Research Issues in Ultra-Reliable Low-Latency Communications in 5G Networks and Beyond

Abstract

Ultra-reliable low-latency Communications (URLLC) have emerged as a critical paradigm in 5G networks and beyond, enabling mission-critical applications with stringent requirements for ultra-low latency and high reliability. This paper provides an overview of research issues and challenges in URLLC, focusing on design considerations, emerging trends, and unresolved issues shaping the future of communication networks. Key research topics include dynamic resource allocation, interference management, protocol design, and cross-layer optimization strategies tailored for low-latency communication. We explore the influence of emerging technologies such as edge computing, artificial intelligence, and quantum communication on URLLC, highlighting opportunities for future research and innovation. There are identified gaps and unresolved issues, such as interference mitigation, security, and energy efficiency, are discussed, along with opportunities for cross-domain integration and standardization efforts. By addressing these challenges and exploring new research directions, URLLC can realize its potential to enable transformative applications and drive the evolution of communication networks towards ultra-reliable and low-latency connectivity.