Adaptive Packetization for Error-Prone Transmission Over 802.11 WLANs With Hidden Terminals

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Executive Summary

Collision and fading are the two main sources of packet loss in Wireless Local Area Networks (WLANs) and as such, both are affected by the packetization at the Medium Access Control (MAC) layer. While a larger packet is preferred to balance protocol header overhead, a shorter packet is less vulnerable to packet loss due to channel fading errors or staggered collisions in the presence of hidden terminals. Direct collisions due to backoff are not affected by packet size. Recently, Krishnan et. al. have developed a new technique for estimating probabilities of various components of packet loss, namely, direct and staggered collisions and fading.

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