Proceedings ArticleDOI
On the Achievable Rates over Collision-Prone Radio Resources with Linear Receivers
Gilberto Berardinelli,Renato Abreu,Thomas Jacobsen,Nurul Huda Mahmood,Klaus I. Pedersen,Istvan Z. Kovacs,Preben Mogensen +6 more
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TLDR
The relationship between target failure probability and saturation rate represents the maximum achievable rate over shared resources in the interference limited regime, and is derived from Maximum Ratio Combining and Minimum Mean Square Error receivers at the base station.Abstract:
In this paper, we discuss the achievable transmission rates over collision-prone radio resources shared by a number of devices, representative of novel Internet-of-Things (IoT) scenarios We consider Maximum Ratio Combining (MRC) and Minimum Mean Square Error (MMSE) receivers at the base station, and derive the relationship between target failure probability and saturation rate, which represents the maximum achievable rate over shared resources in the interference limited regime MRC receiver is shown to be sensitive to the presence of statistically relevant interferers operating over the same resources, rapidly leading to rate saturation The MMSE receiver adds a tier of protection to collisions thanks to its interference suppression capabilities, suffering for a rate penalty only in case of a high number of users A realistic system analysis in an indoor hotspot scenario validates the analytical trends and suggests insights on practical link adaptation strategiesread more
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Proceedings ArticleDOI
On the Multiplexing of Broadband Traffic and Grant-Free Ultra-Reliable Communication in Uplink
Renato Abreu,Thomas Jacobsen,Gilberto Berardinelli,Klaus I. Pedersen,Nurul Huda Mahmood,Istvan Z. Kovacs,Preben Mogensen +6 more
TL;DR: The analysis with 5G new radio assumptions shows that overlaying is mostly beneficial when SIC is employed in medium to high SNR scenarios or, in some cases, with low URLLC load, and the use of separate bands supports higher loads for both services simultaneously.
Journal ArticleDOI
Multi-cell Reception for Uplink Grant-Free Ultra-Reliable Low-Latency Communications
Thomas Jacobsen,Renato Abreu,Gilberto Berardinelli,Klaus I. Pedersen,Istvan Z. Kovacs,Preben Mogensen +5 more
TL;DR: It is observed that multi-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 is equipped with four receive antennas, depending on whether the retransmissions are enabled.
Radio Resource Management for Uplink Grant-Free Ultra-Reliable Low-Latency Communications
TL;DR: This thesis proposes RRM enhancements for uplink GF with the purpose of increasing the URLLC capacity while fulfilling the UR LLC service requirements and proposes a repetition-based scheme for this purpose.
References
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Theoretical reliability of MMSE linear diversity combining in Rayleigh-fading additive interference channels
H. Gao,Peter J. Smith,M.V. Clark +2 more
TL;DR: An exact closed-form solution for the reliability of an ideal M-branch MMSE (minimum mean-squared error) diversity combiner operating in a Rayleigh-fading channel with N interferers, each having some specified average power is derived.