| 摘要 |
PURPOSE: A fast roaming controller device for a train is provided to implement high speed roaming by using simple wireless sensitivity without complex algorithm or protocol. CONSTITUTION: First RF transceivers(10) are installed outside of a railroad along a path for a train. A second RF transceiver(20) is installed inside the train to communicate with one of first RF transceivers in wireless. A high speed roaming controller(30) is connected to the first RF ransceiver inside the station in wire and roams an operation control right to one of the first RF transceivers according to the train passing through a service area.
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