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EP 4 552 276 A1

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(43) Date of publication: 14.05.2025 Bulletin 2025/20 (21) Application number: 23764759.9 (22) Date of filing: 09.08.2023

(51) International Patent Classification (IPC):  H04L 5/00(2006.01) (52) Cooperative Patent Classification (CPC): H04L 5/0051; H04B 7/0456 (86) International application number: PCT/US2023/029829 (87) International publication number: WO 2024/035772 (15.02.2024 Gazette 2024/07)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: KH MA MD TN (30) Priority: 11.08.2022 US 202263397232 P 02.08.2023 US 202318364288 (71) Applicant: Apple Inc. Cupertino, CA 95014 (US)

(72) Inventors: SUN, Haitong Cupertino, California 95014 (US) ZHANG, Dawei Cupertino, California 95014 (US) ZENG, Wei Cupertino, California 95014 (US) YE, Chunxuan Cupertino, California 95014 (US) YE, Sigen Cupertino, California 95014 (US) NIU, Huaning Cupertino, California 95014 (US) OTERI, Oghenekome Cupertino, California 95014 (US) (74) Representative: Simmons & Simmons  City Point One Ropemaker Street London EC2Y 9SS London EC2Y 9SS (GB)