摘要
为了解决LTE网络小区PCI规划中边界网络适配困难、模三干扰改善困难的问题,引入了基于图论与遗传算法的小区PCI规划算法。该算法利用道路测试与网管采集的网络运行数据构建新的小区干扰关系矩阵,将PCI规划粒度精细化到小区级别,从模三干扰、复用距离、复用层数、冲突规避四个维度对PCI重规划过程进行约束,以此获得最优的PCI分配方案。通过对一个县级市的LTE运行数据进行综合分析,给出了PCI重规划后的预测结果,并通过PCI规划方案的执行以及评估,验证了预测结果的准确性和算法的实用性。
A cell PCI planning algorithm based on graph algorithm and genetic algorithm was introduced in this paper to solve the problems of dififculties in boundary adaption and improving mod-3 interferences in LTE cell PCI planning. A new cell interference relation matrix was constructed using data collected from drive test and network operation. The PCI planning was ifned to the cell level. The PCI re-planning was constrained by four dimensions which are mod-3 interference, reuse distance, reuse layers and collision avoidance. In this way, an optimal PCI planning was carried out. The data of LTE network operation in a country-level city was analyzed. The result of PCI re-planning was estimated. By carrying out the PCI planning scheme and assessment, the accuracy and practicability of the algorithm was veriifed.
出处
《移动通信》
2016年第20期5-10,共6页
Mobile Communications
关键词
模三干扰
PCI重规划
干扰矩阵
无向全连通图
遗传算法
mod-3 interference
PCI re-planning
interference matrix
non-directional connectivity map
genetic algorithm
