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(11)

EP 1 992 185 A2

(12)

(43) Date of publication: 19.11.2008 Bulletin 2008/47 (21) Application number: 07715525.7 (22) Date of filing: 07.03.2007

(51) International Patent Classification (IPC):  H04Q 7/38(2006.01) H04L 29/06(2006.01) H04L 12/28(2006.01) (86) International application number: PCT/KR2007/001125 (87) International publication number: WO 2007/102702 (13.09.2007 Gazette 2007/37)

(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 MT NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK RS (30) Priority: 07.03.2006 KR 20060021334 16.11.2006 KR 20060113448 (71) Applicant: Electronics and Telecommunications Research Institute Daejeon-city 305-350 (KR)	(72) Inventors: KWON, Hye-Yeon Daejeon-city 305-350 (KR) PARK, Ae-Soon Daejeon-city 305-755 (KR) RO, Kwang-Hyun Goyang-si, Gyeonggi-do 411-352 (KR) (74) Representative: Betten & Resch  Patentanwälte Theatinerstrasse 8 (Fünf Höfe) 80333 München 80333 München (DE)