| 摘要 |
PROBLEM TO BE SOLVED: To continue data communication processing on a center side by preliminarily acquiring time when data communication stops in situation in which a radio channel is disconnected and the data communication stops in data communication utilizing a radio transmission line. SOLUTION: This radio data communication system consists of an application server 101 installed in a center, a radio data communication terminal 104 which performs data communication while being carried, a mobile gateway 102 installed in the center as a repeater between the application server and the radio data communication terminal and a time notifying device 105 which transmits time information T in a fixed cycle. A radio channel is disconnected according to the time information transmitted from the device 105, and communication processing is performed by the mobile gateway while the radio channel is disconnected.
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