WirelessMoves

One of the technology mysteries most people don’t really want to spend a second thought on is how the operating system of a PC is booted. When installing Linux next to Windows on the same disk, however, or when you plan to move a disk from one PC to another at some point, or when you want to restore a system image from a backup, it’s worth to understand at least the basics of the process to fix things in case something goes wrong. In a recent edition of the c’t magazine (see here, in German, article behind a paywall) there have been a number of great articles about the topic and here are my takeaways that will help me in the future.

Continue reading Booting With UEFI

There is a lot of media attention in Germany on the upcoming spectrum auction for 5G that is scheduled for early 2019. Like in previous rounds, spectrum is awarded via an auction to the highest bidders. Someone recently asked me if spectrum has always been auctioned so I had a look in my archive to find some details from days long gone.

Continue reading 5G Auctions – Let’s Look Back to 1989

Unknown to most people, web browsers such as Firefox have a sophisticated debugger built-in to look at everything from page load timings to HTTP header contents and Javascript debugging. For web developers this is a great help on the PC. Recently, I had to debug a web application that worked all right on the PC but wouldn’t quite work as intended when used on a tablet. So what’s the approach for debugging a web app on smartphones and tablets? I turns out that Firefox on Android on the PC have powerful ‘remote over Wifi’ debugging capabilities that are surprisingly simple to use.

Continue reading Javascript Debugging on the Tablet

And off we go straight into part two of my summary of things that moved me in 2018!:

Raising My Shields – Year 5

Ever since the Snowden revelations in 2013 I’ve been moving more and more services I use into my own domain and made sure as much of my Internet traffic as possible is encrypted. In 2018, I’ve made a number of significant improvements. First and foremost, Nextcloud Talk has become available and I’ve been using it since its launch for end to end encrypted and self-hosted voice and video calling. While it still continues to evolve for a more ubiquitous use from mobile devices, I used it a lot for voice and video calling from PCs in 2018.

Another weak point in my communication infrastructure has been internal email. While I made sure communication encrypted between clients and the external server, emails were obviously unencrypted while on the external server. So this year I took some time to finally put an email server in place at home for family internal emails that contain things that really shouldn’t be stored outside our domain of influence.

Continue reading Things That Moved Me in 2018 – Part 2

Another year is coming to an end again so it’s time once more to have a look at which things have moved me this year and how technology has moved forward, or not.

5G – 5G – 5G

If you visit this site every now and then you have probably noticed that 2018 has been the year I spent a significant amount of time going through the 3GPP 5G New Radio and 5G Core Network specification and have written more articles about it then I could possibly link in this post. Despite the flood of claims of 5G firsts and pseudo 5G network launches, the technology is still in the making. But that’s to be expected as 3GPP only released a first and very patchy version at the end of 2017. The people in 3GPP have taken everything apart from the radio to the core network and put it together again in a new fashion for fast and better future wireless connectivity that will keep us busy for years to come to put into practice. So here’s a link that will lead to all of my articles with ‘5G’ in it, from 2018 and other years. If you are interested if I already wrote about a specific topic, use the search box on the left.

Continue reading Things That Moved Me In 2018

In a previous post I referenced a paper of Keysight as a good starting point to understand how Active Antenna Systems (AAS) that have been specified for 3GPP 5G New Radio (NR) could improve overall capacity in a cell and extend the cell range. Today, I have found another interesting paper on the topic that was recently published by Ericsson.

Continue reading 5G Active Antenna Systems (AAS) Revisited

If you are interested in how a 5G EN-DC Option 3 connection is set-up between the mobile device and different components in the network the best but also the hardest way is to look up the procedures in a number of different 3GPP specifications. 3GPP TS 37.340 is a good starting point for EN-DC. Another interesting source that I have just discovered is over at EventHelix.com. On the page, there are a number of links to call flow diagrams that aggregate a lot of information from different 3GPP specs and to a blog post with some more details and a video at the end. Interesting stuff!

In the previous post I’ve been looking at Windows Subsystem For Linux (WSL) being a potential solution of how I could remotely administer and support a Windows box with tools and processes I use for supporting remote Linux machines. As it turned out this works great in practice. So how about using WSL and FOSS tools to do things locally on a Windows box with Linux tools for which there are no tools that I would rate as equivalent?

Continue reading Windows Subsystem For Linux – Part 2 – Graphical Stuff

While all PCs and notebooks I personally own run on Linux, I can still not totally escape Windows on other machines. Apart from not being FOSS, the other thing that bothers me when I have to use or support a Windows machine is that the tools and programs for local and remote maintenance and backup are entirely different. But perhaps there is hope now… In 2016, Microsoft announced what is now known as the ‘Windows Subsystem for Linux‘ or WSL for short, which emulates a Linux kernel API so Linux binaries can run on Windows as well. Kind of a reverse-Wine. So how well does this work and could I use this to remotely administer Windows boxes in the same way as Linux boxes?

Continue reading Windows Subsystem For Linux – Part 1 – Remote Stuff

Speaking about how much spectrum is needed by a network operator to make a difference with 5G, I had a closer look at how the German telco regulator wants to go forward with the auction of spectrum in the 3.6 GHz band. The spectrum auction is scheduled to take place in 2019 and the details about which part of the 3.6 GHz band shall be used for which purpose can be found in German here and in English here.

Continue reading 5G Spectrum For Germany – How Much For Whom?