(19)

(11)

EP 2 286 609 A2

(12)

(88) Date of publication A3: 23.12.2009 (43) Date of publication: 23.02.2011 Bulletin 2011/08 (21) Application number: 09742142.4 (22) Date of filing: 07.05.2009

(51) International Patent Classification (IPC):  H04W 8/30(2009.01) (86) International application number: PCT/EP2009/055572 (87) International publication number: WO 2009/135924 (12.11.2009 Gazette 2009/46)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA RS (30) Priority: 07.05.2008 GB 0808256 (71) Applicant: FRANCE TELECOM 75505 Paris Cedex 15 (FR)	(72) Inventor: MENDIZABAL, Inigo Bristol BS32 4QJ (GB) (74) Representative: Spaargaren, Jerome et al EIP Fairfax House 15 Fulwood Place London, Greater London WC1V 6HU London, Greater London WC1V 6HU (GB)