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Paper Abstract and Keywords
Presentation 2005-07-15 09:10
Investigation of Novel Decision Criteria for Efficient Handover in WLANs
Ryouichi Ijima, Kazuya Tsukamoto (KIT), Shigeru Kashihara (NAIST), Yuji Oie (KIT)
Abstract (in Japanese) (See Japanese page) 
(in English) Ubiquitous networks enabling access by mobile nodes (MNs) at anytime and at any location will consists of several different WLANs, so that it is likely that the MN will traverse several WLANs during communication. In such a case, how to avoid performance degradation during the handover becomes a critical issue. Majority of existing studies deal with handover decisions based on the upper layer information such as packet loss, but none of them extensively examine the criteria for a handover decision, and investigate how it can affect the performance degradation just before the handover is decided to be executed. In this paper, we first extensively investigate the TCP performance under the criteria for handover decision employed by existing studies. Then, we deal with the Layer 2 behavior, and employ that a cross-layer approach, which enables a MN to perceive the deterioration of wireless link quickly and exactly, is necessary to avoid the performance degradation during a handover. 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 handover can effectively be avoided by exploiting Layer 2 information.
Keyword (in Japanese) (See Japanese page) 
(in English) Wireless LANs / handover / criteria / frame retry / cross-layer / / /  
Reference Info. IEICE Tech. Rep., vol. 105, no. 178, IN2005-40, pp. 67-72, July 2005.
Paper # IN2005-40 
Date of Issue 2005-07-07 (IN) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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Conference Information
Committee IN  
Conference Date 2005-07-14 - 2005-07-15 
Place (in Japanese) (See Japanese page) 
Place (in English) Hokkaido University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Broadband Service, Overlay Networking 
Paper Information
Registration To IN 
Conference Code 2005-07-IN 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Investigation of Novel Decision Criteria for Efficient Handover in WLANs 
Sub Title (in English)  
Keyword(1) Wireless LANs  
Keyword(2) handover  
Keyword(3) criteria  
Keyword(4) frame retry  
Keyword(5) cross-layer  
1st Author's Name Ryouichi Ijima  
1st Author's Affiliation Kyushu Institute of Technology (KIT)
2nd Author's Name Kazuya Tsukamoto  
2nd Author's Affiliation Kyushu Institute of Technology (KIT)
3rd Author's Name Shigeru Kashihara  
3rd Author's Affiliation Nara Institute of Science and Technology (NAIST)
4th Author's Name Yuji Oie  
4th Author's Affiliation Kyushu Institute of Technology (KIT)
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Date Time 2005-07-15 09:10:00 
Presentation Time 20 
Registration for IN 
Paper # IEICE-IN2005-40 
Volume (vol) IEICE-105 
Number (no) no.178 
Page pp.67-72 
#Pages IEICE-6 
Date of Issue IEICE-IN-2005-07-07 

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