Dynamic Sub-path Protection Algorithm for WDM Mesh Networks with Traffic Grooming Capabilities
He Rong-xi①②; Wen Hai-bo②; Wang Guang-xing①; Li Le-min②
①Info.Science and Engineering College, Northeastern, Univ., Shenyang 110004, China;②National Key Lab of Broadband Optical Fiber Transm. and Comm. Net., UEST of China, Chengdu 610054, China
Abstract：In Wavelength Division Multiplexing (WDM) optical networks, lightpaths are high-capacity all-optical channels. A single fiber failure can lead to the failure.of all the lightpaths traversing the fiber, and results in significant loss of traffic. Therefore, effective survivability mechanism is needed to minimize the data loss. This paper proposes an Adaptive Sub-Path Protection (ASPP) algorithm for WDM mesh networks with traffic grooming capabilities. The idea of ASPP is to segment each working path into several equal length sub-paths, and to compute their protection paths respectively. Based on dynamic traffic with different load, the performance of ASPP has been compared with traditional protection approaches via simulations. The results show that ASPP can make the tradeoffs between the resource utilization and recovery times.
2004, Vol. 26 
