| 摘要 |
<p>PURPOSE:To speed up the collection of supervisory information by sending out the supervisory information, when a signal, the broadcasting mode of which is regulated in advance, sent from a master station is received, in such a way that each slave station is responded with the signal and sends the information after the different time lapse regulated in advance not so as to be interfered with each other. CONSTITUTION:The master station sends out a polling signal which requests a report regarding the supervisory information with the broadcasting mode to all of the slave stations. Each of the slave stations A, B, C, D... sends out a burst signal which reports the supervisory information of own station in a time slot after the time lapse regulated in advance for each station. A delay time for each slave station is set as different shifting by one time slot and reporting signals are transmitted continuously to the master station without colliding. Also, it is constituted that, when each slave station receives the polling signal, all transmissions except the reporting of the supervisory information assigned are prohibited for a regulated time (the time until the reporting from all of the slave stations is completed) and the occurrence of collision between a call requesting signal from another station and the reporting signal is prevented.</p> |
