Optimization Design of Three-stage Multi-granularity Optical Cross-connects
三阶多粒度光交叉连接的优化设计研究

A dynamic multi-granularity traffic model is built in the backbone network adopting dense wavelength division multiplexing(DWDM) technology.Furthermore,the blocking performance including blocking probability and bandwidth blocking ratio of the optical network which consists of three-stage multi-granularity optical cross-connects based on coarse granularity(i.e.,fiber and band) and fine granularity(i.e.,wavelength) is studied.The associated architecture parameters in the three-stage multi-granularity optical cross-connects(MG-OXC) and system parameters in the system are analyzed in detail and optimized by simulations.The proposed optimization design significantly reduces the node complexity and improves the blocking performance of arriving requests,which translates to smaller device size and lower cost in optical networks.