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When implementing hierarchical federated learning over wireless networks, scalability assurance and the ability to handle both interference and device data heterogeneity are crucial. This work introduces a learning method designed to…

Information Theory · Computer Science 2024-01-04 Seyed Mohammad Azimi-Abarghouyi , Viktoria Fodor

Federated Learning is a collaborative machine learning framework to train a deep learning model without accessing clients' private data. Previous works assume one central parameter server either at the cloud or at the edge. The cloud server…

Networking and Internet Architecture · Computer Science 2019-11-01 Lumin Liu , Jun Zhang , S. H. Song , Khaled B. Letaief

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

Federated learning (FL) is a popular privacy-preserving edge-to-cloud technique used for training and deploying artificial intelligence (AI) models on edge devices. FL aims to secure local client data while also collaboratively training a…

Cryptography and Security · Computer Science 2025-01-22 Evan Gronberg , Liv d'Aliberti , Magnus Saebo , Aurora Hook

Federated learning (FL) enables distributed training with private client data, but its convergence is hindered by system heterogeneity under realistic communication scenarios. Most FL schemes addressing system heterogeneity utilize global…

Machine Learning · Computer Science 2025-09-19 Keumseo Ryum , Jinu Gong , Joonhyuk Kang

Mobile Edge Computing (MEC), which incorporates the Cloud, edge nodes and end devices, has shown great potential in bringing data processing closer to the data sources. Meanwhile, Federated learning (FL) has emerged as a promising…

Distributed, Parallel, and Cluster Computing · Computer Science 2021-04-26 Wentai Wu , Ligang He , Weiwei Lin , Rui Mao

Federated learning (FL) enables multiple clients to collaboratively train models without sharing their local data, and becomes an important privacy-preserving machine learning framework. However, classical FL faces serious security and…

Cryptography and Security · Computer Science 2023-07-27 Jingwei Yi , Fangzhao Wu , Huishuai Zhang , Bin Zhu , Tao Qi , Guangzhong Sun , Xing Xie

Federated learning promises to make machine learning feasible on distributed, private datasets by implementing gradient descent using secure aggregation methods. The idea is to compute a global weight update without revealing the…

Machine Learning · Computer Science 2019-12-03 Badih Ghazi , Rasmus Pagh , Ameya Velingker

Federated learning (FL) has emerged as a promising paradigm in machine learning, enabling collaborative model training across decentralized devices without the need for raw data sharing. In FL, a global model is trained iteratively on local…

Machine Learning · Computer Science 2025-04-01 Kanishka Ranaweera , Azadeh Ghari Neiat , Xiao Liu , Bipasha Kashyap , Pubudu N. Pathirana

Federated Learning (FL) enables collaborative model training without sharing raw data but suffers from limited scalability, high communication costs, and privacy risks due to its centralized architecture. This paper proposes FedSelect-ME, a…

Cryptography and Security · Computer Science 2025-11-05 Hanie Vatani , Reza Ebrahimi Atani

Secure aggregation enables federated learning (FL) to perform collaborative training of clients from local gradient updates without exposing raw data. However, existing secure aggregation schemes inevitably perform an expensive fresh setup…

Cryptography and Security · Computer Science 2024-06-18 Kaiping Cui , Xia Feng , Liangmin Wang , Haiqin Wu , Xiaoyu Zhang , Boris Düdder

Federated Learning (FL) is a novel distributed machine learning approach to leverage data from Internet of Things (IoT) devices while maintaining data privacy. However, the current FL algorithms face the challenges of non-independent and…

Machine Learning · Computer Science 2023-12-20 Gang Hu , Yinglei Teng , Nan Wang , F. Richard Yu

Federated learning (FL) was recently proposed to securely train models with data held over multiple locations (``clients'') under the coordination of a central server. Prolonged training times caused by slow clients may hinder the…

Machine Learning · Computer Science 2025-10-07 Charikleia Iakovidou , Kibaek Kim

Almost all existing hierarchical federated learning (FL) models are limited to two aggregation layers, restricting scalability and flexibility in complex, large-scale networks. In this work, we propose a Multi-Layer Hierarchical Federated…

Machine Learning · Computer Science 2026-02-17 Seyed Mohammad Azimi-Abarghouyi , Carlo Fischione

Federated learning (FL) is a distributed learning paradigm that preserves users' data privacy while leveraging the entire dataset of all participants. In FL, multiple models are trained independently on the clients and aggregated centrally…

Machine Learning · Computer Science 2023-01-11 Amin Eslami Abyane , Derui Zhu , Roberto Souza , Lei Ma , Hadi Hemmati

Federated learning (FL) is a system in which a central aggregator coordinates the efforts of multiple clients to solve machine learning problems. This setting allows training data to be dispersed in order to protect privacy. The purpose of…

Machine Learning · Computer Science 2022-06-27 Subrato Bharati , M. Rubaiyat Hossain Mondal , Prajoy Podder , V. B. Surya Prasath

The ubiquity of camera-enabled devices has led to large amounts of unlabeled image data being produced at the edge. The integration of self-supervised learning (SSL) and federated learning (FL) into one coherent system can potentially offer…

Computer Vision and Pattern Recognition · Computer Science 2023-07-17 Yasar Abbas Ur Rehman , Yan Gao , Pedro Porto Buarque de Gusmão , Mina Alibeigi , Jiajun Shen , Nicholas D. Lane

Hierarchical federated learning (HFL) designs introduce intermediate aggregator nodes between clients and the global federated learning server in order to reduce communication costs and distribute server load. One side effect is that…

Distributed, Parallel, and Cluster Computing · Computer Science 2024-07-25 Anna Lackinger , Pantelis A. Frangoudis , Ivan Čilić , Alireza Furutanpey , Ilir Murturi , Ivana Podnar Žarko , Schahram Dustdar

Secure model aggregation across many users is a key component of federated learning systems. The state-of-the-art protocols for secure model aggregation, which are based on additive masking, require all users to quantize their model updates…

Information Theory · Computer Science 2021-11-17 Ahmed Roushdy Elkordy , A. Salman Avestimehr

Federated clustering addresses the critical challenge of extracting patterns from decentralized, unlabeled data. However, it is hampered by the flaw that current approaches are forced to accept a compromise between performance and privacy:…

Machine Learning · Computer Science 2025-11-17 Guanxiong He , Jie Wang , Liaoyuan Tang , Zheng Wang , Rong Wang , Feiping Nie