(19)

(11)

EP 3 017 435 A2

(12)

(88) Date of publication A3: 09.04.2015 (43) Date of publication: 11.05.2016 Bulletin 2016/19 (21) Application number: 14786262.7 (22) Date of filing: 05.05.2014

(51) International Patent Classification (IPC):  G08B 25/10(2006.01) G08B 13/196(2006.01) H04B 1/713(2011.01) G08B 29/18(2006.01) H04W 52/02(2009.01) (86) International application number: PCT/IB2014/001785 (87) International publication number: WO 2014/188282 (27.11.2014 Gazette 2014/48)

(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 Designated Extension States: BA ME (30) Priority: 03.05.2013 US 201361819008 P (71) Applicant: Quatro Electronics Limited Borehamwood WD6 1JH (GB)	(72) Inventor: WILLIAMSON, Stephen Blackpool FY2 0TR (GB) (74) Representative: Midgley, Jonathan Lee  Scott & York Intellectual Property Ltd 45 Grosvenor Road St. Albans Hertfordshire AL1 3AW St. Albans Hertfordshire AL1 3AW (GB)