基于模糊逻辑的WLAN与WWAN垂直切换决策算法

Qing He
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引用次数: 40

摘要

下一代无线通信将集成多种无线接入网络,包括无线广域网(WWAN)和无线局域网(WLAN)。垂直切换决策在异构网络中起着重要的作用。本文提出了一种基于模糊逻辑的垂直切换决策算法(VHDA),以提供任何时间的泛在访问。我们提出的算法考虑接收信号强度(RSS)、可用网络带宽(B)、货币成本(C)和用户偏好(P)作为垂直切换决策标准。提出的VHDA采用模糊逻辑方法对可用网络的性能进行评价。然后进行切换决策,为移动节点(MNs)选择最合适的网络。仿真结果表明,基于模糊逻辑的VHDA能够做出准确的切换决策,减少不必要的切换,降低呼叫阻塞和掉线的概率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A fuzzy logic based vertical handoff decision algorithm between WWAN and WLAN
Next generation wireless communications will integrate multiple wireless access networks, including Wireless Wide Area Network (WWAN) and Wireless Local Area Network (WLAN). Vertical handoff decision plays an important role in heterogeneous networks. In this paper, we propose a fuzzy logic based vertical handoff decision algorithm (VHDA) to provide ubiquitous access at any time. Our proposed algorithm considers received signal strength (RSS), available network bandwidth (B), monetary cost (C) and user preference (P) as the vertical handoff decision criteria. The proposed VHDA uses the fuzzy logic method to evaluate the performance of the available networks. Then handoff decisions are made to select the most appropriate network for the mobile nodes (MNs). Simulation results show that fuzzy logic based VHDA is able to make accurate handoff decisions, reduce unnecessary handoffs and decrease the probability of call blocking and dropping.
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