Component Carrier Selection and Beamforming on Carrier Aggregated Channels in Heterogeneous Networks

Changyin Sun, Hongfeng Qing, Shaopeng Wang, Guangyue Lu

Department of Communication and Information Engineering, University of Xi’an Posts and Telecommunications, Xi’an, China.
ZTE Cooperation, Xi’an, China.

DOI: 10.4236/cn.2013.53B2040                

Abstract

In this paper, component carrier selection and beamforming on carrier aggregated channels in Heterogeneous Networks are proposed. The scheme jointly selects the component carrier and precoding (i.e. beamforming) vectors with the cooperation of the other cells to deal with the interference between Macro cell and Pico cell. The component carrier selection and beamforming is achieved by optimizing the multi-cell downlink throughput. This optimization results in shutting down a subset of the component carrier in order to allow for a perfect interference removal at the receive side in the dense low power node deployment scenario. Additionally, algorithm based on Branch and Bound Method is used to reduce the search complexity of the algorithm. Simulation results show that the proposed scheme can achieve high cell-average and cell-edge throughput for the Pico cell in the Heterogeneous Networks.

Keywords

Heterogeneous Network; Inter-cell Interference Coordination; Beamforming; Carrier Aggregation

Conflicts of Interest

The authors declare no conflicts of interest.

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