由国外DSRC标准看国内发展状况

车联网按照规定的数据交互标准和通信协议,实现V2X的数据交互和共享.专用短程通信是一种高效的无线通信技术,它可以实现小范围内数据的实时、准确和可靠的双向传输,将车辆和道路有机地连接.本文介绍了美、欧、日的车载通信标准的发展状况,并进行对比分析,然后从美、欧、日的标准谈国内车联网系统、标准制定以及车联网标准体系的建立,并深入研究分析DSRC的特点,为我国制定车联网系统以及车载通信标准发展战略提供参考依据;最后,展望了车联网行业的发展前景.     

车联网安全监管策略研究

车联网作为信息化与工业化深度融合的重要领域,对促进汽车、交通、信息通信产业的融合和升级,对相关产业生态和价值链体系的重塑具有重要意义。当前伴随车联网智能化和网联化进程的不断推进,车联网网络安全形势日趋严峻。安全作为关系到车联网能否快速发展的重要因素,是车联网健康发展的基础和保障。在此背景下,通过梳理分析当前我国车联网安全监管面临的需求、现状与不足,提出适应我国车联网发展的安全监管对策。     

车联网极低时延与高可靠通信:现状与展望

随着第五代移动通信技术的不断发展,智能交通系统的建设已成为智慧城市建设进程中非常重要的环节,车联网又是智能交通系统中必不可少的组成部分。目前全球汽车使用量急剧上升,为提升人们出行体验,实现车、路、人以及基础设施之间的信息交互,需要一个具备高速大带宽以及高可靠低时延的通信（Ultra-Reliable Low-Latency Communication ,URLLC）网络支撑。而目前基于LTE技术的车联网不能满足URLLC的性能需求,因此提升车联网URLLC的性能成为车联网技术研究的重点。本论文回顾了车联网技术标准的发展历程,对URLLC在车联网应用场景的性能需求进行分析,并对提升车联网高可靠性和极低时延的研究方法进行总结。      

车联网产业融合创新打造数字经济新空间

车联网是新一代信息通信网络、智能网联汽车、智慧交通等行业融合的战略性新兴产业,更是先进制造业和现代服务业深度融合的新业态。车联网产业融合创新发展对于落实制造强国、网络强国和交通强国具有重要作用,对推动我国数字经济发展具有重要意义。习近平总书记多次对车联网相关工作作出重要指示,“十四五”规划也明确提出了“积极稳妥发展车联网”,为车联网产业融合创新发展提出了新指导、新要求和新方向。     

对我国车联网发展的思考

作为当今汽车工业和无线通信领域新宠,车联网引起了全球广泛关注。本文概述了车联网及其特征,介绍了美国、日本等一些国家车联网应用发展的情况,分析了车联网发展面临的问题,对我国车联网产业发展进行了探讨,并展望了未来车联网时代的生活。     

车联网产业融合发展趋势

从通信技术的演进入手,研究了通信技术支持自动驾驶的能力特征,给出了车联网服务升级的趋势以及国内外政策情况,分析了我国车联网政策和产业取得的重大突破和良好的发展环境。最后,总结了车联网产业融合、加速发展的趋势。     

车联网专用短程通信标准与频谱安全评析

0 前言 车联网作为物联网的重要分支,为无线通信业带来了广阔舞台,尤其是车载短程无线通信是车联网实现安全行车的关键所在,选择何种标准与频段,成为我国建设车载短程无线通信的重要环节。     

基于RFID技术的车联网应用及构建分析

本文通过对车联网及其关键技术RFID的基本概念进行介绍,结合RFID技术在车联网中的一些应用,对基于RFID技术的车联网的构建、工作原理以及具体应用实例进行分析研究,提出后期可能遇到的瓶颈问题。     

车联网路侧系统信息安全机制与技术

以网联化为基础的车路协同技术路线逐渐成为未来车联网发展的全球共识，也是我国交通强国战略规划的重要组成部分。车联网路侧系统（路侧基础设施）作为车联网重要基础设施，相较于传统的互联网系统，更容易遭受到网络攻击。在车路协同应用中，身份伪造、终端非法接入、数据拦截、隐私信息泄露等情况的出现，不仅可能造成企业经济损失和个人隐私泄露，还可能威胁人身安全，甚至引发危害国家利益的公共安全问题。然而目前暂无针对此类安全隐患的车联网路侧设施安全体系的标准规范，也缺乏对路侧系统网络通信安全、数据安全的保障措施。通过分析车联网路侧系统的安全风险及安全需求，基于商用密码技术构建了车联网路侧系统信息安全机制，研究了路侧系统的安全关键技术，为车联网路侧系统安全运行提供保障。     

基于5G的车联网体系架构及其应用分析

文中立足于车联网及移动通信技术的发展情况,简略阐述了研究背景,介绍了基于5G移动通信技术的车联网体系架构,并以我国某智慧园区为例,从智慧路况监测、远程驾驶、高精度定位、车联网业务平台主系统以及交通信号优化等方面着手,对其应用实例进行了详细分析,旨在为相关研究人员提供参考。     

