Heterogeneous Computation and Resource Allocation for Wireless Powered Federated Edge Learning Systems

计算机科学 资源配置 副载波 计算卸载 分布式计算 边缘计算 边缘设备 最优化问题 移动边缘计算 GSM演进的增强数据速率 无线 计算机工程 计算机网络 正交频分复用 人工智能 算法 云计算 频道(广播) 操作系统 电信
作者
Jie Feng,Wenjing Zhang,Qingqi Pei,Jinsong Wu,Xiaodong Lin
出处
期刊:IEEE Transactions on Communications [Institute of Electrical and Electronics Engineers]
卷期号:70 (5): 3220-3233 被引量:82
标识
DOI:10.1109/tcomm.2022.3163439
摘要

Federated learning (FL) is a popular edge learning approach that utilizes local data and computing resources of network edge devices to train machine learning (ML) models while preserving users’ privacy. Nevertheless, performing efficient learning tasks on the devices and achieving longer battery life are primary challenges faced by federated learning. In this paper, we are the first to study the application of heterogeneous computing (HC) and wireless power transfer (WPT) to federated learning to address these challenges. Especially, we propose a heterogeneous computation and resource allocation framework based on a heterogeneous mobile architecture to achieve effective implementation of FL. To minimize the energy consumption of smart devices and maximize their harvesting energy simultaneously, we formulate an optimization problem featuring multidimensional control, which jointly considers time splitting for WPT, dataset size allocation, transmit power allocation and subcarrier assignment during communications, and processor frequency of processing units (central processing unit (CPU) and graphics processing unit (GPU)). However, the major obstacle is how to design a proper algorithm to solve this optimization problem efficiently. For this purpose, we decouple the optimization variables so as to achieve high efficiency in deriving its solution. Particularly, we first compute the optimal processor frequency and dataset size allocation via employing the Lagrangian dual method, followed by finding the closed-form solution to the optimal time splitting allocation, and finally attain the optimal subcarrier assignment as well as transmit power for transmissions through an iteration algorithm. To evaluate the performance of our proposed scheme, we set up four baseline schemes as comparison, and simulation results show that the proposed scheme converges quite fast and better enhance the energy efficiency of the wireless powered FL system compared with the baseline schemes.
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