Attack-tolerant distributed sensing for dynamic spectrum access networks

Alexander W. Min, K. Shin, Xin Hu
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引用次数: 81

Abstract

Accurate sensing of the spectrum condition is of crucial importance to the mitigation of the spectrum scarcity problem in dynamic spectrum access (DSA) networks. Specifically, distributed sensing has been recognized as a viable means to enhance the incumbent signal detection by exploiting the diversity of sensors. However, it is challenging to make such distributed sensing secure due mainly to the unique features of DSA networks—openness of a low-layer protocol stack in SDR devices and non-existence of communications between primary and secondary devices. To address this challenge, we propose attack-tolerant distributed sensing protocol (ADSP), under which sensors in close proximity are grouped into a cluster, and sensors in a cluster cooperatively safeguard distributed sensing. The heart of ADSP is a novel shadow fading correlation-based filter tailored to anomaly detection, by which the fusion center prefilters abnormal sensor reports via cross-validation. By realizing this correlation filter, ADSP minimizes the impact of an attack on the performance of distributed sensing, while incurring minimal processing and communications overheads. The efficacy of our scheme is validated on a realistic two-dimensional shadow-fading field, which accurately approximates real-world shadowing environments. Our extensive simulation-based evaluation shows that ADSP significantly reduces the impact of attacks on incumbent detection performance.
动态频谱接入网络的容错分布式感知
在动态频谱接入(DSA)网络中,准确感知频谱状态对于缓解频谱稀缺问题至关重要。具体而言,分布式传感已被认为是利用传感器的多样性来增强现有信号检测的可行手段。然而,由于DSA网络的独特特性——SDR设备中底层协议栈的开放性以及主设备和从设备之间不存在通信,使得这种分布式感知的安全性具有挑战性。为了解决这一挑战,我们提出了容错分布式感知协议(ADSP),在该协议下,距离较近的传感器被分组成一个集群,集群中的传感器协同保护分布式感知。ADSP的核心是为异常检测量身定制的基于阴影衰落相关的新型滤波器,融合中心通过交叉验证对异常传感器报告进行预滤波。通过实现这种相关滤波器,ADSP将攻击对分布式传感性能的影响降至最低,同时将处理和通信开销降至最低。在一个真实的二维阴影消退场上验证了该方案的有效性,该方案准确地逼近了现实世界的阴影环境。我们广泛的基于仿真的评估表明,ADSP显著降低了攻击对在位检测性能的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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