Examining Four Ad Hoc Routing Protocols for a Road Traffic Monitoring System

摘要

This paper studies and evaluates the performance of 4 Ad hoc routing protocols to carry the information of a road traffic monitoring system. The suggested information gathering and monitoring system is designed for vehicular ad-hoc networks (VANETs), that is implemented in a large. The suggested infrastructure consists of low cost wireless sensors covering certain areas and connected to “the monitoring and control center” through a master node. The operation of the suggested system is divided into four main phases: the first phase deals with the information gathering process in the vehicles and sensors level, the second phase deals with the information transmission from the sensors to the master node, the third phase (the subject of this paper), focuses on the information transportation between the master nodes until it reaches “the monitoring and control center” which monitors the road traffic of a large geographical area. Finally the fourth phase deals with the dissemination of the gathered information to the vehicles. The mechanisms of the information transportation in the third phase are proposed to be in an ad-hoc manner, so we study the performance of the disseminated master nodes along a city map using four ad-hoc protocols: Ad-hoc On Demand Distance Vector Routing Protocol “AODV”, Dynamic Source routing “DSR”, Optimized Link State Routing Protocol “OLSR” and the Temporally-Ordered Routing Algorithm Protocol “TORA”, then choosing the best one according to many metrics such as data delivery, latency and average throughput on the radio channel.