(19)

(11)

EP 3 688 909 A1

(12)

(43) Date of publication: 05.08.2020 Bulletin 2020/32 (21) Application number: 18782095.6 (22) Date of filing: 24.09.2018

(51) International Patent Classification (IPC):  H04L 1/18(2006.01) (86) International application number: PCT/FI2018/050687 (87) International publication number: WO 2019/063880 (04.04.2019 Gazette 2019/14)

(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: 28.09.2017 US 201762564752 P (71) Applicant: Nokia Technologies Oy 02610 Espoo (FI)	(72) Inventor: KOSKINEN, Henri 02600 Espoo (FI) (74) Representative: Nokia EPO representatives  Nokia Technologies Oy Karakaari 7 02610 Espoo 02610 Espoo (FI)