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In this paper, we address the dichotomy between heterogeneous models and simultaneous training in Federated Learning (FL) via a clustering framework. We define a new clustering model for FL based on the (optimal) local models of the users:…

Machine Learning · Statistics 2022-10-24 Harshvardhan , Avishek Ghosh , Arya Mazumdar

Federated Learning (FL) aims to learn a single global model that enables the central server to help the model training in local clients without accessing their local data. The key challenge of FL is the heterogeneity of local data in…

Machine Learning · Computer Science 2023-04-17 Sicong Liang , Junchao Tian , Shujun Yang , Yu Zhang

The paper studies a fundamental federated learning (FL) problem involving multiple clients with heterogeneous constrained resources. Compared with the numerous training parameters, the computing and communication resources of clients are…

Machine Learning · Computer Science 2024-06-21 Ruirui Zhang , Xingze Wu , Yifei Zou , Zhenzhen Xie , Peng Li , Xiuzhen Cheng , Dongxiao Yu

SplitFed Learning (SFL) combines federated learning and split learning to enable collaborative training across distributed edge devices; however, it faces significant challenges in heterogeneous environments with diverse computational and…

Distributed, Parallel, and Cluster Computing · Computer Science 2026-05-27 Abdullah Al Asif , Sixing Yu , Juan Pablo Munoz , Arya Mazaheri , Ali Jannesari

Federated learning (FL) is a viable technique to train a shared machine learning model without sharing data. Hierarchical FL (HFL) system has yet to be studied regrading its multiple levels of energy, computation, communication, and client…

Machine Learning · Computer Science 2024-06-24 Xiaojing Chen , Zhenyuan Li , Wei Ni , Xin Wang , Shunqing Zhang , Yanzan Sun , Shugong Xu , Qingqi Pei

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

Most existing personalized federated learning approaches are based on intricate designs, which often require complex implementation and tuning. In order to address this limitation, we propose a simple yet effective personalized federated…

Distributed, Parallel, and Cluster Computing · Computer Science 2024-01-30 Jiaqi Wang , Yuzhong Chen , Yuhang Wu , Mahashweta Das , Hao Yang , Fenglong Ma

Federated Learning (FL) has emerged as a transformative paradigm for distributed machine learning while preserving data privacy. However, existing approaches predominantly focus on model heterogeneity and aggregation techniques, largely…

Machine Learning · Computer Science 2025-09-23 Sajid Hussain , Muhammad Sohail , Nauman Ali Khan , Naima Iltaf , Ihtesham ul Islam

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 novel distributed machine learning which allows thousands of edge devices to train model locally without uploading data concentrically to the server. But since real federated settings are resource-constrained,…

Machine Learning · Computer Science 2024-04-16 Li Li , Moming Duan , Duo Liu , Yu Zhang , Ao Ren , Xianzhang Chen , Yujuan Tan , Chengliang Wang

Federated Learning (FL) enables large-scale distributed training of machine learning models, while still allowing individual nodes to maintain data locally. However, executing FL at scale comes with inherent practical challenges: 1)…

Machine Learning · Computer Science 2025-05-23 Hossein Zakerinia , Shayan Talaei , Giorgi Nadiradze , Dan Alistarh

Hierarchical federated learning (HFL) shows great advantages over conventional two-layer federated learning (FL) in reducing network overhead and interaction latency while still retaining the data privacy of distributed FL clients. However,…

Machine Learning · Computer Science 2023-11-07 Bibo Wu , Fang Fang , Xianbin Wang , Donghong Cai , Shu Fu , Zhiguo Ding

Federated Learning (FL) is a promising distributed machine learning framework that allows collaborative learning of a global model across decentralized devices without uploading their local data. However, in real-world FL scenarios, the…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-03-11 Md Sirajul Islam , Sanjeev Panta , Fei Xu , Xu Yuan , Li Chen , Nian-Feng Tzeng

We consider a federated learning (FL) system consisting of multiple clients and a server, where the clients aim to collaboratively learn a common decision model from their distributed data. Unlike the conventional FL framework that assumes…

Machine Learning · Computer Science 2023-05-10 Kun Jin , Tongxin Yin , Zhongzhu Chen , Zeyu Sun , Xueru Zhang , Yang Liu , Mingyan Liu

Federated learning (FL) enables collaborative model training among distributed devices without data sharing, but existing FL suffers from poor scalability because of global model synchronization. To address this issue, hierarchical…

Distributed, Parallel, and Cluster Computing · Computer Science 2023-08-22 Tianyu Qi , Yufeng Zhan , Peng Li , Jingcai Guo , Yuanqing Xia

Federated learning (FL) enables collaborative model training across distributed edge devices while preserving data privacy, and typically operates in a round-based synchronous manner. However, synchronous FL suffers from latency bottlenecks…

Machine Learning · Computer Science 2026-03-17 Asaf Goren , Natalie Lang , Nir Shlezinger , Alejandro Cohen

The federated learning (FL) framework enables edge clients to collaboratively learn a shared inference model while keeping privacy of training data on clients. Recently, many heuristics efforts have been made to generalize centralized…

Machine Learning · Computer Science 2022-07-18 Jiayin Jin , Jiaxiang Ren , Yang Zhou , Lingjuan Lyu , Ji Liu , Dejing Dou

Present-day federated learning (FL) systems deployed over edge networks consists of a large number of workers with high degrees of heterogeneity in data and/or computing capabilities, which call for flexible worker participation in terms of…

Machine Learning · Computer Science 2022-06-13 Haibo Yang , Xin Zhang , Prashant Khanduri , Jia Liu

The usage of federated learning (FL) in Vehicular Ad hoc Networks (VANET) has garnered significant interest in research due to the advantages of reducing transmission overhead and protecting user privacy by communicating local dataset…

Machine Learning · Computer Science 2024-01-22 M. Saeid HaghighiFard , Sinem Coleri

Federated Learning (FL) presents a paradigm shift towards distributed model training across isolated data repositories or edge devices without explicit data sharing. Despite of its advantages, FL is inherently less efficient than…

Distributed, Parallel, and Cluster Computing · Computer Science 2024-11-26 M S Chaitanya Kumar , Sai Satya Narayana J , Yunkai Bao , Xin Wang , Steve Drew