基于指纹数据库与同步参考信号灵活传输的小小区发现
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摘要
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.
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.
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.
引文
[1]Onireti O,Imran A,Imran M A,et al.On energy efficient inter-frequency small cell discovery in heterogeneous networks[C]∥2015 IEEE International Conference on Communications(ICC).London:IEEE,2015:13-18.
[2]Onireti O,Imran A,Imran M A,et al.Energy efficient inter-frequency small cell discovery in heterogeneous networks[J].IEEE Transactions on Vehicular Technology,2016,65(9):7122-7135.
[3]Lopez V F,Pedersen K,Soret B,et al.Improving dense network performance through centralized scheduling and interference coordination[J].IEEE Transactions on Vehicular Technology,2016,66(5):4371-4382.
[4]Hong Y T,Xu X D,Tao M L.Predictive connection time based small cell discovery strategy for LTE-advanced and beyond[C]∥2014 Wireless Communications and Networking Conference(WCNC).Istanbul:IEEE,2014:2061-2066.
[5]Prasad A,Lunden P,Tirkkonen O,et al.Energy efficient small-cell discovery using received signal strength based radio maps[C]∥Vehicular Technology Conference(VTC Spring).Dresden:IEEE,2013:1-5.
[6]Mahbas A.Double spectrum small cell(DSSC)for discovering inter-frequency small cell in Het Net[C]∥2015IEEE International Conference on Communications(ICC).London:IEEE,2015:3454-3459.
[7]Peng S,Tong E,Jiang H,et al.An improved graph coloring based small cell discovery scheme in LTE hyperdense networks[C]∥Wireless Communications and Networking Conference Workshops(WCNCW).New Orleans:IEEE,2015:17-22.
[8]Ji X,Zhang Y,Zhang Z,et al.An efficient synchronization signal design for neighboring cell search[C]∥Vehicular Technology Conference.Seoul:IEEE,2014:1-5.
[2]Onireti O,Imran A,Imran M A,et al.Energy efficient inter-frequency small cell discovery in heterogeneous networks[J].IEEE Transactions on Vehicular Technology,2016,65(9):7122-7135.
[3]Lopez V F,Pedersen K,Soret B,et al.Improving dense network performance through centralized scheduling and interference coordination[J].IEEE Transactions on Vehicular Technology,2016,66(5):4371-4382.
[4]Hong Y T,Xu X D,Tao M L.Predictive connection time based small cell discovery strategy for LTE-advanced and beyond[C]∥2014 Wireless Communications and Networking Conference(WCNC).Istanbul:IEEE,2014:2061-2066.
[5]Prasad A,Lunden P,Tirkkonen O,et al.Energy efficient small-cell discovery using received signal strength based radio maps[C]∥Vehicular Technology Conference(VTC Spring).Dresden:IEEE,2013:1-5.
[6]Mahbas A.Double spectrum small cell(DSSC)for discovering inter-frequency small cell in Het Net[C]∥2015IEEE International Conference on Communications(ICC).London:IEEE,2015:3454-3459.
[7]Peng S,Tong E,Jiang H,et al.An improved graph coloring based small cell discovery scheme in LTE hyperdense networks[C]∥Wireless Communications and Networking Conference Workshops(WCNCW).New Orleans:IEEE,2015:17-22.
[8]Ji X,Zhang Y,Zhang Z,et al.An efficient synchronization signal design for neighboring cell search[C]∥Vehicular Technology Conference.Seoul:IEEE,2014:1-5.