(19)

(11)

EP 1 974 492 A2

(12)

(88) Date of publication A3: 25.10.2007 (43) Date of publication: 01.10.2008 Bulletin 2008/40 (21) Application number: 06846062.5 (22) Date of filing: 27.12.2006

(51) International Patent Classification (IPC):  H04L 1/18(2006.01) (86) International application number: PCT/US2006/049306 (87) International publication number: WO 2007/079085 (12.07.2007 Gazette 2007/28)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR (30) Priority: 29.12.2005 US 754713 P 21.12.2006 US 871368 P (71) Applicant: INTERDIGITAL TECHNOLOGY CORPORATION Wilmington, DE 19810 (US)	(72) Inventors: TERRY, Stephen E. Northport, New York 11768 (US) CHANDRA, Arty Manhasset Hills, New York 11040 (US) (74) Representative: Ahrengart, Kenneth  Awapatent AB P.O. Box 45086 104 30 Stockholm 104 30 Stockholm (SE)