On the study of fundamental trade‐offs between QoE and energy efficiency in wireless networks

Abstract

During recent years, for the ever‐growing number of users with the exponential growth of high‐data‐rate traffic demand, quality of experience (QoE) has emerged as an important issue, providing important measures and assessment metrics for users, service providers and operators. Meanwhile, rapid development of information and communications technology significantly contributes to the increasing trend of energy consumption and global warming. As a result, green communications that mainly studies energy efficiency (EE) has become an inevitable method to reduce energy consumption, which attracts the attention of both the academia and industries. However, currently, very few research works have been carried out to address the relationship between QoE and EE, which is an important issue for designing a system with QoE and EE trade‐offs. In this paper, we show that there exist fundamental trade‐offs between EE and QoE for users with different traffics, that is, voice, best effort and quality‐of‐service traffic, considering various power consumptions including transmission power, circuit power, interference and network bandwidth all together. A new metric of QoE per watt is introduced, and the fundamental EE–QoE relationship is addressed for different proportions of user groups in an interference‐limited cellular network.Copyright © 2013 John Wiley & Sons, Ltd.

QoE-Aware Sustainable Throughput for Energy-Efficient Video Streaming

“…• The buffer sizes are given in multiples of the depletion capacity and the average off time through the parameter κ according to (20). For the sake of convenience, we define small buffers via a full buffer depletion time of less than one average off time, i.e.…”

“…In [20], the authors suggest a new metric called QoE perceived per user per Watt (QoEW). This metric is useful given the difficulties to measure and to model the QoE-EE trade-offs for different particular scenarios and network architectures.…”

“…As outlined in [6], we aim at the comparison of different video streaming solutions in terms of QoE and EE, captured by the QoEW measure [20] …”

Dealing with QoE and power consumption in Video Distribution Networks

“…Towards this goal, an interesting definition is suggested in [14], which is called QoE perceived by user per Watt (QoEW). This metric is useful given the difficulties to measure and to model the QoE-EE trade-off for different scenarios and network architectures, where EE stands for Energy Efficiency.…”

“…Furthermore, based on that, different optimization studies can be done that combine multiple objectives related to the characteristics of user type and power consumption together with other relevant parameters like network technology, transport protocol, mobile device, battery life, e2e bandwidth and interference factor [6,10,14].…”