Threshold-based cross layer design for video streaming over lossy channels

Abstract

Video applications are highly affected by delay and it eventually requires more effective mechanism to potentially support these applications over wireless channels. Thus, the high demand and need to include different kind of devices with different quality of service (QoS), throughput and heterogeneous terminals with range of capabilities and user preference is very crucial and challenging issue to tackle. In traditional layered approach, all the layers are independent, well defined and designed mainly for specific task. The ability to access multimedia content requires adaptation of media content based on the user interactivity. It is extremely important to provide adequate QoS to support these applications especially in wireless communication media due to the fact that the channel condition changes very rapidly as a result of fading, interference, mobility, handoff and shadowing. There is a dramatic need to bridge the gap between the media content and techniques used to access and deliver increases rapidly. In this paper, we present a basic cross layer design (B-CLD) strategy which adapt with the channel condition and predetermine threshold value. The threshold value has been used to serves as the maximum boundary which the key parameters are compared in order to strategically becides the policy to use. Based on simulation result, the proposed cross layer design scheme outperform non-cross layer design or conventional approach in terms of video quality. More importantly, the delay is relatively low when compared to non CLD approach.