發(fā)布時(shí)間：2018-07-10 02:39

  本文選題：VDES + 軟件定義網(wǎng)絡(luò)��； 參考：《電子科技大學(xué)》2017年碩士論文

【摘要】：甚高頻數(shù)據(jù)交換系統(tǒng)(VHF Data Exchange System,VDES)是在水上移動(dòng)業(yè)務(wù)領(lǐng)域中船舶自動(dòng)識(shí)別系統(tǒng)(Automatic Identification System,AIS)上發(fā)展起來的新一代數(shù)字通信系統(tǒng)。VDES設(shè)計(jì)的目的是在實(shí)現(xiàn)全球范圍內(nèi)海事VHF移動(dòng)波段基礎(chǔ)上提供更高,更強(qiáng)的數(shù)據(jù)交換能力,實(shí)現(xiàn)船舶可向港口、海圖信息中心等推送或者索取信息的功能。VDES為提高信息傳輸距離,使用衛(wèi)星通信作為遠(yuǎn)距離信息傳輸方式。隨著VDES業(yè)務(wù)種類的增加,不同業(yè)務(wù)又需要不同的QoS指標(biāo),而路由技術(shù)是決定數(shù)據(jù)在衛(wèi)星網(wǎng)絡(luò)傳輸路徑的核心部分,其算法的優(yōu)劣直接決定著整個(gè)通信系統(tǒng)的網(wǎng)絡(luò)傳輸性能。首先,本文針對(duì)既有衛(wèi)星網(wǎng)絡(luò)控制架構(gòu)固定、軟件升級(jí)困難、不易更新網(wǎng)絡(luò)配置信息等問題,引用軟件定義網(wǎng)絡(luò)技術(shù),提出一種軟件定義衛(wèi)星網(wǎng)絡(luò)架構(gòu),對(duì)衛(wèi)星網(wǎng)絡(luò)控制架構(gòu)進(jìn)行設(shè)計(jì)。該架構(gòu)通過將控制功能和數(shù)據(jù)轉(zhuǎn)發(fā)功能解耦合,使衛(wèi)星節(jié)點(diǎn)僅含數(shù)據(jù)交換功能,而網(wǎng)絡(luò)控制功能則通過專業(yè)控制器以軟件的形式實(shí)現(xiàn),從而降低了衛(wèi)星節(jié)點(diǎn)的復(fù)雜度,同時(shí)實(shí)現(xiàn)業(yè)務(wù)的自動(dòng)化部署,提高網(wǎng)絡(luò)資源利用率。然后,本文針對(duì)既有衛(wèi)星路由算法多以單一QoS目標(biāo)作為優(yōu)化點(diǎn),而不能自適應(yīng)滿足多種不同業(yè)務(wù)傳輸質(zhì)量需求的問題,并結(jié)合衛(wèi)星網(wǎng)絡(luò)的特點(diǎn),以網(wǎng)絡(luò)可用帶寬、丟包率、鏈路時(shí)延為用戶QoS優(yōu)化目標(biāo),提出一種基于蟻群算法的多QoS目標(biāo)路由算法。本文同時(shí)對(duì)蟻群算法所固有的收斂速度慢、易限于局部最優(yōu)解等問題,基于軟件定義網(wǎng)絡(luò)技術(shù),提出相應(yīng)的改進(jìn)策略。最后,本文設(shè)計(jì)了基于云平臺(tái)資源管理技術(shù)、主機(jī)和網(wǎng)絡(luò)虛擬化技術(shù)及軟件定義網(wǎng)絡(luò)技術(shù),面向衛(wèi)星網(wǎng)絡(luò)的地面半實(shí)物仿真測(cè)試平臺(tái),以評(píng)估驗(yàn)證軟件定義衛(wèi)星網(wǎng)絡(luò)下多QoS目標(biāo)路由算法的性能。測(cè)試結(jié)果表明,本文提出的多QoS目標(biāo)路由算法在多業(yè)務(wù)條件下能更好的滿足不同用戶需求。
[Abstract]:VHF data Exchange system VDES (VHF data Exchange system VDES) is a new generation of digital communication system (.VDES) developed on the Automatic Identification system (AIS) in the field of marine mobile service. The purpose of the design is to realize the maritime VHF mobile in the world. Band based on the provision of higher, Stronger data exchange ability to realize the function that ships can push or request information to ports, chart information centers, etc. In order to improve the distance of information transmission, satellite communication is used as the mode of long-distance information transmission. With the increase of VDES service types, different services need different QoS indicators, and routing technology is the core part that determines the transmission path of data in satellite network, and its algorithm directly determines the network transmission performance of the whole communication system. First of all, aiming at the problems of fixed satellite network control architecture, difficult software upgrade and difficult updating of network configuration information, this paper proposes a software defined satellite network architecture by using software definition network technology. The satellite network control architecture is designed. By decoupling the control function and the data forwarding function, the satellite node only includes the data exchange function, while the network control function is realized by software through the professional controller, thus reducing the complexity of the satellite node. At the same time, the automatic deployment of services is realized, and the utilization rate of network resources is improved. Then, this paper aims at the problem that the existing satellite routing algorithms take single QoS target as the optimization point, but can not adaptively meet the transmission quality requirements of many different services. Combined with the characteristics of satellite networks, the available bandwidth and packet loss rate of the network are used. Link delay is the goal of user QoS optimization. An ant colony algorithm based multi-QoS target routing algorithm is proposed. At the same time, for the problem of slow convergence speed and easy to be limited to the local optimal solution of ant colony algorithm, based on the software definition of network technology, this paper puts forward the corresponding improvement strategy. Finally, based on the cloud platform resource management technology, host and network virtualization technology and software definition network technology, the paper designs a ground-based hardware-in-the-loop test platform for satellite network. To evaluate the performance of multiple QoS target routing algorithms defined by verification software in satellite networks. The test results show that the proposed multi-QoS target routing algorithm can better meet the needs of different users under multi-service conditions.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN927.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前2條

1 李冬妮;王光興;;LEO/MEO衛(wèi)星網(wǎng)絡(luò)中的一種抗毀動(dòng)態(tài)路由算法[J];計(jì)算機(jī)科學(xué);2004年09期

2 詹士昌,徐婕,吳俊;蟻群算法中有關(guān)算法參數(shù)的最優(yōu)選擇[J];科技通報(bào);2003年05期

相關(guān)博士學(xué)位論文 前3條

1 劉暢;船舶自動(dòng)識(shí)別系統(tǒng)（AIS）關(guān)鍵技術(shù)研究[D];大連海事大學(xué);2013年

2 郝選文;空間信息網(wǎng)抗毀路由及網(wǎng)絡(luò)防攻擊技術(shù)研究[D];西安電子科技大學(xué);2013年

3 王凱東;寬帶衛(wèi)星網(wǎng)絡(luò)關(guān)鍵技術(shù)研究[D];西安電子科技大學(xué);2005年

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本文編號(hào)：2111707