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(11)

EP 3 925 254 A1

(12)

(43) Date of publication: 22.12.2021 Bulletin 2021/51 (21) Application number: 20724335.3 (22) Date of filing: 16.04.2020

(51) International Patent Classification (IPC):  H04W 12/00(2021.01) H04L 29/06(2006.01) (52) Cooperative Patent Classification (CPC): H04L 63/107; H04W 12/63; H04L 63/0853 (86) International application number: PCT/US2020/028549 (87) International publication number: WO 2020/214833 (22.10.2020 Gazette 2020/43)

(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 (30) Priority: 18.04.2019 US 201916388831 (71) Applicant: Apple Inc. Cupertino, CA 95014 (US)

(72) Inventors: LEDWITH, Alexander, R. Cupertino, CA 95014 (US) BENSON, Wade Cupertino, CA 95014 (US) KROCHMAL, Marc, J. Cupertino, CA 95014 (US) IAROCCI, John, J. Cupertino, CA 95014 (US) HAUCK, Jerrold, V. Cupertino, CA 95014 (US) BROUWER, Michael Cupertino, CA 95014 (US) ADLER, Mitchell, D. Cupertino, CA 95014 (US) SIERRA, Yannick, L. Cupertino, CA 95014 (US) SYKORA, Libor Cupertino, CA 95014 (US) MARGARITOV, Jiri Cupertino, CA 95014 (US) (74) Representative: Simmons & Simmons  City Point One Ropemaker Street London EC2Y 9SS London EC2Y 9SS (GB)