| 摘要 |
A lighting system and a method of operating the lighting system are described. A plurality of lighting units (10, 10') each comprise, a lighting element (12) with a lighting control unit (14) for controlling its light output, and a communication unit (16, 16') for communicating over a communication medium, e.g. RF or power line communication. The units (10, 10') further have an optical receiver (18) for receiving light from other lighting units (10, 10'). A controller unit (20) is connected to the optical receiver (18), the communication unit (16, 16') and the lighting control unit (14). In order to allow easy, automated set-up, at least in a configuration phase, the lighting units (10, 10') send information by operating the lighting elements (12) in a modulated manner, and this information is received by a further lighting unit (10, 10') observing the generated light. According to a first aspect, the lighting units (10, 10') are grouped in clusters by turning on the lighting element (12) in a first lighting unit and generating cluster information depending on whether or not the emitted light is observed by further lighting units. According to a second aspect, lighting units (10, 10') form a communications network and communicate with a joining lighting unit (66) by transmitting code data (78a, 78b) by operating the lighting element (12) according to a modulation sequence, and then transmitting configuration data (80) over the communication medium encrypted with the code data (78a, 78b).
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