COMMUNICATION DEVICE, CONTROL DEVICE, COMMUNICATION METHOD, AND COMMUNICATION PROGRAM

A communication device includes: a clock unit; a communication unit that performs communication; a power monitor that monitors power consumption of the communication unit; a communication speed monitor that monitors communication speed of the communication performed by the communication unit; a communication volume monitor that monitors a communication volume of the communication performed by the communication unit; a time period identification unit that identifies a time period in which the power consumption of the communication unit exceeds a predetermined power on the basis of the power consumption monitored by the power monitor and the time clocked by the clock unit, and a time period in which the communication speed of the communication unit falls below a predetermined communication speed on the basis of the communication speed monitored by the communication speed monitor and the time clocked by the clock unit; and a controller that narrows the communication area of the communication unit so that the communication volume monitored by the communication volume monitor is less than or equal to a predetermined communication volume allowed by the communication unit when a current time clocked by the clock unit is in the time period identified by the time period identification unit.