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Multiservice vertical handoff decision algorithms

EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING 2006年第1期2006卷 025861-025861页

作者： Zhu, Fang McNair, Janise Univ Florida Dept Elect & Comp Engn Wireless & Mobile Syst Lab Gainesville FL 32611 USA

Future wireless networks must be able to coordinate services within a diverse-network environment. One of the challenging problems for coordination is vertical handoff, which is the decision for a mobile node to handoff between different types of networks. While traditional handoff is based on received signal strength comparisons, vertical handoff must evaluate additional factors, such as monetary cost, offered services, network conditions, and user preferences. In this paper, several optimizations are proposed for the execution of vertical handoff decision algorithms, with the goal of maximizing the quality of service experienced by each user. First, the concept of policy-based handoffs is discussed. Then, a multiservice vertical handoff decision algorithm (MUSE-VDA) and cost function are introduced to judge target networks based on a variety of user- and network-valued metrics. Finally, a performance analysis demonstrates that significant gains in the ability to satisfy user requests for multiple simultaneous services and a more efficient use of resources can be achieved from the MUSE-VDA optimizations.

关键词： .network conditions signal strength user requests Multiservice Vertical decision algorithms vertical hando decision hando decision algorithm

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