WirelessMoves

At the moment, most network operators scrambling to deploy 5G are doing so based on EN-DC (EUTRAN-New Radio – Dual Connectivity) which is also referred to as ‘Option 3’. As the longer abbreviation suggests, this way of deploying 5G uses the ‘legacy’ LTE radio network as a base and connects a 5G radio network alongside it. In fact, with Option 3, the ‘legacy’ LTE radio is in charge and the 5G radio network is merely used as a sort of side-kick to increase data rates. In the core network the LTE EPC, the LTE Evolved Packet Core, continues to be used with only minor changes that focus on controlling the higher data rates and which subscribers are allowed to use the 5G radio network side-kick. This is a nice setup to start with as it is backwards compatible and does not require any handovers between 4G and 5G when running out of 5G coverage. But it’s far from an ideal and pure 5G network that is envisaged in the future with a service oriented core network and a 5G radio network that stands on its own.

So how do we get to a pure 5G network in an orderly fashion that doesn’t break backwards compatibility for LTE-only devices and without unduly limiting the air interface capacity for LTE devices in the process? There is unfortunately not a single answer and not a single solution for all circumstances. In this and the following post I’ll have a look at what I think are the most likely migration scenarios over the coming decade and why.

Continue reading 5G Beyond Option 3 – Pt. 1

It’s 2019 and even Mozilla has abandoned reasonable support for discovering and using RSS feeds in their browser. Shame on them! But perhaps I’m a dinosaur and RSS really is a thing of the past? Not by far! When I count the list of web sites of people and organizations I follow in my RSS aggregator platform I run at home since 2013,  I come to the conclusion that this way of reading news is as strong as ever.

Continue reading RSS in 2018 – Thoughts on the Feeds in my Blogroll

When I want to test the data rates of networks I connect my PC to, I usually use wget to run a large file download from a public server to /dev/null. In the uplink I use an FTP server on the other side to push a file with randomized content. But actually, that is rather crude as there is a convenient tool available: iperf3

Continue reading Let’s Have Some IPerf Fun With 10 TB of Included Server Traffic

After having read a couple of classics lately, I decided to go for some contemporary science fiction for a change. For me that’s a rather difficult domain because most science fiction these days seems to by dystopian which I don’t really enjoy at all. So I select my science fiction carefully. One book I recently picked up is Sleeping Giants by Sylvain Neuvel, as the storyline sounded interesting and promised something other than a plain dystopian story.

Continue reading Book Review – Sleeping Giants

This post might be a bit out of the overall context but I thought it couldn’t hurt to loose a few words about a recent coding project of mine. As you might have noticed, I have put some of my open source projects on Gitlab after emigrating from Github last year (and moved on to Codeberg in September 2021). Most of the things there are quite particular and probably only interesting to few. Recently, however, I was looking for a way to generate Libreoffice Writer documents on the PHP based server part of a web application and thought that there must at least be half a dozen projects in public repositories with a solution for me. To my surprise it turned out that this was not the case, so I set out to put a library together on my own and open source it for others to benefit as well.

Continue reading Creating Libreoffice Documents on the Server with PHP

When I migrated from my Samsung S5 to an S9 smartphone last year I also made the significant step to run LineageOS without any Google Apps or frameworks on top. This has improved my privacy even further as the device does not talk to Google at all anymore now (*). The only major downside is that without the Google Play app, access to the standard app store is not possible per default. But there’s a fix for this!

Continue reading Yalp – Android Without the Play Store

As I travel a lot I kept a close eye on falling roaming costs over the years. On the one hand every price reduction offsets increasing volume requirements due to the continuing increase of website and document sizes. On the other hand, additional data volume for the same price as before gives me additional autonomy from local Wifi access that is often patchy and slow and allows me to do new and more data intensive things even while not at home. When I was recently in Dubai, I was glad to notice that my mobile network operator of choice has increased the amount of data I can get for €25 from 500 MB back in December 2018 to 1 GB in January 2019. In both cases, the data bucket was valid for up to a week and additional packages could be bought when running out of data earlier.

This nice increase also allowed me to add one more thing to my list of services I use while roaming outside the EU: VoWifi over LTE. Continue reading 25 Euros per Roaming Gigabyte Now and WB-AMR From Dubai

2D barcodes on mobile devices have been around even before the advent of 3G networks. The first time I mentioned the technology on my blog was in 2006 but for more than a decade, nothing much was done with the technology, at least not in Europe anyway. But now, 13 years later, I catch myself actually using them for a variety of things and I noticed how ideal they are to send digital information through space and time over quite unexpected channels.

Continue reading The Rise and Resurrection of the 2D Barcode – This Time For Real!

It’s sad to see history repeating itself. Back in 2012 one network operator in the US that, at the time, had not yet introduced LTE decided to just rebrand its dual carrier HSPA network into 4G. Done, a 4G network overnight out of thin air with a bit of a creative redesign of the network indicator logo on devices! Other operators were furious and looked for ways out. One operator that already had an LTE network decided to call it “Real LTE” in advertisements. Now that 5G networks are on the horizon, history repeats itself, at least in the US, the land of ‘creative’ marketing. Continue reading US Marketing Does It Again – 3G became 4G – Now 4G becomes 5G

About a year ago, Debian 8 ‘Jessie’, that was the basis for the main Raspberry Pi operating system (Raspbian) for quite some time, was nearing the end of its standard maintenance cycle. Debian would continue to supply security patches for this version but not for all CPU platforms. By that time, Raspbian had already moved to Debian 9 ‘Stretch’ but I still had quite a number of Raspberries running in several locations that would have been difficult to simply upgrade to Debian 9. So the question back then was if Raspbian based on Debian 8 would still be supported by the Debian long term support team!? At the time I was not sure because the ARM architecture of the Pi did not seem to be included. So where do we stand one year later?

Continue reading Raspbian Jessie Support One Year Later