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Federated learning (FL) is a promising approach that enables distributed clients to collaboratively train a global model while preserving their data privacy. However, FL often suffers from data heterogeneity problems, which can…

Machine Learning · Computer Science 2023-11-29 Ye Lin Tun , Minh N. H. Nguyen , Chu Myaet Thwal , Jinwoo Choi , Choong Seon Hong

Federated learning is a distributed paradigm that allows multiple parties to collaboratively train deep models without exchanging the raw data. However, the data distribution among clients is naturally non-i.i.d., which leads to severe…

Machine Learning · Computer Science 2023-01-31 Tianfei Zhou , Ender Konukoglu

Federated Learning (FL) suffers from severe performance degradation due to the data heterogeneity among clients. Existing works reveal that the fundamental reason is that data heterogeneity can cause client drift where the local model…

Machine Learning · Computer Science 2025-01-22 Haoran Xu , Jiaze Li , Wanyi Wu , Hao Ren

Federated learning enables collaborative model training without sharing raw data, but its performance can degrade substantially under heterogeneous client data distributions. A single global model often cannot satisfy diverse client…

Machine Learning · Computer Science 2026-05-27 Yunseok Kang , Jaeyoung Song

Federated learning in practice must contend with heterogeneous feature spaces, severe non-IID data, and scarce labels across clients. We present FedFusion, a federated transfer-learning framework that unifies domain adaptation and frugal…

Machine Learning · Computer Science 2025-09-24 Ferdinand Kahenga , Antoine Bagula , Patrick Sello , Sajal K. Das

Non-IID dataset and heterogeneous environment of the local clients are regarded as a major issue in Federated Learning (FL), causing a downturn in the convergence without achieving satisfactory performance. In this paper, we propose a novel…

Machine Learning · Computer Science 2021-12-30 Hunmin Lee , Yueyang Liu , Donghyun Kim , Yingshu Li

Federated learning algorithms perform reasonably well on independent and identically distributed (IID) data. They, on the other hand, suffer greatly from heterogeneous environments, i.e., Non-IID data. Despite the fact that many research…

Machine Learning · Computer Science 2023-09-15 Yeachan Kim , Bonggun Shin

Federated learning (FL) typically faces data heterogeneity, i.e., distribution shifting among clients. Sharing clients' information has shown great potentiality in mitigating data heterogeneity, yet incurs a dilemma in preserving privacy…

Machine Learning · Computer Science 2023-10-12 Zhiqin Yang , Yonggang Zhang , Yu Zheng , Xinmei Tian , Hao Peng , Tongliang Liu , Bo Han

Federated Learning (FL) enables collaborative model training across multiple clients while preserving data privacy. Traditional FL methods often use a global model to fit all clients, assuming that clients' data are independent and…

Machine Learning · Computer Science 2025-12-01 Dario Fenoglio , Mohan Li , Pietro Barbiero , Nicholas D. Lane , Marc Langheinrich , Martin Gjoreski

One of the key challenges in federated learning (FL) is local data distribution heterogeneity across clients, which may cause inconsistent feature spaces across clients. To address this issue, we propose a novel method FedFM, which guides…

Machine Learning · Computer Science 2022-10-17 Rui Ye , Zhenyang Ni , Chenxin Xu , Jianyu Wang , Siheng Chen , Yonina C. Eldar

Federated learning (FL) is a distributed learning method that offers medical institutes the prospect of collaboration in a global model while preserving the privacy of their patients. Although most medical centers conduct similar medical…

Machine Learning · Computer Science 2022-07-08 Yousef Yeganeh , Azade Farshad , Johann Boschmann , Richard Gaus , Maximilian Frantzen , Nassir Navab

Due to the scarcity of industrial data, individual equipment users, particularly start-ups, struggle to independently train a comprehensive fault diagnosis model; federated learning enables collaborative training while ensuring data…

Artificial Intelligence · Computer Science 2026-04-10 Zexiao Wang , Yankai Wang , Xiaoqiang Liao , Xinguo Ming , Weiming Shen

Clustered federated learning (CFL) addresses the performance challenges posed by data heterogeneity in federated learning (FL) by organizing edge devices with similar data distributions into clusters, enabling collaborative model training…

Machine Learning · Computer Science 2025-01-06 Yuxin Zhang , Haoyu Chen , Zheng Lin , Zhe Chen , Jin Zhao

Federated learning is an emerging distributed machine learning framework aiming at protecting data privacy. Data heterogeneity is one of the core challenges in federated learning, which could severely degrade the convergence rate and…

Machine Learning · Statistics 2025-11-27 Feifei Wang , Huiyun Tang , Yang Li

Data heterogeneity across clients in federated learning (FL) settings is a widely acknowledged challenge. In response, personalized federated learning (PFL) emerged as a framework to curate local models for clients' tasks. In PFL, a common…

Machine Learning · Computer Science 2023-12-27 Yutong Dai , Zeyuan Chen , Junnan Li , Shelby Heinecke , Lichao Sun , Ran Xu

Federated Learning (FL) models often experience client drift caused by heterogeneous data, where the distribution of data differs across clients. To address this issue, advanced research primarily focuses on manipulating the existing…

Machine Learning · Computer Science 2024-03-15 Zhenheng Tang , Yonggang Zhang , Shaohuai Shi , Xinmei Tian , Tongliang Liu , Bo Han , Xiaowen Chu

With privacy as a motivation, Federated Learning (FL) is an increasingly used paradigm where learning takes place collectively on edge devices, each with a cache of user-generated training examples that remain resident on the local device.…

Machine Learning · Computer Science 2021-11-25 Sean Augenstein , Andrew Hard , Kurt Partridge , Rajiv Mathews

In federated clustering, multiple data-holding clients collaboratively group data without exchanging raw data. This field has seen notable advancements through its marriage with contrastive learning, exemplified by Cluster-Contrastive…

Machine Learning · Computer Science 2024-02-21 Jie Yan , Jing Liu , Yi-Zi Ning , Zhong-Yuan Zhang

Federated Learning (FL) enables a group of clients to collaboratively train a model without sharing individual data, but its performance drops when client data are heterogeneous. Clustered FL tackles this by grouping similar clients.…

Machine Learning · Computer Science 2026-03-02 Anik Pramanik , Murat Kantarcioglu , Vincent Oria , Shantanu Sharma

Federated Learning (FL) is a distributed learning paradigm where clients collaboratively train a model while keeping their own data private. With an increasing scale of clients and models, FL encounters two key challenges, client drift due…

Machine Learning · Computer Science 2025-01-20 Jianhui Sun , Xidong Wu , Heng Huang , Aidong Zhang