5 Sep
2011
5 Sep
'11
6:23 a.m.
Hi list,
I want to implement a L1 hardware and software for openbsc. But I am not
familiar with openbsc framework.
I saw there is a project named osmo-nitb which is a standalone application
that implement L2 L3 and some
other gsm network function. If I can using my L1 software connect to
osmo-nitb through abis-overip? Also I
notice another project osmo-bts project which implement BTS-side Layer3 and
Layer2 protocol. So can I
just implement BTS side L1 then combine with osmo-bts which connect to
osmo-nitb?
Regards!
5 Sep
5 Sep
9:04 a.m.
Hi John,
yes, the 'osmocom' way to integrate your L1 hardware would be ot use
osmo-bts as basis. It already supports one existing L1 (for the
upcoming sysmocom BTS), and Andreas has been working on supporting some
hacked-up OsmocomBB phones as alternative L1 for it.
osmo-bts then connects via Abis/IP to openbsc (osmo-bsc or osmo-nitb).
In any case we would love to hear more about your L1 hardware. Can you
tell us more about it?
Regards,
Harald
--
- Harald Welte <laforge(a)gnumonks.org> http://laforge.gnumonks.org/
============================================================================
"Privacy in residential applications is a desirable marketing option."
(ETSI EN 300 175-7 Ch. A6)
9:20 a.m.
We are just planning on this project which use usb based sdr board and will
be open
design and source. sounds like sysmocom already working on this.
Regards!
On Mon, Sep 5, 2011 at 5:04 PM, Harald Welte <laforge(a)gnumonks.org> wrote:
Hi John,
yes, the 'osmocom' way to integrate your L1 hardware would be ot use
osmo-bts as basis. It already supports one existing L1 (for the
upcoming sysmocom BTS), and Andreas has been working on supporting some
hacked-up OsmocomBB phones as alternative L1 for it.
osmo-bts then connects via Abis/IP to openbsc (osmo-bsc or osmo-nitb).
In any case we would love to hear more about your L1 hardware. Can you
tell us more about it?
Regards,
Harald
--
- Harald Welte <laforge(a)gnumonks.org>
http://laforge.gnumonks.org/
============================================================================
"Privacy in residential applications is a desirable marketing option."
(ETSI EN 300 175-7 Ch. A6)
11:19 a.m.
Hi John,
On Mon, Sep 05, 2011 at 05:20:17PM +0800, John Wu wrote:
We are just planning on this project which use usb
based sdr board and
will be open design and source.
In that case, what do you plan to use as layer1? A simple SDR board
only implements "Layer 0", but what about layer1?
osmo-bts and openbsc implement layers >= 2.
So what is your plan for L1 ?
sounds like sysmocom already working on this.
sysmocom is not building a USB based SDR, but a complete embedded BTS
product (picocell). That's quite something different.
And while osmo-bts and openbsc are free software available in source
code, the sysmoBTS L0 (hardware) and L1 (FPGA+DSP image) are not.
So by all means, don't be discouraged from building more hardware that
interoperates with GSM related Free and Open Source software!
Regards,
Harald
--
- Harald Welte <laforge(a)gnumonks.org> http://laforge.gnumonks.org/
============================================================================
"Privacy in residential applications is a desirable marketing option."
(ETSI EN 300 175-7 Ch. A6)
11:46 a.m.
As a quick note, I'm working on the channel coding / decoding for GSM
L1 (since we'll need those for osmocom-bb-bts), basically generic
routines to go from L2 messages to bursts bits to be modulated. (GSM
05.03 essentially).
So if you work on this, I'd suggest starting with getting the part
below this working first (tx and rx of bursts)..
Cheers,
Sylvain
16 Sep
16 Sep
4:03 a.m.
Hi Sylvain,
I also need to implement channel coding / decoding and modulate / demodulate
for my L1 implement. can you explain how osmocom-bb-bts works, what kind of
data receive from and send to the hardware?
