Mobility

A Near-Optimal Broadcast Technique for Vehicular Networks

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Executive Summary

A vehicular network is a promising application of mobile ad hoc networks. In this paper, the authors introduce a near-optimal broadcast technique, called CB-S (Cell Broadcast for Streets), for vehicular networks. In this environment, the road network is fragmented into cells such that nodes in a cell can communicate with any node within a two cell distance. Each mobile node is equipped with a GPS (Global Positioning System) unit and a map of the cells. The cell map has information about the cells including their identifier and the coordinates of the upper-right and lower-left corner of each cell. CB-S has the following desirable property. Broadcast of a message is performed by re-broadcasting the message from every other cell in the terrain.

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