Book Review – First Man

There’s quite a bit of a gap between this and the previous book review mainly due to the 50th anniversary of Apollo 11 in July that has kept me busy with re-reading a number of books I’ve had for many years and spending many hours with ApolloInRealtime. Anyway, the book review today, is a follow-up to this activity. Neil Armstrong certainly was an interesting and deeply inspiring person, so after watching the move ‘First Man’ on a plane to Chicago, I decided to pick up the book of the same title by James R. Hanson on which the movie was based.

Continue reading Book Review – First Man

Some Notes on Sprint’s 5G Network in Evanston

Image: Sprint 5G AdvertisementSprint has recently deployed 5G in the Chicago area and has put an impressive coverage map online. Needless to say that I had to go to a Sprint store to see if I could get a demo of their 5G network. My expectations where high because they did advertise 5G in their windows.

Continue reading Some Notes on Sprint’s 5G Network in Evanston

Cell Site Power Consumption

When I was recently asked what the power consumption of a typical cell site is I had general idea but decided to find out some more details and to set things into perspective. According to sources here and here, a typical 3 sector base station site with several LTE carriers on air draws anywhere between 2.5 to 10 kW of power. The main difference stems from whether the site is actively or passively cooled and how many carriers are used at the base station site. The higher number would also include sites with new 5G radios and activate antennas. So is this a lot or not?

Continue reading Cell Site Power Consumption

In Case Of Emergency – 10 Years Later

I really like 3GPP and standards. It’s a great thing and it has brought us devices that can communicate anywhere around the globe where a network is available. Unfortunately standardization of important features doesn’t work all the time. Take the ‘In Case of Emergency’ (ICE) functionality I wrote about 10 years ago as a prime example of industry failure to implement. In essence, 3GPP specified at the time, how emergency contact information should be stored in a mobile device, and in extension, the SIM card and they standardized how the retrieve the information. At the time I was a strong supporter of ICE as a recent personal experience has shown me the value of this.

Continue reading In Case Of Emergency – 10 Years Later

A Smartphone That Simultaneously Acts as Wifi Hotspot and Client

I think one of the biggest breakthroughs in wireless connectivity was, when looking at it from a smartphone point of view, when Android pioneered tethering, i.e. the possibility to share a cellular connection with other devices over Wifi. However, one thing that didn’t happen over the years was that a smartphone can be connected to a Wifi hotspot as a client, e.g. at a hotel, and then share this connection over Wifi with other devices instead of the cellular connection. By accident I found out that one of my devices is now actually able to do just that!

Continue reading A Smartphone That Simultaneously Acts as Wifi Hotspot and Client

Diving into Libreoffice Online – Thanks to Collabora

Two years ago I tested Collabora’s Libreoffice Online for the first time. While it looked promising, a number of important features I required were still missing such as spell checking, style modification, selection of modified text and style handling of foot notes. Recently I came back to see what progress they have made and came away quite impressed!

Continue reading Diving into Libreoffice Online – Thanks to Collabora

5G Myths And First Speed Test Results From the US

For some time I’ve been seriously considering to come up with some sort of filter that would just hide news articles with ‘5G’ in the title. The vast majority just talk about myths not founded in this reality or were just pure marketing hype for some esoteric function. It seems I am not the only one who’s getting tired of it. Fierce Wireless recently had an interesting post on the ‘4 myths that will hinder 5G growth‘. Have a look on their site for details, I totally agree with their points. Also interesting in their post are two links to first speed test reports.

Continue reading 5G Myths And First Speed Test Results From the US

Does LineageOS Have A Maintainer Crisis?

Ever since 2014, I’ve been using a custom ROM on my Android based devices as I value my privacy and and because I only consider myself owning a device if I have root rights on the OS. Back then, I used CyanogenMod, which, after a bit of a crisis with the commercial company behind it, morphed into LineageOS. And now it seems LineageOS in turn is in some sort of crisis as they have purged a significant part of their supported devices from their rooster, including very recent device models.

Continue reading Does LineageOS Have A Maintainer Crisis?

The State of Carrier Aggregation in Paris

Back in 2016 I noted on this site that one German network operator had by that time deployed 50 MHz worth of LTE in the center of Cologne where I live. I was impressed! Others have also not been idle since then and when I was in Paris recently, I noticed that Orange also has an impressive array of channels on air which can be used simultaneously by devices.

Continue reading The State of Carrier Aggregation in Paris