本文選題：車載自組織網(wǎng)絡 + 移動模型　； 參考：《福建師范大學》2015年碩士論文

【摘要】：近年來,交通的安全和效率問題成為全世界各國面臨的重大考驗,全世界由于交通事故和交通效率低下造成了不可估計的人員傷亡和經(jīng)濟損失。車載自組織網(wǎng)絡(VANET,Vehicular Ad Hoc Network)作為移動自組織網(wǎng)絡(MANET,Mobile Ad Hoc Network)的一個分支,它通過車輛節(jié)點之間信息的交換,能夠實時的了解周圍車輛的行駛狀態(tài)和及時知道路況信息,從而提高車輛的行駛安全性,并緩解交通擁堵,提高交通效率。單跳廣播是VANET中信息傳輸?shù)闹饕绞?而由于VANET信道資源有限、網(wǎng)絡規(guī)模大等特點,隨著車輛節(jié)點越來越密集,將造成網(wǎng)絡負載過大。因此,若不對廣播信息的覆蓋范圍加以控制的話,將造成“廣播風暴”等問題,使得網(wǎng)絡性能大幅度降低甚至出現(xiàn)網(wǎng)絡癱瘓。本文以VANET的安全性應用為出發(fā)點,提出一種面向功率控制的VANET組網(wǎng)方式。首先,由于車輛節(jié)點的移動直接影響了VANET拓撲結構的變化,因此,為了驗證本文提出算法的有效性和優(yōu)越性,提出了一種更符合現(xiàn)實的車載移動模型。該模型是基于SUMO仿真平臺的,是對其中的跟車模型和變道模型改進而成的,并通過仿真分析,證明了新模型的有效性。其次,本文提出了一種新的VANET功率控制算法,該算法通過找出每個車輛節(jié)點的直接鄰居車輛,然后根據(jù)直接鄰居車輛的位置來調整發(fā)射功率,進而控制節(jié)點的廣播信息覆蓋范圍。最后,經(jīng)過大量的仿真實驗和結果分析,證明了文中所提出算法的有效性,并且能夠有效的降低網(wǎng)絡負載,優(yōu)化網(wǎng)絡傳輸時延以及分組投遞率等性能參數(shù),從而保證安全信息的有效傳輸。
[Abstract]:In recent years, the problem of traffic safety and efficiency has become a major test for all countries all over the world. Traffic accidents and inefficiency have caused inestimable casualties and economic losses all over the world. As a branch of Manet Mobile Ad Hoc Network), the vehicle-mounted ad hoc network (VANETV) can be used as a branch of Manet Mobile Ad Hoc Network). Through the exchange of information between vehicle nodes, it can understand the driving state of the surrounding vehicles in real time and know the road condition information in time. In order to improve the driving safety of vehicles, and alleviate traffic congestion, improve traffic efficiency. Single hop broadcasting is the main way of information transmission in VANET. Because of the limited resource of VANET channel and the large scale of network, as the vehicle nodes become more and more dense, the network load will be too large. Therefore, if the coverage of broadcast information is not controlled, problems such as "broadcast storm" will be caused, and the performance of the network will be greatly reduced or even the network will be paralyzed. Based on the security application of VANET, this paper proposes a power control oriented VANET networking method. Firstly, because the movement of vehicle nodes directly affects the change of VANET topology, in order to verify the effectiveness and superiority of the proposed algorithm, a more realistic vehicle moving model is proposed. The model is based on the SUMO simulation platform and is improved from the following model and the changing track model. The simulation results show that the new model is effective. Secondly, this paper proposes a new VANET power control algorithm, which finds out the direct neighbor vehicle of each vehicle node, and adjusts the transmission power according to the position of the direct neighbor vehicle. Then the broadcast information coverage of the node is controlled. Finally, a large number of simulation experiments and results analysis show that the proposed algorithm is effective, and can effectively reduce the network load, optimize the network transmission delay and packet delivery rate and other performance parameters. In order to ensure the effective transmission of security information.
【學位授予單位】：福建師范大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U495;TN929.5

【共引文獻】

相關期刊論文 前1條

1 姜紹君;王穎;;CSMA/CA算法的退避失敗概率的分析[J];計算機應用與軟件;2015年10期

相關碩士學位論文 前4條

1 樊鷺;無線Mesh網(wǎng)擁塞控制機制研究[D];海南大學;2012年

2 于菡蕾;空間環(huán)境中傳輸控制層協(xié)議研究[D];沈陽理工大學;2014年

3 杜千;流媒體系統(tǒng)中變動分段緩存策略的研究[D];北京交通大學;2015年

4 周美玲;代理移動IPv6切換技術優(yōu)化的研究及仿真[D];華南理工大學;2015年

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本文編號：1813610