| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To restore many communication paths without deteriorating a management efficiency. <P>SOLUTION: A communication path management part 11 manages traffic transfer from a transmission point to a reception point as a subtree, and prepares a standby path with a plurality of subtrees beforehand with respect to an operation path with a plurality of subtrees in order to execute communication control. A priority holding part 12 holds priority imparted by the communication path management part 11 for each subtree. When a failure occurs, the communication path management part 11 compares a summation value of priorities before switching being the summation of priorities imparted to the subtrees inoperable on the operation path with a summation value of priorities after switching being the summation of priorities imparted to the subtrees inoperable on the standby path. The communication path management part determines whether to execute switching from the operation path to the standby path on the basis of comparison result. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
