On Energy Efficient Design for Dynamic CoMP Transmission in K-Tier Heterogeneous Cellular Networks  

作　　者：Min Xu Xiaofeng Tao Fan Yang Huici Wu 

机构地区：[1]Wireless Technology Innovation (WTI) Institute, National Engineering Laboratory for Mobile Network Security, Beijing University of Posts and Telecommunications

出　　处：《China Communications》2016年第6期147-153,共7页中国通信（英文版）

基　　金：supported by the National Natural Science Foundation of China under Grant No.61231009;the National High-tech Research and Development Program of China under Grant No.2014AA01A701;the Program for New Century Excellent Talents in University of Ministry of Education of China under Grant No.NCET 12-0795

摘　　要：Motivated by the objective of pursuing revenue, improvement in coverage and reduction in energy cost for wireless communication networks have been of great significance for mobile operators. Therefore, heterogeneous cellular networks(HCNs) and Coordinated Multipoint(Co MP) transmission are considered as promising solutions to enhance the performances of wireless communication systems. This paper analyzed the K-tier HCNs with a dynamic downlink Co MP scheme, in which the flexible clusters of cooperative stations are determined by a connecting threshold θ. Using stochastic geometry, the coverage probability(CP) and energy efficiency(EE) of a K-tier HCN operating under this scheme are derived, based on which the trade-off between CP and EE is discovered and discussed. Simulation results show the validity of our derivations. The proposed schememay significantly reduce energy consumption sacrificing a small amount of CP, and outperforms the fixed scheme as well. The CP-EE trade-off are also revealed, whichsuggests suitable trade-off points between CP and EE that will deliver the maximum economic profitability. Tendencies discovered in this paper may provide the operators with opportunities for further optimization in pursuit of economic profitability.Motivated by the objective of pursuing revenue, improvement in coverage and reduction in energy cost for wireless communication networks have been of great significance for mobile operators. Therefore, heterogeneous cellular networks（HCNs） and Coordinated Multipoint（Co MP） transmission are considered as promising solutions to enhance the performances of wireless communication systems. This paper analyzed the K-tier HCNs with a dynamic downlink Co MP scheme, in which the flexible clusters of cooperative stations are determined by a connecting threshold θ. Using stochastic geometry, the coverage probability（CP） and energy efficiency（EE） of a K-tier HCN operating under this scheme are derived, based on which the trade-off between CP and EE is discovered and discussed. Simulation results show the validity of our derivations. The proposed schememay significantly reduce energy consumption sacrificing a small amount of CP, and outperforms the fixed scheme as well. The CP-EE trade-off are also revealed, whichsuggests suitable trade-off points between CP and EE that will deliver the maximum economic profitability. Tendencies discovered in this paper may provide the operators with opportunities for further optimization in pursuit of economic profitability.

关 键 词：heterogeneous cellular networks dynamic CoMP coverage probability energy efficiency trade-offs 

分 类 号：TN929.5[电子电信—通信与信息系统]