GMPLS/PCE-controlled multi-flow optical transponders in elastic optical networks [Invited]

PROJECT TITLE :

GMPLS/PCE-controlled multi-flow optical transponders in elastic optical networks [Invited]

ABSTRACT:

Elastic optical networks aim at considerably improving network spectrum potency by using a flexible grid, while ancient optical transport networks operate with fastened frequency spacing. In such versatile networks, connections are accommodated into thus-called ???frequency slots,??? that are dynamically established depending on consumer data rates and selected signal modulation formats. Key enablers to develop such a network infrastructure are bandwidth variable optical cross-connects (BV-OXCs) and BV transponders. For the latter, a multi-flow optical transponder (MF-OTP) is being thought of as an appealing solution as a result of of its support of high-rate super-channels and its elasticity, where optical connections can be reconfigured flexibly consistent with the required traffic requests. The dynamic choice (path computation) and automatic network configuration of each optical spectrum and MF-OTP resources are handled by a management plane entity. Herein, a distributed Generalized Multi-Protocol Label Switching (GMPLS) management plane combined with an active Path Computation Component (PCE) are adopted for the dynamic instantiation of flexgrid optical connections. To fully management the MF-OTP???s attributes and capabilities, specific extensions are required for each GMPLS routing and signaling.We propose and experimentally validate such extensions by considering two data models: partial and full. The difference between the models lies in info related to optical spectrum standing (carried by the full model) on the MF-OTP interfaces attached to the BV-OXCs. Furthermore, a completely unique on-line routing, spectrum, and modulation assignment (RSMA) algorithm is conceived. The RSMA adopts both models to compute ways by making an attempt to optimize the spectral link and MF-OTP resources when dynamically serving flexgrid connections. The experimental evaluation compares the models' attained RSMA performance with respect to the blocking probability likewise because the setup and path comp- tation delays.

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