Orchestrating Lightpath Recovery and Flexible Functional Split to Preserve Virtualized RAN Connectivity

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dc.contributor.author Kondepu, K.
dc.contributor.author Sgambelluri, A.
dc.contributor.author Sambo, N.
dc.contributor.author Giannone, F.
dc.contributor.author Castoldi, P.
dc.contributor.author Valcarenghi, L.
dc.date.accessioned 2019-09-06T11:02:49Z
dc.date.available 2019-09-06T11:02:49Z
dc.date.issued 2018-11
dc.identifier.bibliographicCitation Kondepu, K., Sgambelluri, A., Sambo, N., Giannone, F., Castoldi, P. y Valcarenghi, L. (2018). Orchestrating Lightpath Recovery and Flexible Functional Split to Preserve Virtualized RAN Connectivity. Journal of Optical Communications and Networking, 10 (11), pp. 843-851.
dc.identifier.issn 1943-0620
dc.identifier.uri http://hdl.handle.net/10016/28767
dc.description.abstract In the next-generation radio access network (NG RAN), the next-generation evolved NodeBs (gNBs) will be, likely, split into virtualized central units (CUs) and distributed units (DUs) interconnected by a fronthaul network. Because of fronthaul latency and capacity requirements, optical metro-ring networks are among the main candidates for supporting converged 5G and non-5G services. In this scenario, a degradation in the quality of transmission of the lightpaths connecting DU and CU can be revealed (or anticipated) based on monitoring techniques. Thus, the lightpath transmission parameters can be adapted to maintain the required bit error rate (BER). However, in specific cases, the original requested capacity between DU and CU could be not guaranteed, thus impacting the service. In this case, another DU–CU connectivity should be considered, relying on a change of the so-called functional split. This study proposes a two-step recovery scheme orchestrating lightpath transmission adaptation and functional split reconfiguration to guarantee the requested connectivity in a virtualized RAN fronthaul. Results show that, for the connections that cannot be transported by the original lightpath, a graceful degradation followed by a recovery is possible within tens of seconds.
dc.description.sponsorship This work was partly funded by the project H2020-ICT-2016-2 “5G-TRANSFORMER” (761536)
dc.format.extent 9
dc.language.iso eng
dc.publisher IEEE
dc.rights © 2018 IEEE.
dc.subject.other Flexible functional split
dc.subject.other Recovery
dc.subject.other Lightpath transmission adaptation
dc.title Orchestrating Lightpath Recovery and Flexible Functional Split to Preserve Virtualized RAN Connectivity
dc.type article
dc.subject.eciencia Telecomunicaciones
dc.identifier.doi https://doi.org/10.1364/JOCN.10.000843
dc.rights.accessRights openAccess
dc.relation.projectID info:eu-repo/grantAgreement/EC/H2020/761536
dc.type.version acceptedVersion
dc.identifier.publicationfirstpage 843
dc.identifier.publicationissue 11
dc.identifier.publicationlastpage 851
dc.identifier.publicationtitle Journal of Optical Communications and Networking
dc.identifier.publicationvolume 10
dc.contributor.funder European Commission
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