| 摘要 |
PROBLEM TO BE SOLVED: To stably transmit and receive data and to accelerate the effective speed of data transmission even when a PLC master unit modem and many (2,400 at maximum) PLC slave unit modems are connected to a network using PLC communication. SOLUTION: The PLC master unit modem 13 is connected to the pre-branch port of a first branch adapter 15, PLC repeaters 30a and 30b are connected to the post-branch port of the first branch adapter 15, the power line connection port of the PLC repeaters 30a and 30b is connected to the pre-branch port side of a second branch adapter 7, and the PLC slave unit modem 9 is connected to the post-branch port of the second branch adapter 7. The data transmission between the PLC master unit modem 13 and the PLC slave unit modem 9 is executed on the basis of a master frame having at least a synchronizing signal transmission band, and the shared band of user data shared by at least a synchronizing signal transmission band, the PLC master unit modem 13, the PLC repeaters 30a and 30b, and the PLC slave unit modem 9. COPYRIGHT: (C)2010,JPO&INPIT |
