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Impact of Periodic Channel Scanning on the TCP Throughput in a WLAN
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 Title & Authors
Impact of Periodic Channel Scanning on the TCP Throughput in a WLAN
Hwang, Jaeryong; Choi, Jaehyuk;
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In this paper, we address the TCP-over-WLAN performance problem that occurs during periodic active background scanning with which mobile devices discover available APs in the vicinity. We measure the impact of the scanning period on the TCP throughput and observe a significant performance degradation when the scan operation period is shortened. Our experimental analysis has identified the main cause of the problem, that is, the associated AP continues to send packets to the mobile device even when the device is not able to receive due to the scanning operation.
Wireless LAN;periodic scanning;TCP throughput;
 Cited by
H. Choi, C. Lee, S. Lee, and J. Kim, "Design and implementation of a multi-interface mobile gateway for seamless handoff sciences," J. Commun. Networks (JCN), vol. 37, no. 6, pp. 474-482, Jun. 2012.

H. Wu, K. Tan, Y. Zhang, and Q. Zhang, "Proactive scan: Fast handoff with smart triggers for 802.11 wireless LAN," in Proc. IEEE INFOCOM 2007, pp. 749-757, Anchorage, Alaska, May 2007.

S. Lee, M. Kim, S. Kang, K. Lee, and I. Jung, "Smart scanning for mobile devices in WLANs," in Proc. IEEE ICC 2012, pp. 4960- 4964, Ottawa, Canada, Jun. 2012.