TY - JOUR
T1 - Performance Evaluation of Uplink Grant-Free Access Networks Based on Spreading-Based NOMA
AU - Abusabah, Ayman T.
AU - Balasubramanya, Naveen Mysore
AU - Oliveira, Rodolfo
N1 - info:eu-repo/grantAgreement/EC/H2020/813391/EU#
info:eu-repo/grantAgreement/FCT/Concurso de Projetos de I&D em Todos os Domínios Científicos - 2022/2022.08786.PTDC/PT#
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50008%2F2020/PT#
Publisher Copyright:
IEEE
PY - 2024/4/1
Y1 - 2024/4/1
N2 - The pressing need to support connectivity to an ever-increasing number of devices has motivated the development of new channel access schemes, which achieve throughput gains with low channel access latency. In this paper, we characterize the performance achieved by an uplink grant-free channel access scheme adopting a spreading-based NOMA scheme. Modeling the network as a stochastic geometry problem and assuming flat fading, we characterize the distribution of the received power from each interferer, the aggregate interference, and the signal-to-interference-plus-noise ratio (SINR) for a given transmitter when Zadoff-Chu (ZC) sequences are adopted to spread the data in orthogonal frequency division multiplexing (OFDM) symbols. The probabilities of false-alarm and detection are derived and compared with simulation results, validating the accuracy of the proposed model. Finally, we provide results of the distribution of the number of successfully decoded transmissions depending on the number of competing nodes, the detection threshold, the networks’ density, and ZC sequence lengths, showing essential insights that can be taken into consideration to design new medium access control (MAC) schemes capable of regulating the uplink channel access of multiple nodes adopting spreading-based NOMA schemes.
AB - The pressing need to support connectivity to an ever-increasing number of devices has motivated the development of new channel access schemes, which achieve throughput gains with low channel access latency. In this paper, we characterize the performance achieved by an uplink grant-free channel access scheme adopting a spreading-based NOMA scheme. Modeling the network as a stochastic geometry problem and assuming flat fading, we characterize the distribution of the received power from each interferer, the aggregate interference, and the signal-to-interference-plus-noise ratio (SINR) for a given transmitter when Zadoff-Chu (ZC) sequences are adopted to spread the data in orthogonal frequency division multiplexing (OFDM) symbols. The probabilities of false-alarm and detection are derived and compared with simulation results, validating the accuracy of the proposed model. Finally, we provide results of the distribution of the number of successfully decoded transmissions depending on the number of competing nodes, the detection threshold, the networks’ density, and ZC sequence lengths, showing essential insights that can be taken into consideration to design new medium access control (MAC) schemes capable of regulating the uplink channel access of multiple nodes adopting spreading-based NOMA schemes.
KW - Grant-Free Channel Access
KW - Internet of Things
KW - NOMA
KW - Non-orthogonal Multiple Access (NOMA)
KW - Performance Evaluation
KW - Radio transmitters
KW - Random Access (RA)
KW - Receivers
KW - Signal to noise ratio
KW - Stochastic processes
KW - Uplink
UR - http://www.scopus.com/inward/record.url?scp=85177997087&partnerID=8YFLogxK
U2 - 10.1109/JIOT.2023.3336509
DO - 10.1109/JIOT.2023.3336509
M3 - Article
AN - SCOPUS:85177997087
SN - 2327-4662
VL - 11
SP - 12953
EP - 12965
JO - IEEE Internet of Things Journal
JF - IEEE Internet of Things Journal
IS - 7
ER -