INDEXING CELLULAR V2X COVERAGE RANGE TO VEHICLE SPEED

• US 20180132193A1
• Filed: 03/07/2017
• Published: 05/10/2018
• Est. Priority Date: 11/09/2016
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: MISENER, James Alan, ELLIS, Jason
• Granted Patent: US 10,609,654 B2
• Time in Patent Office: Days
• CPC Class Codes: H04W 4/40 for vehicles, e.g. vehicle-to-pedestrians [V2P]
• CPC Class Codes: H04W 4/44 for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]
• CPC Class Codes: H04W 4/46 for vehicle-to-vehicle communication [V2V]
• CPC Class Codes: H04W 52/281 taking into account user or data type priority
• CPC Class Codes: H04W 52/282 taking into account the speed of the mobile
• CPC Class Codes: H04W 52/383 power control in peer-to-peer links

Abstract

In vehicle-to-vehicle (V2V) or vehicle-to-everything (V2X) communication, the vehicle may wirelessly transmit a signal. However, transmission of a signal using a fixed transmit power may not be desirable. The transmit power should be adjusted based on various factors such as a vehicle speed and a priority level of the vehicle. The apparatus may be a device capable of wireless communication, and may be in a vehicle. The device determines one or more parameters associated with a vehicle including the device, the parameter including at least one of a speed of the vehicle or a priority level of the vehicle. The device sets a transmit power of the device based on the one or more parameters. The device transmits a message via wireless communication using the set transmit power.

Claims

1. A method of managing transmit power for wireless communication by a device, comprising:

determining one or more parameters associated with a host vehicle including the device, the one or more parameters including at least one of a speed of the host vehicle or a priority level of the host vehicle;

setting a transmit power of the device based on the one or more parameters, wherein setting the transmit power comprises determining to refrain from increasing the transmit power beyond a nominal power when a channel used to transmit a message is at a busy level; and

transmitting the message via wireless communication using the set transmit power.

2. The method of claim 1, wherein increasing the transmit power increases a communication range of the device and decreasing the transmit power decreases the communication range of the device.

3. The method of claim 1, wherein the setting the transmit power comprises:

increasing the transmit power if the speed of the host vehicle increases; and

decreasing the transmit power if the speed of the host vehicle decreases.

4. The method of claim 1, wherein the setting the transmit power comprises:

increasing the transmit power if the speed of the host vehicle is above a nominal speed; and

decreasing the transmit power if the speed of the host vehicle is below the nominal speed.

5. The method of claim 4, wherein the nominal speed is based on a speed limit associated with the host vehicle for a certain region of a road where the vehicle is present.

6. The method of claim 1, wherein the setting the transmit power further comprises:

refraining from increasing the transmit power to a power greater than the nominal power when the channel used to transmit the message is at a busy level.

7. The method of claim 1, wherein the setting the transmit power further comprises:

determining whether an overriding factor exists;

increasing the transmit power when the channel used to transmit the message is at a busy level and if the overriding factor exists; and

refraining from increasing the transmit power to a power greater than the nominal power if the channel used to transmit the message is at the busy level and if the overriding factor does not exist.

8. The method of claim 7, wherein the one or more parameters include a priority level of the host vehicle, and wherein the overriding factor exists when the priority level is at or above a threshold level.

9. The method of claim 1, wherein the setting the transmit power comprises:

setting the transmit power to a high power if the priority level is at or above a threshold level; and

setting the transmit power to the nominal power if the priority level is below the threshold level.

10. The method of claim 9, wherein the determining the one or more parameters further comprises:

determining the priority level of the host vehicle based on at least one of a type of the host vehicle, a mission of the host vehicle, or a threat level of the host vehicle to at least one of another vehicle or a person.

11. The method of claim 10, wherein the priority level of the host vehicle is determined to be above the threshold level if at least one of a first condition, a second condition, or a third condition is satisfied, and

wherein the first condition is that the type of the host vehicle is a high priority vehicle type, the second condition is that the mission of the host vehicle is a high priority mission, and the third condition is that the threat level of the host vehicle is a high threat level.

12. The method of claim 11, wherein the high priority vehicle type includes at least one of an emergency vehicle, a police vehicle, or a public transportation vehicle.

13. The method of claim 11, wherein the priority level of the host vehicle is determined to be above the threshold level when at least the third condition is satisfied, and wherein the threat level is the high threat level when at least one of a first threat condition or a second threat condition is satisfied, wherein the first threat condition is that the host vehicle is traveling in an opposite direction to a direction of a travel lane and the second threat condition is that the host vehicle is determined to be a stolen vehicle.

