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Title
Japanese:無線LAN環境の品質分析のためのアクティブ・パッシブ複合計測手法 
English:Combined Active and Passive Measurement System for Quality Analysis of Wireless LAN Environments 
Author
Japanese: 石原 知洋, 北口 善明.  
English: Tomohiro Ishihara, Yoshiaki Kitaguchi.  
Language Japanese 
Journal/Book name
Japanese:情報処理学会研究報告 
English:IPSJ SIG Technical Reports 
Volume, Number, Page Vol. 2023-IOT-65    No. 24    pp. 1-6
Published date May 2024 
Publisher
Japanese:一般社団法人 情報処理学会 
English:Information Processing Society of Japan 
Conference name
Japanese:第65回 インターネットと運用技術 (IOT) 研究会 
English: 
Conference site
Japanese: 
English: 
Official URL http://id.nii.ac.jp/1001/00234144/
 
Abstract In this study, we propose a comprehensive approach combining active and passive measurements to efficiently evaluate the performance and troubleshoot wireless LANs. Our existing active measurement tool, SINDAN, conducts multi-layer verification from the wireless layer to the application layer. However, it may overlook the impact of minor anomalies in lower layers on the measurement results of other layers. To address this issue, we perform wireless frame and IP packet captures in parallel with the active measurements of wireless LANs, synchronizing the timestamps of each measurement item. This enables us to conduct corre- lation analysis between the measurement contents and the captured frames. Our proposed method makes it possible to determine whether problems detected in upper-layer measurements originate from issues in lower layers during multi-layer measurements. We apply the proposed method to the following three scenarios to verify its effectiveness: 1) Communication failures caused by radio interference, 2) Performance degradation due to wireless LAN access point configuration, 3) Throughput reduction caused by traffic congestion on wireless LANs.

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