What is 5G NR Bandwidth Part | Function of Bandwidth Part

This page mentions 5G NR Bandwidth Part basics including function of bandwidth part. The different use cases of bandwidth part in 5G NR standard are also mentioned.

The bandwidth part concept is introduced in the 5G NR in order to reduce power consumption of 5G NR devices. For this UE is active on wide bandwidth in bursty traffic situation for short time period and it will be active on narrow bandwidth for rest of the time duration. This is known as bandwidth adaptation.

A bandwidth part (BWP) is subset of contiguous RBs on a carrier. A bandwidth part is a subset of contiguous RBs on the carrier. Upto four bandwidth parts can be configured in the UE for each of the UL and DL, But at a given time, only one bandwidth part is active per transmission direction (either UL or DL). Due to BWP concept, UE can receive on narrow bandwidth part and when required network informs UE to switch on wider BW for reception.

5G NR Bandwidth Part

Use cases of Bandwidth part in 5G NR

5G NR Bandwidth Part Use Cases

• Carrier bandwidth part (BWP) is contiguous subset of PRBs (Physical Resource Blocks) defined for given 5G NR numerology on a given component carrier.
• One or multiple BWP configuration for each component carrier can be assigned to UE. But only one BWP in the downlink (DL) and one in the uplink (UL) is active at given time instant.
• Hence UE cannot transmit PUSCH or PUCCH and cannot receive PDSCH or PDCCH outside an active BWP.
• Configuration parameters for each BWP includes numerology, bandwidth size, frequency location and CORESET (Control Resource Set).

The different use cases of bandwidth part in 5G NR standard based devices are shown in the figure-2.
• (A)-Supports reduced UE bandwidth capability
• (B)-Supports reduced UE energy consumption
• (C)-Supports FDM of different numerologies
• (D)-Supports non-contiguous spectrum
• (E)-Supports forward compatibility

5G NR Numerology | 5G NR Terminology

5G NR Control channels | 5G NR Traffic Channels | 5G NR Reference Signals and sequences


What is Difference between

RF and Wireless Terminologies