(19)

(11)

EP 2 308 193 A2

(12)

(88) Date of publication A3: 18.03.2010 (43) Date of publication: 13.04.2011 Bulletin 2011/15 (21) Application number: 09789917.3 (22) Date of filing: 24.06.2009

(51) International Patent Classification (IPC):  H04L 9/28(2006.01) H03M 7/00(2006.01) (86) International application number: PCT/US2009/048361 (87) International publication number: WO 2010/011457 (28.01.2010 Gazette 2010/04)

(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: 25.07.2008 US 83743 P 05.05.2009 US 435635 (71) Applicant: Alstom Technology Ltd 5400 Baden (CH)	(72) Inventors: TANCA, Michael C. Tariffville Connecticut 06081 (US) BOBER, Thomas R. Amston Connecticut 06231 (US) (74) Representative: Hellwig, Tillmann Johannes  Dreiss Patentanwälte Gerokstrasse 1 70188 Stuttgart 70188 Stuttgart (DE)