Vertical handoffs in wireless overlay networks
Mobile Networks and Applications - Special issue: mobile networking in the Internet
IEEE Transactions on Mobile Computing
Policy-Enabled Handoffs Across Heterogeneous Wireless Networks
WMCSA '99 Proceedings of the Second IEEE Workshop on Mobile Computer Systems and Applications
IEEE Network: The Magazine of Global Internetworking
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One of the major design issues in wireless overlay networks is the support of vertical handoff. It is becoming essential to offer vertical handoff solutions where users can move among various network types efficiently and seamlessly. Vertical handoff is the switching process between heterogeneous wireless networks. In this paper, we propose and analyze a novel vertical handoff decision strategy that considers the performance of the whole system. This strategy takes into account the network bandwidth, received signal strength (RSS) and variation of RSS. The performance comparison of the proposed vertical handoff decision scheme and existing scheme shows that the proposed scheme can reduce the handoff call dropping probability.