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Federated learning (FL) is fundamentally a distributed optimization problem executed by communicating agents with local data, local computation, and partial system visibility. Once FL is viewed through that lens, hierarchy is not merely a…

Machine Learning · Computer Science 2026-05-05 Seyed Mohammad Azimi-Abarghouyi , Mehdi Bennis , Leandros Tassiulas

In the traditional distributed machine learning scenario, the user's private data is transmitted between clients and a central server, which results in significant potential privacy risks. In order to balance the issues of data privacy and…

Distributed, Parallel, and Cluster Computing · Computer Science 2022-12-20 Zihao Zhao , Yuzhu Mao , Yang Liu , Linqi Song , Ye Ouyang , Xinlei Chen , Wenbo Ding

Federated learning (FL) has been developed as a promising framework to leverage the resources of edge devices, enhance customers' privacy, comply with regulations, and reduce development costs. Although many methods and applications have…

Machine Learning · Computer Science 2022-02-03 Jie Ding , Eric Tramel , Anit Kumar Sahu , Shuang Wu , Salman Avestimehr , Tao Zhang

Federated learning (FL) provides a distributed learning framework for multiple participants to collaborate learning without sharing raw data. In many practical FL scenarios, participants have heterogeneous resources due to disparities in…

Machine Learning · Computer Science 2022-03-21 Junyuan Hong , Haotao Wang , Zhangyang Wang , Jiayu Zhou

Federated Learning (FL) is a promising technique for the collaborative training of deep neural networks across multiple devices while preserving data privacy. Despite its potential benefits, FL is hindered by excessive communication costs…

Machine Learning · Computer Science 2024-02-27 Vasileios Tsouvalas , Aaqib Saeed , Tanir Ozcelebi , Nirvana Meratnia

The integration of IoT and AI has unlocked innovation across industries, but growing privacy concerns and data isolation hinder progress. Traditional centralized ML struggles to overcome these challenges, which has led to the rise of…

Machine Learning · Computer Science 2025-12-01 Meriem Arbaoui , Mohamed-el-Amine Brahmia , Abdellatif Rahmoun , Mourad Zghal

Federated learning (FL) is an effective paradigm for enhancing the learning capability of edge devices while preserving data privacy. In geographically dispersed FL systems, such as sensor networks in remote areas, unmanned aerial vehicles…

Machine Learning · Computer Science 2026-05-26 Shiqian Guo , Jianqing Liu , Beatriz Lorenzo

Federated learning (FL) is a privacy-preserving distributed machine learning paradigm that operates at the wireless edge. It enables clients to collaborate on model training while keeping their data private from adversaries and the central…

Machine Learning · Computer Science 2023-06-06 Wayne Lemieux , Raphael Pinard , Mitra Hassani

Federated Learning (FL) has been becoming a popular interdisciplinary research area in both applied mathematics and information sciences. Mathematically, FL aims to collaboratively optimize aggregate objective functions over distributed…

Machine Learning · Computer Science 2024-12-03 Shusen Yang , Fangyuan Zhao , Zihao Zhou , Liang Shi , Xuebin Ren , Zongben Xu

Federated Learning (FL) has emerged as a prominent privacy-preserving technique for enabling use cases like confidential clinical machine learning. FL operates by aggregating models trained by remote devices which owns the data. Thus, FL…

Machine Learning · Computer Science 2024-04-23 Michael Duchesne , Kaiwen Zhang , Chamseddine Talhi

Federated learning (FL) can help promote data privacy by training a shared model in a de-centralized manner on the physical devices of clients. In the presence of highly heterogeneous distributions of local data, personalized FL strategy…

Machine Learning · Statistics 2022-10-12 Zhe Liu , Yue Hui , Fuchun Peng

Federated learning (FL) is a distributed machine learning technique in which multiple clients cooperate to train a shared model without exchanging their raw data. However, heterogeneity of data distribution among clients usually leads to…

Machine Learning · Computer Science 2023-03-23 Yu Qiao , Seong-Bae Park , Sun Moo Kang , Choong Seon Hong

Model-free techniques, such as machine learning (ML), have recently attracted much interest towards the physical layer design, e.g., symbol detection, channel estimation, and beamforming. Most of these ML techniques employ centralized…

Signal Processing · Electrical Eng. & Systems 2021-08-09 Ahmet M. Elbir , Anastasios K. Papazafeiropoulos , Symeon Chatzinotas

Federated Learning (FL) enables collaborative model training across distributed clients while preserving data privacy. However, optimizing both energy efficiency and model accuracy remains a challenge, given device and data heterogeneity.…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-06-13 Roopkatha Banerjee , Tejus Chandrashekar , Ananth Eswar , Yogesh Simmhan

Federated Learning (FL) is a distributed machine learning (ML) paradigm that enables multiple parties to jointly re-train a shared model without sharing their data with any other parties, offering advantages in both scale and privacy. We…

Machine Learning · Computer Science 2019-12-17 Daniel Peterson , Pallika Kanani , Virendra J. Marathe

Robust machine learning (ML) models can be developed by leveraging large volumes of data and distributing the computational tasks across numerous devices or servers. Federated learning (FL) is a technique in the realm of ML that facilitates…

Federated learning (FL) has emerged as a promising framework for distributed learning, enabling collaborative model training without sharing private data. Existing wireless FL works primarily adopt two communication strategies: (1)…

Machine Learning · Computer Science 2026-04-16 Muhammad Faraz Ul Abrar , Nicolò Michelusi

Online federated learning (FL) enables geographically distributed devices to learn a global shared model from locally available streaming data. Most online FL literature considers a best-case scenario regarding the participating clients and…

Machine Learning · Computer Science 2023-10-31 Francois Gauthier , Vinay Chakravarthi Gogineni , Stefan Werner , Yih-Fang Huang , Anthony Kuh

Federated learning (FL) enables collaborative model training across distributed devices without sharing raw data, but applying FL to multi-modal settings introduces significant challenges. Clients typically possess heterogeneous modalities…

Machine Learning · Computer Science 2026-03-20 Mohamed Badi , Chaouki Ben Issaid , Mehdi Bennis

Federated learning (FL) is recognized as a key enabling technology to support distributed artificial intelligence (AI) services in future 6G. By supporting decentralized data training and collaborative model training among devices, FL…

Signal Processing · Electrical Eng. & Systems 2021-11-02 Shaoming Huang , Pengfei Zhang , Yijie Mao , Lixiang Lian , Yuanming Shi