Joint User Experience and Energy Efficiency Optimization in Heterogeneous Small Cell Network

Liangrui TANG  Hailin HU  Jiajia ZHU  Shiyu JI  Yanhua HE  Xin WU  

IEICE TRANSACTIONS on Communications   Vol.E101-B   No.6   pp.1453-1461
Publication Date: 2018/06/01
Publicized: 2017/12/08
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2017EBP3307
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
HSCN,  SC allocation,  power control,  user experience,  energy efficiency,  

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Heterogeneous Small Cell Network (HSCN) will have wide application given its ability to improve system capacity and hot spot coverage. In order to increase the efficiency of spectrum and energy, a great deal of research has been carried out on radio resource management in HSCN. However, it is a remarkable fact that the user experience in terms of traffic rate demands has been neglected in existing research with excessive concentration on network capacity and energy efficiency. In this paper, we redefined the energy efficiency (EE) and formulate the joint optimization problem of user experience and energy efficiency maximization into a mixed integer non-linear programming (MINLP) problem. After reformulating the optimization problem, the joint subchannel (SC) allocation and power control algorithm is proposed with the help of cluster method and genetic algorithm. Simulation results show that the joint SC allocation and power control algorithm proposed has better performance in terms of user experience and energy consumption than existing algorithms.