网络经济离不开网络安全

专家曾预言,2000年的上半年将是数字革命的历史转折点,其具体含义是指网络正在从非主流地位转化为主流地位。网络经济正在从美国向世界各个地区扩散。在发展新经济的指导思想下,欧洲各国都憋着一股劲向前赶,以期赶上美国。在亚洲,传统经济向新经济的转变尤为明显,我国已有2250万人上网,2000年7月,企业上网工程正式启动,在这之前的政府上网工程取得了阶段性成果,电子商务也由一个时髦名词变为拥有无数实践者和牺牲者的创业模式。     

光网络拓展了DWDM网络的性能

Lucent Technologies公司的研发机构——批在贝尔实验室工作的科学家,开发出了一项能够显著延伸DWDM网络性能范围的新技术。这项被称为LambdaXtreme Transport的技术可以在不采用电子再生的情况下在长达     

网络结构中容量评估方法

在网络结构的评估中,根据无线网络特征,将无线网络结构分为覆盖、容量和频率三个维度。容量作为其中一个最为主要的方面,在评估中,包括两个主要方面,即容量是否充足,容量是否均衡,通过制定了4个与容量相对应的指数,通过量化的数据对网络的容量做出一个合理科学的评估分析。     

本地网汇接局交换网络的调整

通过对哈尔滨本地网市话汇接局和无线市话汇接局现状和存在的问题的调查研究，结合本地网未来的发展趋势，提出了本地网汇接局的交换网络调整方案。     

浅析我国数字集群的专网、共网与公网

从数字集群的特点和作用出发，结合我国数字集群发展的现状．分析了数字集群专网．共同和公阐三者关系．依据信息产业部对数字集群的发展政策辩证地论述了我国现阶段数字集群通信系统的发展观。     

Wide area ubiquitous network: the network operator's view of a sensor network

This article describes a network concept called the wide area ubiquitous network (WAUN) and its research activities. WAUN is a network for sensors and actuators, and can support low-end wireless terminals, which are expected to be used for new applications. Among the many types of R&D being performed in the WAUN project, this article focuses on the feasibility of its basic feature and target. The basic feature is ?wide coverage using very-low-power-consumption terminals,? and its specific target is a ?5-km cell radius using 10-mW transmission power terminals with a battery life of 10 years.? The results of a basic field experiment and a laboratory experiment suggest that the target seems to be feasible using wireless technologies such as diversity reception (with additional future effort to improve the packet error rate for use in business districts) and LSI technologies such as a power switch fabricated in a CMOS/SOI LSI.     

The ATM Forum's private network/network interface

The ATM Forum completed the first version of its private network/network interface (PNNI) in March 1996 and many ATM switch manufacturers are now offering early implementations. PNNI offers a different type of internetwork or internodal interface from the traditional Signalling System No 7 based approach favoured to date by 'public' network operators, such as BT. In spite of its name, however, PNNI may find its place in network service provider networks as well as in 'private' or customer networks. Some of the perceived limitations of the current specification for such an environment are currently being addressed in version 2, tentatively due for completion in the second half of 1998.The PNNI really consists of two parts, a signalling protocol based around the ATM Forum's UNI signalling specification, and a dynamic source routeing protocol. This paper aims to provide an overview of the functionality and mechanics of PNNI, and to compare and contrast with the functionality offered by ITU-T's B-ISUP.     

Neural network design of a banyan network controller

The algorithm for choosing nonblocking sets of data cells from the queues can significantly affect the throughput and queuing behavior. The authors present an algorithm that is shown to have maximum throughput. This algorithm is reduced on a banyan network to a constraint satisfaction problem by using an equivalence approach. To gain the required computational speed, the massive parallelism of neural networks is used. A neural network design using multiple overlapping winner-take-all circuits is defined. This is shown to be stable and to result only in nonblocking sets of data cells. An efficient interface between the neural network and the queue is also defined. The performance of the banyan with a neural network controller is compared to a noninternal-blocking switch with various controllers. The banyan is within a factor of two of the nonblocking switch     

浅谈移动通信网的网络优化

近年来随着移动通信网络的迅猛发展，在市场需求的驱动下，移动网络不断扩容，网络的规划也一再随之调整。建设周期短，发展速度快，前后工期重叠进行，造成整个通信网络的各种资源不能得到合理的应用，网络运行效率低。为使得网络资源能够合理配置和应用，移动通信网络的网络优化工作已经成为移动通信运营商提高服务水平，保障通信质量的重要工作内容。     

Effective network management via dynamic network anomaly visualization

Managed network has become increasingly large, complex, heterogeneous, and dynamic. With tremendous number of network components changing at any moment, deciding which events and changes are possibly abnormal and need further investigation is extremely challenging. While there has been widely adopted practice to log daily activities through standard file formats such as netflow, syslog, firewall, and IDS systems, it is vital for system administrators and network managers to be able to analyze the vast amount of log data in order to detect suspicious behaviors or patterns, possibly because of malicious users/applications or faulty devices. While there are automated systems that are available to generate warnings, whether such alarms are true or false, and more importantly, what are the underlying causes are still difficult to know. To bridge the gap between network logging and anomaly analysis, we design and implement a visualization tool that combines multiple useful visualizations together with algorithms such as graph link anomaly analysis. We study the effects of different visualization methods on detecting and analyzing network and system anomalous events and their causes and show that these views, when combined and linked together, may provide an effective alternative for network management and anomaly analysis. Copyright © 2016 John Wiley & Sons, Ltd.