Vehicle platooning management and power control with LTE/5G V2X communications

1. A system comprising:

a platoon server in communication with a plurality of vehicles, programmed to:

receive a platoon request from a platoon candidate vehicle, the request including platoon data indicative of size, transmit power, and location of the candidate vehicle,

responsive to receipt of the platoon request, send an add message to a member of the platoon that is platoon beacon requesting the candidate vehicle be added to the platoon,

receive, from the platoon beacon responsive to the add message, an add response acknowledging acceptance by the platoon beacon of addition of the candidate vehicle to the platoon,

send a join message to the candidate vehicle to admit the candidate vehicle to the platoon responsive to receipt of the add response,

admit the candidate vehicle to be a member vehicle of the platoon, and

update which member vehicle of the platoon is the platoon beacon based upon platoon data of each member vehicle of the platoon.

2. The system of claim 1 , wherein the candidate vehicle is programmed to join the platoon responsive to receipt of the join message.

3. The system of claim 1 , wherein communication between the platoon server and the platoon candidate is performed over a Uu interface, and communication between the platoon server and the platoon beacon is performed over a PC5 interface.

4. The system of claim 1 , wherein the platoon server is further programmed to periodically update which vehicle of the platoon is platoon beacon based upon platoon data of each member vehicle of the platoon.

5. The system of claim 1 , wherein the platoon beacon is further programmed to periodically broadcast Cooperative Awareness Messages (CAMs) to each member vehicle of the platoon.

6. The system of claim 1 , wherein the platoon server is further programmed to choose the platoon beacon as being the member vehicle of the platoon having a location closest to a geographic center of the platoon.

7. The system of claim 1 , wherein the platoon server is further programmed to choose the platoon beacon as being the member vehicle of the platoon having a largest vehicle size.

8. A system, comprising:

a platoon server in communication with a plurality of vehicles, programmed to

receive a platoon request from a platoon candidate vehicle, the request including platoon data indicative of size, transmit power, and location of the candidate vehicle,

admit the candidate vehicle to be a member vehicle of the platoon,

update which member vehicle of the platoon is platoon beacon based upon platoon data of each member vehicle of the platoon, and

indicate a vehicle of the platoon as being the platoon beacon by sending, to the vehicle, a configuration message specifying configuration information for V2X sidelink communications for the platoon, the configuration message including a flag specifying the vehicle as being selected to be platoon beacon.

9. The system of claim 8 , wherein the configuration message is a SL-V2X-ConfigDedicated information element.

10. A method for a vehicle comprising:

sending, to a platoon server managing a platoon, a platoon request including platoon data specifying size, transmit power, and location of the vehicle, the platoon server sending an add message to a member of the platoon that is platoon beacon requesting the candidate vehicle be added to the platoon, receiving, from the platoon beacon responsive to the add message, an add response acknowledging acceptance by the platoon beacon of addition of the candidate vehicle to the platoon, and sending a join message specifying a platoon beacon of the platoon;

receiving the join message from the server, the platoon beacon being recalculated by the server responsive to the platoon request; and

responsive to receiving the join message, sending a message to the platoon beacon requesting admission to the platoon.

11. The method of claim 10 , further comprising receiving, from the platoon beacon, periodically broadcast Cooperative Awareness Messages (CAMs).

12. The method of claim 10 , further comprising:

receiving, from the platoon server, a message indicating that the vehicle is now the platoon beacon; and

sending, from the vehicle designated as platoon beacon, periodic broadcast Cooperative Awareness Messages (CAMs).

13. The method of claim 10 , further comprising:

receiving, from a base station serving the vehicle, a message indicating that the vehicle is the platoon beacon as identified by the base station; and

sending, from the vehicle designated as platoon beacon, periodic broadcast Cooperative Awareness Messages (CAMs).

14. The method of claim 10 , further comprising choosing the platoon beacon as one or more of being a member vehicle of the platoon having a location closest to a geographic center of the platoon or being a member vehicle of the platoon having a largest vehicle size.

15. A non-transitory computer-readable medium comprising instructions that, when executed by a platoon server, cause the platoon server to:

receive a platoon request from a platoon candidate vehicle, the request including platoon data indicative of size, transmit power, and location of the candidate vehicle;

responsive to receipt of the platoon request, send an add message to a member of the platoon that is platoon beacon requesting the candidate vehicle be added to the platoon;

receive, from the platoon beacon responsive to the add message, an add response acknowledging acceptance by the platoon beacon of addition of the candidate vehicle to the platoon;

send a join message to the candidate vehicle to admit the candidate vehicle to the platoon responsive to receipt of the add response;

admit the candidate vehicle to be a member vehicle of the platoon; and

update which member vehicle of the platoon is the platoon beacon based upon platoon data of each member vehicle of the platoon.

16. The medium of claim 15 , wherein communication between the platoon server and the platoon candidate is performed over a Uu interface, and communication between each of the member vehicles and the platoon beacon is performed over a PC5 interface.

17. The medium of claim 15 , further comprising instructions that, when executed by the platoon server, cause the platoon server to periodically update which vehicle of the platoon is platoon beacon based upon platoon data of each member vehicle of the platoon.

18. The medium of claim 15 , further comprising instructions that, when executed by the platoon server, cause the platoon server to one or more of:

choose the platoon beacon as being the member vehicle of the platoon having a location closet to a geographic center of the platoon; or

choose the platoon beacon as being the member vehicle of the platoon having a largest vehicle size.