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一種自適應光突發(fā)裝配映射機制及性能仿真

陽小龍,  張敏,  李樂民,  王晟

陽小龍, 張敏, 李樂民, 王晟. 一種自適應光突發(fā)裝配映射機制及性能仿真[J]. 電子與信息學報, 2004, 26(5): 789-794.
引用本文: 陽小龍, 張敏, 李樂民, 王晟. 一種自適應光突發(fā)裝配映射機制及性能仿真[J]. 電子與信息學報, 2004, 26(5): 789-794.
Yang Xiao-long, Zhang Min, Li Le-min, Wang Sheng. An Adaptive Map Algorithm to Support QoS for Optical Burst Assembly[J]. Journal of Electronics & Information Technology, 2004, 26(5): 789-794.
Citation: Yang Xiao-long, Zhang Min, Li Le-min, Wang Sheng. An Adaptive Map Algorithm to Support QoS for Optical Burst Assembly[J]. Journal of Electronics & Information Technology, 2004, 26(5): 789-794.

一種自適應光突發(fā)裝配映射機制及性能仿真

An Adaptive Map Algorithm to Support QoS for Optical Burst Assembly

  • 摘要: 分組粗顆粒分類因有良好的擴展性,可作為OBS(Optical Burst Switching)網(wǎng)絡的QoS(Quality of Service)實現(xiàn)基礎。然而OBS網(wǎng)絡因其固有限制而只能支持較少的突發(fā)優(yōu)先級,因此OBS常采用多類別光突發(fā)裝配技術。該文在粗顆粒分類基礎上,提出了一種新的適用于這類裝配的映射機制TQ-Map,即確定某一優(yōu)先級光突發(fā)可以裝配哪些類別分組。自適應性是該機制的突出特點,主要體現(xiàn)在:映射關系能隨各類分組的QoS要求和負載的改變而自動進行調(diào)整。仿真表明:TQ-Map機制的自適應性能有效保證突發(fā)裝配與上層QoS要求相匹配(以分組損失率為衡量指標)。
    Abstract: Because of its scalability, the idea of coarse packet classification can be uti-lized to OBS network. However, due to the limited priorities supported by OBS networks, multi-class burst assembly technique is usually adopted. Hence, a novel map algorithm, i.e. TQ-map, is proposed, which can determine which classes of packets a priority burst can contain, and fit for the multi-class burst assembly. Its most important feature is adaptivity. Compared with S-map, TQ-Map can establish the map relations varying with both traffic condition and QoS requirement, and moreover allocates the burst assembling capacity be-tween packets classes fairly, efficiently and differentially. The only one purpose is to match the QoS requirements of high layers applications. The simulation results show that TQ-Map can effectively achieve the purpose to support QoS.
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  • Verma S, et al.. Optical burst switching: aviable solution for terabit IP backbone. IEEE Network,2000, 14(6): 48-53.[2]Yijun Xiong, et al.. Control architecture in optical burst-switched WDM networks[J].IEEE J. on Selected Areas in Communications.2000, 18(10):1838-1851[3]Yu X, et al.. Study of traffic statistics of assembled burst traffic in optical burst switched networks. Proc. Opticomm2002, Boston, July-August 2002: 149-159.[4]Yoo M, Qiao C. A new optical burst switching protocol for supporting quality of service[J].SPIE Proc.1998, vol.3531:396-405[5]Yoo M, et al.. Optical burst switching for service differentiation in the next-generation optical Internet. IEEE Communications Magazine, 2001, 39(2): 98-104.[6]Yoo M, et al.. QoS performance of optical burst switching in IP-over-WDM networks[J].IEEE J.on Selected Areas in Communications.2000, 18(10):2062-2071[7]Ge A, Callegati F, Tamil L. On optical burst switching and self-similar traffic[J].IEEE Communi cations Letters.2000, 4(3):98-100[8]Blake S, et al.. An architecture for differentiated services. RFC 2475, IETF, December 1998.[9]Vokkarane V, Haridoss K, Jue J P. Threshold-based burst assembly policies for QoS support in optical burst-switched networks. Proc. Opticomm2002, Boston, July-August 2002: 125-136.[10]Vokkarane V, Jue J. Prioritized routing and burst segmentation for QoS in optical burst-switched networks. Proc. OFC2002, Anaheim, March 2002: 221-222.[11]盛友招.排隊論及其在計算機通信中的應用.ISBN7-5635-0306-4,北京:北京郵電大學出版社,1998年,第154頁.
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出版歷程
  • 收稿日期:  2003-01-23
  • 修回日期:  2003-04-28
  • 刊出日期:  2004-05-19

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