【摘要】：目前,隨著網(wǎng)絡(luò)的快速發(fā)展,越來越多的用戶對(duì)數(shù)據(jù)傳輸業(yè)務(wù)要求顯著提高,而傳統(tǒng)的IP組播技術(shù)采用組播樹充當(dāng)數(shù)據(jù)在網(wǎng)絡(luò)中傳輸路徑,隨著網(wǎng)絡(luò)中組播數(shù)據(jù)流數(shù)量的迅速增加,網(wǎng)絡(luò)中的組播樹數(shù)目大量增加,網(wǎng)絡(luò)節(jié)點(diǎn)維護(hù)的組播轉(zhuǎn)發(fā)狀態(tài)急劇增長(zhǎng),內(nèi)在資源大量消耗,帶來龐大的管理開銷,導(dǎo)致路由表查詢緩慢,數(shù)據(jù)轉(zhuǎn)發(fā)速率下降,傳輸效率降低等問題,IP組播可擴(kuò)展性變差,無法滿足網(wǎng)絡(luò)需求。為解決上述問題,增強(qiáng)網(wǎng)絡(luò)數(shù)據(jù)傳輸能力,國(guó)家973計(jì)劃“可重構(gòu)信息通信基礎(chǔ)網(wǎng)絡(luò)體系研究”項(xiàng)目提出了“宏電路樹”的概念,宏電路樹是網(wǎng)絡(luò)為若干具有相似QoS需求的組播數(shù)據(jù)流所建立的共享組播樹,在公共傳輸路徑上采用宏電路傳遞模式。本文圍繞宏電路樹構(gòu)建關(guān)鍵技術(shù)進(jìn)行研究,根據(jù)宏電路樹功能特點(diǎn),對(duì)宏電路樹的網(wǎng)絡(luò)架構(gòu)、邏輯模型、構(gòu)建方法、構(gòu)建算法和協(xié)議設(shè)計(jì)等進(jìn)行了研究。主要研究?jī)?nèi)容如下:1.分析了現(xiàn)有組播傳輸?shù)难芯楷F(xiàn)狀,根據(jù)目前IP組播可擴(kuò)展性差,數(shù)據(jù)傳輸效率低下,資源浪費(fèi)嚴(yán)重等問題,研究了一種新的數(shù)據(jù)傳輸途徑:宏電路樹,它為網(wǎng)絡(luò)提供了有服務(wù)質(zhì)量保障的可靠數(shù)據(jù)傳輸服務(wù),是網(wǎng)絡(luò)能夠滿足多樣化業(yè)務(wù)數(shù)據(jù)傳輸?shù)挠行Чぞ?是可重構(gòu)網(wǎng)絡(luò)中重要的基礎(chǔ)性數(shù)據(jù)傳輸方式。2.對(duì)宏電路樹的相關(guān)基本概念進(jìn)行定義,研究了宏電路樹的網(wǎng)絡(luò)架構(gòu)、邏輯模型、構(gòu)建策略,為以后的宏電路樹構(gòu)建打下了基礎(chǔ)。3.在可重構(gòu)網(wǎng)絡(luò)環(huán)境下,根據(jù)宏電路樹的結(jié)構(gòu)特點(diǎn),在具有共同傳輸路徑的骨干網(wǎng)上建立宏電路樹,目的是區(qū)分類別為特定業(yè)務(wù)數(shù)據(jù)流服務(wù),根據(jù)特定數(shù)據(jù)流傳輸QoS需求分類,為特定類別的流量設(shè)定不同類型的宏電路樹進(jìn)行數(shù)據(jù)傳輸,實(shí)現(xiàn)了特定數(shù)據(jù)流的快速傳輸。4.對(duì)宏電路樹構(gòu)建算法進(jìn)行研究,主要根據(jù)聚合組播的思想,對(duì)宏電路樹的算法構(gòu)建,動(dòng)態(tài)調(diào)整算法及宏電路樹算法進(jìn)行研究分析,目的是如何使宏電路樹更快速有效地對(duì)數(shù)據(jù)流進(jìn)行傳輸。設(shè)計(jì)一種宏電路樹組-樹匹配算法,并和原有的組-樹匹配算法進(jìn)行對(duì)比分析,實(shí)驗(yàn)表明:宏電路樹組-樹匹配算法在減少帶寬浪費(fèi)、節(jié)約資源、提高組播可擴(kuò)展性方面有明顯作用。5.對(duì)宏電路樹協(xié)議進(jìn)行設(shè)計(jì),協(xié)議是網(wǎng)絡(luò)及數(shù)據(jù)通信的核心,對(duì)宏電路樹的管理層、控制層、數(shù)據(jù)層面功能結(jié)構(gòu)進(jìn)行研究,重點(diǎn)設(shè)計(jì)了宏電路樹的構(gòu)建和宏電路樹標(biāo)簽交換相關(guān)協(xié)議,其作用是使宏電路樹能夠快速、高效地傳輸具有相同路徑的數(shù)據(jù)流。
[Abstract]:At present, with the rapid development of the network, more and more users require more and more data transmission services. The traditional IP multicast technology uses multicast tree as the data transmission path in the network. With the rapid increase of the number of multicast data streams in the network, the number of multicast trees in the network increases greatly, the multicast forwarding state maintained by network nodes increases rapidly, and the internal resources are consumed a lot, which brings huge management overhead. As a result of slow routing table query, low data forwarding rate and low transmission efficiency, the scalability of IP multicast becomes poor, which can not meet the network requirements. In order to solve the above problems and enhance the network data transmission ability, the concept of "macro circuit tree" was put forward in the project of "Research on Reconfigurable basic Network system of Information and Communication" of 973 National Project. The macro circuit tree is a shared multicast tree established by the