Information Systems Department, Faculty of Computers and Information, Mansoura University, Mansoura, Egypt.
PLoS One. 2021 Nov 18;16(11):e0259060. doi: 10.1371/journal.pone.0259060. eCollection 2021.
Vehicular ad-hoc networks (VANETs) address a steadily expanding demand, particularly for public emergency applications. Real-time localization of destination vehicles is important for determining the route to deliver messages. Existing location administration services in VANETs are classified as flooding-based, flat-based, and geographic-based location services. Existing localization techniques suffer from network disconnection and overloading because of 5G VANET topology changes. 5G VANETs have low delay and support time-sensitive applications. A traffic light-inspired location service (TLILS) is proposed to manage localization inspired by traffic lights. The proposed optimized localization service uses roadside units (RSUs) as location servers. RSUs with the maximum traffic weight metrics were chosen. Traffic weight metrics are based on speed of vehicles, connection time and density of neighboring vehicles. The proposed TLILS outperforms both Name-ID Hybrid Routing (NIHR) and Zoom-Out Geographic Location Service (ZGLS) for packet delivery ratio (PDR) and delay. TLILSs guarantee the highest PDR (0.96) and the shortest end-to-end delay (0.001 s) over NIHR and ZGLS.
车联网(VANETs)满足了不断增长的需求，特别是对公共紧急应用的需求。目的车辆的实时定位对于确定传递消息的路线很重要。VANET 中的现有位置管理服务分为基于泛洪、基于平面和基于地理的位置服务。现有的定位技术由于 5G VANET 拓扑变化而受到网络中断和过载的影响。5G VANET 具有低延迟并支持对时间敏感的应用。提出了一种受交通信号灯启发的位置服务(TLILS)，以管理受交通信号灯启发的本地化。所提出的优化定位服务使用路边单元(RSU)作为位置服务器。选择了具有最大流量权重指标的 RSU。流量权重指标基于车辆速度、连接时间和相邻车辆的密度。所提出的 TLILS 在数据包投递率(PDR)和延迟方面均优于名称-ID 混合路由(NIHR)和缩小地理定位服务(ZGLS)。TLILS 保证了最高的 PDR(0.96)和最短的端到端延迟(0.001 s)，超过了 NIHR 和 ZGLS。
