Apparatus, system, and method for providing energy management, profiles, and message blocks in a cable service environment

• US 9,237,084 B2
• Filed: 11/08/2013
• Issued: 01/12/2016
• Est. Priority Date: 11/09/2012
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Chapman, John T.
• Primary Examiner(s): Chery, Dady
• Application Number:
  US14/076,045
• Publication Number:
  US 20140133330A1
• Time in Patent Office: 795 Days
• Field of Search: 370203-210, 370/252
• US Class Current: 1/1
• CPC Class Codes: H03M 13/618 Shortening and extension of codes
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 27/12 Modulator circuits; Transmitter circuits
• CPC Class Codes: H04L 41/0806 for initial configuration or provisioning, e.g. plug-and-play
• CPC Class Codes: H04L 41/0816 the condition being an adaptation, e.g. in response to network events
• CPC Class Codes: H04L 41/0893 Assignment of logical groups to network elements
• CPC Class Codes: H04L 43/50 Testing arrangements
• CPC Class Codes: H04L 47/2483 involving identification of individual flows
• CPC Class Codes: H04L 69/323 in the physical layer [OSI layer 1]

Abstract

A method is provided in one example and includes creating a plurality of profiles that describe one or more downstream modulations for each data-subcarrier in a channel to be used by a plurality of cable modems; receiving at least one testing measurement from the plurality of cable modems; and assigning a selected one of the plurality of profiles to each of the plurality of cable modems based, at least in part, on the one testing measurement that was received.

Claims

1. A method, comprising:

creating a plurality of profiles that describe one or more downstream modulations for each data-subcarrier in a channel to be used by a plurality of cable modems, wherein each of the profiles includes a list of modulation orders for one or more subcarriers within an orthogonal frequency-division multiplexing (OFDM) channel, wherein the plurality of profiles are associated with the OFDM channel for a downstream path between a cable modem termination system (CMTS) and the plurality of cable modems;

receiving at least one testing measurement from the plurality of cable modems; and

assigning a selected one of the plurality of profiles to each of the plurality of cable modems based, at least in part, on the one testing measurement that was received.

2. The method of claim 1, further comprising:

executing an algorithm in order to sort the plurality of cable modems into a set of groups based on signal-to-noise ratio measurements received from each of the plurality of cable modems.

3. The method of claim 1, wherein the plurality of profiles are managed by a cable modem termination system (CMTS).

4. The method of claim 3, further comprising:

adjusting at least a portion of an orthogonal frequency-division multiplexing (OFDM) spectrum in a downstream path between the CMTS and the plurality of cable modems.

5. The method of claim 1, wherein packets to be propagated to the plurality of cable modems are placed into Forward Error Correction (FEC) codewords that have an associated one of the profiles.

6. The method of claim 1, wherein a CMTS is configured to assign a particular PHY Link Channel (PLC) to each OFDM channel in a downstream path between the CMTS and the plurality of cable modems.

7. The method of claim 1, wherein each of the plurality of cable modems belong to multiple groups such that multiple transmission paths exist for each of the plurality of cable modems.

8. The method of claim 1, wherein a CMTS defines the plurality of profiles for use in an OFDM channel for a downstream path between the CMTS and the plurality of cable modems.

9. The method of claim 8, wherein each OFDM channel in a downstream path between the CMTS and the plurality of cable modems has its own unique set of profiles.

10. The method of claim 1, wherein parameters that describe an OFDM downstream channel and each profile on that OFDM downstream channel are defined in OFDM Channel Descriptor (OCD) and Downstream Profile Descriptor (DPD) messages.

11. The method of claim 10, wherein a CMTS transmits the OCD message on the PLC.

12. The method of claim 1, wherein a number of profiles supported by a CMTS is based, at least in part, on a latency characteristic and an available bandwidth for a particular OFDM channel.

13. The method of claim 1, wherein at least one of the profiles is a common profile used by a majority of the plurality of the cable modems that can receive and decode data.

14. The method of claim 1, wherein at least one of the profiles is used for communicating multicast MAC Management Message (MMMs).

15. The method of claim 1, wherein a DPD is used by a CMTS to communicate parameters of the profiles to the plurality of cable modems.

16. The method of claim 1, wherein multicast sessions are propagated on a particular profile that is common to a multicast group associated with particular cable modems.

17. The method of claim 1, wherein a CMTS can indicate to a particular one of the plurality of cable modems to test a particular profile.

18. The method of claim 17, wherein results of the test for the particular one of the cable modems is subsequently reported back to the CMTS such that the CMTS adds the particular profile to the particular one of the plurality of cable modems.

19. Logic encoded in one or more non-transitory media that includes instructions for execution and when executed by a processor is operable to perform operations, comprising:

creating a plurality of profiles that describe one or more downstream modulations for each data-subcarrier in a channel to be used by a plurality of cable modems, wherein each of the profiles includes a list of modulation orders for one or more subcarriers within an orthogonal frequency-division multiplexing (OFDM) channel, wherein the plurality of profiles are associated with the OFDM channel for a downstream path between a cable modem termination system (CMTS) and the plurality of cable modems;

receiving at least one testing measurement from the plurality of cable modems; and

assigning a selected one of the plurality of profiles to each of the plurality of cable modems based, at least in part, on the one testing measurement that was received.

20. An apparatus, comprising:

a memory element configured to store instructions;

a processor coupled to the memory; and

a profile management module, wherein the profile management module is configured for;

segmenting a plurality of cable modems into a plurality of groups, wherein each of the plurality of cable modems belongs to multiple groups such that multiple transmission paths exist for each of the plurality of cable modems, wherein different profiles are associated with different groups, wherein each of the profiles includes a list of modulation orders for one or more subcarriers within an orthogonal frequency-division multiplexing (OFDM) channel, wherein the profiles are associated with the OFDM channel for a downstream path between a cable modem termination system (CMTS) and the plurality of cable modems;

identifying traffic being received or transmitted by each of the plurality of cable modems that is below a threshold; and

determining whether to move each of the plurality of cable modems into a low-power mode based, at least in part, on the traffic being received or transmitted by each of the plurality of cable modems.