ZigBee车路通信平台设计和性能分析
发布时间：2019-04-29 13:09
【摘要】：车路通信是车联网中车辆通信的重要组成部分，但是由于车联网中车辆的移动性、无线信道的开放性、复杂环境的时变性、拓扑结构的易变性等都是车路通信面临的挑战，因此车路通信对快速组网、抗多径效应、抗多普勒频移方面提出了更高的要求。 本文针对车路通信中车辆快速移动导致的多普勒效应对有效传输距离和掉包率的影响，采用CC2530芯片，搭建基于ZigBee的短距离车路通信简易平台，在实验数据的基础上，分析并研究车速、多普勒频移、天线高度等因素对有效传输距离和掉包率等车路通信性能的影响，并建议通过自适应调制和功率控制来应对传输环境的变化。 本文首先简单介绍了车联网的发展情况、车路通信在国内外的研究现状和发展趋势，并介绍了ZigBee技术的特点、应用、网络基础以及协议栈，最终确定ZigBee为本文选择的无线通信技术；然后提出了系统的总体设计方案，，分模块阐述了系统的硬件设计，并在协议栈的基础上给出了系统的软件设计；再次利用遥控小车在系统方案的基础上搭建了基于ZigBee的简易车路通信平台，在此平台上进行了静态和动态实验，给出了车速对传输距离和掉包率的影响；最后对车路通信的传输距离进行了估算，并从多普勒频移入手，对影响车路通信的因素进行数学建模，分析了这些因素对车路通信的影响。
[Abstract]:Vehicle-road communication is an important part of vehicle communication in vehicle networking. However, due to the mobility of vehicles, the openness of wireless channel, the time-variability of complex environment, the variability of topology and so on, it is a challenge to vehicle-road communication. Therefore, higher requirements for fast networking, anti-multipath effect and anti-Doppler frequency shift are put forward in vehicle-road communication. In view of the influence of Doppler effect on effective transmission distance and packet drop rate caused by vehicle rapid movement in vehicle-road communication, this paper uses CC2530 chip to build a simple platform for short-range vehicle communication based on ZigBee, on the basis of experimental data. The effects of vehicle speed, Doppler frequency shift and antenna height on the performance of vehicle communication such as effective transmission distance and packet drop rate are analyzed and studied. It is suggested that adaptive modulation and power control should be adopted to deal with the change of transmission environment. Firstly, this paper briefly introduces the development of vehicle networking, the research status and development trend of vehicle-road communication at home and abroad, and introduces the characteristics, application, network foundation and protocol stack of ZigBee technology. Finally, ZigBee is selected as the wireless communication technology. Then the overall design scheme of the system is put forward, the hardware design of the system is described by modules, and the software design of the system is given on the basis of the protocol stack. Thirdly, a simple vehicle communication platform based on ZigBee is built on the basis of the system scheme of the remote control car. Static and dynamic experiments are carried out on this platform, and the influence of speed on the transmission distance and packet drop rate is given. Finally, the transmission distance of vehicle-road communication is estimated, and the factors affecting vehicle-road communication are modeled by Doppler frequency shift, and the influence of these factors on vehicle-road communication is analyzed.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U495;TN92
本文编号：2468265
[Abstract]:Vehicle-road communication is an important part of vehicle communication in vehicle networking. However, due to the mobility of vehicles, the openness of wireless channel, the time-variability of complex environment, the variability of topology and so on, it is a challenge to vehicle-road communication. Therefore, higher requirements for fast networking, anti-multipath effect and anti-Doppler frequency shift are put forward in vehicle-road communication. In view of the influence of Doppler effect on effective transmission distance and packet drop rate caused by vehicle rapid movement in vehicle-road communication, this paper uses CC2530 chip to build a simple platform for short-range vehicle communication based on ZigBee, on the basis of experimental data. The effects of vehicle speed, Doppler frequency shift and antenna height on the performance of vehicle communication such as effective transmission distance and packet drop rate are analyzed and studied. It is suggested that adaptive modulation and power control should be adopted to deal with the change of transmission environment. Firstly, this paper briefly introduces the development of vehicle networking, the research status and development trend of vehicle-road communication at home and abroad, and introduces the characteristics, application, network foundation and protocol stack of ZigBee technology. Finally, ZigBee is selected as the wireless communication technology. Then the overall design scheme of the system is put forward, the hardware design of the system is described by modules, and the software design of the system is given on the basis of the protocol stack. Thirdly, a simple vehicle communication platform based on ZigBee is built on the basis of the system scheme of the remote control car. Static and dynamic experiments are carried out on this platform, and the influence of speed on the transmission distance and packet drop rate is given. Finally, the transmission distance of vehicle-road communication is estimated, and the factors affecting vehicle-road communication are modeled by Doppler frequency shift, and the influence of these factors on vehicle-road communication is analyzed.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U495;TN92
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