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COS-based inter-switch handoffs in wireless ATM: pitfalls and solutions

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2 Author(s)
Jianping Jiang ; Dept. of Comput. & Inf. Sci., Ohio State Univ., Columbus, OH, USA ; Ten-Hwang Lai

Handoff in a wireless ATM network is an important and challenging problem. Previous research on this topic suggested using a cross-over switch (COS) for inter-switch handoffs. One overlooked problem with COS based handoff schemes is the possible disjointed connection for a mobile-to-mobile communication. Although one may argue that this may occur only occasionally, it does present a serious design flaw and should be corrected. We propose a general approach and a permission based inter-switch handoff protocol for mobile-to-mobile connection in wireless ATM networks. The proposed approach/protocol takes advantages of the ATM PNNI hierarchical information to detect potentially “unsafe” handoffs. Analysis shows that our approach/protocol avoids disjointed connection for mobile-to-mobile connections while keeping the overhead low

Published in:

Wireless Communications and Networking Conference, 1999. WCNC. 1999 IEEE

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