From laforge at gnumonks.org  Thu May 12 18:09:37 2011
From: laforge at gnumonks.org (Harald Welte)
Date: Thu, 12 May 2011 20:09:37 +0200
Subject: Planning for Radio Village at 2011 CCC Camp
Message-ID: <20110512180936.GA25011@prithivi.gnumonks.org>

Hi all!

[This message is cross-posted to many lists, please be careful when
 replying to it! Think twice if your respones really matters to all
 those projects...]

In order to do some better planning for our Camp activities this summer,
I would like to request all people who intend to participate in the
radio village to add themselves to the wiki:

https://events.ccc.de/camp/2011/wiki/index.php/RadioVillage

The list of citizens is auto-generated if you use Person template like
I have done in my user page at
https://events.ccc.de/camp/2011/wiki/index.php/User:LaForge

The large main tent is not really intended as a place to sleep, but more
like a place where we set up our gear and work on the various projects,
similar to what happened at HAR.

Thanks in advance!
-- 
- Harald Welte <laforge at gnumonks.org>           http://laforge.gnumonks.org/
============================================================================
"Privacy in residential applications is a desirable marketing option."
                                                  (ETSI EN 300 175-7 Ch. A6)
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From hwelte at sysmocom.de  Fri May 13 16:39:18 2011
From: hwelte at sysmocom.de (Harald Welte)
Date: Fri, 13 May 2011 18:39:18 +0200
Subject: Osmocom project vs. sysmocom GmbH
Message-ID: <20110513163918.GU25011@prithivi.gnumonks.org>

Hi all!

As some of you already know, Holger and I have recently started a new
company called "sysmocom - systems for mobile communications GmbH".
The process of establishing the new company has now formally concluded.

Before some rumours start to spread, we would like to clarify some
points and make sure there is mutual understanding between the Osmocom
community and the sysmocom company.

sysmocom is intended to provide commercial offerings related to the
Osmocom projects.  This is not entirely new.  Especially on the network
side, people like Holger and I have been doing quite a lot of paid
development to bring those projects forward.  We would not have many of
the features we have today, if it wasn't for customers who actually pay
us for development of OpenBSC, OsmoBSC, OsmoSGSN and the various side
projects more targetted at a real network operator like cellmgr-ng,
bsc-nat, gb_proxy - just to name a few.

However, this has always only been freelancing development of Software.

With sysmocom, we want to go one step further and work on hardware
products related to the various Free Software projects.  Right now I
don't want to talk too much about unfinished products, but we are
working towards an inexpensive BTS product, we are funding the
prototypes for Osmocom SIMtrace, and we will likely also see stuff like
OpenBSC appliances.

Given our past involvement and exposure into other projects that share
a split Free Software / business set-up, we think we understand very
well where potential issues of conflict between the two sides may be.

Let me make some more clarification what this is not about:

* sysmocom is not about creating proprietary derivates of Osmocom
  software.  We work on Free Software which is publicly available under
  OSI approved and FSF endorsed licenses.  We may offer proprietary
  hardware and sometimes software - but those are independent projects
  from existing Osmocom software.

* we specifically will not have a public and a non-public version of
  the same program with differences in features.

* sysmocom is not a VC-funded startup.  It's a very small company
  run out of personal funds with no intention to take external funding
  or grow rapidly.  Nobody but Holger and I determine where it goes
  and what it does.

* sysmocom does not hold any copyright on the Free Software projects.
  The copyrights stay distributed with the major authors such as Holger,
  Onwaves, Sylvain, Dieter, Andreas and myself.  None of the others have
  any affiliation with sysmocom.  I have (personally, unrelated to
  sysmocom) asked some of the smaller contributors for a copyright
  transfer to make sure we could do the AGPLv3 transition, or future
  re-licensing decisions without having to ask dozens and dozens of
  people.  sysmocom does not seek to control the Free Software projects.

* we will maintain a strict separation between the community side of
  things and the business side.  Unlike some other popular projects, we
  will not end up in a situation where the osmocom.org websites will be
  full of advertisements and hidden links that lure you on the company
  website.

