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Joint Resource Allocation and User Association for Heterogeneous Cloud Radio Access Networks

机译：异构云无线电接入网络的联合资源分配和用户关联

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摘要

Cloud radio access networks (C-RANs) have been regarded as a promising architecture for energy-efficient fifth generation systems. In this paper, a new joint remote radio head (RRH) activation, user-RRH pairing and resource allocation strategy is proposed for heterogeneous C-RANs (H-CRANs). We first formulate an optimization problem to maximize the energy efficiency of H-CRANs. Then, a low-complexity suboptimal solution is developed. Our proposed mechanism consists of three key procedures: 1) RRH activation is performed based on greedy RRH selection, 2) user-RRH pairing is performed based on the channel quality, 3) the resource allocation problem is solved by dual decomposition. Simulation results show that the proposed strategy can improve energy efficiency significantly.
机译：云无线电接入网（C-RAN）被认为是节能第五代系统的有前途的架构。本文针对异构C-RAN（H-CRAN）提出了一种新的联合远程无线头（RRH）激活，用户-RRH配对和资源分配策略。我们首先提出一个优化问题，以最大化H-CRAN的能效。然后，开发了一种低复杂度的次优解决方案。我们提出的机制包括三个关键过程：1）基于贪婪RRH选择执行RRH激活，2）基于信道质量执行用户-RRH配对，3）通过双重分解解决资源分配问题。仿真结果表明，该策略可以显着提高能源效率。

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