| 摘要 |
PROBLEM TO BE SOLVED: To suppress transmission delay of detection information.SOLUTION: A relay processing part 20 is configured to, when a relay communication part 21 receives a wireless signal, make the relay communication part 21 transmit such a wireless signal that a group number corresponding to a group number to which an identification code that is set to a transmission source address of the wireless signal belongs is set to a transmission destination address, on the basis of correspondence. A wireless communication part 14 of each illuminating device 1 acquires detection information from the wireless signal when the group number set to the transmission destination address of the received wireless signal is accorded with the group number to which the own device belongs. Thus, although the individual illuminating devices 1 communicate the detection information in each group, because a relay device 2 relays the detection information between the illuminating devices 1 belonging to different groups, communication delay of the detection information can be suppressed compared with a conventional art. |
