Method and apparatus for performing multi-symbol rate vectoring
View Patent ↗The present invention is directed to methods and apparatuses for performing concurrent vectoring of systems having communications performed at different symbol rates. In embodiments, where a common binder includes different sub-groups of lines having corresponding different symbol rates, the invention includes methods and apparatuses for managing and concurrently vectoring all the lines of the different sub-groups.
1. A method comprising:
concurrently performing vectoring with a plurality of xDSL modems, wherein certain of the xDSL modems use a first symbol rate, and certain other of the xDSL modems use a second symbol rate, the second symbol rate being slower than the first symbol rate, and wherein concurrently performing the vectoring includes:
in a first subset of symbols at the first symbol rate, causing crosstalk cancellation data to be communicated for both the certain xDSL modems and the certain other xDSL modems; and
in a second subset of symbols at the first symbol rate, causing crosstalk cancellation data to be communicated only for the certain xDSL modems and not for the certain other xDSL modems.
2. The method of claim 1 , wherein the first symbol rate is an integer multiple of the second symbol rate of two or more.
3. The method of claim 1 , further comprising configuring the certain xDSL modems to use tones that are all higher in frequency than tones used by the certain other xDSL modems.
4. The method of claim 1 , wherein the plurality of xDSL modems are all incorporated in the same modem chip.
5. The method of claim 1 , further comprising configuring a first vector-group for the certain xDSL modems and a second vector-group for the certain other xDSL modems.
6. The method of claim 5 , wherein concurrently performing the vectoring includes managing crosstalk cancellation data communicated during each symbol period at the first symbol rate in accordance with the configured first and second vector-groups.
7. The method of claim 5 , further creating a bit mask identifying which of the plurality of xDSL modems belong to the configured first and second vector-groups, and wherein concurrently performing the vectoring includes managing crosstalk cancellation data communicated during each symbol period at the first symbol rate in accordance with the bit mask.
8. The method of claim 1 , wherein a time period associated with a total of the first and second subsets of symbols corresponds to the second symbol rate.
9. The method of claim 1 , wherein all of the plurality of xDSL modems are coupled to lines in the same binder.
10. An apparatus comprising:
a plurality of xDSL modems, wherein certain of the xDSL modems use a first symbol rate, and certain other of the xDSL modems use a second symbol rate, wherein the second symbol rate is slower than the first symbol rate; and
a vector control entity that concurrently performs vectoring with both the certain of the xDSL modems using the first symbol rate, and the certain other of the xDSL modems using the second symbol rate, wherein the vector control entity concurrently performs the vectoring by:
in a first subset of symbols at the first symbol rate, causing crosstalk cancellation data to be communicated for both the certain xDSL modems and the certain other xDSL modems; and
in a second subset of symbols at the first symbol rate, causing crosstalk cancellation data to be communicated only for the certain xDSL modems and not for the certain other xDSL modems.
11. The apparatus of claim 10 , wherein the first symbol rate is an integer multiple of the second symbol rate of two or more.
12. The apparatus of claim 10 , further comprising a controller that configures the certain xDSL modems to use tones that are all higher in frequency than tones used by the certain other xDSL modems.
13. The apparatus of claim 10 , wherein the plurality of xDSL modems are all incorporated in the same modem chip.
14. The apparatus of claim 10 , further comprising a controller that configures a first vector-group for the certain xDSL modems and a second vector-group for the certain other xDSL modems.
15. The apparatus of claim 14 , wherein the vector control entity concurrently performs vectoring by managing crosstalk cancellation data communicated during each symbol period at the first symbol rate in accordance with the configured first and second vector-groups.
16. The apparatus of claim 14 , wherein the controller further creates a bit mask identifying which of the plurality of xDSL modems belong to the configured first and second vector groups, and wherein the vector control entity concurrently performs vectoring by managing crosstalk cancellation data communicated during each symbol period at the first symbol rate in accordance with the bit mask.
17. The apparatus of claim 10 , wherein a time period associated with a total of the first and second subsets of symbols corresponds to the second symbol rate.
18. The apparatus of claim 10 , wherein all of the plurality of xDSL modems are coupled to lines in the same binder.