Link-quality estimation and anomaly detection in high-speed wireline receivers
An integrated Circuit (IC) for use in a network device includes a receiver and a Link Quality Estimation Circuit (LQEC). The receiver is configured to receive a signal over a link and to process the received signal. The LQEC is configured to predict a link quality measure indicative of communication quality over the link in the future, by analyzing at least one or more settings of circuitry of the receiver, and to initiate a responsive action depending on the predicted link quality measure.
1. An Integrated Circuit (IC) for use in a network device, the IC comprising:
a receiver, which is configured to receive a signal over a link and to process the received signal; and
a Link Quality Estimation Circuit (LQEC), which is configured to run an Artificial Prediction (AI) model that predicts a link quality measure indicative of a probability that the link will fail within a future time interval having a predefined length, wherein the AI model predicts the link quality measure by analyzing at least one or more settings of circuitry of the receiver, and to initiate a responsive action depending on the predicted link quality measure.
2. The apparatus according to claim 1 , wherein the LQEC is configured to initiate the responsive action by initiating a diversion of subsequent communication, at least partially, from the link to another link.
3. The apparatus according to claim 1 , wherein, by analyzing the settings of the circuitry of the receiver over time, the LQEC is configured to predict a future value or trend of the link quality measure, and to initiate the responsive action depending on the predicted future value or trend.
4. The apparatus according to claim 1 , wherein the LQEC is configured to predict the link quality measure by jointly analyzing (i) the one or more settings of the circuitry of the receiver, and (ii) one or more parameters of the received signal.
5. The apparatus according to claim 1 , wherein the LQEC is configured to initiate the responsive action by initiating a decrease of a data rate of the signal.
6. The apparatus according to claim 1 , wherein the LQEC is configured to initiate the responsive action by initiating a change in an encoding scheme used for encoding the signal.
7. The apparatus according to claim 1 , wherein the LQEC is configured to predict the link quality measure by analyzing, over time, at least one setting of the circuitry of the receiver, selected from among:
a gain of a Clock Data Recovery (CDR) circuit;
a bandwidth of the CDR circuit;
a response of an analog equalization filter;
a setting of an Analog to Digital Converter (ADC);
tap values of a digital equalizer;
an Automatic Gain Control (AGC) setting; and
a slicer threshold.
8. The apparatus according to claim 1 , wherein the receiver is disposed in a deserializer.
9. A method for use in a network device, the method comprising:
using a receiver, receiving a signal over a link and processing the received signal;
running an Artificial Prediction (AI) model that predicts a link quality measure indicative of a probability that the link will fail within a future time interval having a predefined length, wherein the AI model predicts the link quality measure by analyzing at least one or more settings of circuitry of the receiver; and
initiating a responsive action depending on the predicted link quality measure.
10. The method according to claim 9 , wherein initiating the responsive action comprises initiating a diversion of subsequent communication, at least partially, from the link to another link.
11. The method according to claim 9 , wherein analyzing the settings of the circuitry of the receiver over time comprises predicting a future value or trend of the link quality measure, and wherein initiating the responsive action is performed depending on the predicted future value or trend.
12. The method according to claim 9 , wherein predicting the link quality measure comprises jointly analyzing (i) the one or more settings of the circuitry of the receiver, and (ii) one or more parameters of the received signal.
13. The method according to claim 9 , wherein initiating the responsive action comprises initiating a decrease of a data rate of the signal.
14. The method according to claim 9 , wherein initiating the responsive action comprises initiating a change in an encoding scheme used for encoding the signal.
15. The method according to claim 9 , wherein predicting the link quality measure comprises analyzing, over time, at least one setting of the circuitry of the receiver, selected from among:
a gain of a Clock Data Recovery (CDR) circuit;
a bandwidth of the CDR circuit;
a response of an analog equalization filter;
a setting of an Analog to Digital Converter (ADC);
tap values of a digital equalizer;
an Automatic Gain Control (AGC) setting; and
a slicer threshold.
16. The method according to claim 9 , wherein the receiver is disposed in a deserializer.