(19)

(11)

EP 2 353 270 A2

(12)

(88) Date of publication A3: 04.11.2010 (43) Date of publication: 10.08.2011 Bulletin 2011/32 (21) Application number: 09736448.3 (22) Date of filing: 29.09.2009

(51) International Patent Classification (IPC):  H04L 29/06(2006.01) (86) International application number: PCT/GB2009/002317 (87) International publication number: WO 2010/038011 (08.04.2010 Gazette 2010/14)

(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 SM TR (30) Priority: 30.09.2008 GB 0817947 (71) Applicant: Cambridge Broadband Networks Limited Cambridge CB4 0WZ (GB)	(72) Inventor: BARDEN, Richard Cambridge CB4 1DZ (GB) (74) Representative: Oliver, Suzanne et al HLBBshaw Merlin House Falconry Court Baker's Lane Epping, Essex CM16 5DQ Epping, Essex CM16 5DQ (GB)