| 摘要 |
PURPOSE:To attain a low cost and at the same time to improve the reliability for a communication control system to a travelling object, by deciding a communication fault, a trouble, etc. of the own fixed station on the basis of the data sent from another fixed station, prior to the communication of the own fixed station and the travelling object. CONSTITUTION:The data obtained from the communication with a travelling object 1 are transmitted to other fixed stations 40a-40n which are decided centering on the own fixed stations 40a-40n. Then a proximity display, etc. of the object 1 are carried out at corresponding other stations 40a-40n. At the same time, a communication fault, a trouble, etc. are decided on the basis of the data obtained from the communication between the own fixed stations 40a-40n as well as the data given from other fixed stations 40a-40n and prior to the communication between the own fixed stations 40a-40n and the object 1. |
