The Society of Digital Information and Wireless Communications (SDIWC)
In this paper, the authors investigate performance anomaly of IEEE 802.11 multi-rate WLAN with respect to throughput and fairness. Even though in a given WLAN, hosts with different transmission rates exist, IEEE 802.11 allows the users' to only transmit equal-sized frames. This is unfair and reduces the overall throughput of the network. A new technique is proposed in this paper to mitigate this problem by making the transmission time of the host equal instead, thereby adjusting their packet sizes in proportion to their individual transmission rates. Analytical and simulation analyses show that the proposed scheme eliminates the anomaly by improving the throughput and Fairness Index (FI) of a given WLAN.