一种基于用户划分的LTE上行闭环功率控制算法

长期演进(long term evolution,LTE)上行经典信干噪比(signal to interference plus noise ratio,SINR)闭环功率控制算法未考虑用户对相邻小区的干扰,导致小区总吞吐量较低。针对该问题,提出一种基于用户划分的闭环功率控制算法。根据每个用户到服务小区的路径损耗将其划分为小区中心用户或小区边缘用户,为小区中心用户设置目标SINR值时仍使用经典SINR闭环功率控制算法,为小区边缘用户设置目标SINR值时考虑其对相邻小区的干扰使用新的方法。理论分析以及MATLAB系统级仿真结果表明,与传统闭环功率控制算法和经典SINR闭环功率控制算法相比,该算法能够更加有效地降低小区间干扰,提高小区总吞吐量。

A LTE uplink closed loop power control algorithm based on division of UEs

As the LTE classical SINR uplink closed loop power control algorithm doesn''t consider the interference of neighbor cells, which result in lower through output, we propose a closed loop power control algorithm according to the division of users. Firstly the UEs into cell center UEs or edge UEs is divided, then we use classical SINR algorithm setting target SINR for the center UEs while considering the interference of the edge UEs to the neighbor cells and use a new method. Theoretical analysis and MATLAB simulation results indicate that the proposed algorithm reduced the interference to the neighbor users, and improved the cell throughput compared with the traditional uplink closed loop power control algorithm and classical SINR closed loop power control algorithm.