面向多无人机携能网络的轨迹与资源规划算法  

Trajectory and resource allocation for multi-UAV enabled swipt systems

作　　者：田霖[1] 苏智杰 冯婉媚 陈真 唐杰 周恩丞 TIAN Lin;SU Zhijie;FENG Wanmei;CHEN Zhen;TANG Jie;ZHOU Encheng(Guangzhou Bureau,CSG EHV Power Transmission Company,Guangzhou 510405,China;School of Electronics and Information Engineering,South China University of Technology,Guangzhou 510641,China;School of Economics and Management,University of Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]中国南方电网有限责任公司超高压输电公司广州局,广东广州510405 [2]华南理工大学电子与信息学院,广东广州510641 [3]中国科学院大学经济与管理学院,北京100190

出　　处：《西安电子科技大学学报》2021年第6期115-122,共8页Journal of Xidian University

基　　金：国家自然科学基金(61971194)。

摘　　要：无人机无线携能通信技术可以实现无线信息与能量同时传输,为能量及频谱资源匮乏地区中的节点提供持续的能量来源,以解决物联网节点能量受限问题。而多无人机协同工作更能提高整体工作效率以及传输性能,因此,针对无人机无线携能通信网络,构建了一种多无人机的飞行轨迹规划,能量和信号发射功率分配以及用户调度的联合优化方案。该方案在满足用户最低能量采集约束下最大化最小用户可达速率。由于优化变量间的耦合性以及约束条件的非凸性,所建立的优化问题难以直接求解。因此,提出了一种基于块坐标下降法和连续凸优化技术的优化算法,通过不断迭代求解的方式依次优化无人机的轨迹、功率分配及用户调度,以获得高效的次优解。此外,对于无人机轨迹规划及功率分配中的非凸约束条件,采用连续凸优化算法,并通过一阶泰勒展开作为优化问题及约束的上界或下界,将原有的非凸问题转化为凸问题以进行求解。仿真结果表明,提出的算法收敛性良好,多无人机分布均匀,并可有效提高用户的可达速率。This paper considers a multi-unmanned aerial vehicles(UAVs)enabled simultaneous wireless information and power transfer(SWIPT)system,where a UAV acts as a flying base station(BS)and delivers information and energy to users located in rural and geographically constrained areas.We aim to maximize the minimum achievable rate of users by optimizing the user association,UAV trajectory and power allocation subject to the minimum energy storage capacity requirement.However,this problem is a mixed-integer non-convex optimization problem,and cannot be solved directly.To tackle this problem,we propose an iterative algorithm based on the block coordinate descent,where the user association,UAV trajectory and transmit power are alternately optimized.Especially,the successive convex approximation(SCA)technique is applied to transform the non-convex constraints into convex functions.Simulation results are provided to demonstrate the convergence behavior and the great performance of the proposed algorithm in terms of the minimum achievable rate of all users in multi-UAV enabled SWIPT networks.

关 键 词：无线携能通信 无人机通信 轨迹规划 资源分配 

分 类 号：TN929.5[电子电信—通信与信息系统]