以太無源光網(wǎng)絡(luò)節(jié)能機(jī)制與算法研究
發(fā)布時間：2018-07-24 17:48
【摘要】：隨著全球溫室效應(yīng)不斷加劇,節(jié)能減排勢在必行。寬帶接入網(wǎng)作為“最后一公里”有效解決方案之一,其能耗約占全網(wǎng)能耗的75%。其中,具有高帶寬、高穩(wěn)定性的無源光網(wǎng)絡(luò)(Passive Optical Network, PON)以其遠(yuǎn)程節(jié)點的無源特性成為當(dāng)前最可行且節(jié)能的寬帶接入方案。作為一種成熟的PON技術(shù),以太無源光網(wǎng)絡(luò)(Ethernet PON, EPON)近年來已經(jīng)成為亞太地區(qū)部署最廣泛的寬帶接入網(wǎng)絡(luò)之一。隨著用戶數(shù)目和業(yè)務(wù)需求不斷增長,PON網(wǎng)絡(luò)能耗也隨之急劇增加。因此,如何有效降低PON網(wǎng)絡(luò),尤其是EPON網(wǎng)絡(luò)能耗,已成為一個極具學(xué)術(shù)和應(yīng)用價值的研究熱點。目前,EPON節(jié)能研究多采用休眠低負(fù)載光網(wǎng)絡(luò)單元(Optical Network Unit, ONU)的方法,但通常是休眠整個ONU,即發(fā)送機(jī)和接收機(jī)必須同時開啟或關(guān)閉。該方法不夠靈活,不僅節(jié)能效率低,還會降低服務(wù)質(zhì)量(Quality of Service, QoS)。此外,當(dāng)前的節(jié)能方法大多針對單播業(yè)務(wù),無法有效地解決面向多播業(yè)務(wù)的EPON節(jié)能問題。因此,EPON節(jié)能還存在很大的研究空間,是當(dāng)前構(gòu)建綠色網(wǎng)絡(luò)的重要挑戰(zhàn)之一本論文在總結(jié)和分析國內(nèi)外關(guān)于PON節(jié)能研究的基礎(chǔ)上,提出了新的ONU休眠模式。在不同網(wǎng)絡(luò)環(huán)境下,充分考慮將網(wǎng)絡(luò)特性與ONU休眠模式相結(jié)合,有效降低ONU能耗,從而促進(jìn)EPON網(wǎng)絡(luò)更加節(jié)能。本論文的主要工作和取得的創(chuàng)新成果如下：(1)第2章針對1G/10G-EPON網(wǎng)絡(luò)節(jié)能問題,首先提出了一種基于ONU休眠和動態(tài)雙閾值下行速率選擇的節(jié)能機(jī)制。在該機(jī)制中,ONU在上行傳輸結(jié)束后可進(jìn)入深度休眠狀態(tài),其休眠時間可根據(jù)上行業(yè)務(wù)量動態(tài)變化,從ONU休眠角度降低ONU能耗；其次,通過動態(tài)雙閾值下行速率選擇算法,在低業(yè)務(wù)負(fù)載時使用低能耗鏈路,從下行速率選擇的角度節(jié)能。基于該機(jī)制,通過允許上行傳輸時隙內(nèi)處于空閑狀態(tài)的接收機(jī)休眠,提出了基于ONU雙休眠狀態(tài)和動態(tài)雙閾值下行速率選擇的節(jié)能機(jī)制,從而進(jìn)一步降低ONU能耗。(2)第3章針對上行業(yè)務(wù)和下行業(yè)務(wù)不對等的EPON節(jié)能問題,提出了一種基于下行調(diào)度和混合休眠的節(jié)能機(jī)制。該機(jī)制允許ONU的發(fā)送機(jī)和接收機(jī)獨立休眠,有效減少上行業(yè)務(wù)和下行業(yè)務(wù)不同時存在時的能量浪費,并與ONU深度休眠模式相結(jié)合構(gòu)成混合休眠模式。通過合理的下行調(diào)度,既可進(jìn)一步促進(jìn)節(jié)能又可降低下行數(shù)據(jù)包時延。(3)第4章首先提出了一種基于混合休眠的多播業(yè)務(wù)節(jié)能機(jī)制。多播業(yè)務(wù)的特點是：有相同多播業(yè)務(wù)的ONU必須同時接收該業(yè)務(wù),而其上行業(yè)務(wù)不能同時傳輸。由此,所提機(jī)制引入混合休眠模式,使ONU的發(fā)送機(jī)和接收機(jī)可以獨立休眠,并結(jié)合ONU深度休眠模式,減少不必要的能量浪費。通過ONU深度休眠／喚醒算法,該機(jī)制可降低ONU喚醒次數(shù),從而降低ONU能耗。據(jù)此,提出基于混合休眠的多播業(yè)務(wù)改進(jìn)節(jié)能機(jī)制,通過ONU深度休眠/喚醒優(yōu)化算法,增加了ONU喚醒的約束條件,在保證QoS的前提下,進(jìn)一步降低ONU能耗。為驗證和評估上述機(jī)制的性能,本文利用OPNET仿真軟件搭建了仿真平臺。仿真結(jié)果表明,與傳統(tǒng)節(jié)能機(jī)制相比,本文所提機(jī)制更加節(jié)能,并且能夠保證業(yè)務(wù)的時延和吞吐量等性能維持在可接受水平。本文的研究成果對未來PON的發(fā)展和建設(shè)提供了理論參考和技術(shù)支撐。
[Abstract]:As the global greenhouse effect is aggravating, energy saving and emission reduction is imperative. As one of the "last kilometer" effective solutions, the energy consumption of broadband access network is about 75%. of the whole network energy consumption. The passive optical network with high bandwidth and high stability (Passive Optical Network, PON) is the most available for the passive characteristics of its remote nodes. As a mature PON technology, as a mature PON technology, Ethernet PON (EPON) has become one of the most widely deployed broadband access networks in the Asia Pacific region in recent years. As the number of users and business demand are increasing, the energy consumption of PON network is increasing rapidly. Therefore, how to effectively reduce the PON network Especially the energy consumption of EPON network has become a research hot spot of great academic and application value. At present, the research of EPON energy saving is mostly used to sleep low load optical network unit (Optical Network Unit, ONU), but usually the whole ONU is dormant, that is, the transmitter and receiver must be opened or closed at the same time. This method is not flexible enough, not only energy saving. Low efficiency and lower service quality (Quality of Service, QoS). In addition, the current energy saving methods are mostly aimed