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(11)

EP 2 524 472 A1

(12)

(43) Date of publication: 21.11.2012 Bulletin 2012/47 (21) Application number: 11732707.2 (22) Date of filing: 13.01.2011

(51) International Patent Classification (IPC):  H04L 12/18(2006.01) H04L 1/16(2006.01) H04W 4/06(2009.01) (86) International application number: PCT/FI2011/050021 (87) International publication number: WO 2011/086236 (21.07.2011 Gazette 2011/29)

(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 (30) Priority: 15.01.2010 GB 201000691 (71) Applicant: Nokia Corporation 02150 Espoo (FI)	(72) Inventors: LI, Zhenhong 200139 (CN) ZOU, Wei 200129 (CN) WANG, Haifeng 200051 (CN) WU, Gang Shanghai (CN) (74) Representative: Jaatinen, Jussi Imari  Nokia Corporation Intellectual Property Department Keilalahdentie 4 02150 Espoo 02150 Espoo (FI)