METHOD AND APPARATUS FOR DETERMINING QUALITY OF SERVICE

摘要

PROBLEM TO BE SOLVED: To provide a method for estimating the band capacity, the available bandwidth and the utilization along a path in an IP network.

SOLUTION: ICMP time-stamp requests are sent from a transmission source host on the edge or inside the network to all routers on the end-to-end path to a desired destination. Differences between time-stamp values are used as indicators of QoS services at each router. The collected measurements are then processed at the sending source host to infer QoS parameters in term of path capacity in bit/sec, available bandwidth in bits/sec, individual link utilization and congestion at each router. These parameters can be combined to infer the QoS service in terms of bandwidth on the end-to-end path.

COPYRIGHT: (C)2005,JPO&NCIPI