Method and apparatus for media stream monitoring

• US 7,310,334 B1
• Filed: 04/30/2002
• Issued: 12/18/2007
• Est. Priority Date: 04/30/2002
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: FitzGerald, Cary, Jennings, Cullen
• Primary Examiner(s): Patel, Ajit
• Application Number:
  US10/137,545
• Time in Patent Office: 2,058 Days
• Field of Search: 370/259, 370/260, 370352-356, 370/389, 370/401
• US Class Current: 370/389
• CPC Class Codes: H04L 43/087 Jitter
• CPC Class Codes: H04L 43/106 using time related information in packets, e.g. by adding timestamps
• CPC Class Codes: H04L 65/1043 Gateway controllers, e.g. media gateway control protocol [MGCP] controllers
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/65 Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
• CPC Class Codes: H04L 65/80 Responding to QoS

Abstract

A network processing device is signaled to establish a media path with another network processing device in a packet switched network with Session Initiated Protocol (SIP), International Telecommunication Union (ITU) standard H.323, MGCP, Megaco, or some other signaling protocol. The network processing device receives a request to send information to an observer device that is not directly in the media path. The network processing device then sends information about the media path to the observer device.

Claims

1. A method for monitoring a media path in a network, comprising:

receiving, at a media endpoint, a request to send information to an observer device that is not in the media path from a device other than the observer device, the request identifying a location of the observer device; and

sending information about the media path from the media endpoint in the media path to the observer device not in the media path.

2. A method according to claim 1 including receiving the request in signaling used for establishing the media path.

3. A method according to claim 2 including receiving the request over a packet based media path protocol.

4. A method according to claim 3 including receiving the request over a signaling protocol for Real Time Transfer Protocol (RTP) and the information is sent to the observer device using a Real Time Control Protocol.

5. A method according to claim 1 including sending the information to the observer in a report message format used in the media path to report media path statistics.

6. A method according to claim 1 including sending statistics in the information regarding an amount of data sent in the media path by a media path sender and an amount of data received in the media path by a media path receiver.

7. A method according to claim 1 including sending statistics in the information about when packets in the media path were sent from a media path sender and when packets in the media path were received at a media path receiver.

8. A method according to claim 1 including sending the information from both a media endpoint that sends packets in the media path and from a media endpoint that receives packets in the media path.

9. A method according to claim 1 including:

receiving multiple requests for the information from different observers devices or from one or more media endpoints associated with the different observer devices, and

sending the information to each of the different observer devices.

10. A network processing device, comprising:

a processor configured to participate in a media path connection over a packet switched network and receive a request to send information regarding the media path connection to a monitoring device not participating in the media path connection over a signaling network from a device other that the monitoring device, the processor obtaining information regarding the media path connection and sending the information to the monitoring device.

11. A network processing device according to claim 10 wherein the processor is configured to send a report message to a gateway at an opposite end of the media path connection and send the same, or portions, of the same report message to the monitoring device.

12. A network processing device according to claim 10 wherein the media path connection is used for transferring packets containing audio or video data.

13. A network processing device according to claim 10 wherein the media path connection is established using a Real Time Protocol (RTP) and the information is transmitted to the monitoring device using a Real Time Control Protocol (RTCP).

14. A network processing device according to claim 10 wherein the processor is part of a gateway that establishes the media path connection.

15. A network processing device according to claim 10 wherein the processor receives the request from a device that manages signaling for the media path connection and is coupled to the observer device.

16. A network processing device according to claim 15 wherein the processor is configured to receive one or more requests to send the information to multiple observer devices and send packets containing the information to IP addresses associated with each one of the multiple observer devices.

17. A network processing device according to claim 10 where the processor is configured to send an identifier in the information about the media path connection that identifies a type of data associated with the media path connection.

18. A protocol, comprising:

signaling messaging for establishing a media path over a packet based network and identifying locations that are not participating in the media path to receive statistics regarding the media path, the signaling messaging directly exchanged between devices participating in the media path over a signaling network; and

report messaging containing statistics for the media path that are sent to the locations identified in the signaling messaging.

19. A protocol according to claim 18 wherein the signaling messaging uses a Media Gateway Control Protocol (MGCP), Session Initiated Protocol (SIP), H.323, or Megaco.

20. A protocol according to claim 18 wherein the report messaging uses RTCP reports.

21. A protocol according to claim 18 wherein the report messaging includes statistics about number of packets sent in the media path and number of packets received in the media path.

22. A protocol according to claim 18 wherein the report messaging is sent from media paths at opposite ends of the media path.

23. A protocol according to claim 18 including an attribute to a RTP SDP packet that identifies the locations that are not participating in the media path.

24. An electronic storage medium containing software for monitoring a media path in a network when executed by a processor or multiple communicating processors, the software comprising:

code for receiving, at a media endpoint, a request to send information to an observer device that is not in the media path over a signaling network from a device other that the observer device, the request identifying a location of the observer device; and

code for sending information about the media path from the media endpoint in the media path to the observer device not in the media path.

25. An electronic storage medium according to claim 24 including code for receiving the request in signaling used for establishing the media path.

26. An electronic storage medium according to claim 25 including code for receiving the request over a packet based media path protocol.

27. An electronic storage medium according to claim 26 including code for receiving the request over a signaling protocol for Real Time Transfer Protocol (RTP) and sending the information to the observer device using a Real Time Control Protocol.

28. An electronic storage medium according to claim 24 including code for sending the information to the observer in a report message format used in the media path to report media path statistics.

29. An electronic storage medium according to claim 24 including code for sending statistics in the information regarding an amount of data sent in the media path by a media path sender and an amount of data received in the media path by a media path receiver.

30. An electronic storage medium according to claim 24 including code for sending statistics in the information about when packets in the media path were sent from a media path sender and when packets in the media path were received at a media path receiver.

31. An electronic storage medium according to claim 24 including code for sending the information from both a media endpoint that sends packets in the media path and from a media endpoint that receives packets in the media path.

32. An electronic storage medium according to claim 24 including:

code for receiving multiple requests for the information from different observers devices or from one or more media endpoints associated with the different observer devices, and

code for sending the information to each of the different observer devices.

33. A system for monitoring a media path in a network, comprising:

means for receiving, at a media endpoint, a request to send information to an observer device that is not in the media path over a signaling network from a device other that the observer device; and

means for sending information about the media path from the media endpoint in the media path to the observer device not in the media path.

34. A system according to claim 33 including means for receiving the request in signaling used for establishing the media path.

35. A system according to claim 34 including means for receiving the request over a packet based media path protocol.

36. A system according to claim 35 including means for receiving the request using a signaling protocol for Real Time Transfer Protocol (RTP) and sending the information to the observer device using a Real Time Control Protocol.

37. A system according to claim 33 including means for sending the information to the observer in a report message format used in the media path to report media path statistics.

38. A system according to claim 33 including means for sending statistics in the information regarding an amount of data sent in the media path by a media path sender and an amount of data received in the media path by a media path receiver.

39. A system according to claim 33 including means for sending statistics in the information about when packets in the media path were sent from a media path sender and when packets in the media path were received at a media path receiver.

40. A system according to claim 33 including means for sending the information from both a media endpoint that sends packets in the media path and from a media endpoint that receives packets in the media path.

41. A system according to claim 33 including:

means for receiving multiple requests for the information from different observer devices or from one or more network processing devices associated with the different observer devices; and

means for sending the information to each of the different observer devices.