(19)

(11)

EP 1 224 552 A1

(12)

(43) Date of publication: 24.07.2002 Bulletin 2002/30 (21) Application number: 99974138.2 (22) Date of filing: 25.10.1999

(51) International Patent Classification (IPC)7: G06F 11/36 (86) International application number: PCT/EP9908/053 (87) International publication number: WO 0131/451 (03.05.2001 Gazette 2001/18)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (71) Applicant: Nokia Corporation 02150 Espoo (FI)	(72) Inventors: SIISKONEN, Marko FIN-37100 Nokia (FI) NIEMINEN, Jari-Pekka FIN-33720 Tampere (FI) (74) Representative: Leson, Thomas Johannes Alois, Dipl.-Ing.  Tiedtke-Bühling-Kinne & Partner GbR,TBK-Patent,Bavariaring 4 80336 München 80336 München (DE)