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Federated Learning (FL) holds great potential for diverse applications owing to its privacy-preserving nature. However, its convergence is often challenged by non-IID data distributions, limiting its effectiveness in real-world deployments.…

Machine Learning · Computer Science 2025-04-22 Kun Zhai , Yifeng Gao , Difan Zou , Guangnan Ye , Siheng Chen , Xingjun Ma , Yu-Gang Jiang

Heterogeneous federated learning (HFL) aims to ensure effective and privacy-preserving collaboration among different entities. As newly joined clients require significant adjustments and additional training to align with the existing…

Machine Learning · Computer Science 2026-01-29 Kaile Wang , Jiannong Cao , Yu Yang , Xiaoyin Li , Mingjin Zhang

Federated learning often suffers from slow and unstable convergence due to the heterogeneous characteristics of participating client datasets. Such a tendency is aggravated when the client participation ratio is low since the information…

Machine Learning · Computer Science 2024-04-02 Geeho Kim , Jinkyu Kim , Bohyung Han

The performance of federated learning (FL) over wireless networks depend on the reliability of the client-server connectivity and clients' local computation capabilities. In this article we investigate the problem of client scheduling and…

Machine Learning · Computer Science 2021-06-15 Madhusanka Manimel Wadu , Sumudu Samarakoon , Mehdi Bennis

Data heterogeneity poses a fundamental challenge in federated learning (FL), especially when clients differ not only in distribution but also in the reliability of their predictions across individual examples. While personalized FL (PFL)…

Machine Learning · Computer Science 2025-09-29 Amr Abourayya , Jens Kleesiek , Bharat Rao , Michael Kamp

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) enables a set of client devices to collaboratively train a model without sharing raw data. This process, though, operates under the constrained computation and communication resources of edge devices. These…

Machine Learning · Computer Science 2025-06-17 Mohamed Yassine Boukhari , Akash Dhasade , Anne-Marie Kermarrec , Rafael Pires , Othmane Safsafi , Rishi Sharma

Federated learning (FL) collaboratively trains a shared global model depending on multiple local clients, while keeping the training data decentralized in order to preserve data privacy. However, standard FL methods ignore the noisy client…

Machine Learning · Computer Science 2022-12-02 Kahou Tam , Li Li , Bo Han , Chengzhong Xu , Huazhu Fu

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) enables decentralized model training without centralizing raw data. However, practical FL deployments often face a key realistic challenge: Clients participate intermittently in server aggregation and with unknown,…

Machine Learning · Computer Science 2025-07-15 Herlock , Rahimi , Dionysis Kalogerias

Federated Learning (FL) has become a widely used approach for training machine learning models on decentralized data, addressing the significant privacy concerns associated with traditional centralized methods. However, the efficiency of FL…

Machine Learning · Computer Science 2025-01-28 William Marfo , Deepak K. Tosh , Shirley V. Moore

Federated Learning is a novel paradigm that involves learning from data samples distributed across a large network of clients while the data remains local. It is, however, known that federated learning is prone to multiple system challenges…

Machine Learning · Computer Science 2021-01-01 Amirhossein Reisizadeh , Isidoros Tziotis , Hamed Hassani , Aryan Mokhtari , Ramtin Pedarsani

Federated learning (FL) enables multiple clients with distributed data sources to collaboratively train a shared model without compromising data privacy. However, existing FL paradigms face challenges due to heterogeneity in client data…

Machine Learning · Computer Science 2024-10-21 Brianna Mueller , W. Nick Street , Stephen Baek , Qihang Lin , Jingyi Yang , Yankun Huang

This work tackles the fundamental challenges in Federated Learning (FL) posed by arbitrary client participation and data heterogeneity, prevalent characteristics in practical FL settings. It is well-established that popular FedAvg-style…

Machine Learning · Computer Science 2025-10-07 Bicheng Ying , Zhe Li , Haibo Yang

Federated Learning (FL) has emerged as a key approach for distributed machine learning, enhancing online personalization while ensuring user data privacy. Instead of sending private data to a central server as in traditional approaches, FL…

Information Retrieval · Computer Science 2023-09-19 Francesco Fabbri , Xianghang Liu , Jack R. McKenzie , Bartlomiej Twardowski , Tri Kurniawan Wijaya

Federated Learning (FL) trains deep models across edge devices without centralizing raw data, preserving user privacy. However, client heterogeneity slows down convergence and limits global model accuracy. Clustered FL (CFL) mitigates this…

Machine Learning · Computer Science 2026-02-10 Minghao Li , Dmitrii Avdiukhin , Rana Shahout , Nikita Ivkin , Vladimir Braverman , Minlan Yu

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 (FL) enables privacy-preserving collaborative model training, but its effectiveness is often limited by client data heterogeneity. We introduce a client-selection algorithm that (i) dynamically forms nonoverlapping…

Machine Learning · Computer Science 2025-10-16 Alessandro Licciardi , Roberta Raineri , Anton Proskurnikov , Lamberto Rondoni , Lorenzo Zino

In Federated Learning (FL), clients independently train local models and share them with a central aggregator to build a global model. Impermissibility to access clients' data and collaborative training make FL appealing for applications…

Software Engineering · Computer Science 2024-02-26 Waris Gill , Ali Anwar , Muhammad Ali Gulzar

Federated learning (FL) enables distributed clients to collaboratively train a global model using local private data. Nevertheless, recent studies show that conventional FL algorithms still exhibit deficiencies in privacy protection, and…

Cryptography and Security · Computer Science 2026-03-31 Ruiyang Wang , Rong Pan , Zhengan Yao