异构网中能效最优的小站部署方案

High-energy efficient deployment scheme of small base stations for heterogeneous network

针对异构蜂窝网中的小站部署问题,本文提出了一种最大化系统能效的小站数量和发射功率联合优化的部署方案.该方案考虑了系统覆盖的约束条件,以最大化系统能效为目标,利用交替迭代搜索法对小站数量及发射功率进行优化.仿真结果表明,所提方案在算法复杂度方面要优于穷举搜索法,并且相对于仅优化小站数量的传统方案,本文提出的联合优化方案能明显提升系统能效.

For small-cell deployment in heterogeneous cellular networks,we investigate the impact of the number of small base stations（BSs） and the transmit powers on network energy efficiency and propose a joint optimization deployment scheme.In this scheme,we first consider the constraints of network coverage and then use an iterative scheme to maximize the network EE（energy efficiency）.Simulation results show that there exists an optimal number of small BSs and transmit power that can not only maximize network EE but also satisfy the constraints.Further,the proposed scheme is more effective than exhaustive searching with respect to the complexity of the algorithm,and the network EE of our scheme has significant gains compared with the traditional scheme when considering only the optimization for the number of small BSs.