基于内容感知的无人机轨迹规划和资源分配联合优化方法

UAV Trajectory Planning and Resource Joint Optimization Method Based on Content-aware

针对未来网络中激增的数据流量以及用户多样化的业务需求,利用无人机来辅助蜂窝网络为用户提供更好的服务。该文提出了基于内容感知的无人机轨迹规划和资源分配联合优化方法,在无人机上缓存热点内容,在满足用户内容需求的条件下,联合优化用户接入以及无人机飞行轨迹来最大化最小用户平均服务速率。由于所建立的优化问题具有非凸性,该文提出了一种块坐标下降的方法将原问题分解为两个子问题,并利用连续凸优化方法对问题进行求解。仿真结果表明,所提方法能够有效提升最小用户平均服务速率,提升网络深度覆盖水平。

In view of the surge in data traffic and the diversified needs of users in the future 6G network,using UAV to assist the cellular network can provide users with better services.This paper proposes a UAV trajectory planning and resource allocation joint optimization method based on content-aware.Hot content is cached on UAV.Under the condition of satisfying the user’s content demand,user association and UAV trajectory are jointly optimized to maximize the minimum average service rate of users.Since the established optimization problem is non-convex,a block coordinate descent method is proposed to decompose the original problem into two sub-problems and the trajectory planning problem is solved by continuous convex optimization method.The simulation results show that the proposed method can effectively improve the minimum user average service rate and the network depth coverage level.