(19)

(11)

EP 1 820 296 A1

(12)

(43) Date of publication: 22.08.2007 Bulletin 2007/34 (21) Application number: 05821074.1 (22) Date of filing: 08.12.2005

(51) International Patent Classification (IPC):  H04L 9/32(2006.01) (86) International application number: PCT/KR2005/004191 (87) International publication number: WO 2006/062358 (15.06.2006 Gazette 2006/24)

(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: 10.12.2004 US 634575 P 24.12.2004 KR 20040112241 (71) Applicant: Samsung Electronics Co., Ltd. Suwon-si 442-742 Gyeonggi-Do (KR)	(72) Inventors: KIM, Chi-Hurn 211-1604 Hyundai 2-cha Apt. Gyeonggi-do 445-983 (KR) YOU, Yong-Kuk Seoul 133-751 (KR) NAM, Su-Hyun Seoul 137-817 (KR) (74) Representative: Brandon, Paul Laurence  APPLEYARD LEES 15 Clare Road Halifax HX1 2HY Halifax HX1 2HY (GB)