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Reliable Neighborcast

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3 Author(s)
Maxemchuk, N.F. ; Columbia Univ., New York ; Tientrakool, P. ; Willke, T.L.

In this paper, we introduce a new communications paradigm, namely, reliable neighborcast, and present a reliable neighborcast protocol (RNP) that operates as an overlay on the existing reliable broadcast protocols. The protocol is intended for vehicle-to-vehicle communications networks that communicate the speed, position, and state of nearby vehicles to coordinate or control their operation. The implementation of RNP that we describe operates on top of overlapping groups that use the mobile reliable broadcast protocol and provides the guarantees and characteristics of that protocol to each neighborhood. The efficiency of the overlays - defined as the fraction of the received messages that apply to a neighborhood - widely varies. We present an efficient overlay for 1D networks, which is implemented in many highway applications. The characteristics of mobility are considered, and techniques are presented to eliminate delays as vehicles change neighborhoods and to move the underlying broadcast groups with the general flow of traffic.

Published in:

Vehicular Technology, IEEE Transactions on  (Volume:56 ,  Issue: 6 )