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(11)

EP 2 076 991 A1

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(43) Date of publication: 08.07.2009 Bulletin 2009/28 (21) Application number: 07821383.2 (22) Date of filing: 16.10.2007

(51) International Patent Classification (IPC):  H04L 1/18(2006.01) H04L 1/00(2006.01) (86) International application number: PCT/EP2007/061017 (87) International publication number: WO 2008/046822 (24.04.2008 Gazette 2008/17)

(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: 16.10.2006 EP 06021658 (71) Applicant: Nokia Siemens Networks GmbH & Co. KG 81541 München (DE)	(72) Inventors: COSTA, Elena 81739 München (DE) LOTT, Matthias 82152 Planegg (DE) LUO, Jijun 81549 München (DE) SCHULZ, Egon 80993 München (DE) (74) Representative: Bruglachner, Thomas E.  Nokia Siemens Networks GmbH & Co. KG Patentabteilung Postfach 80 17 60 81617 München 81617 München (DE)