DSL system training
View Patent ↗Existing and future standardized VDSL2 and other systems can be integrated into and used with a vectored DSLAM or other vectored or non-vectored DSL system, without a new user disrupting service to other users in the same or a nearby binder, in some cases by using transmit power, CARMASK and/or PSDMASK DSL capabilities to reduce both downstream and upstream training-signal levels so that training of a new DSL line is non-disruptive, despite a lack of knowledge of the pre-existing binder. For vectored systems, the crosstalk from that tone can be observed, learned and then added to the vectoring system so that any subsequent excitation on that tone would be eliminated by vector processing. A second tone then can be added in the same way, etc. In non-vectored DSLs that might be operating in a binder or line set, once these non-vectored lines are observed to be present, a vectored line set controller, such as a DSL optimizer, then can anticipate the potential interference from such non-vectored lines.
1. A method of adding a new DSL line set to an already-operating DSL line set, the method comprising:
collecting operational data, via a data collection unit, from the new DSL line set and the already-operating DSL line set;
performing, via an analysis unit coupled to the collection unit, the following operations:
analyzing the collected operational data;
determining an operational configuration for at least one DSL line in the new DSL line set that will allow the new DSL line set to join the already-operating DSL line set without disrupting the already-operating DSL line set;
evaluating data received by the new DSL line set; and
evaluating data received by the already-operating DSL line set; and
sending control signals, via a control signal generator coupled to the analysis unit, to the new DSL line set and to the already-operating DSL line set, further wherein the control signals comprise signals controlling operation of at least one of the following:
the new DSL line set; or
the already-operating DSL line set; and
wherein the controller is configured to evaluate whether crosstalk from the new DSL line set affects the already-operating DSL line set.
2. The method of claim 1 wherein the controller is configured to evaluate whether crosstalk from the new DSL line set affects the already-operating DSL line set by measuring crosstalk levels resulting from transmitting data using the at least one DSL line in the new DSL line set and the already-operating DSL line set concurrently.
3. The method of claim 1 wherein the already-operating DSL line set comprises at least one of the following:
a vectored DSL line set; a single DSL line; or
a plurality of DSL lines; and further wherein the new DSL line set comprises:
a single DSL line; or
a plurality of DSL lines.
4. The method of claim 1 further comprising configuring operation of the already-operating DSL line set to prevent disruption of the already-operating DSL line set by the new DSL line set, wherein configuring operation of the already-operating DSL line set is performed either:
before transmitting data using the at least one DSL line in the new DSL line set and the already-operating DSL line set concurrently; or
after evaluating concurrent use of the new DSL line set and the already-operating DSL line set.
5. The method of claim 1 wherein determining the operational configuration for the at least one DSL line in the new DSL line set comprises using orthogonal training sequences on a plurality of DSL lines in the new DSL line set to permit independent identification of the plurality of DSL lines in the new DSL line set during simultaneous training.
6. The method of claim 1 wherein determining the operational configuration for the at least one DSL line in the new DSL line set comprises setting at least one transmit power level of the at least one DSL line in the new DSL line set to prevent disruptive crosstalk in the already-operating DSL line set.
7. The method of claim 6 wherein setting the at least one transmit power level of the at least one DSL line in new DSL line set to prevent disruptive crosstalk in the already-operating DSL line set comprises using at least one of the following to limit transmit power of the at least one DSL line in the new DSL line set:
CARMASK;
PSDMASK;
MAXNOMATP;
MAXNOMPSD;
MAXRXPWR;
RFIBANDS;
MAXSNRM;
BCAP[n];
Rmax;
upstream Power “Back-Off”;
a carrier mask operational parameter;
a PSD operational parameter;
a data rate operational parameter;
a bit cap operational parameter; or
a margin operational parameter.
8. The method of claim 1 wherein determining the operational configuration for the at least one DSL line in the new DSL line set comprises limiting data transmission by the at least one DSL line in the new DSL line set to at least one tone set configured to prevent disruptive crosstalk in the already-operating DSL line set.
9. The method of claim 1 wherein the control signals sent to the new DSL line set and the already-operating DSL line set comprise signals controlling at least one of the following:
CARMASK;
PSDMASK;
RFIBANDS;
BCAP[n];
a carrier mask operational parameter;
a PSD operational parameter;
a bit cap operational parameter; or
a margin operational parameter.
