This study proposes a set of novel random access protocols combining Packet Repetition
(PR) schemes, such as Contention Resolution Diversity Slotted Aloha (CRDSA) and …

Random access (RA) has recently been revisited and considered as a key technology for
the medium access control layer of the Internet of Things applications. Compared to other …

Random access algorithms are fundamental mechanisms for managing multiple
uncoordinated transmissions towards a common receiver. For such a scenario, which …

Non-orthogonal multiple access (NOMA) has been considered as a promising solution for
improving the spectrum efficiency of next-generation wireless networks. In this paper, the …

Being able to accommodate multiple simultaneous transmissions on a single channel, non-
orthogonal multiple access (NOMA) appears as an attractive solution to support massive …

This article analyzes the performance of a distributed joint power/packet diversity random
access scheme in the presence of energy requirements. In particular, the two main …

Modern random access avoids scheduling overheads and greatly improves the transmission
efficiency of small packets. The major challenge is the random collision, and slotted ALOHA …

Hybrid non-orthogonal multiple access (NOMA), which organically combines pure NOMA
and conventional OMA, has recently received significant attention to be a promising multiple …

The combination between non-orthogonal multiple access (NOMA) and hybrid automatic
repeat request (HARQ) is capable of realizing ultra-reliability, high throughput and massive …

Non-orthogonal multiple access (NOMA) is an efficient method for radio resource sharing
and has been identified as a promising technology in the fifth generation (5G) wireless …