西安电子科技大学学报 ›› 2025, Vol. 52 ›› Issue (2): 13-24.doi: 10.19665/j.issn1001-2400.20241205

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全双工中继和速率分割协同的安全传输方案

魏明生1(), 端思轶1(), 李世党1,2(), 高全学3(), 李春国2()   

  1. 1.江苏师范大学 物理与电子工程学院,江苏 徐州 221116
    2.东南大学 信息科学与工程学院,江苏 南京 210096
    3.西安电子科技大学 通信工程学院,陕西 西安 710071
  • 收稿日期:2024-07-10 出版日期:2025-04-20 发布日期:2025-01-02
  • 通讯作者: 李世党(1984—),男,讲师,E-mail:shidangli@jsnu.edu.cn
  • 作者简介:魏明生(1976—),男,副教授,E-mail:weims@jsnu.edu.cn;
    端思轶(2000—),女,江苏师范大学硕士研究生,E-mail:2020221336@jsnu.edu.cn;
    高全学(1975—),男,教授,E-mail:qxgao@xidian.edu.cn;
    李春国(1983—),男,教授,E-mail:chunguoli@seu.edu.cn
  • 基金资助:
    国家自然科学基金(62171119);江苏省研究生科研与实践创新计划项目(SJCX23_1378);国家重点研发计划(2017YFF0205500);徐州市重点研发项目(KC20027);徐州市重点研发项目(KC18079);徐州市重点研发项目(KC22083);徐州市重点研发项目(KC23134);教育部春晖计划国际合作项目(202201406);教育部春晖计划国际合作项目(HZKY20220171);江苏省高等学校基础科学(自然科学)研究重大项目(24KJA510004)

Secure transmission scheme for cooperative full-duplex relaying and rate splitting

WEI Mingsheng1(), DUAN Siyi1(), LI Shidang1,2(), GAO Quanxue3(), LI Chunguo2()   

  1. 1. School of Physics and Electrical Engineering,Jiangsu Normal University,Xuzhou 221116,China
    2. School of Information Science and Engineering,Southeast University,Nanjing 210096,China
    3. School of Telecommunications Engineering,Xidian University,Xi’an 710071,China
  • Received:2024-07-10 Online:2025-04-20 Published:2025-01-02

摘要:

针对传统网络框架存在的诸如覆盖范围受限、系统容量偏低等固有缺陷,考虑具有不可信用户中继与速率分割协作通信中的安全问题,构建了远端用户的平均保密率与公共信息可达速率的加权和的最大化问题。首次将速率分割多址技术与协作中继技术相结合,同时考虑了公共消息广播特性可能引发的公共信息泄露风险。由于该问题中存在变量的耦合和非线性约束,导致其非凸特性,无法直接求解,因此考虑基站和中继设备的功率预算的约束下,联合优化预编码矩阵、公共信息分割和设备到设备的发射功率,采用连续凸逼近的方法,引入松弛变量,线性化处理非凸约束,将该非凸问题转换为易求解的凸问题,进而设计了一种全双工协作速率分割的迭代优化算法,避免了时间资源的浪费。仿真结果证明了所提方案的优越性:相比已有半双工速率分割多址方案,所提方案具有更良好的收敛性,硬件配置实时性有相应改善;同时相比不协作速率分割多址方案,可以实现更高的安全传输速率,为远端用户提供切实的安全保障。

关键词: 协作通信, 优化算法, 安全速率, 预编码, 速率分割多址

Abstract:

In order to solve the inherent defects of a traditional network framework such as limited coverage and low system capacity,by considering the security problems of cooperative communication with untrusted user relay and rate segmentation,the weighted sum of the average confidentiality rate of remote users and the maximum reachable rate of public information is constructed.This paper combines Rate-Splitting Multiple Access(RSMA) technology with cooperative relaying technology for the first time,and considers the risk of public information leakage caused by the characteristics of common message broadcasting.Due to the coupling of variables and nonlinear constraints in this problem,it is non-convex and can not be solved directly.Therefore,by considering the constraints of the power budget of the base station and the relay equipment,the precoding matrix,public information segmentation and deal-to-device transmission power are jointly optimized.The Successive Convex Approximation(SCA) method is adopted to introduce slack variables and linearize the non-convex constraints.The non-convex problem is converted into a convex problem that is easy to solve,and an iterative optimization algorithm for full-duplex cooperative rate segmentation is designed so as to avoid the waste of time and resources.Simulation results prove the superiority of the proposed scheme.Compared with the existing half-duplex rate split multiple access scheme,it has a better convergence and improves the real-time hardware configuration.At the same time,compared with the non-cooperative rate split multiple access scheme,it can achieve a higher secure transmission rate and provide practical security for remote users.

Key words: cooperative communication, optimization algorithms, secure rate, precoding matrix, rate splitting multiple access

中图分类号: 

  • TN92