Performance of Vehicle-to-Vehicle Communication using IEEE 802.11p in Vehicular Ad-hoc Network Environment

TL;DR

This paper evaluates the performance of IEEE 802.11p for V2V communication in vehicular networks, highlighting its limitations and proposing STDMA as a promising alternative for real-time data exchange.

Contribution

It introduces the use of STDMA for V2V communication to improve real-time data transmission over IEEE 802.11p, supported by simulation results.

Findings

IEEE 802.11p's CSMA does not guarantee timely access, causing packet drops.

STDMA shows promising real-time performance in highway scenarios.

Packet drop rates are significantly reduced with STDMA.

Abstract

Traffic safety applications using vehicle-to-vehicle (V2V) communication is an emerging and promising area within the ITS environment. Many of these applications require real-time communication with high reliability. To meet a real-time deadline, timely and predictable access to the channel is paramount. The medium access method used in 802.11p, CSMA with collision avoidance, does not guarantee channel access before a finite deadline. The well-known property of CSMA is undesirable for critical communications scenarios. The simulation results reveal that a specific vehicle is forced to drop over 80% of its packets because no channel access was possible before the next message was generated. To overcome this problem, we propose to use STDMA for real-time data traffic between vehicles. The real- time properties of STDMA are investigated by means of the highway road simulation scenario, with promising results.