14. The method of claim 1, wherein the wireless communication is at least one of device-to-device communication or vehicle-to-vehicle communication.

15. The method of claim 1, wherein the speed of the host vehicle is determined based on an acceleration of the host vehicle.

16. The method of claim 15, wherein the setting the transmit power is further based on a first threshold speed if the speed of the host vehicle increases based on the acceleration to be greater than or equal to the first threshold speed and less than a second threshold speed, the second threshold speed being greater than the first threshold speed.

17. The method of claim 16, wherein the setting the transmit power is further based on the second threshold speed if the speed of the host vehicle increases based on the acceleration to be greater than or equal to the second threshold speed within a predetermined time, and

wherein the setting the transmit power is further based on the first threshold speed if the speed of the host vehicle has not reached the second threshold speed within the predetermined time.

18. A device for managing transmit power for wireless communication, comprising:

a memory; and

at least one processor coupled to the memory and configured to;

determine one or more parameters associated with a host vehicle including the device, the one or more parameters including at least one of a speed of the host vehicle or a priority level of the host vehicle;

set a transmit power of the device based on the one or more parameters, wherein setting the transmit power comprises determining to refrain from increasing the transmit power beyond a nominal power when a channel used to transmit a message is at a busy level; and

transmit the message via wireless communication using the set transmit power.

19. The device of claim 18, wherein the at least one processor configured to set the transmit power is configured to:

increase the transmit power if the speed of the host vehicle increases; and

decrease the transmit power if the speed of the host vehicle decreases.

20. The device of claim 18, wherein the at least one processor configured to set the transmit power is configured to:

increase the transmit power if the speed of the host vehicle is above a nominal speed; and

decrease the transmit power if the speed of the host vehicle is below the nominal speed.

21. The device of claim 18, wherein the at least one processor configured to set the transmit power is further configured to:

refrain from increasing the transmit power to a power greater than the nominal power if when the channel used to transmit a message is at a busy level.

22. The device of claim 18, wherein the at least one processor configured to set the transmit power is configured to:

determine whether an overriding factor exists;

increase the transmit power when the channel used to transmit a message is at a busy level and if the overriding factor exists; and

refrain from increasing the transmit power to a power greater than the nominal power if the channel used to transmit the message is at the busy level and if the overriding factor does not exist.

23. The device of claim 22, wherein the one or more parameters include a priority level of the host vehicle, and wherein the overriding factor exists when the priority level is at or above a threshold level.

24. The device of claim 18, wherein the at least one processor configured to set the transmit power is configured to:

set the transmit power to a high power if the priority level is at or above a threshold level; and

set the transmit power to the nominal power if the priority level is below the threshold level.

25. The device of claim 24, wherein the at least one processor configured to determine the one or more parameters is further configured to:

determine the priority level of the host vehicle based on at least one of a type of the host vehicle, a mission of the host vehicle, or a threat level of the host vehicle to at least one of another vehicle or a person.

26. The device of claim 18, wherein the speed of the host vehicle is determined based on an acceleration of the host vehicle.

27. A device for managing transmit power for wireless communication, comprising:

means for determining one or more parameters associated with a host vehicle including the device, the one or more parameters including at least one of a speed of the host vehicle or a priority level of the host vehicle;

means for setting a transmit power of the device based on the one or more parameters, wherein setting the transmit power comprises determining to refrain from increasing the transmit power beyond a nominal power when a channel used to transmit a message is at a busy level; and

means for transmitting the message via wireless communication using the set transmit power.

28. The device of claim 27, wherein increasing the transmit power increases a communication range of the device and decreasing the transmit power decreases the communication range of the device.

29. The device of claim 27, wherein the means for setting the transmit power is configured to:

increase the transmit power if the speed of the host vehicle increases; and

decrease the transmit power if the speed of the host vehicle decreases.

30. A non-transitory computer-readable medium storing computer executable code for a device, comprising code to:

determine one or more parameters associated with a host vehicle including the device, the one or more parameters including at least one of a speed of the host vehicle or a priority level of the host vehicle;

set a transmit power of the device based on the one or more parameters, wherein setting the transmit power comprises determining to refrain from increasing the transmit power beyond a nominal power when a channel used to transmit a message is at a busy level; and

transmit the message via wireless communication using the set transmit power.