10. The method of claim 1 wherein the already-operating DSL line set is a vectored DSL line set; further wherein the method further comprises adjusting operation of the vectored DSL line set to integrate the new DSL line set into vectored operation with the vectored DSL line set.
11. The method of claim 10 wherein adjusting operation of the vectored DSL line set to integrate the new DSL line set into vectored operation with the vectored DSL line set comprises:
obtaining vector channel and noise information for the new DSL line set and for the already-operating DSL line set; and
performing vectoring based on the obtained vector channel and noise information.
12. The method of claim 10 wherein adjusting operation of the vectored DSL line set to integrate the new DSL line set into vectored operation with the vectored DSL line set comprises configuring operation of the vectored DSL line set to integrate the new DSL line set into vectored operation with the vectored DSL line set after evaluating concurrent use of the new DSL line set and the already-operating DSL line set.
13. The method of claim 10 wherein adjusting operation of the vectored DSL line set to integrate the new DSL line set into vectored operation with the vectored DSL line set comprises configuring operation of the new DSL line set to integrate the new DSL line set into vectored operation with the vectored DSL line set after evaluating concurrent use of the new DSL line set and the already-operating DSL line set.
14. A controller comprising:
a data collection unit configured to collect operational data from a new DSL line set and an already-operating DSL line set;
an analysis unit coupled to the collection unit, wherein the analysis unit is configured to:
analyze the collected operational data;
determine an operational configuration for at least one DSL line in the new DSL line set that will allow the new DSL line set to join the already-operating DSL line set without disrupting the already-operating DSL line set;
evaluate data received by the new DSL line set; and
evaluate data received by the already-operating DSL line set; and
a control signal generator coupled to the analysis unit, wherein the control signal generator is configured to send control signals to the new DSL line set and to the already-operating DSL line set, further wherein the control signals comprise signals controlling operation of at least one of the following:
the new DSL line set; or
the already-operating DSL line set; and wherein the controller is configured to evaluate whether crosstalk from the new DSL line set affects the already-operating DSL line set.
15. The controller of claim 14 wherein the operational configuration for the at least one DSL line in the new DSL line set comprises setting transmit power for the at least one DSL line in the new DSL line set.
16. The controller of claim 14 wherein the controller is configured to obtain vector channel and noise information for the new DSL line set and the already-operating DSL line set.
17. The controller of claim 14 wherein the already-operating DSL line set comprises at least one of the following:
is a vectored DSL line set;
a single DSL line; or
a plurality of DSL lines.
18. The controller of claim 14 wherein the operational configuration for at least one DSL line in the new DSL line set comprises orthogonal training sequences on a plurality of DSL lines in the new DSL line set to permit independent identification of the plurality of DSL lines in the new DSL line set during simultaneous training.
19. The controller of claim 14 wherein the control signals sent to the new DSL line set and the already-operating DSL line set comprise signals controlling at least one of the following:
CARMASK;
PSDMASK;
RFIBANDS;
BCAP[n];
a carrier mask operational parameter;
a PSD operational parameter;
a bit cap operational parameter; or
a margin operational parameter.
20. A computer program product comprising:
a machine readable medium; and
program instructions contained in the machine readable medium, the program instructions specifying a method of training a new DSL line set to join an already-operating DSL line set, the method comprising:
collecting operational data, via a data collection unit, from the new DSL line set and the already-operating DSL line set;
performing the following operations, via an analysis unit coupled to the collection unit:
analyzing the collected operational data
determining an operational configuration for at least one DSL line in the new DSL line set that will allow the new DSL line set to join the already-operating DSL line set without disrupting the already-operating DSL line set;
evaluating data received by the new DSL line set; and
evaluating data received by the already-operating DSL line set; and
sending control signals, via a control signal generator coupled to the analysis unit, to the new DSL line set and to the already-operating DSL line set, further wherein the control signals comprise signals controlling operation of at least one of the following:
the new DSL line set; or
the already-operating DSL line set; and
wherein the controller is configured to evaluate whether crosstalk from the new DSL line set affects the already-operating DSL line set.