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(11)

EP 3 957 079 A1

(12)

(43) Date of publication: 23.02.2022 Bulletin 2022/08 (21) Application number: 19732284.5 (22) Date of filing: 12.06.2019

(51) International Patent Classification (IPC):  H04R 1/10(2006.01) H04R 25/00(2006.01) (52) Cooperative Patent Classification (CPC): H04R 1/1041; H04R 1/1016; H04R 1/1058; H04R 25/65; H04R 25/656 (86) International application number: PCT/EP2019/065303 (87) International publication number: WO 2020/249200 (17.12.2020 Gazette 2020/51)

(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: PAKARINEN, Jyri 16440 Kista (SE) (74) Representative: Gill Jennings & Every LLP  The Broadgate Tower 20 Primrose Street London EC2A 2ES London EC2A 2ES (GB)