用高频卫星定位数据,在边缘设备上分类道路用户。
Road User Classification from High-Frequency GNSS Data Using Distributed Edge Intelligence
- 用LSTM处理高频率位置序列,实现道路用户分类。
- 两到四分钟数据可准确区分机动车类型。
- 无需昂贵传感器,适合分布式智能交通系统。
真实交通包含从行人到重型卡车的多样道路使用者,有效分类对智能交通系统应用至关重要。传统方法依赖侵入性或昂贵的外部传感器,且覆盖范围有限。为此,本文提出一种无侵入、低成本的替代方案,利用1-2赫兹的高频位置序列进行道路用户分类。尽管5G定位技术具潜力,但尚未在户外实现。本研究基于真实环境下通过全球导航卫星系统(GNSS)采集的位置数据,在分布式边缘设备上处理。初始阶段区分四类道路使用者:行人、骑行者、摩托车和乘用车。相较传统统计方法,本文采用长短期记忆(LSTM)递归神经网络作为分类主干,因其在处理序列数据方面处于前沿。提出基于原始位置序列提取运动特征的RNN架构,并分析序列长度对分类性能的影响。结果表明,该方法可在分布式设备上高效分类道路用户,尤其能基于2至4分钟序列准确区分各类机动车辆。
原文摘要 · Abstract (English)
Real-world traffic involves diverse road users, ranging from pedestrians to heavy trucks, necessitating effective road user classification for various applications within Intelligent Transport Systems (ITS). Traditional approaches often rely on intrusive and/or expensive external hardware sensors. These systems typically have limited spatial coverage. In response to these limitations, this work aims to investigate an unintrusive and cost-effective alternative for road user classification by using high-frequency (1-2 Hz) positional sequences. A cutting-edge solution could involve leveraging positioning data from 5G networks. However, this feature is currently only proposed in the 3GPP standard and has not yet been implemented for outdoor applications by 5G equipment vendors. Therefore, our approach relies on positional data, that is recorded under real-world conditions using Global Navigation Satellite Systems (GNSS) and processed on distributed edge devices. As a start-ing point, four types of road users are distinguished: pedestri-ans, cyclists, motorcycles, and passenger cars. While earlier approaches used classical statistical methods, we propose Long Short-Term Memory (LSTM) recurrent neural networks (RNNs) as the preferred classification method, as they repre-sent state-of-the-art in processing sequential data. An RNN architecture for road user classification, based on selected motion characteristics derived from raw positional sequences is presented and the influence of sequence length on classifica-tion quality is examined. The results of the work show that RNNs are capable of efficiently classifying road users on dis-tributed devices, and can particularly differentiate between types of motorized vehicles, based on two- to four-minute se-quences.
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