| 摘要 |
PURPOSE:To enable instant response according to the call and to increase the amount of communication, by commonly using the control information reception/ giving antenna with communication antenna. CONSTITUTION:An exchange station is provided with a communication scanning beam antenna 5 of high gain and control information reception/giving antenna 6. The antenna 6 covers the entire communication objective area at the same time and makes the transmission/reception of the control signal such as call signal. When the address of the station 7 and the incoming station 8 is informed to the exchange station from the call station 7, from the address of the stations 7, 8 in reception with the antenna 6, the signal controlling the beam scanning of the antenna 5 is produced, and the signal directs the antenna beam to the stations 7 and 8 only, allowing to made reception/transmission between the stations 7 and 8. In this case, with the synchronizing signal received at the antenna 6, the synchronism for TDMA communication by the antenna 5 is taken among a plurality of communication stations. Thus, since the beam is switched to the direct call station and the incoming station only, the time when no communication is made is reduced and the amount of communication is increased. |
