(19)

(11)

EP 4 278 578 A1

(12)

(43) Date of publication: 22.11.2023 Bulletin 2023/47 (21) Application number: 22701663.1 (22) Date of filing: 05.01.2022

(51) International Patent Classification (IPC):  H04L 41/0631(2022.01) H04L 43/067(2022.01) H04L 41/16(2022.01) (52) Cooperative Patent Classification (CPC): H04L 43/067; H04L 41/16; H04L 41/064 (86) International application number: PCT/FI2022/050009 (87) International publication number: WO 2022/152967 (21.07.2022 Gazette 2022/29)

(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 MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 13.01.2021 FI 20215028 (71) Applicant: Elisa Oyj 00520 Helsinki (FI)	(72) Inventors: CHIS, Adriana 00520 Helsinki (FI) LUNDÉN, Petteri 00520 Helsinki (FI) (74) Representative: Espatent Oy  Kaivokatu 10 D 00100 Helsinki 00100 Helsinki (FI)