| 摘要 |
PROBLEM TO BE SOLVED: To provide a disaster prevention wireless system wherein a mobile station can inform a base station about disaster prevention information when call channels of the base station are all busy to which the mobile station is connected. SOLUTION: The disaster prevention wireless system comprises a center station 11 including an operation console 11a, a plurality of base stations 21, 22 connected to the center station 11, and at least the one mobile station 31. The center station stores an operating state of the call channels of a plurality of the base stations in real time, when all the call channels of any of the base stations are fully in use; the concerned base station transmits a signal denoting the fully occupied state of the call channels through a control channel, when making a call to another station via the concerned base station; and the mobile station receiving the signal uses a control channel of the other base station than the concerned base station to make a call request. COPYRIGHT: (C)2006,JPO&NCIPI
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