本文選題：車載自組織網(wǎng)絡(luò) + 緊急信息告警　； 參考：《重慶大學》2015年碩士論文

【摘要】：車間信息交互是車聯(lián)網(wǎng)的研究重點之一,緊急告警信息的車間交互是改善道路交通安全的重要手段,車間緊急告警信息對傳輸實時性和準確性要求較高,如何快速、可靠地實現(xiàn)告警信息的分發(fā)成為近年來車輛無線通信領(lǐng)域中的研究熱點。本文基于車輛緊急告警信息的分發(fā)展開,提出了一種基于傳輸優(yōu)先級的空閑信道評估(Clear Channel Assessment,CCA)自適應(yīng)調(diào)整分發(fā)策略,本文的具體內(nèi)容包括:①介紹國內(nèi)外關(guān)于VANET消息分發(fā)研究現(xiàn)狀,總結(jié)現(xiàn)有協(xié)議中針對各種難點的解決思路,為論文的研究奠定基礎(chǔ)。②詳細介紹了車輛自組織網(wǎng)絡(luò)的體系結(jié)構(gòu)特點,回顧了車輛無線通信的相關(guān)標準及其應(yīng)用,分析了緊急告警信息交互的必要性及及其分發(fā)過程中的實時性和可靠性需求。③分析簡單泛洪引出網(wǎng)絡(luò)風暴問題,總結(jié)現(xiàn)有的各種基于泛洪算法的改進策略,提出根據(jù)消息類型劃分傳輸區(qū)域的方法,以減小轉(zhuǎn)發(fā)節(jié)點個數(shù);從消息危險度和重要度兩個方面入手,確定消息優(yōu)先等級的判定規(guī)則,并根據(jù)優(yōu)先級決策傳輸。④提出了具體的數(shù)據(jù)融合規(guī)則對受限區(qū)域劃分方法加以實現(xiàn)。結(jié)合消息優(yōu)先等級判定,實現(xiàn)了CCA門限值自適應(yīng)調(diào)整,并在此基礎(chǔ)上提出了一種緊急告警信息分發(fā)策略,給出了消息格式及分發(fā)流程,保障高危告警信息的快速可靠分發(fā)。⑤針對所述理論設(shè)計了一系列真實場景實驗,通過基于Tiny OS的無線傳感器硬件實驗平臺Net Eye模擬了一系列交通場景,驗證了本文提出方法的有效性。
[Abstract]:Workshop information interaction is one of the key points in vehicle networking. Workshop interaction of emergency alarm information is an important means to improve road traffic safety. Workshop emergency alarm information requires high real-time and accuracy transmission. The reliable realization of alarm information distribution has become a research hotspot in the field of vehicle wireless communication in recent years. Based on the distribution of vehicle emergency alarm information, this paper proposes an adaptive distribution strategy for free channel assessment (CCA) based on transmission priority. The specific contents of this paper include: 1 introduces the current research situation of VANET message distribution at home and abroad, and summarizes the solutions to various difficulties in the existing protocols. It lays a foundation for the research of this thesis. 2. The architecture characteristics of the vehicle ad hoc network are introduced in detail, and the related standards and applications of the vehicle wireless communication are reviewed. In this paper, the necessity of emergency alarm information interaction and the requirement of real-time and reliability in the process of distribution are analyzed. 3 the simple flooding brings out the network storm problem, and the existing improved strategies based on flood flooding algorithm are summarized. A method of dividing transmission area according to message type is proposed to reduce the number of forwarding nodes, and to determine the decision rules of message priority level from two aspects of message risk and importance. According to priority decision transmission 4. 4, a specific data fusion rule is proposed to implement the method of partitioning restricted regions. Based on the decision of message priority level, the adaptive adjustment of CCA threshold value is realized. On this basis, an emergency alarm information distribution strategy is proposed, and the message format and distribution flow are given. According to the theory, a series of real scene experiments are designed to ensure the rapid and reliable distribution of high risk alarm information. A series of traffic scenarios are simulated by net Eye, a wireless sensor hardware experimental platform based on tiny OS. The validity of the proposed method is verified.
【學位授予單位】：重慶大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TP391.44;TN929.5;U495

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1 楊樂;基于優(yōu)先級的車輛EWM自適應(yīng)分發(fā)策略研究[D];重慶大學;2015年

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