* we will keep a strict separation of naming.  Osmocom is for the FOSS
  projects, sysmocom for the business.  The company will use the term
  "Osmocom" only in descriptive context, not as a product name, brand
  or for advertisement.

If you do have any concerns, please feel free to share them.  However,
I'd like to avoid cross-posting them throguh different mailing lists.
Please follow-up-to openbsc at lists.osmocom.org

Regards,
	Harald
-- 
- Harald Welte <hwelte at sysmocom.de>             http://www.sysmocom.de/
=======================================================================
* sysmocom - systems for mobile communications GmbH
* Schivelbeiner Str. 5
* 10439 Berlin, Germany
* Sitz / Registered office: Berlin, HRB 134158 B
* Geschaeftsfuehrer / Managing Directors: Holger Freyther, Harald Welte
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From laforge at gnumonks.org  Sun May 22 19:46:10 2011
From: laforge at gnumonks.org (Harald Welte)
Date: Sun, 22 May 2011 21:46:10 +0200
Subject: GSMTAP now creates a locally bound receive socket
Message-ID: <20110522194610.GW4243@prithivi.gnumonks.org>

Hi!

libosmocore >= 0.3.1 and the current osmo-tetra code will now generate
not only the sending GSMTAP UDP socket, but also a locally-bound receive
socket. 

This avoids the manual start of "nc -l -u -p 4729 >/dev/null" or
iptables rules to drop the UDP packets.

The local receive socket is only created if the GSMTAP IP address is a
locally configured address on any of your network interfaces.  So
sending it to 127.0.0.1 should work well.

Don't be surprised if you happen to see GSMTAP over IPv6, I'm now using
getaddrinfo() and related functions, i.e. "loopback" may now resolve to
::1 instead of 127.0.0.1

Regards,
	Harald
-- 
- Harald Welte <laforge at gnumonks.org>           http://laforge.gnumonks.org/
============================================================================
"Privacy in residential applications is a desirable marketing option."
                                                  (ETSI EN 300 175-7 Ch. A6)



From zielonka.markus at yahoo.de  Tue May 24 20:00:46 2011
From: zielonka.markus at yahoo.de (Markus Zielonka)
Date: Tue, 24 May 2011 22:00:46 +0200
Subject: Suche Informationen zu Funcube und dem py Script
Message-ID: <BFEC5A55-5EC2-43D4-8736-A1B66F378452@yahoo.de>

Hallo Tetra Liste,

m?chte nicht unh?flich sein, im Archiv habe ich zum Thema Funcube und dem py Script nichts gefunden. Wer kann mir mehr Informationen geben? Gibt es ein extra Wiki oder einen Blogbeitrag? Screenshots? 

Suche mehr Informationen wie ich den Funcube mit dem Script auf einem Ubuntu System einsetze. Danke.

Gru? Markus


From laforge at gnumonks.org  Wed May 25 06:57:13 2011
From: laforge at gnumonks.org (Harald Welte)
Date: Wed, 25 May 2011 08:57:13 +0200
Subject: experience with fcdp
Message-ID: <20110525065713.GD24513@prithivi.gnumonks.org>

Hi!

I've borrowed a Funcube Dongle Pro and tried to use it with
osmocom-tetra.  I've manually tuned it to a tetra carrier using the
Qt-GUI, and it I can see the carrier very clearly in the spectrum/fft.
However, I'm getting many more bit errors than with a USRP2+WBX board.
Also, I have the feeling that the WBX has a much higher sensitivity,
even with the FCDP input LNA at 30dB maxed out. 

Can anyone confirm these findings?

I'll do some more investigation and report back here.

