(19)

(11)

EP 1 183 830 A1

(12)

(43) Date of publication: 06.03.2002 Bulletin 2002/10 (21) Application number: 00914268.8 (22) Date of filing: 28.03.2000

(51) International Patent Classification (IPC)7: H04L 12/56, H04L 29/06, H04Q 7/22 (86) International application number: PCT/GB0001/184 (87) International publication number: WO 0076/143 (14.12.2000 Gazette 2000/50)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 09.06.1999 EP 99305107 (71) Applicant: LUCENT TECHNOLOGIES INC. Murray Hill, New Jersey 07974-0636 (US)	(72) Inventors: DEMETRESCU, Cristian London SW19 2EU (GB) SAMARAS, Konstantinos Swindon SN2 2HL (GB) WU, Jian Jun Swindon SN5 6AW (GB) (74) Representative: Sarup, David Alexander et al Lucent Technologies NS UK Limted, 5 Mornington Road Woodford Green, Essex IG8 OTU Woodford Green, Essex IG8 OTU (GB)