Optimum Backoff in CSMA-CA for Ad-Hoc Vehicles Network in Motorway

Abstract

With current technological developments, wireless networks are becoming popular. VANET is a type of MANET that allows data to be transferred between nearby vehicles. These types of communications can help prevent accidents and investigate post-crash accidents or traffic jams by allowing vehicles to share and broadcast safety information with other vehicles to alert drivers. VANETs offer many possibilities for many new applications. This paper provides an evaluation of mobility influence on the initial backoff contention windows performance. The study evaluates basic performance metrics such as packet delivery ratio, throughput and average end-to-end-delay by using the network simulator (NS-2). They propose four dynamic value initial backoff of contention windows mechanisms to alleviate network performance degradation due to high mobility. The nodes are running in the same direction and at constant speeds in terms of a varying number of initial backoff of contention windows and to determine the influence routing protocol.