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BLER-based Adaptive Q-learning for Efficient Random Access in NOMA-based mMTC Networks
Tran, Duc Dung; Sharma, Shree Krishna; Chatzinotas, Symeon
2021In Proceedings of 2021 IEEE 93rd Vehicular Technology Conference (VTC2021-Spring)
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Keywords :
BLER; MTC; NOMA; Q-Learning; short-packet communications
Abstract :
[en] The ever-increasing number of machine-type communications (MTC) devices and the limited available radio resources are leading to a crucial issue of radio access network (RAN) congestion in upcoming 5G and beyond wireless networks. Thus, it is crucial to investigate novel techniques to minimize RAN congestion in massive MTC (mMTC) networks while taking the underlying short-packet communications (SPC) into account. In this paper, we propose an adaptive Q-learning (AQL) algorithm based on block error rate (BLER), an important metric in SPC, for a non-orthogonal multiple access (NOMA) based mMTC system. The proposed method aims to efficiently accommodate MTC devices to the available random access (RA) slots in order to significantly reduce the possible collisions, and subsequently to enhance the system throughput. Furthermore, in order to obtain more practical insights on the system design, the scenario of imperfect successive interference cancellation (ISIC) is considered as compared to the widely-used perfect SIC assumption. The performance of the proposed AQL method is compared with the recent Q-learning solutions in the literature in terms of system throughput over a range of parameters such as the number of devices, blocklength, and residual interference caused by ISIC, along with its convergence evaluation. Our simulation results illustrate the superiority of the proposed method over the existing techniques, in the scenarios where the number of devices is higher than the number of available RA time-slots.
Research center :
Interdisciplinary Centre for Security, Reliability and Trust (SnT) > SIGCOM
Disciplines :
Electrical & electronics engineering
Author, co-author :
Tran, Duc Dung ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom
Sharma, Shree Krishna ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom
Chatzinotas, Symeon  ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom
External co-authors :
no
Language :
English
Title :
BLER-based Adaptive Q-learning for Efficient Random Access in NOMA-based mMTC Networks
Publication date :
April 2021
Event name :
2021 IEEE 93rd Vehicular Technology Conference (VTC2021-Spring)
Event organizer :
IEEE
Event place :
Helsinki, Finland
Event date :
from 25-04-2021 to 28-04-2021
Audience :
International
Main work title :
Proceedings of 2021 IEEE 93rd Vehicular Technology Conference (VTC2021-Spring)
Pages :
1-5
Peer reviewed :
Peer reviewed
Focus Area :
Security, Reliability and Trust
FnR Project :
FNR13713801 - Interconnecting The Sky In 5g And Beyond - A Joint Communication And Control Approach, 2019 (01/06/2020-31/05/2023) - Bjorn Ottersten
Name of the research project :
FNR-funded project CORE 5G-Sky (Grant C19/IS/13713801)
Funders :
FNR and ERC
Available on ORBilu :
since 15 March 2021

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