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首页> 外文会议>International ITG Workshop on Smart Antennas >Relay Selection Based on the Secrecy Rate Criterion for Physical-Layer Security in Buffer-Aided Relay Networks
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Relay Selection Based on the Secrecy Rate Criterion for Physical-Layer Security in Buffer-Aided Relay Networks

机译：缓冲辅助中继网络中基于保密速率标准的中继选择，用于物理层安全

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摘要

In this paper, we investigate an opportunistic relay and jammer scheme along with relay selection algorithms based on the secrecy rate criterion in multiple-input multiple-output buffer-aided down link relay networks, which consist of one source, a number of relay nodes, legitimate users and eavesdroppers, with the constraints of physical layer security. The opportunistic relay and jammer scheme is employed to improve the transmission rate and different relay selection policies are performed to achieve better secrecy rate with the consideration of eavesdroppers. Among all the investigated relay selection policies, a relay selection policy which is developed to maximize the secrecy rate based on exhaustive searches outperforms other relay selection policies in terms of secrecy rate. Based on the secrecy rate criterion, we develop a relay selection algorithm without knowledge of the channels of the eavesdroppers. We also devise a greedy search algorithm based on the secrecy rate criterion to reduce the computational complexity of the exhaustive search technique. Simulations show the superiority of the secrecy rate criterion over competing approaches.
机译：在本文中，我们研究了机会输入中继器和干扰器方案，以及基于保密率准则的中继器选择算法，用于多输入多输出缓冲器辅助下行链路中继网络中，该网络由一个源，多个中继节点，具有物理层安全性约束的合法用户和窃听者。采用机会中继和干扰方案来提高传输速率，并且考虑到窃听者，执行了不同的中继选择策略以实现更好的保密率。在所有调查的中继选择策略中，基于保密搜索而开发的用于最大化保密率的中继选择策略在保密率方面优于其他中继选择策略。基于保密率标准，我们在不了解窃听者通道的情况下开发了一种中继选择算法。我们还设计了一种基于保密率准则的贪婪搜索算法，以减少穷举搜索技术的计算复杂性。仿真表明，保密率标准优于竞争方法。

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