Design of a robust self-adapt DCF-based protocol

Numerous researches have shown that the original DCF access mode of IEEE 802.11 has low performance in case of heavy traffic environment. Based on the analysis of previous IEEE 802.11 DCF, we have proposed a parameter that closely relative to the traffic load of the current wireless LAN and formed a new DCF-based protocol with the name of NSAD (new self-adapt DCF-based protocol). NSAD is proved effective in the error-free environment. In this paper, we proposed some new mechanisms to further enhance the performance of NSAD and formed a new MAC mechanism RSAD (robust self-adapt DCF-based protocol). We have done simulation in a more real environment than we do in NSAD. The simulation results have shown that the proposed RSAD can achieve better performance when compared with the original NSAD algorithm in an error-prone environment (e.g. better property in goodput and window tuning accuracy).