Multi-cell Reception for Uplink Grant-Free Ultra-Reliable Low-Latency Communications

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Abstract

The fifth generation (5G) radio networks will support ultra-reliable low-latency communications (URLLC). In the uplink, the latency can be reduced by removing the time-consuming and error-prone scheduling procedure and instead use grant-free (GF) transmissions. Reaching the strict URLLC reliability requirements with GF transmissions is, however, particular challenging due to the wireless channel uncertainties and interference from other URLLC devices. As a consequence, the supported URLLC capacity and hence the spectral efficiency is therefore typically low. Multi-cell reception, i.e joint reception and combining by multiple base-stations (BS) is a technique known from Long Term Evolution (LTE), with the potential to greatly enhance the reliability. This paper propose the use of multi-cell reception to increase the URLLC spectral efficiency while satisfying the strict requirements using GF transmissions in a 5G new radio (NR) scenario. We evaluate the achievable URLLC capacity for an elaborate multi-cell reception parameter space and multi-cell combining techniques. Additionally, we demonstrate that rethinking of the radio resource management (RRM) in the presence of multi-cell reception is needed to unleash the full potential of multi-cell reception in the context of UL GF URLLC. It is observed that multi-cell reception compared to a single-cell reception, can provide URLLC capacity gains from 205% to 440% when the BSs are equipped with two receive antennas and 53% to 22% when BSs are equipped with four receive antennas, depending on whether retransmissions are enabled.
Original languageEnglish
JournalIEEE Access
Volume7
Pages (from-to)80208-80218
Number of pages11
ISSN2169-3536
DOIs
Publication statusPublished - Jul 2019

Cite this

@article{72b5b9ca96314f319b535bf66d5cc254,
title = "Multi-cell Reception for Uplink Grant-Free Ultra-Reliable Low-Latency Communications",
abstract = "The fifth generation (5G) radio networks will support ultra-reliable low-latency communications (URLLC). In the uplink, the latency can be reduced by removing the time-consuming and error-prone scheduling procedure and instead use grant-free (GF) transmissions. Reaching the strict URLLC reliability requirements with GF transmissions is, however, particular challenging due to the wireless channel uncertainties and interference from other URLLC devices. As a consequence, the supported URLLC capacity and hence the spectral efficiency is therefore typically low. Multi-cell reception, i.e joint reception and combining by multiple base-stations (BS) is a technique known from Long Term Evolution (LTE), with the potential to greatly enhance the reliability. This paper propose the use of multi-cell reception to increase the URLLC spectral efficiency while satisfying the strict requirements using GF transmissions in a 5G new radio (NR) scenario. We evaluate the achievable URLLC capacity for an elaborate multi-cell reception parameter space and multi-cell combining techniques. Additionally, we demonstrate that rethinking of the radio resource management (RRM) in the presence of multi-cell reception is needed to unleash the full potential of multi-cell reception in the context of UL GF URLLC. It is observed that multi-cell reception compared to a single-cell reception, can provide URLLC capacity gains from 205{\%} to 440{\%} when the BSs are equipped with two receive antennas and 53{\%} to 22{\%} when BSs are equipped with four receive antennas, depending on whether retransmissions are enabled.",
author = "Jacobsen, {Thomas Haaning} and Abreu, {Renato Barbosa} and Gilberto Berardinelli and Pedersen, {Klaus Ingemann} and Istvan Kov{\'a}cs and {E. Mogensen}, Preben",
year = "2019",
month = "7",
doi = "10.1109/ACCESS.2019.2923324",
language = "English",
volume = "7",
pages = "80208--80218",
journal = "IEEE Access",
issn = "2169-3536",
publisher = "IEEE",

}

Multi-cell Reception for Uplink Grant-Free Ultra-Reliable Low-Latency Communications. / Jacobsen, Thomas Haaning; Abreu, Renato Barbosa; Berardinelli, Gilberto; Pedersen, Klaus Ingemann; Kovács, Istvan; E. Mogensen, Preben.

In: IEEE Access, Vol. 7, 07.2019, p. 80208-80218.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Multi-cell Reception for Uplink Grant-Free Ultra-Reliable Low-Latency Communications

AU - Jacobsen, Thomas Haaning

AU - Abreu, Renato Barbosa

AU - Berardinelli, Gilberto

AU - Pedersen, Klaus Ingemann

AU - Kovács, Istvan

AU - E. Mogensen, Preben

PY - 2019/7

Y1 - 2019/7

N2 - The fifth generation (5G) radio networks will support ultra-reliable low-latency communications (URLLC). In the uplink, the latency can be reduced by removing the time-consuming and error-prone scheduling procedure and instead use grant-free (GF) transmissions. Reaching the strict URLLC reliability requirements with GF transmissions is, however, particular challenging due to the wireless channel uncertainties and interference from other URLLC devices. As a consequence, the supported URLLC capacity and hence the spectral efficiency is therefore typically low. Multi-cell reception, i.e joint reception and combining by multiple base-stations (BS) is a technique known from Long Term Evolution (LTE), with the potential to greatly enhance the reliability. This paper propose the use of multi-cell reception to increase the URLLC spectral efficiency while satisfying the strict requirements using GF transmissions in a 5G new radio (NR) scenario. We evaluate the achievable URLLC capacity for an elaborate multi-cell reception parameter space and multi-cell combining techniques. Additionally, we demonstrate that rethinking of the radio resource management (RRM) in the presence of multi-cell reception is needed to unleash the full potential of multi-cell reception in the context of UL GF URLLC. It is observed that multi-cell reception compared to a single-cell reception, can provide URLLC capacity gains from 205% to 440% when the BSs are equipped with two receive antennas and 53% to 22% when BSs are equipped with four receive antennas, depending on whether retransmissions are enabled.

AB - The fifth generation (5G) radio networks will support ultra-reliable low-latency communications (URLLC). In the uplink, the latency can be reduced by removing the time-consuming and error-prone scheduling procedure and instead use grant-free (GF) transmissions. Reaching the strict URLLC reliability requirements with GF transmissions is, however, particular challenging due to the wireless channel uncertainties and interference from other URLLC devices. As a consequence, the supported URLLC capacity and hence the spectral efficiency is therefore typically low. Multi-cell reception, i.e joint reception and combining by multiple base-stations (BS) is a technique known from Long Term Evolution (LTE), with the potential to greatly enhance the reliability. This paper propose the use of multi-cell reception to increase the URLLC spectral efficiency while satisfying the strict requirements using GF transmissions in a 5G new radio (NR) scenario. We evaluate the achievable URLLC capacity for an elaborate multi-cell reception parameter space and multi-cell combining techniques. Additionally, we demonstrate that rethinking of the radio resource management (RRM) in the presence of multi-cell reception is needed to unleash the full potential of multi-cell reception in the context of UL GF URLLC. It is observed that multi-cell reception compared to a single-cell reception, can provide URLLC capacity gains from 205% to 440% when the BSs are equipped with two receive antennas and 53% to 22% when BSs are equipped with four receive antennas, depending on whether retransmissions are enabled.

U2 - 10.1109/ACCESS.2019.2923324

DO - 10.1109/ACCESS.2019.2923324

M3 - Journal article

VL - 7

SP - 80208

EP - 80218

JO - IEEE Access

JF - IEEE Access

SN - 2169-3536

ER -