(19)

(11)

EP 1 751 943 A1

(12)

(43) Date of publication: 14.02.2007 Bulletin 2007/07 (21) Application number: 05740669.6 (22) Date of filing: 24.05.2005

(51) International Patent Classification (IPC):  H04L 27/36(2006.01) (86) International application number: PCT/IB2005/051690 (87) International publication number: WO 2006/033026 (30.03.2006 Gazette 2006/13)

(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 MC NL PL PT RO SE SI SK TR (30) Priority: 01.06.2004 IB 41218804 09.09.2004 US 936511 (71) Applicant: Nokia Corporation 02150 Espoo (FI)	(72) Inventor: WEISS, Manfred 88430 Rot -Haslach (DE) (74) Representative: Derry, Paul Stefan et al Venner Shipley LLP 20 Little Britain London EC1A 7DH London EC1A 7DH (GB)