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Research on Survivability of Multi-granularity Traffic Grooming Optical Network

Author: YuFei
Tutor: ShenJianHua
School: Nanjing University of Posts and Telecommunications
Course: Communication and Information System
Keywords: Multi-granularity optical networks Survivability Traffic Grooming Shared restoration Multiple fault protection
CLC: TN929.1
Type: Master's thesis
Year: 2012
Downloads: 29
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Abstract


The introduction of intelligent optical network GMPLS control plane with support for multi - granularity switching and dynamic bandwidth , effectively improve the optical network to provide business intelligence and flexibility . Multi- granularity optical network survivability is one of the core technology of the intelligent optical network , the thesis support multi-granularity traffic grooming optical network survivability , theoretical research , modeling analysis and numerical simulation methods . The paper first briefly optical network development and application of the status quo , to discuss the significance of multi-granularity optical network survivability , and a detailed analysis of the multi- granularity optical network node architecture , GMPLS control plane and multi-granularity cross-connect technology . GMPLS Recovery process of multi- granularity optical network survivability strategy , traffic grooming and survivability traffic grooming technology . (WBRWBF) and wavelength fault based on the the waveband path of recovery for a wave with fault recovery path based on the wavelength (WRWF) and existing MG-ON link failure recovery mechanisms such as the pros and cons of paper presents a GMPLS-based multi- granularity optical network improvements sharing recovery mechanism ( GSR ) . When a network link failure , GSR can be differentiated to restore the fault of the different particle size business to improve the performance of network survivability . Simulation results show that : the small port of network nodes , GSR algorithm with respect to the successful recovery rate of the traditional WBRWBF WRWF algorithm significantly improved ; And when the band granularity G greater the number of ports of the network node is the less . The paper also support traffic grooming multiple fault protection algorithm . Shared path protected optical network problem of the existence of \Simulation comparison algorithm with traditional AWPRF GBR and classic GBR-ILP algorithm performance , the results showed that : AWPRF algorithm recovery failure business protection and weak protection of the number of requests is significantly less than the traditional standby reset algorithm (GBR) , ; For GBR-ILP algorithm , AWPRF algorithm light load recovery rate performance improvement ; heavy duty recovery performance is not ideal , but can significantly reduce the computational complexity.

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