【摘要】：在以IP業(yè)務(wù)為代表的分組業(yè)務(wù)量井噴式增長和新型業(yè)務(wù)不斷涌現(xiàn)所導(dǎo)致的巨大帶寬需求的刺激下,光網(wǎng)絡(luò)技術(shù)迅速發(fā)展并不斷演變。同時,光網(wǎng)絡(luò)技術(shù)的迅速發(fā)展又推動了寬帶流媒體應(yīng)用的快速增長,以視頻流媒體為代表的寬帶分組業(yè)務(wù)應(yīng)用成為驅(qū)動運營商網(wǎng)絡(luò)轉(zhuǎn)型的主要推動力。支持分組傳送、滿足多種類型寬帶分組業(yè)務(wù)的不同QoS需求是下一代傳送網(wǎng)的主要特點之一。與此同時,當(dāng)前網(wǎng)絡(luò)的異構(gòu)性和大規(guī)�；内厔菝黠@,多層多域網(wǎng)絡(luò)是未來傳送網(wǎng)的發(fā)展趨勢,多層多域網(wǎng)絡(luò)的設(shè)計問題、資源配置和優(yōu)化問題也成為傳送網(wǎng)鄰域研究的熱點 在攻讀博士學(xué)位期間,作為主要研究人員,本人參與并完成863和企業(yè)基金項目,對分組業(yè)務(wù)模型及其在光網(wǎng)絡(luò)中的特征、分組傳送網(wǎng)T-MPLS/MPLS-TP的管理維護(hù)問題和保護(hù)機制問題、多層多域網(wǎng)絡(luò)的組網(wǎng)設(shè)計和分域問題進(jìn)行了理論研究和仿真實驗,取得的主要創(chuàng)新成果有： 1、針對目前光網(wǎng)絡(luò)中不同的業(yè)務(wù)特征和QoS需求,給出自相似業(yè)務(wù)和流媒體業(yè)務(wù)模型,構(gòu)造了自相似性業(yè)務(wù)發(fā)生模塊并進(jìn)行了仿真,提出了一種層次化的流媒體業(yè)務(wù)仿真方案,分別設(shè)計了存儲流媒體業(yè)務(wù)和實時流媒體業(yè)務(wù)的仿真流程,并給出了兩種流媒體業(yè)務(wù)對應(yīng)的日志形式的數(shù)據(jù)參量。 2、在分析分組傳送網(wǎng)OAM和保護(hù)倒換需求的基礎(chǔ)上,結(jié)合當(dāng)前的網(wǎng)絡(luò)特點,基于環(huán)回和源路由聯(lián)合保護(hù)技術(shù),提出了一種保證業(yè)務(wù)時序正確并降低丟包率的聯(lián)合優(yōu)化方案,仿真結(jié)果表明所提方案在平均延時和平均丟包數(shù)方面均具有良好的性能。 3、在基于PCE的多域網(wǎng)絡(luò)中,研究了多域光網(wǎng)絡(luò)中的路徑計算單元(PCE)位置選取技術(shù),基于二次整形規(guī)劃算法抽象出多域網(wǎng)絡(luò)中PCE選址策略的數(shù)學(xué)模型； 4、提出了兩種PCE選址相關(guān)算法：全局優(yōu)化算法(GOP)和分布式優(yōu)化算法(DOP),仿真結(jié)果表明所提出的兩種算法可以顯著的降低控制信息通信開銷,其中的DOP算法無需全局拓?fù)湫畔⒕涂梢垣@得接近最優(yōu)的結(jié)果。
[Abstract]:Stimulated by the blowout growth of packet traffic represented by IP services and the huge bandwidth demand caused by the continuous emergence of new services, the optical network technology develops rapidly and evolves. At the same time, the rapid development of optical network technology has promoted the rapid growth of broadband streaming media applications. The broadband packet service application represented by video streaming media has become the main driving force to drive the network transformation of operators. One of the main characteristics of next generation transport networks is to support packet transmission and to meet the different QoS requirements of various types of broadband packet services. At the same time, the current network heterogeneity and large-scale trend is obvious, multi-layer multi-domain network is the development trend of the future transport network, multi-layer and multi-domain network design problem, The problem of resource allocation and optimization has also become a hot spot in the study of transport network neighborhood. During the period of studying for a doctoral degree, as a leading researcher, I participated in and completed 863 and enterprise fund projects. The model of packet traffic and its characteristics in optical networks, the management and maintenance of packet transport network (T-MPLS/MPLS-TP), the protection mechanism, the design of multi-layer and multi-domain network and the simulation experiments are carried out. The main innovative achievements are as follows: 1. According to the different service characteristics and QoS requirements of optical network at present, the model of self-similar service and streaming media service is given, and the self-similar service generation module is constructed and simulated. In this paper, a hierarchical simulation scheme of streaming media service is proposed, and the simulation flow of storage streaming media service and real time streaming media service is designed respectively. The data parameters of two kinds of streaming media services are given. 2. On the basis of analyzing the requirements of packet transport network (OAM) and protection switching, combined with the characteristics of current network, combined with the combined protection technology of loop return and source routing, the data parameter of two kinds of streaming media services is given. A joint optimization scheme is proposed to ensure correct service timing and reduce packet loss rate. Simulation results show that the proposed scheme has good performance in terms of average delay and average number of packets lost. 3. In multi-domain networks based on PCE, the proposed scheme has good performance. The (PCE) location selection technology of path computing unit in multi-domain optical network is studied. The mathematical model of PCE location strategy in multi-domain network is abstracted based on quadratic shaping planning algorithm. 4. Two PCE location correlation algorithms are proposed: global optimization algorithm (GOP) and distributed optimization algorithm (DOP),). The simulation results show that the proposed two algorithms can significantly reduce the overhead of control information communication. The DOP algorithm can obtain close to optimal results without global topology information.
【學(xué)位授予單位】：北京郵電大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2014
【分類號】：TN929.1

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本文編號：2170294