基于专利分析的车辆到车辆通信技术

车辆到车辆通信技术是人类为了避免或减少交通事故而研究的一项技术,其可广泛应用于车辆辅助驾驶系统和智能交通系统等方面,是当前交通领域中比较活跃的一项技术。为了解我国车辆到车辆通信技术的研究现状,加强对车辆到车辆通信技术的专利保护,以历年车辆到车辆通信技术的中国专利申请数据为基础,对历年专利申请数量、主要专利申请人、重要IPC分布进行统计分析,提出专利规避和布局的建议。

智能交通系统中的无线通信技术及其应用

本文从智能交通的设计背景与设计目标出发,归纳总结了当前时代下两种关键的无线通信技术,即传统的通信技术和车辆通信技术。

基于5G的车联网关键技术分析

从车联网系统架构出发,根据第五代移动通信技术(5th generation mobile communication technology,5G)和车联网发展现状,系统分析基于5G的目标感知、车对外界的信息交换(vehicle to everything,V2X)通信、网络切片以及边缘计算和雾计算等关键技术,并分析其中所涉及的非正交多址接入、毫米波、软件定义网络和网络功能虚拟化等技术的研究进展,展望5G车联网的发展趋势。

Performance of beacon safety message dissemination in Vehicular Ad hoc NETworks (VANETs)

Currently, there is a growing belief that putting an IEEE 802.11-like radio into road vehicles can help the drivers to travel more safely. Message dissemination protocols are primordial for safety vehicular applications. There are two types of safety messages which may be exchanged between vehicles: alarm and beacon. In this paper we investigate the feasibility of deploying safety applications based on beacon message dissemination through extensive simulation study and pay special attention to the safety requirements. Vehicles are supposed to issue these messages periodically to announce to other vehicles their current situation and use received messages for preventing possible unsafe situations. We evaluate the performance of a single-hop dissemination protocol while taking into account the quality of service (QoS) metrics like delivery rate and delay. We realize that reliability is the main concern in beacon message dissemination. Thus, a new metric named effective range is defined which gives us more accurate facility for evaluating QoS in safety applications specifically. Then, in order to improve the performance, the effects of three parameters including vehicle's transmission range, message transmission's interval time and message payload size are studied. Due to special characteristics of the safety applications, we model the relationship between communication-level QoS and application-level QoS and evaluate them for different classes of safety applications. As a conclusion, the current technology of IEEE 802.11 MAC layer has still some challenges for automatic safety applications but it can provide acceptable QoS to driver assistance safety applications.

An Overview of Internet of Vehicles

The new era of the Internet of Things is driving the evolution of conventional Vehicle Ad-hoc Networks into the lnternet of Vehicles （IoV）. With the rapid development of computation and communication technologies, loV promises huge commercial interest and research value, thereby attracting a large number of companies and researchers. This paper proposes an abstract network model of the IoV, discusses the technologies required to create the IoV, presents different applications based on certain currently existing technologies, provides several open research challenges and describes essential future research in the area of loV.

Intelligent Transportation System and Night Delivery Schemes for City Logistics

Intelligent Transportation System （ITS） integrates information and communication technologies with location based technologies into roads, vehicles, traffic and transport management systems. Application of ITS can improve situation in major cities where due to the increasing number of residents and level of motorization traffic congestion represents important issue. Another problem arises from this facts and that is that cities have contradictory needs as grooving need for goods within urban areas as well as need for less vehicles in the same area. The urban logistics activities by private companies within urban areas represent an integral part of city logistics that aims to improve the efficiency of urban freight transportation, reduce traffic congestion, mitigate environmental impacts, reduce costs and fuel consumption. This research presents application of ITS technologies and vehicle routing problem for night delivery scheme planning as one of the core techniques for modelling city logistics.