IP/MPLS over WDM网中的动态选路和波长分配算法
Dynamic routing and wavelength assignment algorithms in IP/MPLS over WDM networks
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摘要: 该文研究了IP/MPLS over WDM网中，利用综合路由法为到达的业务流建立标签交换路径(LSP)时，如何选择是在WDM层为它新建一条光路，还是利用现有的逻辑IP链路来满足其要求，提出一种带宽碎片消除的策略，该策略在决定是否利用逻辑IP链路来建立LSP时，总是尽量减少造成带宽碎片，从而可以有效提高全网的资源利用率，仿真结果表明带宽碎片消除策略可以进一步改善综合路由算法的性能。Abstract: One of the key issues in integrated dynamic IP and wavelength routing algorithm is how to determine whether it is better to route an arriving Label Switch Path (LSP) estab-lishment request over the existing topology or to open new wavelength paths, A new scheme, Bandwidth Defragment Method (BDM), is presented in this paper. It makes full use of the statistic information of the networking link-state and resource availability to determine how to route an arriving LSP request. The integrated dynamic Routing and Wavelength Assign-ment (RWA) algorithm based on BDM can reduce the numbers of bandwidth fragment and increase the utility of network resource. Simulation results show that the scheme can improve the performance of the network significantly.
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N. Ghani, et al., On IP-over-WDM integration, IEEE Commun. Mag., 2000, 38(3), 72-82.[2]A. Banerjee, et al., Generalized multiprotocol label switching: An overview of routing and management enhancements, IEEE Commun. Mag, 2001, 39(1), 2-8.[3]D. Awduce, et al., Multiprotocol lambda switching combining MPLS traffic engineering control with optical crossconnects, IEEE Commun. Mag., 2001, 39(3), 111-116.[4]S. Seetharaman, et al., IP over optical networks: A summary of issues, Internet Draft, draft-osu-ipo-mpls-issues-02. txt, Apr. 2001.[5]K. Kompella, et al., OSPF extensions in support of generalized MPLS, Internet Draft, draftkompella-ospf-gmpls-extensions-01. txt, Feb. 2001.[6]M. Kodialam, et al., Integrated dynamic IP and wavelength routing in IP over WDM networks,IEEE INFOCOM, Anchorage, Alaska, Apr. 2001, 358-366.[7]S. Suri, et al., Profile-based routing: a new framework for MPLS traffic engineering, Proc. Quality of future Internet Services, Lecture Notes in Computer Science 2156, Berlin, Springer Verlag, Sept.2001, 138-149.[8]徐世中,李乐民,王晟,多光纤波分复用网动态路由和波长分配,电子学报,2000,28(7),23-27. -
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