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(11)

EP 4 552 308 A1

(12)

(43) Date of publication: 14.05.2025 Bulletin 2025/20 (21) Application number: 23731229.3 (22) Date of filing: 06.06.2023

(51) International Patent Classification (IPC):  H04L 67/141(2022.01) H04L 67/56(2022.01) H04W 4/42(2018.01) H04L 65/1069(2022.01) H04L 67/12(2022.01) H04L 65/1063(2022.01) H04W 4/48(2018.01) H03M 1/00(2006.01) (52) Cooperative Patent Classification (CPC): H04W 4/42; H04W 4/48; H04L 65/1069; H04L 67/12; H04L 67/141; H04L 67/56; H04L 65/65; H04L 65/1073; H04L 65/1104; H04L 63/083; H04W 12/069 (86) International application number: PCT/EP2023/065122 (87) International publication number: WO 2024/008375 (11.01.2024 Gazette 2024/02)

(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: KH MA MD TN (30) Priority: 06.07.2022 IN 202241038779 18.08.2022 GB 202212042 (71) Applicant: ALSTOM Holdings 93400 Saint-Ouen-sur-Seine (FR)	(72) Inventors: SALI, Hemant Maharashtra Pune 411021 (IN) DOYLE, Roger Cannock Staffordshire WS11 9RN (GB) (74) Representative: Zimmermann & Partner Patentanwälte mbB  Postfach 330 920 80069 München 80069 München (DE)