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Paper Abstract and Keywords
Presentation 2024-06-27 12:35
[Invited Lecture] Throughput Analysis and Maximization of Grant-Free Power-Domain Non-Orthogonal Multiple Access
Takeshi Hirai (Osaka Univ.) CQ2024-32
Abstract (in Japanese) (See Japanese page) 
(in English) This paper introduces an analytical framework for grant-free power-domain non-orthogonal multiple access (called GF-NOMA) in the massive machine-type communications (MTC).
GF-NOMA has a pre-defined set of power levels designed by guaranteeing a high signal-to-interference-and-noise ratio (SINR) enough to decode a packet in each iteration in the successive interference cancellation (SIC).
Each device selects a power level from the set and sets to its transmission power by textit{channel inversion}.
Given multiple packets arrive at a power level at a time-frequency resource, called a power collision, the GF-NOMA experiences packet errors at this power level and others due to the non-orthogonality.
The author proposed an analytical model for GF-NOMA focusing on power collisions and optimizes the selection strategy of power levels by this model.
The proposed model has two key ideas.
The first idea is to model the average packet arrival rate or offered load per level (defined as per-level offered load) to provide packet errors.
The second idea is to model the per-level offered load based on user-specific properties, like the channel and maximum transmission power of each user, by using stochastic geometry.
The optimization results on the proposed model highlighted that the optimal selection strategy achieved 20% higher throughput than the random selection strategy.
Keyword (in Japanese) (See Japanese page) 
(in English) mMTC / grant-free / power-domain NOMA / SIC / power collision / stochastic geometry / /  
Reference Info. IEICE Tech. Rep., vol. 124, no. 90, CQ2024-32, pp. 53-53, June 2024.
Paper # CQ2024-32 
Date of Issue 2024-06-19 (CQ) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF CQ2024-32

Conference Information
Committee CQ  
Conference Date 2024-06-26 - 2024-06-28 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To CQ 
Conference Code 2024-06-CQ 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Throughput Analysis and Maximization of Grant-Free Power-Domain Non-Orthogonal Multiple Access 
Sub Title (in English)  
Keyword(1) mMTC  
Keyword(2) grant-free  
Keyword(3) power-domain NOMA  
Keyword(4) SIC  
Keyword(5) power collision  
Keyword(6) stochastic geometry  
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1st Author's Name Takeshi Hirai  
1st Author's Affiliation Osaka University (Osaka Univ.)
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Speaker Author-1 
Date Time 2024-06-27 12:35:00 
Presentation Time 25 minutes 
Registration for CQ 
Paper # CQ2024-32 
Volume (vol) vol.124 
Number (no) no.90 
Page p.53 
#Pages 1 
Date of Issue 2024-06-19 (CQ) 

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