發(fā)布時(shí)間：2018-03-02 05:29

  本文關(guān)鍵詞： 以太無源光網(wǎng)絡(luò) 多播業(yè)務(wù) 節(jié)能 調(diào)度　出處：《東北大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著社會(huì)的不斷進(jìn)步與全球經(jīng)濟(jì)的快速發(fā)展,氣候變暖、能源危機(jī)等全球化問題日益加劇。由于現(xiàn)有網(wǎng)絡(luò)系統(tǒng)的能源消耗很大,網(wǎng)絡(luò)系統(tǒng)的節(jié)能減排已刻不容緩,網(wǎng)絡(luò)能耗中占有較大比重的接入網(wǎng)成為節(jié)能技術(shù)的重要研究對象。近年來,以太無源光網(wǎng)絡(luò)(Ethernet Passive Optical Network, EPON)快速發(fā)展,被大量部署,業(yè)界認(rèn)為EPON是實(shí)現(xiàn)接入網(wǎng)“最后一公里”的最佳技術(shù)選擇。然而,多媒體技術(shù)的普及和推廣導(dǎo)致EPON網(wǎng)絡(luò)中多播業(yè)務(wù)與日劇增,從而加劇了網(wǎng)絡(luò)能量浪費(fèi)。如何降低多播業(yè)務(wù)的額外能耗成為EPON網(wǎng)絡(luò)未來發(fā)展和演進(jìn)過程中亟待解決的關(guān)鍵問題之一光網(wǎng)絡(luò)單元(Optical Network Unit, ONU)作為EPON系統(tǒng)中重要的耗能設(shè)備,由于數(shù)量眾多,成為EPON總網(wǎng)絡(luò)能耗的主要組成部分。本文研究EPON中面向多播業(yè)務(wù)的ONU節(jié)能問題,提出基于TSP (Travelling Salesman Problem)問題的ONU休眠節(jié)能算法,該算法的核心思想是將EPON中ONU能耗最小化問題轉(zhuǎn)化為經(jīng)典的TSP問題求解。研究內(nèi)容主要包括三部分：首先構(gòu)造面向多播業(yè)務(wù)的ONU能耗模型,引入多播業(yè)務(wù)調(diào)度的相關(guān)約束條件,對能耗最小化問題進(jìn)行規(guī)范的數(shù)學(xué)描述。其次,對多播組調(diào)度順序與時(shí)隙之間的關(guān)系進(jìn)行全面分析,指出多播業(yè)務(wù)調(diào)度的關(guān)鍵問題是多播組與時(shí)隙之間的最佳匹配。最后,將ONU能耗最小化問題轉(zhuǎn)化為一個(gè)TSP問題實(shí)例,采用鄰接數(shù)組構(gòu)造不同多播組之間狀態(tài)轉(zhuǎn)換的有向完全圖,將各多播組能耗及組間狀態(tài)轉(zhuǎn)換存儲(chǔ)于圖的數(shù)組中。通過遞歸法計(jì)算出不同調(diào)度順序下ONU總能耗,并按照能耗最低的調(diào)度順序進(jìn)行多播業(yè)務(wù)傳輸。本文通過網(wǎng)絡(luò)仿真軟件OPNET構(gòu)建EPON仿真系統(tǒng),對提出的節(jié)能算法進(jìn)行性能分析。仿真結(jié)果表明,本文提出的節(jié)能算法能有效降低EPON中多播業(yè)務(wù)能耗。
[Abstract]:With the continuous progress of the society and the rapid development of the global economy, the globalization problems such as climate warming and energy crisis are becoming more and more serious. Because the energy consumption of the existing network system is very large, the energy saving and emission reduction of the network system is urgent. In recent years, Ethernet Passive Optical Network (EPON), which occupies a large proportion of network energy consumption, has become an important research object of energy saving technology. The industry regards EPON as the best technical choice to realize "last kilometer" of access network. However, the popularization and popularization of multimedia technology has led to the rapid increase of multicast services in EPON network. Therefore, how to reduce the extra energy consumption of multicast service has become one of the key problems to be solved in the future development and evolution of EPON network. Optical Network Unit (EPON) is an important energy consuming device in EPON system. In this paper, the problem of ONU energy saving for multicast service in EPON is studied, and a ONU dormant energy saving algorithm based on TSP travelling Salesman problem is proposed, which is based on the problem of TSP travelling Salesman problem. The core idea of the algorithm is to transform the ONU energy consumption minimization problem in EPON into a classical TSP problem. The main contents of the research are as follows: firstly, the ONU energy consumption model for multicast services is constructed, and the constraints of multicast service scheduling are introduced. Secondly, the relationship between multicast group scheduling order and time slot is analyzed comprehensively, and the key problem of multicast service scheduling is the best match between multicast group and slot. Finally, the paper analyzes the relationship between multicast group scheduling order and time slot scheduling, and points out that the key problem of multicast service scheduling is the best match between multicast group and time slot. The problem of minimizing ONU energy consumption is transformed into an example of TSP problem, and the directed complete graph of state conversion between different multicast groups is constructed by adjacent array. The energy consumption of each multicast group and the state conversion between groups are stored in the array of graphs. The total energy consumption of ONU is calculated by recursive method under different scheduling order. In this paper, the EPON simulation system is constructed by the network simulation software OPNET, and the performance of the proposed energy-saving algorithm is analyzed. The simulation results show that, The proposed energy saving algorithm can effectively reduce the energy consumption of multicast services in EPON.
【學(xué)位授予單位】：東北大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN929.1

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