Performance of Elastic Optical Network with Spectrum Slicing for Fragmented Bandwidth Allocation

Abstract

This paper proposes a spectrum allocation scheme to reduce the number of blocked requests for an elastic optical network (EON) in which an original spectrum band is allowed be sliced. In a general EON, a spectrum allocation must not conflict two constraints. First, the allocated spectrum band must be continuous from a source to a destination if no spectrum converter is applied. Second, spectrum slots for the allocated spectrum band must be consecutive in a link. Recently, a technology to slice and to recover the spectrum band has been invented. The second constraint of the general EON can be broken. The proposed scheme applies a slicing technology in the EON. An algorithm to allocate the spectrum is introduced. Results show that the request blocking of the proposed scheme reduces up to 82% and 13% in a low traffic and high traffic, respectively, compared to the general EON.