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Intelligent Handoff for Mobile Wireless Internet
Authors:Jon Chiung-Shien Wu  Chieh-Wen Cheng  Nen-Fu Huang  Gin-Kou Ma
Affiliation:(1) Philips Research East Asia – Taipei 24FA, 66, Sec. 1, Chung Hsiao W. Rd., P.O. Box, 22978 Taipei 100, Taiwan, R.O.C.;(2) Department of Computer Science, National Tsing Hua University, Hsinchu, Taiwan, R.O.C;(3) Electronics Research & Service Organization, Industrial Technology Research Institute, Chutung, Hsinchu, Taiwan, 310 R.O.C
Abstract:This paper presents an intelligent mobility management scheme for Mobile Wireless InterNet – MWIN. MWIN is a wireless service networks wherein its core network consisting of Internet routers and its access network can be built from any Internet-capable radio network. Two major standards are currently available for MWIN, i.e., the mobile IP and wireless LAN. Mobile IP solves address mobility problem with the Internet protocol while wireless LAN provides a wireless Internet access in the local area. However, both schemes solve problems independently at different layers, thereby some additional problems occur, e.g., delayed handoff, packet loss, and inefficient routing. This paper identifies these new problems and performs analyses and some real measurements on the handoff within MWIN. Then, a new handoff architecture that extends the features of both mobile IP and wireless LAN handoff mechanism was proposed. This new architecture consists of mobile IP extensions and a modified wireless LAN handoff algorithm. The effect of this enhancement provides a linkage between different layers for preventing packet loss and reducing handoff latency. Finally, some optimization issues regarding network planning and routing are addressed.
Keywords:mobile Internet  wireless Internet  wireless data networks
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