LTE-Advanced CoMP中自适应动态小区选择方案

摘要

In order to improve the performance of the cell-edge use rand meet the requirement of cell-edge spectral efficiency, CoMP ( Coordinated Multi-Point) transmission technology is introduced in the LTE-Advanced system. This paper proposes a novel downlink coordinative algorithm, which could firstly deter-mine the type of network users, and then select a cooperation set for the cell-edge users. This algorithm, with SINR ( Signal-to- Interference plus Noise Ratio) threshold for adaptive determination of cooperative-cell number, could effectively avoid the unnecessary cooperation and reduce information transmission bur-den of the system. Simulation results show that compared with the existing schemes, the proposed scheme could significantly raise the cooperative efficiency and reduce the information transmission burden of be-tween the base stations of coordination.%为了提高小区边缘用户的性能,满足小区边缘频谱效率的要求,LTE- Advanced系统中引入了协作多点传输技术( CoMP,Coordinated Multi- Point transmission)。提出一种新的下行协作方案,该算法首先判定网络中的用户类型,其次为小区边缘用户选择协作集合。此方案利用信干噪比( SINR, Signal- to- Interference plus Noise Ratio)阈值自适应的确定协作小区的数量,能有效避免不必要的协作,能降低系统的信息传输负担。仿真结果表明,提出的算法相比已经存在的算法能够明显改善协作效率同时能够降低基站间的信息传输负担。