COMMUNICATION DEVICE AND COMMUNICATION SYSTEM

摘要

Provided is a communication device which performs data communication via a power cable (3) whose transmission characteristic fluctuates. The device includes: a parameter group setting unit (112) which sets a first transmission parameter group defining a data transmission condition; a limit degree decision unit (40) which decides the limit degree of the transmission parameter group for limiting a part of the first transmission parameter group; a parameter group conversion group (20) which limits the first transmission parameter group to be converted into a second transmission parameter group; a channel communication group (30) which uses the second transmission parameter group outputted from the parameter group conversion unit (20) so as to acquire the result of the transmission parameter evaluation data; and a parameter decision unit (111) which decides an optimal transmission parameter for the current data communication according to the result of the transmission parameter evaluation data outputted from the channel communication unit (30).