谷欣杏 韦再雪 李高斯 桑林

【摘 要】随着LTE全面商用的深入，部分区域网络覆盖质量问题随之凸显。提出一种基于遗传算法的LTE系统网络覆盖优化方法，该方法来源于遗传算法，并根据LTE系统实际天线情况对遗传算法进行改进。首先根据现网扫频数据和天线参数计算网络覆盖质量，其次调整天线参数，再次估计调整后的网络覆盖质量，之后比较覆盖质量，如此循环迭代直至产生多个更优方案，最后从更优方案中筛选出最佳优化方案。该方法可依据现网情况灵活设置优化模式以及参数调整优先级，从而快速、准确地得到不同种模式下基站天线参数优化方案，并且在算法实现过程中对其进一步优化，大大提高了寻优效率。

【关键词】天线参数；遗传算法；LTE系统；覆盖优化

Network Coverage Optimization Method Based on

Genetic Algorithm for LTE System

GU Xinxing， WEI Zaixue， LI Gaosi， SANG Lin

[Abstract] With the development of commercial LTE system， the part of network coverage quality is highlighted. A network coverage optimization method for LTE system based on genetic algorithm was proposed in the paper. The genetic algorithm was improved in the proposed method according to the actual antennas of LTE system. Firstly， the network coverage quality was estimated according to the sweep data in current network and antenna parameters. Secondly， the antenna parameters were adjusted， the adjusted network coverage quality was re-estimated， and the two estimated quality were compared. Then， the best optimization scheme from all the variation schemes was selected； the above steps were repeated until an optimization was generated. According to the proposed method， can the optimization mode and the parameter adjustment priority were flexibly set according to the current situation， the optimization scheme of the base station antenna parameters in different modes were obtained quickly and accurately， and the algorithm was further optimized in the process of algorithm implementation so as to greatly improve the optimization efficiency.

[Key words]antenna parameter； genetic algorithm； LTE system； coverage optimization

1 引言

自從LTE被3GPP组织制定为全球通用标准以来，LTE网络得到了快速的发展。截止到目前，LTE网络已经覆盖了国内外广大区域，成为移动通信网领域中至关重要的一部分。但是，随着LTE全面商用的深入，基站天线增多、基站周围环境变化以及前期规划布局不合理等原因，导致实际网络中存在覆盖质量较差的区域。对于这些网络覆盖质量较差的区域，传统上主要依据工程师的经验来调整基站天线参数来对其进行改善，但此种方案效率低、准确度差，难以满足现网基站天线优化的要求。因此，需要一种能够提供准确高效的寻找到天线参数优化的方案，实现最优网络结构的LTE天线参数优化方法。……