COMMUNICATION SYSTEM AND COMMUNICATION CONTROL METHOD

摘要

A network monitoring unit (10) and a transmission path monitoring unit (22) provided along a wired transmission path connected to a wireless communication device (30) determine a traffic volume by detecting a volume of data on a wired transmission path. Wireless communication devices (30 and 40) change a multi-level modulation scheme based on the determined traffic volume and set transmission power so that a minimum level of data transmission can be guaranteed using a transmission rate corresponding to the multi-level modulation scheme.