Monitoring network traffic

• US 8,000,288 B2
• Filed: 03/22/2010
• Issued: 08/16/2011
• Est. Priority Date: 06/07/2002
• Status: Active Grant

• Current Assignee: Silicon Laboratories Incorporated
• Original Assignee: Ember Corporation
• Inventors: Wheeler, Andrew James, Avey, Jonathan Everett, Seward, Dewitt Clinton IV
• Primary Examiner(s): Phillips; Hassan
• Assistant Examiner(s): Duong; Duc T
• Application Number:
  US12/728,815
• Publication Number:
  US 20100172265A1
• Time in Patent Office: 512 Days
• Field of Search: 370/252, 370/328, 370/338, 370/400, 370/401, 709/223, 709/224
• US Class Current: 370/328
• CPC Class Codes: G01R 31/08 Locating faults in cables, transmission lines, or networks
• CPC Class Codes: G06F 11/00 Error detection; Error correction; Monitoring error detection, correction or monitoring in information storage based on relative movement between record carrier and transducer G11B20/18; monitoring, i.e. supervising the progress of recording or reproducing G11B27/36; in static stores G11C29/00
• CPC Class Codes: G08C 15/00 Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path
• CPC Class Codes: H04J 1/16 Monitoring arrangements for transmission in general H04B17/00; for amplifiers H03F1/52, H03F1/523
• CPC Class Codes: H04J 3/14 Monitoring arrangements for SDH/SONET rings H04J3/085
• CPC Class Codes: H04L 1/16 in which the return channel carries supervisory signals, e.g. repetition request signals
• CPC Class Codes: H04L 1/1838 for semi-reliable protocols, e.g. for less sensitive applications such as streaming video buffer level management for video bitstream receiver H04N21/44004
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/20 using signal quality detector
• CPC Class Codes: H04L 2001/0096 Channel splitting in point-to-point links
• CPC Class Codes: H04L 43/00 Arrangements for monitoring or testing data switching networks
• CPC Class Codes: H04L 43/062 related to network traffic
• CPC Class Codes: H04L 45/00 Routing or path finding of packets in data switching networks routing or path finding in wireless networks H04W40/00
• CPC Class Codes: H04L 47/32 by discarding or delaying data units, e.g. packets or frames
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 28/14 using intermediate storage
• CPC Class Codes: H04W 40/02 Communication route or path selection, e.g. power-based or shortest path routing
• CPC Class Codes: H04W 40/04 based on wireless node resources
• CPC Class Codes: H04W 40/12 based on transmission quality or channel quality
• CPC Class Codes: H04W 40/248 : Connectivity information update
• CPC Class Codes: H04W 40/26 : for hybrid routing by combining proactive and reactive routing
• CPC Class Codes: H04W 40/28 : for reactive routing
• CPC Class Codes: H04W 40/30 : for proactive routing
• CPC Class Codes: H04W 8/04 : Registration at HLR or HSS [Home Subscriber Server]
• CPC Class Codes: H04W 84/18 : Self-organising networks, e.g. ad-hoc networks or sensor networks
• CPC Class Codes: H04W 88/04 : adapted for relaying to or from another terminal or user

Abstract

A method for monitoring a wireless network includes, at a device including a communication interface coupling the device to a wireless network, monitoring messages transmitted between the communication interface and the wireless network, and outputting monitoring data associated with the monitored messages from the device.

Claims

1. A method of monitoring network traffic at a device, comprising:

Providing a device having a communication interface coupling the device to a wireless network, wherein the device is configured to wirelessly receive messages from at least one first node and wirelessly re-transmit said messages to at least one second node;

monitoring radio messages transmitted between the communication interface of the device and the wireless network; and

outputting monitoring data associated with the monitored messages from the device via a second network, dedicated for monitoring and testing said wireless network.

2. The method of claim 1, wherein the messages comprise frames formatted according to a medium access control layer format.

