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(11)

EP 3 925 297 A1

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(43) Date of publication: 22.12.2021 Bulletin 2021/51 (21) Application number: 19915492.3 (22) Date of filing: 28.03.2019

(51) International Patent Classification (IPC):  H04W 36/08(2009.01) (52) Cooperative Patent Classification (CPC): H04L 5/001; H04L 5/0094; H04L 5/0098; H04W 4/00; H04W 36/0061; H04W 36/08; H04W 4/80; H04W 36/0069 (86) International application number: PCT/CN2019/080258 (87) International publication number: WO 2020/164177 (20.08.2020 Gazette 2020/34)

(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: 14.02.2019 WO PCT/CN2019/075114 (71) Applicant: Nokia Technologies Oy 02610 Espoo (FI)	(72) Inventors: WU, Chunli Beijing 100102 (CN) HE, Jing Beijing 100102 (CN) TURTINEN, Samuli 91100 Li (FI) KOSKELA, Jarkko 90510 Oulu (FI) HENTTONEN, Tero 02320 Espoo (FI) (74) Representative: Nokia EPO representatives  Nokia Technologies Oy Karakaari 7 02610 Espoo 02610 Espoo (FI)