Li Jianye, Dong Yunquan, Pan Chengsheng
School of Electronic and Information Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China.
School of Electronic and Information Engineering, Anhui Jianzhu University, Hefei 230009, China.
Entropy (Basel). 2023 Jul 11;25(7):1040. doi: 10.3390/e25071040.
In this paper, we consider information transmission over a three-node physical layer security system. Based on the imperfect estimations of the main channel and the eavesdropping channel, we propose reducing the outage probability and interception probability by hindering transmissions in cases where the main channel is too strong or too weak, which is referred to as an Specifically, Alice gives up its chance to transmit a packet if the estimated power gain of the main channel is smaller than a certain threshold so that possible outages can be avoided; Alice also becomes silent if the estimated power gain is larger than another threshold so that possible interceptions at Eve can be avoided. We also consider the timeliness of the network in terms of the violation probability of the peak age of information (PAoI). We present the outage probability, interception probability, and PAoI violation probability explicitly; we also investigate the trade-off among these probabilities, considering their weight sum. Our numerical and Monte Carlo results show that by using the SNR-gated transmission control, both the outage probability and the interception probability are reduced.
在本文中，我们考虑三节点物理层安全系统中的信息传输。基于对主信道和窃听信道的不完美估计，我们提出通过在主信道过强或过弱的情况下阻碍传输来降低中断概率和拦截概率，这被称为一种[具体方法未提及]。具体而言，如果主信道的估计功率增益小于某个阈值，爱丽丝放弃传输数据包的机会，从而避免可能的中断；如果估计功率增益大于另一个阈值，爱丽丝也保持沉默，从而避免在伊芙处可能的拦截。我们还从信息峰值年龄（PAoI）的违反概率方面考虑网络的及时性。我们明确给出了中断概率、拦截概率和PAoI违反概率；我们还考虑它们的加权和，研究这些概率之间的权衡。我们的数值和蒙特卡罗结果表明，通过使用信噪比门控传输控制，中断概率和拦截概率都降低了。
