Method to determine media paths in a SIP network using information from endpoints and intermediate devices
First Claim
1. A method for determining a network path for an internet telephony call, the method comprising:
- receiving by a call analyzer via internet protocol multiple call information records from multiple endpoint and intermediate devices in a network;
wherein each of the call information records comprises a call timestamp, an SIP Call-ID value from an SIP header, and an SSRC identifier from an RTP packet headercorrecting by the call analyzer timestamp errors in the received multiple call information records;
storing by the call analyzer the received call information records;
identifying by the call analyzer a set of matching call information records from among the multiple call information records using corrected timestamp information in the multiple call information records, wherein the set of matching call information records are associated with a single call session between two endpoint devices in the network, whereby the network path for the single call is determined.
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Accused Products
Abstract
An internet telephony call analyzer receives call information from endpoint and intermediate network devices, corrects timestamp errors in the records, stores the records, and identifies records associated with a single call session between two endpoint devices in the network. The timestamp errors may be corrected by applying a time differential correction to a call start timestamp and call stop timestamp of the record if the timestamp in the record differs from a system timestamp when the record was received by the call analyzer. Call information records associated with the same call session may be matched by identifying records with the same SIP call ID, the same SSRC ID and call start timestamps within a predetermined time interval of each other.
14 Citations
4 Claims
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1. A method for determining a network path for an internet telephony call, the method comprising:
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receiving by a call analyzer via internet protocol multiple call information records from multiple endpoint and intermediate devices in a network;
wherein each of the call information records comprises a call timestamp, an SIP Call-ID value from an SIP header, and an SSRC identifier from an RTP packet headercorrecting by the call analyzer timestamp errors in the received multiple call information records; storing by the call analyzer the received call information records; identifying by the call analyzer a set of matching call information records from among the multiple call information records using corrected timestamp information in the multiple call information records, wherein the set of matching call information records are associated with a single call session between two endpoint devices in the network, whereby the network path for the single call is determined. - View Dependent Claims (2, 3, 4)
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Specification