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Federated Learning (FL) is a decentralized learning paradigm, in which multiple clients collaboratively train deep learning models without centralizing their local data, and hence preserve data privacy. Real-world applications usually…

Machine Learning · Computer Science 2023-08-23 Haokun Chen , Ahmed Frikha , Denis Krompass , Jindong Gu , Volker Tresp

Federated Learning (FL) has shown great potential as a privacy-preserving solution to learning from decentralized data that are only accessible to end devices (i.e., clients). In many scenarios, however, a large proportion of the clients…

Machine Learning · Computer Science 2022-01-31 Wentai Wu , Ligang He , Weiwei Lin , Carsten Maple

Federated learning enables a large amount of edge computing devices to jointly learn a model without data sharing. As a leading algorithm in this setting, Federated Averaging (\texttt{FedAvg}) runs Stochastic Gradient Descent (SGD) in…

Machine Learning · Statistics 2020-06-26 Xiang Li , Kaixuan Huang , Wenhao Yang , Shusen Wang , Zhihua Zhang

Recently, lots of algorithms have been proposed for learning a fair classifier from decentralized data. However, many theoretical and algorithmic questions remain open. First, is federated learning necessary, i.e., can we simply train…

Machine Learning · Computer Science 2022-12-08 Yuchen Zeng , Hongxu Chen , Kangwook Lee

Federated Learning (FL) is a distributed machine learning paradigm that allows clients to train models on their data while preserving their privacy. FL algorithms, such as Federated Averaging (FedAvg) and its variants, have been shown to…

Machine Learning · Computer Science 2024-03-05 Changxin Xu , Yuxin Qiao , Zhanxin Zhou , Fanghao Ni , Jize Xiong

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

Recently, federated learning has raised increasing interest in the medical image analysis field due to its ability to aggregate multi-center data with privacy-preserving properties. A large amount of federated training schemes have been…

Computer Vision and Pattern Recognition · Computer Science 2024-10-24 Matthis Manthe , Stefan Duffner , Carole Lartizien

Federated learning (FL) is a distributed machine learning architecture that leverages a large number of workers to jointly learn a model with decentralized data. FL has received increasing attention in recent years thanks to its data…

Machine Learning · Computer Science 2021-05-05 Haibo Yang , Minghong Fang , Jia Liu

Federated Averaging (FedAvg) is known to experience convergence issues when encountering significant clients system heterogeneity and data heterogeneity. Server momentum has been proposed as an effective mitigation. However, existing server…

Machine Learning · Computer Science 2023-12-21 Jianhui Sun , Xidong Wu , Heng Huang , Aidong Zhang

Providing privacy protection has been one of the primary motivations of Federated Learning (FL). Recently, there has been a line of work on incorporating the formal privacy notion of differential privacy with FL. To guarantee the…

Machine Learning · Computer Science 2021-06-28 Xinwei Zhang , Xiangyi Chen , Mingyi Hong , Zhiwei Steven Wu , Jinfeng Yi

We study a hierarchical federated learning (FL) problem, where clients cooperatively seek to select among multiple optimal solutions of a primary distributed learning problem, a solution that minimizes a secondary loss function. This…

Optimization and Control · Mathematics 2026-05-26 Mohammadjavad Ebrahimi , Yuyang Qiu , Shisheng Cui , Farzad Yousefian

The performance of Federated Learning (FL) hinges on the effectiveness of utilizing knowledge from distributed datasets. Traditional FL methods adopt an aggregate-then-adapt framework, where clients update local models based on a global…

Computer Vision and Pattern Recognition · Computer Science 2024-05-01 Yuan Wang , Huazhu Fu , Renuga Kanagavelu , Qingsong Wei , Yong Liu , Rick Siow Mong Goh

Federated learning methods enable model training across distributed data sources without data leaving their original locations and have gained increasing interest in various fields. However, existing approaches are limited, excluding many…

Machine Learning · Statistics 2023-07-10 Conor Hassan , Robert Salomone , Kerrie Mengersen

Federated learning is a distributed framework according to which a model is trained over a set of devices, while keeping data localized. This framework faces several systems-oriented challenges which include (i) communication bottleneck…

Machine Learning · Computer Science 2020-06-09 Amirhossein Reisizadeh , Aryan Mokhtari , Hamed Hassani , Ali Jadbabaie , Ramtin Pedarsani

In federated optimization, heterogeneity in the clients' local datasets and computation speeds results in large variations in the number of local updates performed by each client in each communication round. Naive weighted aggregation of…

Machine Learning · Computer Science 2020-07-16 Jianyu Wang , Qinghua Liu , Hao Liang , Gauri Joshi , H. Vincent Poor

While federated learning has shown strong results in optimizing a machine learning model without direct access to the original data, its performance may be hindered by intermittent client availability which slows down the convergence and…

Machine Learning · Computer Science 2022-12-08 Zheng Wang , Xiaoliang Fan , Jianzhong Qi , Haibing Jin , Peizhen Yang , Siqi Shen , Cheng Wang

In Federated Learning (FL), the clients learn a single global model (FedAvg) through a central aggregator. In this setting, the non-IID distribution of the data across clients restricts the global FL model from delivering good performance…

Machine Learning · Computer Science 2021-07-29 Siddharth Divi , Yi-Shan Lin , Habiba Farrukh , Z. Berkay Celik

Federated Learning (FL) is a distributed machine learning framework to alleviate the data silos, where decentralized clients collaboratively learn a global model without sharing their private data. However, the clients' Non-Independent and…

Machine Learning · Computer Science 2024-09-19 Ping Luo , Jieren Cheng , Zhenhao Liu , N. Xiong , Jie Wu

Federated learning has emerged as a new paradigm of collaborative machine learning; however, it has also faced several challenges such as non-independent and identically distributed(IID) data and high communication cost. To this end, we…

Machine Learning · Computer Science 2020-12-10 Jin-woo Lee , Jaehoon Oh , Yooju Shin , Jae-Gil Lee , Se-Young Yoon

In this paper, we present a novel analysis of \FedAvg with constant step size, relying on the Markov property of the underlying process. We demonstrate that the global iterates of the algorithm converge to a stationary distribution and…

Machine Learning · Statistics 2025-12-22 Paul Mangold , Alain Durmus , Aymeric Dieuleveut , Sergey Samsonov , Eric Moulines