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Impact of Layer 2 Behavior on TCP Performance in WLAN
著者
  Kazuya Tsukamoto, Ryouichi Ijima, Shigeru Kashihara, Yuji Oie
 
雑誌名/会議名
  IEEE 62nd Semiannual Vehicular Technology Conference (VTC2005-fall), CD-ROM, 25-28 Sep. 2005, Dallas, Texas, USA 2005 年 9 月
 
アブストラクト
  Ubiquitous networks enabling access by Mobile Nodes (MNs) at any time and at any location will consist of several different wireless LANs (WLANs), so it is likely that an MN will traverse several WLANs during communication. In such a case, avoiding performance degradation during the handoff becomes a critical issue. The majority of existing studies deal with handoff decisions based on upper layer information such as packet loss, but none of the studies extensively examine the criteria for a handoff decision and investigate how the criteria can affect the performance degradation just before the handoff is executed. In this paper, we first extensively investigate the TCP performance under the criteria for the handoff decision employed by existing studies. Then, we deal with Layer 2 behavior and suggest that a cross-layer approach, which enables an MN to perceive the deterioration of a wireless link quickly and exactly, is necessary to avoid the performance degradation during a handoff. Finally, we identify how the movement of the MN affects the overall TCP performance of its WLAN and its own TCP performance. Through simulations, we show that degradation during a handoff can effectively be avoided by exploiting Layer 2 information.
 
キーワード
  Mobile, Wireless
 
記述言語
  English
 
 

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