Claims
- 1. A method of switching a first data rate, said method comprising the steps of:
transmitting a discovery message; receiving a discovery response; transmitting a probe message; transmitting a first probe signal; receiving a probe message response; receiving a second probe signal; negotiating said first data rate; synchronizing at said first data rate; measuring a line quality at said first data rate; determining a second data rate based on said line quality; transmitting a rate change request, including said second data rate; and re-synchronizing at said second data rate.
- 2. The method of claim 1, wherein said negotiating step includes the steps of:
transmitting a first rate message; and receiving a second rate message, including said first data rate.
- 3. The method of claim 1, wherein said negotiating step includes the steps of:
transmitting a first rate message; receiving a second rate message; determining said first data rate; and transmitting a third rate message, including said first data rate.
- 4. The method of claim 1 further comprising the step of gauging a line quality by a recipient of said first probe signal.
- 5. The method of claim 4, wherein said step of gauging said line quality includes measuring an attenuation and a noise margin.
- 6. The method of claim 1 further comprising the step of gauging a line quality during the step of receiving said second probe signal.
- 7. The method of claim 6, wherein said step of gauging said line quality includes measuring an attenuation and a noise margin.
- 8. The method of claim 1, wherein said first probe signal is at one or more data rates.
- 9. The method of claim 8, wherein a recipient of said first probe signal performs line quality measurements at said one or more data rates.
- 10. The method of claim 1, wherein said measuring step measures said line quality based on an attenuation, a noise margin and a bit-error-rate.
- 11. The method of claim 1, wherein said second data rate is higher than said first data rate.
- 12. The method of claim 1, wherein said second data rate is lower than said first data rate.
- 13. The method of claim 1, wherein said steps of measuring, determining, transmitting said second data rate and re-synchronizing are repeated until an optimal data rate is reached.
- 14. The method of claim 1, wherein said steps of measuring and determining are performed continuously, until said second data rate is determined to be different than said first data rate, before performing said step of transmitting said second data rate.
- 15. A method of switching a first data rate, said method comprising the steps of:
transmitting a probe message; transmitting a first probe signal; receiving a probe message response; determining said first data rate; synchronizing at said first data rate; measuring a line quality at said first data rate; determining a second data rate based on said line quality; transmitting a rate change request, including said second data rate; and re-synchronizing at said second data rate.
- 16. The method of claim 15 further comprising the step of transmitting a second probe signal after the step of transmitting said first probe signal, wherein said first probe signal is at a first data rate and said second probe signal is at a second data rate.
- 17. The method of claim 15, wherein said measuring step measures said line quality based on an attenuation, a noise margin and a bit-error-rate.
- 18. The method of claim 15, wherein a recipient of said first probe signal measures an attenuation.
- 19. The method of claim 15, wherein a recipient of said first probe signal measures a noise margin.
- 20. A data signal embodied in a carrier wave, said data signal comprising:
a discovery message; a probe message; a probe signal segment; a first data rate message; a synchronization segment at said first data rate; a data rate change request segment, including a second data rate; and a re-synchronization segment at said second data rate.
- 21. The data signal of claim 20, wherein each of said messages includes a data segment.
- 22. The data signal of claim 20, wherein each of said messages includes an opcode segment.
- 23. The data signal of claim 20, wherein each of said messages includes a checksum segment.
- 24. The data signal of claim 20 further comprising a line quality segment.
- 25. The data signal of claim 24, wherein said line quality segment includes an attenuation segment, a noise margin segment and a bit-error-rate segment.
- 26. A communication device comprising:
a transmitter; a receiver; and a line quality module; wherein said transmitter transmits a probe message, said receiver receives a probe signal, said line quality module measures a first line quality based on said probe signal, said transmitter transmits a rate message including a first data rate, said transmitter and said receiver synchronize with a remote device at said first data rate, said transmitter transmits a data rate change request, including a second data rate, and wherein said transmitter and said receiver re-synchronize with said remote device at said second data rate.
- 27. The communication device of claim 26, wherein said first line quality module measures an attenuation and a noise margin.
- 28. The communication device of claim 26, wherein said line quality module measures a second line quality at said first data rate and determines said second data rate based on said second line quality.
- 29. The communication device of claim 28, wherein said second line quality is based on an attenuation, a noise margin and a bit-error-rate.
RELATED APPLICATIONS
[0001] The present application claims the benefit of U.S. provisional application serial No. 60/166,028, filed Nov. 17, 1999. The present application further claims the benefit of U.S. provisional application serial No. ______, filed Apr. 14, 2000. The present application is also related to U.S. application Ser. Nos. ______ and ______, entitled “DSL Pre-Synchronization Auto Baud” and “DSL Post-Synchronization Auto Baud”, respectively, filed concurrently with the present application. All above-mentioned applications are hereby fully incorporated by reference in the present application.
Provisional Applications (2)
|
Number |
Date |
Country |
|
60166028 |
Nov 1999 |
US |
|
60197047 |
Apr 2000 |
US |
Continuations (1)
|
Number |
Date |
Country |
Parent |
09629563 |
Jul 2000 |
US |
Child |
10310338 |
Dec 2002 |
US |