Back to results
US 7,460,498 B2Granted
System and method for detecting anomalies along telecommunication lines
AssigneeAdtran, Inc.
InventorsGary Hunt, Fred Chu, Lee T. Gusler, Jr.
Life of this patent
Estimating the term…
Abstract
An anomaly detection system comprises an echo canceler and anomaly detection logic. The echo canceler has a plurality of taps respectively associated with a plurality of tap coefficients. The anomaly detection logic is configured to determine a difference between a new tap coefficient associated with one of the taps and a previous tap coefficient associated with the one tap. The anomaly detection logic is configured to perform a comparison between the difference and a threshold and to detect an anomaly along a telecommunication line based on the comparison.
Claims32
An anomaly detection system, comprising:
- an echo canceler having a plurality of taps respectively associated with a plurality of tap coefficients;
- and
- anomaly detection logic configured to determine a difference between a new tap coefficient associated with one of the taps and a previous tap coefficient associated with the one tap, the anomaly detection logic configured to perform a comparison between the difference and a threshold and to detect an anomaly along a telecommunication line based on the comparison,
- wherein the anomaly causes a resistance at a point on the telecommunication line to vary over time.
1 more element
An anomaly detection system, comprising:
- an echo canceler having a plurality of taps respectively associated with a plurality of tap coefficients;
- and
- anomaly detection logic configured to determine when at least one of the tap coefficients fluctuates by at least a specified amount and to detect an anomaly along a telecommunication line based on a detection, by the logic, that the at least one tap coefficient fluctuated by at least the specified amount.
An anomaly detection system, comprising:
- an echo canceler having a plurality of taps respectively associated with a plurality of tap coefficients;
- and
- anomaly detection logic configured to establish a set of baseline tap coefficients based on the tap coefficients, the anomaly detection logic configured to compute differences between new tap coefficients of the echo canceler and the baseline tap coefficients and to detect, based on the differences, a time varying anomaly along a telecommunication line at a junction of two sections of the telecommunication line.
An anomaly detection method, comprising the steps of:
- determining a difference between a new tap coefficient associated with a tap of an echo canceler and a previous tap coefficient associated with the tap;
- comparing the difference to a threshold;
- and
- detecting an anomaly along a telecommunication line based on the comparing step, the anomaly causing a time varying change in a transmission characteristic of a point along the transmission line.
1 more element
An anomaly detection method, comprising the steps of:
- monitoring a plurality of tap coefficients of an echo canceler;
- determining when at least one of the tap coefficients fluctuates by at least a specified amount;
- and
- detecting an anomaly along a telecommunication line based on the determining step, the anomaly causing a time varying change in resistance at a point along the transmission line.
1 more element
An anomaly detection method, comprising the steps of:
- establishing a set of baseline tap coefficients based on a set of tap coefficients of an echo canceler;
- computing differences between the baseline tap coefficients and new tap coefficients of the echo canceler;
- and
- detecting an anomaly along a telecommunication line based on the differences, the anomaly causing a time varying change in resistance at a junction of two sections of the telecommunication line.
1 more element
An anomaly detection method, comprising the steps of:
- establishing a set of baseline tap coefficients based on a set of tap coefficients of an echo canceler;
- computing differences between the baseline tap coefficients and new tap coefficients of the echo canceler;
- detecting an anomaly along a telecommunication line based on the differences;
- comparing the differences to a plurality of thresholds, wherein the detecting step is further based on the comparing step;
- and
- updating at least one of the baseline tap coefficients in response to a comparison between one of the differences and one of the thresholds.
3 more elements
An anomaly detection system, comprising:
- an echo canceler having a plurality of taps respectively associated with a plurality of tap coefficients;
- and
- anomaly detection logic configured to determine a difference between a new tap coefficient associated with one of the taps and a previous tap coefficient associated with the one tap, the anomaly detection logic configured to perform a comparison between the difference and a threshold and to detect an anomaly alone a telecommunication line based on the comparison,
- wherein the new tap coefficient is based on a first digital signal transmitted from a transmitter at one end of the telecommunication line to a receiver at another end of the telecommunication line, and wherein the previous tap coefficient is based on a second digital signal transmitted from the transmitter to the receiver.
1 more element
A system, comprising:
- a receiver coupled to a telecommunication line, the receiver configured to receive digital signals transmitted from a remote transmitter via the telecommunication line, the telecommunication line having a time varying anomaly causing a resistance at a point on the telecommunication line to fluctuate over time thereby degrading the digital signals;
- and
- anomaly detection logic configured to detect the anomaly and to provide an indication of a location of the anomaly.
Dependencies are inferred from the claim text.