| 摘要 |
Provided is a network system which is coupled to first and second computers including: at least one network node; a network device; and a resource management server. In the network system, QoS requirements are set for a communication between the first and second computers; the second computer measures QoS of the first communication, and transmits the control information including an identifier of the first communication and a result of the measurement of QoS to the first computer; the network device captures the control information, and transmits to the resource management server a message including the identifier of the first communication and the measurement result which are extracted from the captured control information; and the resource management server estimates a cause of failure in satisfying the QoS requirements if the measurement result does not satisfy the QoS requirements, and sets QoS for the network node judged to involve the cause.
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