  Internet of Things is one of the most promising technology of the
fifth-generation (5G) mobile broadband systems. Data-driven wireless services
of 5G systems require unprecedented capacity and availability. The
millimeter-wave based wireless communication technologies are expected to play
an essential role in future 5G systems. In this article, we describe the three
broad categories of fifth-generation services, viz., enhanced mobile broadband,
ultra-reliable and low-latency communications, and massive machine-type
communications. Furthermore, we introduce the potential issues of consumer
devices under a unifying 5G framework. We provide the state-of-the-art overview
with an emphasis on technical challenges when applying millimeter-wave (mmWave)
technology to support the massive Internet of Things applications. Our
discussion highlights the challenges and solutions, particularly for
communication/computation requirements in consumer devices under the
millimeter-wave 5G framework.
