Massive machine-type communications (mMTC) is one of the main three focus areas in the
5th generation (5G) of wireless communications technologies to enable connectivity of a
massive number of Internet of things (IoT) devices with little or no human intervention. In
conventional human-type communications (HTC), due to the limited number of available
channel resources and orthogonal resource allocation techniques, users get a transmission
slot by making scheduling/connection requests. The involved control channel signaling …

Massive machine-type communications (mMTC) is one of the main three focus areas in the
5th generation (5G) of mobile standards to enable connectivity of a massive number of
internet of things (IoT) devices with little or no human intervention. In conventional human-
type communications (HTC), due to the limited number of available radio resources and
orthogonal/non-overlapping nature of existing resource allocation techniques, users need to
compete for connectivity through a random access (RA) process, which may turn into a …