基于LTE-V双模车联网终端平台的设计与实现

发布时间：2018-02-04 19:03

本文关键词： 车联网 V2X LTE-V DSRC 可靠性　出处：《中国科学院大学(中国科学院工程管理与信息技术学院)》2017年硕士论文　论文类型：学位论文

【摘要】：车联网是以车内网、车际网和车载移动互联网为基础,按照约定的通信协议和数据交互标准,在车-X(X:车、路、行人及互联网等)之间,进行无线通讯和信息交换的大系统网络,是能够实现智能化交通管理、智能动态信息服务和车辆智能化控制的一体化网络,是物联网技术在交通系统领域的典型应用。近年来车联网相关的技术有很大的提高,从单纯的GPS+GPRS技术组合应用到现在的V2X直通网络。本文设计和实现一种基于LTE-V协议的车联网车载终端系统。车载终端系统包含软件设计和硬件设计,软件设计包含高层应用层、物理层、MAC层、平台驱动层。平台驱动层要求满足高可靠、支持任务删减,中断优先级可配、支持核间通信、数据空间统一分配、为物理层、MAC层、及应用层程序的快速运行提供必要的支撑。硬件设计包含原理图设计,PCB设计,可靠性设计。本课题选自,基于LTE-V车联网终端平台的硬件设计和平台驱动的开发。本作者主要完成的工作如下:1)完成基于车联网车载终端的硬件平台电路的设计和仿真。此硬件平台以本公司自研基带处理器为核心来设计本方案硬件平台。以高速射频控制器完成对车载终端射频数据的收发控制,并完成数据传输正确性校验和纠错;以DDR3做为车联网终端的运行内存,实现数据的高速处理;以7寸液晶屏作为车联网终端的显示界面;以DMA的方式对数据进行搬移;并以TTlog的方式对车联网终端的运行状态进行监控。2)完成车联网终端的系统启动引导;完成物理层算法的驱动模块的设计,仿真和调试。实现了射频收发控制、核间消息通信设计、DSP的省电管理、DMA数据搬移、省电管理、DSP基础模块设计。3)完成车联网终端系统平台的功能验证和系统集成测试,并通过硬件可靠性测试。本设计实现基于LTE-V车联网双模终端系统,实验证明系统处理速度快、性能稳定,满足LTE-V协议对车联网低延时、高可靠的要求;并对未来基于LTE-V协议的车联网产品提供设计参考依据。
[Abstract]:Car networking is based on the vehicular intranet, vehicular network and vehicle-mounted mobile Internet, in accordance with agreed communication protocols and data exchange standards, between vehicle-XX: vehicles, roads, pedestrians and the Internet. The large system network for wireless communication and information exchange is an integrated network which can realize intelligent traffic management, intelligent dynamic information service and intelligent vehicle control. It is a typical application of Internet of things technology in the field of transportation system. In recent years, the related technology of vehicle networking has been greatly improved. From simple GPS. GPRS technology combination is applied to the current V2X pass-through network. This paper designs and implements a vehicle-connected vehicle terminal system based on LTE-V protocol. The on-board terminal system includes software design and hardware design. The software design includes high layer application layer, physical layer MAC layer, platform driver layer. Platform driver layer requirements to meet the high reliability, support task deletion, interrupt priority can be allocated, support inter-core communication. The unified allocation of data space provides the necessary support for the physical layer MAC layer and the application layer program fast running. The hardware design includes schematic design PCB design and reliability design. Hardware Design and platform driver Development based on LTE-V vehicle Networked Terminal platform. The main work accomplished by the author is as follows: 1). The design and simulation of the hardware platform circuit based on the vehicle network vehicle terminal is completed. The hardware platform is designed with the core of our company's self-developed baseband processor. The high-speed radio frequency controller is used to complete the design of the vehicle terminal. Transceiver control of RF data. And the correctness of the data transmission and error correction; Using DDR3 as the running memory of the vehicle network terminal, the data can be processed at high speed. The 7-inch LCD screen is used as the display interface of the vehicle network terminal; To move the data by DMA; And the mode of TTlog to monitor the running state of the vehicle network terminal. 2) complete the system boot of the vehicle network terminal; The design, simulation and debugging of the driving module of the physical layer algorithm are completed. The RF transceiver control and inter-core message communication are implemented. The design of DSP power saving management and DMA data transfer, power saving management. DSP basic module design. 3) complete the vehicle networking terminal system platform functional verification and system integration testing, and pass the hardware reliability test. This design based on LTE-V vehicle networking dual-mode terminal system. The experimental results show that the system has the advantages of fast processing speed and stable performance. It meets the requirements of LTE-V protocol for the low delay and high reliability of the vehicle network. And to the future based on the LTE-V protocol of the car networking product design reference.
【学位授予单位】：中国科学院大学(中国科学院工程管理与信息技术学院)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN929.5;U495

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