(19)

(11)

EP 1 820 314 A1

(12)

(43) Date of publication: 22.08.2007 Bulletin 2007/34 (21) Application number: 05820706.9 (22) Date of filing: 07.12.2005

(51) International Patent Classification (IPC):  H04L 27/26(2006.01) (86) International application number: PCT/KR2005/004186 (87) International publication number: WO 2006/062355 (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: 08.12.2004 KR 20040103243 20.06.2005 KR 20050052960 (71) Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE Daejeon 305-350 (KR)	(72) Inventors: LEE, Hee Soo Daejeon 305-325 (KR) AHN, Jae Young Daejeon 305-761 (KR) (74) Representative: Betten & Resch  Patentanwälte, Theatinerstrasse 8 80333 München 80333 München (DE)