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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
  IEICE Transactions on Communications 2007 年 12 月
 
アブストラクト
  In ubiquitous networks, Mobile Nodes (MNs) often suffer from performance degradation due to the following two reasons: (1) reduction of signal strength by the movement of an MN and intervening objects, and (2) radio interference with other WLANs. Therefore, handover initiation based on quick and reliable detection of the deterioration in a wireless link condition arising from the above two reasons is essential for achieving seamless handover. In previous studies, we focused on a handover decision criterion and described the problems related to the two existing decision criteria. Furthermore, we showed the effectiveness of the number of frame retransmissions through simulation experiments. However, a comparison of the signal strength and the number of frame retransmissions could not be examined due to the unreliability of the signal strength in simulations. Therefore, in the present paper, by employing FTP and VoIP applications, we compare the 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 clarify the problem of the signal strength in contrast to the effectiveness of the number of frame retransmissions as a handover decision criterion.
 
キーワード
  Mobile, Transport protocol, Wireless
 
記述言語
  English
 
 

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