| 摘要 |
<p>PURPOSE:To improve the transmission efficiency of the radio data communication system consisting of one host data transmitter and plural low-order data transmitters. CONSTITUTION:The host data transmitter specifies the low-order data transmitter with an ID (recognition code) 5 in the packet, and the presence or absence of the transmission right is connected by using a data part 6. That is, when the transmission right is given, data is in the data part 6 at the transmission. When no transmission right is given, '0' (NULL) is in the data part 6 at the transmission. Each low-order data transmitter knows the corresponding packet is for its own station by the ID 5 in the packet. When there is data in the data part 6, the data is sent. Thus, there is no need to set the special packet for the transmission right and the bi-directional data transmission efficiency is improved.</p> |
