| 摘要 |
<p>PURPOSE:To prevent duplicated limit information transmission by sending control information to an adjacent node on the condition that flag information is a set state when the state of an adjacent link is changed on a communication route. CONSTITUTION:When the communication route is established between nodes N1 and N5, the route establishing flag is a set state in the relay nodes N2-N4. If a fault takes place in the information link l1, the node N2 detects it and informs the control information informing link fault to a link l2. Nodes N3-N5 reset route establishing flag information corresponding to a route from the node N1 to the node N5. The node N2 also resets the route establishing flag from the N1 to the N5. Thus, even if a fault takes plate in the link l3, the node N4 detecting it does not give a link fault notice toward the node N5, then useless control information on the communication network is not sent.</p> |
