能量收集中继安全传输网络的在线功率控制算法  

Online Power Control Algorithm for Secure Relay Transmission Network with Energy Harvesting

作　　者：雷维嘉[1,2] 付安琦 雷宏江 谢显中[4] LEI Weijia;FU Anqi;LEI Hongjiang;XIE Xianzhong(School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;Chongqing Key Laboratory of Mobile Communications Technology,Chongqing 400065,China;Shaanxi Key Laboratory of Information Communication Network and Security,Xi’an University of Posts and Telecommunications,Xi’an 710121,China;School of Optoelectronic Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065 [2]移动通信技术重庆市重点实验室,重庆400065 [3]西安邮电大学陕西省信息通信网络及安全重点实验室,西安710121 [4]重庆邮电大学光电工程学院,重庆400065

出　　处：《电子与信息学报》2021年第5期1306-1314,共9页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(61971080,61471076);重庆市教委科学技术研究重点项目(KJZD-K201800603,KJZD-M201900602);陕西省信息通信网络及安全重点实验室开放课题基金(ICNS201807)。

摘　　要：针对源节点和中继节点均采用收集能量供电的放大转发中继网络,考虑两个目的节点之间信息相互保密的场景,该文提出最大化长期时间平均保密速率的源节点和中继节点发送功率联合优化算法。由于能量到达和信道状态是随机过程,该问题是一个随机优化问题。利用Lyapunov优化框架将电池操作和能量使用约束下的长期优化问题转化为每时隙的“虚队列漂移加惩罚”最小化问题,并求解。仿真结果显示该文提出的算法在长期平均保密速率上相较于对比算法具有显著的优势,同时算法仅依赖于当前的电池状态和信道状态信息做出决策,是一种实用的、低复杂度的算法。For amplify-and-forward relay networks where both the source node and the relay node are powered by the harvested energy and the information for the two destination nodes are required to keep secrecy each other,an algorithm is proposed to maximize the long-term average secrecy rate by jointly optimizing the transmission power of the source node and the relay node.Since the energy arrivals and channel states are stochastic processes,the problem is a stochastic optimization problem.The Lyapunov optimization framework is used to transform the long-term optimization problem into a“virtual queue drift plus penalty”minimization problem per time slot under the constraints of battery operation and energy using.The transformed optimization problem is solved.The simulation results show that the proposed algorithm has significant advantages over the comparison algorithms in the long-term average secrecy rate.Furthermore,the proposed algorithm only depends on the current battery state and channel state to make the decision,which is a practical and low-complexity algorithm.

关 键 词：物理层安全 功率控制 中继网络 能量收集 Lyapunov框架 

分 类 号：TN918[电子电信—通信与信息系统]