5G演进：网络控制直放站

doi:10.11959/j.issn.1000-0801.2022047

Abstract

Abstract:

Radio frequency (RF) repeaters have been deployed in 2G, 3G and 4G to improve the coverage of cellular system.While it is treated as a cost effective solution to extend the network coverage, conventional RF repeaters simply perform amplify-and-forward operation based on the set-up without the capability of doing flexible adjustments based on control and scheduling indication from network.An overview on the new study item in 5G-Advanced was given, i.e.network-controlled repeater.As an enhancement over conventional RF repeaters, network-contrdled repeater will enable the repeater to receive and process repeater control information from the network and perform its amplify-and-forward operation in a more efficient manner including the directive forwarding of the signal, dynamic on-/off of transmissions and receptions, and simplified network integration.

Key words: network-controlled repeater, repeater control information, 5G-Advanced

CLC Number:

TP393

Nan ZHANG, Ziyang LI, Ruyue LI, Wei CAO. 5G-Advanced: network-controlled repeater[J]. Telecommunications Science, 2022, 38(9): 169-176.

Figures/Tables 7

References 25

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参数	配置
布局	蜂窝宏基站（ISD（intersite distance）= 500 m）
载波	30 GHz
	宏基站-用户：5GCM UMa
信道	宏基站-直放站：5GCM UMa
	直放站-用户：UMi-Street canyon
	宏基站：40 dBm
发射功率	直放站：33 dBm
	终端：23 dBm
	宏基站：
	● 共256 Tx /Rx 天线阵子，结构为：(M, N, P, M_g, N_g) = (4, 8, 2, 2, 2)
	● (d_H, d_V) = (0.5, 0.5)λ.(d_g,H,d_g,V) = (4.0, 2.0)λ
	直放站：
天线配置	● 共128 Tx /Rx天线阵子，结构为：(M, N, P, M_g, N_g) = (4, 8, 2, 1, 2)
	● (d_H, d_V) = (0.5, 0.5)λ.(d_g,H,d_g,V) = (4.0, 2.0)λ
	终端：
	● 共32 Tx /Rx天线阵子，结构为：(M, N, P, M_g, N_g) = (2, 4, 2, 1, 2), d_H=d_V=0.5λ
	● (M_g, N_g) = (1, 2); Θ_mg,ng=90°; ?_0,1=?_0,0+180°; (d_g,H, d_g,V)=(0,0)
用户分布	室外均匀分布
业务类型	Full-buffer
注： M_g指天线阵列一列所用子阵（panel）个数 N_g指天线阵列一行所用子阵（panel）个数d_g,H指子阵（panel）间水平间距；d_g,V.指子阵（panel）间垂直间距；N:指一个子阵中所含天线阵子的列数；M: 指一个子阵中单列所含同极化振子数；d_H指天线振子间水平距离 d_V指天线振子间垂直距离；P 表示极化，P =1 天线阵列单极化 P=2 天线阵列双极化；(?_mg,ng, Θ_mg,ng)用来指示第 (mg, ng)个天线子阵的朝向，其中?_mg,ng是该子阵的方位角（array bearing angle） Θ_mg,ng是该子阵下倾角（array downtilt angle）。

5G-Advanced: network-controlled repeater

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