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EURASIP Journal on Wireless Communications and Networking

, 2011:195

First Online: 06 December 2011Received: 21 July 2011Accepted: 06 December 2011


Vehicular Delay-Tolerant Networks VDTNs are a new approach for vehicular communications where vehicles cooperate with each other, acting as the communication infrastructure, to provide low-cost asynchronous opportunistic communications. These communication technologies assume variable delays and bandwidth constraints characterized by a non-transmission control protocol-internet protocol architecture but interacting with it at the edge of the network. VDTNs are based on the principle of asynchronous communications, bundle-oriented communication from the DTN architecture, employing a store-carry-and-forward routing paradigm. In this sense, VDTNs should use the tight network resources optimizing each opportunistic contact among nodes. Given the limited contact times among nodes, fragmentation appears as a possible solution to improve the overall network performance, increasing the bundle delivery probability. This article proposes the use of several fragmentation approaches proactive, source, reactive, and toilet paper for VDTNs. They are discussed and evaluated through a laboratory testbed. Reactive and toilet paper approaches present the best results. It was also shown that only the source fragmentation approach presents worst results when compared with non-fragmentation approaches.

Keywordsvehicular delay-tolerant networks vehicular communications fragmentation performance evaluation prototype Electronic supplementary materialThe online version of this article doi:10.1186-1687-1499-2011-195 contains supplementary material, which is available to authorized users.

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Autor: João A. F. F. Dias - Joel J. P. C. Rodrigues - João N. Isento - Paulo R. B. A. Pereira - Jaime Lloret


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