(19)

(11)

EP 1 307 998 A2

(12)

(88) Date of publication A3: 11.04.2002 (43) Date of publication: 07.05.2003 Bulletin 2003/19 (21) Application number: 01958011.7 (22) Date of filing: 20.07.2001

(51) International Patent Classification (IPC)7: H04L 12/12, H04L 12/64, H04L 12/46 (86) International application number: PCT/EP0108/552 (87) International publication number: WO 0200/9350 (31.01.2002 Gazette 2002/05)

(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: 26.07.2000 US 616632 (71) Applicant: Koninklijke Philips Electronics N.V. 5621 BA Eindhoven (NL)	(72) Inventors: MOONEN, Jan, R. NL-5656 AA Eindhoven (NL) SHTEYN, Yevgeniy, E. NL-5656 AA Eindhoven (NL) (74) Representative: Groenendaal, Antonius Wilhelmus Maria  INTERNATIONAAL OCTROOIBUREAU B.V.,Prof. Holstlaan 6 5656 AA Eindhoven 5656 AA Eindhoven (NL)