Secure Relay and Jammer Selection for Physical Layer Security
Secure Relay and Jammer Selection for Physical Layer Security
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DOI：
10.1109/lsp.2014.2387860
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发表时间：
2015-01
影响因子：
3.9
通讯作者：
Hui Hui-Hui;A. L. Swindlehurst;Guobing Li;Junli Liang
中科院分区：
文献类型：
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作者：
Hui Hui-Hui;A. L. Swindlehurst;Guobing Li;Junli Liang
在具有多个中间节点和窃听者的无线网络中，研究了用于物理层安全的安全中继和干扰机选择，其中每个中间节点或者作为中继帮助转发消息，或者作为干扰机广播噪声。我们推导出一个封闭形式的表达的秘密中断概率（SOP），我们开发了两个中继和干扰机选择SOP最小化的方法。在这两种方法中，目的地设计并广播选择向量和相应的阈值，以确保每个中间节点知道自己的角色，而中继和干扰机集的知识对所有窃听者保密。仿真结果表明，所提出的方法的SOP是非常接近的，通过一个穷举搜索，并保持选择结果的隐私大大提高了SOP性能。
Secure relay and jammer selection for physical-layer security is studied in a wireless network with multiple intermediate nodes and eavesdroppers, where each intermediate node either helps to forward messages as a relay, or broadcasts noise as a jammer. We derive a closed-form expression for the secrecy outage probability (SOP), and we develop two relay and jammer selection methods for SOP minimization. In both methods a selection vector and a corresponding threshold are designed and broadcast by the destination to ensure each intermediate node knows its own role while knowledge of the relay and jammer set is kept secret from all eavesdroppers. Simulation results show the SOP of the proposed methods are very close to that obtained by an exhaustive search, and that maintaining the privacy of the selection result greatly improves the SOP performance.