A Novel MAC Protocol of Wireless LAN with High Throughput and Fairness

In this paper, we propose a novel MAC scheme that dynamically optimizes each active node's backoff process. Through theoretical analysis, we find that the average channel idle interval can represent current network traffic load and then can used together with estimated number of nodes for setting optimal CW. Since necessary indexes can be obtained through direct measurement, our scheme will not increase any added load to networks, which makes our schemes simpler and more reliable when network traffic reaches saturated. Through simulation comparison with previous schemes, we show that our scheme can greatly improve the throughput no matter the network is in saturated or non-saturated case, while maintaining good fairness.