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(11)

EP 2 474 175 A1

(12)

(43) Date of publication: 11.07.2012 Bulletin 2012/28 (21) Application number: 10813207.7 (22) Date of filing: 02.09.2010

(51) International Patent Classification (IPC):  H04W 4/06(2009.01) H04L 27/18(2006.01) H04W 72/08(2009.01) H04L 27/32(2006.01) (86) International application number: PCT/CA2010/001375 (87) International publication number: WO 2011/026235 (10.03.2011 Gazette 2011/10)

(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 SE SI SK SM TR (30) Priority: 02.09.2009 US 239239 P (71) Applicant: Nortel Networks Limited St. Laurent, QC H4S 2A9 (CA)	(72) Inventors: VRZIC, Sophie Nepean Ontario K2G 6C2 (CA) NOVAK, Robert Ottawa Ontario K2A 1Z1 (CA) FONG, Mo-Han Ottawa Ontario K1S 3J7 (CA) (74) Representative: Mackenzie, Andrew Bryan et al Scott & York Intellectual Property Limited 45 Grosvenor Road St. Albans Hertfordshire AL1 3AW St. Albans Hertfordshire AL1 3AW (GB)