arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2102.12915cs.NIeess.SP
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在专用和支持缓存的UAV网络中提供新鲜、公平和节能的内容

Fresh, Fair and Energy-Efficient Content Provision in a Private and Cache-Enabled UAV Network

Peng Yang, Kun Guo, Xing Xi, Tony Q. S. Quek, Xianbin Cao, Chenxi Liu

摘要:

在本文中,我们研究了一个私人和缓存启用无人机(UAV)网络的内容提供。为了向地面用户提供新鲜,公平和节能的内容文件,我们制定了联合无人机缓存,无人机轨迹和无人机发射功率优化问题。该问题是一个带混合整数非凸约束的序贯决策问题,直接求解是困难的。为此,我们提出了一种新的算法的基础上的子问题分解和凸逼近技术。特别是,我们首先提出了分解的顺序决策问题,通过李雅普诺夫技术的多个重复优化子问题。接下来,一个迭代优化方案,结合逐次凸逼近(SCA)技术,探讨解决具有挑战性的混合整数非凸子问题。分析了算法的收敛性和计算复杂性,并推导了用于估计内容新鲜度的信息峰值年龄(PAoI)的理论值。仿真结果表明,该算法可以实现接近理论值的PAoI,比基准算法分别高出22.11%和70.51%的能量效率和公平性。

英文摘要:

In this paper, we investigate a private and cache-enabled unmanned aerial vehicle (UAV) network for content provision. Aiming at delivering fresh, fair, and energy-efficient content files to terrestrial users, we formulate a joint UAV caching, UAV trajectory, and UAV transmit power optimization problem. This problem is confirmed to be a sequential decision problem with mixed-integer non-convex constraints, which is intractable directly. To this end, we propose a novel algorithm based on the techniques of subproblem decomposition and convex approximation. Particularly, we first propose to decompose the sequential decision problem into multiple repeated optimization subproblems via a Lyapunov technique. Next, an iterative optimization scheme incorporating a successive convex approximation (SCA) technique is explored to tackle the challenging mixed-integer non-convex subproblems. Besides, we analyze the convergence and computational complexity of the proposed algorithm and derive the theoretical value of the expected peak age of information (PAoI) to estimate the content freshness. Simulation results demonstrate that the proposed algorithm can achieve the expected PAoI close to the theoretical value and is more 22.11% and 70.51% energy-efficient and fairer than benchmark algorithms.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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