| 摘要 |
<p>PURPOSE:To prevent a normal path bypassed once from being interrupted again by providing the path with a path ID and a version and discriminating the bypassed path based on the pass ID and the version. CONSTITUTION:When a fault takes place at two positions between transmission lines B and C and between transmission lines C and D, nodes B,D use a path ID of a path 1 and its version to inform a bypass command message Ib to termination nodes A, E. The nodes A, E recognize the bypassed path and when the coincidence of the version with the version of the path 1 set to its own node is confirmed, the version is revised to implement bypassing and the path 1 passes through a node F. When only the fault between the transmission lines B,C is restored, the message Ib is informed to the node A and since the version of the node A is dissident with the version of the path 1 of its own node, no bypassing is implemented. The interruption of the normal path bypassed once is not caused by discriminating the necessity of the path bypassing based on the path ID and the version.</p> |
