-to-X message,
a first electronic computation device designed to calculate a hash value for a received vehicle-to-X message,
a second electronic computation device designed to generate a new vehicle-to-X message using data included in the received vehicle-to-X message and to calculate a hash value for the generated vehicle-to-X message, wherein
the first electronic computation device is designed in accordance with a higher safety integrity level than the second electronic computation device, and
a comparison device designed to make a comparison between the hash value for the received vehicle-to-X message and the hash value for the generated vehicle-to-X message, wherein
the vehicle-to-X communication apparatus is designed to further process the data from the received vehicle-to-X message depending on a result of the comparison.
2. The vehicle-to-X communication apparatus according to claim 1 , designed to further process the data if a result of the comparison indicates a match between the hash value for the received vehicle-to-X message and the hash value for the generated vehicle-to-X message.
3. The vehicle-to-X communication apparatus according to claim 1 , wherein the first electronic computation device is designed in accordance with an ASIL B, C or D safety integrity level.
4. The vehicle-to-X communication apparatus according to claim 1 , wherein the second electronic computation device is designed in accordance with an ASIL QM safety integrity level.
5. The vehicle-to-X communication apparatus according to claim 1 , wherein the second electronic computation device is designed to carry out a vehicle-to-X communication protocol stack and to process the received vehicle-to-X message by means of the vehicle-to-X communication protocol stack.
6. The vehicle-to-X communication apparatus according to claim 5 , wherein the vehicle-to-X communication protocol stack is designed in accordance with an ASIL QM safety integrity level.
7. The vehicle-to-X communication apparatus according to claim 5 , wherein the second electronic computation device is designed to generate the generated vehicle-to-X message using the data from the received vehicle-to-X message by means of the vehicle-to-X communication protocol stack and/or a further vehicle-to-X communication protocol stack.
8. The vehicle-to-X communication apparatus according to claim 1 , wherein the first electronic computation device is designed to store the hash value for the received vehicle-to-X in a data memory.
9. The vehicle-to-X communication apparatus according to claim 1 , wherein the second electronic computation device is designed to store the data from the received vehicle-to-X message in a further data memory.
10. The vehicle-to-X communication apparatus according to claim 9 , wherein the second electronic computation device is designed to store the data from the received vehicle-to-X message in a further data memory only if the result of the comparison indicates a match between the hash value for the received vehicle-to-X message and the hash value for the generated vehicle-to-X message.
11. The vehicle-to-X communication apparatus according to claim 9 , wherein the further data memory is designed as a database for managing data of the vehicle-to-X communication apparatus.
12. The vehicle-to-X communication apparatus according to claim 1 , wherein the vehicle-to-X communication apparatus is designed to make the comparison between the hash value for the received vehicle-to-X message and the hash value for the generated vehicle-to-X message by means of the first electronic computation device and/or the second electronic computation device.
13. The vehicle-to-X communication apparatus according to claim 1 , wherein the second electronic computation device is designed to transmit the hash value for the generated vehicle-to-X message to the first electronic computation device in order to make the comparison.
14. The vehicle-to-X communication apparatus according to claim 1 , wherein the first electronic computation device is designed to transmit the result of the comparison to the second electronic computation device.
15. The vehicle-to-X communication apparatus according to claim 1 , wherein the first electronic computation device is designed to determine an identifier for describing a storage location for the hash value on the basis of the received vehicle-to-X message.
16. A vehicle or an infrastructure device comprising the vehicle-to-X communication apparatus according to claim 1 .
17. A method for achieving a safety integrity level in vehicle-to-X communication, comprising:
receiving a vehicle-to-X message by a reception device,
calculating a hash value for the received vehicle-to-X message by first electronic computation device,
generating a new vehicle-to-X message using data included in the received vehicle-to-X message, by a second electronic computation device, wherein the first electronic computation device is designed in accordance with a higher safety integrity level than the second electronic computation device,
calculating a hash value for the generated vehicle-to-X message by the second electronic computation device,
making a comparison between the hash value for the received vehicle-to-X message and the hash value for the generated vehicle-to-X message by a comparison device, and
using the data from the received vehicle-to-X message for further processing, depending on a result of the comparison.
18. The vehicle-to-X communication apparatus according to claim 2 , wherein the first electronic computation device is designed in accordance with an ASIL B, C or D safety integrity level.
19. The vehicle-to-X communication apparatus according to claim 6 , wherein the second electronic computation device is designed to generate the generated vehicle-to-X message using the data from the received vehicle-to-X message by means of the vehicle-to-X communication protocol stack and/or a further vehicle-to-X communication protocol stack.
20. The vehicle-to-X communication apparatus according to claim 10 , wherein the further data memory is designed as a database for managing data of the vehicle-to-X communication apparatus.