| 摘要 |
PURPOSE:To prevent the influence of a building or the like due to a wave propagation state and to prevent the generation of misdisplay. CONSTITUTION:Plural positional information sending circuits 4 for sending positional information are respectively arranged on gates G1 to G7 arranged in radio zones Z1 to Z5 and the positional information sent from the circuits 4 is stored in mobile radio stations PQ1 to PQ3 getting into/out from the gates G1 to G7. When a mobile radio station moves among plural radio zones, the positional information stored in the mobile radio station and the identification(ID) number of the mobile radio station are transmitted to a base station MQ through fixed stations ZA1 ZB2, ZC3 arranged in the radio zones and the base station MQ receives the positional information sent from the fixed stations ZA1, ZB2, ZC3 and the ID number of the mobile radio station by an emergency information receiving circuit 2. |
