WDM網(wǎng)絡(luò)中疏導端口的使用與分配算法研究

發(fā)布時間：2018-05-04 07:36

本文選題：光/電混合交換 + 節(jié)能��；參考：《西安電子科技大學》2014年碩士論文

【摘要】：隨著互聯(lián)網(wǎng)技術(shù)的迅猛發(fā)展,網(wǎng)絡(luò)技術(shù)延伸到各個領(lǐng)域,通信業(yè)務(wù)量呈爆炸式增長。然而,隨著人們需求的不斷增加,網(wǎng)絡(luò)帶寬的不斷擴大,通信設(shè)備的不斷增多,能耗問題隨之而來。溫室效應(yīng)日益惡化并且全球出現(xiàn)能源危機。因此降低通信設(shè)備的能耗刻不容緩。光網(wǎng)絡(luò)的節(jié)能規(guī)劃設(shè)計成為目前核心網(wǎng)絡(luò)的研究熱點之一。在光/電混合交換設(shè)備中,電交換單元的數(shù)目遠遠小于光交換單元的數(shù)目,一方面是由于電交換單元的功耗比較大,另一方面是由于電交換單元組成的大規(guī)模多級交換網(wǎng)絡(luò)的成本和復雜度要高得多。但是由于在光交換網(wǎng)絡(luò)中大量的業(yè)務(wù)傳輸需要業(yè)務(wù)疏導技術(shù),所以不得不使用電交換端口。本論文的主要工作是盡量少使用端口,合理搭配使用端口和波長,在保證網(wǎng)絡(luò)低阻塞的前提下降低網(wǎng)絡(luò)功耗。本文中的主要工作如下:(1)提出了主節(jié)點法。根據(jù)節(jié)點的重要度大小在網(wǎng)絡(luò)中設(shè)定主次節(jié)點,其中主節(jié)點分配電端口,具有業(yè)務(wù)疏導能力,次節(jié)點不分配電端口,沒有業(yè)務(wù)疏導能力。這樣大大減少了網(wǎng)絡(luò)中使用的疏導端口數(shù)目,降低了功耗。它包括靜態(tài)主節(jié)點法和動態(tài)主節(jié)點法。靜態(tài)主節(jié)點法是在網(wǎng)絡(luò)運行前已知網(wǎng)絡(luò)負載的前提下,設(shè)定主次節(jié)點并分配疏導端口。通過仿真分析得到這種方法在低負載時節(jié)能效果特別明顯,但是在負載90Erlang以后對節(jié)能沒有效果。它只適合于低負載且網(wǎng)絡(luò)負載已知的情況下。為了克服靜態(tài)主節(jié)點法的缺點,又提出了動態(tài)主節(jié)點法。它能夠感知網(wǎng)絡(luò)負載的大小變化,且能根據(jù)網(wǎng)絡(luò)負荷的變化動態(tài)地開關(guān)電端口。在負載大時及時開啟一些節(jié)點的電端口以保證網(wǎng)絡(luò)業(yè)務(wù)的正常傳輸,在負載小時關(guān)閉一些多余的端口從而降低功耗。仿真結(jié)果發(fā)現(xiàn)動態(tài)主節(jié)點法不僅在低負載時節(jié)能,在高負載時也能降低功耗還能在一定范圍內(nèi)降低阻塞率。(2)提出了端口分配策略。由于各個節(jié)點在網(wǎng)絡(luò)中的疏導能力不同,同一負載下各個節(jié)點使用的疏導端口是不一樣的。傳統(tǒng)的方法是均勻分配端口,這樣會造成有些節(jié)點端口不夠用而有些節(jié)點出現(xiàn)剩余空閑端口的情況,端口得不到充分利用。端口分配策略根據(jù)節(jié)點的重要度把網(wǎng)絡(luò)中的節(jié)點分為三類,大節(jié)點小節(jié)點和中間節(jié)點。大節(jié)點多分配端口,小節(jié)點少分配端口,中間節(jié)點分配適量的端口。本論文分別在一般環(huán)境下和動態(tài)主節(jié)點法下實施端口分配策略,仿真結(jié)果說明端口分配策略具有很好的節(jié)能效果,還能降低阻塞率,尤其是在動態(tài)主節(jié)點法下效果最好。
[Abstract]:With the rapid development of Internet technology, network technology extends to various fields, and communication traffic increases explosively. However, with the increasing of people's demand, the increasing of network bandwidth and the increasing of communication equipment, the problem of energy consumption follows. Greenhouse Effect is deteriorating and there is a global energy crisis. Therefore, it is urgent to reduce the energy consumption of communication equipment. Energy saving planning and design of optical network has become one of the research hotspots in the core network. In optical / electric hybrid switching devices, the number of electrical switching units is much smaller than the number of optical switching units, in part because of the high power consumption of the electrical switching units. On the other hand, the cost and complexity of large scale multilevel switching networks are much higher. However, a large number of traffic transmissions in optical switching networks require traffic grooming technology, so power switching ports have to be used. The main work of this paper is to reduce the power consumption of the network by using as few ports as possible, and using the port and wavelength in a reasonable way. The main work of this paper is as follows: 1) A master node method is proposed. According to the importance of nodes, the primary and secondary nodes are set in the network, in which the primary node distributes the power port, which has the ability of traffic grooming, the secondary node does not allocate the power port, and the secondary node has no traffic grooming ability. This greatly reduces the number of grooming ports used in the network and reduces power consumption. It includes static master node method and dynamic master node method. Static master node method is to set primary and secondary nodes and assign grooming ports on the premise that network load is known before network operation. The simulation results show that the energy saving effect of this method is especially obvious when the load is low, but it is not effective after the load 90Erlang. It is only suitable for low load and network load known. In order to overcome the shortcomings of static master node method, a dynamic master node method is proposed. It can perceive the change of network load and switch the electric port dynamically according to the change of network load. When the load is heavy, the power ports of some nodes are opened in time to ensure the normal transmission of network services, and some redundant ports are closed during the load hours to reduce the power consumption. The simulation results show that the dynamic master node method can not only save energy in low load, but also reduce power consumption in high load and reduce blocking rate within a certain range. Due to the different grooming ability of each node in the network, the grooming ports used by each node under the same load are different. The traditional method is to distribute the ports evenly, which will lead to some node ports are not enough and some nodes have spare ports, so the ports are not fully utilized. According to the importance of nodes, the port allocation strategy divides the nodes into three categories: large nodes, small nodes and intermediate nodes. Large nodes allocate more ports, small nodes allocate fewer ports, and intermediate nodes allocate appropriate ports. In this paper, the port allocation strategy is implemented in general environment and dynamic master node method. The simulation results show that the port allocation strategy has a good energy-saving effect, and can also reduce the blocking rate, especially in the dynamic master node method.
【學位授予單位】：西安電子科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN929.1

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