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SCIENCE CHINA Information Sciences, Volume 59, Issue 12: 122302(2016) https://doi.org/10.1007/s11432-016-5552-6

A QoE-based jointly subcarrier and power allocation for multiuser multiservice networks

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  • ReceivedSep 7, 2015
  • AcceptedDec 2, 2015
  • PublishedJun 13, 2016

Abstract

Quality of experience (QoE) is widely applied to reflect user's satisfaction of the network service, which exactly conforms to the user-centric concept in 5G. In this paper, we propose a QoE-based subcarrier and power allocation algorithm for the downlink transmission of a multiuser multiservice system. For the subcarrier allocation algorithm, the rate proportional fairness factor is defined to ensure the fairness between users. Based on different QoE models of three services, i.e., file down (FD), video streaming and voice over internet protocol (VOIP), a multi-objective optimization method is exploited to allocate the power resource by minimizing the total power consumption and maximizing the mean opinion score (MOS) value of users simultaneously. Simulation results indicate that the proposed algorithm has less power consumption and higher QoE performance than the traditional proportional fairness (PF) algorithm. In addition, the proposed algorithm can achieve nearly the same fairness performance as the PF algorithm. Moreover, when the number of subcarriers becomes larger, the power assumption will be less but with little influence on both the QoE and fairness performances.


Acknowledgment

Acknowledgments

This work was supported in part by National High Technology Research and Development Program of China (Grant No. 2014AA01A701).


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