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Monday 6 July 2020
A Technical Introduction to 5G NR RRC Inactive State
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I looked at the RRC Inactive state back in 2017 , but the standards were not completely defined. In the meantime standards have evolved ...
3 comments:
Saturday 4 July 2020
An Introduction to Vehicle to Everything (V2X) and Cellular V2X (C-V2X)
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We made an introductory tutorial explaining vehicle to everything. There are 2 different favours of V2X as shown in this tweet below ...
Tuesday 30 June 2020
A Look into 5G Virtual/Open RAN - Part 6: Inter-gNB CU Handover involving Xn
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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...
1 comment:
Tuesday 23 June 2020
Comparison Layer 2 Measurements LTE vs. 5G NR
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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...
Monday 22 June 2020
Carrier Aggregation (CA) and Dual Connectivity (DC)
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This topic keeps coming up every few months with either someone asking me for clarifications or someone asking us to make a video. While...
Friday 12 June 2020
A Look into 5G Virtual/Open RAN - Part 5: Inter-gNB DU Handover
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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...
3 comments:
Tuesday 9 June 2020
5G Roaming with SEPP (Security Edge Protection Proxy)
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SEPP (Security Edge Protection Proxy) is part of the roaming security architecture as shown in the figure above. Ericsson's article ,...
Tuesday 2 June 2020
Embedded SIM (eSIM) and Integrated SIM (iSIM)
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It's been a while since I wrote detailed posts explaining UICC and SIM cards . Since then the SIM cards have evolved from Mini SIM to M...
1 comment:
Friday 29 May 2020
Visualisation of Intra-gNB Handover in an End-to-End Monitoring Tool
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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...
Tuesday 26 May 2020
The Journey from Communications Service Provider (CSP) to Digital Service Provider (DSP)
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Reliance Jio has recently been called as India's first digital service provider (DSP), but what exactly is a DSP and how does an exist...
Tuesday 19 May 2020
5G Dynamic Spectrum Sharing (DSS)
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5G Dynamic Spectrum Sharing is a hot topic. I have already been asked about multiple people for links on good resources / whitepapers. So h...
Thursday 14 May 2020
A Look into 5G Virtual/Open RAN - Part 4: Intra-gNB DU Handover
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In the previous posts of this series I described O-RAN interfaces and protocols , connection establishment and connection release procedur...
11 comments:
Monday 11 May 2020
5G Remote Surgery and Telehealth Solutions
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One of the most controversial 5G use cases is the remote surgery. In this post I want to quickly look at the history and what is possibl...
Thursday 7 May 2020
How the A6 Measurement Event triggers Secondary Cell Change in LTE Carrier Aggregation Calls
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Last week I read in Martin Sauter's blog about the LTE RRC A6 measurement event . Although I am quite interested in RRC measurements...
2 comments:
Wednesday 6 May 2020
Virve 2.0 - Finland's 4G/5G Public Safety Network
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State Security Networks Group Finland (Erillisverkot) safeguards the Finnish society by offering authorities and critical operators engaged...
Friday 1 May 2020
The Futuristic Concept of 'Smart & Intelligent' Batteries
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I did a presentation back in 2013 on the concept of smart batteries. Even though there has been a lot of progress in wireless charging ...
Tuesday 28 April 2020
Comparing S1AP and NGAP UE Context Release
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As an addition to my blog post about the 5G RAN Release procedure I would like to have an in-depth view at the details of NGAP UE Context...
1 comment:
Friday 24 April 2020
A Look into 5G Virtual/Open RAN - Part 3: Connection Release and Suspend
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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 ...
Monday 20 April 2020
A Look at the same RRC Message in LTE and 5G Stand-alone Call Scenarios
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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...
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