LTE-A中下行参考信号冲突的性能分析

Performance Analysis for Downlink Reference Signal Collision in LTE-A

在LTE-A标准中,下行用户级的解调参考信号会与物理广播信道以及主、辅同步信号等冲突。终端可以不接收冲突的资源块甚至整个PDSCH/ePDCCH数据,这将对LTE-A下行系统性能产生较大影响。针对资源冲突情况,系统分析了基站和终端多种解决策略以及相应的理论性能。通过性能仿真给出了冲突解决策略的链路级性能增益。结合仿真结果,建议设备和终端共同改进来约束终端行为并提高性能。

In LTE standard, downlink UE-specific reference signal may col ide with physical broadcast channel, primary and secondary synchronization signals. UE may not receive those col ided resource blocks or even the whole PDSCH data. The col ision impacts the performance of LTE especial y TD-LTE system. It analyzes different implementation methods for eNodeB and UE. By simulation, it shows the link level performance gain after solving the col ision problem. At last it suggests that TD-LTE opera-tors define enterprise standard to restrict UE behavior.