Abstract
As an emerging technology, Vehicular ad hoc networks (VANETs) aim to increase safety and comfort of driving in highways and urban streets. The conventional measures taken have a positive effect on the decline of casualties and injuries incurred by the accidents. But the number of incidents in the traffic still remains stable. VANETs intend to overcome this problem by providing additional information to the driver, thus allowing him to react faster and better in adverse situations. In order to achieve this, VANETs require efficient routing protocols for message transmission among vehicles. In this paper, we explore the performances of four prominent non-delay tolerant routing protocols, namely GPSR, GPSR+AGF, GSR, and GPSRJ+. Although relatively outdated, these protocols are initial inspiration to many routing methods and commonly used as comparison benchmark when a new routing protocol is to be introduced. The evaluation metrics that are used are Packet Delivery Ratio, Average Delay, Traffic Control Overhead, and Average Hop Count.
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