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(11)

EP 2 878 137 A1

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(43) Date of publication: 03.06.2015 Bulletin 2015/23 (21) Application number: 12788148.0 (22) Date of filing: 26.10.2012

(51) International Patent Classification (IPC):  H04R 3/04(2006.01) H03G 5/02(2006.01) H04M 1/60(2006.01) H04M 9/08(2006.01) (86) International application number: PCT/EP2012/071306 (87) International publication number: WO 2014/063755 (01.05.2014 Gazette 2014/18)

(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 Designated Extension States: BA ME (71) Applicant: Huawei Technologies Co., Ltd. Longgang District Shenzhen, Guangdong 518129 (CN)	(72) Inventors: FALLER, Christof 80992 Munich (DE) FAVROT, Alexis 80992 Munich (DE) VIRETTE, David 80992 Munich (DE) LANG, Yue 80992 Munich (DE) (74) Representative: Kreuz, Georg Maria et al Huawei Technologies Duesseldorf GmbH Messerschmittstrasse 4 80992 München 80992 München (DE)