A minimum bandwidth occupation mechanism for collision avoidance system
首发时间:2021-01-22
Abstract:Collision avoidance as an essential use case for vehicular networks can effectively enhance the safety of vehicles. This paper addresses how to avoid collision between vehicles and vulnerable road users(VRU), i.e., pedestrians, cyclists or motorists equipped with smartphones. Due to the limited computation resource and processing capability of smartphones, mobile edge computing (MEC) is introduced. MEC is utilized to reduce the transmission delay and relieve the network congestion, by pushing computation resource and processing capability to network edge. In particular, this paper focuses on a collision avoidance scenario including an edge collision detector, multiple vehicles and VRUs. In addition, we propose a minimum bandwidth occupation algorithm for collision warning. By calculating the consumed bandwidth of two different candidate alerting methods, we are able to decide the most efficient way, which occupates minimum bandwidth, to avoid the colliison.
keywords: Vehicle-to-Everything Collision Avoidance Mobile Edge Computing Vulnerable Road User Bandwidth Occupation
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面向车联网避撞场景的最小带宽占用机制研究
摘要:车辆避障是车联网的一个重要用例,它可以有效地提高车辆的安全性。众所周知,随着经济的快速发展,城市道路上的车辆越来越多,这导致了更多的交通事故。本文主要聚焦于车辆与弱势道路使用者(VRU)之间的避障。其中,弱势道路使用者包括配备了智能手机地行人,骑自行车或摩托车的人。另外,鉴于智能手机有限的计算资源和处理能力,我们引入了移动边缘计算(MEC)。利用MEC,将计算资源和处理能力迁移到网络边缘,这可以明显地降低传输时延,缓解网络拥塞。本文重点研究的是一个集合了边缘碰撞检测器、多个车辆和弱势道路使用者(VRU)的碰撞规避场景。同时,本文也提出了一种最小带宽占用的碰撞预警算法。通过香农公式推导算出两种预警方式各自占用的带宽,而后选择一种耗用带宽最小的下发方式。
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