On the Performance Evaluations of Cooperative Retransmission Scheme for Cell-Edge Users of URLLC in Multi-Carrier Downlink NOMA Systems
| Autor: | Jae-Woo Kim, Dong-Seong Kim, Won Jae Ryu, Soo Young Shin |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Computer science
Retransmission Reliability (computer networking) Noma TP1-1185 Signal-To-Noise Ratio Biochemistry Article Analytical Chemistry Computer Communication Networks Telecommunications link medicine Humans ultra-reliable and low-latency communication (URLLC) Electrical and Electronic Engineering Latency (engineering) Instrumentation retransmission business.industry Communication Chemical technology ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS Reproducibility of Results non-orthogonal multiple access (NOMA) medicine.disease cooperative transmission Atomic and Molecular Physics and Optics Block Error Rate Key (cryptography) Enhanced Data Rates for GSM Evolution business Computer network cell-edge user (CEU) |
| Zdroj: | Sensors, Vol 21, Iss 7052, p 7052 (2021) Sensors Volume 21 Issue 21 Sensors (Basel, Switzerland) |
| ISSN: | 1424-8220 |
| Popis: | Non-orthogonal multiple access (NOMA) has a key feature that the cell-center user (CCU) has prior information about the messages of the cell-edge user (CEU) in the same user-pair. It means that CCU can be used for retransmission when the CEU requests retransmission. As ultra-reliability and low-latency communication (URLLC) requires high-reliability constraints (e.g., 99.999%), using CCU for retransmission can be useful to satisfy the reliability constraint. In this study, to ensure the reliability of CEU, cooperative retransmission (CR) scheme for downlink NOMA systems is proposed. And the CR scheme is evaluated with Block error rate (BLER) considering reliability and with packet loss rate (PLR) in terms of reliability and latency constraints. And the evaluation results showed that the proposed CR scheme can satisfy the target BLER for URLLC low SNR compared to the conventional retransmission scheme, and showed the improved PLR compared to the conventional retransmission scheme in low SNRs. |
| Databáze: | OpenAIRE |
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