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Contention-Based Forwarding for Street Scenarios

Author(s): Holger Füßler, Hannes Hartenstein, Jörg Widmer, Martin Mauve, Wolfgang Effelsberg.
Title: Contention-Based Forwarding for Street Scenarios
Published: Proceedings of the 1st International Workshop in Intelligent Transportation (WIT 2004), pp. 155-160, Hamburg, Germany, March 2004
Keyword(s): Mobile Ad-Hoc Networks, Routing, Car-to-Car Communication
Abstract: In this paper, we propose to apply Contention-Based Forwarding(CBF) to Vehicular Ad Hoc Networks (VANETs). CBF is a greedyposition-based forwarding algorithm that does not require proactivetransmission of beacon messages. CBF performance is analyzed usingrealistic movement patterns of vehicles on a highway. We show bymeans of simulation that CBF as well as traditional position-basedrouting (PBR) achieve a delivery rate of almost 100% given thatconnectivity exists. However, CBF has a much lower forwardingoverhead than PBR since PBR can achieve high delivery ratios only byimplicitly using a trial-and-error next-hop selection strategy. WithCBF, a better total throughput can be achieved. We further discussseveral optimizations of CBF for its use in VANETs, in particular anew position-encoding scheme that naturally allows for communicationparadigms such as `street geocast' and `street flooding'. Thediscussions show that CBF can be viewed as a concept for convergenceof intelligent flooding, geocast, and multi-hop forwarding in the areaof inter-vehicle communication.
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