本文選題：空間綜合信息網(wǎng) + 電路/分組混合交換��； 參考：《西安電子科技大學(xué)》2014年碩士論文

【摘要】：近年來(lái),空間綜合信息網(wǎng)相關(guān)技術(shù)研究越發(fā)引人矚目,全球多個(gè)國(guó)家和政府機(jī)構(gòu)都發(fā)起了若干個(gè)研究項(xiàng)目并取得了一定的成果。通過(guò)比較美國(guó)及歐洲空間綜合信息網(wǎng)的研發(fā)進(jìn)展及設(shè)計(jì)方案,結(jié)合我國(guó)現(xiàn)有技術(shù)及客觀條件,介紹了我國(guó)在此方向上發(fā)展的可能性與機(jī)會(huì)。針對(duì)空間綜合信息網(wǎng)絡(luò)的核心科學(xué)問(wèn)題,結(jié)合實(shí)驗(yàn)室承擔(dān)項(xiàng)目,選取空間網(wǎng)絡(luò)交換和高動(dòng)態(tài)移動(dòng)自組網(wǎng)作為本文主要研究?jī)?nèi)容。在空間交換網(wǎng)絡(luò)方面,首先介紹了空間交換網(wǎng)絡(luò)的結(jié)構(gòu)類型,分析比較傳統(tǒng)交換方式的優(yōu)缺點(diǎn),總結(jié)交換網(wǎng)絡(luò)的特點(diǎn)及適用條件。為充分利用現(xiàn)有空間平臺(tái)硬件設(shè)備及滿足網(wǎng)絡(luò)數(shù)據(jù)業(yè)務(wù)多樣性,提出以分組交換為基礎(chǔ)的電路/分組混合交換概念。結(jié)合電路交換和交換分組的優(yōu)缺點(diǎn),設(shè)計(jì)以三級(jí)Clos網(wǎng)絡(luò)為基礎(chǔ)的混合交換結(jié)構(gòu)設(shè)計(jì)框圖,并利用并發(fā)主從循環(huán)分配算法對(duì)一級(jí)、二級(jí)交換鏈路申請(qǐng)匹配。詳細(xì)描述了電路組裝信息和分組信息的轉(zhuǎn)發(fā)流程,利用排隊(duì)論相關(guān)知識(shí)對(duì)混合交換系統(tǒng)進(jìn)行簡(jiǎn)單的理論分析。最后,利用OPNET搭建交換系統(tǒng)模型,進(jìn)行網(wǎng)絡(luò)仿真。在網(wǎng)絡(luò)負(fù)載從0.3增至0.7的過(guò)程中,分別測(cè)試電路業(yè)務(wù)和分組業(yè)務(wù)比例分別為4:6、5:5、6:4情況下,整個(gè)系統(tǒng)的端到端時(shí)延、丟包率和網(wǎng)絡(luò)吞吐率,并與雙平面交換系統(tǒng)做比較。仿真結(jié)果表明,該系統(tǒng)滿足電路業(yè)務(wù)恒定輸出的特性,兩種業(yè)務(wù)的時(shí)延及時(shí)延抖動(dòng)都可滿足空間交換機(jī)的性能指標(biāo)要求,多種數(shù)據(jù)業(yè)務(wù)可以很好地被承載。高動(dòng)態(tài)移動(dòng)自組網(wǎng)方面,在分析了傳統(tǒng)移動(dòng)自組網(wǎng)特性的基礎(chǔ)上,結(jié)合綜合網(wǎng)內(nèi)空間用戶的多樣性,指出高動(dòng)態(tài)自組網(wǎng)存在的客觀性,并對(duì)其獨(dú)有的特點(diǎn)及研究熱點(diǎn)做了解析說(shuō)明。針對(duì)高動(dòng)態(tài)自組網(wǎng)絡(luò)的特點(diǎn),在分析現(xiàn)有技術(shù)的前提下,給出特定應(yīng)用場(chǎng)景下物理層、MAC層及網(wǎng)絡(luò)層的關(guān)鍵問(wèn)題解決方案。提出分布式、多跳、競(jìng)爭(zhēng)中心的網(wǎng)絡(luò)形式,采用TDMA與時(shí)隙隨機(jī)接入相結(jié)合的方法實(shí)現(xiàn)時(shí)隙動(dòng)態(tài)分配,設(shè)計(jì)傳輸天線選擇方法以適應(yīng)波束切換天線的應(yīng)用,詳細(xì)描述了組網(wǎng)流程及網(wǎng)絡(luò)運(yùn)行準(zhǔn)則。在OPNET仿真平臺(tái)上搭建網(wǎng)絡(luò)模型仿真實(shí)現(xiàn),并添加動(dòng)畫效果直觀明了地展示節(jié)點(diǎn)之間實(shí)時(shí)數(shù)據(jù)收發(fā)及連接的動(dòng)態(tài)變化,觀察組網(wǎng)時(shí)延及節(jié)點(diǎn)吞吐率。結(jié)果表明,在5個(gè)節(jié)點(diǎn)的場(chǎng)景下,該方案可以在1.0375s內(nèi)實(shí)現(xiàn)全部入網(wǎng),但因節(jié)點(diǎn)頻繁失聯(lián)再重新入網(wǎng)現(xiàn)象而丟失的數(shù)據(jù)包數(shù)量不可忽視,表明此種方案性能還有很大提升空間。
[Abstract]:In recent years, the research of space integrated information network (SIN) technology has attracted more and more attention. A number of research projects have been initiated by many countries and government agencies all over the world and some achievements have been made. By comparing the research and development progress and design scheme of the United States and Europe, combining with the existing technology and objective conditions of our country, this paper introduces the possibility and opportunity of our country's development in this direction. In view of the core scientific problems of spatial integrated information network and the laboratory undertaking project, the space network switching and the high dynamic mobile ad hoc network are selected as the main research contents of this paper. In the aspect of spatial switching network, the structure types of spatial switching network are introduced, the advantages and