Patent attributes
In a bandwidth measuring method and device for grasping a traffic general and local trends in consideration of a packet loss, without continuously capturing packets, a simulation is executed by determining a bandwidth limit based on a buffer length, a transmission bandwidth, and a mean packet length collected in an adjoining node or its own node and information of a preset allowable packet loss rate, and by determining an initial value of a transient evaluation type queue simulation for a packet loss rate. An optimum short time interval when the packet loss rate by the simulation approaches the allowable packet loss rate is determined as a packet continuous capture time. Furthermore, packets are continuously captured in the short time interval, and a mean bandwidth of the packets is calculated, so that a general mean bandwidth, or an upper bandwidth or a peak bandwidth is determined from an overall mean bandwidth by repeating the continuous capturing at random within a fixed section.
