(Archived)

The increasing demand for real-time multimedia applications
targeting 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 multi-user 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 Sim