An adaptive scheme for vertical handoff in wireless overlay networks
An adaptive scheme for vertical handoff in wireless overlay networks
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DOI：
10.1109/icpads.2004.16
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发表时间：
2004-07
期刊：
影响因子：
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通讯作者：
Wen-Tsuen Chen;Jen-Chu Liu;Hsieh-Kuan Huang
中科院分区：
文献类型：
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作者：
Wen-Tsuen Chen;Jen-Chu Liu;Hsieh-Kuan Huang
垂直切换是指异构无线网络之间的切换过程。发现可到达的无线网络是垂直切换的第一步。发现可达的候选网络后，移动终端决定是否进行切换。提出了一种无线覆盖网络中垂直切换的自适应方案。我们的系统发现方法有效地发现了移动终端的候选网络。此外，我们提出了两种基于候选者资源和正在运行的应用程序的移动端自适应评估方法来确定切换时间。仿真结果表明，所提出的系统发现方法能够平衡系统功耗和系统发现时间。此外，所提出的切换决策方法可以确定执行切换的适当时间。
Vertical handoff is the switching process between heterogeneous wireless networks. Discovering the reachable wireless networks is the first step for vertical handoff. After discovering the reachable candidate networks, the mobile terminal decides whether to perform handoff or not. We present an adaptive scheme for vertical handoff in wireless overlay networks. Our system discovery method effectively discovers the candidate networks for the mobile terminal. Moreover, we propose two adaptive evaluation methods for the mobile terminal to determine the handoff time that relies on the candidates' resources and the running applications. The simulation results show that the proposed system discovery method can balance the power consumption and the system discovery time. Furthermore, the proposed handoff decision method can decide the appropriate time to perform handoff.