Channel assessment in an information network

• US 9,531,619 B2
• Filed: 12/10/2013
• Issued: 12/27/2016
• Est. Priority Date: 04/07/2009
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Kliger, Avi, Klein, Philippe, Ohana, Yitshak
• Primary Examiner(s): Yao, Kwang B
• Assistant Examiner(s): DUDA, ADAM K
• Application Number:
  US14/102,390
• Publication Number:
  US 20140146698A1
• Time in Patent Office: 1,113 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04L 12/2801 Broadband local area networks
• CPC Class Codes: H04L 12/2838 Distribution of signals within a home automation network, e.g. involving splitting/multiplexing signals to/from different paths adaptations of television systems for transmission by electric cable for domestic distribution H04N7/106; hybrid transport H04L12/6418; home network arrangements specially adapted for distribution of digital video signals H04N7/24
• CPC Class Codes: H04L 43/12 Network monitoring probes
• CPC Class Codes: H04L 43/50 Testing arrangements

Abstract

A method for assessing channel performance in a network is provided. The network includes a network controller and nodes. The method preferably includes selecting a channel for assessment and allocating a first probe operation for use with the nodes. The method may also include, in response to the allocating, sending a first probe operation report message from each of the nodes to the network controller. The method may further include using the network controller to select a node to be a channel assessment operation node. In addition, the method may include selecting at least a portion of the nodes to participate in a channel assessment operation signal exchange. The method may also include moving the selected nodes to a different channel to perform a channel assessment operation on the different channel and using the channel assessment operation node to allocate a second probe operation on each of the selected nodes.

Claims

1. A method for coordinating alternate channel assessment on a network comprising a plurality of nodes, the method comprising:

identifying an alternate channel for assessment, an assessment transmission node of the plurality of nodes to participate in the assessment by transmitting a probe message on the alternate channel, and at least one assessment node of the plurality of nodes to participate in the assessment by receiving the probe message on the alternate channel, wherein the assessment transmission node is distinct from the at least one assessment node;

scheduling, over a current channel, the assessment of the alternate channel exclusively by the assessment transmission node and the at least one assessment node;

transmitting, to the at least one assessment node over the current channel and subsequent to the scheduling, a probe report request in relation to the assessment of the alternate channel, wherein the probe report request comprises a first field that identifies the assessment transmission node; and

receiving, from the at least one assessment node over the current channel, at least one probe report that comprises at least one result of the assessment of the alternate channel.

2. The method of claim 1, wherein the scheduling, over the current channel, the assessment of the alternate channel by the assessment transmission node and the at least one assessment node further comprises:

transmitting, to the plurality of nodes over the current channel, a message that comprises second fields that are indicative of the alternate channel, the assessment transmission node, and the at least one assessment node.

3. The method of claim 2, wherein the identifying, the transmitting the message, the transmitting the probe report request and the receiving, are performed by a network coordinator that is distinct from the assessment transmission node and the at least one assessment node.

4. The method of claim 3, further comprising:

receiving, by the network coordinator, a request to initiate the assessment of the alternate channel.

5. The method of claim 4, wherein the request to initiate the assessment of the alternate channel is triggered by an application external to the network coordinator and the plurality of nodes, and the method further comprises:

providing, by the network coordinator, the at least one probe report that comprises the at least one result of the assessment of the alternate channel.

6. The method of claim 2, wherein the at least one assessment node is identified in the message by a bit mask.

7. The method of claim 1, wherein the at least one result of the at least one probe report comprises performance information corresponding to a plurality of subcarriers of the alternate channel.

8. The method of claim 1, wherein the current channel is distinct from the alternate channel.

9. The method of claim 1, wherein a communication medium of the network comprises a coaxial cable.

10. A node communicating over a network comprising a plurality of nodes, the node comprising:

a processor; and

a memory including instructions that, when executed by the processor, causes the processor to;

identify an alternate channel for assessment, an assessment transmission node of the plurality of nodes to participate in the assessment by transmitting a probe message on the alternate channel, and at least one assessment node of the plurality of nodes to participate in the assessment by receiving the probe message on the alternate channel, wherein the assessment transmission node is distinct from the at least one assessment node;

transmit, to the plurality of nodes over a current channel, a message that comprises first fields that are indicative of the alternate channel, the assessment transmission node, and the at least one assessment node;

transmit, to the at least one assessment node over the current channel and subsequent to transmitting the message, a probe report request in relation to the assessment of the alternate channel, wherein the probe report request comprises a second field that identifies the assessment transmission node; and

receive, from the at least one assessment node over the current channel, at least one probe report that comprises at least one result of the assessment of the alternate channel.

11. The node of claim 10, wherein a communication medium of the network comprises a coaxial cable.

12. The node of claim 10, wherein the node comprises a network coordinator that is distinct from the assessment transmission node and the at least one assessment node.

13. The node of claim 10, wherein the at least one assessment node is identified in the message by a bit mask.

14. The node of claim 10, wherein the current channel comprises a different frequency than the alternate channel.

15. The node of claim 10, wherein the at least one result of the at least one probe report comprises performance information corresponding to a plurality of subcarriers of the alternate channel.

16. A computer program product comprising instructions stored in a non-transitory computer-readable storage medium, the instructions comprising:

instructions to determine an alternate channel for assessment, an assessment transmission node of a plurality of nodes of a network to participate in the assessment by transmitting a probe message on the alternate channel, and at least one assessment node of the plurality of nodes to participate in the assessment by receiving the probe message on the alternate channel, wherein the assessment transmission node is distinct from the at least one assessment node;

instructions to transmit, to the plurality of nodes over a current channel and prior to the assessment of the alternate channel, a message that comprises first fields that identify the determined alternate channel, the determined assessment transmission node, and the determined at least one assessment node;

instructions to transmit, to the at least one assessment node over the current channel and subsequent to transmitting the message, a probe report request in relation to the assessment of the alternate channel, wherein the probe report request comprises a second field that identifies the assessment transmission node; and

instructions to receive, from the at least one assessment node over the current channel, a probe report that comprises at least one result of the assessment of the alternate channel.

17. The computer program product of claim 16, wherein the at least one assessment node is identified in the message by a bit mask.

18. The computer program product of claim 16, wherein the current channel is distinct from the alternate channel.

19. The computer program product of claim 16, wherein the at least one result of the at least one probe report comprises performance information corresponding to a plurality of subcarriers of the alternate channel.

20. The computer program product of claim 16, the instructions further comprising:

instructions for receiving a request to initiate the assessment of the alternate channel; and

instructions for providing the at least one probe report that comprises the at least one result of the assessment of the alternate channel.