Skip to main content
User Image

Saleh Almowuena, PhD

Assistant Professor

Department of Computer Engineering

علوم الحاسب والمعلومات
Building 31, Office No. 2185

Energy-Aware and Bandwidth-Efficient Hybrid Video Streaming over Mobile Networks

Almowuena, Saleh . 2016

Current cellular networks support video streaming over unicast or multicast. However, there exists a tradeoff between utilizing the two: (i) unicast leads to higher network load, but lower energy consumption of mobile devices, and (ii) multicast results in lower network load, but higher energy consumption. To make the best out of both, we propose to concurrently utilize unicast and multicast for minimizing the energy consumption of mobile devices and minimizing the load on cellular networks. Cellular networks support two multicast schemes: (i) independent cell networks and (ii) multi-cell single frequency networks, where multiple adjacent base stations operate on the same frequency. We first consider the less-complicated independent cell networks, and then extend our solution to single frequency networks for better performance. We formulate the resource allocation in hybrid multicast-unicast streaming systems as a Binary Integer Programming problem. We describe optimal algorithms for the two multicast schemes. We then propose two efficient, heuristic, algorithms that run faster and provide close to optimal results. While our solution is general, for concreteness, we conduct detailed LTE packet-level simulations using OPNET. Our simulation results show the proposed algorithms: (i) scale to many more mobile devices than the state-of-the-art unicast-only approaches and (ii) result in lower energy consumption than the latest multicast-only approaches. In addition, the algorithms designed for multi-cell single frequency networks outperform the algorithms designed for independent cell networks in all aspects, such as service ratio, spectral efficiency, energy saving, video quality, frame loss rate, initial buffering time, and number of re-buffering events.

Volume Number
Issue Number
Magazine \ Newspaper
IEEE Transactions on Multimedia
more of publication

Understanding node mobility is critical for the proper simulation of mobile devices in a wireless network. However, current mobility models often do not reflect the realistic movements of users…

by Mohammed Alenazi, Shatha Abbas, Saleh Almowuena, Maazen Alsabaan

Network function virtualization (NFV) and software-defined networking (SDN) are two technologies that have emerged to reduce capital and operational costs, and to simplify network management.

by Mohammed Alenazi, Abdulrahman Almutairi, Saleh Almowuena, Abdul Wadood, Egemen Çetinkaya

Free-viewpoint video (FVV) applications enable viewers to interactively change their viewing point and watch a scene from different angles. Each FVV is composed of multiple streams representing…

by Ahmed Hamza, Hamed Ahmadi, Saleh Almowuena, Mohamed Hefeeda