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5th generation (5G) systems have been designed with three main objectives inmind: increasing throughput, reducing latency, and enabling reliablecommunications. To meet these (often conflicting) constraints, the 3GPPreleased a set of specifications for 5G NR, one of the main innovations beingthe support for communications in the millimeter wave (mmWave) bands. However,how to implement lower complexity, energy efficient, mid-market Internet ofThings (IoT) applications is still an on-going investigation, currently led bythe 3GPP which is extending the NR standard with NR-Light specifications tosupport devices with reduced capabilities (REDCAP). While REDCAP devices mayalso operate at mmWaves to improve the network performance, hardware/softwaresimplifications are needed to support balanced and mixed requirements comparedto 5G NR systems. In this context, the contributions of this paper arethreefold. First, we present some NR-Light use cases for which the support ofthe mmWave bands is desirable. Second, we describe how 5G NR can be simplifiedto achieve NR-Light requirements and expectations. Finally, we evaluate viasimulation the performance of NR-Light devices operating at mmWaves in anindustrial IoT setup, in terms of cost and complexity, throughput, and latency.

5G NR-Light at Millimeter Waves: Design Guidelines for Mid-Market IoT Use Cases