| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a wireless notice broadcast system which is reduced in cost and improved in reliability. <P>SOLUTION: A wireless notice broadcast system comprises a center device 1, an A-D converter 2, a WiMAX base station 3, WiMAX slave stations 4A and 4B, D-A converters 9A and 9B, FM master stations 5A and 5B, a plurality of FM slave stations 6A and 6B, a plurality of receiver terminal devices 7A and 7B, and a transmission line 8 laid between the center device 1 and the receiver terminal devices 7A and 7B. WiMAX communication is performed up to the WiMAX slave stations 4A and 4B and at the FM master stations 5A and 5B, conversion into FM signals is performed, thereby transmitting a notice broadcast signal to the receiver terminal devices 7A and 7B through FM relay by the FM slave stations 6A and 6B. An FM system can perform notice broadcast without a delay. Furthermore, devices according to the FM system are available for the receiver terminal devices 7A and 7B, thereby reducing cost. <P>COPYRIGHT: (C)2010,JPO&INPIT |
