异构网络动态配置空白子帧干扰协调算法

A Dynamic Almost Blank Subframes Allocation for Interference Coordination in Heterogeneous Networks

摘要:

为了解决LTE-A系统下两层异构网络中的小区间干扰协调问题,提出了在增强小区中调度几乎空白子帧的干扰方案;为了降低干扰和进一步提高信道利用率,设计了一种动态分配几乎空白子帧的算法;该算法基于小区增强覆盖技术,指出由增强小区用户与总用户的比例来动态的调整几乎空白子帧比例;仿真结果对比了固定比例的几乎空白子帧和动态设定几乎空白子帧的算法,表明动态配置几乎空白子帧的算法,提高了系统容量,改善了信道利用率。

Abstract:

In order to solve the problem of Inter-cell interference coordination under the LTE-A system based on two-tier heterogeneous networks, an interference scheme of almost black subframes is scheduled in range expansion.To reduce interference and further improve the channel utilization,an algorithm of dynamic almost black subframes allocation is proposed.The algorithm is based on the cell enhancement technology, pointing out that expand users proportion of total subscribers to dynamically adjust the ratio of almost blank subframes.The simulation results show that the proposed algorithm achieves system capacity and the efficiency of channel improvements , comparing with a fixed proportion of the almost black subframes.