Method and system for interference detection and mitigation

• US 8,683,256 B2
• Filed: 06/24/2010
• Issued: 03/25/2014
• Est. Priority Date: 06/24/2010
• Status: Active Grant

• Current Assignee: MaxLinear Communications, LLC (f/k/a Entropic Communications, LLC) (Maxlinear Incorporated)
• Original Assignee: Entropic Communications Incorporated (Maxlinear Incorporated)
• Inventors: Jogadhenu, Saga
• Primary Examiner(s): TRUONG, LOAN
• Application Number:
  US12/822,578
• Publication Number:
  US 20110320859A1
• Time in Patent Office: 1,370 Days
• Field of Search: 714/4.1, 714/5.11, 714/27, 714/47.1
• US Class Current: 714/4.1
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/1607 Details of the supervisory signal
• CPC Class Codes: H04L 27/0008 arrangements for allowing a transmitter or receiver to use more than one type of modulation negotiating modulation type for two-way transmission paths H04L5/1453
• CPC Class Codes: H04L 27/183 Multiresolution systems
• CPC Class Codes: H04L 27/3488 Multiresolution systems
• CPC Class Codes: H04L 41/0661 by reconfiguring faulty entities
• CPC Class Codes: H04L 5/0044 allocation of payload

Abstract

In a method for adjusting modulation on a network, a modulation profile of a network node on the network is set a specified density. A plurality of messages that are received at the network node are monitored on an ongoing basis. The modulation profile of the network node is updated continually based on the monitored messages. A determination is made that a predetermined class of messages is received incorrectly at the network node. The network node is disconnected from the network based on the incorrectly received predetermined class of messages and is reconnected to the network to initiate the network node on the network.

Claims

1. A method for adjusting modulation on a network, the method comprising:

setting a first modulation profile of a network node on the network at a first density;

monitoring a plurality of messages received at the network node;

updating the first modulation profile of the network node based on the monitored messages;

determining that a predetermined class of messages is received by the network node at an error rate that is greater than a predetermined error rate;

disconnecting the network node from the network based on the error rate of the received predetermined class of messages; and

reconnecting the network node to the network to re-initiate the network node on the network.

2. The method of claim 1, wherein updating the first modulation profile includes updating the first modulation profile to a second density higher than the first density.

3. The method of claim 2, wherein reconnecting the network node to initiate the network node on the network includes reconnecting the network node with a second modulation profile having a third density less than the second density.

4. The method of claim 3, wherein the third density equals the first density.

5. The method of claim 1, wherein the predetermined class of messages comprises modulation reports.

6. The method of claim 1, wherein determining that the specified class of messages is being received incorrectly includes detecting that a predetermined number of messages of the specified class is not received in a predetermined time interval.

7. The method of claim 6, wherein the predetermined number is four and the predetermined time interval is about ten seconds.

8. The method of claim 1, wherein determining that a predetermined class of messages is being received incorrectly includes determining that dynamic interference is causing the predetermined class of messages to be received incorrectly.

9. A network node comprising:

a receiver that receives a plurality of messages;

a processor coupled to the receiver, the processor programmed to;

set a first modulation profile of the network node at a first density;

monitor the received messages on an ongoing basis;

update the first modulation profile of the network node continually based on the monitored messages;

determine that a predetermined class of messages is received incorrectly at the network node;

disconnect the network node from the network based on the incorrectly received predetermined class of messages; and

reconnect the network node to the network to initiate the network node on the network; and

a transmitter coupled to the processor, the transmitter transmitting data during initiation of the network node on the network.

10. The network node of claim 9, wherein the processor programmed to update the first modulation profile to a second density higher than the first density.

11. The network node of claim 10, wherein the processor programmed to reconnect the network node to initiate the network node on the network with a second modulation profile having a third density less than the second density.

12. The network node of claim 9, wherein the predetermined class of messages comprises modulation reports.

13. The network node of claim 9, wherein determining that the specified class of messages is being received incorrectly includes detecting that a predetermined number of messages of the specified class is not received in a predetermined time interval.

14. A network controller comprising:

a receiver that receives messages in support of a link maintenance operation (LMO) on a network;

a processor coupled to the receiver, the processor programmed to;

monitor the messages on an ongoing basis;

determine that a predetermined class of messages is not received correctly;

disconnect an LMO network node from the network based on the incorrectly received predetermined class of messages; and

reconnect the LMO network node to the network to initiate the LMO network node on the network; and

a transmitter coupled to the processor, the transmitter transmitting the messages in support of the LMO on the network.

15. A non-transitory computer readable storage medium having instructions stored thereon, the instructions when executed by a processor causing the processor to perform the operations of:

setting a first modulation profile of a network node on the network at a first density;

monitoring, on an ongoing basis, a plurality of messages received at the network node;

updating a first modulation profile of the network node continually based on the monitored messages;

determining that a predetermined class of messages is received incorrectly at the network node;

disconnecting the network node from the network based on the incorrectly received messages; and

reconnecting the network node to the network to initiate the network node on the network.

16. The non-transitory computer readable storage medium of claim 15, wherein updating the first modulation profile includes updating the first modulation profile to a second density higher than the first density.

17. The non-transitory computer readable storage medium of claim 16, wherein reconnecting the network node to initiate the network node on the network includes reconnecting the network node with a second modulation profile having a third density less than the second density.

18. The non-transitory computer readable storage medium of claim 15, wherein the predetermined class of messages comprises modulation reports.

19. The non-transitory computer readable storage medium of claim 15, wherein determining that the specified class of messages is being received incorrectly includes detecting that a predetermined number of messages of the specified class is not received in a predetermined time interval.

20. The non-transitory computer readable storage medium of claim 15, wherein determining that a predetermined class of messages is being received incorrectly includes determining that dynamic interference is causing the predetermined class of messages to be received incorrectly.