Nasralla, Moustafa Mazin (2015) Video quality and QoS-driven downlink scheduling for 2D and 3D video over LTE networks. (PhD thesis), Kingston University, .
Abstract
In recent years, cellular operators throughout the world have observed a rapid increase in the number of mobile broadband subscribers. Similarily, the amount of traffic per subscriber is growing rapidly, in particular with the emergence of advanced mobile phones, smart phones, and real-time services (such as 2D and 3D video, IP telephony, etc.). On the other hand, Long-Term Evolution (LTE) is a technology which is capable of providing high data rates for multimedia applications through its IP-based framework. The Third Generation Partnership Project (3GPP) LTE and its subsequent modification called LTE-Advanced (LTE-A) are the latest standards in the series of mobile telecommunication systems, and they have been already deployed in the developed countries. The 3GPP standard has left the scheduling approaches understandardised, hence this enabled the proposal of standard-compatible solutions to enhance the Quality of Service (QoS) and Quality of Experience (QoE) performance in multi-user wireless network scenarios. The main objective of the PhD project was the design and evaluation of LTE downlink scheduling strategies for efficient transmission of multi-user 2D and 3D video and multi-traffic classes over error prone and bandwith-limited wireless communication channels. The strategies developed are aimed at maximising and balancing the QoS among the users and improving the QoE at the receiver end. Following a review and a novel taxonomy of the existing content-aware and content-unaware downlink scheduling algorithms and a network-centric and user-centric performance evaluation, this thesis proposes a novel QoS-driven downlink scheduling approach for 2D and 3D video and multi-traffic classes over LTE wireless systems. Moreover, this thesis explores the quality of 3D video over LTE wireless networks through network-centric and user-centric performance evaluation of existing and our proposed scheduling algorithms. Admission control is also proposed by considering the different LTE bandwith sizes, in order to achieve high system resource utilization and deliver high 2D and 3D video quality for the LTE users. This thesis introduces the transmission of 3D video over a modelled LTE wireless network. The channel is modelled via Gilbert-Elliot (GE) parameters which represent real statistics of an LTE wireless channel. The results of subjective and objective assessments of the 3D video sequences are provided for different levels of wireless impairments.
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