Reliability Analysis of Uplink Grant-Free Transmission Over Shared Resources
Uplink grant-free schemes have the promise of reducing the latency of a user-equipmentinitiated transmission by avoiding the handshaking procedure for acquiring a dedicated scheduling grant. However, the possibility of successfully delivering a payload within a latency constraint may be severely com...
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doaj-d8d26621a5b6488a95303a44ca5975e62021-03-29T20:44:31ZengIEEEIEEE Access2169-35362018-01-016236022361110.1109/ACCESS.2018.28275678340053Reliability Analysis of Uplink Grant-Free Transmission Over Shared ResourcesGilberto Berardinelli0https://orcid.org/0000-0001-6306-6750Nurul Huda Mahmood1Renato Abreu2Thomas Jacobsen3Klaus Pedersen4Istvan Z. Kovacs5Preben Mogensen6Department of Electronic Systems, Aalborg University, Aalborg, DenmarkDepartment of Electronic Systems, Aalborg University, Aalborg, DenmarkDepartment of Electronic Systems, Aalborg University, Aalborg, DenmarkDepartment of Electronic Systems, Aalborg University, Aalborg, DenmarkDepartment of Electronic Systems, Aalborg University, Aalborg, DenmarkNokia Bell Labs, Aalborg, DenmarkDepartment of Electronic Systems, Aalborg University, Aalborg, DenmarkUplink grant-free schemes have the promise of reducing the latency of a user-equipmentinitiated transmission by avoiding the handshaking procedure for acquiring a dedicated scheduling grant. However, the possibility of successfully delivering a payload within a latency constraint may be severely compromised in case of grant-free operations over shared radio resources. In this paper, we study the performance of two different uplink grant-free schemes over shared resources recently discussed within the fifth generation new radio standardization, namely, a solution based on a stop-and-wait (SAW) protocol and a blind retransmission approach. Performance is evaluated assuming Rayleigh fading channels with a maximum ratio combining (MRC) multi-antenna receiver. Analytical results show the benefits of grant-free transmission with respect to the traditional grant-based approach for a tight latency constraint. A highorder receive diversity is beneficial to leverage the MRC gain and enables the possibility of achieving the 10-5 outage probability target set for ultra-reliable low-latency communication services. The blind retransmission approach is significantly penalized by identification and signaling errors, while a SAW solution with potentially scheduled retransmissions out of the shared bandwidth leads to the lowest outage probability, at least for frequent packet arrivals.https://ieeexplore.ieee.org/document/8340053/Multiple accessgrant-free transmissionURLLC |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Gilberto Berardinelli Nurul Huda Mahmood Renato Abreu Thomas Jacobsen Klaus Pedersen Istvan Z. Kovacs Preben Mogensen |
spellingShingle |
Gilberto Berardinelli Nurul Huda Mahmood Renato Abreu Thomas Jacobsen Klaus Pedersen Istvan Z. Kovacs Preben Mogensen Reliability Analysis of Uplink Grant-Free Transmission Over Shared Resources IEEE Access Multiple access grant-free transmission URLLC |
author_facet |
Gilberto Berardinelli Nurul Huda Mahmood Renato Abreu Thomas Jacobsen Klaus Pedersen Istvan Z. Kovacs Preben Mogensen |
author_sort |
Gilberto Berardinelli |
title |
Reliability Analysis of Uplink Grant-Free Transmission Over Shared Resources |
title_short |
Reliability Analysis of Uplink Grant-Free Transmission Over Shared Resources |
title_full |
Reliability Analysis of Uplink Grant-Free Transmission Over Shared Resources |
title_fullStr |
Reliability Analysis of Uplink Grant-Free Transmission Over Shared Resources |
title_full_unstemmed |
Reliability Analysis of Uplink Grant-Free Transmission Over Shared Resources |
title_sort |
reliability analysis of uplink grant-free transmission over shared resources |
publisher |
IEEE |
series |
IEEE Access |
issn |
2169-3536 |
publishDate |
2018-01-01 |
description |
Uplink grant-free schemes have the promise of reducing the latency of a user-equipmentinitiated transmission by avoiding the handshaking procedure for acquiring a dedicated scheduling grant. However, the possibility of successfully delivering a payload within a latency constraint may be severely compromised in case of grant-free operations over shared radio resources. In this paper, we study the performance of two different uplink grant-free schemes over shared resources recently discussed within the fifth generation new radio standardization, namely, a solution based on a stop-and-wait (SAW) protocol and a blind retransmission approach. Performance is evaluated assuming Rayleigh fading channels with a maximum ratio combining (MRC) multi-antenna receiver. Analytical results show the benefits of grant-free transmission with respect to the traditional grant-based approach for a tight latency constraint. A highorder receive diversity is beneficial to leverage the MRC gain and enables the possibility of achieving the 10-5 outage probability target set for ultra-reliable low-latency communication services. The blind retransmission approach is significantly penalized by identification and signaling errors, while a SAW solution with potentially scheduled retransmissions out of the shared bandwidth leads to the lowest outage probability, at least for frequent packet arrivals. |
topic |
Multiple access grant-free transmission URLLC |
url |
https://ieeexplore.ieee.org/document/8340053/ |
work_keys_str_mv |
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