NB-IoT技术特性与组网浅析

doi:10.11959/j.issn.2096-3750.2017.00022

Chinese Journal on Internet of Things ›› 2017, Vol. 1 ›› Issue (2): 84-90.doi: 10.11959/j.issn.2096-3750.2017.00022

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Analysis of NB-IoT technology character and networking

Guang-hui ZHANG,Zhen-qiang SUN,Na LU

China Telecom Corporation Limited Beijing Research Institute,Beijing 102209,China

Revised:2017-09-08 Online:2017-09-01 Published:2018-03-10

Abstract

CLC Number:

TP393

Guang-hui ZHANG,Zhen-qiang SUN,Na LU. Analysis of NB-IoT technology character and networking[J]. Chinese Journal on Internet of Things, 2017, 1(2): 84-90.

Figures/Tables 17

"

NPRACH format	Δf	$N_{sc}^{RU}$	$N_{slets}^{UL}$	时长/ms	$N_{symb}^{UL}$
	3.75 kHz	1	16	32
		1	16	8
1	15 kHz	3	8	4
		6	4	2	7
		12	2	1
	3.75 kHz	1	4	8
2
	15 kHz	1	4	2

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参数	R8 Cat 4	R8 Cat 1	R13 Cat M1	R13 Cat NB1
终端接收机带宽	20 MHz	20 MHz	1.4 MHz	180 kHz
下行峰值速率	150 Mbit/s	10 Mbit/s	1 Mbit/s	170~226 kbit/s
上行峰值速度	50 Mbit/s	5 Mbit/s	1 Mbit/s	~250 kbit/s
终端最大发射功率	23 dBm	23 dBm	20/23 dBm	20/23 dBm
终端接收通路	2	2/1	1	1
双工方式	全双工	全双工	全双工	半双工
部署方式	LTE带内	LTE带内	LTE带内	LTE带内/保护带/独立
覆盖(MCL)	>140 dB	>140 dB	>155 dB	>164 dB
移动性	完全移动性	完全移动性	完全移动性	小区重选
相对Cat4的复杂性	100%	80%	20%	<15%

工作模式	载波配置要求	干扰	覆盖	容量
带内部署	NB-IoT 锚点载波位置遵守 100 kHz频偏±7.5 kHz原则	上行3.75 kHz子载波间隔与LTE不正交，NB-IoT载波左右需预留1PRB保护带或通过调度规避与LTE邻频干扰	受限LTE，最大6 dB抬升，覆盖小	上行预留保护带影响 LTE容量避开LTE控制信号等位置，影响NB-IoT容量
保护带部署	不同 LTE 带宽可用保护带带宽不同，LTE带宽不小于5 Mbit/s	与其他系统邻频干扰风险大，基本无法共存	受限LTE，最大6 dB抬升，覆盖小	NB-IoT容量无影响
独立部署	频谱相对独立，部署位署灵活。NB-IoT载波中心频率满足100 kHz整数部要求即可	采用频率隔离措施，可规避与LTE和其他系统间的干扰	功率独立覆盖最大	NB-IoT容量无影响

[1]	3GPP TS 36.211:evolved universal terrestrial radio access (E-UTRA),physical channels and modulation,release 13[S].
[2]	3GPP TS 36.212:evolved universal terrestrial radio access (E-UTRA),multiplexing and channel coding,release 13[S].
[3]	3GPP TS 36.213:evolved universal terrestrial radio access (E-UTRA),physical layer procedure ,release 13[S].
[4]	3GPP TS 36.214:evolved universal terrestrial radio access (E-UTRA),physical layer measurements,release 13[S].

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