Adaptive Joint Compression and Synchronisation in Federated Split Learning for IoT Rainfall Prediction
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Abstract (arXiv)
Federated split learning (FSL) enables collaborative training across bandwidth-constrained IoT devices, but repeated activation and gradient exchange creates a communication bot-tleneck. Prior work optimises either activation compression or synchronisation frequency in isolation. This paper presents an FSL framework for IoT rainfall prediction that jointly regulates activation compression and the synchronisation interval rho via a latency driven scheduler on a server with per client EMA smoothing. The system is evaluated on hourly ERA5 data from 11 weather stations through a 17 scenario simulation matrix and a four scenario Raspberry Pi deployment over a real wide-area link. The simulation matrix validates scheduler switching across low, high, and mixed latency profiles, while the Pi deployment validates the high latency endpoint selected by the same policy. AUPRC varies only slightly across configurations (0.6381-0.6484 in simulation; within 0.011 on Pi), indicating that aggressive quantisation and sparser aggregation do not materially degrade predictive quality in this setting. On Pi, the selected endpoint (int8 with rho=3) achieves an 87% reduction in activation upload payload and a 54% reduction in synchronisation traffic relative to the float32 baseline, while reducing runtime jitter from +/-688 s to +/-10 s.
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References · 11
- 2016Communication-Efficient Learning of Deep Networks from Decentralized Datacited by 7,592
- 2019Advances and Open Problems in Federated Learningcited by 3,021
- 2019On the Convergence of FedAvg on Non-IID Datacited by 1,220
- 2018Split learning for health: Distributed deep learning without sharing raw patient datacited by 391
- 2020SplitFed: When Federated Learning Meets Split Learningcited by 308
- 2021Federated Learning with Buffered Asynchronous Aggregationcited by 188
- 2024Federated Split Learning with Model Pruning and Gradient Quantization in Wireless Networkscited by 7
- 2025SL-ACC: A Communication-Efficient Split Learning Framework with Adaptive Channel-wise Compressioncited by 6
- 2024SplitFedZip: Learned Compression for Data Transfer Reduction in Split-Federated Learningcited by 4
- 2026SplitCom: Communication-efficient Split Federated Fine-tuning of LLMs via Temporal Compressioncited by 4
- 2026SL-FAC: A Communication-Efficient Split Learning Framework with Frequency-Aware Compressioncited by 1
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