(19)

(11)

EP 1 497 964 A1

(12)

(43) Date of publication: 19.01.2005 Bulletin 2005/03 (21) Application number: 03712171.2 (22) Date of filing: 27.03.2003

(51) International Patent Classification (IPC)7: H04L 29/06, G06F 17/60, G06F 9/50 (86) International application number: PCT/FI2003/000235 (87) International publication number: WO 2003/090424 (30.10.2003 Gazette 2003/44)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR Designated Extension States: AL LT LV MK (30) Priority: 19.04.2002 FI 20020765 (71) Applicant: Nokia Corporation 02150 Espoo (FI)	(72) Inventors: DEBBARMAN, Kaustabh FIN-33720 Tampere (FI) SILFVERBERG, Kari FIN-38460 Mouhijärvi (FI) HAVULINNA, Juha FIN-33730 Tampere (FI) (74) Representative: Simmelvuo, Markku Kalevi et al Papula OyP.O. Box 981 00101 Helsinki 00101 Helsinki (FI)