节点文献
10Gbps以太无源光网络关键技术与应用研究
Research on Key Technologies and Applications of 10Gbps Ethernet Optical Networks
【作者】 江国舟；
【导师】 刘德明；
【作者基本信息】 华中科技大学 ， 电子科学与技术， 2009， 博士
【摘要】 作为提供宽带及其它接入服务的未来基础架构,无源光网络(PON)已日益普及。诸如高清IPTV及高清VoD等业务的应用,驱动着接入网向更高带宽的方向发展。新兴的IEEE 802.3av(10G-EPON)标准是一种最新、速度最快的时分多址(TDMA)PON技术,具有十分广阔的发展前景。本论文在国家“十五”863资助课题的基础上,对其展开了深入的理论和实验研究。本论文主要内容如下:(1)研究了链路的功率预算模型,通过计算与分析得出了PDM层的功率预算值,据此结果对10G-EPON的物理介质相关子层(PDM)进行了分类;并提出了10G-EPON的一种波长分配方案,从而保证了10G-EPON的后向兼容性。(2)对FEC的编码理论进行了分析与计算,根据计算结果选择了10G-EPON中FEC的编码方式。在RS(223,255)的编码的基础上,定义了易于实现同步的10G-EPON中FEC的帧结构,并对FEC在10G-EPON的具体实现进行了详细论述。(3)对双重速率的10G-EPON的协议栈展开了研究,提出了10G/1G共存EPON的协议栈模型;并对10G/1G共存EPON的突发定时进行了分析与计算,得出了10G-EPON的定时参数与1G-EPON保持一致的结论。(4)在综合分析研究现有的动态带宽分配算法基础上,提出基于两阈值上报的最小保证带宽的动态带宽分配算法,适用于10G/1G共存EPON的应用,并进行了结果仿真。(5)对10G-EPON的QoS进行了研究,提出了保证10G-EPON的安全性的解决办法;在对比分析各种QoS技术的基础上,设计了10G-EPON的QoS方案,并对其具体实现进行了详细论述。(6)对1G-EPON互通性进展进行了介绍,并总结了互通性产生的根源;针对产生互通性问题的因素,提出了利用扩展的OAM解决10G-EPON互通性的方案。
【Abstract】 As the infrastructure for broadband and other access services in the future,Passive Optical Networks(PON) has become increasingly popular.The application of highdefinition IPTV and high-definition VoD(Video-On-Demand) brings about the access network with larger bandwidth.The emerging IEEE 802.3av(10G-EPON) standard, being the latest and fastest time-division multiple access(TDMA) PON technology,has vast potential for future development.Supported by the National High Technology Research and Development Program of China(863 Program) project "Gigabits Ethernet Based on Passive Optical Networks",the researchers in this dissertation launch a theoretical and experimental study on the 10G-EPON.The whole structure of this thesis is as follows:(1) Studied the link power budget model,and analysis obtained by calculating the PDM layer power budget value,whereby the result of the 10G-EPON physical media dependent sublayer(PDM) have been classified;and made a 10G-EPON wavelength assignment of a program,thereby ensuring the 10G-EPON for backward compatibility.(2) Through the theoretical analysis and calculation on FEC conding theory, according to calculations chose the 10G-EPON in the FEC encoding.Based on the encoding of the RS(223,255),we define the FEC frame structure in 10G-EPON which enables easier synchronization,and elaborate the realization of FEC in 10G-EPON.(3) We propose the protocol stack model in which 10G and 1G can coexist in EPON. In addition,we conclude that the timing parameter of 10G-EPON conforms with those of 1G-EPON.(4) Based on the comprehensive study of existing dynamic bandwidth allocation algorithm,we propose another one which guarantees minimum bandwidth and is applicable to 10G/1G EPON,and we carry out simulation results.(5) We propose the solution to guarantee the security of 10G-EPON and design a QoS strategy on which we will give detailed introduction. (6) We introduce the interoperability of 1G-EPON and get to the root cause of it.We also propose the scheme of realization of the 10G-EPON interoperability.