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EP 4 817 218 A1

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(43) Date of publication: 07.10.2026 Bulletin 2026/41 (21) Application number: 23959772.7 (22) Date of filing: 29.11.2023

(51) International Patent Classification (IPC):  H04L 5/00(2006.01) (52) Cooperative Patent Classification (CPC): H04L 5/0048; H04L 5/005; H04L 5/0094; H04L 5/0053; H04L 5/0023 (86) International application number: PCT/CN2023/135046 (87) International publication number: WO 2025/111851 (05.06.2025 Gazette 2025/23)

(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 (71) Applicant: Apple Inc. Cupertino, CA 95014 (US)

(72) Inventors: HE, Hong Sunnyvale California 94085 (US) YAO, Chunhai Beijing 100022 (CN) YE, Chunxuan San Diego California 92121 (US) ZHANG, Dawei Sunnyvale California 94085 (US) SUN, Haitong Sunnyvale California 94085 (US) ZENG, Wei Sunnyvale California 94085 (US) YANG, Weidong San Diego California 92121 (US) (74) Representative: Zacco Denmark A/S  Arne Jacobsens Allé 15 2300 Copenhagen S 2300 Copenhagen S (DK)