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Throughput Analysis of NOMA-ALOHA.
- Source :
- IEEE Transactions on Mobile Computing; Apr2022, Vol. 21 Issue 4, p1463-1475, 13p
- Publication Year :
- 2022
-
Abstract
- This paper considers from the perspective of MAC layer, a throughput maximization problem of NOMA-ALOHA, ALOHA implemented over NOMA (non-orthogonal multiple access), that can decode simultaneously transmitted multiple packets via successive interference cancellation (SIC) if each of the multiple packets has a different power level from those of others. We start with a throughput optimization problem for two power levels and extend it to a problem for a general number of power levels. For the case of two power levels, we find upper and lower bounds of the maximum throughput and suggest a practical sub-optimal transmission probability whose throughput is close to the maximum. The maximum throughput of NOMA-ALOHA is at least 1.774 times higher than that of traditional slotted ALOHA in our numerical example. We extend the optimization problem into a general one with arbitrary number of power levels. We numerically analyze the performance through a relaxed problem of the original one with high complexity. Our numerical analysis shows that the maximum throughput of NOMA-ALOHA with three power levels is 2.33 times higher than simple ALOHA’s maximum throughput and that adding one power level to NOMA-ALOHA with two power levels enhances throughput at least by more than 28 percent. [ABSTRACT FROM AUTHOR]
- Subjects :
- NUMERICAL analysis
WIRELESS communications
SILICON carbide
SPACE-time block codes
Subjects
Details
- Language :
- English
- ISSN :
- 15361233
- Volume :
- 21
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Mobile Computing
- Publication Type :
- Academic Journal
- Accession number :
- 155735807
- Full Text :
- https://doi.org/10.1109/TMC.2020.3024767