RIS辅助的短包通信系统时延与安全性能分析  

Delay and Security Performance Analysis in RIS Assisted Short Packet Communication System

作　　者：韩书君 吕素玉 许晓东 陶小峰 韩伯骁 HAN Shujun;LYU Suyu;XU Xiaodong;TAO Xiaofeng;HAN Boxiao(School of Cyberspace,Beijing University of Posts and Telecommunications,Beijing 100876,China;School of Information and Communication Engineering,Beijing University of Posts and Telecommunications,Beijing 100876,China;Future Mobile Technology Research Institute,China Mobile Research Institute,Beijing 100053,China)

机构地区：[1]北京邮电大学网络空间安全学院,北京100876 [2]北京邮电大学信息与通信工程学院,北京100876 [3]中国移动通信研究院未来移动通信技术研究所,北京100053

出　　处：《北京邮电大学学报》2022年第6期68-74,共7页Journal of Beijing University of Posts and Telecommunications

基　　金：国家重点研发计划项目(2020YFB1806905);中国博士后科学基金项目(2021M690470);北京邮电大学-中国移动研究院联合创新中心项目。

摘　　要：由于限定误差编码条件下的香农定理不再适用于短包通信系统,现有基于香农定理的无线通信系统性能分析结果不能准确描述短包通信系统的性能。对此,提出一种可重构智能反射面(RIS)辅助的短包通信系统,利用有限长编码理论描述其网络性能。基于排队论、有效容量理论和物理层安全理论,分析了RIS辅助的短包通信系统统计时延违反概率和遍历保密传输速率,并得到了闭合表达式。通过蒙特卡洛仿真实验验证了理论分析结果的有效性;通过增加智能反射单元数量,将RIS部署在靠近发送端或接收端的位置,可有效降低短包通信系统统计时延违反概率,提升遍历保密传输速率。Because Shannon’s theorem with condition of limited error coding methods is no longer suitable for short packet communication, the existing performance analysis conclusions based on Shannon’s theorem cannot accurately describe the performance of short packet communication systems. A reconfigurable intelligent surface(RIS) assisted short packet communication system is proposed, and the finite blocklength coding theorem is applied to measure its performances. Based on the queuing theory, effective capacity and physical layer security, the statistical delay violation probability and the ergodic secrecy transmission rate of the RIS-assisted short packet communication system are analyzed and their closed-form expressions are obtained. Monte Carlo simulations are provided to confirm the theoretical analysis results. We obtain that the statistical delay violation probability of short packet communication system is effectively reduced and the ergodic secrecy transmission rate is improved by increasing the number of RIS units and deploying the RIS close to transmitter or receiver.

关 键 词：可重构智能表面 短包通信 统计时延违反概率 遍历保密传输速率 

分 类 号：TN929.5[电子电信—通信与信息系统]