| 摘要 |
<p>A quality-degraded part estimation device (S1) includes: a flow set decision unit (3), a flow quality information collection unit (1), a path information collection unit (2), a flow link table management unit (4), and a quality-degraded part estimation unit (8). Before creating a flow link table which correlates communication quality of a flow flowing in a network to a link through which the flow flows, the flow set decision unit (3) selects with a higher priority, the flow which passes through nearly 1/2 of the total number of links in the network, as a flow to be registered in the flow link. The flow quality information collection unit (1) collects information on the flow communication quality. The path information collection unit (2) collects path information on the network. The flow link table management unit (4) generates a flow link table by using the communication quality information and the path information. The quality-degraded part estimation unit (8) estimates a quality-degraded link according to the flow link table.</p> |
