面向6G的全双工D2D通信物理层安全策略  

Physical layer security strategy for full-duplex 6G D2D communication

作　　者：马蓓 MA Bei(School of Information,Xi'an University of Finance and Economics,Xi'an 710100,China)

机构地区：[1]西安财经大学信息学院,陕西西安710100

出　　处：《武汉大学学报（工学版）》2023年第2期233-236,共4页Engineering Journal of Wuhan University

基　　金：西安财经学院科学研究项目(编号:18FCZD02)。

摘　　要：针对6G赋能的智能时代下低时延、超高速、万物互联的海量机器类通信要求,基于物理层的安全防范技术已经成为传统信息安全机制的有效补充保障技术。基于多阶迭代干扰对齐(multi-phase iterative interference alignment, MPIIA)算法,利用反馈信道状态信息,提出了一种抵御被动式恶意攻击的物理层安全防范方案。算法依据全双工通信特点,首先,在反向阶段,利用反向信道对接收信号进行线性组合反馈给发送端;其次,在前向阶段,将反馈信号迭代与发送信号进行线性组合形成发送方案;通过设计编码矩阵,实现了全双工的多阶干扰对消,并极大地恶化了恶意用户的性能,从而保障物理层的安全。仿真结果表明,与传统的半双工D2D(device-to-device)通信相比,所提算法可以实现2倍的系统容量,同时保证智能D2D通信网络的最优自由度。6G is envisioned to meet the requirements of massive machine type communications of ultra-low latency, ultra high rates, ubiquitously connected. Recently, it has been demonstrated that the physical layer security technique enables a forceful complement to the traditional information security strategy with cryptology applications. In this paper, based on multi-phase iterative interference alignment(MPIIA) algorithm,a physical layer security defense scheme is proposed to defend against passive malicious attacks by using feedback channel status information. According to the characteristics of full-duplex(FD) communication,in the backward phase,the received signal is fed back to the transmitter by linear combination through the reverse channel firstly. Then, in the forward phase, the feedback signal iteration and the sending signal are linearly combined to form the sending scheme. Additionally, by designing the encoding matrices, the optimal interference cancellation scheme is characterized, the performance of eavesdropper is deteriorated, which ensure the security of physical layer.The simulation results show that compared with the traditional half-duplex D2D wireless networks, the proposed algorithm can achieve twice the system capacity and ensure the optimal degree of freedom of intelligent D2D communication network.

关 键 词：6G网络 全双工 多阶干扰对齐 物理层安全 

分 类 号：TN972[电子电信—信号与信息处理]