| 摘要 |
In a communication network system with a plurality of nodes connected to a common transmission line, each master candidate node includes an idle time measurement device for measuring an idle time of the transmission line. Once each master candidate node acquires the master privilege and becomes a master node, the master node retains a master privilege until the idle time of the transmission line exceeds a longest of the privilege acquisition idle time widths of the master candidate nodes, the root node transmits a start frame indicating start of a next communicant cycle and the idle time measurement device is cleared upon receipt of the start frame. |
