(19)

(11)

EP 2 848 086 A1

(12)

(43) Date of publication: 18.03.2015 Bulletin 2015/12 (21) Application number: 12722118.2 (22) Date of filing: 14.05.2012

(51) International Patent Classification (IPC):  H04W 88/04(2009.01) (86) International application number: PCT/EP2012/058953 (87) International publication number: WO 2013/167206 (14.11.2013 Gazette 2013/46)

(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 (30) Priority: 11.05.2012 WO PCT/EP2012/058838 (71) Applicant: Nokia Solutions and Networks Oy 02610 Espoo (FI)	(72) Inventors: YU, Ling FI-90650 Oulu (FI) VAN PHAN, Vinh FI-90100 Oulu (FI) HORNEMAN, Kari, Veikko FI-90800 Oulu (FI)