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Performance analysis of a distributed power control algorithm for shared and split spectrum femtocell networks

Control Theory and Technology 2016年第4期14卷 314-322页

作者： Kamil SENEL Mehmet AKAR Department of Electrical and Electronics Engineering Bogazici University Istanbul 34342 Turkey

In this paper, we study the performance of a distributed power adjustment algorithm for shared and split spectrum allocation setups. The theoretical analysis reveals that the convergence of the power control algorithm is guaranteed under different spectrum allocation schemes and the convergence rate is exponential. The performance analysis is also carried out via simulations which demonstrate the algorithm fairness under Jain＇s and Atkinkons＇ fairness indices.

关键词： femtocell networks power control consensus

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Clustering-based interference management in densely deployed femtocell networks

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Digital Communications and networks 2016年第4期2卷 175-183页

作者： Jingyi Dai Shaowei Wang School of Electronic Science and Engineering Nanjing University Nanjing 210023 China

Deploying femtocells underlaying macrocells is a promising way to improve the capacity and enhance the coverage of a cellular system. However, densely deployed femtocells in urban area also give rise to intra-tier interference and cross-tier issue that should be addressed properly in order to acquire the expected performance gain. In this paper, we propose an interference management scheme based on joint clustering and resource allocation for two-tier Orthogonal Frequency Division Multiplexing (OFDM)-based femtocell networks. We formulate an optimization task with the objective of maximizing the sum throughput of the femtocell users (FUs) under the consideration of intra-tier interference mitigation, while controlling the interference to the macrocell user (MU) under its bearable threshold. The formulation problem is addressed by a two-stage procedure: femtocells clustering and resource allocation. First, disjoint femtocell clusters with dynamic sizes and numbers are generated to minimize intra-tier interference. Then each cluster is taken as a resource allocation unit to share all subchannels, followed by a fast algorithm to distribute power among these subchannels. Simulation results show that our proposed schemes can improve the throughput of the FUs with acceptable complexity.

关键词： Clustering femtocell networks Interference management

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