Proactive AP Selection Method Considering the Radio Interference Environment
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概要
- 論文の詳細を見る
In the near future, wireless local area networks (WLANs) will overlap to provide continuous coverage over a wide area. In such ubiquitous WLANs, a mobile node (MN) moving freely between multiple access points (APs) requires not only permanent access to the Internet but also continuous communication quality during handover. In order to satisfy these requirements, an MN needs to (1) select an AP with better performance and (2) execute a handover seamlessly. To satisfy requirement (2), we proposed a seamless handover method in a previous study. Moreover, in order to achieve (1), the Received Signal Strength Indicator (RSSI) is usually employed to measure wireless link quality in a WLAN system. However, in a real environment, especially if APs are densely situated, it is difficult to always select an AP with better performance based on only the RSSI. This is because the RSSI alone cannot detect the degradation of communication quality due to radio interference. Moreover, it is important that AP selection is completed only on an MN, because we can assume that, in ubiquitous WLANs, various organizations or operators will manage APs. Hence, we cannot modify the APs for AP selection. To overcome these difficulties, in the present paper, we propose and implement a proactive AP selection method considering wireless link condition based on the number of frame retransmissions in addition to the RSSI. In the evaluation, we show that the proposed AP selection method can appropriately select an AP with good wireless link quality, i.e., high RSSI and low radio interference.
- 2009-10-01
著者
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OIE Yuji
Graduate School of Computer Science and Systems Engineering, Kyushu Institute of Technology
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KASHIHARA Shigeru
Graduate School of Information Scinece, Nara Institute of Science and Technology
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YAMAGUCHI Suguru
Graduate School of Information Scinece, Nara Institute of Science and Technology
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OIE Yuji
Dept. of Computer Science & Electronics, Kyushu Institute of Technology
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Oie Yuji
Kyushu Inst. Of Technol. Iizuka‐shi Jpn
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Oie Yuji
Dept. Of Computer Science & Electronics Kyushu Institute Of Technology
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Yamaguchi Suguru
Graduate School Of Information Science Nara Institute Of Science And Technology
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Tsukamoto Kazuya
Graduate School Of Computer Science And Electronics Department Of Computer Science And Electronics K
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Kashihara Shigeru
Graduate School Of Information Science Nara Institute Of Science And Technology
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Kashihara Shigeru
Graduate School Of Information Science Nara Institute Of Science And Technology (naist)
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Taenaka Yuzo
Nara Inst. Of Sci. And Technol. Nara Jpn
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TAENAKA Yuzo
Graduate School of Engineering, The University of Tokyo
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Yamaguchi S
Graduate School Of Information Science Nara Institute Of Science And Technology
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Tsukamoto Kazuya
Kyushu Inst. Of Technol. Fukuoka Jpn
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TSUKAMOTO Kazuya
Dept. of Computer Science and Electronics, Kyushu Institute of Technology
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Taenaka Yuzo
Graduate School Of Engineering The University Of Tokyo:information Technology Center The University
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