Downlink NOMA transmission for low-latency short-packet communications

Xiaofang Sun, Shihao Yan, Nan Yang, Zhiguo Ding, Chao Shen, Zhangdui Zhong

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

20 Citations (Scopus)


This work introduces non-orthogonal multiple access (NOMA) into short-packet communications to reduce latency over the air interface in wireless networks. Specifically, we address the optimization of transmission rates and power allocation to maximize the effective throughput of the user with a higher channel gain while guaranteeing the other user achieving a certain level of effective throughput. To demonstrate the benefits of NOMA, we analyze the optimal performance of orthogonal multiple access (OMA) as a benchmark. Our examination shows that NOMA can significantly outperform OMA by achieving a higher effective throughput with the same latency or incurring a lower latency to achieve the same effective throughput targets. Surprisingly, we find that the performance gap between NOMA and OMA becomes more prominent when the effective throughput targets at the two users become comparable. This demonstrates that NOMA can significantly reduce the transmission latency and achieve fairness between users for short-packet communications.

Original languageEnglish
Title of host publication2018 IEEE International Conference on CommunicationsWorkshops (ICC Workshops)
Subtitle of host publicationproceedings
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages6
ISBN (Electronic)9781538643280
ISBN (Print)9781538643297
Publication statusPublished - 2018
Event2018 IEEE International Conference on Communications Workshops, ICC Workshops 2018 - Kansas City, United States
Duration: 20 May 201824 May 2018

Publication series

ISSN (Electronic)2474-9133


Conference2018 IEEE International Conference on Communications Workshops, ICC Workshops 2018
Country/TerritoryUnited States
CityKansas City


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