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A Cluster-Based Small Cell On/Off Scheme for Energy Efficiency Optimization in Ultra-Dense Networks

  • Cui-Qin DaiEmail author
  • Biao Fu
  • Qianbin Chen
Conference paper
  • 178 Downloads
Part of the Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering book series (LNICST, volume 312)

Abstract

Ultra-Dense Networks (UDN) can greatly meet the demand for explosively growing data traffic via deploying small cells (SCs) densely. However, the SCs densification causes higher energy consumption and more severe inter-cell interference (ICI). The SC on/off control is one of the effective ways to solve above problems, but the challenge is to maintain network coverage while avoiding degradation of the quality of service (QoS) of user equipment (UEs). In this paper, we formulate energy efficiency (EE) optimization problem in stochastic geometry-based network and take into consideration the QoS of UEs and ICI to maximize the EE. The solution is obtained by dividing the problem into SCs clustering and intra-cluster SC on/off control. We first use an improved K-means clustering algorithm to divide the dense SCs into disjoint clusters according to the distance and density of SCs. Then, within each cluster, selecting a SC as the cluster head (CH) is responsible for performing SC on/off operations under taking minimum rate of UEs and ICI as constraints. In addition, a heuristic search algorithm (HSA) is proposed for the intra-cluster SC on/off control. Simulation results demonstrate that the proposed scheme can effectively improve the network energy efficiency and suppress interference.

Keywords

UDN Small cell on/off Clustering Energy efficiency 

Notes

Acknowledgment

This work was jointly supported by the National Natural Science Foundation in China (61601075), the Natural Science Foundation Project of CQUPT (A2019-40).

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Copyright information

© ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2020

Authors and Affiliations

  1. 1.School of Communication and Information EngineeringChongqing University of Posts and TelecommunicationsChongqingChina
  2. 2.Chongqing Key Lab of Mobile Communication TechnologyChongqing University of Posts and TelecommunicationsChongqingChina

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