LTE-Advanced中继系统切换优化算法

为了提高LTE-Advanced中继系统的切换性能,提出一种能够提高系统性能的切换优化算法。在切换测量阶段加入测量平均窗口,减小多径效应对接收信号的影响,并考虑用户移动速度对切换测量和切换执行时间的影响;在切换实施阶段,结合LTE-Advanced中继系统中引入的载波聚合技术,采用改进的边缘共享中继方案。经仿真表明,该算法可减少乒乓效应及平均掉话率,简化切换信令流程,降低切换中断时间,提高边缘用户吞吐量。

Handover optimization algorithm in LTE-Advanced relay system

To improve the performance of the handover in LTE-Advanced relay system,a corresponding optimal handover algorithm is proposed.In handover measurement phase,the average measure window is used to reduce the effect of the multipath effect on the received signal,and the effect of user speed on handover measurement phase and handover execution phase is also considered.In handover implement phase,an improved edge sharing relay scheme is adopted by combineing carrier aggregation and relay in LTE-Advanced system.Simulation results show that the optimization algorithm can reduce Ping-pong effect and the average rate of dropped calls,simplify the handover signaling processes,reduce handover interruption time,and improve edge user throughput.