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波分复用技术(WDM)在主干传送网应用越来越普遍,WDM网络技术的研究也获得了迅速发展,综述了当前主干WDM网络的最新研究进展和发展趋势。 相似文献
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首先描述了目前多种光传输体制并存在的局面,然后分别阐述了SDH和DWDM的技术演进以及光网络OTN的核心技术,接着讨论了SDH和DWDM/OTN对IP业务的适应,其中提出了融合节点技术,最后简要论述了OTDM和光孤子的技术问题。 相似文献
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本文提出了一种新的WDM光网络功率管理方案,即同时考虑同频串扰和自发辐射噪声的总功率。给出了方案的数学模型,并进行了仿真计算。结果表明,同频串扰对WDM光网络的规模和光信号的质量有着重要的影响。对于使用机械光开关的WDM关网,串扰对系统的影响程度主要取决于解复用器的隔离度。对串扰较小的网络,提高输出EDFA的增益和监测点光功率设定值会提高光信号质量。 相似文献
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Future photonic transport networks based on WDM technologies 总被引:4,自引:0,他引:4
It is expected that the explosion in Internet traffic implies a paradigm shift from a voice network to a data-centric network. The first and most important requirement of future transport networks is the large bandwidth transport capability which enables the paradigm shift. In addition, requirements for new service attributes are becoming more tangible. Furthermore, high reliability will be indispensable because the multimedia network will be the basis for the information society. To develop the robust and efficient networks that satisfy the requirements above, new network architectures and technologies should be developed. Photonic networks employing dense WDM technologies appear to be the solution. In this article, first the basic concept of the future photonic network is depicted. Next, the capability of large-capacity fiber transmission is shown. The critical degradation factor of fiber nonlinearity is analyzed, and the effectiveness of distributed amplification is quantitatively demonstrated. Furthermore, advances in fiber amplifiers which greatly widen the usable fiber window are shown. Other key technologies such as absolute frequency referencing and multiple channel frequency management techniques are also discussed 相似文献
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WDM光传送网的设计与操作 总被引:1,自引:1,他引:0
综述一WDM光传送网的设计和操作问题,首先介绍了一些基本概念,然后给出了有关WDM光传送网的不同问题及其设计方法,最后描述了对WDM光传送网进行操作的一此算法。 相似文献
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在WDM光网络中,将波长路由算法(Routing and Wavelength Assignment,RWA)与服务等级约定(Service Level Agreement,SLA)结合在一起研究,以此来确保高等级业务在传输时具有更好的可靠性和低阻塞率,并对实验数据进行仿真分析. 相似文献
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WDM网络中支持QoS的路由与波长分配算法 总被引:1,自引:1,他引:1
针对波分复用(wDM)网络中的路由与波长分配问题。提出了一种支持服务质量(QoS)的约束搜索算法。基于多目标规划模型,这种搜索算法可为网络各节点创建路由表,根据路由表信息求出非支配路径集合,从而一次性完成寻找路由和分配波长两项任务。仿真实例证明了该算法的有效性。 相似文献
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With the rapid development of optical networking technology, it is now a realizable technique to support point-to-multipoint connections directly on the optical layer, giving rise to optical multicast. The topic of optical multicast has attracted much enthusiasm in recent years for the reason that it will not only make full use of the abundant bandwidth provided by optical fibers, but also take full advantage of multicast over the traditional point-to-point connection approach. In this paper, we present a comprehensive review of optical multicast over wavelength-routed WDM networks, covering the development of both data plane and control plane designs. In particular, we provide an up-to-date state-of-the-art review on the multicast routing and wavelength assignment problem. To the best of our knowledge, this is the most thorough and comprehensive review conducted so far on this topic in the literature. 相似文献
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针对WDM光网络多播动态路由分配问题,提出了一种多约束条件下的路由分配算法.对WDM光网络中的多约束因素进行了系统分析,阐述了算法的实现步骤,并对CERNET和NSFNET两种网络进行了仿真实验和对比. 相似文献
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