(19)

(11)

EP 2 754 256 A1

(12)

(43) Date of publication: 16.07.2014 Bulletin 2014/29 (21) Application number: 12700927.2 (22) Date of filing: 11.01.2012

(51) International Patent Classification (IPC):  H04L 1/00(2006.01) (86) International application number: PCT/EP2012/000108 (87) International publication number: WO 2013/034202 (14.03.2013 Gazette 2013/11)

(84) Designated Contracting States: AL 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 RS SE SI SK SM TR (30) Priority: 06.09.2011 US 201161531296 P (71) Applicant: Telefonaktiebolaget L M Ericsson (publ) 164 83 Stockholm (SE)	(72) Inventors: OHLMER, Eckhard 01309 Dresden (DE) WACHSMANN, Udo 91126 Schwabach (DE) (74) Representative: Neuerburg, Gerhard et al Ericsson GmbH Patent Department Ericsson Allee 1 52134 Herzogenrath 52134 Herzogenrath (DE)