[Discuss-gnuradio] Software mobile phone
Dear All, Do we think it is possible to create a software mobile phone using the USRP, with the OpenBTS code or something else? I mean everything would be in software, plus the USRP? Abdalaleem ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Software mobile phone
Dear All, Do we think it is possible to create a software mobile phone using the USRP, with the OpenBTS code or something else? I mean everything would be in software, plus the USRP? It is absolutely possible. So far I don't know anyone who has tried to do it. The OpenBTS code would give you a big head start. I also think it would be interesting to port the resulting code into a mobile phone. Generally the GSM protocols in a phone are run in a baseband processor separate from the user interface processor. Every phone I know of uses secret, proprietary code running in the baseband processor, even when the user interface is largely free software. Once you had working code running in GNU Radio on a Linux machine, the challenge would be finding a well-documented baseband chip (in which the manufacturer tells you where to find the radio I/O gear on the chip, and how it works, etc). Porting clean GSM code to run in that chip in realtime would require some adaptation to exploit unusual on-chip DSP hardware, mastering an embedded debugging environment, and perhaps shrinking the memory consumption of the GNU Radio-based code. I think it's not only doable, but well worth doing. It should be worth a couple of PhDs at least. You would certainly know the GSM protocols inside and out by the time you were done! John ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Software mobile phone
Hi, The OpenBTS code would give you a big head start. The tranceiver part sure. But you'd still need pretty big modification to have it act as a TDMA clock slave and not TDMA clock master (that's quite different). Once you have done the L1 inside the USRP somehow, you can re-use the osmocom-bb code (which is an opensource baseband implementation project) for the upper layers. Sylvain Munaut ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Openbts-discuss] [Discuss-gnuradio] Software mobile phone
Fantastic stuff! On 23 Jul 2010, at 22:26, Joshua Lackey wrote: And leveraging the work from the osmocombb project (http://bb.osmocom.org/trac/) will get you a far ways towards the goal. Quoting John Gilmore (g...@toad.com): Dear All, Do we think it is possible to create a software mobile phone using the USRP, with the OpenBTS code or something else? I mean everything would be in software, plus the USRP? It is absolutely possible. So far I don't know anyone who has tried to do it. The OpenBTS code would give you a big head start. I also think it would be interesting to port the resulting code into a mobile phone. Generally the GSM protocols in a phone are run in a baseband processor separate from the user interface processor. Every phone I know of uses secret, proprietary code running in the baseband processor, even when the user interface is largely free software. Once you had working code running in GNU Radio on a Linux machine, the challenge would be finding a well-documented baseband chip (in which the manufacturer tells you where to find the radio I/O gear on the chip, and how it works, etc). Porting clean GSM code to run in that chip in realtime would require some adaptation to exploit unusual on-chip DSP hardware, mastering an embedded debugging environment, and perhaps shrinking the memory consumption of the GNU Radio-based code. I think it's not only doable, but well worth doing. It should be worth a couple of PhDs at least. You would certainly know the GSM protocols inside and out by the time you were done! John -- This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first ___ Openbts-discuss mailing list openbts-disc...@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/openbts-discuss ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
