| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a communication quality monitoring apparatus, communication quality monitoring system, communication quality monitoring method and quality monitoring program in which a bottleneck interval in communication can be detected with high accuracy, in a higher layer network that includes a rate control mechanism. <P>SOLUTION: An SLA monitoring apparatus (communication quality monitoring apparatus) 70 comprises: a quality report collecting section 71 for receiving a quality report obtained by collecting the status, or the like, of a transmission buffer of a relay node device, or the like; a bottleneck candidate determination section 72 for determining a relay node device, or the like, of which the transmission queue length exceeds a certain setting value, as a bottleneck candidate based on the quality report; a RWIN propagation effect determining section 73 for deleting a candidate caused by the congestion at a receiving side of a next-hop relay node of the bottleneck candidate; and a Next Hop quality deterioration confirmation section 74 for further deleting a candidate, based on a congestion state of the next-hop relay node device or the like connected to the deleted candidate from among the bottleneck candidates. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
