Design and Implementation of the Vehicle Rear-End Collision Avoidance Terminal System Based on IEEE 802.11 p/1609

Rear-end collision is one of the main types of traffic collisions on the road.Therefore,rear-end collision avoidance technology has attracted extensive attention of numerous researchers around the world.This paper proposes a rear-end collision avoidance system based on the IEEE 802.1 1 p/1 609 protocols.The system consists of a Freescale hard-ware platform and a software platform based on an embedded Linux OS.Real-time location information of each vehicle is obtained by Global Positioning System (GPS).A wireless access in vehicular environments (WAVE)is used to provide a high-speed and two-way interactive communication between vehicles for real-time rear-end collision warnings.The per-formance of the system is tested.Test results show that the proposed system can provide high efficient and reliable com-munications between vehicles.The packet loss rate is less than 10% with Binary Phase Shift Keying (BPSK)under either static or dynamic vehicle operating state.And the results show that the system developed can effectively capture the dif-ferent driving behaviors and provide warnings in a real time with a high accuracy of 97%.The study results indicate that the proposed system is effective for field implementation.