Title: Cross-layer Mobile Chord P2P protocol design for VANET

Authors: Che-Liang Liu, Chih-Yu Wang, Hung-Yu Wei

Addresses: Department of Electrical Engineering, National Taiwan University, Taiwan. ' Graduate Institute of Communication Engineering, National Taiwan University, Taiwan. ' Department of Electrical Engineering and Graduate Institute of Communication Engineering, National Taiwan University, Taiwan

Abstract: Efficient content distribution is one of the emerging applications in vehicular networks. To provide scalable content distribution in vehicular networks, Chord Peer-to-Peer (P2P) overlay could be applied. Most P2P protocols, including Chord, are designed for wired-line network, and might perform poorly in mobile networks. Mobile Chord (MChord) is proposed to enhance the P2P performance over Vehicular Ad hoc Network (VANET). In addition, cross-layer design to improve MChord performance in VANET is also investigated. Extensive NS-2 simulations with vehicular mobility traces are conducted to evaluate the P2P overlay performance in VANET. MChord and its cross-layer design outperforms the original Chord in various aspects, including application layer forwarding steps, query response ratio, correct query response ratio, and application delay.

Keywords: VANETs; vehicular ad hoc networks; peer-to-peer networks; P2P networks; cross-layer design; vehicular networks; mobile networks; simulation; P2P overlay; query response.

DOI: 10.1504/IJAHUC.2010.034968

International Journal of Ad Hoc and Ubiquitous Computing, 2010 Vol.6 No.3, pp.150 - 163

Published online: 31 Aug 2010 *

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