(19)

(11)

EP 2 494 744 A2

(12)

(88) Date of publication A3: 24.11.2011 (43) Date of publication: 05.09.2012 Bulletin 2012/36 (21) Application number: 09850771.8 (22) Date of filing: 29.10.2009

(51) International Patent Classification (IPC):  H04L 12/56(2006.01) H04L 12/26(2006.01) (86) International application number: PCT/IB2009/007474 (87) International publication number: WO 2011/051750 (05.05.2011 Gazette 2011/18)

(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 SM TR (71) Applicant: Telefónica, S.A. 28013 Madrid (ES)	(72) Inventors: RAMON SALGUERO, Francisco, Javier E-28013 Madrid (ES) GARCIA DE BLAS, Gerardo E-28013 Madrid (ES) (74) Representative: Carpintero Lopez, Francisco et al Herrero & Asociados, S.L. Alcalá 35 28014 Madrid 28014 Madrid (ES)