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Bandwidth monitoring device

  • US 20040184444A1
  • Filed: 01/30/2004
  • Published: 09/23/2004
  • Est. Priority Date: 02/21/2003
  • Status: Active Grant
First Claim
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1. A bandwidth monitoring device for monitoring a packet bandwidth, comprising:

  • a counter residual quantity value determining portion configured to determine a current counter residual quantity value which represents a residual value of a packet length counter value by adding up inputted packet lengths and subtracting outputted packet lengths immediately prior to input of a next input packet; and

    a monitoring results determining portion configured to set determination criteria, and to determine in accordance with the determination criteria whether input packets violate or comply with a monitored bandwidth;

    wherein the determination criteria include a determination criterion, based on the counter residual quantity value from said counter residual quantity value determining portion, that all input packets are in compliance with a monitored bandwidth when the counter residual quantity value is equal to or less than a first threshold value;

    wherein the determination criteria include a determination criterion such that a drop probability, by which a determination is made that input packets violate the monitored bandwidth when the counter residual quantity value exceeds the first threshold value, becomes greater pursuant to increases in the counter residual quantity value; and

    wherein the determination criteria include a determination criterion that all input packets violate a monitored bandwidth when the counter residual quantity value exceeds a second threshold value which is greater than the first threshold value.

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