Quite a number of 3G UMTS networks have been upgraded over the past year to HSDPA (High Speed Downlink Packet Access) which boosts data transmission rates from about 384 kbit/s to over 1 MBit/s in a first step. The second step of HSDPA, with data rates of over 3 MBit/s, has also gone life in … Continue reading 3.5G HSDPA in the US
All answers have been held as short as possible and require an understanding and study of the corresponding chapter of the book. Answer 1: The basic concept of the 5G Non-Standalone architecture is to add a 5G NR cell as a speed booster to an existing LTE radio and core network. It is different from … Continue reading 5G New Radio Q&A
It’s the time of the year again to reflect on what has happened in the last 12 months and looking back, I’m happy to say that it has been an eventful year again. So let’s jump right into it.
I live in Germany, and I’m used to the situation that the national regulator decided to only auction 300 MHz of the 400 MHz of spectrum available in the 3.5 GHz band (n78) back in 2019. As there were 4 applications, this meant that nobody could get the full 5G channel bandwidth of 100 MHz. … Continue reading Who’s Got the Most n78?
In an interesting post over at RCR Wireless, I noticed today that AT&T is about to shut-down their LTE NB-IoT network. And not only in a couple of years from now. No, the full shutdown is scheduled for Q1/2025. So surely there will be a new and shiny replacement technology in place? Hm, no, not … Continue reading AT&T Quits LTE NB-IoT
In the previous 3 parts of this series, I’ve had a look at the superb LTE/5G network coverage that has been installed in the tube in central London in 2024. One main question that had to remain unanswered at the time was how much capacity has actually been put into place. On one end of … Continue reading London Tube – LTE/NR 3.5 GHz Deployment – Part 4
In the past 3 posts I’ve had a high level look at the superb new London tube network coverage. With data rates of 500 Mbps without any special setup, it is nothing short of breathtaking. Unfortunately, the same can’t be said for other busy places in London.
Another day, another little trace session in the London tube when coming home from a event in the evening at 9 pm. In Part 2 of this series I’ve taken a look at one network operator’s LTE/5G coverage on London’s Central underground line and came away quite impressed. 5G NR n78 on the platforms with … Continue reading London Tube – LTE/NR 3.5 GHz Deployment – Part 3
When I was recently in London I was delighted to see that LTE/5G network coverage has finally come to first parts of the London tube. I didn’t have a lot of time or space to get my tracing equipment out, but I could nevertheless get a glimpse on some of the basic parameters on my … Continue reading London Tube – LTE/NR 3.5 GHz Deployment – Part 2
For the last 20 years, I’ve been wondering when mobile network coverage would finally come to the London tube. Together with Berlin, London was/is one of the last remaining major cities in Europe I have visited in recent years without decent mobile network coverage in underground public transportation. But it seems that the people who … Continue reading London Tube – LTE/NR 3.5 GHz Deployment – Part 1