PDCCH order in 5G NR
PDCCH order is one of the reasons for RACH trigger in both LTE and 5G-NR. If the network detects that there is DL Data to be sent to UE in its MAC Buffer and there is a UL synchronization issue…
5G MAC Layer
Beam Correspondence in 5G-NR
3GPP Defines Beam correspondence as to the ability of the UE to select a suitable beam for UL transmission based on DL measurements with or without relying on UL beam sweeping. The beam correspondence requirement is satisfied assuming the presence…
RACH Failure reasons in 5G-NR
RACH Failure can happen due to Multiple issues and there might be multiple reasons, I have listed down a list of RACH Failure reasons that can happen in 5G-NR. RACH process is a PHY/MAC Level procedure, but the RACH Configuration…
5G-NR RACH trigger reasons with details
There are certain conditions when UE needs to trigger RACH, even when it’s in RRC_CONNECTED mode. Below is the list of reasons when RACH Can be triggered in NSA and SA mode by a UE. NR RACH Trigger Reasons Initial…
How gNB decides to between CFRA and CBRA RACH procedure in NSA?
How gNB decides to between CFRA and CBRA RACH procedure in NSA? A friend of mine asked me the above question so I thought it’s useful that to share the discussion In 5G-NR RACH process is tied to the SSB…