面向电力业务质量保障的NR-U与Wi-Fi频谱共享

doi:10.11959/j.issn.1000-0801.2023148

Abstract

Abstract:

To alleviate the shortage of 5G licensed spectrum resources, using unlicensed spectrum has become an important solution.With the large-scale access of power terminals, NR-U and Wi-Fi spectrum sharing for power services quality guaranteeing has become an important research hotspot.Firstly, an NR-U uplink transmission mechanism was proposed, which ensured the average throughput of Wi-Fi users and realized the data uplink transmission of power service terminals.In addition, a resource optimization algorithm for joint transmission time and subcarrier allocation (TTSA) was proposed to ensure the quality of service (QoS) of various types of power services and maximize the total throughput of terminals.The optimization problem was decoupled, and proximal policy optimization (PPO) was used to allocate subcarriers to terminals.The simulation results show that compared with the existing algorithms, the proposed resource optimization algorithm for TTSA has superior performance in guaranteeing the service quality of power services and maximizing the total terminals throughput.

Key words: unlicensed spectrum, NR-U, deep reinforcement learning, spectrum sharing

CLC Number:

TN929

Junpeng LIU, Weiwei XIA, Han LIU, Chenglin XIU, Feng YAN, Lianfeng SHEN. NR-U and Wi-Fi spectrum sharing for quality guaranteeing of power services[J]. Telecommunications Science, 2023, 39(7): 11-22.

Figures/Tables 9

References 26

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物理意义	参数
Wi-Fi数据包长度/bit	12 000
MAC层帧头长度/bit	192
物理层帧头长度/bit	224
ACK帧长度	112 bit +物理层帧头
CTS帧长度	112 bit +物理层帧头
RTS帧长度	160 bit +物理层帧头
Wi-Fi比特率/(Mbit·s^-1)	54
电波传播时延/μs	1
时隙长度/μs	20
DIFS/μs	34
SIFS/μs	16
Wi-Fi初始竞争窗口	16
Wi-Fi最大退避次数	6
非授权频谱带宽/MHz	20
AWGN功率/(dBm·Hz^-1)	-174
QPT子载波功率/dBm	-70
LPT子载波功率/dBm	-80
gNodeB子载波数量	256
STA平均速率需求/(Mbit·s^-1)	5

NR-U and Wi-Fi spectrum sharing for quality guaranteeing of power services

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