A Scheduling Algorithm of AP for Alleviating Unfairness Property of Upstream-Downstream TCP Flows in Wireless LAN
Do-Hyun Lim, Seung‐Joon Seok · Journal of Korea Multimedia Society · 2009
There is a serious unfairness problem between upstream and downstream flows of AP in IEEE 802.11 Wireless LAN. This problem is because Wireless LAN's DCF MAC protocol provides AP with equal channel access priority to mobile noded. Also, it makes this problem worse that the TCP's Data segment loss is more effective on throughput than the TCP's ACK segment. In this paper, we first make several simulations to analysis the unfairness in the various point of view and to find reasons of the unfairness. Also, this paper presents AP's scheduling scheme to alleviate the unfairness problem and evaluate the scheme through ns2 simulator.