An Efficient Data Dissemination Technique in Vehicular Ad Hoc Networks

Abstract

Vehicular Adhoc Networks (VANETs) and smart cities is an emerging area of research. Therefore, the applications based on VANET are increasing day by day. There are a number of applications that can utilize the VANETs architecture to bene t the end-users. However, there are challenges that are coupled with VANETs. One of them is data dissemination in ad hoc vehicu- lar networks. Typically, clustering algorithms are used for data dissemination among the nodes in the cluster of VANETs particularly moving in the same direction. In this approach, the cluster member (CM) upon receiving any packet forwards it to its respective cluster head (CH) which can only dis- seminate the data to other members. Such schemes can add additional delay and failed to perform in emergency situations. In this thesis, our objective is to propose an e cient data dissemination mechanism while controlling the amount of messages to the least. Our proposed solution is based on the supernode concept, in case of emer- gency, any node can elevate its role to disseminate the data event to other vehicles for their timely action. Moreover, to avoid unnecessary rebroadcast which can cause broadcast storm problem, the Time-barrier approach is used to handle this problem. Therefore, only the furthest vehicle rebroadcasts the message and thus message propagate very quickly. The proposed scheme and traditional cluster based scheme will be implemented using OMNeT++, SUMO, and VEINS.