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Dynamic protected lightpath provisioning in mesh WDM networks
作者姓名:祝国龙  曾庆济  许田  叶通  杨俊杰
作者单位:The State Key Laboratory on Fiber-optical Local Area Networks and Advanced Optical Communication Systems,The State Key Laboratory on Fiber-optical Local Area Networks and Advanced Optical Communication Systems,Guided-Wave Optoelectronics Laboratory,The State Key Laboratory on Fiber-optical Local Area Networks and Advanced Optical Communication Systems,The State Key Laboratory on Fiber-optical Local Area Networks and Advanced Optical Communication Systems Shanghai Jiao Tong University,Shanghai 200030,Shanghai Jiao Tong University,Shanghai 200030,Shanghai Jiao Tong University,Shanghai 200230,Shanghai Jiao Tong University,Shanghai 200030,Shanghai Jiao Tong University,Shanghai 200030
基金项目:This work was supported by the National Natural Science Foundation of China under Grant No. 69990540 and 90304002.
摘    要:This paper investigates the problem of dynamic protected lightpath services provisioning in optical mesh networks employing wavelength division multiplexing (WDM). A variety of schemes for dynamic protected services provisioning have been proposed, supporting a range of tradeoffs among restoration speed, capacity efficiency, and scalability. In this paper, we propose a novel scheme, called p-cycles-based maximum protected working capacity envelope (PC-MPWCE), which can offer an attractive combination of features: ring-like speed, mesh-like capacity efficiency, and good scalability. To evaluate the performance of PC-MPWCE, we compare it via simulation with 1 + 1 automatic protection switching (APS) and two well-known shared backup path protection (SBPP) on NSFNET. Our simulation results show that PC-MPWCE can achieve much better blocking performance than 1 + 1 APS, and perform the similar blocking performance and capacity efficiency as SBPP.

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