| 摘要 |
PROBLEM TO BE SOLVED: To propose a radio communication system which can transmit desired information efficiently to a plurality of mobile stations. SOLUTION: This radio communication system establishes a radio circuit between a base station and a mobile station, and communicates a message with such a signal beam as to substantially direct to only the target mobile station by an antenna with the controllable directivity in the above base station when communicating with one mobile station described above. The above base station can transmit information to a plurality of slave stations at the same time by forming a simultaneous report signal beam directed to the plurality of target mobile stations by the above antenna, thereby transmitting the above information when transmitting the same information to the plurality of mobile stations described above. Consequently, it can transmit the information efficiently, and also it can reduce the interference wave given to other mobile stations since it can reduce transmission power. |
