Mobility

Message Dissemination in Inter-Vehicle CDMA Networks for Safety Driving Support

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Executive Summary

Although the near-far effect has been considered to be the major issue preventing CDMA from being used in ad-hoc networks, in this paper, the authors show that the near-far effect is not a severe issue in inter-vehicle networks for safety driving support, where packet transmissions are performed in the broadcast manner. Indeed, the near-far effect provides extremely reliable transmissions between near nodes, regardless of node density, which can not be achieved by CSMA/CA. However, CDMA can not be directly applied in realistic traffic accident scenarios, where highly reliable transmissions are required between far nodes as well.

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