Design and implementation of a measurement and alert system of QoS parameters in SIP based internet telephony

In modern communication networks, Voice over IP (VoIP) users are even more interested to quantify the quality experienced in a VoIP call. This practice very often addresses the common need of rating the service of a telecommunication provider. To this aim, international standard committees have defined suitable metrics at application layer of the ISO/OSI protocol stack. Unfortunately, the evaluation of such metrics requires procedures and measurement setups very difficult to develop and, consequently, deliver to the final user. On the other hand, VoIP services performance is strongly influenced by the values assumed by the Internet Protocol Packet Delay Variation (¡PDV), also known as packet jitter. IPDV is defined at network layer and can be more easily evaluated than the cited metrics at application layer. The paper deals with the study of the correlation among measured IPDV values at network layer and those characterizing performance metrics at application layer, directly related to the quality perceived by the user in VoIP applications. The final aim is twofold: i) to design a reliable estimator able to forecast the objective quality perceived by the user on the basis of IPDV measurement results, and ii) to implement a procedure compliant with ISO-GUM for coverage interval assessment

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Quality assessment of VoIP services: A proposal based on the measurement of the IP Packet Delay Variation

Angrisani

Capriglione

Ferrigno

et al. 2013

2013 IEEE International Workshop on Measurements &Amp; Networking (M&N)

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Generally, the voice quality of a VoIP call can be analyzed through the measurement of suitable metrics at the application layer of the International Organization for Standardization/Open Systems Interconnection (ISO/OSI) protocol stack. However, the peculiarities of such a kind of measurements make very difficult to provide to each user a value representative of the quality of each VoIP call. On the other hand, the performance of VoIP services is strongly influenced by the Internet Protocol Packet Delay Variation (IPDV) value, which is a typical metric for Quality of Service (QoS) measurements at transport layer and that can be more easily and reliably estimated than metrics at application layer. In this paper, the study of the correlation among the measured IPDV values and performance metrics, directly related to the quality perceived by the user (at application layer), in VoIP applications is proposed. It represents a first step for designing an IPDV estimator able to reliably forecast objective service degradation from the user perspective.Keywords-Communication and computer networks test and measurement, quality of service (QoS) assessment, networking, IP packet delay variation measurement, cross-layer measurement.

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Design and implementation of a measurement and alert system of QoS parameters in SIP based internet telephony

Cited by 3 publications

References 10 publications

Evaluation of QoS Parameters for Real-time Rich Media Applications Using a Test-bed Implementation

Evaluation of QoS Parameters for Real-time Rich Media Applications Using a Test-bed Implementation

Measurement of the IP Packet Delay Variation for a reliable estimation of the mean opinion score in VoIP services

Quality assessment of VoIP services: A proposal based on the measurement of the IP Packet Delay Variation

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