车联网中混合业务传输的性能评估及优化研究

发布时间：2018-01-20 17:04

本文关键词： 智能交通系统车联网混合业务媒体接入控制　出处：《北京邮电大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着社会发展和经济水平的提高,机动车保有量,尤其是私家车的数量大大增加。汽车数量的增加带了很多随之而来的问题,其中交通拥堵和道路安全问题尤为突出。因此研究人员提出智能交通系统来应对这些问题。车联网是智能交通系统实现的重要组成部分。车联网可以实现车辆间的信息交互,提高道路交通安全；它还可以为乘车人员提供互联网接入,增加乘车时的乐趣。目前车联网的通信技术主要有由IEEE制定的WAVE/802.11p协议族。在车载无线通信系统中,该协议因为最具代表性受到研究者广泛关注,很多车联网通信系统的研究都是基于该协议进行的。本文首先简要介绍了目前车联网的研究和发展状况,重点介绍了WAVE协议的媒体接入控制(MAC)层设计和车联网MAC层设计的问题。随后介绍了本文为了考察车联网混合业务性能做出的仿真系统分析以及设计。接下来,本文结合现有网络流量的分析,定义了车联网中的混合业务和各类业务的模型。随后本文考察了在给定的混合业务下IEEE802.11p的MAC层性能,即现有协议对于混合业务的支持能力,并针对IEEE802.11p对于混合业务支持能力不足的情况,提出了一种新的基于分布式时分多址技术的MAC层改进方案,CFR MAC。经过本文的车联网仿真平台的验证,本文提出的CFR MAC性能总体优于IEEE802.11p的MAC机制,可以更好的传输车联网混合业务。
[Abstract]:With the development of society and the improvement of economic level, the number of motor vehicles, especially the number of private cars, has increased greatly. The increase of the number of cars has brought a lot of problems. Traffic jams and road safety problems are especially prominent among them, so researchers put forward intelligent transportation system to deal with these problems. Car networking is an important part of intelligent transportation system. Information exchange. Improving road traffic safety; It can also provide Internet access for passengers. To increase the fun of riding. At present, the communication technology of car networking mainly includes the WAVE/802.11p protocol family, which is formulated by IEEE. It is in the vehicle wireless communication system. The protocol is widely concerned by researchers because of its representativeness, and the research of many vehicle networking communication systems is based on the protocol. First of all, this paper briefly introduces the current research and development of vehicle networking. The media access control of WAVE protocol is introduced in detail. Layer design and vehicle networking MAC layer design problems. Then this paper introduces the performance of the vehicle networking hybrid business simulation system analysis and design. Next. Combined with the analysis of existing network traffic, this paper defines the models of hybrid services and various services in vehicle networking. Then, this paper investigates the MAC performance of IEEE802.11p under a given hybrid service. That is, the existing protocol for the hybrid service support ability, and for the IEEE802.11p for the hybrid service support capacity is insufficient. A new MAC layer improvement scheme based on distributed time division multiple access (DTAMA) technology is proposed, which is verified by the simulation platform of vehicle networking in this paper. The performance of CFR MAC proposed in this paper is better than that of MAC mechanism of IEEE802.11p.
【学位授予单位】：北京邮电大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U495

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