Abstract: A lighting system serving as a wireless network system includes a plurality of lighting appliances, which are a plurality of wireless devices, that each have unique identifier and transmit/receive a radio signal. Under control performed by a lighting controller, an operation is sequentially performed with respect to each of the plurality of lighting appliances in which one lighting appliance from among the plurality of lighting appliances broadcasts a measurement signal that includes the identifier of that lighting appliance and the other lighting appliances receive the measurement signal and measure reception quality, which depends on the distance between the lighting appliances.

Abstract: A lighting system serving as a wireless network system includes a plurality of lighting appliances, which are a plurality of wireless devices, that each have unique identifier and transmit/receive a radio signal. Under control performed by a lighting controller, an operation is sequentially performed with respect to each of the plurality of lighting appliances in which one lighting appliance from among the plurality of lighting appliances broadcasts a measurement signal that includes the identifier of that lighting appliance and the other lighting appliances receive the measurement signal and measure reception quality, which depends on the distance between the lighting appliances.