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1. (WO2018161157) PEDESTRIAN SAFETY COMMUNITCATION SYSTEM AND METHOD
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CLAIMS

1 . A method at a power-limited computing station for communicating in an intelligent transport system, the method comprising:

operating the computing station in one of a non-critical radio operating state and a safety-critical radio operating state;

receiving a trigger at the computing station;

determining whether the trigger should cause the computing station to transition a radio operating state; and

if the trigger should cause the computing station to transition the radio operating state, changing the radio operating state to the other of the non-critical radio operating state and the safety-critical radio operating state.

2. The method of claim 1 , wherein the non-critical radio operating state consumes less power resources but has a higher response latency than the safety-critical radio operating state.

3. The method of claim 1 , wherein the trigger includes a wake-up radio signal received at the computing station.

4. The method of claim 1 , wherein the trigger includes a Bluetooth Low Energy signal received at the computing station.

5. The method of claim 1 , wherein the trigger is relayed from a vehicle or other computing station in the intelligent transport system using an infrastructure element.

6. The method of claim 1 , wherein the trigger includes one or more messages of the type of a Cooperative Awareness Message, a Personal Safety Message, or a Basic Safety message.

7. The method of claim 1 , wherein the changing to the safety-critical radio operating state causes a second radio to be activated on the computing station.

8. The method of claim 7, wherein the second radio is a safety radio for intelligent transportation systems.

9. The method of claim 1 , wherein the changing to the non-critical radio operating state causes a radio on the computing station to use discontinuous reception.

10. The method of claim 1 , wherein the determining uses information from local sensors on the computing station in conjunction with the trigger.

1 1 . The method of claim 1 , wherein the trigger is a message from a cellular base station providing an indication that the computing station is entering or leaving a geofenced area.

12. The method of claim 1 , wherein the determining ignores the trigger when the computing station is within a vehicle.

13. The method of claim 1 , wherein the determining ignores the trigger when the computing station is in a different plane from a transmitter that sent the trigger.

14. The method of claim 1 , wherein the determining differs based on time of day.

15. A power-limited computing station for communicating in an intelligent transport system, the computing station comprising:

a processor; and

a communications subsystem,

wherein the computing station is configured to:

operate in one of a non-critical radio operating state and a safety-critical radio operating state;

receive a trigger at the computing station;

determine whether the trigger should cause the computing station to transition a radio operating state; and

if the trigger should cause the computing station to transition the radio operating state, change the radio operating state to the other of the non-critical radio operating state and the safety-critical radio operating state.

16. The computing station of claim 15, wherein the non-critical radio operating state consumes less power resources but has a higher response latency than the safety-critical radio operating state.

17. The computing station of claim 15, wherein the trigger includes a wake-up radio signal received at the computing station.

18. The computing station of claim 15, wherein the trigger includes a Bluetooth Low Energy signal received at the computing station.

19. The computing station of claim 15, wherein the trigger is relayed from a vehicle or other computing station in the intelligent transport system using an infrastructure element.

20. The computing station of claim 15, wherein the trigger includes one or more messages of the type of a Cooperative Awareness Message, a Personal Safety Message, or a Basic Safety message.

21 . The computing station of claim 15, wherein the computing station is configured to change to the safety-critical radio operating state by causing a second radio to be activated on the computing station.

22. The computing station of claim 21 , wherein the second radio is a safety radio for intelligent transportation systems.

23. The computing station of claim 15, wherein the computing station is configured to change to the non-critical radio operating state by causing a radio on the computing station to use discontinuous reception.

24. The computing station of claim 15, wherein the computing station is configured to determine using information from local sensors on the computing station in conjunction with the trigger.

25. The computing station of claim 15, wherein the trigger is a message from a cellular base station providing an indication that the computing station is entering or leaving a geofenced area.

26. The computing station of claim 1 , wherein the computing station is configured to determine by ignoring the trigger when the computing station is within a vehicle.

27. The computing station of claim 15, wherein the computing station is configured to determine by ignoring the trigger when the computing station is in a different plane from a transmitter that sent the trigger.

28. The computing station of claim 15, wherein the computing station is configured to determine based on time of day.

29. A computer readable medium containing instruction code, which, when executed by a processor of computing station, allow for communication in an intelligent transport system, the instruction code causing the computing station to:

operate in one of a non-critical radio operating state and a safety-critical radio operating state;

receive a trigger at the computing station;

determine whether the trigger should cause the computing station to transition a radio operating state; and

if the trigger should cause the computing station to transition the radio operating state, change the radio operating state to the other of the non-critical radio operating state and the safety-critical radio operating state.