Method and apparatus for evaluation of service quality of a real time application operating over a packet-based network
AssigneeApparent Networks, Inc.
InventorsLoki Jorgenson, Robert Norris
Life of this patent
Estimating the term…
Abstract
The present invention provides a method and apparatus for determining the service quality performance of a real-time application, for example VoIP, video over IP or IPTV, operating over a path defined in a packet-based network. The present invention performs active probing of a path of the packet-based network by transmitting one or more sequences of packets along the path.
Claims26
A method for evaluation of perceived quality of a real time application operating over a packet-based network, said method comprising the steps of:
- (a) actively probing the packet-based network by transmitting one or more sequences of packets along a path of the packet-based network;
- (b) determining transmission characteristic data for the path, said transmission characteristic data representative of responses of the packet-based network to transmission of the one or more sequences of packets along the path;
- (c) determining a test signature representative of said transmission characteristic data;
- and
- (d) identifying a suitable loss impairment model based on a known signature comparable to the test signature;
- wherein said suitable loss impairment model provides a means for evaluating the perceived quality of a real-time application operating over a packet-based network.
An apparatus for evaluation of perceived quality of a real time application operating over a packet-based network, said system comprising:
- (a) means for actively probing the packet-based network by transmitting one or more sequences of packets along a path of the packet-based network;
- (b) means for determining transmission characteristic data for the path, said transmission characteristic data representative of responses of the packet-based network to transmission of the one or more sequences of packets along the path;
- (c) means for determining a test signature representative of said transmission characteristic data;
- (d) means for identifying a suitable loss impairment model based on a known signature comparable to the test signature and determining an equipment impairment factor using the suitable impairment model and the transmission characteristic data;
- (e) means for determining a transmission rating factor using an appropriate model, said transmission rating factor representative of said perceived quality.
A computer program product comprising a computer readable medium having a computer program recorded thereon which, when executed by a computer processor, cause the processor to execute a method for evaluation of perceived quality of a real time application operating over a packet-based network, said method comprising the steps of:
- (a) actively probing the packet-based network by transmitting one or more sequences of packets along a path of the packet-based network;
- (b) determining transmission characteristic data for the path, said transmission characteristic data representative of responses of the packet-based network to transmission of the one or more sequences of packets along the path;
- (c) determining a test signature representative of said transmission characteristic data;
- and
- (d) identifying a suitable loss impairment model based on a known signature comparable to the test signature;
- wherein said suitable loss impairment model provides a means for evaluating the perceived quality of a real-time application operating over a packet-based network.
Dependencies are inferred from the claim text.