COMMUNICATION METHOD FOR POWER LINE TRANSFER

摘要

PROBLEM TO BE SOLVED: To realize a communication method for power line transfer which is excellent in security of conversation. SOLUTION: A synchronization period (preamble) for synchronizing is provided in a data frame. A synchronization pattern signal peculiar for an own station is preserved in a slave station, and synchronization pattern signals of all slave stations are preserved in a master station. The master station inserts the synchronization pattern signal corresponding to a destination slave station into the synchronization period. The slave station examines matching of codes in the synchronization pattern signals between a received signal and the own station to acquire the synchronization of the received data.