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(11)

EP 3 991 395 A1

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(43) Date of publication: 04.05.2022 Bulletin 2022/18 (21) Application number: 19736837.6 (22) Date of filing: 26.06.2019

(51) International Patent Classification (IPC):  H04M 3/42(2006.01) H04L 29/06(2006.01) H04M 1/57(2006.01) G06F 3/16(2006.01) H04M 3/527(2006.01) (52) Cooperative Patent Classification (CPC): H04M 3/527; H04M 3/42102; H04M 3/42238; H04L 63/0407; G06F 3/167; H04M 1/578; H04M 3/42042; H04M 1/571 (86) International application number: PCT/SE2019/050621 (87) International publication number: WO 2020/263137 (30.12.2020 Gazette 2020/53)

(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: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) 164 83 Stockholm (SE)	(72) Inventor: GONZALEZ DE LANGARICA, Ester 113 41 Stockholm (SE) (74) Representative: Ericsson  Patent Development Torshamnsgatan 21-23 164 80 Stockholm 164 80 Stockholm (SE)