5G网络上行覆盖增强研究

doi:10.11959/j.issn.1000-0801.2021148

Abstract

Abstract:

The 5G network frequency band is mostly high frequency band, which is rich in bandwidth resources, but the path loss and penetration loss are high, and the uplink coverage is relatively weak.If the low frequency band resources are introduced for uplink transmission, the cooperation of high and low frequency carriers will help to improve the uplink coverage.The link budget and coverage performance of 2.1 GHz and 3.5 GHz bands were analyzed, three uplink coverage enhancement schemes were compared, and the advantages and limitations of carrier aggregation scheme were analyzed.The result shows that carrier aggregation scheme is the optimal solution for 5G network uplink coverage enhancement.

Key words: 5G, uplink coverage enhancement, carrier aggregation

CLC Number:

TP393

Yuhua HU, Xinyan WANG, Bei LI. Research on uplink coverage enhancement of 5G network[J]. Telecommunications Science, 2021, 37(7): 134-141.

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References 6

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关键参数	5G NR TDD（sub-6 GHz）		5G NR FDD（sub-3 GHz）
关键参数	2.6 GHz 64T64R 160 W	3.5 GHz 64T64R 320 W	2.1 GHz 20Mbit/s 4T4R 4×20 W
穿透损耗	基准	3	-1
OTA+人体损耗	基准	0	0
馈线损耗	基准	0	0.5
UE发射功率	基准	0	0
UE噪声系数	基准	0	0
上行自由空间损耗	基准	2.6	-2.7
上行干扰余量	基准	0	0
上行总差异	基准	5.6	-3.2

关键参数	5G NR TDD（sub-6 GHz）		5G NR FDD（sub-3 GHz）
关键参数	2.6 GHz 64T64R 160 W	3.5 GHz 64T64R 320 W	2.1 GHz 20 Mbit/s 4T4R 4×20 W
雨衰	基准	0	0
植被损耗	基准	0	0
砖墙穿透损耗	基准	1～3	-2～-1
混凝土墙穿透损耗	基准	2	-3
石膏板墙穿透损耗	基准	1～2	-1
玻璃墙穿透损耗	基准	1～2	-2～-1
薄木门穿透损耗	基准	2	-1

	超级上行	SUL	CA
技术方案
UL MIMO	A: FDD 1流或 TDD 2流	A: TDD 2流	A: FDD 1流 + TDD 2流
	B: FDD 1流	B: FDD 1流	B: FDD 1流
DL MIMO	A: TDD 4流	A: TDD 4流	A: FDD 2流 + TDD 4流
	B: TDD 1～2流	B: TDD 1～2流	B: FDD 1流 + TDD 1～2流
性能对比	上行覆盖增强；	上行覆盖增强；	上行覆盖增强；
	上行峰值速率提升；	上行峰值速率不变；	上行峰值速率提升；
	下行峰值速率不变；	下行峰值速率不变；	下行峰值速率提升；
	不支持跨站跨小区	不支持跨站跨小区	支持跨站跨小区组网

NR双工模式	TDD	FDD
中心频点	3 450.2 MHz	2 120MHz
带宽	100 MHz	20 MHz
HARQ	开启	开启
功率控制	开启	开启
自适应调制编码	开启	开启
时隙配比	7:3	1:1
CP类型	Normal CP	Normal CP
上行调制方式	QPSK, 16QAM, 64QAM	QPSK, 16QAM, 64QAM
下行调制方式	QPSK, 16QAM, 64QAM, 256QAM	QPSK, 16QAM, 64QAM, 256QAM

	项目		性能目标（FDD为主载波）
	项目		TDD 3.5 GHz	CA
下行峰值速率/(Mbit·s^-1)		近点（-75 dBm）	1 460	1 680
		远点（-105 dBm）	270	345
上行峰值速率/(Mbit·s^-1)		近点（-75 dBm）	380	439
		远点（-105 dBm）	31	41
上行覆盖半径/m		上行1 Mbit/s	331	412
		上行3 Mbit/s	249	310
		上行5 Mbit/s	217	271

Research on uplink coverage enhancement of 5G network

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