Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.22/5401
Título: Performance evaluation of a cooperative reputation system for vehicular delay-tolerant networks
Autor: Dias, João A.F.F.
Rodrigues, Joel
Shu, Lei
Ullah, Sana
Palavras-chave: Vehicular delay-tolerant networks
Reputation system
Selfish nodes
Performance evaluation
Data: 2014
Editora: SpringerOpen
Relatório da Série N.º: EURASIP Journal on Wireless Communications and Networking;Vol. 2014
Resumo: In the last decade, both scientific community and automotive industry enabled communications among vehicles in different kinds of scenarios proposing different vehicular architectures. Vehicular delay-tolerant networks (VDTNs) were proposed as a solution to overcome some of the issues found in other vehicular architectures, namely, in dispersed regions and emergency scenarios. Most of these issues arise from the unique characteristics of vehicular networks. Contrary to delay-tolerant networks (DTNs), VDTNs place the bundle layer under the network layer in order to simplify the layered architecture and enable communications in sparse regions characterized by long propagation delays, high error rates, and short contact durations. However, such characteristics turn contacts very important in order to exchange as much information as possible between nodes at every contact opportunity. One way to accomplish this goal is to enforce cooperation between network nodes. To promote cooperation among nodes, it is important that nodes share their own resources to deliver messages from others. This can be a very difficult task, if selfish nodes affect the performance of cooperative nodes. This paper studies the performance of a cooperative reputation system that detects, identify, and avoid communications with selfish nodes. Two scenarios were considered across all the experiments enforcing three different routing protocols (First Contact, Spray and Wait, and GeoSpray). For both scenarios, it was shown that reputation mechanisms that punish aggressively selfish nodes contribute to increase the overall network performance.
Peer review: yes
URI: http://hdl.handle.net/10400.22/5401
DOI: 10.1186/1687-1499-2014-88
Versão do Editor: http://jwcn.eurasipjournals.com/content/2014/1/88
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