SDR (Software Defined Radio) » gr-gsm » OsmocomBB SDR PHY

h1. Welcome to [[SDR PHY for OsmocomBB]] project

{{>toc}}

h2. Introduction

[[OsmocomBB:]] project provides almost free software GSM mobile station implementation, from Layer 2 to Layer 3. The last non-free parts are: layer 1 and low level signal processing that are implemented in a non-free DSP software which is inside of the hardware platform that [[OsmocomBB:]] is currently based on (mainly reverse engineered [[OsmocomBB:TI_Calypso_Chipset|Calypso]] based mobile phones).

The [[SDR PHY for OsmocomBB]] aims to replace these non-free parts through use Software Defined Radio devices and by creating missing software part for tasks such as scheduling, voice encoding/decoding, channel encoding/decoding, burst modulation/demodulation and controlling SDR hardware. In order to achieve this goal the [[SDR PHY for OsmocomBB]] brings together [[OsmocomBB:]] and [[gr-gsm:]] projects, where the role of [[gr-gsm:]] is to provide GSM bursts transmission and reception with everything starting from channel coding/decoding being done in [[OsmocomBB:]].

Having support for general purpose SDR hardware has additional advantage of not being locked to a single and already obsolete hardware platform. Adding support for a new well documented SDR platform is significantly easier than reverse-engineering mobile phone's hardware and software. This could sustain [[OsmocomBB:]] project's life even in the absence of hacked mobile phones it is able to run on.

A comparison of [[OsmocomBB:TI_Calypso_Chipset|Calypso]] based and SDR based approaches can be found on [[SDR PHY vs Calypso]] subpage.

h2. Overview

* [[Installation]]

** [[Docker images]]

* [[Supported SDR hardware]]

* [[SDR PHY vs Calypso]]

* [[Usage]]

h2. Project status

Please see: https://osmocom.org/projects/osmocom-bb-sdr-phy/roadmap

Known limitations (not implemented):

* Automatic PHY delay measurement

* AGC (Automatic Gain Control)

* Power measurement

* [[Supported SDR hardware|Works only with USRPs]]

Work in progress:

* GAPK based audio back-end

* Frequency Hopping

Future plans:

* Extend supported hardware list (Soapy?)

* PC/SC physical SIM interface

* AMR (Adaptive Multi-Rate)

h2. More info

h3. What to watch?

Demo (USRP B200, UmTRX, and Nokia 3310): https://youtu.be/nmqzr2-yF04

|_.Date|_.Event|_.Topic|_.Language|_.Speaker|_.Links|

|29.12.2017|34C3|Running GSM mobile phone on SDR|English|Vadim Yanitskiy, Piotr Krysik|https://media.ccc.de/v/34c3-8952-running_gsm_mobile_phone_on_sdr|

|15-16.05.2018|PHDays 2018|Turning SDR into a GSM mobile phone|Russian|Vadim Yanitskiy, Piotr Krysik|https://youtu.be/oju9Se1Xe50|

|07.06.2018|PT webinar|How to make a GSM mobile phone on SDR|Russian|Vadim Yanitskiy|https://www.ptsecurity.com/ru-ru/research/webinar/292562/|

h3. What to read?

|_.Topic|_.Author|_.Language|_.Links|

|How to assemble a GSM phone based on SDR|Vadim Yanitskiy|Russian|https://www.securitylab.ru/analytics/492169.php|

|How to assemble a GSM phone based on SDR|Vadim Yanitskiy|English|http://blog.ptsecurity.com/2018/03/how-to-assemble-gsm-phone-based-on-sdr.html|

h2. Sponsors

The "project":https://nlnet.nl/project/sdr-phy/ has support of NLnet Foundation

!https://osmocom.org/attachments/download/3315/nlnet_logo_320x120.png(fsdafs)!:https://nlnet.nl.