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Federated Learning (FL) enables a group of clients to jointly train a machine learning model with the help of a centralized server. Clients do not need to submit their local data to the server during training, and hence the local training…

Machine Learning · Computer Science 2023-01-10 Liling Zhang , Xinyu Lei , Yichun Shi , Hongyu Huang , Chao Chen

Federated Learning (FL) is a decentralized learning method used to train machine learning algorithms. In FL, a global model iteratively collects the parameters of local models without accessing their local data. However, a significant…

Machine Learning · Computer Science 2023-08-29 Mingjie Wang , Jianxiong Guo , Weijia Jia

We consider a foundational unsupervised learning task of $k$-means data clustering, in a federated learning (FL) setting consisting of a central server and many distributed clients. We develop SecFC, which is a secure federated clustering…

Machine Learning · Computer Science 2022-06-01 Songze Li , Sizai Hou , Baturalp Buyukates , Salman Avestimehr

Federated Learning (FL) emerged as a decentralized paradigm to train models while preserving privacy. However, conventional FL struggles with data heterogeneity and class imbalance, which degrade model performance. Clustered FL balances…

Machine Learning · Computer Science 2025-05-05 Alessandro Licciardi , Davide Leo , Eros Fanì , Barbara Caputo , Marco Ciccone

Federated learning (FL) is a new paradigm for distributed machine learning that allows a global model to be trained across multiple clients without compromising their privacy. Although FL has demonstrated remarkable success in various…

Machine Learning · Computer Science 2023-06-06 Haolin Wang , Xuefeng Liu , Jianwei Niu , Shaojie Tang , Jiaxing Shen

Federated learning (FL) enables privacy-preserving collaborative model training without direct data sharing. Model-heterogeneous FL (MHFL) extends this paradigm by allowing clients to train personalized models with heterogeneous…

Machine Learning · Computer Science 2026-03-13 Ziqiao Weng , Weidong Cai , Bo Zhou

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

Unsupervised domain adaptation has been widely adopted to generalize models for unlabeled data in a target domain, given labeled data in a source domain, whose data distributions differ from the target domain. However, existing works are…

Computer Vision and Pattern Recognition · Computer Science 2021-05-18 Weiming Zhuang , Xin Gan , Yonggang Wen , Xuesen Zhang , Shuai Zhang , Shuai Yi

With the advancement of edge computing, federated learning (FL) displays a bright promise as a privacy-preserving collaborative learning paradigm. However, one major challenge for FL is the data heterogeneity issue, which refers to the…

Machine Learning · Computer Science 2025-05-27 Huan Wang , Haoran Li , Huaming Chen , Jun Yan , Lijuan Wang , Jiahua Shi , Shiping Chen , Jun Shen

Aiming at privacy preservation, Federated Learning (FL) is an emerging machine learning approach enabling model training on decentralized devices or data sources. The learning mechanism of FL relies on aggregating parameter updates from…

Machine Learning · Computer Science 2024-05-21 Jiayan Chen , Zhirong Qian , Tianhui Meng , Xitong Gao , Tian Wang , Weijia Jia

Federated Learning (FL) is an advanced distributed machine learning approach, that protects the privacy of each vehicle by allowing the model to be trained on multiple devices simultaneously without the need to upload all data to a road…

Machine Learning · Computer Science 2025-06-23 Xueying Gu , Qiong Wu , Pingyi Fan , Qiang Fan

Federated learning (FL) enables collaborative training across clients while preserving privacy. While most existing FL methods assume homogeneous model architectures, client heterogeneity in both data and resources makes this assumption…

Machine Learning · Computer Science 2026-03-30 Yuan Yao , Lixu Wang , Jiaqi Wu , Jin Song , Simin Chen , Zehua Wang , Zijian Tian , Wei Chen , Huixia Li , Xiaoxiao Li

Federated learning (FL) can help promote data privacy by training a shared model in a de-centralized manner on the physical devices of clients. In the presence of highly heterogeneous distributions of local data, personalized FL strategy…

Machine Learning · Statistics 2022-10-12 Zhe Liu , Yue Hui , Fuchun Peng

Motivated by the explosive computing capabilities at end user equipments, as well as the growing privacy concerns over sharing sensitive raw data, a new machine learning paradigm, named federated learning (FL) has emerged. By training…

Networking and Internet Architecture · Computer Science 2021-06-07 Chuan Ma , Jun Li , Ming Ding , Long Shi , Taotao Wang , Zhu Han , H. Vincent Poor

Traditional machine learning relies on a centralized data pipeline, i.e., data are provided to a central server for model training. In many applications, however, data are inherently fragmented. Such a decentralized nature of these…

Machine Learning · Computer Science 2021-11-02 Ye Yuan , Jun Liu , Dou Jin , Zuogong Yue , Ruijuan Chen , Maolin Wang , Chuan Sun , Lei Xu , Feng Hua , Xin He , Xinlei Yi , Tao Yang , Hai-Tao Zhang , Shaochun Sui , Han Ding

Federated Learning aims at training a global model from multiple decentralized devices (i.e. clients) without exchanging their private local data. A key challenge is the handling of non-i.i.d. (independent identically distributed) data…

Machine Learning · Computer Science 2022-07-20 Xin Dong , Sai Qian Zhang , Ang Li , H. T. Kung

In recent years, data are typically distributed in multiple organizations while the data security is becoming increasingly important. Federated Learning (FL), which enables multiple parties to collaboratively train a model without…

Distributed, Parallel, and Cluster Computing · Computer Science 2023-03-13 Ji Liu , Xuehai Zhou , Lei Mo , Shilei Ji , Yuan Liao , Zheng Li , Qin Gu , Dejing Dou

Unsupervised Federated Learning (UFL) aims to collaboratively train a global model across distributed clients without sharing data or accessing label information. Previous UFL works have predominantly focused on representation learning and…

Computer Vision and Pattern Recognition · Computer Science 2025-10-14 Kuangpu Guo , Lijun Sheng , Yongcan Yu , Jian Liang , Zilei Wang , Ran He

Non-Independent and Identically Distributed (non-IID) data in Federated Learning (FL) causes client drift issues, leading to slower convergence and reduced model performance. While existing approaches mitigate this issue in Centralized FL…

Machine Learning · Computer Science 2025-01-07 Chao Feng , Hongjie Guan , Alberto Huertas Celdrán , Jan von der Assen , Gérôme Bovet , Burkhard Stiller

Personalization in federated learning (FL) functions as a coordinator for clients with high variance in data or behavior. Ensuring the convergence of these clients' models relies on how closely users collaborate with those with similar…

Machine Learning · Computer Science 2023-02-24 Eunjeong Jeong , Marios Kountouris