Safety event message transmission timing in dedicated short-range communication (DSRC)

Patent metadata

Field	Value
Publication number	US-10553112-B2
Application number	US-201615233637-A
Country	US
Kind code	B2
Filing date	Aug 10, 2016
Priority date	Aug 19, 2015
Publication date	Feb 4, 2020
Grant date	Feb 4, 2020

Abstract

Techniques for transmitting vehicle information messages among a plurality of vehicles are disclosed. In an aspect, a transceiver of a vehicle transmits a first set of vehicle information messages over a wireless medium at a first periodic rate, the first set of vehicle information messages including information related to the vehicle. One or more sensors of the vehicle detect an event related to operation of the vehicle. A processor of the vehicle generates a second set of vehicle information messages each including an event flag and information about the event, the event flag indicating that the second set of vehicle information messages is reporting the event. The transceiver of the vehicle transmits a first vehicle safety message of the second set of vehicle information messages over the wireless medium as soon as the first vehicle safety message is generated.

First claim

What is claimed is:

1. A method for transmitting vehicle information messages among a plurality of vehicles, comprising:
transmitting, by a transceiver of a vehicle of the plurality of vehicles, a first set of vehicle information messages over a vehicle communication channel on a wireless medium at a first periodic rate, the first set of vehicle information messages including information related to the vehicle;
detecting, by one or more sensors of the vehicle, an event related to operation of the vehicle;
generating, by at least one processor of the vehicle, a second set of vehicle information messages each including an event flag and information about the event, the event flag indicating that the second set of vehicle information messages is reporting the event;
transmitting, by the transceiver of the vehicle, a first vehicle information message of the second set of vehicle information messages over the vehicle communication channel on the wireless medium either (1) as soon as the wireless medium is available and without waiting for a next transmission opportunity of the first periodic rate or (2) immediately without waiting for the wireless medium to be available; and
transmitting, by the transceiver of the vehicle, a remainder of the second set of vehicle information messages over the vehicle communication channel on the wireless medium.

2. The method of claim 1 , wherein the transceiver of the vehicle transmits the remainder of the second set of vehicle information messages over the vehicle communication channel on the wireless medium at the first periodic rate.

3. The method of claim 1 , wherein the transceiver of the vehicle transmits the remainder of the second set of vehicle information messages over the vehicle communication channel on the wireless medium at a higher frequency than the first periodic rate.

4. The method of claim 1 , wherein the second set of vehicle information messages each include the same information about the event.

5. The method of claim 1 , further comprising:
repeating transmission of the second set of vehicle information messages up to a threshold number of times to ensure that nearby vehicles receive the second set of vehicle information messages.

6. The method of claim 5 , further comprising:
updating vehicle state information in the second set of vehicle information messages based on a change in state of the vehicle.

7. The method of claim 1 , wherein a vehicle information message comprises a Basic Safety Messages (BSM) or a Cooperative Awareness Message (CAM).

8. The method of claim 1 , wherein the information related to the vehicle includes a position of the vehicle, an elevation of the vehicle, a position accuracy of the position of the vehicle, a speed of the vehicle, a transmission state of the vehicle, a heading state of the vehicle, a steering wheel angle of the vehicle, an acceleration of the vehicle, a brake system status of the vehicle, a size of the vehicle, or any combination thereof.

9. The method of claim 1 , wherein the information about the event includes a path history of the vehicle, a path prediction of the vehicle, or any combination thereof.

10. The method of claim 1 , wherein the event related to the operation of the vehicle includes a hard braking event, a failure to brake event, an unsignaled lane change event, a failure to follow a traffic signal event, an excessive speed event, or any combination thereof.

11. The method of claim 1 , wherein the first and second sets of vehicle information messages are utilized by nearby ones of the plurality of vehicles for automated vehicle control for emergency intervention, vehicle-to-vehicle (V2V) and/or vehicle-to-infrastructure (V2I) communication for coordination with other vehicles in close-following automated vehicle operation, or any combination thereof.

12. The method of claim 1 , wherein the first periodic rate comprises a periodic rate of 100 ms.

13. The method of claim 1 , wherein other vehicles of the plurality of vehicles transmit vehicle information messages on the wireless medium at the first periodic rate.

14. The method of claim 13 , wherein a gap between vehicle information messages transmitted by the plurality of vehicles corresponds to a highest priority access class specified by Enhanced Distributed Channel Access (EDCA) parameters.

15. The method of claim 1 , wherein the plurality of vehicles both transmit and receive vehicle information messages over the vehicle communication channel on the wireless medium.

16. The method of claim 1 , wherein the wireless medium comprises a Dedicated Short-Range Communication (DSRC) wireless communication link in a licensed Intelligent Transportation Systems (ITS) band of 5.9 GHz.

17. An apparatus for transmitting vehicle information messages among a plurality of vehicles, comprising:
a transceiver of a vehicle of the plurality of vehicles configured to transmit a first set of vehicle information messages over a vehicle communication channel on a wireless medium at a first periodic rate, the first set of vehicle information messages including information related to the vehicle;
one or more sensors of the vehicle configured to detect an event related to operation of the vehicle; and
at least one processor of the vehicle configured to generate a second set of vehicle information messages each including an event flag and information about the event, the event flag indicating that the second set of vehicle information messages is reporting the event,
wherein the transceiver of the vehicle is further configured to:
transmit a first vehicle information message of the second set of vehicle information messages over the vehicle communication channel on the wireless medium either (1) as soon as the wireless medium is available and without waiting for a next transmission opportunity of the first periodic rate or (2) immediately without waiting for the wireless medium to be available; and
transmit a remainder of the second set of vehicle information messages over the vehicle communication channel on the wireless medium.

18. The apparatus of claim 17 , wherein the transceiver of the vehicle is configured to transmit the remainder of the second set of vehicle information messages over the vehicle communication channel on the wireless medium at the first periodic rate.

19. The apparatus of claim 17 , wherein the transceiver of the vehicle is configured to transmit the remainder of the second set of vehicle information messages over the vehicle communication channel on the wireless medium at a higher frequency than the first periodic rate.

20. The apparatus of claim 17 , wherein the second set of vehicle information messages each include the same information about the event.

21. The apparatus of claim 17 , wherein the transceiver of the vehicle is further configured to repeat transmission of the second set of vehicle information messages up to a threshold number of times to ensure that nearby vehicles receive the second set of vehicle information messages.

22. The apparatus of claim 21 , wherein the at least one processor is further configured to update vehicle state information in the second set of vehicle information messages based on a change in state of the vehicle.

23. The apparatus of claim 17 , wherein a vehicle information message comprises a Basic Safety Messages (BSM) or a Cooperative Awareness Message (CAM).

24. The apparatus of claim 17 , wherein the information related to the veh

Assignees

• Qualcomm Inc

Inventors

• Gogic Aleksandar
• MISENER James Alan

Classifications

• H04W4/46 Primary

  for vehicle-to-vehicle communication [V2V] · CPC title

• G08G1/096791 Primary

  where the origin of the information is another vehicle · CPC title

• H04W4/80 Primary

  Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication · CPC title

• H04L67/12

  specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks · CPC title