arXiv AI By Yin-Kuan Liang (Durham University), Yan Gao (University of Cambridge), Yang Long (Durham University)

LFHE: Local-First Heuristic Evolution for Bounded Local Topology Search in Decentralized Learning with Non-IID Data

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arXiv AI
Oct 9

Population Scaling or Data Dilution? Dynamics of Local Topology Evolution in Decentralized Learning

The paper investigates how scaling the number of clients in decentralized learning affects information propagation, consensus, and accuracy. By comparing a degree‑two Ring, a Static Random graph, and a locally adaptive Local‑First Heuristic Evolution (LFHE) topology on CIFAR‑10, the authors show that the Ring’s spectral gap decays as Θ(N⁻²), leading to slower convergence and higher disagreement. Experiments reveal that keeping local dataset size constant mitigates population penalties, and that LFHE can improve accuracy and consensus at the cost of increased communication.

By Yin-Kuan Liang, Yan Gao, Yang Long
arXiv AI
4d ago

Connectivity-Aware Client Selection in Decentralized Federated Learning

The paper introduces connectivity-aware client selection for decentralized federated learning, using spectral graph tools to choose a subset of structurally relevant neighbors for each client. By leveraging eigenvector embeddings and heat/diffusion kernel similarities, the method reduces communication overhead while maintaining or improving accuracy compared to uniform subsampling and full broadcasting. Experiments show up to a 3‑percentage‑point accuracy gain under strong data heterogeneity and a 50% reduction in transmitted messages.

By Usevalad Milasheuski, Monica Nicoli, Stefano Savazzi
arXiv Machine Learning
Jul 7

Air-Plan: Query-Optimized Topology Selection for Over-the-Air Decentralized Federated Learning

arXiv:2607. 04254v1 Announce Type: cross Abstract: Over-the-air (OTA) aggregation exploits the superposition property of wireless multiple-access channels to aggregate model updates from multiple devices within a single transmission slot, significantly reducing communication latency.

By Kaushal Attaluri, Rebeca P. Diaz-Redondo, Manuel Fernandez Veiga