(19)

(11)

EP 1 867 136 A2

(12)

(88) Date of publication A3: 08.02.2007 (43) Date of publication: 19.12.2007 Bulletin 2007/51 (21) Application number: 06794538.6 (22) Date of filing: 13.03.2006

(51) International Patent Classification (IPC):  H04L 29/06(2006.01) (86) International application number: PCT/GB2006/000863 (87) International publication number: WO 2006/134313 (21.12.2006 Gazette 2006/51)

(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: 14.03.2005 GB 0505210 (71) Applicant: Orange S.A. 75505 Paris Cédex 15 (FR)	(72) Inventor: ALLAN, Robert, Mark Westbury on Trym Brisol BS10 5ET (GB) (74) Representative: DeVile, Jonathan Mark  D Young & Co 120 Holborn London EC1N 2DY London EC1N 2DY (GB)