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QoS guarantee is very important and challenging for voice over IP (VoIP) applications. In this paper, a new packet scheduling scheme, called UTS, for transmitting voice flows in a fair and prioritized manner is proposed. UTS first translates user-requested voice quality into network delay requirements and then schedules the transmission of voice packets in such a way that all the VoIP users have a...
Traditional network-level quality of service (QoS) techniques are efficient from a network perspective, but they have not provided a QoS that is satisfactory to users. This paper proposes a dynamic class-based scheme to enhance user-perceived voice quality. Its main strength lies in its careful consideration of users' perception of quality and mapping it to specific values of multiple network parameters...
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