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首页> 外文期刊>IEEE transactions on wireless communications >Physical-Layer Security in Full-Duplex Multi-Hop Multi-User Wireless Network With Relay Selection
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Physical-Layer Security in Full-Duplex Multi-Hop Multi-User Wireless Network With Relay Selection

机译：具有中继选择功能的全双工多跳多用户无线网络中的物理层安全性

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摘要

This paper investigates the relay selection (RS) problem for multi-hop full-duplex relay networks where multiple source-destination (SD) pairs compete for the same pool of relays, under the attack of multiple eavesdroppers. To enhance the physical-layer security, within a given coherence time, our objective is to jointly assign the available relays at each hop to different SD pairs to maximize the minimum secrecy rate among all pairs. Two RS schemes, optimal RS and suboptimal RS (SRS), are proposed for two-hop networks based on global channel state information (CSI) and only SD pairs CSI, respectively. Since all users can communicate within the same coherence time, our joint RS schemes are important for the user-fairness and ultra-reliable low-latency communications. To evaluate the performance, the exact secrecy outage probability of the SRS scheme is derived under two residual self-interference models. The asymptotic analysis shows that the SRS scheme achieves full diversity. A relay-based jamming scheme is also proposed by using unassigned relays for user communications. Finally, the two-hop RS schemes and the analysis are extended to the general multi-hop network with multiple eavesdroppers. The numerical results reveal interesting fundamental trends where the proposed schemes can significantly enhance the secrecy performance.
机译：本文研究了多跳全双工中继网络的中继选择（RS）问题，在该网络中，多个源-目标（SD）对在多个窃听者的攻击下竞争同一中继池。为了增强物理层的安全性，在给定的相干时间内，我们的目标是将每个跃点上的可用中继共同分配给不同的SD对，以最大程度地提高所有对中的最小保密率。针对两跳网络，分别基于全局信道状态信息（CSI）和仅SD对CSI，提出了两种RS方案，即最优RS和次优RS（SRS）。由于所有用户都可以在相同的相干时间内进行通信，因此我们的联合RS方案对于用户公平性和超可靠的低延迟通信非常重要。为了评估性能，在两个残留的自干扰模型下得出了SRS方案的确切保密中断概率。渐近分析表明，SRS方案实现了完全分集。通过使用未分配的中继器进行用户通信，还提出了基于中继的干扰方案。最后，将两跳RS方案和分析扩展到具有多个窃听者的通用多跳网络。数值结果揭示了有趣的基本趋势，其中所提出的方案可以显着提高保密性能。

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