RSSI based V2X communication plausability check

1. A method for plausibility check in a vehicle-to-everything (V2X) dynamic environment in which a local vehicle communicates with remote vehicles, comprising:

a) obtaining a measured Received Signal Strength Indicator (RSSI) from a specific remote vehicle;

b) calculating an expected RSSI for the specific remote vehicle using a dynamic RSSI model;

c) performing a respective plausibility check for each of the specific remote vehicle and the local vehicle using the specific remote vehicle measured RSSI and the calculated expected RSSI, and, based on results of the respective plausibility checks;

d) deciding on respective further actions to be performed by the specific remote vehicle and by the local vehicle.

2. The method of claim 1 , wherein the local vehicle has a frame with a plurality of sectors adjusted thereto, wherein a specific sector of the plurality of sectors is associated with the specific remote vehicle, and wherein (a)-(d) are performed per the specific sector.

3. The method of claim 1 , wherein the calculating an expected RSSI for the specific remote vehicle using a dynamic RSSI model includes calculating using a RSSI model dynamically adjusted for each measured RSSI per distance of the specific remote vehicle from the local vehicle.

4. The method of claim 1 , wherein the performing a plausibility check includes performing the check using convergence of the RSSI model and an input from a database of plausibilities of received remote vehicles.

5. The method of claim 1 , wherein the deciding on respective further actions includes deciding to reduce the plausibility of the local vehicle if a result of the plausibility check indicates that the specific remote vehicle is implausible.

6. The method of claim 1 , wherein the deciding on respective further actions includes deciding to stop transmission by the local vehicle if a result of the plausibility check indicates that the local vehicle is implausible.

7. The method of claim 1 , wherein the deciding on respective further actions includes deciding to continue transmission by the local vehicle if a result of the plausibility check indicates that the local vehicle is plausible.

8. The method of claim 1 , further comprising: if the plausibility check for the specific remote vehicle indicates that the specific remote vehicle is plausible,

e) updating the dynamic RSSI model.

9. The method of claim 8 , wherein the local vehicle has a frame with a plurality of sectors adjusted thereto, wherein a specific sector of the plurality of sectors is associated with the specific remote vehicle, and wherein (a)-(e) are performed per the specific sector.

10. The method of claim 8 , wherein the calculating an expected RSSI for the specific remote vehicle using a dynamic RSSI model includes calculating using a RSSI model dynamically adjusted for each measured RSSI per distance of the specific remote vehicle from the local vehicle.

11. The method of claim 10 , wherein the calculating using a RSSI model dynamically adjusted for each measured RSSI per distance includes calculating by applying a 2 nd order model for propagation that considers both a linear change coefficient of attenuation relative to a logarithm of the distance and a change in the linear change coefficient of attenuation relative to the same logarithm of distance.

12. A system for plausibility check in a vehicle-to-everything (V2X) dynamic environment in which a local vehicle communicates with remote vehicles, comprising:

a) means for obtaining a measured Received Signal Strength Indicator (RSSI) from a specific remote vehicle; and

b) a modified plausibility check unit configurable and operable to apply a dynamic RSSI model to detect implausible positioning of the specific remote vehicle and/or of the local vehicle based on the measured RSSI of the specific remote vehicle and on a RSSI calculated for the specific remote vehicle.

13. The system of claim 12 , wherein the modified plausibility check unit comprises a RSSI misbehavior detection unit that includes a RSSI model estimation module for estimating and for updating the dynamic RSSI model.

14. The system of claim 12 , wherein the modified plausibility check unit comprises a vehicle database management module for managing a database of vehicle plausibilities used in plausibility checks.

15. The system of claim 12 , wherein the modified plausibility check unit comprises a misbehavior enforcement unit for responding to detected misbehavior by deciding on respective further actions to be performed by the specific remote vehicle and by the local vehicle.

16. The system of claim 13 , wherein the modified plausibility check unit further comprises a vehicle database management module for managing a database of vehicle plausibilities used in plausibility checks.

17. The system of claim 13 , wherein the modified plausibility check unit further comprises a misbehavior enforcement unit for responding to detected misbehavior by deciding on respective further actions to be performed by the specific remote vehicle and by the local vehicle.

18. The system of claim 14 , wherein the modified plausibility check unit further comprises a misbehavior enforcement unit for responding to detected misbehavior by deciding on respective further actions to be performed by the specific remote vehicle and by the local vehicle.

19. The system of claim 12 , wherein the local vehicle has a frame with a plurality of sectors adjusted thereto, wherein a specific sector of the plurality of sectors is associated with the specific remote vehicle, and wherein the a modified plausibility check unit is configurable and operable to apply the dynamic RSSI model for the specific sector.

20. The system of claim 13 , wherein the local vehicle has a frame with a plurality of sectors adjusted thereto, wherein a specific sector of the plurality of sectors is associated with the specific remote vehicle, and wherein the a modified plausibility check unit is configurable and operable to apply the dynamic RSSI model for the specific sector.