The 3G4G Blog

I have been asked about the UE Assistance Information  (UAI) RRC message a few times before. Generally I have always pointed people back to ...

One of the features that was introduced part of 5G NR 3GPP Release 17 is known as Small Data Transmission (SDT). When small amount of data, ...

One way all operators in a country/region/geographic area differentiate amongst themselves is by the reach of their network. It's not in...

I looked at Control and User Plane Separation (CUPS) in a tutorial, nearly five years back here . Since then most focus has been on 5G, not ...

In the previous blog post I have explained the concept of multi-band cells in LTE networks  and promised to explain a bit deeper how such ce...

When we made our 5G Service Based Architecture (SBA) tutorial some four years back, it was based on Release-15 of the 3GPP standards. All N...

Multi-band cells became very popular in modern RAN environment and beside many benefits they also come with some challenges for performance ...

In this video I explain how QoS Flows for VoNR are established and released especially on N2 reference point between 5G Core and NG RAN. The...

Today I launched a new video on my YouTube channel that explains how QoS Flows are established in 5G RAN and Core. It also highlights the ma...

In my last post I described how NG RAN resources can be divided into network slices.  Now I would like to show how these network slices and...

The data volume of UE Radio Capability Information defined in 3GPP 38.306 is already high and will further increase starting with Rel. 16 du...

Although a couple of SON mobility robustness features have been introduced in LTE radio networks it is still a common problem in some networ...

Earlier this year, MediaTek had announced that its MT2625 NB-IoT chip has been validated for LwM2M over NIDD on SoftBank Corp.’s cellular n...

In this video I explain the principles and signaling procedures related to the DAPS handover. The DAPS handover is a new feature for URLLC ...

GSMA recently published updated " 5G Implementation Guidelines: SA Option 2 ". It explains the two types of SMS in 5G, the sam...

The 3G4G page contains a lot of useful papers and links to security here  but we have also looked at evolution of security from 4G to 5G...

Mobile Initiated Connection Only (MICO) mode is designed for IoT devices that send small amounts of data and do not need to be paged. An...