System and method for identifying errors in a video conference conducted on a packet-based network

• US 7,061,871 B2
• Filed: 08/30/2001
• Issued: 06/13/2006
• Est. Priority Date: 07/31/2001
• Status: Expired due to Fees

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Tandberg Telecom AS (Cisco Systems, Inc.)
• Inventors: Sheldon, Robert D., Maples, Benton B., Gott, Terri J.
• Primary Examiner(s): Kizou, Hassan
• Assistant Examiner(s): Patel, Jay P.
• Application Number:
  US09/943,631
• Publication Number:
  US 20030039216A1
• Time in Patent Office: 1,748 Days
• Field of Search: 370259-263, 379/201.01, 379/202.01, 379/204.01, 379/203.01, 379/207.01, 379/207.02, 379/207.03
• US Class Current: 370/242
• CPC Class Codes: H04L 12/1831 Tracking arrangements for later retrieval, e.g. recording contents, participants activities or behavior, network status
• CPC Class Codes: H04L 41/0213 Standardised network management protocols, e.g. simple network management protocol [SNMP]
• CPC Class Codes: H04L 41/046 comprising network management agents or mobile agents therefor
• CPC Class Codes: H04L 41/142 using statistical or mathematical methods
• CPC Class Codes: H04L 41/22 comprising specially adapted graphical user interfaces [GUI]
• CPC Class Codes: H04L 43/00 Arrangements for monitoring or testing data switching networks
• CPC Class Codes: H04L 43/0852 Delays
• CPC Class Codes: H04L 43/087 Jitter
• CPC Class Codes: H04L 43/0888 Throughput
• CPC Class Codes: H04L 43/106 using time related information in packets, e.g. by adding timestamps
• CPC Class Codes: H04L 43/16 Threshold monitoring
• CPC Class Codes: H04N 7/152 Multipoint control units therefor

Abstract

A system and method for identifying errors in a video conference conducted on a network are disclosed. A central device includes a central agent that detects an error during a video conference conducted on a network between two or more endpoints. The central agent distributes a capture agent via the network to a remote device associated with a collision domain that contains one of the two or more endpoints. The capture agent collects a plurality of media packets associated with the video conference in a capture file located in a storage medium associated with the remote device until a timer expires. When the timer expires, the capture agent communicates the capture file to the central agent at the central device.

Claims

1. A method for identifying errors in a video conference conducted on a packet-based network, comprising:

receiving a request to monitor the network during the video conference conducted between two or more endpoints;

distributing a capture agent over a network from a central agent at a central device to a remote device in response to the request, the remote device associated with a collision domain that contains one of the two or more endpoints and operable to execute the capture agent;

collecting a plurality of media packets associated with the video conference in a capture file until a timer expires, the capture file located in a storage medium interfaced with the remote device; and

communicating the capture file from the remote device to the central device when the timer expires.

2. The method of claim 1, further comprising analyzing the media packets at the central device to determine one or more network parameters that caused an error in the video conference.

3. The method of claim 2, further comprising the network parameters selected from the group consisting of latency, jitter, throughput, and packet loss.

4. The method of claim 1, wherein the timer expires at the end of the video conference.

5. The method of claim 1, further comprising the remote device located on a switch port associated with the collision domain, the switch port operable to monitor network traffic between the two or more endpoints within the collision domain.

6. The method of claim 1, further comprising:

distributing the agent from the central device to two or more remote devices respectively associated with the two or more endpoints, the two or more remote devices respectively located in two or more broadcast domains; and

storing the media packets in two or more storage mediums respectively interfaced with the two or more remote devices until the timer expires.

7. The method of claim 1, wherein the media packets comprise real time protocol (RTP) packets and real time control protocol (RTCP) packets.

8. The method of claim 1, wherein the network comprises an Internet Protocol (IP) network, an Asynchronous Transfer Mode (ATM) network or a Frame Relay network.

9. The method of claim 1, wherein the media packets comprise audio information.

10. The method of claim 1, wherein the media packets comprise video information.

11. The method of claim 1, wherein the media packets comprise data information.

12. The method of claim 1, wherein receiving the request comprises receiving notification of a potential error in the network through an alarm generated by the central agent.

13. The method of claim 1, wherein receiving the request comprises determining that a distribute timer has expired.

14. The method of claim 1, wherein receiving the request comprises initiating the distribution of the capture agent by a system administrator at the central device.

15. An apparatus for identifying errors in a video conference conducted on a packet-based network, comprising:

an interface operable to couple to the network;

a storage medium; and

a processing resource coupled to the storage medium and the interface, the processing resource operable to execute a capture agent received over the network from a central agent located at a central device and operable to;

collect a plurality of media packets associated with the video conference conducted on the network between two or more endpoints in response to a request to monitor the network, the request received by the central agent;

store the media packets in the storage medium until a timer expires; and

communicate the media packets to the central device via the interface when timer expires.

