COMMUNICATION SYSTEM, COMMUNICATION NODE, AND COMMUNICATION METHOD

PROBLEM TO BE SOLVED: To reduce influence by noise in communication between communication nodes.SOLUTION: A communication system includes a first communication node and a plurality of second communication nodes for performing communication via the first communication node. The first communication node includes: a plurality of communication modules for modulating by different modulation schemes; a modulation scheme determination unit for determining a modulation scheme set to a destination second communication node on the basis of a message from a second communication node; and a modulation scheme switching unit for switching so that the communication module loaded with the modulation scheme determined by the modulation scheme determination unit among the communication modules transmits the message from the second communication node.