(19)

(11)

EP 2 721 781 A2

(12)

(88) Date of publication A3: 28.02.2013 (43) Date of publication: 23.04.2014 Bulletin 2014/17 (21) Application number: 12801345.5 (22) Date of filing: 16.06.2012

(51) International Patent Classification (IPC):  H04L 12/28(2006.01) H04L 12/16(2006.01) (86) International application number: PCT/US2012/042841 (87) International publication number: WO 2012/174499 (20.12.2012 Gazette 2012/51)

(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: 17.06.2011 US 201113163140 02.10.2011 WO PCT/US2011/054518 (71) Applicant: Microsoft Corporation Redmond, Washington 98052-6399 (US)	(72) Inventors: HOPMANN, Alexander Redmond, Washington 98052-6399 (US) FOX, Eric Redmond, Washington 98052-6399 (US) FURTWANGLER, Tyler Redmond, Washington 98052-6399 (US) (74) Representative: Grünecker, Kinkeldey, Stockmair & Schwanhäusser  Leopoldstrasse 4 80802 München 80802 München (DE)