High speed multiple loop DSL system

• US 20050152385A1
• Filed: 03/25/2004
• Published: 07/14/2005
• Est. Priority Date: 12/07/2003
• Status: Active Grant

• Current Assignee: Assia Spe LLC
• Original Assignee: Adaptive Spectrum and Signal Alignment, Incorporated
• Inventors: Cioffi, John M.
• Granted Patent: US 7,639,596 B2
• Time in Patent Office: Days
• US Class Current: 370/420
• CPC Class Codes: H01L 2924/00011 Not relevant to the scope of the group, the symbol of which is combined with the symbol of this group
• CPC Class Codes: H01L 2924/01004 Beryllium [Be]
• CPC Class Codes: H04B 3/32 Reducing cross-talk, e.g. by compensating
• CPC Class Codes: H04B 3/487 Testing crosstalk effects
• CPC Class Codes: H04L 1/0002 by adapting the transmission rate
• CPC Class Codes: H04L 1/0019 in which mode-switching is based on a statistical approach
• CPC Class Codes: H04L 12/2856 Access arrangements, e.g. Internet access asynchronous transfer mode networks H04L12/5601; broadband local area networks H04L12/2801; optical access or distribution networks H04Q11/0067; access to open networks H04L12/5691; digital subscriber line end-user equipment and bit-level processing of data on a PSTN-based network H04M11/00; home network gateways H04L12/2834; wireless access networks H04W
• CPC Class Codes: H04L 12/2859 Point-to-point connection between the data network and the subscribers encapsulation H04L12/4633; virtual LANs H04L12/4641; routing of packets H04L45/00
• CPC Class Codes: H04L 12/2874 Processing of data for distribution to the subscribers
• CPC Class Codes: H04L 12/2898 Subscriber equipments DSL modems H04M11/062; cable modems H04L12/2801
• CPC Class Codes: H04L 12/6418 Hybrid transport
• CPC Class Codes: H04L 2012/6478 Digital subscriber line, e.g. DSL, ADSL, HDSL, XDSL, VDSL
• CPC Class Codes: H04L 25/0272 Arrangements for coupling to multiple lines, e.g. for differential transmission
• CPC Class Codes: H04L 25/0278 Arrangements for impedance matching
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04L 41/0806 for initial configuration or provisioning, e.g. plug-and-play
• CPC Class Codes: H04L 41/0853 by actively collecting configuration information or by backing up configuration information
• CPC Class Codes: H04L 41/142 using statistical or mathematical methods
• CPC Class Codes: H04L 43/00 Arrangements for monitoring or testing data switching networks
• CPC Class Codes: H04L 43/0829 Packet loss
• CPC Class Codes: H04L 43/0847 : Transmission error
• CPC Class Codes: H04L 43/0888 : Throughput
• CPC Class Codes: H04L 43/0894 : Packet rate
• CPC Class Codes: H04L 43/106 : using time related information in packets, e.g. by adding timestamps
• CPC Class Codes: H04L 43/16 : Threshold monitoring
• CPC Class Codes: H04L 5/0044 : allocation of payload
• CPC Class Codes: H04M 11/062 : using different frequency bands for speech and other data
• CPC Class Codes: H04M 3/2209 : for lines also used for data transmission
• CPC Class Codes: H04M 3/30 : for subscriber's lines , for the local loop
• CPC Class Codes: H04M 3/304 : and using xDSL modems xDSL line qualification H04M3/306
• CPC Class Codes: H04M 3/34 : Testing for cross-talk

Abstract

A DSL system includes a multiple loop segment where K loops are bonded to provide a multiple loop segment having up to (2K−1) communication channels on which transmissions are vectored. The segment may be a drop to a customer premises, an inter-pedestal link, or any other suitable part of a larger DSL system. Generally the bonded loops are relatively short, being 300 meters or less. Signal vectoring is used to increase the speed and data carrying capability of the channels. In some embodiments, an expanded frequency spectrum also can be used to increase the data carrying capability of one or more of the channels. An impedance matching circuit may be coupled to each end of the segment to provided efficient transmission of data across the segment. A controller may provide control signals used to operate the segment as a vectored system and, if desired, frequency bandwidth control signals. The controller may monitor and/or collect data and information from the DSL system to assist in generating control signals. The controller can be a dynamic spectrum manager or DSM Center that includes a computer system and/or other hardware to assist in performing the required functions.

Claims

1. A DSL system comprising:

a multiple loop segment, comprising K bonded loops providing up to (2K−

1) communication channels; and

a controller coupled to the segment and configured to provide control signals used to operate the segment as a vectored system.

2. The DSL system of claim 1 wherein the controller comprises vectoring control means and further wherein a customer vectoring unit (CVU) is coupled to a first end of the segment and to the vectoring means and further wherein a pedestal VU (PVU) is coupled to a second end of the segment and to the vectoring means.

