5G MAC Layer

5G NR Cell Scan and RACH Procedure Poster

Introducing a comprehensive poster detailing the 5G NR Cell Scan Procedure and RACH Procedure. This visual guide offers a step-by-step overview of how UE initiate’s the cell scan procedure upon powering on, delving into the intricacies of 5G cell scanning.…

Idle Mode DRX in 5G NR

Discontinuous Reception (DRX) is a power-saving feature designed to extend the battery life of mobile devices. It achieves this by allowing the device to switch off its radio receiver when not expecting network communication, thus reducing power consumption significantly. DRX…

SCHEDULING REQUEST

Scheduling Request in 5G-NR

The concept of Scheduling request is same for LTE and 5G NR. Scheduling request is way for UE to tell the network that it has some data in its MAC buffer and it needs PHY resources in Uplink to send…

PDCCH ORDER 5gnr

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…

Beam Correspondence

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…

Reasons for RACH Failure

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

5G-NR RACH trigger reasons with details

In the intricate world of 5G networks, the Random Access Channel (RACH) serves as a vital gateway for User Equipment (UE) to establish initial communication with the network. While RACH is commonly associated with UE transitions from idle mode to…

5G-NR RACH Trigger reasons

RACH Decision-Making: How gNB Chooses CFRA or CBRA

In the 5G-NR RACH process, the gNB’s ability to configure Contention Free RACH to UE hinges on transmitting specific dedicated information. This includes the SSB index, PRACH Preamble, and RACH Occasion. For CFRA RACH to be initiated, the network must…