. "26230" . "On-line Monitoring of VoIP Quality Using IPFIX" . "Advances in Electrical and Electronic Engineering - intenetov\u00FD \u010Dasopis (http://advances.utc.sk)" . "Matou\u0161ek, Petr" . . "RIV/00216305:26230/14:PU112003!RIV15-MV0-26230___" . . "On-line Monitoring of VoIP Quality Using IPFIX"@en . "2014" . "P(VG20102015022), S" . . . . "Kme\u0165, Martin" . "The main goal of VoIP services is to provide a reliable and high-quality voice transmission over packet networks. In order to prove the quality of VoIP transmission, several approaches were designed. In our approach, we are concerned about on-line monitoring of RTP and RTCP traffic. Based on these data, we are able to compute main VoIP quality metrics including jitter, delay, packet loss, and finally R-factor and MOS values. This technique of VoIP quality measuring can be directly incorporated into IPFIX monitoring framework where an IPFIX probe analyses RTP/RTCP packets, computes VoIP quality metrics, and adds these metrics into extended IPFIX flow records. Then, these extended data are stored in a central IPFIX monitoring system called collector where can be used for monitoring purposes. This paper presents a functional implementation of IPFIX plugin for VoIP quality measurement and compares the results with results obtained by other tools."@en . . . "4" . . . "CZ - \u010Cesk\u00E1 republika" . "VoIP quality, R-factor, IPFIX, monitoring"@en . . "On-line Monitoring of VoIP Quality Using IPFIX"@en . . "http://advances.utc.sk/index.php/AEEE/article/view/1203" . "3"^^ . "The main goal of VoIP services is to provide a reliable and high-quality voice transmission over packet networks. In order to prove the quality of VoIP transmission, several approaches were designed. In our approach, we are concerned about on-line monitoring of RTP and RTCP traffic. Based on these data, we are able to compute main VoIP quality metrics including jitter, delay, packet loss, and finally R-factor and MOS values. This technique of VoIP quality measuring can be directly incorporated into IPFIX monitoring framework where an IPFIX probe analyses RTP/RTCP packets, computes VoIP quality metrics, and adds these metrics into extended IPFIX flow records. Then, these extended data are stored in a central IPFIX monitoring system called collector where can be used for monitoring purposes. This paper presents a functional implementation of IPFIX plugin for VoIP quality measurement and compares the results with results obtained by other tools." . "9"^^ . "34596" . "3"^^ . . "1804-3119" . . "10.15598/aeee.v12i4.1203" . "[2A573FEE027F]" . "RIV/00216305:26230/14:PU112003" . "Kme\u0165, Martin" . "Basel, Martin" . . . . "On-line Monitoring of VoIP Quality Using IPFIX" . .