COMMUNICATION SYSTEM, COMMUNICATION METHOD, BASE STATION DEVICE, AND COMMUNICATION DEVICE

A first terminal device transmits a first preamble signal representing a first value to the base station. A second terminal device transmits a second preamble signal representing a second value to the base station. The base station identifies the first and second value when the base station has received the first and second preamble signal. The base station compares a threshold with the first value, and compares the threshold with the second value. The base station gives priority to establishment of a connection with the first terminal device over establishment of a connection with the second terminal device when the first value is greater than the threshold and the second value is equal to or smaller than the threshold.