A Federated Fine-Tuning Paradigm of Foundation Models in Heterogenous Wireless Networks

• URL: http://arxiv.org/abs/2509.19306v1
• Date: Fri, 05 Sep 2025 06:38:36 GMT
• Title: A Federated Fine-Tuning Paradigm of Foundation Models in Heterogenous Wireless Networks
• Authors: Jingyi Wang, Zhongyuan Zhao, Qingtian Wang, Zexu Li, Yue Wang, Tony Q. S. Quek,
• Abstract summary: Edge devices switch to LoRA modules dynamically for federated fine-tuning with base station to jointly mitigate the impact of heterogeneous transmission.<n>An online optimization algorithm is developed to solve problems with computational complexity.<n>The simulation results on the SST-2 and QNLI data sets demonstrate the performance gains in test accuracy and energy efficiency.
• Score: 43.049216349313575
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Edge intelligence has emerged as a promising strategy to deliver low-latency and ubiquitous services for mobile devices. Recent advances in fine-tuning mechanisms of foundation models have enabled edge intelligence by integrating low-rank adaptation (LoRA) with federated learning. However, in wireless networks, the device heterogeneity and resource constraints on edge devices pose great threats to the performance of federated fine-tuning. To tackle these issues, we propose to optimize federated fine-tuning in heterogenous wireless networks via online learning. First, the framework of switching-based federated fine-tuning in wireless networks is provided. The edge devices switches to LoRA modules dynamically for federated fine-tuning with base station to jointly mitigate the impact of device heterogeneity and transmission unreliability. Second, a tractable upper bound on the inference risk gap is derived based on theoretical analysis. To improve the generalization capability, we formulate a non-convex mixed-integer programming problem with long-term constraints, and decouple it into model switching, transmit power control, and bandwidth allocation subproblems. An online optimization algorithm is developed to solve the problems with polynomial computational complexity. Finally, the simulation results on the SST-2 and QNLI data sets demonstrate the performance gains in test accuracy and energy efficiency.

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