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Title: Proactive AP Selection Method Considering the Radio Interference Environment
Authors: Taenaka, Yuzo
Kashihara, Shigeru
Tsukamoto, Kazuya
Yamaguchi, Suguru
Oie, Yuji
Issue Date: Oct-2009
Publisher: Institute of Electronics, Information and Communication Engineers
Volume: E92D
Issue: 10
Start page: 1867
End page: 1876
Abstract: 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.
ISSN: 0916-8532
Rights: Copyright (C)2009 IEICE
Text Version: publisher
Publisher DOI: 10.1587/transinf.E92.D.1867
Appears in Collections:情報科学研究科 / Graduate School of Information Science

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