Back to results
US 6,725,176 B1Granted
Loop diagnostics for ADSL systems
AssigneeCentilliune Communications, Inc.
InventorsGuozhu Long, Jalil Kamali, Syed A. Abbas, Steven R. Blackwell
Life of this patent
Estimating the term…
Abstract
The present invention provides techniques for performing loop diagnostics in DSL communication systems.
Claims26
A method of performing loop diagnostics in a DSL system, the method comprising:
- entering a loop diagnostic mode;
- measuring incoming noise during a quiet mode where no signals are transmitted or received;
- receiving a probe signal having known transmit characteristics;
- measuring characteristics of the received probe signal;
- and
- determining loop diagnostic information based on received probe signal characteristics and known transmit characteristics.
3 more elements
A modem for performing loop diagnostics in a DSL system, the modem comprising:
- a probe signal reception module adapted to receive a probe signal having known transmit characteristics, and to measure received characteristics of the probe signal, the probe signal reception module further adapted to measure incoming noise during a quiet mode where no signals are transmitted or received;
- and
- an analysis module in communication with the probe signal reception module, the analysis module adapted to determine loop diagnostic information based on received probe signal characteristics and known transmit characteristics.
A method of performing loop diagnostics in an ADSL system, the method comprising:
- entering a loop diagnostic mode in response to at least one of a repeated link initialization failure or a troubleshooting call;
- receiving a probe signal having known transmit characteristics including transmit power per subchannel;
- measuring received characteristics of the probe signal including received signal power per subchannel;
- measuring incoming noise PSD during a quiet mode where no signals are transmitted or received;
- and
- determining loop diagnostic information based on received probe signal characteristics and known transmit characteristics.
3 more elements
Dependencies are inferred from the claim text.