裴旭明^{1, 2},
钱骅¹,
王海峰³,
康凯^{1, 2, 4,,}
1.中国科学院上海高等研究院 上海 201210
2.中国科学院大学 北京 100049
3.中国科学院上海微系统与信息技术研究所 上海 200050
4.中国科学院上海微系统与信息技术研究所无线传感网与通信重点实验室 上海 200050
基金项目:国家自然科学基金(61671436)，上海市科委资助项目(18511103502)

详细信息

作者简介:裴旭明：男，1984年生，工程师，博士生，研究方向为LTE与5G无线通信系统
钱骅：男，1976年生，研究员，研究方向为无线通信系统的物理层理论研究与实现，非线性信号处理及大数据信号处理理论
王海峰：男，1969年生，研究员，研究方向为5G无线通信系统
康凯：男，1977年生，正高级工程师，研究方向为下一代无线通信系统、5G与Wi-Fi系统

通讯作者:康凯　kangk@sari.ac.cn

中图分类号:TN929.5

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被引次数:0

出版历程

收稿日期:2020-06-18
修回日期:2020-11-04
网络出版日期:2020-11-06
刊出日期:2021-07-10

A Novel Discontinuous Reception Mechanism for 5G in Unlicensed Band

Xuming PEI^{1, 2},
Hua QIAN¹,
Haifeng WANG³,
Kai KANG^{1, 2, 4,,}
1. Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
2. University of Chinese Academy of Sciences, Beijing 100049, China
3. Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
4. Key Laboratory of Wireless Sensor Network & Communication, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
Funds:The National Natural Science Foundation of China (61671436), The Science and Technology Commission Foundation of Shanghai (18511103502)


摘要
摘要:非连续接收(DRX)是5G非授权频段部署中重要的节能机制。为授权频段设计的非连续接收机制，不能良好适配非授权频段，唤醒窗口长度固定而不能随信道繁忙程度调整，为保证传输时延性能则需要消耗更多能量。该文针对5G非授权频段新无线技术(5G NR-U)，提出一种新型非连续接收机制。在新机制中，非授权频段新空口设备处于唤醒状态时不断对信道进行能量检测来判断信道的忙闲状态，并据此自适应调整唤醒窗口时间。相比唤醒窗口长度固定的原有机制，数学模型分析和仿真实验的结果表明，在保证业务传输时延要求的前提下，新机制可比原有机制节约更多的能量。在文中典型场景中，新机制比原有机制可多节约能量11%。
关键词:非连续接收/
能量效率/
先听后说/
5G非授权频段新无线技术
Abstract:Discontinuous Reception (DRX) is power-saving mechanism in 5G unlicensed band deployments. Legacy DRX scheme for licensed band does not work well in unlicensed band. Wakeup window size is fixed and can not adjust with channel busy level. Guaranteed transmission delay is at the cost of more power consumption. A novel DRX scheme of is proposed for the 5th Generation New Radio-Unlicensed (5G NR-U) standalone scenario. In the novel scheme, NR-U equipment runs energy detection continuously during its wakeup period to get channel state: busy or free and adjusts its wakeup window size adaptively according to energy detection results. Comparing to legacy method with wakeup window fixed, it is demonstrated by analysis and simulation that the novel method saves more power than traditional method while both of them meet the average delay requirement. In the analysis scenario of this paper, novel method saves 11% power more than legacy method.
Key words:Discontinuous Reception (DRX)/
Energy efficiency/
Listen-Before-Talk (LBT)/
The 5th Generation New Radio-Unlicensed (5G NR-U)



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