5G双工演进技术研究

doi:10.11959/j.issn.1000-0801.2022050

Abstract

Abstract:

Subband non-overlapping full duplex (SBFD) at gNB side within a conventional TDD band was considered as a key feature of 5G-Advanced to fulfill the challenging requirements of low latency and high uplink throughput emerging in vertical industry and industrial internet.Meanwhile, gNB-to-gNB cross-link interference handling needed to be enhanced to enable different TDD configurations for both public network (Macro) and vertical network (Micro) applied in the same frequency band.With a thorough analysis on the interference characteristic in the potential deployment scenarios for both different TDD configurations and subband non-overlapping full duplex, various feasible interference handling schemes to fulfill the challenging deployment requirements for vertical industry and industrial internet were presented, and the feasibility of above duplex enhancement schemes was checked via link budget, simulation and proof-of-concept prototype.

Key words: duplex evolution, subband non-overlapping full duplex, different TDD frame structure in the same frequency band, SBFD

CLC Number:

TP393

Ting KE, Xinghua SONG, Fei WANG, Zhiheng GUO, Tuo YANG, Chunxia GUO, Chengcheng HAN, Yunfeng LIU, Zhenyu LI. Study on evolution of NR duplex operation[J]. Telecommunications Science, 2022, 38(10): 140-152.

Figures/Tables 20

References 25

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参数	宏基站	微基站
工作带宽BW/MHz	100	100
最大发射功率P_Tx/dBm	53	30
最大接收信号功率P_Rx,Max/dBm	-43	-35
基站噪声系数NF/dB	4	7
基站接收机底噪/dBm	-90	-87
接收机灵敏度恶化/dB	0.8	0.8
干扰余量/dB	7	7
防阻塞干扰抑制能力要求/dB	96	65
总的干扰抑制能力要求/dB	150	124

参数	站间距1	站间距2	站间距3
宏微基站间距/m	50.0	100.0	200.0
工作频点/GHz	4.9	4.9	4.9
信道模型	UMa LOS	UMa LOS	UMa LOS
室外空间传播损耗	79.2	85.8	92.4
穿透损(29.5)＆阴影衰落(6)/dB	35.5	35.5	35.5
室内路损/dB	2.5	2.5	2.5
收/发天线阵列增益/dB	20	20	20
防阻塞干扰抑制能力要求/dB	65	65	65
防阻塞干扰抑制能力/dB	97.2	103.8	110.4
总的干扰抑制能力要求/dB	124	124	124
总的干扰抑制能力/dB	97.2	103.8	110.4

参数	室外宏基站	室内微基站
天线域自干扰隔离度/dB	20	20
数字域子带间干扰抑制能力/dB	45	45
防阻塞干扰抑制能力要求/dB	96	65
防阻塞干扰抑制能力/dB	20	20
总的干扰抑制能力要求/dB	150	124
总的干扰抑制能力/dB	65	65

参数	室外宏基站	室内微基站
工作频点/GHz	4.9	4.9
站间距/m	350	20
信道模型	UMa LOS	InH LOS
空间传播损耗	97.8	68.7
收/发天线阵列增益/dB	20	0
数字域子带间干扰抑制能力/dB	45	45
防阻塞干扰抑制能力要求/dB	96	65
防阻塞干扰抑制能力/dB	77.8	68.7
总的干扰抑制能力要求/dB	150	124
总的干扰抑制能力/dB	122.8	113.7

参数	备注	站间距1	站间距2	站间距3
宏微基站间距/m		50	100	200
宏基站发送功率/dBm		53	53	53
宏基站发送天线阵列增益/dB		20	20	20
穿透损耗(29.5) ＆阴影衰落(6)/dB		35.5	35.5	35.5
室外路损/dB	3GPP UMa LOS信道	81.1	86.8	93.0
室内路损/dB		2.5	2.5	2.5
干扰强度I/dBm	(7)=(2)+(3)-(4)-(5)-(6)	-46.1	-51.8	-58.0
7 dB噪声指数下噪声功率N/dBm		-87	-87	-87
干扰噪声比I/N/dB	(9)=(7)-(8)	40.9	35.2	29.0
接收机灵敏度恶化/dB		40.9	35.2	29.0

Study on evolution of NR duplex operation

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Figures/Tables 20

References 25

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参数	备注	距离1	距离2	距离3
UE-BS距离/m		12	8	3
UE发送功率/dBm		23	23	23
UE发送天线增益/dB		0	0	0
路径传播损耗/dB	3GPP UMa LOS信道模型	-70	-60	-50
上行接收信号强度S/dBm		-47	-37	-27
7 dB噪声指数下噪声功率N/dBm		-87	-87	-87
信噪比/dB	(7)=(5)-(6)	40	50	60

仿真配置参数	参数配置值
接入方式	OFDMA
帧结构	TDD，宏基站：DDDSU，微基站：DSUUU
载频	4.9 GHz
ISD	宏基站：300 m，微基站：20 m
调制	最大到256QAM
子载波间隔	30 kHz
信道模型	宏基站：UMa（Urban Macro），微基站，IIOT（Industrial Internet of Things）
UE分布	宏基站：80%室内3 km/h, 20% 室外30 km/h，微基站：100%室内3 km/h
系统带宽	100 MHz
天线配置	宏基站：BS@32TXRU，UE@4TXRU
	微基站：BS@4TXRU，UE@4TXRU
传输方案	Macro：最大12流；Pico（6TRP协作）：最大12流；SU：最大1流
调度粒度	4RB
UE最大发送功率	26 dBm
调度方案	PF（proportional fair）
接收机	MMSE（minimum mean square error）-IRC（interference rejection combining）
信道估计	Ideal，Non-ideal，基线Ruu估计4RB，基于Muting RE估计的增强方案，Ruu估计粒度0.5RB
功控参数	P0=-60, alpha = 0.6
小区数	宏小区：3 , 微小区: 18
SRS 周期	10 TTI（transmission time interval）
调度粒度	1 slot

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