(19)

(11)

EP 4 268 415 A1

(12)

(43) Date of publication: 01.11.2023 Bulletin 2023/44 (21) Application number: 21773567.9 (22) Date of filing: 08.09.2021

(51) International Patent Classification (IPC):  H04L 9/08(2006.01) (52) Cooperative Patent Classification (CPC): H04L 9/0844; H04L 9/0847 (86) International application number: PCT/EP2021/074662 (87) International publication number: WO 2023/036409 (16.03.2023 Gazette 2023/11)

(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: Huawei Technologies Co., Ltd. Shenzhen, Guangdong 518129 (CN)	(72) Inventor: LI, Yong 80992 Munich (DE) (74) Representative: Körber, Martin Hans  Mitscherlich PartmbB Patent- und Rechtsanwälte Karlstraße 7 80333 München 80333 München (DE)