at unicast service, and can not effectively solve the EPON energy saving problem for multicast service. Therefore, there is a great research space for EPON energy saving. It is one of the important challenges to build green color network at present. This paper is summarized and analyzed in this paper. On the basis of internal and external research on PON energy conservation, a new ONU dormancy mode is proposed. Under the different network environment, the combination of network characteristics and ONU dormancy mode is fully considered to effectively reduce the energy consumption of ONU, thus promoting the EPON network to be more energy-efficient. The main work and the new achievements of this paper are as follows: (1) the second chapter is aimed at 1G/10G-EPON network In order to save energy, an energy-saving mechanism based on ONU dormancy and dynamic dual threshold downlink rate selection is proposed. In this mechanism, the ONU can enter a deep dormant state after the end of the uplink transmission. The dormancy time can be dynamically changed according to the upstream traffic and lower ONU energy consumption from the ONU dormancy angle; secondly, the dynamic dual threshold downlink speed can be achieved. The rate selection algorithm uses low energy consumption links to save energy from the angle of downlink rate selection. Based on this mechanism, an energy saving mechanism based on ONU double dormancy state and dynamic dual threshold downlink rate selection is proposed by allowing the idle state of the receiver to sleep in the uplink transmission slot, thus further reducing the energy consumption of ONU. ( 2) the third chapter proposes an energy-saving mechanism based on downlink scheduling and hybrid dormancy, which allows ONU transmitter and receiver to sleep independently, which can effectively reduce the energy waste when the upstream and downlink services are not simultaneously, and combine with the ONU deep dormancy mode. A hybrid dormancy mode is formed. Through a reasonable downlink scheduling, it can further promote energy saving and reduce the delay of downlink packets. (3) the fourth chapter first proposes a hybrid dormant multicast service energy saving mechanism. The feature of multicast service is that the ONU with the same multicast service must receive the service simultaneously, and its upstream business is not Therefore, the proposed mechanism introduces a hybrid dormancy mode, which makes the ONU transmitter and receiver dormant independently and combines the ONU deep dormancy mode to reduce unnecessary energy waste. Through the ONU deep dormancy / wake-up algorithm, this mechanism can reduce the number of ONU wake-up times and reduce the energy consumption of ONU, based on which a mixed dormancy is proposed. Through the ONU deep dormancy / wake-up optimization algorithm, the broadcast service improves the constraints of the ONU wake-up and further reduces the energy consumption of ONU under the premise of guaranteeing QoS. In order to verify and evaluate the performance of the above mechanism, this paper builds a simulation platform using the OPNET simulation software. The simulation results show that compared with the traditional energy saving mechanism, the simulation results show that The proposed mechanism is more energy-efficient and can ensure that the performance of time delay and throughput can be maintained at an acceptable level. The research results of this paper provide theoretical reference and technical support for the development and construction of PON in the future.
