5G终端空闲态节能方案分析

doi:10.11959/j.issn.1000-0801.2021066

Telecommunications Science ›› 2021, Vol. 37 ›› Issue (4): 125-131.doi: 10.11959/j.issn.1000-0801.2021066

• Engineering and Application • Previous Articles Next Articles

Power saving techniques for 5G RRC_Idle mode UE

Tuo YANG¹, Lijie HU¹, Fei WANG¹, Jianjun LIU¹, Nan HU¹, Nan LI¹, Zhenping HU²

¹ China Mobile Research Institute, Beijing 100053, China
² China Mobile Communications Group Co., Ltd., Beijing 100032, China

Revised:2021-02-08 Online:2021-04-20 Published:2021-04-01

Abstract

Abstract:

The power consumption of 5G UE is much serious than 4G UE due to larger bandwidth, massive MIMO, and higher data rate and has been one of the important reason affecting users’ experience of 5G network.3GPP has promoted the study and standardization of NR UE power saving techniques, which the R16 techniques is designed for RRC_connected mode and the started R17 techniques focus on RRC_idle mode.The power consumption of NR UE in RRC_idle was analyzed and compared with LTE UE.The power saving techniques to solve the power consumption in paging and tracking procedure were proposed and the power saving gain were also evaluated.The proposed techniques can reduce 5G UE power consumption and be applicable to future 5G commercial UE.

Key words: UE power saving, RRC_Idle mode, paging, TRS

CLC Number:

TN929

Tuo YANG, Lijie HU, Fei WANG, Jianjun LIU, Nan HU, Nan LI, Zhenping HU. Power saving techniques for 5G RRC_Idle mode UE[J]. Telecommunications Science, 2021, 37(4): 125-131.

Figures/Tables 9

物理层过程	相对能耗	时间/ms	注释
深度睡眠	P_DS=1	T_DS	取决于PO配置
中度睡眠	P_LS=20	T_LS	取决于PO配置
浅度睡眠	P_MS=45	T_MS	取决于PO配置
SSB处理	P_SSB=50	T_SSB=2	NR 利用SSB同步
CRS处理	P_CRS=50	T_CRS=1	LTE利用 CRS 同步
PDCCH-only检测	P_PDCCH=50		NR和LTE相同
PDCCH+PDSCH检测	P_PDCCH+PDSCH=120		NR和LTE相同
PO处理	P_PO=50（没有寻呼PDSCH）	$T_{PO} = \frac{1}{4}$	LTE 1 ms
	P_PO=120（有寻呼PDSCH）		NR 4 ms

	转换时间/ms	转换能耗
深度睡眠	$T_{{DS}_{T}} = 20$	E_DS=450
中度睡眠	$T_{{LS}_{T}} = 6$	E_LS=100
浅度睡眠	$T_{{MS}_{T}} = 0$	E_MS=0

参数	取值
子载波间隔	30 kHz
载波数量	1
带宽	20 MHz
DRX周期	1.28 s
PO寻呼概率	10%
SSB配置	每个SSB burst 包含8个波束（2 ms）
SSB周期	20 ms
PO检测时间	4 ms（8时隙）

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Power saving techniques for 5G RRC_Idle mode UE

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