(19)

(11)

EP 2 297 906 A2

(12)

(88) Date of publication A3: 07.10.2010 (43) Date of publication: 23.03.2011 Bulletin 2011/12 (21) Application number: 09769440.0 (22) Date of filing: 26.06.2009

(51) International Patent Classification (IPC):  H04L 12/58(2006.01) H04L 29/06(2006.01) H04L 29/12(2006.01) (86) International application number: PCT/FI2009/050580 (87) International publication number: WO 2009/156597 (30.12.2009 Gazette 2009/53)

(84) Designated Contracting States: 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 SE SI SK TR Designated Extension States: AL BA RS (30) Priority: 27.06.2008 FI 20085663 (71) Applicant: Deltagon Group OY 00210 Helsinki (FI)	(72) Inventor: KOISTINEN, Pasi FI-00210 Helsinki (FI) (74) Representative: Savela, Antti-Jussi Tapani  Patent Agency Compatent Ltd. Hitsaajankatu 6 00810 Helsinki 00810 Helsinki (FI)