The 3G4G Blog

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...

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...

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

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...

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

This will be the last part of my series about Virtual/Open RAN signaling procedures. In this final post (although not the last one on this ...

I looked at the RRC Inactive state back in 2017 , but the standards were not completely defined. In the meantime standards have evolved ...

We made an introductory tutorial explaining vehicle to everything. There are 2 different favours of V2X as shown in this tweet below ...

In previous blog posts I have discussed intra-gNB-DU handover and inter-gNB-DU handover scenarios.Now it is time to look at inter-gNB-CU...

Yesterday (2020-06-22) 3GPP uploaded the version 1.0 of TS 38.314 "Layer 2 Measurements" for 5G New Radio Rel. 16. I was wonde...

My last blog post discussed the intra-gNB-DU handover . Now it is time to look at inter-gNB-DU handover. This means: the target cell is loc...

In my last blog post I described the message flow of an intra-gNB-DU handover. Today I want show how such a handover can be visualized u...

In the previous posts of this series I described O-RAN interfaces and protocols , connection establishment and connection release procedur...

Last week I read in Martin Sauter's blog about the LTE RRC A6 measurement event . Although I am quite interested in RRC measurements...

The 3rd post of this series introduces the details of connection release in the 5G RAN. Indeed, we find most of the release causes known ...

Some weeks ago the differences in 4G LTE RRC (3GPP 36.331) and 5G NR RRC (3GPP 38.331) and how both protocols interact in EN-DC call scena...

The Austrian company Invenium Data Insights GmbH has partnered with the mobile network operator A1 to analyze and visualize subscriber mobi...

Last week I had a fruitful discussion with a fellow blogger on the web, Martin Sauter (@mobilesociety) regarding a post in which he compare...