Multiplex communications – Pathfinding or routing – Combined circuit switching and packet switching
Reexamination Certificate
2011-04-26
2011-04-26
Shah, Chirag G (Department: 2477)
Multiplex communications
Pathfinding or routing
Combined circuit switching and packet switching
C370S395300
Reexamination Certificate
active
07933263
ABSTRACT:
A method for determining the existence of calls in a VoIP system is disclosed. The present method enables calls that escape detection under known methods to be captured and analyzed, thereby improving the operation of a monitoring component that incorporates the principles disclosed herein. In one embodiment, an undetermined user datagram protocol (“UDP”) data packet is captured. Analysis of the UDP packet is conducted to determine whether the packet conforms to real-time transfer protocol (“RTP”) or real-time transfer control protocol (“RTCP”) protocols that are associated with VoIP calls. If the packet corresponds to RTP or RTCP protocols, further analysis is conducted to determine whether the packet corresponds to an already-identified call. If not, a new call record is created to track the packet and all other packets relating to the call. Analysis of various metrics and other properties of the packet can then be conducted as needed.
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JDS Uniphase Corporation
Pequignot Matthew A.
Pequignot + Meyers LLC
Shah Chirag G
Zhou Yong
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