3. The DSL system of claim 2 wherein the PVU is in a pedestal and further wherein the CVU is in a customer premises.

4. The DSL system of claim 2 wherein the PVU is in a first pedestal and further wherein the CVU is in a second pedestal.

5. The DSL system of claim 2 wherein the PVU comprises a vector signal processing module coupled to the controller and further wherein the CVU comprises a vector signal processing module coupled to the controller.

6. The DSL system of claim 1 wherein at least one of the communication channels is operated using an expanded frequency spectrum.

7. The DSL system of claim 1 wherein the controller comprises means for controlling the frequency bandwidth used in transmitting data across the segment.

8. The DSL system of claim 1 wherein the controller is a dynamic spectrum manager comprising vectoring control means comprising a computer system.

9. The DSL system of claim 1 wherein the controller comprises a computer system.

10. The DSL system of claim 1 further comprising a first impedance matching circuit coupled to a first end of the segment and a second impedance matching circuit coupled to a second end of the segment.

11. The DSL system of claim 1 wherein the DSL system is an ADSL system.

12. The DSL system of claim 1 wherein the DSL system is a VDSL system.

13. The DSL system of claim 1 wherein the loops are bonded using one of the following bonding protocols:

TDIM bonding;

Ethernet bonding;

ATM bonding;

or

the G.bond protocol.

14. A DSL system comprising:

a multiple loop segment, comprising K bonded loops providing up to (2K−

1) communication channels on (2K−

1) wires;

a first vectoring unit coupled to a first end of the segment and comprising a first vector signal processing module;

a second vectoring unit coupled to a second end of the segment and comprising a second vector signal processing module; and

wherein the first and second vectoring units provide vectored transmissions across the segment.

15. The DSL system of claim 14 further comprising a controller coupled to the first and second vectoring units, wherein the controller comprises vectoring control means, wherein the vectoring control means assists in regulating transmissions across the segment.

16. The DSL system of claim 14 wherein the first vectoring unit is in a first pedestal and further wherein the second vectoring unit is in a second pedestal.

17. The DSL system of claim 14 wherein the first vectoring unit is in a customer premises and further wherein the second vectoring unit is in a pedestal.

18. The DSL system of claim 14 wherein the controller is a dynamic spectrum manager.

19. The DSL system of claim 14 wherein the controller further comprises frequency bandwidth control means for regulating the frequency bandwidth used in transmissions across the segment.

20. The DSL system of claim 14 further comprising a first impedance matching circuit coupled to the first end of the segment and a second impedance matching circuit coupled to the second end of the segment.

21. A DSL system comprising:

a multiple loop segment, comprising K bonded loops providing up to (2K−

1) communication channels on (2K−

1) wires;

a first impedance matching circuit coupled to a first end of the segment;

a first vector signal processing module coupled to the first impedance matching circuit;

a second impedance matching circuit coupled to a second end of the segment;

a second vector signal processing module coupled to the second impedance matching circuit; and

a controller coupled to the first and second vector signal processing modules comprising;

means for collecting data regarding transmissions across the segment; and

means for controlling vectoring of transmissions across the segment;

wherein the first and second vector signal processing modules process transmissions across the segment.

22. The DSL system of claim 21 wherein the first and second vector signal processing modules provide two-sided vectoring of transmissions across the segment.

23. The DSL system of claim 21 wherein the first and second vector signal processing modules provide one-sided vectoring of transmissions across the segment.

24. The DSL system of claim 21 wherein the segment couples customer premises equipment to a pedestal.

25. The system of claim 21 wherein the segment couples a first pedestal to a second pedestal.

26. A method of providing high speed DSL service, the method comprising:

bonding K loops to provide a multiple loop segment having up to (2K−

1) communication channels; and

vectoring transmissions across the segment.

27. The method of claim 26 wherein the segment has a first end coupled to a first vectoring unit and a second end coupled to a second vectoring unit.

28. The method of claim 26 wherein vectoring transmissions across the segment comprises one-sided vectoring.

29. The method of claim 26 wherein vectoring transmissions across the segment comprises two-sided vectoring.

30. The method of claim 26 wherein the vectored transmissions across the segment utilize an expanded frequency spectrum on at least one channel.

31. The method of claim 26 wherein a controller provides vectoring control signals to the segment.

32. The method of claim 31 wherein the controller is a dynamic spectrum manager.

33. The method of claim 31 wherein the controller is a DSM center.

34. The method of claim 31 wherein the controller is a computer system.

35. The method of claim 26 further comprising providing impedance matching circuits at each end of the segment.

36. The method of claim 26 wherein bonding the loops comprises using one of the following bonding protocols:

TDIM bonding;

Ethernet bonding;

ATM bonding;

or

the G.bond protocol.