移动通信2025，Vol.49Issue(11)：89-96,8.DOI:10.3969/j.issn.1006-1010.20250925-0002
流态可重构智能表面赋能的物理层安全通信
Fluid Reconfigurable Intelligent Surface-Enabled Physical Layer Security Communication
摘要
Abstract
Given that research on fluid reconfigurable intelligent surfaces(FRIS)for enhancing secure communication is still in its infancy,this paper introduces FRIS into physical layer security(PLS)communication systems for the first time,proposing an associated transmission scheme.First,a PLS transmission system model is constructed based on the considered communication scenario,and an analytical approximate expression for the secure rate is derived under practical constraints.Then,to characterize the potential of FRIS in enhancing the security performance of the system,an optimization model is established with the goal of maximizing the legitimate user's secure rate.The joint design of discrete phase shifts and unit activation positions is carried out under the constant modulus constraint.Given the non-convexity of both the objective function and constraints,an iterative algorithm based on cross-entropy optimization is further proposed to effectively solve the problem.Numerical simulation results show that,compared to traditional RIS-assisted PLS schemes,FRIS significantly improves the system's security performance.Additionally,the proposed algorithm is validated in terms of convergence and optimization capability.关键词
流态可重构智能表面/物理层安全/RISKey words
fluid reconfigurable intelligent surfaces(FRIS)/physical layer security(PLS)/RIS分类
信息技术与安全科学引用本文复制引用
肖涵,胡晓燕,王文杰..流态可重构智能表面赋能的物理层安全通信[J].移动通信,2025,49(11):89-96,8.基金项目
国家自然科学基金项目"RIS赋能的边缘计算资源协同管理优化理论与关键技术研究""频率分集RIS距离-角度耦合方向图设计理论与传输技术研究"(62201449,62471380) （62201449,62471380）
