基于干扰贡献比的密集异构网络小小区开关算法

An Interference Contribution Rate Based SeNB Switching on/off Algorithm for Dense Heterogeneous Networks

小小区密集部署的异构网络是5G系统提升网络容量与数据速率的最有效的关键技术之一.随着小小区的大量部署,小小区之间的同频干扰以及小小区基站(Small Cell Base Stations,SeNBs)的能耗问题愈发显著.为提高SeNBs能效并降低小小区间的同频干扰,提出一种基于干扰贡献比(Interference Contribution Ratio,ICR)的小小区开关算法,可以仅通过较少的用户设备(User Equipment,UE)信息反馈量与测量过程实现有效的小小区开关操作.仿真表明,所提算法在保持较低的小小区业务损失量的前提下,能有效地降低小小区之间的同频干扰,提高网络总速率与SeNBs能效.

Dense heterogeneous networks(DenseHetNets)is one of the most promising technologies to enhance the 5G network capacity.However,with a large number of small cells,the problem of co-channel interference and energy efficiency of small cell base stations(SeNBs)becomes more and more severe.In order to improve the power efficiency and alleviate the co-channel interference,small cells need to be switched on or off accordingly.This paper proposes a SeNB switching on/off algorithm based on the interference contribution rates of the small cells that involve less signaling information in the procedure of switching on/off operation and require less computational complexity under the dense HetNet environment.Simulation results show that the algorithm proposed in this paper can effectively reduce the co-channel interference of small cells and improve the total network rate,at the same time,maintain a lower loss rate of load in small cells.