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Performance Anomaly in Download TCP Flows Over IEEE 802.11n Wireless LAN

Authors:
Yoshiki Hashimoto
Masataka Nomoto
Celimuge Wu
Satoshi Ohzahata
Toshihiko Kato

Keywords: WLAN; IEEE802.11n; Performance Anomaly, TCP flows

Abstract:
The performance anomaly is one of well-known performance problems in IEEE 802.11 wireless LANs (WLANs). It reduces the throughput of all stations managed by one access point when some of them use low data rates even if the others use high rates. In the recent WLANs, such as 802.11n WLAN, providing higher data rates than the legacy ones, the performance degradation due to the performance anomaly may give larger impacts. In the previous paper, we showed the evaluations of the performance anomaly for UDP and TCP flows over 802.11n WLAN. The results show that, although the performance anomaly occurs for UDP flows, the situation is different for TCP flows. This paper presents more detailed experimental performance study on the performance anomaly for download TCP flows analyzing the throughput, the congestion window size (cwnd) and the round trip time (RTT). It concludes that, although the throughput degrades where there are low data rate stations, the so called performance anomaly does not occur in download TCP flows.

Pages: 13 to 18

Copyright: Copyright (c) IARIA, 2016

Publication date: August 21, 2016

Published in: conference

ISSN: 2326-9286

ISBN: 978-1-61208-503-6

Location: Rome, Italy

Dates: from August 21, 2016 to August 25, 2016