【摘要】：隨著21世紀的到來,經(jīng)濟得到了飛速的發(fā)展,人們的生活條件也得到了很大的改善,汽車的數(shù)量也逐漸增多,由此而引發(fā)的交通問題也呈現(xiàn)出來,人們開始更多的關(guān)注和研究交通問題,車聯(lián)網(wǎng)技術(shù)應(yīng)運而生。車聯(lián)網(wǎng)的概念源自于自物聯(lián)網(wǎng)。車聯(lián)網(wǎng)主要為了實現(xiàn)車車互聯(lián),車人互聯(lián)以及車路互聯(lián)。車載環(huán)境無線接入WAVE是一套專門為車輛在網(wǎng)絡(luò)通信環(huán)境下所設(shè)計的協(xié)議,該WAVE協(xié)議主要含有IEEE802.11p和IEEE1609系列協(xié)議。IEEE802.11p協(xié)議標準定義了車聯(lián)網(wǎng)物理層和MAC層的規(guī)范,作為底層協(xié)議保證了WAVE系統(tǒng)通信質(zhì)量的可靠性。IEEE1609協(xié)議主要應(yīng)用于車聯(lián)網(wǎng)WAVE系統(tǒng)的高層,以滿足車輛對無線通信的需求。論文主要圍繞車聯(lián)網(wǎng)無線電通信平臺設(shè)計與實現(xiàn)展開工作,設(shè)計實現(xiàn)了車聯(lián)網(wǎng)WAVE系統(tǒng),并在真實的無線信道下,對系統(tǒng)進行測試驗證。具體工作如下：(1)論文首先說明了WAVE協(xié)議棧的構(gòu)成,主要包括IEEE802.11p協(xié)議,IEEE1609系列協(xié)議以及OFDM的基本原理及其關(guān)鍵技術(shù)。(2)在研究WAVE協(xié)議棧的各組成協(xié)議原理的基礎(chǔ)上,設(shè)計和實現(xiàn)了車聯(lián)網(wǎng)無線電通信平臺發(fā)射端與接收端的相關(guān)功能模塊,在MAC層說明了MAC層的接入方式,MAC層的服務(wù)類型,MAC層的幀格式和幀類型。特別對基于CSMA/CA協(xié)議的分布式協(xié)調(diào)功能進行了深入的研究,最終設(shè)計實現(xiàn)了MAC幀的發(fā)送與接收流程。在網(wǎng)絡(luò)層詳細說明了網(wǎng)絡(luò)服務(wù)使用的無線信息傳輸格式,WAVE服務(wù)廣播幀WSA,以及WSM幀的詳細封包過程,設(shè)計實現(xiàn)了WAVE短消息協(xié)議WSMP的發(fā)送與接收流程,然后在物理層利用Matlab仿真平臺結(jié)和USRP實現(xiàn)了一個完整的OFDM無線通信系統(tǒng),并進行了仿真實驗。最終,詳細介紹了系統(tǒng)的運行步驟,通過程序測試發(fā)送端和接收端的相關(guān)性能,并對實驗結(jié)果給予了詳細的分析。
[Abstract]:With the arrival of the 21st century, with the rapid development of the economy, people's living conditions have also been greatly improved, the number of cars has gradually increased, and the traffic problems caused by this have also emerged. People began to pay more attention to and study traffic problems, and the technology of vehicle networking came into being. The concept of car networking derives from the self-internet of things. The main purpose of vehicle networking is to realize the interconnection of cars and cars, the interconnection of cars and people, and the interconnection of cars and roads. Wireless access WAVE in vehicle environment is a set of protocols specially designed for vehicles in network communication environment. The WAVE protocol mainly includes IEEE802.11p and IEEE1609 series protocols. IEEE 802.11p protocol standard defines the specification of physical layer and MAC layer of vehicle network. As the bottom protocol, the reliability of communication quality of WAVE system is guaranteed. IEEE 1609 protocol is mainly applied to the high level of WAVE system in vehicle network, in order to meet the demand of wireless communication of vehicle. This paper mainly focuses on the design and implementation of the vehicle networking radio communication platform, designs and implements the vehicle networking WAVE system, and tests the system under the real wireless channel. The main work is as follows: (1) the composition of WAVE protocol stack is introduced firstly, including the IEEE802.11p protocol IEEE1609 series protocol and the basic principle and key technology of OFDM. (2) on the basis of studying the principle of each component protocol stack of WAVE protocol stack, This paper designs and implements the related function modules of the transmitter and receiver of the vehicle network radio communication platform. In the MAC layer, the access mode of the MAC layer and the service type of the MAC layer are explained, and the frame format and the frame type of the MAC layer are described. In particular, the distributed coordination function based on CSMA/CA protocol is deeply studied, and finally the transmission and receiving flow of MAC frame is designed and implemented. In the network layer, the wireless information transmission format used in the network service is described in detail. The broadcast frame WSAs of wave service and the detailed packet sealing process of WSM frames are described in detail. The sending and receiving flow of WAVE short message protocol (WSMP) is designed and realized. Then a complete OFDM wireless communication system is realized by using Matlab simulation platform and USRP in the physical layer, and the simulation experiment is carried out. Finally, the running steps of the system are introduced in detail, the correlation between the sender and receiver is tested by program, and the experimental results are analyzed in detail.
【學位授予單位】：東南大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U495

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