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Synchronization for Improving VoIP Quality
The following course examines influences that contribute to the Quality of Service (QoS) issues surrounding Voice over Internet Protocol (VoIP) and the deployment of Next Generation Networks (NGNs). The migration from circuit-switching to packet-switching technologies has several advantages in both cost and architectural aspects that make VoIP attractive to operators. However, questions remain as to whether the voice quality can meet the current high standards that users have been accustomed to in the past.
Parameters such as latency, jitter and packet loss are components of a complex scenario mixed with other application specific issues that ultimately determine the quality of experience (QoE) for a VoIP user. Models can be created using formulas provided by standards bodies such as the International Telecommunications Union (ITU) that attempt to predict performance levels. Other studies (see Ref. [1] and Ref. [2]) have addressed these issues which are summarized here as well. This course adds another ingredient, synchronization, as an added influence that could affect the VoIP performance model.
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