Communication system, congestion avoidance method thereof, and meter reading system using communication system

Abstract

The present invention increases accommodation efficiency in a wireless master station for wireless slave stations, and efficiently uses wireless resources while controlling traffic. In a communication system in which a plurality of wireless slave stations---, . . . , perform wireless communication with wireless master stations-and-directly or through another wireless slave station and which performs communication from the wireless master stations with a collection control deviceby means of wired communication or the like. The collection control devicestores first through fourth threshold values a, b, c, and d in memory, and makes efficient use while suppressing traffic by performing a 'connection suppression notification', a 'specific high-frequency communication stop notification', and an “accommodation refusal notification”, and performs functionality control through stages according to the number of accommodated wireless slave stations.