Unsourced multiple access for 6G massive machine type communications

Unsourced multiple access (UMA) is a multi-access technology for massive, low-power, uncoordinated, and unsourced Machine Type Communication (MTC) networks. It ensures transmission reliability under the premise of high energy efficiency. Based on the analysis of the 6G MTC key performance indicators...

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Bibliographic Details
Published inChina communications Vol. 19; no. 3; pp. 70 - 87
Main Authors Li, Yuanjie, Dai, Jincheng, Si, Zhongwei, Niu, Kai, Dong, Chao, Lin, Jiaru, Wang, Sen, Yuan, Yifei
Format Journal Article
LanguageEnglish
Published China Institute of Communications 01.03.2022
Key Laboratory of Universal Wireless Communications,Beijing University of Posts and Telecommunications,Beijing 100876,China%China Mobile Research Institute,Beijing 100053,China
Subjects
5G mobile communication
6G mobile communication
Complexity theory
Delays
Encoding
machine type communications
massive random access
NOMA
Reliability
uncoordinated
unsourced multiple access
6G
unco-ordinated
machine type communications
unsourced multiple access
massive random access
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ISSN1673-5447
DOI10.23919/JCC.2022.03.005

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Summary:Unsourced multiple access (UMA) is a multi-access technology for massive, low-power, uncoordinated, and unsourced Machine Type Communication (MTC) networks. It ensures transmission reliability under the premise of high energy efficiency. Based on the analysis of the 6G MTC key performance indicators (KPIs) and scenario characteristics, this paper summarizes its requirements for radio access networks. Following this, the existing multiple access models are analyzed under these standards to determine UMA's advantages for 6G MTC according to its design characteristics. The critical technology of UMA is the design of its multiple-access coding scheme. Therefore, the existing UMA coding schemes from different coding paradigms are further summarized and compared. In particular, this paper comprehensively considers the energy efficiency and computational complexity of these schemes, studies the changes of the above two indexes with the increase of access scale, and considers the trade-off between the two. It is revealed by the above analysis that some guiding rules of UMA coding design. Finally, the open problems and potentials in this field are given for future research.
ISSN:1673-5447
DOI:10.23919/JCC.2022.03.005