Special operations channel in vectored systems
View Patent ↗Methods and devices are provided wherein a signal sent on a special operation channel is modified by an identification of a line.
1. A method, comprising:
assigning an identification to each line associated with a provider equipment; and
transmitting a special operation channel (SOC) signal over at least one of the lines, wherein SOC symbols of the SOC signal transmitted over each of the at least one of the lines are modified by the identification of that line.
2. The method of claim 1 , wherein the identification comprises an identification polynomial.
3. The method of claim 2 , wherein the modifying comprises at least one of multiplying the SOC signal with the identification polynomial or merging the SOC signal with the identification polynomial.
4. The method of claim 1 , wherein the modifying is performed prior to modulating the SOC signal by a control or management data message.
5. The method of claim 1 , wherein the identification is based on at least one of a Walsh-Hadamard sequence or a three-state sequence.
6. The method of claim 1 , further comprising, at a receiver, distinguishing a SOC signal received via a direct channel from an SOC signal received via crosstalk based on the identification.
7. The method of claim 6 , further comprising performing at least one of a vector training or a frequency equalizer training based on the SOC signal received via the direct channel.
8. The method of claim 1 , further comprising modulating training symbols with orthogonal sequences, and performing a training based on the training symbols.
9. A device, comprising a transmitter,
the transmitter being adapted to transmit a special operation channel (SOC) signal over at least one of a plurality of lines, wherein SOC symbols of the SOC signal are modified by the identification of the respective line, an identification being assigned to each line associated with a provider equipment.
10. The device of claim 9 , wherein the identification is an identification polynomial.
11. The device of claim 9 , wherein for the modifying the transmitter is adapted to at least one of multiplying the SOC signal with the identification polynomial or merging the SOC signal with the identification polynomial.
12. The device of claim 9 , wherein the transmitter is adapted to perform the modifying prior to modulating the SOC signal by a control or management data message.
13. The device of claim 9 , wherein the identification is based on at least one of a Walsh-Hadamard sequence or a three-state sequence.
14. The device of claim 9 , further being adapted to modulate training symbols with orthogonal sequences.
15. A device, comprising a receiver,
the receiver being adapted to receive a special operation channel (SOC) signal over at least one of the lines, wherein SOC symbols of the SOC signal are modified by a respective identification, an identification being assigned to each line associated with a provider equipment,
the device being adapted to distinguish a SOC signal received via a direct channel from an SOC signal received via crosstalk based on the identification.
16. The device of claim 15 , wherein the identification is an identification polynomial.
17. The device of claim 15 , wherein the identification is based on a Walsh-Hadamard sequence.
18. The device of claim 15 , wherein the identification is based on a three-state sequence.
19. The device of claim 15 , further being adapted to perform a vector training based on the SOC signal received via the direct channel.
20. The device of claim 15 , further being adapted to perform a frequency equalizer training based on the SOC signal received via the direct channel.