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This work addresses the key challenges of applying federated learning to large-scale deep neural networks, particularly the issue of client drift due to data heterogeneity across clients and the high costs of communication, computation, and…

Machine Learning · Computer Science 2025-09-08 Jiaojiao Zhang , Yuqi Xu , Kun Yuan

Data heterogeneity across clients is a key challenge in federated learning. Prior works address this by either aligning client and server models or using control variates to correct client model drift. Although these methods achieve fast…

Machine Learning · Computer Science 2023-06-12 Bo Li , Mikkel N. Schmidt , Tommy S. Alstrøm , Sebastian U. Stich

In Federated Learning (FL), a number of clients or devices collaborate to train a model without sharing their data. Models are optimized locally at each client and further communicated to a central hub for aggregation. While FL is an…

Machine Learning · Computer Science 2023-07-25 Farshid Varno , Marzie Saghayi , Laya Rafiee Sevyeri , Sharut Gupta , Stan Matwin , Mohammad Havaei

Federated learning has been identified as an efficient decentralized training paradigm for scaling the machine learning model training on a large number of devices while guaranteeing the data privacy of the trainers. FedAvg has become a…

Machine Learning · Computer Science 2024-04-23 Haotian Xu , Zhaorui Zhang , Sheng Di , Benben Liu , Khalid Ayed Alharthi , Jiannong Cao

Federated Learning is a distributed machine learning approach which enables model training without data sharing. In this paper, we propose a new federated learning algorithm, Federated Averaging with Client-level Momentum (FedCM), to tackle…

Machine Learning · Computer Science 2021-06-22 Jing Xu , Sen Wang , Liwei Wang , Andrew Chi-Chih Yao

Traditional Federated Learning (FL) faces significant challenges in terms of efficiency and accuracy, particularly in heterogeneous environments where clients employ diverse model architectures and have varying computational resources. Such…

Machine Learning · Computer Science 2025-05-13 Jiacheng Wang , Hongtao Lv , Lei Liu

Heterogeneity across clients in federated learning (FL) usually hinders the optimization convergence and generalization performance when the aggregation of clients' knowledge occurs in the gradient space. For example, clients may differ in…

Machine Learning · Computer Science 2022-03-08 Yue Tan , Guodong Long , Lu Liu , Tianyi Zhou , Qinghua Lu , Jing Jiang , Chengqi Zhang

Federated Learning (FL) is a distributed machine learning approach to learn models on decentralized heterogeneous data, without the need for clients to share their data. Many existing FL approaches assume that all clients have equal…

Machine Learning · Computer Science 2023-10-10 Aditya Narayan Ravi , Ilan Shomorony

Federated Learning (FL) enables collaborative model training across distributed clients while preserving data privacy, yet faces challenges in non-independent and identically distributed (non-IID) settings due to client drift, which impairs…

Machine Learning · Computer Science 2026-02-12 Mohammad Partohaghighi , Roummel Marcia , Bruce J. West , YangQuan Chen

We propose \texttt{FedGLOMO}, a novel federated learning (FL) algorithm with an iteration complexity of $\mathcal{O}(\epsilon^{-1.5})$ to converge to an $\epsilon$-stationary point (i.e., $\mathbb{E}[\|\nabla f(\bm{x})\|^2] \leq \epsilon$)…

Machine Learning · Statistics 2021-10-26 Rudrajit Das , Anish Acharya , Abolfazl Hashemi , Sujay Sanghavi , Inderjit S. Dhillon , Ufuk Topcu

Federated learning on heterogeneous (non-IID) client data experiences slow convergence due to client drift. To address this challenge, we propose Kuramoto-FedAvg, a federated optimization algorithm that reframes the weight aggregation step…

Machine Learning · Computer Science 2025-05-27 Aggrey Muhebwa , Khotso Selialia , Fatima Anwar , Khalid K. Osman

Federated learning (FL) is a distributed machine learning paradigm where multiple clients conduct local training based on their private data, then the updated models are sent to a central server for global aggregation. The practical…

Machine Learning · Computer Science 2025-04-03 Harsh Vardhan , Xiaofan Yu , Tajana Rosing , Arya Mazumdar

Most existing federated learning algorithms are based on the vanilla FedAvg scheme. However, with the increase of data complexity and the number of model parameters, the amount of communication traffic and the number of iteration rounds for…

Machine Learning · Computer Science 2024-01-30 Xiaolin Zheng , Senci Ying , Fei Zheng , Jianwei Yin , Longfei Zheng , Chaochao Chen , Fengqin Dong

Federated Learning (FL) has emerged as a powerful paradigm for decentralized machine learning, enabling collaborative model training across diverse clients without sharing raw data. However, traditional FL approaches often face limitations…

Machine Learning · Computer Science 2025-10-22 Ali Forootani , Raffaele Iervolino

Federated learning (FL) is an emerging distributed machine learning paradigm that enables collaborative training of machine learning models over decentralized devices without exposing their local data. One of the major challenges in FL is…

Distributed, Parallel, and Cluster Computing · Computer Science 2024-07-11 Md Sirajul Islam , Simin Javaherian , Fei Xu , Xu Yuan , Li Chen , Nian-Feng Tzeng

Federated Learning (FL) algorithms commonly sample a random subset of clients to address the straggler issue and improve communication efficiency. While recent works have proposed various client sampling methods, they have limitations in…

Machine Learning · Computer Science 2024-05-15 Jiaxiang Geng , Yanzhao Hou , Xiaofeng Tao , Juncheng Wang , Bing Luo

Federated learning (FL) enables distributed optimization of machine learning models while protecting privacy by independently training local models on each client and then aggregating parameters on a central server, thereby producing an…

Machine Learning · Computer Science 2022-03-08 Chencheng Xu , Zhiwei Hong , Minlie Huang , Tao Jiang

Synchronous federated learning scales poorly due to the straggler effect. Asynchronous algorithms increase the update throughput by processing updates upon arrival, but they introduce two fundamental challenges: gradient staleness, which…

Machine Learning · Computer Science 2026-03-30 Abdelkrim Alahyane , Céline Comte , Matthieu Jonckheere

Federated learning harnesses the power of distributed optimization to train a unified machine learning model across separate clients. However, heterogeneous data distributions and computational workloads can lead to inconsistent updates and…

Machine Learning · Computer Science 2024-10-15 Aayushya Agarwal , Gauri Joshi , Larry Pileggi

In Federated Learning (FL), the distributed nature and heterogeneity of client data present both opportunities and challenges. While collaboration among clients can significantly enhance the learning process, not all collaborations are…

Machine Learning · Computer Science 2024-07-18 Nazarii Tupitsa , Samuel Horváth , Martin Takáč , Eduard Gorbunov