(19)

(11)

EP 1 415 424 A1

(12)

(43) Date of publication: 06.05.2004 Bulletin 2004/19 (21) Application number: 02738505.3 (22) Date of filing: 26.06.2002

(51) International Patent Classification (IPC)7: H04L 1/00, H04L 12/56, G08C 17/02, G06F 11/00 (86) International application number: PCT/IB2002/002432 (87) International publication number: WO 2003/005629 (16.01.2003 Gazette 2003/03)

(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: 30.06.2001 US 895785 (71) Applicant: Nokia Inc. Irving, TX 75039 (US)	(72) Inventors: KRISHNAMURTHI, Govindarajan Arlington, MA 02474 (US) GUO, Yile Woburn, MA 01801 (US) (74) Representative: Piotrowicz, Pawel Jan Andrzej et al Venner, Shipley & Co.,20 Little Britain London EC1A 7DH London EC1A 7DH (GB)