Parameter Tracking in Federated Learning with Adaptive Optimization

• URL: http://arxiv.org/abs/2502.02727v2
• Date: Sat, 08 Feb 2025 14:01:17 GMT
• Title: Parameter Tracking in Federated Learning with Adaptive Optimization
• Authors: Evan Chen, Jianing Zhang, Shiqiang Wang, Chaoyue Liu, Christopher Brinton,
• Abstract summary: In Federated Learning (FL), model training performance is strongly impacted by data heterogeneity across clients. Gradient Tracking (GT) has recently emerged as a solution which mitigates this issue by introducing correction terms to local model updates. To date, GT has only been considered under Gradient (SGD)-based model Descent training, while modern FL frameworks increasingly employ adaptives for improved convergence.
• Score: 14.111863825607001
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• Abstract: In Federated Learning (FL), model training performance is strongly impacted by data heterogeneity across clients. Gradient Tracking (GT) has recently emerged as a solution which mitigates this issue by introducing correction terms to local model updates. To date, GT has only been considered under Stochastic Gradient Descent (SGD)-based model training, while modern FL frameworks increasingly employ adaptive optimizers for improved convergence. In this work, we generalize the GT framework to a more flexible Parameter Tracking (PT) paradigm and propose two novel adaptive optimization algorithms, {\tt FAdamET} and {\tt FAdamGT}, that integrate PT into Adam-based FL. We provide a rigorous convergence analysis of these algorithms under non-convex settings. Our experimental results demonstrate that both proposed algorithms consistently outperform existing methods when evaluating total communication cost and total computation cost across varying levels of data heterogeneity, showing the effectiveness of correcting first-order information in federated adaptive optimization.

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