【學(xué)位授予單位】：東北大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2014
【分類號】：TN929.1
[Abstract]:As the global greenhouse effect is aggravating, energy saving and emission reduction is imperative. As one of the "last kilometer" effective solutions, the energy consumption of broadband access network is about 75%. of the whole network energy consumption. The passive optical network with high bandwidth and high stability (Passive Optical Network, PON) is the most available for the passive characteristics of its remote nodes. As a mature PON technology, as a mature PON technology, Ethernet PON (EPON) has become one of the most widely deployed broadband access networks in the Asia Pacific region in recent years. As the number of users and business demand are increasing, the energy consumption of PON network is increasing rapidly. Therefore, how to effectively reduce the PON network Especially the energy consumption of EPON network has become a research hot spot of great academic and application value. At present, the research of EPON energy saving is mostly used to sleep low load optical network unit (Optical Network Unit, ONU), but usually the whole ONU is dormant, that is, the transmitter and receiver must be opened or closed at the same time. This method is not flexible enough, not only energy saving. Low efficiency and lower service quality (Quality of Service, QoS). In addition, the current energy saving methods are mostly aimed at unicast service, and can not effectively solve the EPON energy saving problem for multicast service. Therefore, there is a great research space for EPON energy saving. It is one of the important challenges to build green color network at present. This paper is summarized and analyzed in this paper. On the basis of internal and external research on PON energy conservation, a new ONU dormancy mode is proposed. Under the different network environment, the combination of network characteristics and ONU dormancy mode is fully considered to effectively reduce the energy consumption of ONU, thus promoting the EPON network to be more energy-efficient. The main work and the new achievements of this paper are as follows: (1) the second chapter is aimed at 1G/10G-EPON network In order to save energy, an energy-saving mechanism based on ONU dormancy and dynamic dual threshold downlink rate selection is proposed. In this mechanism, the ONU can enter a deep dormant state after the end of the uplink transmission. The dormancy time can be dynamically changed according to the upstream traffic and lower ONU energy consumption from the ONU dormancy angle; secondly, the dynamic dual threshold downlink speed can be achieved. The rate selection algorithm uses low energy consumption links to save energy from the angle of downlink rate selection. Based on this mechanism, an energy saving mechanism based on ONU double dormancy state and dynamic dual threshold downlink rate selection is proposed by allowing the idle state of the receiver to sleep in the uplink transmission slot, thus further reducing the energy consumption of ONU. ( 2) the third chapter proposes an energy-saving mechanism based on downlink scheduling and hybrid dormancy, which allows ONU transmitter and receiver to sleep independently, which can effectively reduce the energy waste when the upstream and downlink services are not simultaneously, and combine with the ONU deep dormancy mode. A hybrid dormancy mode is formed. Through a reasonable downlink scheduling, it can further promote energy saving and reduce the delay of downlink packets. (3) the fourth chapter first proposes a hybrid dormant multicast service energy saving mechanism. The feature of multicast service is that the ONU with the same multicast service must receive the service simultaneously, and its upstream business is not Therefore, the proposed mechanism introduces a hybrid dormancy mode, which makes the ONU transmitter and receiver dormant independently and combines the ONU deep dormancy mode to reduce unnecessary energy waste. Through the ONU deep dormancy / wake-up algorithm, this mechanism can reduce the number of ONU wake-up times and reduce the energy consumption of ONU, based on which a mixed dormancy is proposed. Through the ONU deep dormancy / wake-up optimization algorithm, the broadcast service improves the constraints of the ONU wake-up and further reduces the energy consumption of ONU under the premise of guaranteeing QoS. In order to verify and evaluate the performance of the above mechanism, this paper builds a simulation platform using the OPNET simulation software. The simulation results show that compared with the traditional energy saving mechanism, the simulation results show that The proposed mechanism is more energy-efficient and can ensure that the performance of time delay and throughput can be maintained at an acceptable level. The research results of this paper provide theoretical reference and technical support for the development and construction of PON in the future.
【學(xué)位授予單位】：東北大學(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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