Regards,
	Harald
-- 
- Harald Welte <laforge at gnumonks.org>           http://laforge.gnumonks.org/
============================================================================
"Privacy in residential applications is a desirable marketing option."
                                                  (ETSI EN 300 175-7 Ch. A6)



From cd at maintech.de  Wed May 25 08:00:33 2011
From: cd at maintech.de (Christian Daniel -- maintech GmbH)
Date: Wed, 25 May 2011 10:00:33 +0200
Subject: experience with fcdp
In-Reply-To: <20110525065713.GD24513@prithivi.gnumonks.org>
References: <20110525065713.GD24513@prithivi.gnumonks.org>
Message-ID: <4DDCB721.9010703@maintech.de>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hi Harald,

I have no Funcube, but from the design of it I would rather assume, that
it is a matter of strong signal immunity. The WBX has a lot of built in
analog filters whereas the Funcube has none. If several other carriers
are in the vicinity (within several MHz of the targeted signal), all
these add to noise in the channel.

You might try a filter between antenna and Funcube or try to use an
antenna that is only sensitive in a small part of the Tetra band. Do not
use one of these DVB-T mini antennas that come with the USB sticks.
These are optimized for covering the whole TV band. This includes Tetra
but also everyting else :/

Just my .02 - and speculation as well...

Best regards,
Christian

On 25.05.2011 08:57, Harald Welte wrote:
> Hi!
> 
> I've borrowed a Funcube Dongle Pro and tried to use it with
> osmocom-tetra.  I've manually tuned it to a tetra carrier using the
> Qt-GUI, and it I can see the carrier very clearly in the spectrum/fft.
> However, I'm getting many more bit errors than with a USRP2+WBX board.
> Also, I have the feeling that the WBX has a much higher sensitivity,
> even with the FCDP input LNA at 30dB maxed out. 
> 
> Can anyone confirm these findings?
> 
> I'll do some more investigation and report back here.
> 
> Regards,
> 	Harald

- -- 
- ---------------------------------------------------
| maintech #      Dipl. Inf (FH) Christian Daniel |
|   GmbH ### Otto-Hahn-Str. 15 ? D-97204 H?chberg |
- ---------------------------------------------------
| AG W?rzburg, HRB 8790        Tax-ID DE242279645 |
- ---------------------------------------------------
| http://www.maintech.de           cd at maintech.de |
- ---------------------------------------------------
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From horiz0n at gmx.net  Wed May 25 22:27:13 2011
From: horiz0n at gmx.net (Dimitri Stolnikov)
Date: Thu, 26 May 2011 00:27:13 +0200
Subject: experience with fcdp
In-Reply-To: <20110525065713.GD24513@prithivi.gnumonks.org>
References: <20110525065713.GD24513@prithivi.gnumonks.org>
Message-ID: <op.vv15zn1lvay7ep@localhost.localdomain>

Hi,

 from my observations the dongle is about 10 dB worse in terms of dynamic
range than the WBX (measured the same carrier on the same (wideband)
antenna, WBX gain 0, FCDP all gains at their lowest values). Raising of
any of the FCDP's gains leads to signal shape degradation with my setup.

Demodulation seem to work fine here with an SNR of around 40 dB.


Best regards,

Dimitri



From laforge at gnumonks.org  Sun May 29 16:16:11 2011
From: laforge at gnumonks.org (Harald Welte)
Date: Sun, 29 May 2011 18:16:11 +0200
Subject: Fun Cube Dongle Pro internals
Message-ID: <20110529161611.GB4532@prithivi.gnumonks.org>

Hi!

For those interested, I've taken apart the case and did some
investigation how the FCDP hardware architecture looks like.

The results are available at
http://tetra.osmocom.org/trac/wiki/Funcube_Dongle

It seems the silicon tuner actually is intended for DVB-T, thus the
bandwidth it can down-convert is _much_ higher.  However, the audio
codec that they use can only do 96kHz.

That's actually really sad.  I wish they had used something with higher
ADC rate.  But it seems like even high-end audio codecs never get you
beyond 196/216 kHz - still insufficient for e.g. GSM.

Regards,
	Harald
-- 
- Harald Welte <laforge at gnumonks.org>           http://laforge.gnumonks.org/
============================================================================
"Privacy in residential applications is a desirable marketing option."
                                                  (ETSI EN 300 175-7 Ch. A6)