disadvantages of traditional switching methods are analyzed, and the characteristics and applicable conditions of switching network are summarized. In order to make full use of the hardware of the existing space platform and to satisfy the diversity of network data services, the concept of circuit / packet hybrid switching based on packet switching is proposed. Combined with the advantages and disadvantages of circuit switching and switching packets, a hybrid switching architecture block diagram based on three-level Clos network is designed, and the concurrent master-slave cyclic allocation algorithm is used to match the first-and second-level switching link applications. The forwarding flow of circuit assembly information and packet information is described in detail, and a simple theoretical analysis of hybrid switching system is carried out by using the relevant knowledge of queuing theory. Finally, the switching system model is built with OPNET, and the network simulation is carried out. In the process of increasing the network load from 0.3 to 0.7, the ratio of circuit service and packet service is 4: 6 / 5: 5: 6: 6 respectively. The end-to-end delay, packet loss rate and network throughput of the whole system are compared with the biplane switching system. The simulation results show that the system meets the characteristics of constant output of circuit services, the delay and delay delay and jitter of both services can meet the performance requirements of spatial switches, and many kinds of data services can be well carried. In the aspect of high dynamic mobile ad hoc networks, based on the analysis of the characteristics of traditional mobile ad hoc networks and the diversity of spatial users in integrated networks, the objectivity of the existence of high dynamic ad hoc networks is pointed out. Its unique characteristics and research hot spots are explained analytically. According to the characteristics of high dynamic ad hoc networks, a solution to the key problems of MAC layer and network layer in physical layer is presented under the premise of analyzing the existing technologies. The distributed, multi-hop, competition center network form is proposed. The dynamic slot allocation is realized by combining TDMA with slot random access, and the transmission antenna selection method is designed to adapt to the application of beam-switching antenna. The network process and network operation criteria are described in detail. The simulation of network model is built on the OPNET platform, and the animation effect is added to show the dynamic change of the real-time data receiving, sending and connecting between nodes, and to observe the network delay and node throughput. The results show that in the scenario of five nodes, the scheme can access the network in 1.0375s, but the number of packets lost due to frequent node loss and re-entry can not be ignored, which indicates that the performance of this scheme still has a lot of room for improvement.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TP393.03

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