Optimal Video-Distortion Network Utility and Lifetime Tradeoff for Wireless Multimedia Networks

Abstract

An ever-increasing activity on social networks has led to tremendous increase in the use of wireless handheld devices, and this tendency is expected to continue in the future as well. Using these portable devices, a significant percentage of information exchange activity is either downloading or sharing of multimedia content. However, this raises new challenges, and for efficient transmission of information, both energy efficiency and quality-of-service assurance are imperative. The processing capability of these devices allows them to achieve efficient usage of both battery, as well as bandwidth, while not compromising the multimedia content quality. This paper proposes a joint network lifetime, utility and distortion management based on the multiobjective optimization framework. For that purpose, the notion of distortion-margin is introduced that can provide a certain level of robustness, which we can tradeoff with bandwidth and lifetime performance parameters. Based on sensitivity analysis, an appropriate selection of objective function for video quality robustness is made. An optimal performance tradeoff among contending objectives is evaluated for a distributed realization, and the evaluation results verify the performance gains.