BWP Switching Mechanism in 5G SA and NSA

Hi Experts,

In 5G Standalone (SA) and Non-Standalone (NSA) modes, can a UE switch bandwidth parts (BWP) using DCI, or is an RRC Reconfiguration message always required for changing the BWP?

Thank you!

For BWP switching 3 methods can be used

  1. DCI based
  2. MAC CE
  3. RRC based

It depends upon implementation.

We have both timer-based BWP switching and RACH-based BWP switching mechanisms.

What is the RACH-based mechanism? Is it a new feature? I haven’t come across it before.

I believe he meant that after the RACH procedure, the BWP switches to the dedicated BWP.