LTE系统中femtocell的动态频谱接入方法

doi:10.11959/j.issn.1000-436x.2015013

Abstract

Abstract:

Dynamic spectrum access method for femtocells in LTE using cognitive radio method to meet the communication requestions was investigated.An uplink sensing method was proposed.By this method,femtocells could not only identify occupied spectrums but also identify service categories of those spectrums.A dynamic spectrum assess method of power control and frequency hopping for femtocells that ensured a low pre-definable performance impact to macro users was proposed.The femtocell could adopt power control to access the spectrum that carried data service while adopt frequency hopping to access the spectrum that carried voice service.Simulation results show that the downlink throughput of the femtocell can be significantly increased by using proposed spectrum access method.

Key words: LTE, femtocell, spectrum sensing, service identification, frequency hopping, power control

Xu-zhou ZUO,Wei-wei XIA,Lian-feng SHEN. Dynamic spectrum access method for femtocells in LTE[J]. Journal on Communications, 2015, 36(1): 111-120.

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References 16

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参数	取值
macrocell半径	500 m
femtocell半径	20 m
eNB天线增益	14 dB
HeNB 天线增益	9 dB
UE/HUE天线增益	0 dB
eNB发射功率	46 dBm
HeNB最大发射功率	23 dBm
UE/HUE发射功率	23 dBm
UE数	100
HUE数	10
femtocell数	10
热噪声	?174 dBm/Hz
UE/HUE/HeNB噪声系数	5 dB
BS噪声系数	7 dB
对数正态阴影	8 dB
穿墙损耗	20 dB

Dynamic spectrum access method for femtocells in LTE

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