(19)

(11)

EP 1 232 625 A1

(12)

(43) Date of publication: 21.08.2002 Bulletin 2002/34 (21) Application number: 00972952.6 (22) Date of filing: 01.11.2000

(51) International Patent Classification (IPC)7: H04L 29/06, G06F 17/30 (86) International application number: PCT/FI0000/953 (87) International publication number: WO 0103/5595 (17.05.2001 Gazette 2001/20)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 09.11.1999 US 436447 (71) Applicant: Nokia Corporation 02150 Espoo (FI)	(72) Inventors: PALLER, Gabor H-1047 Budapest (HU) ZALKA, Erno H-1039 Budapest (HU) (74) Representative: Johansson, Folke Anders  Nokia CorporationP.O. Box 226 00045 Nokia Group 00045 Nokia Group (FI)