IP/MPLS over WDM網中的動態(tài)選路和波長分配算法
Dynamic routing and wavelength assignment algorithms in IP/MPLS over WDM networks
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摘要: 該文研究了IP/MPLS over WDM網中，利用綜合路由法為到達的業(yè)務流建立標簽交換路徑(LSP)時，如何選擇是在WDM層為它新建一條光路，還是利用現有的邏輯IP鏈路來滿足其要求，提出一種帶寬碎片消除的策略，該策略在決定是否利用邏輯IP鏈路來建立LSP時，總是盡量減少造成帶寬碎片，從而可以有效提高全網的資源利用率，仿真結果表明帶寬碎片消除策略可以進一步改善綜合路由算法的性能。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,李樂民,王晟,多光纖波分復用網動態(tài)路由和波長分配,電子學報,2000,28(7),23-27. -
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