提出轻量级框架MOELO,同时应对设备差异和环境变化带来的定位挑战。
Unified Class and Domain Incremental Learning with Mixture of Experts for Indoor Localization
- 用专家混合架构按区域增量训练,通过高效路由机制选择专家。
- 在多建筑、多设备上实现定位误差降低25.6倍,遗忘减少21.5倍。
- 适合资源受限的移动设备,适用于长期动态变化的室内定位场景。
基于机器学习的室内定位因位置服务需求增长而受到关注,但其长期可靠性受移动设备软硬件差异影响,导致输入分布偏移引发领域漂移。此外,室内环境演变会随时间引入新位置,扩大输出空间造成类别漂移,使静态模型失效。为此,我们提出首个统一处理领域增量与类别增量学习的持续学习框架MOELO。该框架采用专家混合结构,各区域专家增量训练,并通过等角紧框架门控机制实现高效路由,保证低延迟推理与紧凑模型体积。实验表明,MOELO在多种建筑、设备和学习场景下,相较现有最优方法,平均定位误差降低25.6倍,最差情况误差降低44.5倍,遗忘程度减少21.5倍。
原文摘要 · Abstract (English)
Indoor localization using machine learning has gained traction due to the growing demand for location-based services. However, its long-term reliability is hindered by hardware/software variations across mobile devices, which shift the model's input distribution to create domain shifts. Further, evolving indoor environments can introduce new locations over time, expanding the output space to create class shifts, making static machine learning models ineffective over time. To address these challenges, we propose a novel unified continual learning framework for indoor localization called MOELO that, for the first time, jointly addresses domain-incremental and class-incremental learning scenarios. MOELO enables a lightweight, robust, and adaptive localization solution that can be deployed on resource-limited mobile devices and is capable of continual learning in dynamic, heterogeneous real-world settings. This is made possible by a mixture-of-experts architecture, where experts are incrementally trained per region and selected through an equiangular tight frame based gating mechanism ensuring efficient routing, and low-latency inference, all within a compact model footprint. Experimental evaluations show that MOELO achieves improvements of up to 25.6x in mean localization error, 44.5x in worst-case localization error, and 21.5x lesser forgetting compared to state-of-the-art frameworks across diverse buildings, mobile devices, and learning scenarios.
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