Spectrum analysis capability in network and/or system communication devices

• US 20130286855A1
• Filed: 06/28/2013
• Published: 10/31/2013
• Est. Priority Date: 03/25/2011
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Currivan, Bruce J., Fish, Roger, Kolze, Thomas J., Whitehead, Harold Raymond
• Granted Patent: US 8,897,147 B2
• Time in Patent Office: Days
• US Class Current: 370/242
• CPC Class Codes: H04L 1/20 using signal quality detector
• CPC Class Codes: H04L 2025/03414 Multicarrier
• CPC Class Codes: H04L 25/022 of frequency response
• CPC Class Codes: H04L 25/0222 Estimation of channel variability, e.g. coherence bandwidth, coherence time, fading frequency
• CPC Class Codes: H04L 25/03006 Arrangements for removing intersymbol interference
• CPC Class Codes: H04L 43/50 Testing arrangements

Abstract

Spectrum analysis (SA) capability is included in various communication devices within a communication network. One or more of the devices use the SA information from other devices in the system to determine status of various communication links were devices in the system. One or more processors within one or more devices can identify any actual/existing or expected failure or degradation of the various components within the system. Such components may include communication devices, communication channels or links, interfaces, interconnections, etc. When an actual/existing or expected failure or degradation is identified, the affected components may be serviced or devices within the system may operate to mitigate any reduction in performance caused by such problems. Such SA functionality/capability may be implemented in one communication device or in a distributed manner across a number of devices in a communication system.

Claims

1. A communication device comprising:

a processor configured to generate spectrum analysis (SA) information based on one or more communication channels within a communication system, wherein at least some of the SA information is based on full bandwidth of a usable frequency spectrum in the communication system; and

a communication interface configured to transmit the SA information to at least one other communication device within the communication system for use in determining one or more characteristics associated with performance of the one or more communication channels in the communication system and for identifying, based on the one or more characteristics, a degradation of communication associated with the one or more communication channels.

2. The communication device of claim 1, wherein the SA information that includes information associated with a frequency response of the one or more communication channels;

and

the frequency response being used to identify an existing failure or degradation of communication associated with the one or more communication channels.

3. The communication device of claim 1, wherein the communication interface is further configured to transmit first SA information to at least one other communication device that includes information associated with a first frequency response of the one or more communication channels and to transmit first SA information to at least one other communication device that includes information associated with a second frequency response of the one or more communication channels;

the first frequency response and the second frequency response being used to determine an operational trend of the one or more communication channels; and

the operational trend being used to identify an expected degradation of communication associated with the one or more communication channels.

4. The communication device of claim 1, wherein the communication system is a cable based communication system that includes a cable modem termination system (CMTS) and one or more cable modems (CMs);

and

the full bandwidth of the usable frequency spectrum in the communication system extends from approximately 54 mega-Hertz (MHz) to 1008 MHz.

5. The communication device of claim 1, wherein the one or more characteristics associated with performance of one or more communication channels in the communication system corresponds, at least in part, to at least one of an internal frequency response of the communication device or the at least one other communication device, a frequency response of the one or more communication channels, interference or noise detected on the one or more communication channels, a reflection detected on the one or more communication channels, and a frequency null detected on the one or more communication channels.

6. The communication device of claim 1, wherein the communication interface is further configured to:

receive at least one additional signal, that includes a plurality of pilot tones, from the at least one other communication device; and

transmit the SA information to the least one other communication device that is based on characterization of the plurality of pilot tones received by the communication device.

7. The communication device of claim 1, wherein the processor is further configured to:

determine first SA information of a first frequency sub-band of the one or more communication channels;

determine second SA information of a second frequency sub-band of the one or more communication channels; and

employ the first SA information and the second SA information to generate the SA information that is based on the full bandwidth of the usable frequency spectrum in the communication system.

8. The communication device of claim 1, wherein the communication interface is further configured to receive at least one additional signal, including information associated with the degradation of communication associated with the one or more communication channels, from the at least one other communication device.

