A Primer on Bandwidth Parts in 5G New Radio

TL;DR

This paper explains the concept, configuration, and operation of bandwidth parts in 5G NR, highlighting their importance for flexible resource management in 5G networks.

Contribution

It provides a comprehensive overview of BWP fundamentals, configuration methods, switch mechanisms, and practical deployment considerations in 5G NR.

Findings

BWP enables flexible resource allocation in 5G NR.

Different BWP configuration methods support diverse deployment scenarios.

BWP switching mechanisms optimize network performance and user equipment capabilities.

Abstract

The fifth generation (5G) wireless access technology, known as New Radio (NR), features flexibility to support a variety of usage scenarios. One of the basic concepts in 5G NR is bandwidth part (BWP), which is, at a high level, a set of contiguous resource blocks configured inside a channel bandwidth. BWP spans across many 5G NR specifications developed by the 3rd Generation Partnership Project. Understanding how BWP operates is vital to understanding 5G NR. This article provides an overview of the essentials of BWP in the NR technical specifications. We describe fundamental BWP concepts, BWP configuration methods, and BWP switch mechanisms. We also discuss user equipment capabilities in terms of BWP support and share our thoughts on use cases of BWP for NR deployments.