基于功率控制的LTE系统下行ICIC算法研究

Research on LTE Downlink ICIC Algorithm Based on Power Control

在LTE系统中,小区的边缘用户会同时受到邻区同频用户的干扰,需要一种小区间的干扰协调技术(ICIC)来解决这个问题。分析传统ICIC算法的不足,提出一种优化的算法,通过计算边缘用户在单个干扰用户和多个干扰用户情况下的容量,得出邻区基站较为精确的发射功率控制量。参考3GPP标准案例仿真模型,对该算法进行了仿真,仿真结果表明与传统ICIC算法的相比,该算法可以明显提高边缘用户的吞吐量。

In the LTE system, users at the edge of the cell are interfered by users from adjacent regions working at the same frequency, so an intercell interference coordination （ICIC） technology need to solve this problem. Based on the analysis of the shortage of traditional ICIC algorithm, an optimized algorithm is put forward. The accurate amount of transmission power control is found by calculating the capacity in the case of single interference user and multiple interference users. The optimized algorithm are simulated referencing the 3GPP standard simulation model, the simulation results show that compared with the traditional ICIC algorithm, the optimized algorithm can significantly improve the throughput of the edge users.