Frequency band selection for multiple home networks

• US 9,923,652 B2
• Filed: 08/13/2012
• Issued: 03/20/2018
• Est. Priority Date: 08/12/2011
• Status: Active Grant

• Current Assignee: Entropic Communications, LLC (FIG LLC (d/b/a Fortress Investment Group LLC))
• Original Assignee: Entropic Communications, LLC (FIG LLC (d/b/a Fortress Investment Group LLC))
• Inventors: Lee, Ronald B., Warner, Edward, Liu, Changwen, Yuan, Shaw
• Primary Examiner(s): Chriss, Andrew
• Assistant Examiner(s): Ahmed, Atique
• Application Number:
  US13/584,541
• Publication Number:
  US 20130039221A1
• Time in Patent Office: 2,045 Days
• Field of Search: 370255, 370480, 370224, 370474, 4551611
• CPC Class Codes: H04H 20/63 to plural spots in a confined site, e.g. MATV [Master Antenna Television]

Abstract

A network-capable device is configured to: automatically detect the presence of a MoCA network (or other network, depending on the network protocol in the application environment), and configure itself for communication on that network at the appropriate communication frequencies. The network-capable device can be configured to create a new network (e.g., a new MoCA network) if there is no network broadcast signal within a band. Preferably, the network-capable device requires little or no user intervention to configure itself for operation at network operating frequencies or to create a new network where none is detected.

Claims

1. A method performed in a network device for self-configuring the network device for operation in a MoCA communication network, the method comprising, without user intervention and prior to the network device attempting to form its own communication network:

scanning a first plurality of communication channels in a first frequency band associated with cable TV signals and scanning a second plurality of communication channels in a second frequency band separate from the first frequency band and associated with satellite TV signals;

determining whether a signal detected in a first communication channel of the first and second pluralities of communication channels is a beacon of the communication network;

if the detected signal is a beacon of the communication network, then attempting to join the communication network on the first communication channel;

determining whether the detected signal is from a non-MoCA device; and

if the detected signal is from a non-MoCA device, then adding the first communication channel to a list of banned channels.

2. The method of claim 1, wherein said determining whether the detected signal is from a non-MoCA device comprises:

utilizing first determining criteria if the first communication channel is a channel of the first plurality of communication channels; and

utilizing second determining criteria, different from the first determining criteria, if the first communication channel is a channel of the second plurality of communication channels.

3. The method of claim 1, wherein the beacon comprises a MoCA beacon and further comprising updating the list of banned channels when the MoCA beacon is detected on the first communication channel.

4. The method of claim 1, comprising selectively entering a Beacon Phase in either of the first and second frequency bands to form a network.

5. The method of claim 1, wherein:

the first frequency band comprises at least the MoCA E Band of MoCA-1_1-Extentions-Band-E-v100714;

the second frequency band comprises at least the MoCA D Band of MoCA MAC/PHY SPECIFICATION v1.0; and

the first and second pluralities of communication channels scanned comprise the union of the channels of said E Band and said D Band.

6. The method of claim 1, wherein the first and second pluralities of communication channels are scanned one at a time in a successive order, and wherein a last operating frequency is scanned between scanning of every M of the communication channels, where M is an integer value and less than a total number of channels scanned, such that the last operating frequency is scanned more frequently than the other communication channels of the first and second pluralities of communication channels.

7. The method of claim 1, wherein the first and second pluralities of communication channels are scanned one at a time, and wherein:

if a last operating frequency of the network device is in the first frequency band, then all of the channels of the first frequency band are scanned once before any of the channels of the second frequency band; and

if the last operating frequency of the network device is in the second frequency band, then all of the channels of the second frequency band are scanned once before any of the channels of the first frequency band.

8. The method of claim 6, wherein M is in the range 3-6.

9. The method of claim 1, comprising

if the detected signal is detected in a channel of the first frequency band, then analyzing signal strength in only the channel of the first frequency band;

and

if the detected signal is detected in a channel of the second frequency band, then analyzing signal strength in at least a portion of the channel of the second frequency band and in at least a portion of another channel adjacent to the channel of the second frequency band.

