Abstract
Abstract Recently, lots of datacenters (DCs) have been built to enhance reliability and expand processing ability for computing service in cloud computing. Furthermore, spatial division multiplexing (SDM) technology and elastic optical network (EON) are also considered as the candidate solutions to solve the requirements of huge bandwidth and flexible connections. However, it is much more difficult to use few mode fiber (FMF) in DCs-based EON due to the existing modal crosstalk among different modes. Faced with the challenges, we propose a routing, spectrum, mode and time assignment algorithm to decrease the blocking probability and increase the spectrum utilization. To deal with the problem more efficiently, we propose a method called flexible sliding three-dimensional block (3D block) which represents the dimensions of spectrum, space and time in our algorithm. 3D block slides in the resource space to find out proper resources. The simulations are conducted on datacenter networks (DCNs) and the results show that lower blocking probability and higher spectrum utilization are achieved by efficiently utilizing the spectrum, space and time domains.
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