An Analysis on the Minimum Communication Distance for Safe Connected Brakes in Rural LOS Scenarios under IEEE 802.11p

The impact of brake safety is particularly serious in Intelligent vehicles, and braking performance can be improved by introducing Vehicle to Vehicle (V2V) communications. This paper proposes a methodology for an optimisation analysis on vehicle transmitter power and channel delay following the IEEE 802.11p standard to determine the minimum required V2V communications distance for maintaining a safe connected brake in a rural Line-of-sight driving scenario. We have built up a methodology on simulating the maximum delay from Packet Error Rates to analyse under the worst situation. After being optimised for different vehicle initial speeds, the minimum required transmitter power for a smooth and safe brake action is determined.