TFBR: A New Queue Management Guaranteeing TCP Fairness Based on TCP Advertised Receiving Windows Over WLAN

This paper focuses on TCP fairness over WLAN and proposes a new active queue management (TFBR) to solve the TCP unfairness between TCP upstream flows and downstream flows. The proposed TFBR modifies the drop tail, and controls the sender rate by setting the advertised receiver window of the packets in queue of the access point (AP) before executing drop tail program. The key point of the scheme is to choose the appropriate value of the advertised receiver window to realize the TCP fairness between upstream and downstream flows and to guarantee available total throughput when link delay changes. Under TFBR, the bandwidth assignment between TCP uplinks and downlinks is equal and the total throughput is ensured. Simulation results exhibit the efficiency and performance of TFBR