Journal on Communications ›› 2019, Vol. 40 ›› Issue (8): 45-53.doi: 10.11959/j.issn.1000-436x.2019170

• Papers • Previous Articles     Next Articles

Beamforming for heterogeneous cloud radio access network

Jiakuo ZUO1,2,Longxiang YANG2,Nan BAO1   

  1. 1 College of Internet of Things,Nanjing University of Posts and Telecommunications,Nanjing 210023,China
    2 College of Telecommunications and Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210023,China
  • Revised:2019-07-01 Online:2019-08-25 Published:2019-08-30
  • Supported by:
    The National Natural Science Fundation of China(61801237);The National Natural Science Fundation of China(61701255);Postdoctoral Fund of Jiangsu Province(SBH17024);Jiangsu University of Natural Science Foundation(15KJB510026);The Natural Science Foundation of Jiangsu Province(BK20150866);Introduction of Talent Fund of Nanjing University of Posts and Telecommunications(NY215046);Introduction of Talent Fund of Nanjing University of Posts and Telecommunications(NY217056)

Abstract:

To overcome the problem that previous researches for heterogeneous cloud radio access network (H-CRAN) mainly focus on single macro cell,and only considered the intracell interference in the one macro cell,while the inter cell interferences among different macro cells are neglected,H-CRAN with multiple macro-cells was studied,and the objective was to maximize system sum-rate through jointly optimizing the beamforming vectors of macro base stations (MBS) and remote radio heads (RRH).Based on alternating optimization and Lagrangian dual method,a joint MBS and RRH beamforming algorithm was proposed.The original problem was first divided into two subproblems.Then,the two sub-problem were solved alternately to obtain the final solutions of the original problem.In addition,the closed expression solutions of the two sub-problem were derived based on Lagrangian dual method.The proposed algorithm was compared with some beamforming algorithms in the simulation.The experimental results demonstrate the proposed algorithm has a better performance in improving the sum-rate of H-CRAN.

Key words: heterogeneous cloud radio access network, beamforming, alternating optimization, multi-antenna technology

CLC Number: 

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