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(11)

EP 4 825 025 A1

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(43) Date of publication: 21.10.2026 Bulletin 2026/43 (21) Application number: 25702058.6 (22) Date of filing: 06.01.2025

(51) International Patent Classification (IPC):  H04L 41/5025(2022.01) H04L 41/0663(2022.01) H04L 41/40(2022.01) H04Q 11/00(2006.01) H04L 41/5009(2022.01) (52) Cooperative Patent Classification (CPC): H04L 41/5009; H04L 41/5025; H04L 41/0663; H04Q 2011/0081; H04Q 11/0062; H04L 41/40 (86) International application number: PCT/US2025/010434 (87) International publication number: WO 2025/165513 (07.08.2025 Gazette 2025/32)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: GE KH MA MD TN (30) Priority: 29.01.2024 US 202418425781 (71) Applicant: Ciena Corporation Fulton, MD 20759 (US)	(72) Inventors: WILGOSH, Michael Ottawa, ON K2K 0J 2 (CA) CAMPBELL, Christiane, Louise Ottawa, ON K2K 0J 2 (CA) NGUYEN, Hien Hanover, MD 21076 (US) MOXON, Blair Ottawa, ON K2K 0J 2 (CA) (74) Representative: Dehns  10 Old Bailey London EC4M 7NG London EC4M 7NG (GB)