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ThinkMind // International Journal On Advances in Telecommunications, volume 11, numbers 1 and 2, 2018 // View article tele_v11_n12_2018_2


Experimental Analysis and Resolution Proposal on Performance Degradation of TCP over IEEE 802.11n Wireless LAN Caused by Access Point Scanning

Authors:
Toshihiko Kato
Kento Kobayashi
Sota Tasaki
Masataka Nomoto
Ryo Yamamoto
Satoshi Ohzahata

Keywords: WLAN; IEEE802.11n; Access Point Scanning; Power Management; TCP Small Queues; TCP Congestion Window Validation; NetworkManager; Linux Kernel Module.

Abstract:
In IEEE 802.11 wireless LAN, there is a problem that the access point scanning at stations which uses the power management function gives impacts on the performance of TCP communication. This paper is an extension of our previous paper that showed the result of experiments on this problem for uploading and downloading TCP data transfer over 802.11n wireless LAN. For the uploading transfer, we analyze the influence to TCP throughput focusing on the TCP small queues that limit the amount of data in wireless LAN's sending queue. We add some new results and discussions to the previous paper. As for the downloading transfer, we discuss the influence by the TCP congestion control algorithm at TCP senders and A-MPDU transmission rate at the access point. We also propose a method to stop access point scanning while data transfer is being performed, and show the results of the performance evaluation of the proposed method implemented on the Linux operating system.

Pages: 10 to 19

Copyright: Copyright (c) to authors, 2018. Used with permission.

Publication date: June 30, 2018

Published in: journal

ISSN: 1942-2601

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