【作者】 张雷；

【导师】 李乐民；

【作者基本信息】 电子科技大学 ， 通信与信息系统， 2002， 博士

【摘要】 信息社会的来临，正在改变我们生活中的许多方面，对信息的需求和依赖是这个社会的一个标志。因特网的迅猛发展和新业务的不断出现导致对带宽的需求越来越大。现有的以SONET／SDH技术为主的广域骨干网络越来越不能适应这种形势，迫切需要一种新的性价比更高的技术来满足人们对信息的需求。光的波分复用技术(WDM：Wavelength Division Multiplexing)为解决这种矛盾提供了一个很好的方案。WDM技术对光纤巨大带宽的充分利用可以导致传输数据的价格大幅度的降低，这使它已经成为广域骨干网络中最具吸引力的技术，而且可以预言在不远的将来，它还会在其他网络领域中得到更广泛的应用。 WDM网络中，波长变换技术是一项关键技术，然而却一直备受争议。波长变换技术具有可以改善网络的性能，简化网络的控制等一系列的优点，但是由于目前技术的限制，制造理想的全光波长变换器还很困难，而且波长变换器仍处于实验室制造阶段，当它商用化时，价格将较昂贵。鉴于技术和价格的限制，有限范围波长变换的研究和稀疏节点波长变换的研究应运而生。本文研究主要集中在3个方面： (1)基于有限范围波长变换器的研究，具体内容包括：基于XGM(Cross-Gain Modulation，交叉增益调制)有限范围波长变换器的路由与波长分配算法的研究；XGM和FWM(Four-Wave Mixing，四波混频)有限范围波长变换器网络的性能分析；备用路由与波长分配算法对有限范围波长变换器网络性能影响的研究。对应本文第二章到第四章。 (2)具有生存性的WDM网络中波长变换器的研究，具体内容包括：动态业务量情况下，具有生存性的WDM网络中，波长变换器与可调谐光收发器的性能研究；XGM和FWM有限范围波长变换器对具有生存性的WDM网络的性能影响。对应本文第五章和第六章。 (3)基于稀疏节点波长变换器的研究，具体内容包括：WDM网络中确定波长变换器的位置与数量的启发式算法；波长变换器链路共享型和波长变换器节点共享型的交叉连接设备的性能研究。对应本文第七章和第八章。 本文第一章中主要介绍了WDM技术产生的背景、现状和发展。对WDM网络中的各种关键技术，包括器件和网络的关键技术，波长变换器技术，都做了详细的介绍，最后还讨论了未来光网络的发展以及波长变换技术的应用前景。 中 文摘要一 第二章主要研究了XGM有限范围波长变换器在WDM网络中的性能，设计了3种适合与XGM波长变换器的路由与波长分配算法，通过在不同网络中的仿真来比较3种算法的性能差异，研究得出，XGMoF沼W）算法的阻塞率性能和公平性性能最佳，而且算法的复杂度也不高。本章最后对提高网络公平性做了一些努力。 第三章研究了 FWM和 XGM有限范围波长变换器在 WDM网络中的性能，通过理论上模型分析和实际网络中的仿真，对二者在网络中的性能做了详尽的分析，研究得出，尽管XGM波长变换器的性能仅相当于变换范围很小的FWM波长变换器，但是它距离理想的全光波长变换器的性能并不太远。 第四章研究了备用路由与波长分配算法对有限范围波长变换器WDM网络的性能影响，主要是研究FWM和 XGM波长变换器。通过在不同网络中的仿真，研究了备用路由数目对二者在网络中性能的影响。 第五章研究了生存性WDM网络中波长变换器对网络性能的影响，主要比较了动态业务量情况下，可调谐光收发器和波长变换器对网络性能的影响，通过在不同网络中的仿真，得出了与静态业务量情况下不同的结论。 第六章研究了有限范围波长变换器对具有生存性的WDM网络的性能影响，有限范围波长变换器包括FWM和XGM波长变换器。设计了考虑生存性时的路由与波长分配算法，通过在网络中的仿真比较了二者的网络性能差异。 第七章研究了如何在WDM网络中的部分节点的OXC的部分端口上装备波长变换器。设计了3种启发式算法，通过在不同网络中的仿真比较了3种算法的性能。研究得出，完全可以在部分节点的OXC的部分端口上装备波长变换器来达到最佳的性能。 第八章对二种装备波长变换器的OXC的性能做了研究。提出了一种优化配置波长变换器的方法，通过在网络中的仿真比较了2种OXC在网络中的性能差异。 第九章对仿真环境做了简要的介绍。最后是全文总结。更多还原

【Abstract】 The information society is now changing many aspects of our life. In this society, the demand and dependence on the information are the main symbols. With the coming of the "INTERNET era", a lot of new information service will be in use and the need for the bandwidth will become more and more. These cause the mismatch between the need and the traditional backbone network in which the SONET/SDH technology is dominant. It is urgent of the service provider to find another technology that has more performance-to-price than ever to overcome this mismatch. The WDM (Wavelength Division Multiplexing) technology is now coming on the "stage" to satisfy the urgent need. Because the WDM technology can fully utilize the enormous bandwidth of the optical fiber, the cost for transfering data can be greatly decreased. This enables WDM technology to be the most attractable technology in wide backbone network. It is predicted that in the near future, the WDM technology will be widely used in other networks.In WDM networks, wavelength conversion is a key technology, but it is always the focus of the contention. Although the wavelength conversion can improve the performance of WDM networks, simplify the control, and so on, it is difficult to manufacture the ideal all-optical wavelength converter due to the limit of the technology. And more the technology is now in the laboratory, when it is on commercial use, the price will be very expensive. How to overcome the disadvantages of the technology? The technology of manufacturing the all-optical wavelength converter with limited-range conversion and the sparse distribution of wavelength converters are under research. This paper is concentrated on the following three aspects:(1) The researches about limited-range wavelength conversion, the contents include: the research about the RWA (Routing and Wavelength Assignment) of XGM (Cross-Gain Modulation) wavelength converters; the performance analysis of WDM network with limited-range wavelength converters, which includes XGM and FWM (Four-Wave Mixing) wavelength converters; the research about the influence of the alternate RWA to the performance of WDM networks with limited-range wavelength converters. The details are from chapter 2 to chapter 4.(2) The researches about survivable WDM networks. The contents include: the influence of wavelength converters and tunable transceivers to the performance of survivable WDM networks under the condition of dynamic traffic; the influence of XGM and FWM wavelength converters to the performance of survivable WDM networks. The details are in chapter 5 and chapter 6.(3) The researches about the sparse distribution of wavelength converters, the contents include: the heuristic algorithm to decide the number and location of wavelength converters; the performance comparison of the two different OXCs (Optical Cross-Connect): Share-per-Link OXC and Share-per-Node OXC. The details are in chapter 7 and chapter 8.The background, status and development of the WDM technology are described in chapter 1. Many key technologies in WDM network, including the technologies of manufacturing the elements, networking and wavelength conversion, are described in this chapter. At the end of thechapter, the development of the future all-optical network and the employment of wavelength converters in the future all-optical network are introduced.The performance of XGM wavelength converters is studied in chapter 2. Three RWA algorithms for XGM wavelength converters are proposed, by simulation in different kinds of networks, the performance of three algorithms are compared, the results show that the performance of the XGM (FF/SW) algorithm is the best and its complexity is not high. At the end of the chapter, the effort to improve the fairness of WDM networks with XGM wavelength converters is performed; the result shows that it is not effective.In chapter 3, the performance of WDM networks with limited-range wavelength converters that include FWM and XGM wavelength converters is deeply in更多还原