• Title/Summary/Keyword: proactive caching

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Authenticated Handoff with Low Latency and Traffic Management in WLAN (무선랜에서 낮은 지연 특성을 가지는 인증유지 핸드오프 기법과 트래픽 관리 기법)

  • Choi Jae-woo;Nyang Dae-hun;Kang Jeon-il
    • Journal of the Korea Institute of Information Security & Cryptology
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    • v.15 no.2
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    • pp.81-94
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    • 2005
  • 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.