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Experimental Evaluation of Decision Criteria for WLAN handover: Signal Strength and Frame Retransmission
著者
  Kazuya Tsukamoto, Takeshi Yamaguchi, Shigeru Kashihara, Yuji Oie
 
雑誌名/会議名
  Proc. 2006 International Symposium on Ubiquitous Computing Systems (UCS2006), LNCS4239, pp. 239-253, Seoul, Korea 2006 年 10 月
 
アブストラクト
  In ubiquitous networks, Mobile Nodes (MNs) may often suffer from performance degradation due to the following two reasons: (1) reduction of signal strength by an MN’s movement and intervening objects, and (2) radio interference with other WLANs. Therefore, quick and reliable detection of the deterioration of a wireless link condition is essential for avoiding the degradation of the communication quality during handover. In our previous works, we focused on a handover decision criterion allowing MNs to maintain communication quality and stated the problems of existing decision criteria. Furthermore, we showed the effectiveness of the number of frame retransmissions through simulation experiments. However, a comparison between signal strength and the number of frame retransmissions could not be examined due to the unreliability of signal strength in simulations. Therefore, in this paper, by employing FTP and VoIP applications, we compare signal strength and the number of frame retransmissions as a handover decision criterion with experiments in terms of (1) and (2) in a real environment. Finally, we show the problems of signal strength in contrast to the effectiveness of the number of frame retransmissions as a handover decision criterion.
 
キーワード
  Mobile, Wireless
 
記述言語
  English
 
 

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