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Study of solutions for automatic reconfiguration of future transport networks based on flexible optical layer

Abstract : Expanding the transport optical network using equipment supplied from different vendors, or what is called equipment interoperability, reduces the network cost, increases the quality and accelerates the delivery of network services. For that we study in this dissertation the requirements to apply the interoperability over the optical transport network. We focus on one particular case, called the alien wavelength use case, in which a WDM lightpath can be setup using a pair of third party transponders over any WDM optical line. The alien wavelength use case becomes manually doable, yet automating the alien lightpath setup process remains challenging due to the following reasons: I) The lack of a common communication between the third party transponders and the optical line prevents configuring the equipment properly. II) Most of the transponders’ optical parameters are propitiatory and/ or not standardized, and exchanging these parameters is required to estimate the physical performance of the path. III) Moreover, vendors’ estimation tools calculate the performance of the lightpath differently. The 1st part of this dissertation presents and analyzes most of the proposed approaches, including ours namely ”RSVP-TEbased approach”, that automate the alien lightpath setup process by providing a common or standardized communication and exchange the required transponders’ optical parameters. A comparison between the proposed approaches is made to find out the attributes of the ideal solution. The 2nd part of this dissertation focuses on upgrading the RSVP-TE-based approach to support flex-grid technology and configurable transponders that requires transponders’ configuration matching. For that we propose a standardized method, based on the RSVP-TE protocol, to fulfill that matching. The previous proposal has been demonstrated over the testbed of Orange labs and submitted as an IETF RSVP-TE standard draft as well. We also propose another standardized method, based on the OSPF-TE protocol, to exchange the raw optical parameters of the optical line equipment. Since exchanging raw optical parameters permits the proper use of vendor-agnostic physical performance estimation tools. The previous proposal has been demonstrated over the testbed and submitted as an IETF OSPF-TE standard draft. The 3rd part of this dissertation presents and demonstrates the module we developed to compute the path over a flexible network.
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Mhd Luay Alahdab. Study of solutions for automatic reconfiguration of future transport networks based on flexible optical layer. Networking and Internet Architecture [cs.NI]. Institut Polytechnique de Paris, 2019. English. ⟨NNT : 2019IPPAT009⟩. ⟨tel-02724839⟩

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