Communication channel capacity estimation

摘要

Prediction of a channel capacity is accomplished based on a TDR echo without explicitly estimating the topology of the line. The prediction is based on obtaining a measured TDR echo, determining a theoretical TDR echo for a plurality of loop lengths, estimating the equivalent TDR length based on an optimization, updating the equivalent TDR length and utilizing the updated TDR length to predict one or more of the upstream and downstream data rates.

主权项

1. A data rate prediction method for a communications system comprising:
obtaining a measured TDR (Time Domain Reflectometry) echo at a channel capacity estimator; determining, at least using a memory and processor, a set of theoretical TDR echo values for a plurality of loop lengths of a communication line; estimating, using the processor, an equivalent TDR length based on an error minimization optimization that includes the theoretical TDR echo values and the measured TDR echo; updating the equivalent TDR length; and utilizing the updated TDR length to predict one or more of upstream and downstream DSL (Digital Subscriber Line) data rates.