(19)

(11)

EP 4 211 866 A1

(12)

(43) Date of publication: 19.07.2023 Bulletin 2023/29 (21) Application number: 20771554.1 (22) Date of filing: 14.09.2020

(51) International Patent Classification (IPC):  H04L 9/32(2006.01) (52) Cooperative Patent Classification (CPC): H04L 9/3268; H04L 63/0823 (86) International application number: PCT/EP2020/075612 (87) International publication number: WO 2022/053155 (17.03.2022 Gazette 2022/11)

(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 (71) Applicant: Telefonaktiebolaget LM Ericsson (publ) 164 83 Stockholm (SE)	(72) Inventors: ULLAH, Kazi Wali 02770 Espoo (FI) SUIHKO, Timo 02230 Espoo (FI) PIETIKÄINEN, Ari 02320 Espoo (FI) (74) Representative: Ericsson  Patent Development Torshamnsgatan 21-23 164 80 Stockholm 164 80 Stockholm (SE)