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Investigation of the TCP Simultaneous-Send Problem in 802.11 Wireless Local Area Networks

Overview This paper investigates the TCP simultaneous-send problem which arises in infrastructure mode 802.11 wireless local area networks. In particular it has been observed that for file transfer traffic, 802.11 wireless nodes have a sustained supply of packets to send and hence experience a relatively high rate of MAC contention. For TCP, this result in competition among data and ACK packets for channel access which causes the simultaneous-send problem that deteriorates flow throughput. This simultaneous-send problem can be alleviated by skipping TCP ACKs. Detailed simulation results are presented to demonstrate the usefulness of ACK skipping in various network scenarios such as with MAC retries and multiple TCP flows.

Further White Paper Details
Publisher	Alcatel-Lucent	File Format	PDF
Date Published	February 2005
Format	White Papers
Topics	Wireless LAN, TCP - IP, Wi-Fi (802.11)

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