arXiv:2506.10699eess.IVcs.LG2025-06被引 2

自适应调整网络结构与资源分配,提升低算力设备的图像分类性能。

SNR and Resource Adaptive Deep JSCC for Distributed IoT Image Classification

  • 基于智能遗传算法动态优化模型配置,适配不同信噪比和算力限制。
  • 在-10dB低信噪比下,准确率比现有方法提升10%(算力1M~70M FLOPs)。
  • 适合边缘计算中资源受限、信道不稳定的物联网图像识别场景。

基于传感器的物联网设备本地推理面临严重计算限制,通常需将数据通过噪声信道传输至服务器处理。为此,采用基于分层深度神经网络(DNN)的联合源信道编码(JSCC)方案,提取并传输关键特征而非原始数据。然而,现有方法多依赖固定网络分割和静态配置,难以适应变化的计算预算与信道条件。本文提出一种新型的信噪比(SNR)与计算自适应分布式卷积神经网络框架,用于无线环境下的物联网图像分类。引入学习辅助智能遗传算法(LAIGA),在给定浮点运算次数(FLOPs)约束和特定信噪比下,高效搜索卷积神经网络超参数空间以优化网络配置。LAIGA能智能剔除超出设备计算预算的不可行配置,并利用随机森林学习机制减少对超参数空间的全量探索,引导生成具有应用特异性偏好的候选最优配置。实验表明,所提框架在低信噪比与有限计算资源条件下显著优于固定分割架构及现有自适应方法。在-10dB信噪比下,跨1M至70M FLOPs算力范围,分类准确率相较现有基于JSCC的多层自适应框架提升10%。

原文摘要 · Abstract (English)

Sensor-based local inference at IoT devices faces severe computational limitations, often requiring data transmission over noisy wireless channels for server-side processing. To address this, split-network Deep Neural Network (DNN) based Joint Source-Channel Coding (JSCC) schemes are used to extract and transmit relevant features instead of raw data. However, most existing methods rely on fixed network splits and static configurations, lacking adaptability to varying computational budgets and channel conditions. In this paper, we propose a novel SNR- and computation-adaptive distributed CNN framework for wireless image classification across IoT devices and edge servers. We introduce a learning-assisted intelligent Genetic Algorithm (LAIGA) that efficiently explores the CNN hyperparameter space to optimize network configuration under given FLOPs constraints and given SNR. LAIGA intelligently discards the infeasible network configurations that exceed computational budget at IoT device. It also benefits from the Random Forests based learning assistance to avoid a thorough exploration of hyperparameter space and to induce application specific bias in candidate optimal configurations. Experimental results demonstrate that the proposed framework outperforms fixed-split architectures and existing SNR-adaptive methods, especially under low SNR and limited computational resources. We achieve a 10\% increase in classification accuracy as compared to existing JSCC based SNR-adaptive multilayer framework at an SNR as low as -10dB across a range of available computational budget (1M to 70M FLOPs) at IoT device.

边缘计算自适应模型物联网联合编码

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