基于指纹数据库与同步参考信号灵活传输的小小区发现

针对小小区间的同频干扰与用户异频扫描的能耗问题，提出一种基于到达时间（TOA）指纹数据库与同步参考信号（PSS/SSS）灵活传输的小小区发现策略.通过减少用户大量无效异频扫描次数，以达到节能的目的.同时，网络端对小小区基站（SBSs）PSS/SSS的发送进行控制，以降低小小区间PSS/SSS的同频干扰.仿真结果表明，所提方案能有效提高小小区的检测率和用户能效.

Small Cells Discovery Based on Fingerprint Database and Synchronization Reference Signals Flexible Transmission

Densely deployed small cells suffer from the problem of severe co-channel interference among the neighbouring cells and user equipments (UEs) in the network are confronted with a challenge of intensive energy consumption in inter-frequency scanning (IFS). In order to deal with the problems, a time of arrival (TOA) fingerprint database based small cell discovery strategy was proposed, where the synchronization reference signals (primary synchronization signal/secondary synchronization signal, PSS/SSS) of small cells are transmitted in a flexible scheme. The proposed method achieves the purpose of energy saving for UE by tremendously reducing the number of invalid inter-frequency detection. Meanwhile, it is capable of alleviating the co-channel interference of synchronization signals among small cells through flexible control of PSS/SSS transmission. Simulation shows that the proposed method can effectively improve the probability of detecting small cells and the energy efficiency of UEs in the network.