(19)

(11)

EP 4 681 342 A2

(12)

(88) Date of publication A3: 26.12.2024 (43) Date of publication: 21.01.2026 Bulletin 2026/04 (21) Application number: 24735761.9 (22) Date of filing: 10.05.2024

(51) International Patent Classification (IPC):  H04B 7/0456(2017.01) H04B 7/06(2006.01) (52) Cooperative Patent Classification (CPC): H04B 7/0478; H04B 7/0626; H04B 7/0456 (86) International application number: PCT/US2024/028881 (87) International publication number: WO 2024/233937 (14.11.2024 Gazette 2024/46)

(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: GE KH MA MD TN (30) Priority: 11.05.2023 US 202363501438 P (71) Applicant: Apple Inc. Cupertino, CA 95014 (US)

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