METHODS, SYSTEMS, AND COMPUTER READABLE MEDIA FOR COLLECTING DATA FROM NETWORK TRAFFIC TRAVERSING HIGH SPEED INTERNET PROTOCOL (IP) COMMUNICATION LINKS

• US 20090052454A1
• Filed: 08/04/2008
• Published: 02/26/2009
• Est. Priority Date: 08/02/2007
• Status: Abandoned Application

• Current Assignee: Tekelec
• Original Assignee: Tekelec
• Inventors: Becq, Dominique, Salvin, William, Stoeckel, Christophe, Pourcher, Jean-Francois
• Application Number:
  US12/185,672
• Publication Number:
  US 20090052454A1
• Time in Patent Office: Days
• US Class Current: 370/392
• CPC Class Codes: H04L 41/5022 by giving priorities, e.g. assigning classes of service
• CPC Class Codes: H04L 43/028 by filtering

Abstract

Methods, systems, and computer readable media for collecting data from network traffic traversing a high speed Internet protocol communication links are disclosed. According to one method, a plurality of packet classification filters is cascaded to form n stages of the packet classification filters connected to series, where n is an integer of at least two. At the nth stage, network traffic copied from a high speed IP communication link is received and first packet classification processing is performed to identify an attribute of each packet of the network traffic. If the attribute is identifiable at the nth stage and is of interest for a first type of data collection processing, the first type of data collection processing is performed for the packet. If the attribute is not identifiable at the nth stage, the packet is forwarded to at least one additional stage of the n stages for second packet classification processing that is different from the first packet classification processing to identify the attribute.

Claims

1. A method for collecting data from network traffic traversing a high speed Internet protocol (IP) communication link, the method comprising:

cascading a plurality of packet classification filters to form n stages of the packet classification filters connected to series, n being an integer of at least two; and

at the nth stage, receiving network traffic copied from a high speed IP communication link and performing first packet classification processing to identify an attribute of each packet of the network traffic, and, if the attribute is identifiable at the nth stage and is of interest for a first type of data collection processing, performing the first type of data collection processing for the packet, and if the attribute is not identifiable at the nth stage, forwarding the packet to at least one additional stage of the n stages for second packet classification processing that is different from the first packet classification processing to identify the attribute.

2. The method of claim 1 wherein the second packet classification processing requires deeper inspection of each packet than the first packet classification processing.

3. The method of claim 1 wherein the IP communication link includes a telecommunications link carrying telecommunication signaling data, telecommunications bearer channel data, and data that is not telecommunication signaling or bearer channel data.

4. The method of claim 1 comprising discarding each packet at the nth stage for which the attribute is identifiable.

5. The method of claim 1 wherein the attribute comprises one of a protocol type and application data.

6. The method of claim 1 comprising, in response to identifying the attribute at the at least one additional stage, performing a second type of data collection processing for packets whose attribute is identified at the at least one additional stage and further comprising dynamically updating criteria used in the first packet classification processing based on results of one of the first and second types of data collection processing.

7. The method of claim 6 wherein dynamically updating criteria used in the first packet classification processing includes adding session aware filter criteria to be used in the first packet classification processing so that packets identified as part of the same session are forwarded to the same module for data collection processing.

8. The method of claim 1 wherein comprising truncating at least some of the packets at the nth stage and forwarding the truncated packets to the at least one additional stage for at least one of the second packet classification processing and a second type of data collection processing.

9. The method of claim 1 wherein the first type of data collection processing includes telecommunications detail record (xDR) generation and wherein the method further comprises performing a second type of data collection processing for at least some of the packets reaching the at least one additional stage, wherein the second type of data collection processing includes generation of a statistical measure based on the network traffic.