network for several multicast data streams with similar QoS requirements. The macro circuit transfer mode is adopted in the common transmission path. In this paper, the key technology of constructing macro circuit tree is studied. According to the function characteristics of macro circuit tree, the network structure, logic model, construction method, construction algorithm and protocol design of macro circuit tree are studied. The main contents are as follows: 1. In this paper, the current research situation of multicast transmission is analyzed. According to the problems of poor scalability, low efficiency of data transmission and serious waste of resources in IP multicast, a new data transmission approach, macro circuit tree, is studied. It provides a reliable data transmission service with quality of service, is an effective tool for network to meet the diverse business data transmission, and is an important basic data transmission mode in reconfigurable network. 2. The basic concepts of the macro circuit tree are defined, and the network architecture, logic model and construction strategy of the macro circuit tree are studied, which lays a foundation for the construction of the macro circuit tree in the future. 3. In the reconfigurable network environment, according to the structural characteristics of the macro circuit tree, the macro circuit tree is established in the backbone network with common transmission path. The purpose of the tree is to distinguish the categories for the specific service of business data flow and to classify it according to the requirements of the specific data stream transmission QoS. Set different types of macro circuit tree for specific types of traffic to carry out data transmission, and realize the fast transmission of specific data flow. 4. Based on the idea of aggregate multicast, the algorithm of constructing macro circuit tree, dynamic adjusting algorithm and macro circuit tree algorithm are studied and analyzed. The aim is to make the macro circuit tree transmit the data stream more quickly and efficiently. A tree matching algorithm for macro circuits is designed and compared with the original tree matching algorithm. The experimental results show that the tree group tree matching algorithm of macro circuits can reduce bandwidth waste and save resources. Improve multicast scalability has a significant role. 5. The protocol of macro circuit tree is designed, which is the core of network and data communication. The functional structure of management layer, control layer and data layer of macro circuit tree is studied. The construction of macro circuit tree and the related protocol of label exchange of macro circuit tree are mainly designed. The function of which is to make the macro circuit tree transmit data stream with the same path quickly and efficiently.
【學(xué)位授予單位】：解放軍信息工程大學(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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