(19)

(11)

EP 1 175 764 A2

(12)

(88) Date of publication A3: 01.02.2001 (43) Date of publication: 30.01.2002 Bulletin 2002/05 (21) Application number: 00926151.2 (22) Date of filing: 19.04.2000

(51) International Patent Classification (IPC)7: H04L 29/06 (86) International application number: PCT/US0010/563 (87) International publication number: WO 0067/444 (09.11.2000 Gazette 2000/45)

(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 (30) Priority: 30.04.1999 US 131807 P (71) Applicant: General Instrument Corporation Horsham, Pennsylvania 19044 (US)	(72) Inventor: BOOTH, Robert, Charles Jamison, PA 18929 (US) (74) Representative: Regelmann, Thomas, Dr.  Hoeger, Stellrecht & Partner, Uhlandstrasse 14 c 70182 Stuttgart 70182 Stuttgart (DE)