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måndag 8 maj 2017

What should 6G be and what 5G will be

Now days everyone except Ericsson and Huawei (and some others that depend on the success) admit that 5G will not be very exciting. Only offering slightly more of the same thing as today. But it will now revolutionize the way we live in the same way as LTE did (oh but it did!).
My prediction: 5G will be like 3G, a system developed that does not quite fit the needs. Thus, there are much bigger chances with 6G, or perhaps 5.5G. (These generations are really quite silly to talk about anyway since it is much more of a continuous evolution)
However, there is still a bright future for communication. And the application is... *drums*... Augmented/Virtual/Mixed Reality. That is what will shape the future. And the world will be ready around 5.3G. Then it will be clear what 5G should have been, and we can correct it with 6G.

One key function that will be the most interesting one is local data sources. That is, the system will have to be able to fetch large quantities of data that is produced very locally (within meters).

söndag 3 januari 2016

I just learned about the dining philosophers problem...

The dining philosophers problem is an interesting one, invented by Dijkstra, and important in multi-threaded programming. I read the Wikipedia article and some others on the subject, and noted that the problem is very similar to what is faced in a wireless communication scenario where several clients needs a way to share the channel.
In communication the problem seem to have been solved in some other ways that in programming. E.g. Cellular systems usually employ a scheduler. 802.11 instead uses CSMA/CA. It is interesting to note that the communication system problem description actually is closes to the original problem formulation by Dijkstra where he considered shared access to a tape recorder system.
It would be very interesting to investigate how the computer science solutions perform in a wireless scenario, and vice versa, how would the wireless (and wired, e.g. Ethernet) solutions perform in concurrent programming scenarios.
I will have to get back on that.

fredag 25 september 2015

Why are we still using Bluetooth?!

I have never used a pair of Bluetooth devices that works flawlessly. The latest addition to the set, is my new Windows 8/ASUS laptop which simply refuses to find my Sony Bluetooth headset.

Whys is this, and why is there no improvement. I have been frustrated with this now for 10 years, and the same issues still persist. What is the wireless community planning to do about this?