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Joint Optimization of Parameters for Enhanced Inter-Cell Interference Coordination (eICIC) in LTE-A HetNets Yanzan SUN Zhijuan WANG Tao WANG Yating WU Yong FANG Publication IEICE TRANSACTIONS on Communications Vol.E100-B No.5 pp.799-807 Publication Date: 2017/05/01 Publicized: 2016/11/16 Online ISSN: 1745-1345 DOI: 10.1587/transcom.2016EBP3166 Type of Manuscript: PAPER Category: Wireless Communication Technologies Keyword: HetNet, eICIC, ABS, CRE, ABS power, Full Text: PDF>>
Summary: LTE-Advanced heterogeneous networks (HetNets), consisting of conventional Macrocells overlaid by Picocells and forming a hierarchical cell structure, constitute an attractive way of improving the Macrocell capacity and coverage. However, the inter-tier interferences in such systems can significantly reduce the capacity and cause unacceptably high levels of control channel outage. Thus time domain Enhanced Inter-cell Interference Coordination (eICIC), such as almost blank subframe (ABS) and cell range expansion (CRE) techniques, has been proposed to mitigate the interference and improve the system capacity in HetNets. In order to acquire the benefit of eICIC technology efficiently, the three parameters, i.e. ABS ratio, ABS power and CRE bias, should be carefully configured jointly. Motivated by the above considerations, we first propose a single parameter optimization algorithm that fixes the other two parameters and then optimizes them separately. Then, a heuristic joint parameter optimization algorithm is proposed to maximize the system throughput. Extensive simulation results illustrate that the proposed algorithms clearly outperform the fixed parameter configuration, and is close to that of the traversal search algorithm even though they have lower computation complexity | |||||
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