本文選題：車聯(lián)網(wǎng)　切入點：路由協(xié)議　出處：《長沙理工大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：車聯(lián)網(wǎng)作為智能交通系統(tǒng)的一個重要組成部分,研究它對于改善交通狀況和提高人們的出行安全具有較高的應(yīng)用意義,車聯(lián)網(wǎng)中節(jié)點具有高速移動和易受環(huán)境影響等特點,使得設(shè)計高效、可靠的路由協(xié)議變得困難和富于挑戰(zhàn)性。在城市場景下,障礙物的存在對網(wǎng)絡(luò)的分割和引起的隱藏終端問題,都是在設(shè)計路由協(xié)議時需要重點考慮的問題。本文研究了城市中不同場景下車聯(lián)網(wǎng)廣播路由協(xié)議,分析了其優(yōu)缺點,在具有復(fù)雜道路狀況的城市場景下,針對節(jié)點稀疏導(dǎo)致網(wǎng)絡(luò)不連通的問題,提出了一種新的城市廣播路由協(xié)議MBP (Moderate Broadcast Protocol)。dBP協(xié)議主要包括以下三點：(1)負(fù)責(zé)存儲--攜帶--轉(zhuǎn)發(fā)任務(wù)的節(jié)點不止一個,保證數(shù)據(jù)包多方向轉(zhuǎn)發(fā)；(2)分配存儲--攜帶--轉(zhuǎn)發(fā)任務(wù)的節(jié)點轉(zhuǎn)發(fā)信息的次數(shù)不止一次,防止數(shù)據(jù)包一次轉(zhuǎn)發(fā)失敗而丟棄；(3)提出了防范十字交叉口廣播風(fēng)暴的抑制機(jī)制,減少網(wǎng)絡(luò)中冗余數(shù)據(jù)包的傳輸,優(yōu)化網(wǎng)絡(luò)資源。通過以上三點保證了非連通區(qū)域通信的可靠性。MBP協(xié)議是分布式的且無需基礎(chǔ)設(shè)施輔助的廣播協(xié)議,不僅適用于連通網(wǎng)絡(luò)也適用于非連通網(wǎng)絡(luò)。本文使用網(wǎng)絡(luò)仿真工具NS2和節(jié)點移動模型仿真器VanetMobiSim進(jìn)行模擬仿真,生成比較接近真實車輛移動軌跡的運動場景,將所提出來的協(xié)議和MFlood協(xié)議進(jìn)行比較,在不同節(jié)點密度下,分別就網(wǎng)絡(luò)可達(dá)性、接收距離、傳輸開銷和接收開銷四個性能指標(biāo)進(jìn)行仿真,且在manhattan模型和接近真實城市場景下進(jìn)行仿真,仿真結(jié)果表明所提出來的協(xié)議性能較穩(wěn)定,傳輸性能得到提高。
[Abstract]:As an important part of Intelligent Transportation system (its), vehicle networking has high application significance for improving traffic conditions and improving people's travel safety. The nodes in vehicle networking have the characteristics of high speed movement and easy to be affected by the environment. It is difficult and challenging to design efficient and reliable routing protocols. In urban scenarios, the presence of obstacles causes network segmentation and hidden terminal problems. In this paper, we study the routing protocols in different scenarios of the city and analyze their advantages and disadvantages. In order to solve the problem of network disconnection caused by sparse nodes, a new urban broadcast routing protocol, MBP moderate Broadcast Protocol).dBP, is proposed, which mainly includes the following three points: 1) more than one node responsible for storing, carrying and forwarding tasks. To ensure the multi-direction forwarding of data packets (2) the node that distributes storage-carrying-forward task forwards the information more than once, and prevents the packet from being sent once and then discards the data packet.) it proposes a mechanism to prevent the broadcast storm at cross intersection. Reducing the transmission of redundant data packets in the network and optimizing the network resources. The reliability of the communication in the disconnected area is guaranteed by the above three points. MBP protocol is a distributed broadcast protocol that does not require infrastructure assistance. This paper uses the network simulation tool NS2 and the node movement model simulator VanetMobiSim to simulate and simulate the motion scene, which is close to the real vehicle movement trajectory, not only for the connected network, but also for the disconnected network. The proposed protocol is compared with the MFlood protocol. Under different node densities, the performance indexes of network accessibility, receiving distance, transmission overhead and reception overhead are simulated, respectively. The simulation results under the manhattan model and near real city scenario show that the proposed protocol is stable and the transmission performance is improved.
【學(xué)位授予單位】：長沙理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN915.04;TP391.44;U495

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相關(guān)期刊論文 前1條

1 程學(xué)虎;陳亞峰;;車聯(lián)網(wǎng)發(fā)展?fàn)顩r研究[J];中國無線電;2013年02期

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本文編號：1574749