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讨论了IP over WDM网络中的三种不同的光交换技术并分别对这三种交换技术中的QoS机制做了比较和分析。 相似文献
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光突发交换与交换粒度介于光电路交换(即波长交换)和光分组交换之间的一种光交换模式,因为它克服了光电路交换和光分组交换的缺点,具有很大的技术优势,很有可能成为下一代互联网骨干网络的核心技术,真正实现光子互联网。本介绍光突发交换技术的基本原理,讨论了光突发交换的协议,突发封装和在IP骨干网中的应用等问题,并指出在这项技术得到应用之前需要解决的诸多课题。 相似文献
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光纤传输技术和光网络技术的发展使得光网络成为现代高速宽带网络的基础骨干网。文章论述了三种光交换技术,并详细分析了光突发交换网络技术原理、交换结构及相关网络协议。在目前光器件和光信息处理方式未取得重大突破之时,光突发交换技术集成光电路交换和光分组交换的优势并且实现方式可行,能满足现有大容量、高速率的多媒体信息交换与传输,将成为下一代光IP骨干网的核心技术。 相似文献
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随着电传送网技术向光传送网技术的演进.光层的联网能力越来越强,出现了几种光域上的交换技术:光线路交换/波长路由、光分组交换、光突发交换及为解决光分组在传送时出现丢失而重组时出现次序混乱等问题提出来的一种新颖的光分组流交换技术。下文将对这几种交换技术及其特点进行逐一介绍。 相似文献
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一种新的光交换技术——光标记交换技术 总被引:1,自引:0,他引:1
介绍了光标记交换这种光子交换新技术,叙述了光标记交换技术的优点,总结了目前提出的几种光标记交换方法,指出了各种方法的优缺点。 相似文献
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光纤传输技术和光网络技术的发展使得光网络成为现代高速宽带网络的基础骨干网。光突发交换是一种介于光路交换和光分组交换之间的很有发展潜力的交换模式,它结合了两者的优势又克服了两者的缺点。重点阐述了光突发交换的概念和关键技术,并介绍了光突发交换目前的研究进展。 相似文献
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论述了IP over WDM技术及其特点,并指出该技术面临的主要挑战是网络必须稳定可靠,且要解决服务质量保障及链路管理问题。 相似文献
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Yang Zongkai Ou Liang Tan Xiansi 《电子科学学刊(英文版)》2006,23(4):627-631
Time-slotted optical burst switched network is a potential technique to support IP over Wavelength Division Multiplexing (WDM) by introduce Time Division Multiplexing (TDM) channel to Optical Burst Switching (OBS) technology. This paper presents a framework to evaluate blocking performance of time-slotted OBS networks with multi-fiber wavelength channels. The proposed model is efficient for not only single class traffic such as individual circuit switch traffics or best-effort traffics but also mixed multi-class traffics. The effectiveness of the proposed model is validated by simulation results. The study shows that blocking performance of multi-fiber TS-OBS network is acceptable for future Internet services. 相似文献
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IP voer WDM光网络及其生存性问题讨论 总被引:4,自引:2,他引:2
本文介绍了IP voer WDM光网络的演进过程与发展趋势;讨论了其生存性问题,包括光层生存性有关概念、分类及各自的优缺点,IP/MPLS层与WDM层联合生存机制的必要性以及这种联合机制需要解决的竞争问题=带宽资源共享问题和失效扩散问题等。 相似文献
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《Optical Fiber Technology》2013,19(4):309-318
Overlay IP/MPLS over WDM network is a promising network architecture starting to gain wide deployments recently. A desirable feature of such a network is to achieve efficient routing with limited information exchanges between the IP/MPLS and the WDM layers. This paper studies dynamic label switched path (LSP) routing in the overlay IP/MPLS over WDM networks. To enhance network performance while maintaining its simplicity, we propose to learn from the historical data of lightpath setup costs maintained by the IP-layer integrated service provider (ISP) when making routing decisions. Using a novel historical data learning scheme for logical link cost estimation, we develop a new dynamic LSP routing method named Existing Link First (ELF) algorithm. Simulation results show that the proposed algorithm significantly outperforms the existing ones under different traffic loads, with either limited or unlimited numbers of optical ports. Effects of the number of candidate routes, add/drop ratio and the amount of historical data are also evaluated. 相似文献
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A summary of research on survivable IP networks overlaid over WDM networks is presented. The WDM networks are part of optical transport service providers, who lease lightpath services to institutions with IP networks. The lightpath services realize IP links for IP networks, and they have different protection grades such as unprotected and protected. The research included considering new network survivability requirements and incorporating them into network design problems. The cost of survivable IP over WDM networks is compared over three scenarios. Each succeeding scenario has the WDM network provide more flexible services, and the IP and WDM networks become more integrated. We consider the problem of setting up lightpaths for an IP network so that the network will remain connected after a fiber link fault. Algorithms to find the lightpaths and minimize cost are given. The network costs under the three scenarios are compared by simulations. 相似文献
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近几年来,由于低损耗单模光纤技术的进步,光网络已经被用来满足各种应用的需求。波分复用(WDM)技术被认为能更有效地利用巨大的光纤带宽。IP over WDM技术是网络发展的一个重要方向。本文提出了一种新型混合模型网络结构,并进行了模拟仿真研究,结果表明此技术是可行的。 相似文献