Car-to-Car Communication for Accident Avoidance

Title of presentation goes hereCar-to-Car Communication
Over 42,000 fatalities in the United States every year.
More than 2.9 Million injuries from 6.4 Million car accidents annually.
Combined cost of 230+ Billion dollars per year.
Responsible for 5% of preventable deaths each year (JAMA).
Goal: To provide a system to reduce these rates by warning drivers before a collision happens. How?
Use GPS to track position and vehicle’s OBD-II port to monitor speed and acceleration of vehicles.
Communicate this information among cars on the road via Dedicated Short Range Communication in the 5.9GHz spectrum.
Journal of the american medical association
*
Use of Car to Car Communication
Cars 2 & 3 emit audio warning indicating Car 1 is decelerating rapidly.
*
Use OBD-II (on-board diagnostic connection) to monitor speed, acceleration, and other information from car’s computer
Standard on all cars made after 1996 – includes 150 million+ cars on the road in the U.S. today.
Communicate between vehicles using DSRC (Dedicated Short Range Communication) Transceiver
*
*
*
Refreshes Coordinates
Outputs:
Green LED indicator, red LED warning light, Piezoelectric element for audible warning.
Power adaptor from car
Time-stamp acquired from GPS at same rate.
Heading, or compass direction, calculated from comparing GPS location to previous coordinates.
Speed information from Engine Control Unit polled at approximately 10 Hz.
Acceleration calculated from current and previous velocity values.
Control signal to monitor transceiver buffer; above five data points received from other units at max. frequency possible.
5 things
*
Total processing time is minimized by performing heading and acceleration calculations before transmitting.
Minimal packet size allows frequent transmission of single packet containing all pertinent information.
Data transmitted after each update to prevent stale data. “Dead reckoning” also implemented to fill in the blanks between each GPS update.
Reduce processing req. by network
*
*
Tested at 160 m
~13 bytes
*
Things to come
*