Fault-Tolerance Evaluation of VANET Under Different Data Dissemination Models

Mobile Ad hoc Networks (MANETs) is a collection of wireless mobile nodes, which form temporary networks over infrastructure-less environments. Over the last few years, Vehicular Ad hoc Network (VANET) technology has been considered as an active research area. VANET is a sub class of MANET with some unique characteristics such as fast vehicle speed, frequent topology changes and restricted mobility on roads. The communication between vehicles provides a new avenue for different types of applications such as safety, traffic management, entertainment, etc. These applications are categorized based on how data is transmitted from source to destination. The performance of such applications does not only depend on routing protocols, but also on the data dissemination mechanism. Data dissemination in VANETs is a significant factor, which can be accomplished using four different models: Dynamic Source Dynamic Destination (DSDD), Dynamic Source Static Destination (DSSD), Static Source Dynamic Destination (SSDD), and Static Source Static Destination (SSSD). Each one of these models is suitable for specific types of applications. In this paper, the authors study and evaluate the fault-tolerance of VANET under different data dissemination techniques in terms of throughput, average End-to-End delay, and percentage of packet loss. the authors used NCTUns 6.0 network simulator and IEEE 802.11p wireless communication standard. Their findings show that DSDV is more fault-tolerant than both DSR and AODV in terms of packet loss percentage for all dissemination techniques. However, AODV shows better performance in average End-to-End delay and throughput under DSDD and SSDD techniques.