Method and apparatus for evaluation of service quality of a real time application operating over a packet-based network
First Claim
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1. 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.
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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.
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Citations
26 Claims
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1. A method for evaluation of perceived quality of a real time application operating over a packet-based network, said method comprising the steps of:
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(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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An apparatus for evaluation of perceived quality of a real time application operating over a packet-based network, said system comprising:
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(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. - View Dependent Claims (22, 23, 24)
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25. 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:
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(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. - View Dependent Claims (26)
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Specification