期刊名称：International Journal of Electronics Communication and Computer Engineering
印刷版ISSN：2249-071X
电子版ISSN：2278-4209
出版年度：2012
卷号：3
期号：5
页码：1263-1269
出版社：IJECCE
摘要：Vehicular Delay Tolerant Network (DTN) is an extended application of Vehicular Adhoc Network (VANET) where small delay can be tolerated. In vehicular DTN, some selfish node may exist who may not want to forward other’s message in order to save their own resources which results into degraded performance of the overall network. VANET is characterised by high mobility and rapidly changing topology, therefore it poses special challenges and high demands for cooperation among individual vehicles to contribute to the network performance. Practical Incentive Protocol is used as its solution to improve the overall performance of the network which is secure, fair and a hybrid protocol. When fair incentive is provided to selfish node, it is motivated to act as intermediate node in order to earn the incentive and use it further to avail the service. In this paper, effect of noncooperation is analysed in terms of delivery ratio and average delay in vehicular DTN for multicopy routing algorithm, specifically for unicast. The effect of Practical Incentive Protocol is analysed using ONE simulator for different level of selfishness and improvement in terms of delivery ratio and average delay is shown for multicopy routing protocol. Also the comparative analysis of Practical Incentive Protocol is done with latest similar technique i.e. A Secure Multilayer Credit based Incentive scheme for Delay Tolerant Networks (SMART
关键词：Credit and reputation; Incentive; noncooperation; selfish node; Vehicular adhoc network
