Performance Evaluation of an Enhanced GDCF under Normal Traffic Condition

IEEE 802.11 is one of the most interesting technology in wireless local area networks. In this paper, we investigate performance of IEEE 802.11 DCF (distributed coordination function) and an enhanced GDCF (gentle DCF) in terms of throughput and MAC delay under normal traffic condition. We also present an analytical model for the enhanced GDCF MAC delay under saturation condition. From the results, the performance of the enhanced GDCF is nearly same as that of conventional DCF for light traffic load, but the enhanced GDCF yields better performance than the conventional DCF for heavy traffic load.