Callegati F.Cugini F.Ghobril P.Gunreben, S.López V.Martini, B.Pavón-Mariño P.Perényi, M.Sengezer, N.Staessens, D.Szigeti J.Tornatore, M.2016-02-082016-02-0820090733-8724http://hdl.handle.net/11693/22593This paper reports a summary of the joint research activities on Optical Core Networks within the e-Photon-ONe+ project. It provides a reasonable overview of the topics considered of interest by the European research community and supports the idea of building joint research activities that can leverage on the expertise of different research groups. © 2009 IEEE.EnglishCongestion resolutionGMPLSOptical networksOptical packet switchingPhysical impairmentProtectionRestorationService oriented networksTraffic engineeringWavelength routingCongestion resolutionGMPLSOptical networksOptical packet switchingPhysical impairmentProtectionService oriented networksTraffic engineeringWavelength routingHighway engineeringOptical materialsOptical switchesPacket switchingPhotonsRestorationTelecommunication trafficResearchArticle10.1109/JLT.2009.2024090