| 摘要 |
PROBLEM TO BE SOLVED: To more surly facilitate a communication between an unmanned work device such as work machines and a control station even if there are radio wave obstructions between the work place where the unmanned work device performs the work and the control station for the unmanned work device. SOLUTION: A radio trunk circuits 5 for work radios 91, 111, 131A, and 131B are established by arranging a plurality of relay radios 51A, 51B, and 51C in a distance between unmanned work devices 9, 11, 13A, and 13B in the control station 1 so that they can transmit and receive to/from one another. The work radios 91, 111, 131A, and 131B are connected to the relay radios 51A, 51B, and 51C inside a radio zone where wireless communication with the radio trunk circuit 5 is possible and information transmission is possible with the work radios 91, 111, 131A, and 131B via the radio trunk circuit 5. COPYRIGHT: (C)2007,JPO&INPIT |
