以太无源光网络节能机制与算法研究
发布时间：2018-07-24 17:48
【摘要】：随着全球温室效应不断加剧,节能减排势在必行。宽带接入网作为“最后一公里”有效解决方案之一,其能耗约占全网能耗的75%。其中,具有高带宽、高稳定性的无源光网络(Passive Optical Network, PON)以其远程节点的无源特性成为当前最可行且节能的宽带接入方案。作为一种成熟的PON技术,以太无源光网络(Ethernet PON, EPON)近年来已经成为亚太地区部署最广泛的宽带接入网络之一。随着用户数目和业务需求不断增长,PON网络能耗也随之急剧增加。因此,如何有效降低PON网络,尤其是EPON网络能耗,已成为一个极具学术和应用价值的研究热点。目前,EPON节能研究多采用休眠低负载光网络单元(Optical Network Unit, ONU)的方法,但通常是休眠整个ONU,即发送机和接收机必须同时开启或关闭。该方法不够灵活,不仅节能效率低,还会降低服务质量(Quality of Service, QoS)。此外,当前的节能方法大多针对单播业务,无法有效地解决面向多播业务的EPON节能问题。因此,EPON节能还存在很大的研究空间,是当前构建绿色网络的重要挑战之一本论文在总结和分析国内外关于PON节能研究的基础上,提出了新的ONU休眠模式。在不同网络环境下,充分考虑将网络特性与ONU休眠模式相结合,有效降低ONU能耗,从而促进EPON网络更加节能。本论文的主要工作和取得的创新成果如下：(1)第2章针对1G/10G-EPON网络节能问题,首先提出了一种基于ONU休眠和动态双阈值下行速率选择的节能机制。在该机制中,ONU在上行传输结束后可进入深度休眠状态,其休眠时间可根据上行业务量动态变化,从ONU休眠角度降低ONU能耗；其次,通过动态双阈值下行速率选择算法,在低业务负载时使用低能耗链路,从下行速率选择的角度节能。基于该机制,通过允许上行传输时隙内处于空闲状态的接收机休眠,提出了基于ONU双休眠状态和动态双阈值下行速率选择的节能机制,从而进一步降低ONU能耗。(2)第3章针对上行业务和下行业务不对等的EPON节能问题,提出了一种基于下行调度和混合休眠的节能机制。该机制允许ONU的发送机和接收机独立休眠,有效减少上行业务和下行业务不同时存在时的能量浪费,并与ONU深度休眠模式相结合构成混合休眠模式。通过合理的下行调度,既可进一步促进节能又可降低下行数据包时延。(3)第4章首先提出了一种基于混合休眠的多播业务节能机制。多播业务的特点是：有相同多播业务的ONU必须同时接收该业务,而其上行业务不能同时传输。由此,所提机制引入混合休眠模式,使ONU的发送机和接收机可以独立休眠,并结合ONU深度休眠模式,减少不必要的能量浪费。通过ONU深度休眠／唤醒算法,该机制可降低ONU唤醒次数,从而降低ONU能耗。据此,提出基于混合休眠的多播业务改进节能机制,通过ONU深度休眠/唤醒优化算法,增加了ONU唤醒的约束条件,在保证QoS的前提下,进一步降低ONU能耗。为验证和评估上述机制的性能,本文利用OPNET仿真软件搭建了仿真平台。仿真结果表明,与传统节能机制相比,本文所提机制更加节能,并且能够保证业务的时延和吞吐量等性能维持在可接受水平。本文的研究成果对未来PON的发展和建设提供了理论参考和技术支撑。
[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.
【学位授予单位】：东北大学
【学位级别】：博士
【学位授予年份】：2014
【分类号】：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.
【学位授予单位】：东北大学
【学位级别】：博士
【学位授予年份】：2014
【分类号】：TN929.1
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