A Novel Discontinuous Reception Mechanism for 5G in Unlicensed Band

Xuming PEI; Hua QIAN; Haifeng WANG; Kai KANG

doi:10.11999/JEIT200497

Volume 43 Issue 7

Jul. 2021

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Article Navigation > Journal of Electronics & Information Technology > 2021 > 43(7): 1879-1885

Xuming PEI, Hua QIAN, Haifeng WANG, Kai KANG. A Novel Discontinuous Reception Mechanism for 5G in Unlicensed Band[J]. Journal of Electronics & Information Technology, 2021, 43(7): 1879-1885. doi: 10.11999/JEIT200497

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Xuming PEI, Hua QIAN, Haifeng WANG, Kai KANG. A Novel Discontinuous Reception Mechanism for 5G in Unlicensed Band[J]. Journal of Electronics & Information Technology, 2021, 43(7): 1879-1885. doi: 10.11999/JEIT200497

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A Novel Discontinuous Reception Mechanism for 5G in Unlicensed Band

doi: 10.11999/JEIT200497

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)

Received Date: 2020-06-18
Rev Recd Date: 2020-11-04

Available Online: 2020-11-06

Publish Date: 2021-07-10

Abstract

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.
- Discontinuous Reception (DRX),
- Energy efficiency,
- Listen-Before-Talk (LBT),
- The 5th Generation New Radio-Unlicensed (5G NR-U)

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References(25)

References

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