Koninklijke Philips Corporation N.v.

Jelena Matovina

Ashish Vijay Pandharipande

Willem Franke Pasveer

Jurgen Mario Vangeel

Oscar Jan Deurloo

Roger Peter Anna Delnoij

Biju Kumar Sreedharan Nair

Wijnand Johannes Rietman

David Ricardo Caicedo Fernández

Michel Albertus Theodorus Klein Swormink

Johan Wilhelmus Hermanus Kuppen

Geert Bart Neuttiens

This invention discloses an alternative communication and control path that can by-pass a primary communication and control line in the control luminaires of an illumination network luminaires. By creating the alternative back-up path, it is possible to still communicate and control network elements in cases when the primary communication and control path is unavailable or when direct control of individual or a plurality of luminaries is desired. In one aspect of the invention, this alternative path may provide for a direct interface for demand response utility programs for specialized control of the luminaires of the illumination network.

System and method for providing alternative communication path for management of lighting network elements

A network of active sensors in a control system is considered. The active sensors, which may be fixed-infrastructure sensors, provide presence detection information to a distributed lighting system. The active sensors communicate by transmitting probe signals. The communication of probe signals may result in cross-interference which may vary in time. Cross-interference is detected, and can later be avoided, by determining a difference between signals received in a first part of a timeslot and signals received in a second part of the timeslot. In order to do so probe signals comprising two non-zero pulses are transmitted in respective parts of the timeslot. Applications are, for example, active presence sensors in lighting control applications in indoor as well as outdoor environments.

Control of lighting devices

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Eindhoven, Netherlands

Jelena Matovina