Enhancing Performance of Uplink URLLC Systems via Shared Diversity Transmissions and Multiple Antenna Processing

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Abstrakt

In this work we investigate the reliability aspects of uplink multi-user MIMO communication over a preallocated pool of time-frequency resources shared by a group of ultra-reliable low-latency devices. To achieve sufficient diversity, users perform multiple transmissions of their packets over a shared pool of time-frequency resources in a non-orthogonal manner. The preallocation allows users to employ fast, grant-free type of access, while sharing improves the overall spectral efficiency. The multiple transmit opportunities enhance the robustness of communication through incremental redundancy. On the base station side, we consider the performance of a minimum mean square error (MMSE) receiver, chosen for its relative simplicity.
In addition to a baseline scheme in which devices randomly select the resources without coordination, we consider two other approaches based on preassigned access patterns: i) one in which all resources are utilized evenly and with equal power, and ii) another, where the spectrum is divided into high and low contention portions and users benefit from having few reliable transmissions and few diversity resources. In particular, we focus on evaluating the performance limits of the schemes as the number of antennas at the base station grows.
OriginalsprogEngelsk
Titel2019 53rd Asilomar Conference on Signals, Systems, and Computers
RedaktørerMichael B. Matthews
Antal sider7
UdgivelsesstedPacific Grove, CA, USA
ForlagIEEE
Publikationsdato30 mar. 2020
Sider1409-1415
Artikelnummer9049079
ISBN (Trykt)978-1-7281-4301-9
ISBN (Elektronisk)978-1-7281-4300-2
DOI
StatusUdgivet - 30 mar. 2020
Begivenhed2019 53rd Asilomar Conference on Signals, Systems, and Computers - Pacific Grove, USA
Varighed: 3 nov. 20196 nov. 2019

Konference

Konference2019 53rd Asilomar Conference on Signals, Systems, and Computers
LandUSA
ByPacific Grove
Periode03/11/201906/11/2019
NavnAsilomar Conference on Signals, Systems and Computers. Conference Record
ISSN1058-6393

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  • Citationsformater

    Kotaba, R., Manchon, C. N., & Popovski, P. (2020). Enhancing Performance of Uplink URLLC Systems via Shared Diversity Transmissions and Multiple Antenna Processing. I M. B. Matthews (red.), 2019 53rd Asilomar Conference on Signals, Systems, and Computers (s. 1409-1415). [9049079] IEEE. Asilomar Conference on Signals, Systems and Computers. Conference Record https://doi.org/10.1109/IEEECONF44664.2019.9049079