16. The apparatus of claim 15, further comprising the capture agent operable to analyze the media packets to determine one or more network parameters that caused an error during the video conference.

17. The apparatus of claim 16, further comprising the network parameters selected from the group consisting of latency, jitter, throughput, and packet loss.

18. The apparatus of claim 15, wherein the media packets comprise audio information.

19. The apparatus of claim 15, wherein the media packets comprise video information.

20. The apparatus of claim 15, wherein the media packets comprise data information.

21. The apparatus of claim 15, wherein the media packets comprise real time protocol (RTP) packets and real time control protocol (RTCP) packets.

22. The apparatus of claim 15, wherein the timer expires after a predetermined amount of time, the predetermined amount of time calculated by the central device.

23. The apparatus of claim 15, wherein the network comprises an Internet Protocol (IP) network, an Asynchronous Transfer Mode (ATM) network or a Frame Relay network.

24. The apparatus of claim 15, wherein the capture agent collects media packets in response to an alarm received by the central agent that indicates a potential error on the network.

25. A system for identifying errors in a video conference conducted on a packet-based network, comprising:

a first endpoint operable to couple to the network and conduct the video conference, the first endpoint located in a first collision domain;

a second endpoint operable to couple to the network and conduct the video conference, the second endpoint located in a second collision domain;

a central device operable to couple to the network and distribute over the network a capture agent to a first remote device associated with the first collision domain and a second remote device associated with the second collision domain in response to receiving a request to monitor the network during the video conference, each remote device operable to execute the capture agent, the capture agent operable to;

collect a plurality of media packets associated with the video conference;

store the media packets in a first storage medium interfaced with the first remote device and a second storage medium interfaced with the second remote device until a timer expires; and

communicate the media packets from the first and second storage mediums to the central device when the timer expires.

26. The system of claim 25, wherein the central device comprises a central agent operable to analyze the media packets at the central device to determine one or more network parameters that caused an error in the video conference.

27. The system of claim 26, further comprising the network parameters selected from the group consisting of latency, jitter, throughput, and packet loss.

28. The system of claim 26, further comprising the request received via an alarm generated by the central agent at the central device, the alarm indicating a potential error on the network.

29. The system of claim 25, wherein the media packets comprise real time protocol (RTP) packets and real time control protocol (RTCP) packets.

30. The system of claim 25, wherein the media packets comprise audio information.

31. The system of claim 25, wherein the media packets comprise video information.

32. The system of claim 25, wherein the media packets comprise data information.

33. The system of claim 25, further comprising the request received from a system administrator at the central device in response to a call from a user at either one of the first or second endpoints.

34. The system of claim 25, further comprising the request received when a distribute timer expires.

35. The system of claim 25, wherein the timer expires after the capture agent collects a predetermined number of media packets.

36. The system of claim 25, further comprising:

the first remote device located on a first switch port associated with the first collision domain, the first switch port operable to monitor network traffic between the two or more endpoints within the first collision domain; and

the second remote device located on a second switch port associated with the second collision domain, the second switch port operable to monitor network traffic between the two or more endpoints within the second collision domain.

37. A method for identifying errors in a video conference conducted on a packet-based network, comprising:

receiving a request to monitor the network during the video conference between two or more endpoints;

distributing a capture agent over the network from a central device to each of the two or more endpoints in response to the request, the capture agent operable to collect a plurality of media packets transmitted and received by the two or more endpoints during the video conference;

storing the media packets in storage mediums interfaced with each of the two or more endpoints until the end of video conference;

communicating the media packets from each of the storage mediums to the central device when the video conference ends; and

analyzing the media packets at the central device to determine one or more network parameters that caused the error.

38. The method of claim 37, further comprising the network parameters selected from the group consisting of latency, jitter, throughput, and packet loss.

39. The method of claim 37, wherein the media packets comprise real time protocol (RTP) packets and real time control protocol (RTCP) packets.

40. The method of claim 37, wherein the media packets comprise audio information.

41. The method of claim 37, wherein the media packets comprise video information.

42. The method of claim 37, wherein receiving the request comprises receiving notification of a potential error on the network through an alarm generated by a central agent located at the central device.

43. A system for identifying errors in a video conference conducted on a packet-based network, comprising:

means for receiving a request to monitor the network during the video conference conducted between two or more endpoints;

means for distributing a capture agent over a network from a central agent at a central device to a remote device in response to the request, the remote device associated with a collision domain that contains one of the two or more endpoints and operable to execute the capture agent;

means for collecting a plurality of media packets associated with the video conference in a capture file until a timer expires, the capture file located in a storage medium interfaced with the remote device; and

means for communicating the capture file from the remote device to the central device when the timer expires.