Method and apparatus for analyzing a media path for an internet protocol (IP) media session
First Claim
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1. A method for analyzing a media path in a packet switched network, comprising:
- providing media trace packets configured to use the same application protocol as actual media payload packets to be sent along the media path and further configured to match, at a protocol layer other than that of the application protocol, a priority indicator to be provided by the actual media packets to specify a desired one of a plurality of priority levels available in the network, wherein the media trace packets have the same class of service bits and same ports as the actual media payload packets, and wherein the media trace packets have a different synchronization identifier than the actual media payload packets;
varying a Time To Live (TTL) value in the media trace packets to intentionally cause faults at intermediate nodes in the media path; and
analyzing fault notices received from the intermediate nodes in the media path caused by the media trace packets.
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Abstract
Time To Live (TTL) values are modified in media packets to intentionally cause rejection of the media packets at intermediate nodes in a media path. Rejection notices caused by the TTL modified media packets are then analyzed to isolate Quality of Service (QoS) problems in the media path.
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Citations
24 Claims
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1. A method for analyzing a media path in a packet switched network, comprising:
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providing media trace packets configured to use the same application protocol as actual media payload packets to be sent along the media path and further configured to match, at a protocol layer other than that of the application protocol, a priority indicator to be provided by the actual media packets to specify a desired one of a plurality of priority levels available in the network, wherein the media trace packets have the same class of service bits and same ports as the actual media payload packets, and wherein the media trace packets have a different synchronization identifier than the actual media payload packets; varying a Time To Live (TTL) value in the media trace packets to intentionally cause faults at intermediate nodes in the media path; and analyzing fault notices received from the intermediate nodes in the media path caused by the media trace packets. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for analyzing a media path in a packet switched network, comprising:
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means for providing media trace packets configured to use the same application protocol as actual media payload packets to be sent along the media path and further configured to match, at a protocol layer other than that of the application protocol, a priority indicator to be provided by the actual media payload packets to specify a desired one of a plurality of priority levels available in the network, wherein the media trace packets have the same class of service bits and same ports as the actual media payload packets, and wherein the media trace packets have a different synchronization identifier than the actual media payload packets; means for varying a Time To Live (TTL) value in the media trace packets to intentionally cause faults at intermediate nodes in the media path; and means for analyzing fault notices received from the intermediate nodes in the media path caused by the media trace packets. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A computer readable medium having stored thereon computer executable instructions for analyzing a media path in a packet switched network that, when executed by a processor, causes the processor to perform the method of:
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providing media trace packets configured to use the same application protocol as actual media payload packets to be sent along the media path and further configured to match, at a protocol layer other than that of the application protocol, a priority indicator to be provided by the actual media payload packets to specify a desired one of a plurality of priority levels available in the network, wherein the media trace packets have the same class of service bits and same ports as the actual media payload packets, and wherein the media trace packets have a different synchronization identifier than the actual media payload packets; varying a Time To Live (TTL) value in the media trace packets to intentionally cause faults at intermediate nodes in the media path; and analyzing fault notices received from the intermediate nodes in the media path caused by the media trace packets. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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Specification