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This paper presents a hierarchical federated learning (FL) framework that extends the alternating direction method of multipliers (ADMM) with smoothing techniques, tailored for non-convex and non-smooth objectives. Unlike traditional…

Machine Learning · Computer Science 2025-03-13 Reza Mirzaeifard , Stefan Werner

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

Clustering, like covariate selection for classification, is an important step to compress and interpret the data. However, clustering of covariates is often performed independently of the classification step, which can lead to undesirable…

Computation · Statistics 2020-04-08 Daniel Andrade , Kenji Fukumizu , Yuzuru Okajima

Federated learning is a distributed machine learning technology, which realizes the balance between data privacy protection and data sharing computing. To protect data privacy, feder-ated learning learns shared models by locally executing…

Machine Learning · Computer Science 2023-06-26 Tianyu Zhao , Junping Du , Yingxia Shao , Zeli Guan

Personalised federated learning (FL) aims at collaboratively learning a machine learning model taylored for each client. Albeit promising advances have been made in this direction, most of existing approaches works do not allow for…

Machine Learning · Computer Science 2023-01-30 Nikita Kotelevskii , Maxime Vono , Eric Moulines , Alain Durmus

Clustered Federated Learning (CFL) improves performance under non-IID client heterogeneity by clustering clients and training one model per cluster, thereby balancing between a global model and fully personalized models. However, most CFL…

Machine Learning · Computer Science 2026-01-30 Mariona Jaramillo-Civill , Peng Wu , Pau Closas

Federated learning (FL) is a promising framework that models distributed machine learning while protecting the privacy of clients. However, FL suffers performance degradation from heterogeneous and limited data. To alleviate the…

Machine Learning · Computer Science 2023-03-09 Xu Zhang , Wenpeng Li , Yunfeng Shao , Yinchuan Li

In a distributed machine learning setting like Federated Learning where there are multiple clients involved which update their individual weights to a single central server, often training on the entire individual client's dataset for each…

Machine Learning · Computer Science 2025-11-04 Prateek Chanda , Shrey Modi , Ganesh Ramakrishnan

Personalized Federated Learning (PFL) aims to train customized models for clients with highly heterogeneous data distributions while preserving data privacy. Existing approaches often rely on heuristics like clustering or model…

Artificial Intelligence · Computer Science 2026-03-13 Ping Guo , Tiantian Zhang , Xi Lin , Xiang Li , Zhi-Ri Tang , Qingfu Zhang

This paper studies the problem of model training under Federated Learning when clients exhibit cluster structure. We contextualize this problem in mixed regression, where each client has limited local data generated from one of $k$ unknown…

Machine Learning · Computer Science 2022-06-16 Lili Su , Jiaming Xu , Pengkun Yang

Personalized Federated Learning (PFL) enables a collection of agents to collaboratively learn individual models without sharing raw data. We propose a new PFL approach in which each agent optimizes a weighted combination of all agents'…

Machine Learning · Computer Science 2026-03-04 Jean-Baptiste Fermanian , Batiste Le Bars , Aurélien Bellet

We propose a new training algorithm, named DualFL (Dualized Federated Learning), for solving distributed optimization problems in federated learning. DualFL achieves communication acceleration for very general convex cost functions, thereby…

Machine Learning · Computer Science 2024-01-11 Jongho Park , Jinchao Xu

A distinguishing characteristic of federated learning is that the (local) client data could have statistical heterogeneity. This heterogeneity has motivated the design of personalized learning, where individual (personalized) models are…

Machine Learning · Computer Science 2022-07-06 Kaan Ozkara , Antonious M. Girgis , Deepesh Data , Suhas Diggavi

Federated learning (FL), which is a decentralized machine learning (ML) approach, often incorporates differential privacy (DP) to provide rigorous data privacy guarantees. Previous works attempted to address high structured data…

Machine Learning · Computer Science 2025-04-30 Saber Malekmohammadi , Afaf Taik , Golnoosh Farnadi

Federated learning (FL) is an emerging machine learning paradigm that allows to accomplish model training without aggregating data at a central server. Most studies on FL consider a centralized framework, in which a single server is endowed…

Machine Learning · Computer Science 2023-03-22 Bin Wang , Jun Fang , Hongbin Li , Xiaojun Yuan , Qing Ling

Federated learning (FL) is a decentralized and privacy-preserving machine learning technique in which a group of clients collaborate with a server to learn a global model without sharing clients' data. One challenge associated with FL is…

Machine Learning · Computer Science 2022-01-27 Canh T. Dinh , Nguyen H. Tran , Tuan Dung Nguyen

This paper proposes LCFL, a novel clustering metric for evaluating clients' data distributions in federated learning. LCFL aligns with federated learning requirements, accurately assessing client-to-client variations in data distribution.…

Machine Learning · Computer Science 2024-07-15 Endong Gu , Yongxin Chen , Hao Wen , Xingju Cai , Deren Han

In many applications, multiple parties have private data regarding the same set of users but on disjoint sets of attributes, and a server wants to leverage the data to train a model. To enable model learning while protecting the privacy of…

Cryptography and Security · Computer Science 2023-04-03 Zitao Li , Tianhao Wang , Ninghui Li

Network models provide a powerful and flexible framework for analyzing a wide range of structured data sources. In many situations of interest, however, multiple networks can be constructed to capture different aspects of an underlying…

Social and Information Networks · Computer Science 2021-11-03 Madeline Navarro , Genevera I. Allen , Michael Weylandt

Federated Learning (FL) is a setting where multiple parties with distributed data collaborate in training a joint Machine Learning (ML) model while keeping all data local at the parties. Federated clustering is an area of research within FL…

Machine Learning · Computer Science 2022-01-20 Morris Stallmann , Anna Wilbik