EP 1251721 A1 20021023 - Urban remote surveillance system for street lamps
Title (en)
Urban remote surveillance system for street lamps
Title (de)
Überwachungssystem von Strassenlampen
Title (fr)
Système de surveillance de réverbères
Publication
Application
Priority
EP 01830235 A 20010404
Abstract (en)
Urban remote-surveillance system for street lamps, in which a concentrator module (1) sends, using a very low power transceiver, by means of a polling procedure, a message to each of a plurality of remote-control modules (7,8,9,10) equipped with a very low power transceiver and organized in a hierarchical tree structure, defining in the message the destination module and a receiving/transmitting path consisting of a plurality of intermediate modules able to communicate with each other in succession, at the same frequency and without mutual interference, so as to obtain the necessary geographical coverage also using very low power transceivers. <IMAGE>
IPC 1-7
IPC 8 full level
H05B 37/02 (2006.01); H05B 37/03 (2006.01)
CPC (source: EP US)
H05B 47/175 (2020.01 - EP US); H05B 47/19 (2020.01 - EP US); H05B 47/22 (2020.01 - EP US)
Citation (search report)
- [XA] US 5371859 A 19941206 - LENNARTSSON KENT [SE]
- [A] US 4425628 A 19840110 - BEDARD JAMES F [US], et al
- [A] US 5936362 A 19990810 - ALT LARRY G [US], et al
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
DOCDB simple family (application)
EP 01830235 A 20010404