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http://dx.doi.org/10.13089/JKIISC.2005.15.2.81

Authenticated Handoff with Low Latency and Traffic Management in WLAN  

Choi Jae-woo (Inha University)
Nyang Dae-hun (Inha University)
Kang Jeon-il (Inha University)
Publication Information
Journal of the Korea Institute of Information Security & Cryptology / v.15, no.2, 2005 , pp. 81-94 More about this Journal
Abstract
Recently, wireless LAN circumstance is being widely deployed in Public spots. Many People use Portable equipments such as PDA and laptop computer for multimedia applications, and also demand of mobility support is increasing. However, handoff latency is inevitably occurred between both APs when clients move from one AP to another. To reduce handoff latency. in this paper, we suggest WFH(Weighted Frequent Handoff) using effective data structure. WFH improves cache hit ratio using a new cache replacement algorithm considering the movement pattern of users. It also reduces unessential duplicate traffics. Our algorithm uses FHR(Frequent Handoff Region) that can change pre-authentication lesion according to QoS based user level, movement Pattern and Neighbor Graph that dynamically captures network movement topology.
Keywords
handoff; proactive caching; traffic; cache-hit; WLRU(Weighted Least Recently Used);
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