阵列处理器中改进几乎空白子帧算法的并行化实现

Parallel Implementation of Improved Almost Blank Subframes Algorithm on Array Processor

两层异构网络中出现的小区间干扰协调是当前异构网络干扰问题研究的热点。针对软件实现增强小区调度几乎空白子帧(ABS)的干扰方案存在处理数据量大、速度慢的缺点,基于可重构阵列结构提出了一种动态ABS干扰协调的并行化硬件实现方案。该算法在增强小区内根据用户数动态分配ABS比例,以改善小区边缘用户的信道容量,通过流水线的方式使用多个轻核处理元(PE)实现并行计算以提高运算效率。测试结果表明,使用12个PE同时调度实现算法的映射,运行1 983个周期,其性能比单个PE提升77.03%,该算法的并行计算能力得到显著提升,宏基站用户的吞吐量可以达到4.76 Mbit/s。

Inter-cell interference （ICI） coordination appears in the two-layer heterogeneous networks is a hot topic in the current research on heterogeneous network interference. The software implementation of cell range expansion control almost blank subfmmes（_ABS） scheme has the weakness of large amount of da_ ta processing and slow speed. Based on the reconfigurable array processor,a dynamic interference coordi-nation method is presented which is ABS parallel implementation hardware implementation scheme. In the cell range expansion, this algorithm dynamically allocates ABS ratio according to the number of users in or-der to improve the channel capacity of the cell edge users. By pipelining processing between multiple Pro-cessing Element （PE） parallel computing, the operation efficiency of the algorithm is improved. The test re-sults show,when 12 PEs are used and scheduled to realize mapping,in 1 983 operation cycle,the perform-ance enhances 77.03% in comparison with single PE. The parallel computing capability of the algorithm is significanty improved and the macro base station user throughput can reach 4.76 Mbit/s.