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Federated Learning (FL) is a collaborative machine learning technique to train a global model without obtaining clients' private data. The main challenges in FL are statistical diversity among clients, limited computing capability among…

Machine Learning · Computer Science 2023-03-07 Xiaofeng Liu , Yinchuan Li , Qing Wang , Xu Zhang , Yunfeng Shao , Yanhui Geng

Personalized Federated Learning (FL) is an emerging research field in FL that learns an easily adaptable global model in the presence of data heterogeneity among clients. However, one of the main challenges for personalized FL is the heavy…

Machine Learning · Computer Science 2022-06-14 Jaehun Song , Min-hwan Oh , Hyung-Sin Kim

In Federated Learning, we aim to train models across multiple computing units (users), while users can only communicate with a common central server, without exchanging their data samples. This mechanism exploits the computational power of…

Machine Learning · Computer Science 2020-10-26 Alireza Fallah , Aryan Mokhtari , Asuman Ozdaglar

Different from conventional federated learning, personalized federated learning (PFL) is able to train a customized model for each individual client according to its unique requirement. The mainstream approach is to adopt a kind of weighted…

Machine Learning · Computer Science 2023-07-18 Jiahao Liu , Jiang Wu , Jinyu Chen , Miao Hu , Yipeng Zhou , Di Wu

Personalized Federated Learning (PFL) aims to address the statistical heterogeneity of data across clients by learning the personalized model for each client. Among various PFL approaches, the personalized aggregation-based approach…

Machine Learning · Computer Science 2025-10-09 Jiarui Song , Yunheng Shen , Chengbin Hou , Pengyu Wang , Jinbao Wang , Ke Tang , Hairong Lv

Federated learning (FL for simplification) is a distributed machine learning technique that utilizes global servers and collaborative clients to achieve privacy-preserving global model training without direct data sharing. However,…

Machine Learning · Computer Science 2022-11-28 Mingjia Shi , Yuhao Zhou , Qing Ye , Jiancheng Lv

Federated learning (FL) has emerged as the predominant approach for collaborative training of neural network models across multiple users, without the need to gather the data at a central location. One of the important challenges in this…

Machine Learning · Computer Science 2021-07-15 Matthias Reisser , Christos Louizos , Efstratios Gavves , Max Welling

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~(FL) has recently attracted increasing attention from academia and industry, with the ultimate goal of achieving collaborative training under privacy and communication constraints. Existing iterative model averaging based…

Machine Learning · Computer Science 2022-07-21 Yuanhao Xiong , Ruochen Wang , Minhao Cheng , Felix Yu , Cho-Jui Hsieh

Statistical heterogeneity is a root cause of tension among accuracy, fairness, and robustness of federated learning (FL), and is key in paving a path forward. Personalized FL (PFL) is an approach that aims to reduce the impact of…

Machine Learning · Computer Science 2024-07-24 Shengkun Zhu , Jinshan Zeng , Sheng Wang , Yuan Sun , Xiaodong Li , Yuan Yao , Zhiyong Peng

Model-heterogeneous personalized federated learning (MHPFL) enables FL clients to train structurally different personalized models on non-independent and identically distributed (non-IID) local data. Existing MHPFL methods focus on…

Machine Learning · Computer Science 2024-04-30 Liping Yi , Han Yu , Chao Ren , Heng Zhang , Gang Wang , Xiaoguang Liu , Xiaoxiao Li

Personalized federated learning (PFL) often fails under label skew and non-stationarity because a single global parameterization ignores client-specific geometry. We introduce VGM$^2$ (Variational Gaussian Mixture Manifold), a…

Machine Learning · Computer Science 2025-09-16 Sai Puppala , Ismail Hossain , Md Jahangir Alam , Sajedul Talukder

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

Federated graph learning is a widely recognized technique that promotes collaborative training of graph neural networks (GNNs) by multi-client graphs.However, existing approaches heavily rely on the communication of model parameters or…

Machine Learning · Computer Science 2025-05-06 Hao Zhang , Xunkai Li , Yinlin Zhu , Lianglin Hu

The popularity of federated learning (FL) is on the rise, along with growing concerns about data privacy in artificial intelligence applications. FL facilitates collaborative multi-party model learning while simultaneously ensuring the…

Machine Learning · Computer Science 2024-02-19 Muhammad Firdaus , Kyung-Hyune Rhee

In Federated Learning (FL), the distributed nature and heterogeneity of client data present both opportunities and challenges. While collaboration among clients can significantly enhance the learning process, not all collaborations are…

Machine Learning · Computer Science 2024-07-18 Nazarii Tupitsa , Samuel Horváth , Martin Takáč , Eduard Gorbunov

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

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 learning paradigm that enables mutually untrusting clients to collaboratively train a common machine learning model. Client data privacy is paramount in FL. At the same time, the model must be…

Machine Learning · Computer Science 2022-08-18 Hamid Mozaffari , Virendra J. Marathe , Dave Dice

Personalized Federated Learning (PFL) aims to acquire customized models for each client without disclosing raw data by leveraging the collective knowledge of distributed clients. However, the data collected in real-world scenarios is likely…

Machine Learning · Computer Science 2024-08-06 Fengling Lv , Xinyi Shang , Yang Zhou , Yiqun Zhang , Mengke Li , Yang Lu