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Federated learning (FL) offers a solution to train a global machine learning model while still maintaining data privacy, without needing access to data stored locally at the clients. However, FL suffers performance degradation when client…

Machine Learning · Computer Science 2021-08-13 Zihan Chen , Kai Fong Ernest Chong , Tony Q. S. Quek

Federated learning is a framework for distributed optimization that places emphasis on communication efficiency. In particular, it follows a client-server broadcast model and is particularly appealing because of its ability to accommodate…

Machine Learning · Computer Science 2022-03-30 Han Wang , Siddartha Marella , James Anderson

This work tackles the challenges of data heterogeneity and communication limitations in decentralized federated learning. We focus on creating a collaboration graph that guides each client in selecting suitable collaborators for training…

Machine Learning · Computer Science 2024-06-11 Salma Kharrat , Marco Canini , Samuel Horvath

Horizontal Federated learning (FL) handles multi-client data that share the same set of features, and vertical FL trains a better predictor that combine all the features from different clients. This paper targets solving vertical FL in an…

Machine Learning · Computer Science 2021-02-02 Tianyi Chen , Xiao Jin , Yuejiao Sun , Wotao Yin

We propose a robust aggregation method for model parameters in federated learning (FL) under noisy communications. FL is a distributed machine learning paradigm in which a central server aggregates local model parameters from multiple…

Machine Learning · Computer Science 2025-05-20 Tsutahiro Fukuhara , Junya Hara , Hiroshi Higashi , Yuichi Tanaka

Clustered Federated Multitask Learning (CFL) was introduced as an efficient scheme to obtain reliable specialized models when data is imbalanced and distributed in a non-i.i.d. (non-independent and identically distributed) fashion amongst…

Distributed, Parallel, and Cluster Computing · Computer Science 2021-08-20 Abdullatif Albaseer , Mohamed Abdallah , Ala Al-Fuqaha , Aiman Erbad

Federated learning (FL) aims to train machine learning (ML) models collaboratively using decentralized data, bypassing the need for centralized data aggregation. Standard FL models often assume that all data come from the same unknown…

Machine Learning · Computer Science 2025-03-25 Wen Bai , Yi Wong , Xiao Qiao , Chin Pang Ho

As a distributed machine learning technique, federated learning (FL) requires clients to collaboratively train a shared model with an edge server without leaking their local data. However, the heterogeneous data distribution among clients…

Machine Learning · Computer Science 2023-07-21 Yu Qiao , Huy Q. Le , Choong Seon Hong

Federated learning is a privacy-focused approach towards machine learning where models are trained on client devices with locally available data and aggregated at a central server. However, the dependence on a single central server is…

Machine Learning · Computer Science 2026-01-06 Shamik Bhattacharyya , Rachel Kalpana Kalaimani

Heterogeneity in federated learning (FL) is a critical and challenging aspect that significantly impacts model performance and convergence. In this paper, we propose a novel framework by formulating heterogeneous FL as a hierarchical…

Optimization and Control · Mathematics 2025-09-11 Yuyang Qiu , Kibaek Kim , Farzad Yousefian

Federated learning (FL) is an emerging distributed machine learning paradigm enabling collaborative model training on decentralized devices without exposing their local data. A key challenge in FL is the uneven data distribution across…

Distributed, Parallel, and Cluster Computing · Computer Science 2024-03-08 Md Sirajul Islam , Simin Javaherian , Fei Xu , Xu Yuan , Li Chen , Nian-Feng Tzeng

Federated learning (FL) has emerged as a powerful approach to safeguard data privacy by training models across distributed edge devices without centralizing local data. Despite advancements in homogeneous data scenarios, maintaining…

Computer Vision and Pattern Recognition · Computer Science 2024-11-26 Yuting Ma , Shengeng Tang , Xiaohua Xu , Lechao Cheng

Federated learning (FL) is a recently proposed distributed machine learning paradigm dealing with distributed and private data sets. Based on the data partition pattern, FL is often categorized into horizontal, vertical, and hybrid…

Machine Learning · Computer Science 2021-02-19 Xinwei Zhang , Wotao Yin , Mingyi Hong , Tianyi Chen

Federated Learning (FL) enables distributed learning across multiple clients without sharing raw data. When statistical heterogeneity across clients is severe, Clustered Federated Learning (CFL) can improve performance by grouping similar…

Machine Learning · Computer Science 2026-01-15 Sota Sugawara , Yuji Kawamata , Akihiro Toyoda , Tomoru Nakayama , Yukihiko Okada

Federated Learning (FL) has been becoming a popular interdisciplinary research area in both applied mathematics and information sciences. Mathematically, FL aims to collaboratively optimize aggregate objective functions over distributed…

Machine Learning · Computer Science 2024-12-03 Shusen Yang , Fangyuan Zhao , Zihao Zhou , Liang Shi , Xuebin Ren , Zongben Xu

Federated learning (FL) has emerged as a transformative training paradigm, particularly invaluable in privacy-sensitive domains like healthcare. However, client heterogeneity in data, computing power, and tasks poses a significant…

Machine Learning · Computer Science 2024-10-01 Huidong Tang , Chen Li , Huachong Yu , Sayaka Kamei , Yasuhiko Morimoto

In the paper, we propose an effective and efficient Compositional Federated Learning (ComFedL) algorithm for solving a new compositional Federated Learning (FL) framework, which frequently appears in many data mining and machine learning…

Machine Learning · Computer Science 2023-07-28 Feihu Huang , Junyi Li

Federated learning (FL) is a rapidly growing privacy-preserving collaborative machine learning paradigm. In practical FL applications, local data from each data silo reflect local usage patterns. Therefore, there exists heterogeneity of…

Machine Learning · Computer Science 2022-02-01 Shenglai Zeng , Zonghang Li , Hongfang Yu , Yihong He , Zenglin Xu , Dusit Niyato , Han Yu

Federated learning (FL) is a distributed learning paradigm that enables a large number of mobile devices to collaboratively learn a model under the coordination of a central server without sharing their raw data. Despite its practical…

Machine Learning · Computer Science 2021-09-14 Bing Luo , Xiang Li , Shiqiang Wang , Jianwei Huang , Leandros Tassiulas

Federated learning (FL) enables a set of distributed clients to jointly train machine learning models while preserving their local data privacy, making it attractive for applications in healthcare, finance, mobility, and smart-city systems.…

Machine Learning · Computer Science 2026-03-26 Eman M. AbouNassar , Amr Elshall , Sameh Abdulah