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Statistical data heterogeneity is a significant barrier to convergence in federated learning (FL). While prior work has advanced heterogeneous FL through better optimization objectives, these methods fall short when there is extreme data…

Machine Learning · Computer Science 2025-04-17 Nurbek Tastan , Samuel Horvath , Martin Takac , Karthik Nandakumar

Generalization performance is a key metric in evaluating machine learning models when applied to real-world applications. Good generalization indicates the model can predict unseen data correctly when trained under a limited number of data.…

Machine Learning · Computer Science 2023-06-07 Zhenyu Sun , Xiaochun Niu , Ermin Wei

Federated learning (FL) is an emerging, privacy-preserving machine learning paradigm, drawing tremendous attention in both academia and industry. A unique characteristic of FL is heterogeneity, which resides in the various hardware…

Machine Learning · Computer Science 2021-03-15 Chengxu Yang , Qipeng Wang , Mengwei Xu , Zhenpeng Chen , Kaigui Bian , Yunxin Liu , Xuanzhe Liu

Federated learning (FL) is a decentralized machine learning approach where independent learners process data privately. Its goal is to create a robust and accurate model by aggregating and retraining local models over multiple rounds.…

Machine Learning · Computer Science 2023-10-13 Ensiye Kiyamousavi , Boris Kraychev , Ivan Koychev

Fairness has emerged as one of the key challenges in federated learning. In horizontal federated settings, data heterogeneity often leads to substantial performance disparities across clients, raising concerns about equitable model…

Machine Learning · Computer Science 2025-07-18 ShanBin Liu

Federated Learning (FL) seeks to distribute model training across local clients without collecting data in a centralized data-center, hence removing data-privacy concerns. A major challenge for FL is data heterogeneity (where each client's…

Machine Learning · Computer Science 2022-09-22 Junjiao Tian , James Seale Smith , Zsolt Kira

Federated Learning (FL) has emerged as the state-of-the-art approach for learning from decentralized data in privacy-constrained scenarios.However, system and statistical challenges hinder its real-world applicability, requiring efficient…

Machine Learning · Computer Science 2025-06-30 Riccardo Zaccone , Sai Praneeth Karimireddy , Carlo Masone , Marco Ciccone

Federated graph learning (FGL) enables multiple clients to collaboratively train powerful graph neural networks without sharing their private, decentralized graph data. Inherited from generic federated learning, FGL is critically challenged…

Machine Learning · Computer Science 2025-08-15 Xinrui Li , Qilin Fan , Tianfu Wang , Kaiwen Wei , Ke Yu , Xu Zhang

Federated learning (FL) enables distributed devices to collaboratively train machine learning models while maintaining data privacy. However, the heterogeneous hardware capabilities of devices often result in significant training delays, as…

Machine Learning · Computer Science 2025-09-23 Letian Zhang , Bo Chen , Jieming Bian , Lei Wang , Jie Xu

We consider a federated learning (FL) system consisting of multiple clients and a server, where the clients aim to collaboratively learn a common decision model from their distributed data. Unlike the conventional FL framework that assumes…

Machine Learning · Computer Science 2023-05-10 Kun Jin , Tongxin Yin , Zhongzhu Chen , Zeyu Sun , Xueru Zhang , Yang Liu , Mingyan Liu

Federated Learning (FL) is a well-known framework for successfully performing a learning task in an edge computing scenario where the devices involved have limited resources and incomplete data representation. The basic assumption of FL is…

Machine Learning · Computer Science 2023-12-08 Lorenzo Valerio , Chiara Boldrini , Andrea Passarella , János Kertész , Márton Karsai , Gerardo Iñiguez

There is growing research interest in measuring the statistical heterogeneity of clients' local datasets. Such measurements are used to estimate the suitability for collaborative training of personalized federated learning (PFL) models.…

Machine Learning · Computer Science 2024-10-29 Zhilong Li , Xiaohu Wu , Xiaoli Tang , Tiantian He , Yew-Soon Ong , Mengmeng Chen , Qiqi Liu , Qicheng Lao , Han Yu

Federated Learning (FL) on graphs enables collaborative model training to enhance performance without compromising the privacy of each client. However, existing methods often overlook the mutable nature of graph data, which frequently…

Machine Learning · Computer Science 2025-03-07 Sungwon Kim , Yoonho Lee , Yunhak Oh , Namkyeong Lee , Sukwon Yun , Junseok Lee , Sein Kim , Carl Yang , Chanyoung Park

In practical federated learning (FL), the large communication overhead between clients and the server is often a significant bottleneck. Gradient compression methods can effectively reduce this overhead, while error feedback (EF) restores…

Machine Learning · Computer Science 2026-02-13 Diying Yang , Yingwei Hou , Weigang Wu

Federated learning enables multiple institutions to collaboratively train machine learning models on their local data in a privacy-preserving way. However, its distributed nature often leads to significant heterogeneity in data…

Machine Learning · Computer Science 2021-07-20 Liangqiong Qu , Niranjan Balachandar , Daniel L Rubin

With the rapid proliferation of smart mobile devices, federated learning (FL) has been widely considered for application in wireless networks for distributed model training. However, data heterogeneity, e.g., non-independently identically…

Machine Learning · Computer Science 2023-08-08 Xuefeng Han , Jun Li , Wen Chen , Zhen Mei , Kang Wei , Ming Ding , H. Vincent Poor

Federated Learning (FL) allows collaborative training while ensuring data privacy across distributed edge devices, making it a popular solution for privacy-sensitive applications. However, FL faces significant challenges due to statistical…

Machine Learning · Computer Science 2025-05-16 Huy Q. Le , Latif U. Khan , Choong Seon Hong

Federated Learning (FL) facilitates the fine-tuning of Foundation Models (FMs) using distributed data sources, with Low-Rank Adaptation (LoRA) gaining popularity due to its low communication costs and strong performance. While recent work…

Machine Learning · Computer Science 2025-05-27 Zihao Peng , Jiandian Zeng , Boyuan Li , Guo Li , Shengbo Chen , Tian Wang

As people pay more and more attention to privacy protection, Federated Learning (FL), as a promising distributed machine learning paradigm, is receiving more and more attention. However, due to the biased distribution of data on devices in…

Machine Learning · Computer Science 2023-02-27 Yuquan Zhang , Yongquan Zhang

Federated Learning (FL) has emerged as a prominent distributed machine learning framework that enables geographically discrete clients to train a global model collaboratively while preserving their privacy-sensitive data. However, due to…

Distributed, Parallel, and Cluster Computing · Computer Science 2024-04-15 Shensheng Zheng , Wenhao Yuan , Xuehe Wang , Lingjie Duan