论文标题
基于802.11的V2V网络的信息的联合年龄和自我风险评估
Joint Age of Information and Self Risk Assessment for Safer 802.11p based V2V Networks
论文作者
论文摘要
新兴的802.11p车辆到车辆（V2V）网络依赖于定期的基本安全消息（BSM）来传播时间敏感的关键安全信息，例如车辆位置，速度和标题 - 可实现多个安全应用程序，并有可能提高公路安全性。由于流动性，缺乏全球知识和有限的沟通资源，设计最佳的BSM广播费率控制协议是具有挑战性的。最近，最小化信息年龄（AOI）在设计BSM广播速率控制方案方面已获得动力。在本文中，我们表明，最大程度地减少AOI并不总是提高V2V网络的安全性。具体而言，我们提出了一种新颖的指标，称为可跟踪性的信息年龄，除了AOI外，还考虑了对车辆的自我风险评估，并根据自我跟踪错误（自我TE）进行了量化，这表明车辆构成了碰撞风险。自我定义为特定车辆的实际位置与其自估计位置之间的差异。我们的广泛实验基于NS-3模拟器之上的现实相扑交通痕迹，表明，基于TAOI的速率协议在所有被认为是V2V设置中，基于安全性能的基线速率大于基线基线速率协议和违约$ 10 $ Hz广播率，即碰撞风险。
Emerging 802.11p vehicle-to-vehicle (V2V) networks rely on periodic Basic Safety Messages (BSMs) to disseminate time-sensitive safety-critical information, such as vehicle position, speed, and heading -- that enables several safety applications and has the potential to improve on-road safety. Due to mobility, lack of global-knowledge and limited communication resources, designing an optimal BSM broadcast rate-control protocol is challenging. Recently, minimizing Age of Information (AoI) has gained momentum in designing BSM broadcast rate-control protocols. In this paper, we show that minimizing AoI solely does not always improve the safety of V2V networks. Specifically, we propose a novel metric, termed Trackability-aware Age of Information TAoI, that in addition to AoI, takes into account the self risk assessment of vehicles, quantified in terms of self tracking error (self-TE) -- which provides an indication of collision risk posed by the vehicle. Self-TE is defined as the difference between the actual location of a certain vehicle and its self-estimated location. Our extensive experiments, based on realistic SUMO traffic traces on top of ns-3 simulator, demonstrate that TAoI based rate-protocol significantly outperforms baseline AoI based rate protocol and default $10$ Hz broadcast rate in terms of safety performance, i.e., collision risk, in all considered V2V settings.