9. A communication device comprising:

a communication interface configured to;

transmit a first request to a first other communication device for first spectrum analysis (SA) information;

transmit a second request to a second other communication device for second SA information; and

receive the first SA information and the second SA information, wherein at least one of the first SA information and the second SA information is based on full bandwidth of a usable frequency spectrum in the communication system; and

a processor configured to process the first SA information and the second SA information to;

determine a first characteristic associated with performance of a first communication channel in the communication system and a second characteristic associated with performance of a second communication channel in the communication system; and

identify an existing or expected degradation of communication associated with the at least one of the first communication channel and the second communication channel based on at least one of the first characteristic and the second first characteristic.

10. The communication device of claim 9, wherein the processor is further configured to:

determine a frequency response of at least one of the first communication channel and the second communication channel based on at least one of the first SA information and the second SA information; and

identify, based on the frequency response, an existing failure or degradation of communication associated with at least one of the first communication channel and the second communication channel.

11. The communication device of claim 9, wherein the processor is further configured to:

determine a frequency response of at least one of the first communication channel and the second communication channel based on at least one of the first SA information and the second SA information;

employ the frequency response to determine an operational trend of at least one of the first communication channel and the second communication channel; and

employ the operational trend to identify an expected failure or degradation of communication associated with at least one of the first communication channel and the second communication channel.

12. The communication device of claim 9, further comprising:

the communication device includes a cable modem termination system (CMTS);

the first other communication device includes a first cable modem (CM); and

the second other communication device includes a second CM; and

wherein the full bandwidth of the usable frequency spectrum in the communication system extends from approximately 54 mega-Hertz (MHz) to 1008 MHz.

13. The communication device of claim 9, wherein the first characteristic corresponds, at least in part, to at least one of an internal frequency response of the first other communication device, a frequency response of the first communication channel, interference or noise detected on the first communication channel, a reflection detected on the first communication channel, and a frequency null detected on the first communication channel.

14. A method for execution by a communication device, the method comprising:

generating spectrum analysis (SA) information based on one or more communication channels within a communication system, wherein at least some of the SA information is based on full bandwidth of a usable frequency spectrum in the communication system; and

via a communication interface of the communication device, transmitting the SA information to at least one other communication device within the communication system for use in determining one or more characteristics associated with performance of the one or more communication channels in the communication system and for identifying, based on the one or more characteristics, a degradation of communication associated with the one or more communication channels.

15. The method of claim 14, further comprising:

determining a frequency response of the one or more communication channels based on the SA information; and

identifying, based on the frequency response, an existing failure or degradation of communication associated with the one or more communication channels.

16. The method of claim 14, further comprising:

determining a first frequency response of the one or more communication channels based on first SA information;

determining a second frequency response of the one or more communication channels based on second SA information;

employing the first frequency response and the second frequency response to determine an operational trend of the one or more communication channels; and

employing the operational trend to identify an expected degradation of communication associated with the one or more communication channels.

17. The method of claim 14, wherein the communication system is a cable based communication system that includes a cable modem termination system (CMTS) and one or more cable modems (CMs);

and

the full bandwidth of the usable frequency spectrum in the communication system extends from approximately 54 mega-Hertz (MHz) to 1008 MHz.

18. The method of claim 14, wherein the one or more characteristics associated with performance of one or more communication channels in the communication system corresponds, at least in part, to at least one of an internal frequency response of the communication device or the at least one other communication device, a frequency response of the one or more communication channels, interference or noise detected on the one or more communication channels, a reflection detected on the one or more communication channels, and a frequency null detected on the one or more communication channels.

19. The method of claim 14, further comprising, via the communication interface of the communication device:

receiving at least one additional signal, that includes a plurality of pilot tones, from the at least one other communication device; and

transmitting the SA information to the least one other communication device that is based on characterization of the plurality of pilot tones received by the communication device.

20. The method of claim 14, further comprising:

determining first SA information of a first frequency sub-band of the one or more communication channels;

determining second SA information of a second frequency sub-band of the one or more communication channels; and

employing the first SA information and the second SA information to generate the SA information that is based on the full bandwidth of the usable frequency spectrum in the communication system.