10. The method of claim 9 wherein the statistical measure comprises a call quality metric for a media connection.

11. The method of claim 10 wherein the call quality metric comprises a mean opinion score (MOS) value.

12. The method of claim 9 wherein the statistical measure includes percentages of traffic of different protocol types.

13. The method of claim 1 wherein the first type of data collection processing includes pre-processing of the packets for a second type of data collection processing performed for at least some of the packets reaching the at least one additional stage and wherein the method further comprises forwarding results of the pre-processing to the at least one additional stage.

14. The method of claim 1 comprising, in response to identifying the attribute at the at least one additional stage, removing a portion of the packet associated with the attribute and feeding the packet back into the nth stage for identification of another attribute of the packet.

15. A system for collecting data for network traffic traversing a high speed Internet protocol (IP) communication link, the system comprising:

at least one signaling link tap for copying network traffic from a high speed Internet protocol communication link;

a plurality of cascaded packet classification filters forming n stages of the packet classification filters connected in series, n being an integer of at least two, at least some of the stages including packet data collection modules for performing different types of packet data collection operations; and

wherein the packet classification filter at the nth stage receives network traffic copied form a high speed IP communication link and performs first packet classification processing to identify an attribute of each packet of the mixed protocol traffic, and, if the attribute is identifiable at the nth stage and is of interest for a first type of data collection processing, a first packet data collection module performs the first type of data collection processing for the packet, and, if the attribute is not identifiable at the nth stage, the packet classification filter at the nth stage forwards the packet to at least one additional stage of the n stages for second packet classification processing that is different from the first packet classification processing to identify the attribute.

16. The system of claim 15 wherein the second packet classification processing requires deeper inspection of each packet than the first packet classification processing.

17. The system of claim 15 wherein the packet classification filter at the nth stage is configured to discard each packet for which the attribute is identifiable.

18. The system of claim 15 wherein the attribute comprises at least one of a protocol type and application data.

19. The system of claim 18 wherein the packet classification filter at the at least one additional stage is adapted to send packets for which it identifies the protocol type back to the nth stage for identification of a protocol type of another portion of the packet.

20. The system of claim 15 wherein the packet classification filter of at least one of the n stages is adapted to dynamically update its packet classification filter criteria based on results of the data collection processing.

21. The system of claim 20 wherein dynamically updating the packet classification filter criteria includes adding a session aware filter criterion to the packet classification filter at the at least one stage so that packets identified as being part of the same session will be forwarded to the same packet data collection module.

22. The system of claim 15 wherein the packet classification filter at the nth stage is adapted to truncate at least some of the packets in the copied network traffic.

23. The system of claim 15 wherein the first packet data collection module comprises a telecommunications detail record (xDR) generation module for generating xDRs based on telecommunication signaling traffic and wherein the system further includes a second packet data collection module comprising a preprocessing and statistics generation module for generating a statistic based on telecommunications traffic.

24. The system of claim 23 wherein the preprocessing and statistics generation module is adapted to generate a call quality metric based on telecommunications bearer channel traffic.

25. The system of claim 24 wherein the call quality metric comprises a medium opinion score (MOS) value.

26. The system of claim 23 wherein the preprocessing and statistics generation module is adapted to identify a relative number of data packets of different protocols traversing the high speed IP communications link.

27. The system of claim 15 wherein the first type of data collection processing includes pre-processing of the packets for a second type of data collection processing and wherein the method further comprises forwarding results of the pre-processing from the first module to the second module.

28. A computer readable medium having stored thereon computer executable instructions that when executed by the processor of a computer perform steps comprising:

cascading a plurality of packet classification filters to form n stages of the packet classification filters connected in series, n being an integer of at least two; and

at the nth stage, receiving network traffic copied from a high speed IP communication link and performing first packet classification processing to identify an attribute of each packet of the network traffic, and, if the attribute is identifiable at the nth stage and is if interest for a first type of data collection processing, performing the first type of data collection processing for the packet, and if the attribute is not identifiable at the nth stage, forwarding the packet to at least one additional stage of the n stages for second packet classification processing that is different from the first packet classification processing to identify the attribute.