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With the rapid development of the Internet of Things (IoT), AI model training on private data such as human sensing data is highly desired. Federated learning (FL) has emerged as a privacy-preserving distributed training framework for this…

Machine Learning · Computer Science 2026-01-27 Kaile Wang , Jiannong Cao , Yu Yang , Xiaoyin Li , Yinfeng Cao

Federated learning (FL) is a distributed framework for collaboratively training with privacy guarantees. In real-world scenarios, clients may have Non-IID data (local class imbalance) with poor annotation quality (label noise). The…

Machine Learning · Computer Science 2023-04-07 Chenrui Wu , Zexi Li , Fangxin Wang , Chao Wu

Federated learning (FL) is a distributed machine learning paradigm in which a large number of clients coordinate with a central server to learn a model without sharing their own training data. One central server is not enough, due to…

Today data is often scattered among billions of resource-constrained edge devices with security and privacy constraints. Federated Learning (FL) has emerged as a viable solution to learn a global model while keeping data private, but the…

Machine Learning · Computer Science 2021-12-08 Sijie Cheng , Jingwen Wu , Yanghua Xiao , Yang Liu , Yang Liu

Traditional federated optimization methods perform poorly with heterogeneous data (ie, accuracy reduction), especially for highly skewed data. In this paper, we investigate the label distribution skew in FL, where the distribution of labels…

Machine Learning · Computer Science 2022-09-27 Jie Zhang , Zhiqi Li , Bo Li , Jianghe Xu , Shuang Wu , Shouhong Ding , Chao Wu

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

Federated Learning (FL) enables privacy-preserving multi-source information fusion (MSIF) but is challenged by client drift in highly heterogeneous data settings. Many existing drift-mitigation strategies rely on reference-based…

Machine Learning · Computer Science 2026-02-12 Jungwon Seo , Ferhat Ozgur Catak , Chunming Rong , Kibeom Hong , Minhoe Kim

Federated learning (FL) is a decentralized privacy-preserving learning technique in which clients learn a joint collaborative model through a central aggregator without sharing their data. In this setting, all clients learn a single common…

Machine Learning · Computer Science 2021-06-01 Siddharth Divi , Habiba Farrukh , Berkay Celik

Federated learning (FL) enables collaboratively training deep learning models on decentralized data. However, there are three types of heterogeneities in FL setting bringing about distinctive challenges to the canonical federated learning…

Machine Learning · Computer Science 2020-09-18 Tao Shen , Jie Zhang , Xinkang Jia , Fengda Zhang , Gang Huang , Pan Zhou , Kun Kuang , Fei Wu , Chao Wu

As an emerging paradigm of federated learning, asynchronous federated learning offers significant speed advantages over traditional synchronous federated learning. Unlike synchronous federated learning, which requires waiting for all…

Machine Learning · Computer Science 2025-04-10 Chaoyi Lu , Yiding Sun , Pengbo Li , Zhichuan Yang

Federated Learning (FL) is a privacy-protected machine learning paradigm that allows model to be trained directly at the edge without uploading data. One of the biggest challenges faced by FL in practical applications is the heterogeneity…

Machine Learning · Computer Science 2021-08-20 Zirui Zhu , Ziyi Ye

Federated learning has recently gained popularity as a framework for distributed clients to collaboratively train a machine learning model using local data. While traditional federated learning relies on a central server for model…

Machine Learning · Computer Science 2025-09-03 I-Cheng Lin , Osman Yagan , Carlee Joe-Wong

Federated Learning (FL) allows collaborative machine learning training without sharing private data. Numerous studies have shown that one significant factor affecting the performance of federated learning models is the heterogeneity of data…

Machine Learning · Computer Science 2024-09-30 Liang Kuang , Kuangpu Guo , Jian Liang , Jianguo Zhang

Federated Learning (FL) provides decentralised model training, which effectively tackles problems such as distributed data and privacy preservation. However, the generalisation of global models frequently faces challenges from data…

Machine Learning · Computer Science 2025-09-05 Ozgu Goksu , Nicolas Pugeault

Federated Learning (FL) allows several clients to construct a common global machine-learning model without having to share their data. FL, however, faces the challenge of statistical heterogeneity between the client's data, which degrades…

Machine Learning · Computer Science 2024-01-26 Zahra Taghiyarrenani , Abdallah Alabdallah , Slawomir Nowaczyk , Sepideh Pashami

Federated Learning (FL) has emerged as a promising solution to perform deep learning on different data owners without exchanging raw data. However, non-IID data has been a key challenge in FL, which could significantly degrade the accuracy…

Machine Learning · Computer Science 2023-12-19 Yiqun Diao , Qinbin Li , Bingsheng He

Statistical heterogeneity of data present at client devices in a federated learning (FL) system renders the training of a global model in such systems difficult. Particularly challenging are the settings where due to communication resource…

Machine Learning · Computer Science 2024-10-07 Huancheng Chen , Haris Vikalo

Recently, semi-supervised federated learning (semi-FL) has been proposed to handle the commonly seen real-world scenarios with labeled data on the server and unlabeled data on the clients. However, existing methods face several challenges…

Computer Vision and Pattern Recognition · Computer Science 2024-06-13 Mingzhao Yang , Shangchao Su , Bin Li , Xiangyang Xue

In real-world applications, Federated Learning (FL) meets two challenges: (1) scalability, especially when applied to massive IoT networks; and (2) how to be robust against an environment with heterogeneous data. Realizing the first…

Machine Learning · Computer Science 2022-10-03 Minh-Duong Nguyen , Quoc-Viet Pham , Dinh Thai Hoang , Long Tran-Thanh , Diep N. Nguyen , Won-Joo Hwang

Federated Learning (FL) is designed to protect the data privacy of each client during the training process by transmitting only models instead of the original data. However, the trained model may memorize certain information about the…

Machine Learning · Computer Science 2022-01-25 Chen Wu , Sencun Zhu , Prasenjit Mitra