National Mobile Communication Research Lab, School of Information Science and Engineering, Southeast University, Nanjing, China.
PLoS One. 2018 Jul 5;13(7):e0199546. doi: 10.1371/journal.pone.0199546. eCollection 2018.
Cooperative spectrum sensing (CSS) is envisaged as a powerful approach to improve the utilization of scarce radio spectrum resources, but it is threatened by Byzantine attack. Byzantine attack has been becoming a popular research topic in both academia and industry due to the demanding requirements of security. Extensive research mainly aims at mitigating the negative effect of Byzantine attack on CSS, but with some strong assumptions, such as attackers are in minority or trusted node(s) exist for data fusion, while paying little attention to a mobile scenario. This paper focuses on the issue of designing a general and reliable reference for CSS in a mobile network. Instead of the previously simplified attack, we develop a generic Byzantine attack model from sophisticated behaviors to conduct various attack strategies and derive the condition of which Byzantine attack makes the fusion center (FC) blind. Specifically, we propose a robust sequential CSS (SCSS) against dynamic Byzantine attack. Our proposed method solves the unreliability of the FC by means of delivery-based assessment to check consistency of individual sensing report, and innovatively reuses the sensing information from Byzantines via a novel weight allocation mechanism. Furthermore, trust value (TrV) ranking is exploited to proceed with a sequential test which generates a more accurate decision about the presence of phenomenon with fewer samples. Lastly, we carry out simulations on comparison of existing data fusion technologies and SCSS under dynamic Byzantine attack, and results verify the theoretical analysis and effectiveness of our proposed approach. We also conduct numerical analyses to demonstrate explicit impacts of secondary user (SU) density and mobility on the performance of SCSS.
协作频谱感知 (CSS) 被视为提高稀缺无线电频谱资源利用率的一种强大方法，但它受到拜占庭攻击的威胁。由于安全要求很高，拜占庭攻击已成为学术界和工业界的热门研究课题。广泛的研究主要旨在减轻拜占庭攻击对 CSS 的负面影响，但存在一些强假设，例如攻击者占少数或存在受信任的节点 (s) 进行数据融合，而对移动场景关注较少。本文专注于设计移动网络中 CSS 的通用可靠参考的问题。我们没有采用以前简化的攻击，而是从复杂的行为中开发了一个通用的拜占庭攻击模型，以进行各种攻击策略，并得出拜占庭攻击使融合中心 (FC) 失明的条件。具体来说，我们提出了一种针对动态拜占庭攻击的稳健顺序 CSS (SCSS)。我们提出的方法通过基于交付的评估来解决 FC 的不可靠性，以检查单个感测报告的一致性，并通过新颖的权重分配机制创新性地重用拜占庭的感测信息。此外，利用信任值 (TrV) 排名进行顺序测试，从而使用较少的样本更准确地判断现象的存在。最后，我们对现有数据融合技术和 SCSS 在动态拜占庭攻击下进行了仿真比较，结果验证了我们提出方法的理论分析和有效性。我们还进行了数值分析，以证明次要用户 (SU) 密度和移动性对 SCSS 性能的明确影响。
