COMMUNICATION SYSTEM AND MASTER STATION, SLAVE STATION, AND RELAY STATION USED THEREIN

摘要

PROBLEM TO BE SOLVED: To enable an operator who does maintenance of a traffic wireless LAN to easily grasp reception quality of each channel being used, without requiring the manpower.

SOLUTION: According to the present invention, there is provided a communication system formed of a wireless LAN for wirelessly transmitting traffic information used for control of traffic signals. Each of a plurality of communication nodes forming a wireless LAN comprises: a measurement section (control section 10) which measures a reception quality of a station of a channel being used; a communication control section (control section 10) which stores the measured reception quality of a station in a communication frame addressed to another station; and an output section (display section 13) which outputs the measured reception quality of the station and the reception quality of said another station included in the communication frame received by the station in a human-readable format.

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