Revealing and Optimizing Trade-Offs Between Information Freshness and Energy Consumption in Internet of Things

doi:10.3778/j.issn.1002-8331.2401-0383

Abstract

Abstract: In the context of unmanned aerial vehicle (UAV) assisted data collection for Internet of things sensor node, the freshness of information and UAV energy consumption are fundamentally competing metrics. To elucidate the trade-off between these two metrics, this paper introduces the concept of the Pareto boundary, formulating the problem as a multi-objective mixed integer linear programming problem, the Bender decomposition algorithm is applied to solve this problem. Subsequently, through the joint design of node wake-up/sleep mechanisms and UAV trajectories, the two metrics are collectively optimized, maximizing the reduction of the maximum energy consumption of SN, formulating the design as a mixed-integer non-convex optimization problem, and an iterative algorithm is proposed using sequential convex optimization techniques to find a suboptimal solution for design. Simulation results demonstrate that the proposed method can achieve Pareto optimal solutions between two metrics. Compared to the hover solution, the proposed design optimizes UAV energy consumption and information freshness while significantly saving energy consumption of SN.

Key words: UAV-consumption, information freshness, Pareto optimality, SN-energy consumption, wake and sleep mechanisms

摘要： 无人机辅助物联网传感器节点（sensor nodes，SN）数据采集场景中，信息新鲜度和无人机能耗本质上是相互竞争的指标。为揭示两个指标之间的权衡，引入Pareto边界的概念，将该问题公式化为多目标混合整数线性规划问题，并应用Bender分解算法求解该问题。而后通过节点唤醒与睡眠机制与无人机轨迹的联合设计，共同优化两个指标，并最大限度地减少SN的最大能耗，将该联合设计公式化为混合整数非凸优化问题，通过应用逐次凸优化技术，提出了一种迭代算法来求解。仿真结果表明，所提出的方法能在两个竞争度量之间得出Pareto最优解。与悬停方案相比，所提设计中无人机能耗和信息新鲜度得到优化，同时显著节省了SN的能耗。

关键词: 无人机能耗, 信息新鲜度, Pareto最优, SN能耗, 唤醒与睡眠机制

ZHU Peng, WANG Hai, QING Zhen, JING Lulu, WANG Leping. Revealing and Optimizing Trade-Offs Between Information Freshness and Energy Consumption in Internet of Things[J]. Computer Engineering and Applications, 2024, 60(21): 254-263.

朱鹏, 王海, 秦蓁, 景璐璐, 王乐萍. 物联网中信息新鲜度和能耗的权衡揭示及优化[J]. 计算机工程与应用, 2024, 60(21): 254-263.

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