本文選題：VANET + 多跳廣播路由��； 參考：《北京郵電大學(xué)》2015年碩士論文

【摘要】：智能交通系統(tǒng)(Intelligent Transport System,ITS)是將現(xiàn)代通信技術(shù)、網(wǎng)絡(luò)傳感技術(shù)、云端和移動(dòng)計(jì)算技術(shù)、智能終端和車路協(xié)同技術(shù)、智能時(shí)空網(wǎng)絡(luò)控制技術(shù)等高新技術(shù)應(yīng)用于整個(gè)交通管理體系,實(shí)現(xiàn)人車路更加全面的感知、更深度和更靈活的信息共享,對(duì)交通流實(shí)施動(dòng)態(tài)監(jiān)管和網(wǎng)絡(luò)化智能控制,從而建立起一種廣域、全方位的,實(shí)時(shí)、高效、精確的綜合運(yùn)輸和管理系統(tǒng)。而車輛自組織網(wǎng)絡(luò)(Vehicular Ad hoc Network, VANET)為車輛及路邊單元間通信和ITS系統(tǒng)數(shù)據(jù)傳輸提供重要的系統(tǒng)支撐。鑒于車聯(lián)網(wǎng)的高度動(dòng)態(tài)的網(wǎng)絡(luò)拓?fù)?有限的鏈路帶寬和信道質(zhì)量,通信距離有限和多跳自組織等特點(diǎn),VANET網(wǎng)絡(luò)研究中的一個(gè)關(guān)鍵問題是設(shè)計(jì)能夠在各節(jié)點(diǎn)之間提供高鏈路質(zhì)量、高接入效率及高傳輸可靠性的網(wǎng)絡(luò)路由協(xié)議。 從近期智能交通的需求和技術(shù)發(fā)展角度,VANET路由協(xié)議的研究主要集中在滿足交通安全告警和實(shí)時(shí)路況廣播兩方面,這兩種業(yè)務(wù)均需要通過廣播和多跳轉(zhuǎn)發(fā)的方式將信息傳遞給一定區(qū)域內(nèi)的所有通信節(jié)點(diǎn)。近年來已有很多國(guó)內(nèi)外的學(xué)者針對(duì)VANET中多跳廣播路由協(xié)議中轉(zhuǎn)發(fā)節(jié)點(diǎn)個(gè)數(shù)的抑制和安全廣播信息傳輸?shù)男首隽松钊氲难芯?并提出了不少有效的方案。但總體來講,一方面性能的提升,總會(huì)導(dǎo)致其他性能的削弱,各方案的整體效率依然不能滿足車輛通信的應(yīng)用需求。本文主要針對(duì)VANET網(wǎng)絡(luò)的特點(diǎn),提出一種基于實(shí)時(shí)交通估計(jì)的綜合加權(quán)多跳廣播路由算法(MBR-RTE)。本論文首次將實(shí)時(shí)交通估計(jì)在車輛和路況信息預(yù)判方面的優(yōu)勢(shì)應(yīng)用到廣播路由協(xié)議中,并設(shè)計(jì)綜合加權(quán)算法合理選擇轉(zhuǎn)發(fā)節(jié)點(diǎn),此外為進(jìn)一步提高系統(tǒng)的可靠性,我們還采用了超時(shí)重傳機(jī)制。理論分析和網(wǎng)絡(luò)仿真結(jié)果均表明,與傳統(tǒng)泛洪式算法和時(shí)隙堅(jiān)持算法相比,本算法極大地減少了廣播數(shù)據(jù)的冗余量,提高了網(wǎng)絡(luò)資源利用率,保證了多跳廣播路由的實(shí)時(shí)性和可靠性,該算法能夠很好地滿足高速環(huán)境下車聯(lián)網(wǎng)安全信息高效可靠廣播。
[Abstract]:Intelligent Transport system is an application of modern communication technology, network sensing technology, cloud and mobile computing technology, intelligent terminal and vehicle-road cooperation technology, intelligent space-time network control technology to the whole traffic management system.To achieve more comprehensive perception, deeper and more flexible information sharing, dynamic supervision and networked intelligent control of traffic flow, thus establishing a wide area, omnidirectional, real-time and efficient,Accurate integrated transportation and management system.Vehicle Ad hoc Network (VANET) provides important system support for communication between vehicle and roadside unit and data transmission in ITS system.In view of the characteristics of highly dynamic network topology, limited link bandwidth and channel quality, limited communication distance and multi-hop self-organization, a key problem in the research of VANET network is that it can provide high link quality between nodes.Network routing protocol with high access efficiency and high transmission reliability.The research of VANET routing protocol mainly focuses on meeting traffic safety alarm and real-time traffic condition broadcast from the perspective of the demand of intelligent transportation and the development of technology in the near future.Both services need to transmit information to all communication nodes in a certain area by broadcast and multi-hop transmission.In recent years, many scholars at home and abroad have done in-depth research on the suppression of the number of forwarding nodes in VANET multi-hop broadcast routing protocol and the efficiency of secure broadcast information transmission, and put forward many effective schemes.But generally speaking, on the one hand, the improvement of performance always leads to the weakening of other performance, and the overall efficiency of each scheme still can not meet the application requirements of vehicle communication.In this paper, according to the characteristics of VANET network, a comprehensive weighted multi-hop broadcast routing algorithm based on real-time traffic estimation is proposed.In this paper, the advantages of real-time traffic estimation in vehicle and road information prejudgment are applied to broadcast routing protocols for the first time, and a comprehensive weighted algorithm is designed to select the forwarding nodes reasonably, in order to further improve the reliability of the system.We also use the timeout retransmission mechanism.Theoretical analysis and network simulation results show that compared with the traditional flooding algorithm and slot persistence algorithm, this algorithm greatly reduces the redundancy of broadcast data and improves the utilization of network resources.The real-time and reliability of multi-hop broadcast routing is guaranteed, and the algorithm can well meet the needs of high speed environment and high efficient and reliable broadcast of the security information of alighting network.
【學(xué)位授予單位】：北京郵電大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U495

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