Training optimization of multiple lines in a vectored system using a prepared-to-join group
A novel procedure is described which provides a method for initialization of a group of CPE devices (short: CPEs) during a training that in part registers capabilities of the CPEs, wherein at least one CPE registers late to the training and thus cannot be registered. In accordance with the example described herein, the method comprises: determining capabilities of the CPEs during a Joining Phase of the training, wherein it is determined whether a CPE device is capable of employing vectoring. The method further comprises placing in a hold status the at least one CPE that registers late by keeping a line active that is coupled to the at least one CPE. Another Joining Phase is provided after the Joining Phase in order to register the at least one CPE which has registered late.
1. A method for initialization of a group of customer premises equipment devices (CPEs) during a training that registers capabilities of the CPEs, wherein at least one CPE registers late to the training and cannot be registered; the method comprising:
determining capabilities of the CPEs during a joining phase of the training, wherein it is determined whether a CPE device is capable of employing vectoring;
placing in a hold status the at least one CPE that registers late by keeping a line active that is coupled to the at least one CPE; and
providing another joining phase after the joining phase to register the at least one CPE that registers late.
2. The method according to claim 1 , further wherein the step of placing in a hold status maintains the line as active by sending signals to the at least one CPE that indicates that the at least one CPE will be registered at a later time.
3. The method of claim 1 wherein the Joining Phase includes a handshake procedure compliant with the ITU-T G.994.1 standard.
4. The method of claim 1 wherein the training includes a Training Phase compliant with the ITU-T G.992.3 and 993.5 standards.
5. The method of claim 1 wherein determining capabilities includes: determining whether the at least one CPE supports being placed in a hold status.
6. The method of claim 1 wherein keeping a line active that is coupled to the at least one CPE includes: sending a signal to the CPE which does neither impact the joining lines nor the lines in Showtime.
7. The method of claim 6 , wherein the signal, which does neither impact the joining lines nor the lines in Showtime, includes only Flag Tones.
8. The method according to claim 1 , wherein the other joining phase is provided directly after the joining phase.
9. The method according to claim 1 , wherein capabilities to be determined include capabilities as defined in ITU-T recommendation G.992.1.
10. The method according to claim 9 , wherein the capabilities include at least echo cancellation capabilities.
11. An apparatus for initialization of a group of customer premises equipment devices (CPEs) during a training that registers capabilities of the CPEs, wherein at least one CPE registers late to the training and cannot be registered, wherein capabilities of the CPEs are determined during a joining phase of the training that determines whether a CPE device is capable of employing vectoring, the apparatus comprising:
a vector engine placing the at least one CPE in a hold status that registers late by keeping a line active that is coupled to the at least one CPE; and
wherein the vector engine provides another joining phase after the joining phase to register the at least one CPE that registers late.
12. The apparatus according to claim 11 , wherein the vector engine places the at least one CPE in a hold status by maintaining the line as active by sending signals to the at least one CPE that indicates that the at least one CPE will be registered at a later time.
13. The apparatus according to claim 11 , wherein the vector engine is a vectoring control entity (VCE) located within an Access Node of a Digital Subscriber Line Access Multiplexer (DLSAM).
14. The apparatus according to claim 11 , wherein the Joining Phase includes a handshake procedure in accordance with the ITU-T G.994.1 standard.
15. The apparatus according to claim 11 , wherein the determined capabilities include the capability of the at least one CPE to be placed in a hold status.
16. The apparatus according to claim 11 , wherein capabilities to be determined include capabilities as defined in ITU-T recommendation G.992.1.
17. The apparatus according to claim 16 wherein the capabilities include at least echo cancellation capabilities.
18. The apparatus according to claim 11 , wherein keeping a line active includes: sending a signal to the CPE which does neither impact the joining lines nor the lines in Showtime.
19. The apparatus according to claim 18 , wherein the signal, which does neither impact the joining lines nor the lines in Showtime, includes only Flag Tones.
20. The apparatus according to claim 11 , wherein the other joining phase is provided directly after the joining phase.
21. A linecard for use in a DSLAM and configured to initialize a group of customer premises equipment devices (CPEs) during a Training Phase in which capabilities of the CPEs are registered,
wherein at least one CPE registers late to the training and cannot be registered,
wherein capabilities of the CPEs are determined during a Joining Phase of the Training Phase for determining whether a CPE device is capable of employing vectoring, the linecard comprising:
a vector engine configured to place the at least one CPE, that registers late, in a hold status by keeping a line active that is coupled to the at least one CPE; and
wherein the vector engine provides another joining phase after the joining phase to register the at least one CPE that registers late.