Towards 6G Networks: A Comprehensive Review of Enabling Technologies, Challenges, and Future Research Directions

Abstract

The rapid evolution of wireless communication technologies has led to the emergence of sixth-generation (6G) networks, envisioned to surpass the capabilities of fifth-generation (5G) systems in terms of speed, latency, intelligence, and connectivity. This review paper provides a comprehensive analysis of 6G networks, focusing on enabling technologies, architectural innovations, key challenges, and future research directions. The study explores the integration of artificial intelligence, terahertz communication, quantum networking, intelligent surfaces, and advanced edge computing as foundational components of 6G systems. A systematic literature review is conducted to analyze recent advancements and identify research gaps. Furthermore, the paper highlights challenges related to spectrum utilization, security, energy efficiency, and standardization. The findings emphasize the need for interdisciplinary approaches and sustainable solutions to realize the full potential of 6G networks. This review serves as a valuable resource for researchers, engineers, and policymakers involved in next-generation communication systems.