  The emergence of video applications and video capable devices have
contributed substantially to the increase of video traffic on Internet. New
mechanisms recommending video rate adaptation towards delivering enhanced
Quality of Experience (QoE) at the same time making room for more sessions.
This paper introduces a cross-layer QoE-aware architecture for video traffic
over the Internet. It proposes that video sources at the application layer
adapt their rate to the network environment by controlling their transmitted
bit rate dynamically; and the edge of network at the network layer protects the
quality of the active video sessions by controlling the acceptance of new
session through a video-aware admission control. In particular, it will seek
the most efficient way of accepting new video session and adapting transmission
rates to free up resources for more session while maintaining the QoE of active
sessions. The proposed framework will contribute to the preparation for the
extreme growth of video traffic in the foreseeable future. Simulation results
show that the proposed cross-layer architecture guarantees the QoE for the
admitted sessions and utilizes the link more efficiently comparing to the rate
adaptation only architecture.
