The increasing demand for real-time multimedia applications for
groups of users, together with the need for assuring high quality support for
end-to-end content distribution is motivating the scientific community and
industry to develop novel control, management and optimization mechanisms
with Quality of Service (QoS) and Quality of Experience (QoE) support. In this
context, this paper introduces Q-OSys (QoS-routing with Systematic Access), a
distributed QoS-routing approach for enhancing future networks with
autonomous mechanisms orchestrating admission control, per-class
overprovisioning, IP Multicast and load-balancing to efficiently support multiuser multimedia sessions. Simulation experiments were carried to show the
efficiency and impact of Q-OSys on network resources (bandwidth utilization
and packet delay). Q-OSys is also evaluated from a user point-of-view, by
measuring well-known objective and subjective QoE metrics, namely Peak
Signal to Noise Ratio (PSNR), Structural Similarity (SSM) Video Quality
Metric (VQM) and Mean Opinion Score (MOS)
