Reliable and Secure Short-Packet Communications in Untrusted Diamond Relay Networks
Reliable and Secure Short-Packet Communications in Untrusted Diamond Relay Networks
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DOI：
10.1109/access.2023.3255881
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发表时间：
2023
期刊：
影响因子：
3.9
通讯作者：
Shen Qian
中科院分区：
文献类型：
--
作者：
Shen Qian
本文研究了具有两个不可信中继（潜在窃听者）的菱形中继网络上的短包通信，目的是同时保证可靠性和安全性。从物理层安全的角度定义了可靠性和保密性兼顾的可靠安全概率（RSP）作为性能指标。提出了一种考虑短分组传输特性的可靠性和安全性分析方法。利用源到中继传输的源信道分离定理和中继到目的地传输的首席执行官（CEO）问题分析，通过分析框架对rsp进行了数值计算。研究发现，即使没有友好干扰信号或人工噪声的支持，源中继传输和中继目的地传输的贡献平衡时，也能达到最佳RSP。
This paper investigates short-packet communications over a diamond relay network with two untrusted relays (potential eavesdroppers) with the purpose of guaranteeing reliability and security simultaneously. As the performance metric, reliable-and-secure probability (RSP), considering both reliability and secrecy, is defined from the perspective of physical layer security. An analytical approach is proposed to investigate reliability and security by taking into account the characteristics of the short-packet transmission. RSPs are numerically obtained via the analytical framework by utilizing the source-channel separation theorem for the source-to-relay transmission and chief executive officer (CEO) problem analyses for the relay-to-destination transmission. It is found that the optimal RSP is achieved when the contributions from the source-relay transmission and the relay-destination transmission are balanced, even without support from a friendly jamming signal or artificial noise.