(19)

(11)

EP 2 098 013 A1

(12)

(43) Date of publication: 09.09.2009 Bulletin 2009/37 (21) Application number: 07820141.5 (22) Date of filing: 12.09.2007

(51) International Patent Classification (IPC):  H04L 12/28(2006.01) H02J 13/00(2006.01) H02J 3/14(2006.01) (86) International application number: PCT/EP2007/059569 (87) International publication number: WO 2008/077654 (03.07.2008 Gazette 2008/27)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR (30) Priority: 27.12.2006 EP 06127206 (71) Applicant: International Business Machines Corporation Armonk, NY 10504 (US)	(72) Inventors: PICHETTI, Luigi 00144 Roma (IT) SECCHI, Marco 00144 Roma (IT) SECOMANDI, Antonio 00144 Roma (IT) DONATELLI, Alessandro 00144 Roma (IT) (74) Representative: Bell, Mark  Compagnie IBM France Département de Propriété Intellectuelle Le Plan du Bois 06610 La Gaude 06610 La Gaude (FR)