A Simple and Robust Vertical Handoff Algorithm for Heterogeneous Wireless Mobile Networks |
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Authors: | Daojing He Caixia Chi Sammy Chan Chun Chen Jiajun Bu Mingjian Yin |
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Affiliation: | (1) Telecommunications Research Lab, School of Computing, Queen’s University Kingston, Ontario, Canada, K7L 3N6;(2) Department of Computing and Information Science, University of Guelph, Guelph, Ontario, Canada, N1G 2W1 |
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Abstract: | Wireless networking is becoming an increasingly important and popular way of providing global information access to users
on the move. One of the main challenges for seamless mobility is the availability of simple and robust vertical handoff algorithms,
which allow a mobile node to roam among heterogeneous wireless networks. In this paper, motivated by the facts that vertical
handoff procedure is done on mobile nodes and battery power may be one crucial parameter for certain mobile nodes, a simple
and robust two-step vertical handoff decision algorithm is proposed for heterogeneous wireless mobile networks. To the best
of our knowledge, this is the first vertical handoff algorithm that takes the classification of mobile nodes into consideration,
one is resource-poor mobile nodes, and the other is resource-rich mobile nodes. This new feature makes it more applicable
in the real world. In addition, dynamic new call blocking probability is firstly introduced by this paper to make handoff
decision for wireless networks. The experiment results have shown that the proposed algorithm outperforms traditional algorithms
in bandwidth utilization, handoff dropping rate and handoff rate. |
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