Six Critical Challenges for 6G Wireless Systems

TL;DR

This paper identifies six fundamental challenges for 6G wireless systems, including spectrum, hardware, transceiver design, latency, and backward compatibility, and discusses potential practical solutions for each.

Contribution

It systematically outlines the key technical hurdles for 6G development and proposes initial approaches to address these challenges.

Findings

Sub-terahertz spectrum opening is crucial for 6G bandwidths.

Semiconductor technology must push limits for sub-THz operation.

Achieving sub-millisecond latency is essential for 6G performance.

Abstract

A large number of papers are now appearing on sixth-generation (6G) wireless systems, covering different aspects, ranging from vision, architecture, applications, and technology breakthroughs. With cellular systems in mind, this paper presents six critical, yet fundamental challenges that must be overcome before development and deployment of 6G systems. These include: Opening the sub-terahertz (sub-THz) spectrum for increased bandwidths and the ability to utilize these bandwidths, pushing the limits of semiconductor technologies for operation within the sub-THz bands, transceiver design and architectures to realize the high peak data rates, and realizations of sub-millisecond latencies at the network-level to achieve the 6G key performance indicators. Additionally, since 6G systems will not be introduced in a green fields environment, backwards compatibility with existing systems is discussed. Where possible, we present practical solutions to realize the identified challenges.