This paper reanalyzes the relationship between MAC contention and TCP congestion control misled in previous efforts. By introducing a prioritized access of an access point, we seek to allow the optimal number of competing stations to contend for media access. The most of Internet applications use Transmission Control Protocol (TCP) as their transport layer protocols; however, TCP shows poor performance in wireless environments. Thus, there have been efforts to improve TCP throughput in IEEE 802.11 wireless LANs. They blindly assume that the number of competing stations at the MAC layer is increasing as there are more stations with TCP flows, which is not true under the congested network condition.
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