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A Micro Mobility Management Scheme in Wireless LAN Environments  

고광신 (성화대학 인터넷정보계열)
차우석 (전북대학교 컴퓨터통계정보학)
김형준 (한국전자통신연구)
조기환 (전북대학교 전자정보공학부)
Publication Information
Journal of KIISE:Information Networking / v.31, no.2, 2004 , pp. 158-170 More about this Journal
Abstract
Mobile IP is a base protocol to support host mobility in IP-based wireless network. It is well known that the protocol contains two main delay factors on a handoff process; one is to detect a host movement, and the other is to register the host's current location to its home network. This paper examines Layer 2(L2) handoff procedure in the IEEE 802.11 Wireless LAN, and identifies these L2 triggers that can be usefully applied to Layer 3(L3) handoff. Then, the MCAA(Multiple-Casting using Anchor Agent) mechanism is proposed. It makes use of the L2 trigger and the network topology to construct an anchor agent dynamically, and the multiple-casting scheme to prevent an ongoing packet to be lost. Using a network simulator, the proposed mechanism has been evaluated the handoff delay and the packet lost point of view, in comparison with the regional registration protocol which is the most well known micro mobility support mechanism.
Keywords
Mobile IP; Wireless LAN; Mobile IP; Micro Mobility; Multiple-Casting; Anchor Agent; L2 trigger;
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