Multiple access technology played an important role in wireless communication in the last
decades: it increases the capacity of the channel and allows different users to access the …

Massive access, also known as massive connectivity or massive machine-type
communication (mMTC), is one of the main use cases of the fifth-generation (5G) and …

Multiple access technology plays an important role in communication systems, which can
enable different users to access the system efficiently and reliably. However, the …

5G wireless networks are expected to support new services with stringent requirements on
data rates, latency and reliability. One novel feature is the ability to serve a dense crowd of …

Massive machine-type communication (MTC) is expected to play a key role in supporting
Internet of Things (IoT) applications such as smart cities, smart factories, and connected …

The next generation of communication systems, which is commonly referred to as 5G, is
expected to support, besides the traditional voice and data services, new communication …

Rateless multiple access (RMA) is a novel non-orthogonal multiple access framework that is
promising for massive access in Internet of Things due to its high efficiency and low …

The envisioned sixth-generation (6G) of wireless communications is expected to give rise to
the necessity of connecting very large quantities of heterogeneous wireless devices, which …

In this article, some fundamental technical concepts of the main multiple access schemes for
wireless mobile systems are reviewed, and a path for the development of appropriate …

Massive MIMO based grant-free random access (mGFRA) is a promising RA technique for
massive access with low signaling overhead. However, due to a limited orthogonal …