用神经形态传感实现低功耗在线异常检测,实时控错率。
Online Reliable Anomaly Detection via Neuromorphic Sensing and Communications
- 事件驱动传感+脉冲通信,仅在变化时发送信号。
- 在线检验控错率低于设定阈值,延迟低、省电。
- 适合脑机接口和远程环境监测等场景。
本文提出一种基于神经形态无线传感器网络的低功耗在线异常检测框架,适用于脑机接口和远程环境监测等场景。系统中,中心读取节点在每个时间帧主动查询部分神经形态传感器节点(neuro-SNs)。这些传感器为事件驱动,仅在监测系统发生相关变化时产生脉冲信号。被查询的neuro-SNs通过脉冲无线电(IR)直接编码本地事件进行响应。读取节点处理这些事件驱动信号,判断环境是否异常,并严格控制检测的假发现率(FDR)低于预设阈值。该方法采用基于e-value的在线假设检验,在无需知晓异常率的前提下实现FDR控制,并将传感器查询策略优化建模为多臂赌博机中的最优臂识别问题。大量性能评估表明,该方法在严苛的FDR要求下仍能可靠检测异常,同时高效调度通信并实现低检测延迟。
原文摘要 · Abstract (English)
This paper proposes a low-power online anomaly detection framework based on neuromorphic wireless sensor networks, encompassing possible use cases such as brain-machine interfaces and remote environmental monitoring. In the considered system, a central reader node actively queries a subset of neuromorphic sensor nodes (neuro-SNs) at each time frame. The neuromorphic sensors are event-driven, producing spikes in correspondence to relevant changes in the monitored system. The queried neuro-SNs respond to the reader with impulse radio (IR) transmissions that directly encode the sensed local events. The reader processes these event-driven signals to determine whether the monitored environment is in a normal or anomalous state, while rigorously controlling the false discovery rate (FDR) of detections below a predefined threshold. The proposed approach employs an online hypothesis testing method with e-values to maintain FDR control without requiring knowledge of the anomaly rate, and it dynamically optimizes the sensor querying strategy by casting it as a best-arm identification problem in a multi-armed bandit framework. Extensive performance evaluation demonstrates that the proposed method can reliably detect anomalies under stringent FDR requirements, while efficiently scheduling sensor communications and achieving low detection latency.
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