tailieunhanh - A study on coarse granular routing elastic optical networks

We have studied coarse granular routing elastic optical network that is based on our recently developed coarse granular OXC architecture. The network can exploit both elastic optical networking and coarse granular routing technologies to cope with the trade-off between the link cost and the node cost in order to build a spectrum-and-cost efficient solution for future Internet backbone networks. | A STUDY ON COARSE GRANULAR ROUTING ELASTIC OPTICAL NETWORKS Hai-Chau Le and Ngoc T. Dang Posts and Telecommunications Institute of Technology Hanoi Vietnam Computer Communication Labs The University of Aizu Aizu-wakamatsu Japan Abstract We have studied coarse granular routing elastic optical network that is based on our recently developed coarse granular OXC architecture. The network can exploit both elastic optical networking and coarse granular routing technologies to cope with the trade-off between the link cost and the node cost in order to build a spectrum-and-cost efficient solution for future Internet backbone networks. Firstly we have introduced our developed coarse granular optical cross-connect OXC architecture that enables routing bandwidth-flexible lightpaths coarse-granularly. We then evaluated the hardware scale requirement and the spectrum utilization efficiency of the network with typical modulation formats under various network and traffic conditions. Finally numerical evaluation was used to verify the spectrum utilization efficiency of the coarse granular routing elastic optical network in comparison with that of conventional WDM network and traditional elastic optical network. Keywords Optical network elastic optical network optical cross-connect spectrum selective switch routing and spectrum assignment. I. INTRODUCTION Over last decade Internet traffic has been increasing rapidly. It still tends to explode and go beyond with newly emerged high-performance and bandwidth-killer applications such as 4k HD ultra-HD video e-Science and cloud grid computing 1 2 . To deal with the explosive traffic increment and to support further mobility flexibility and bandwidth heterogeneity the necessity of cost-efficient and bandwidth-abundant flexible optical transport networks has become more and more critical 3 4 . To scale up to Terabit s current optical transport networks based on current WDM technology with a fixed ITU-T frequency grid will encounter .