Optimizations for vertical handoff decision algorithms
Optimizations for vertical handoff decision algorithms
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DOI：
10.1109/wcnc.2004.1311300
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发表时间：
2004-03
期刊：
影响因子：
--
通讯作者：
Fangjun Zhu;J. Mcnair
中科院分区：
文献类型：
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作者：
Fangjun Zhu;J. Mcnair
未来的无线网络必须能够在多样化的网络环境中协调服务。协调最具挑战性的问题之一是垂直切换，即移动节点在不同类型网络之间进行切换的决策。传统切换基于接收信号强度比较，而垂直切换必须评估其他因素，例如货币成本、提供的服务、网络条件和用户偏好。在本文中，针对垂直切换决策算法的执行提出了几种优化，其目标是最大化每个用户体验的服务质量。首先，讨论基于策略的切换的概念。然后，定义成本函数以根据各种用户和网络价值指标来判断目标网络。最后，性能分析表明，所提出的优化可以显着提高服务质量并更有效地利用资源。
Future wireless networks must be able to coordinate services within a diverse network environment. One of the most 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 cost function is defined to judge target networks based on a variety of user- and network-valued metrics. Finally, a performance analysis demonstrates that significant gains in quality of service and a more efficient use of resources can he achieved from the proposed optimizations.