10. The method of claim 1, comprising:

if the detected signal is detected in a channel of the first frequency band, then comparing signal strength to a first threshold to determine whether the detected signal is strong enough to qualify as a detected signal; and

if the detected signal is detected in a channel of the second frequency band, then comparing signal strength to a second threshold, lower than the first threshold, to determine whether the detected signal is strong enough to qualify as a detected signal.

11. The method of claim 1, wherein:

in the first frequency band, a −

58 dBm signal is determined to be a detected signal, and a −

68 dBm signal is determined to be a false detection; and

in the second frequency band, a −

69 dBm signal is determined to be a detected signal, and a signal of −

80 dBm signal is determined to be a false detection.

20. The method of claim 1, wherein said scanning comprises alternating between a last operating frequency and successive channels in the first and second frequency bands.

22. The method of claim 1, comprising if the detected signal is from a non-MoCA device and the first communication channel is in the second frequency band that is associated with satellite TV signals, then adding all channels in the second frequency band to the list of banned channels.

24. The method of claim 22, comprising if the detected signal is from a non-MoCA device and the first communication channel is in the first frequency band that is associated with cable TV signals, then only adding the first communication channel to the list of banned channels.

12. A self-configuring network device for operation in a MoCA communication network, the network device comprising:

a processor; and

a memory communicatively coupled to the processor and storing program instructions that when executed by the processor, cause the network device, without user intervention and prior to the network device attempting to form its own communication network, to at least;

scan a first plurality of communication channels in a first frequency band associated with cable TV signals and scan a second plurality of communication channels in a second frequency band separate from the first frequency band and associated with satellite TV signals;

determine whether a signal detected in a first communication channel of the first and second pluralities of communication channels is a beacon of the communication network;

if the detected signal is a beacon of the communication network, then attempt to join the communication network on the first communication channel;

determine whether the detected signal is from a non-MoCA device; and

if the detected signal is from a non-MoCA device then add the first communication channel to a list of banned channels.

13. The network device of claim 12, wherein the processor comprises a general purpose processor and a digital signal processor.

14. The network device of claim 12, wherein the network device determines whether the detected signal is from a non-MoCA device by, at least in part:

utilizing first determining criteria if the first communication channel is a channel of the first plurality of communication channels; and

utilizing second determining criteria, different from the first determining criteria, if the first communication channel is a channel of the second plurality of communication channels.

15. The network device of claim 12, wherein the beacon comprises a MoCA beacon and the network device updates the list of banned channels when the MoCA beacon is detected on the first communication channel.

16. The network device of claim 12, wherein the program instructions further include program instructions configured to cause the network device to selectively enter a Beacon Phase in either of the first and second of frequency bands to form a network.

17. The network device of claim 12, wherein:

the first frequency band comprises at least the MoCA E Band of MoCA-1_1-Extentions-Band-E-v100714;

the second frequency band comprises at least the MoCA D Band of MoCA MAC/PHY SPECIFICATION v1.0; and

the first and second pluralities of communication channels scanned comprise the union of the channels of said E Band and said D Band.

18. The network device of claim 12, wherein the first and second pluralities of communication channels are scanned one at a time in successive order and wherein a last operating frequency is scanned between scanning of every M of the communication channels, where M is an integer value and less than a total number of channels scanned, such that the last operating frequency is scanned more frequently than the other communication channels of the first and second pluralities of communication channels.

19. The network device of claim 12, wherein the first and second pluralities of communication channels are scanned one at a time, and wherein:

if a last operating frequency of the network device is in the first frequency band, then all of the channels of the first frequency band are scanned once before any of the channels of the second frequency band; and

if a last operating frequency of the network device is in the second frequency band, then all of the channels of the second frequency band are scanned once before any of the channels of the first frequency band.

21. The network device of claim 12, wherein the network device scans the first and second pluralities of communication channels by, at least in part, alternating between a last operating frequency and successive channels in the first and second frequency bands.

23. The network device of claim 12, wherein the program instructions further comprise program instructions configured to cause the network device to, if the detected signal is from a non-MoCA device and the first communication channel is in the second frequency band associated with satellite TV signals, then add all channels in the second frequency band to the list of banned channels.

25. The network device of claim 23, wherein the program instructions further comprise program instructions configured to cause the network device to, if the detected signal is from a non-MoCA device and the first communication channel is in the first frequency band that is associated with cable TV signals, then only add the first communication channel to the list of banned channels.