(19)

(11)

EP 4 085 280 A1

(12)

(43) Date of publication: 09.11.2022 Bulletin 2022/45 (21) Application number: 20707397.4 (22) Date of filing: 25.02.2020

(51) International Patent Classification (IPC):  G02B 5/18(2006.01) G02B 27/42(2006.01) G02B 13/00(2006.01) (52) Cooperative Patent Classification (CPC): G02B 13/0055; G02B 5/1895; G02B 5/1866; G02B 27/4211 (86) International application number: PCT/EP2020/054928 (87) International publication number: WO 2021/170221 (02.09.2021 Gazette 2021/35)

(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) Inventors: VERHOEVEN, Antonie 16440 Kista (SE) BOSE, Gaurav 16440 Kista (SE) JUHOLA, Mikko 16440 Kista (SE) (74) Representative: Körber, Martin Hans  Mitscherlich PartmbB Patent- und Rechtsanwälte Sonnenstraße 33 80331 München 80331 München (DE)