LimeSDR GSM Base Station Demo

https://www.crowdsupply.com/lime-micro/limesdr/updates/gsm?utm_source=LimeSDR+supporters&utm_campaign=ea161a4144-Project_Update_Lime_GSM_6_18_2016&utm_medium=email&utm_term=0_1e5a81cd57-ea161a4144-112322449

by ChuckMcM • 10 years ago

84 27 10 years ago

crowdsupply.com

ChuckMcM2• 10 years ago

This is why I hope this gets funded, I would really like to understand the GSM protocols as deeply as these folks do.

teamster942• 10 years ago

This group of people are not the developers of the open-source GSM basestation stack they demod, funding them does not contribute to the OpenBTS. Fairwaves built a business trying to commercialize the readily available OpenBTS software stack, which was developed by Range Networks. Range split and the original author of OpenBTS, is the project maintainer behind YateBTS, which is a totally revamped version of OpenBTS with support in the works for LTE. So if you care about GSM, and LTE basestations go directly to the source http://yatebts.com

ChuckMcM2• 10 years ago

Thanks for the links, my concern is for having affordable hardware to run the stack on.

chemeris8• 10 years ago

CEO of Fairwaves here. Just want to slightly correct here. We indeed started with OpenBTS, but we switched to Osmocom years ago for a variety of reasons including better code quality and proper community development model. And while we're not the original authors of Osmocom either, we added SDR devices support to it, polished osmo-trx to a state it can be used in production, wrote first GPRS implementation, etc, etc. Right now Osmocom is a thriving community with several companies actively contributing, so it's moving faster than any other open-source GSM project out there. There will be more really exciting news about Osmocom soon - keep your eyes open. So if you want to go to the source - I suggest http://osmocom.org/projects for real open-source. Btw, no one stops you from using osmo-trx/LimeSDR with YateBTS if that's what you prefer. That's the beauty of choice open-source gives you.

dogma11386• 10 years ago

Just FYI working with GSM can be highly illegal in many places, especially without asking for and getting "permission" and then following the regulations regarding transmit power and shielding.

Please note that when you fuck with GSM you don't only screw around with your cellphone, you screw around with the guy or gal on the street calling 911, or with your upstairs elderly neighbour's emergency SOS/Telecare device, burglary alarms, fire alarm etc. so be very very careful in order not only to not get caught but to also not be an "asshat" on "blocking an ambulance" levels because you can easily just become that due to a mistake on your part.

nobodyshere• 10 years ago

Those SDR boards can't have that much power, can they? I mean, a usb powered radio rx/tx board running in your apartment can in no way seriously disrupt other peoples' communications.

jvermillard• 10 years ago

you can use coaxial cable if you are using it for testing or education. so you don't "pollute" the legit GSM communications.

zump• 10 years ago

Fairwaves?

chemeris8• 10 years ago

Yeah, we're not as well known as some of the more prominent SDRs out ther. We're mostly targeting professional users and have been mostly focused on figuring out how to get our tech into the real telecom world. Stay tuned - you will hear more about us, as we now have our system integrated into operators and have our hardware running in the real world.

chemeris8• 10 years ago

Here is a video of tests we're doing at installations with real operators - https://www.youtube.com/watch?v=mxpUXPy1htA (our equipment is almost invisible on the top of the tower, big racks and thick cables are existing infrastructure which was there)

Ebrahim24• 10 years ago

LimeSDR board is open source and the complete database is published on: https://github.com/myriadrf/LimeSDR-USB

walrus012• 10 years ago

Just a warning: If you mess around with ANY of this and:

a) don't have specific written permission from the FCC or Industry Canada (or your local spectrum regulator)

and/or

b) Don't do it in a good quality faraday cage

You deserve an FCC party van...

tostitos19792• 10 years ago

Can you change the transmission bands to the ISM ones or is it fixed to GSM bands? For a tinkers setup, the frequency shouldn't matter since you may not care about performance? Asking out of curiosity.

walrus012• 10 years ago

I suppose you could, on the SDR, but then no standard feature phone or smartphone would talk to it.

SSLy• 10 years ago

Is there any open source project that codes the "core" network elements of mobile neworks? BTS are just tip of the iceberg.

chemeris8• 10 years ago

Yes. Osmocom/OpenBSC actually started as an open-source "network in a box" which implements all critical GSM network elements in a single executable. It greatly expanded since then - check out a list of projects there. As I mentioned below, more companies are joining Osmocom and there will be hopefully more work on the core network side. Other open-source projects targeting core network elements are http://www.mobicents.org/ and http://www.projectclearwater.org/ (IMS).

LimeSDR GSM Base Station Demo

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