Energy-Efficient Resource Allocation in Macrocell-Smallcell Heterogeneous Networks
Energy-Efficient Resource Allocation in Macrocell-Smallcell Heterogeneous Networks
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DOI：
10.12720/jcm.11.5.440-445
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
Lingyun Feng;Yueyun Chen;Xinzhe Wang
中科院分区：
文献类型：
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作者：
Lingyun Feng;Yueyun Chen;Xinzhe Wang
室内环境中的蜂窝用户由于穿透损耗而难以享受仅由宏基站（MBS）提供的高速率服务。作为宏小区的补充，小小区通过与MSB构成异构网络（HetNet）来提供增强的覆盖。HetNet是绿色通信的有效候选者。然而，HetNet中的干扰仍然是一个具有挑战性的问题。在本文中，我们提出了一种能量有效的子信道和功率分配方案（称为EEmax）的下行链路的宏小区-小小区HetNet。在保证数据传输速率和跨层干扰约束条件下，将所有小小区基站能量效率最大化的资源分配问题转化为非凸优化问题。通过等价变换，得到了最优功率和资源块分配的迭代算法和封闭解。仿真结果表明，该算法在能量效率和频谱效率之间取得了较好的平衡。
—Cellular users in indoor environments have difficulty to enjoy high rate services supplied only by macro base station (MBS) due to the penetration loss. Smallcell, as a complement to Macrocell, provide the enhanced coverage through constituting heterogeneous network (HetNet) with MSBs. HetNet is an effective candidate for green communications. However, the interference in HetNet is still a challenging issue. In this paper, we propose an energy-efficient subchannel and power allocation scheme (called EEmax) for a downlink of Macrocell-Smallcell HetNet. The resource allocation to maximize the Energy Efficiency (EE) for all Smallcell Base Stations (SBSs) is formulated a non-convex optimization problem with the condition of the guaranteed data rate and the cross-tier interference constraint. Through an equivalent transformation, an iterative algorithm and the closedform solution for the optimal power and resource block allocation are obtained. Simulation results show that the proposed EEmax algorithm ballance the resource efficiency both energy and spectrum efficiency.