[论文解读] Enhancing Vulnerable Road User Safety: A Survey of Existing Practices and Consideration for Using Mobile Devices for V2X Connections

Nishanthi Dasanayaka, Khondokar Fida Hasan+2 more|arXiv (Cornell University)|Oct 29, 2020

Vehicular Ad Hoc Networks (VANETs)参考文献 52被引用 14

一句话总结

本文提出了一种基于智能手机的车辆到弱势道路使用者（V2VRU）通信系统，利用4G/5G移动宽带（MBB）实现车辆与行人、骑行人等弱势道路使用者之间的双向、实时安全警报。通过采用C-ITS标准和移动边缘计算（MEC），该系统提升了情境感知能力并降低了碰撞风险，解决了当前单向V2X解决方案的局限性。

ABSTRACT

Vulnerable road users (VRUs) such as pedestrians, cyclists and motorcyclists are at the highest risk in the road traffic environment. Globally, over half of road traffic deaths are vulnerable road users. Although substantial efforts are being made to improve VRU safety from engineering solutions to law enforcement, the death toll of VRUs' continues to rise. The emerging technology, Cooperative Intelligent Transportation System (C-ITS), has the proven potential to enhance road safety by enabling wireless communication to exchange information among road users. Such exchanged information is utilized for creating situational awareness and detecting any potential collisions in advance to take necessary measures to avoid any possible road casualties. The current state-of-the-art solutions of C-ITS for VRU safety, however, are limited to unidirectional communication where VRUs are only responsible for alerting their presence to drivers with the intention of avoiding collisions. This one-way interaction is substantially limiting the enormous potential of C-ITS which otherwise can be employed to devise a more effective solution for the VRU safety where VRU can be equipped with bidirectional communication with full C-ITS functionalities. To address such problems and to explore better C-ITS solution suggestions for VRU, this paper reviewed and evaluated the current technologies and safety methods proposed for VRU safety over the period 2007-2020. Later, it presents the design considerations for a cellular-based Vehicle-to-VRU (V2VRU) communication system along with potential challenges of a cellular-based approach to provide necessary recommendations.

研究动机与目标

• 为应对全球弱势道路使用者（VRU）死亡人数持续上升的问题，其占比超过所有交通事故死亡人数的50%。
• 识别当前单向V2X系统存在的局限性，即仅允许VRU发送警报，无法接收安全信息。
• 提出一种基于4G/5G MBB和C-ITS标准的双向、智能手机为基础的V2VRU通信框架。
• 分析在移动宽带网络上部署V2VRU系统的各项技术挑战。
• 推荐使用移动边缘计算（MEC）和中间件等解决方案，以支持实时安全应用的互操作性。

提出的方法

• 设计一种基于智能手机的V2VRU系统架构，利用4G/5G移动宽带（MBB）实现双向通信。
• 应用C-ITS标准和用例，定义VRU安全通信的需求。
• 引入移动边缘计算（MEC），通过将计算任务卸载至边缘服务器，降低延迟和功耗。
• 在边缘节点采用发布-处理-订阅通信模型，实现实时安全警告的高效分发。
• 提出一种双技术路边单元（RSU）中间件，实现DSRC与蜂窝V2X系统之间的互操作性。
• 使用标准化的V2X消息格式，在延迟、可靠性和可扩展性约束下评估系统性能。

实验结果

研究问题

• RQ1 如何利用现有移动宽带基础设施有效实现双向V2VRU通信？
• RQ2 在4G/5G MBB网络上部署V2VRU系统以支持实时安全应用时，面临哪些关键技术挑战？
• RQ3 移动边缘计算（MEC）如何提升基于智能手机的V2VRU系统的延迟性能和能效？
• RQ4 中间件在实现异构V2X技术（如DSRC与蜂窝V2X）之间互操作性方面发挥什么作用？
• RQ5 C-ITS标准如何支持可扩展且安全的V2VRU通信系统设计？

主要发现

• 当前针对VRU安全的C-ITS解决方案大多为单向通信，限制了其有效性，因为VRU仅能发送警报，无法接收安全信息。
• 基于4G/5G MBB的智能手机V2VRU通信在技术上是可行的，并可通过优化系统架构支持实时安全警告。
• 移动边缘计算（MEC）通过将数据处理任务卸载至边缘服务器，显著降低了通信延迟和设备功耗。
• 在边缘节点采用的发布-处理-订阅模型，能够实现可扩展且低延迟的安全警告分发，面向订阅用户。
• 通过配备中间件的RSU，可在DSRC与蜂窝V2X系统之间实现互操作性，实现标准间的转码。
• 标准化接口和消息格式对于确保V2VRU部署中跨厂商兼容性和系统整体可靠性至关重要。