| 摘要 |
<p>In a data acquisition system (1), multiple nodes (2) are connected in multiple levels, a tree-structure multi-hop network is configured, and a reader (3) acquires data from one target node (node (B)) among said network. In this case, when the reader (3) uses a specified channel to send a data acquisition request to node (B), as a response to the data acquisition request, node (B) sends timing information to the reader (3), said timing information being about a timing in which node (B) sends/receives data. After synchronizing with the system on the basis of the timing information, the reader (3) performs a temporary connection process that preferentially acquires the data from node (B). The aforementioned procedure is capable of reducing an effect on remote data gathering by the entire system when individual data gathering is done by the reader.</p> |