3. The method of claim 1, wherein the communication interface performs data link layer functions.

4. The method of claim 3, wherein the communication interface performs medium access control layer functions.

5. The method of claim 1, wherein said second network comprises a wired network.

6. The method of claim 1, wherein the monitoring data comprises a copy of a transmitted or received frame.

7. The method of claim 1, wherein the monitoring data comprises a copy of a failed received frame.

8. The method of claim 1, wherein the monitoring data comprises at least one of the group consisting of:

a time-stamp;

a received signal strength indicator;

a link quality indicator; and

a receiver gain.

9. The method of claim 1, wherein said messages include a destination node and said destination node is different than said device.

10. An apparatus comprising:

a communication interface for coupling to a wireless network, said communication interface configured to wirelessly receive messages from at least one first node and wirelessly re-transmit said messages to at least one second node

a backchannel module coupled to the communication interface and configured to monitor radio messages transmitted between the communication interface and the wireless network; and

an output port for outputting monitoring data associated with the monitored messages from the backchannel module via a second network, dedicated for monitoring and testing said wireless network.

11. The apparatus of claim 10, wherein the messages comprise frames formatted according to a medium access control layer format.

12. The apparatus of claim 10, wherein the communication interface performs data link layer functions.

13. The apparatus of claim 10, wherein the communication interface is configured to perform medium access control layer functions.

14. The apparatus of claim 10, wherein said second network comprises a wired network.

15. The apparatus of claim 10, wherein said messages include a destination node and said destination node is different than said device.

16. A method of monitoring the progress of a packet traversing a wireless network, wherein the wireless network comprises a plurality of nodes, each node having a radio transceiver for transmitting and receiving radio messages and configured to wirelessly receive a packet from at least one first node and wirelessly re-transmit the packet to at least one second node, comprising:

transmitting and receiving radio messages at nodes of a wireless network;

linking the nodes using a wired network;

generating monitoring data associated with the packet at the nodes; and

collecting the monitoring data from the nodes over said wired network.

17. The method of claim 16, wherein the monitoring data comprises a copy of a transmitted or received frame.

18. The method of claim 16, wherein the monitoring data comprises at least one of the group consisting of:

a time-stamp;

a received signal strength indicator;

a link quality indicator; and

a receiver gain.

19. The method of claim 16, wherein said packet includes a destination node and said destination node is different than said device.

20. A system for monitoring the progress of a packet traversing a wireless network comprising:

a plurality of nodes each having a radio transceiver for transmitting and receiving radio messages and configured to wirelessly receive a packet from at least one first node and wirelessly re-transmit the packet to at least one second node;

a wired communications medium linking the nodes; and

a monitoring station coupled to the wired communications medium;

wherein the monitoring station is configured to receive monitoring data associated with the packet from the nodes over the wired communications medium.

21. The system of claim 20, wherein the monitoring data comprises a copy of a transmitted or received frame.

22. The system of claim 20, wherein the monitoring data comprises at least one of the group consisting of:

a time-stamp;

a received signal strength indicator;

a link quality indicator; and

a receiver gain.

23. The system of claim 20, wherein said packet includes a destination node and said destination node is different than said device.

24. A system for viewing wireless network activity, comprising:

a display device;

a plurality of nodes, each having a communication interface coupling the device to said wireless network, and a backchannel module coupled to said communication interface and configured to transmit a copy of messages transmitted between said communication interface and said wireless network via a wired network;

and

a monitoring station connected to said wired network, configured to process information gathered over said wired network from said plurality of nodes, and graphically display said processed information on said display device.

25. The system of claim 24, wherein said monitoring station graphically displays said network topology.

26. The system of claim 25, wherein said monitoring station graphically displays a packet having a particular sequence number traversing said network topology.

27. The system of claim 25, wherein said monitoring station graphically displays the flow of information in said network topology during a selected time period.

28. The system of claim 27, wherein a user selects said time period.

29. The system of claim 27, wherein said monitoring station graphically displays the flow at a selected layer.

30. The system of claim 25, wherein said information can be categorized into different types of events, and said monitoring station graphically displays all information of a particular type of event.

31. The system of claim 30, wherein a user selects said type of event to display.