计算机应用研究2024，Vol.41Issue(4)：1143-1149,7.DOI:10.19734/j.issn.1001-3695.2023.08.0361
移动边缘计算中的无人机三维部署和内容缓存优化方法
UAV 3D deployment and content caching optimization for mobile edge computing
摘要
Abstract
With the explosive growth of mobile data traffic in wireless networks,cache-enabled unmanned aerial vehicles(UA-Vs)are being used in mobile computing to serve as edge servers to provide on-demand services to users in the network.To bring better quality of experience to users while satisfying other resource constraints,it jointly optimized UAVs deployment,cache placement and user association to minimize content access latency for all users and provided users with content caching services of varying quality.This paper proposed a joint optimization algorithm based on alternating optimization for the scenario where multi-ple UAVs and ground base stations collaborate to provide caching services.The algorithm achieved a sub-optimal solution with a convergence guarantee by iteratively solving the three sub-problems obtained from the decomposition of the objective problem.Firstly,a successive convex approximation-based algorithm solved the UAV deployment sub-problem.Secondly,it used a greedy-based algorithm to solve the content caching sub-problem.Then it used a successive convex approximation algorithm based on the penalty function to solve the user access sub-problem.Finally,it repeated the above procedure to obtain a sub-optimal solution to the target problem.Several simulation experiments verified the effectiveness and feasibility of the proposed algorithm.The simu-lation results show that the proposed joint optimization algorithm performs better regarding average content access latency and cache hit ratio than the benchmark algorithm.关键词
移动边缘计算/无人机三维部署/内容缓存/用户关联/凸优化Key words
mobile edge computing/UAV 3D deployment/content caching/user access/convex optimization分类
信息技术与安全科学引用本文复制引用
唐焕博,陈星,张建山..移动边缘计算中的无人机三维部署和内容缓存优化方法[J].计算机应用研究,2024,41(4):1143-1149,7.基金项目
国家自然科学基金资助项目(62072108) （62072108）
福建省自然科学基金杰青项目(2020J06014) （2020J06014）
中央引导地方科技发展资金资助项目(2022L3004) （2022L3004）
福厦泉国家自主创新示范区协同创新平台项目(2022FX5) （2022FX5）
福建省科技经济融合服务平台项目(2023XRH001) （2023XRH001）
