Method for computing aggregate traffic between adjacent points of presence in an internet protocol backbone network
First Claim
1. A method for determining link utilization in an IP network, the method comprising:
- collecting utilization values for links in the IP network over a predetermined polling period;
collecting topological information for links in the IP network, the topological information identifying each link connecting each adjacent Point of Presence;
correlating the link utilization values with the topological information;
summing the link utilization values for all links connecting a pair of Points of Presence over a predetermined measurement period;
dividing the sum by the number of link utilization values included in the sum to give an average link utilization; and
multiplying the average link utilization by the number of links connecting the pair of Points of Presence to calculate a measure of total traffic flowing between the pair of Points of Presence that is insignificantly effected by one or more missing utilization values.
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Abstract
The present invention provides a method for computing traffic between a pair of Points of Presence in an IP network by summing link utilization values measured for each link connecting a pair of Points of Presence and dividing the sum by the number of link utilization values included in the sum. The resulting average link utilization is the average link utilization of any link in the aggregate and may be multiplied by the number of active links connecting a pair of Points of Presence to reflect the total amount of traffic between the two Points of Presence. Future link utilization may be forecast by modeling the observed traffic between a pair of Points of Presence using wavelet multiresolution analysis to create an approximation curve that captures the long-term trend of link utilization and at least one detail curve that captures the short term deviation of link utilization around the long-term trend. A time series model of the approximation curve may then be constructed and used for forecasting. In a similar fashion, deviation of link utilization may be forecast.
70 Citations
24 Claims
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1. A method for determining link utilization in an IP network, the method comprising:
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collecting utilization values for links in the IP network over a predetermined polling period; collecting topological information for links in the IP network, the topological information identifying each link connecting each adjacent Point of Presence; correlating the link utilization values with the topological information; summing the link utilization values for all links connecting a pair of Points of Presence over a predetermined measurement period; dividing the sum by the number of link utilization values included in the sum to give an average link utilization; and multiplying the average link utilization by the number of links connecting the pair of Points of Presence to calculate a measure of total traffic flowing between the pair of Points of Presence that is insignificantly effected by one or more missing utilization values. - View Dependent Claims (2, 3, 4)
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5. A method for determining link utilization in an IP network, the method comprising:
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collecting link utilization values from routers in the IP network over a predetermined polling period; collecting topological information from routers in the IP network; correlating link utilization values with the topological information by identifying the Points of Presence pairs connected by each link for which a link utilization value was collected; summing the link utilization values for each link connecting a pair of Points of Presence; dividing the sum of link utilization values for the pair of Points of Presence by the number of link utilization values included in the sum to give an average link utilization; and multiplying the average link utilization by the number of links connecting the two Points of Presence to calculate a measure of total traffic flowing between the two Points of Presence that is insignificantly effected by one or more missing utilization values. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for determining aggregate link utilization between two Points of Presence, wherein a plurality of links connects the two Points of Presence, the method comprising:
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collecting link utilization values for one or more links connecting the two Points of Presence over a predetermined polling period, wherein at least one link connecting the two Points of Presence corresponds with one or more missing utilization values over the predetermined polling period; summing the link utilization values for all links connecting the two Points of Presence over a predetermined measurement period; dividing the sum by the number of link utilization values included in the sum to give an average link utilization; and multiplying the average link utilization by the number of links connecting the two Points of Presence to calculate a measure of total traffic flowing between the two Points of Presence that is insignificantly effected by the one or more missing utilization values. - View Dependent Claims (17, 18, 19)
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20. At least one machine readable media for causing at least one network management station in an IP network to perform a method for determining link utilization in an IP network, the method comprising:
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collecting incoming and outgoing link utilization values from routers over a predetermined polling period; correlating the link utilization values with the topological information; summing the link utilization values collected over a first predetermined time period for links connecting a pair of Points of Presence, wherein at least one link connecting the pair of Points of Presence has one or more missing utilization values; dividing the sum by the number of link utilization values included in the sum to give an average link utilization; calculating a measure of total traffic flowing between the pair of Points of Presence by multiplying the average link utilization by the number of links connecting the pair of Points of Presence to compensate for the one or more missing utilization values of the at least one link connecting the pair of Points of Presence; and collecting topological information from the routers at one or more second predetermined time intervals, the topological information identifying each link connecting the pair of Points of Presence. - View Dependent Claims (21, 22, 23, 24)
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Specification