(19)

(11)

EP 1 021 892 A1

(12)

(43) Date of publication: 26.07.2000 Bulletin 2000/30 (21) Application number: 98900866.9 (22) Date of filing: 16.01.1998

(51) International Patent Classification (IPC)7: H04L 12/56 (86) International application number: PCT/FI9800/034 (87) International publication number: WO 9832/265 (23.07.1998 Gazette 1998/29)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 20.01.1997 FI 970237 (71) Applicant: Nokia Networks Oy 02150 Espoo (FI)	(72) Inventors: KARI, Hannu FIN-02880 Veikkola (FI) HANNULA, Antti FIN-02110 Espoo (FI) (74) Representative: Virkkala, Jukka Antero et al Kolster Oy Ab,Iso Roobertinkatu 23,P.O. Box 148 00121 Helsinki 00121 Helsinki (FI)