GSM Handset Emulation

GNU Radio
1

Now that there is a functional basestation available for GSM, I was
wondering if anyone is trying to build software for a GSM handset. This
way, I could use my laptop (e.g. in a manner similar to skype) to talk
with
folks when I don’t have a GSM phone handy.

2

Isaac G. wrote:

Now that there is a functional basestation available for GSM, I was
wondering if anyone is trying to build software for a GSM handset. This
way, I could use my laptop (e.g. in a manner similar to skype) to talk
with folks when I don’t have a GSM phone handy.

No one is working on it AFAIK but if you start I know a few folks that’d
be pretty happy :slight_smile:

Sylvain
3

Now that there is a functional basestation available for GSM, I was
wondering if anyone is trying to build software for a GSM handset. This
way, I could use my laptop (e.g. in a manner similar to skype) to talk with
folks when I don’t have a GSM phone handy.

It wouldn’t be very convenient, since you’d have to have a USRP, plus
antennas, dangling off your laptop.

GSM “handset” software could probably use a lot of the existing low
and medium level GSM basestation code. Having free implementations of
both sides of the interface would make debugging easier, too. But
there’d still be a lot of work involved. You’ll need a SIM card and
some way to read it, too. Sounds like a fun grad-student project to
me.

You could skip a lot of hassle with codecs and audio I/O and such
by first making something that would offer data service (e.g. SMS text
messages, or Internet access) by talking to a GSM basestation.

John

4

Hi,

On Thu, Nov 19, 2009 at 09:08, John G. [email protected] wrote:

both sides of the interface would make debugging easier, too. Â But
there’d still be a lot of work involved. Â You’ll need a SIM card and
some way to read it, too.

You can emulate SIM in software. No real need to have it in hardware.

 Sounds like a fun grad-student project to me.

Hum. It should be a very skilled grad-student.

You could skip a lot of hassle with codecs and audio I/O and such
by first making something that would offer data service (e.g. SMS text
messages, or Internet access) by talking to a GSM basestation.

As David B. suggested, GPRS is a separate huge task to implement,
because it share only small part with voice/sms services.

–
Regards,
Alexander C…