Regards!
On Mon, Sep 5, 2011 at 7:46 PM, Sylvain Munaut <246tnt(a)gmail.com> wrote:
As a quick note, I'm working on the channel coding
/ decoding for GSM
L1 (since we'll need those for osmocom-bb-bts), basically generic
routines to go from L2 messages to bursts bits to be modulated. (GSM
05.03 essentially).
So if you work on this, I'd suggest starting with getting the part
below this working first (tx and rx of bursts)..
Cheers,
Sylvain
3:58 a.m.
Hi Harald,
yeah, the hardware is layer0, then I will also implement L1 code in PC side.
I have download osmo-bts source but I dont very understand the source
architecture. can you introduce the architecture or if there is a design
document.
I need to know where should I implement my L1 code. and the interface with
higher layer.
On Mon, Sep 5, 2011 at 7:19 PM, Harald Welte <laforge(a)gnumonks.org> wrote:
Hi John,
On Mon, Sep 05, 2011 at 05:20:17PM +0800, John Wu wrote:
We are just planning on this project which use
usb based sdr board and
will be open design and source.
In that case, what do you plan to use as layer1? A simple SDR board
only implements "Layer 0", but what about layer1?
osmo-bts and openbsc implement layers >= 2.
So what is your plan for L1 ?
sounds like
sysmocom already working on this.
sysmocom is not building a USB based SDR, but a complete embedded BTS
product (picocell). That's quite something different.
And while osmo-bts and openbsc are free software available in source
code, the sysmoBTS L0 (hardware) and L1 (FPGA+DSP image) are not.
So by all means, don't be discouraged from building more hardware that
interoperates with GSM related Free and Open Source software! Regards,
Harald
--
- Harald Welte <laforge(a)gnumonks.org>
http://laforge.gnumonks.org/
============================================================================
"Privacy in residential applications is a desirable marketing option."
(ETSI EN 300 175-7 Ch. A6)
21 Sep
21 Sep
1:14 a.m.
Hi Harald,
Can you suggest how do I implement the L1 source?
Regards
On Fri, Sep 16, 2011 at 11:58 AM, John Wu <jwjohn0(a)gmail.com> wrote:
Hi Harald,
yeah, the hardware is layer0, then I will also implement L1 code in PC
side.
I have download osmo-bts source but I dont very understand the source
architecture. can you introduce the architecture or if there is a design
document.
I need to know where should I implement my L1 code. and the interface with
higher layer.
On Mon, Sep 5, 2011 at 7:19 PM, Harald Welte <laforge(a)gnumonks.org> wrote:
Hi John,
On Mon, Sep 05, 2011 at 05:20:17PM +0800, John Wu wrote:
We are just planning on this project which use
usb based sdr board and
will be open design and source.
In that case, what do you plan to use as layer1? A simple SDR board
only implements "Layer 0", but what about layer1?
osmo-bts and openbsc implement layers >= 2.
So what is your plan for L1 ?
sounds
like sysmocom already working on this.
sysmocom is not building a USB based SDR, but a complete embedded BTS
product (picocell). That's quite something different.
And while osmo-bts and openbsc are free software available in source
code, the sysmoBTS L0 (hardware) and L1 (FPGA+DSP image) are not.
So by all means, don't be discouraged from building more hardware that
interoperates with GSM related Free and Open Source software! Regards,
Harald
--
- Harald Welte <laforge(a)gnumonks.org>
http://laforge.gnumonks.org/
============================================================================
"Privacy in residential applications is a desirable marketing option."
(ETSI EN 300 175-7 Ch.
A6)
5 Sep
5 Sep
4:58 p.m.
I
Also notice another project osmo-bts project which
implement BTS-side
Layer3 and Layer2 protocol. So can I
just implement BTS side L1 then combine with osmo-bts which connect to
osmo-nitb?
hi john,
i like to note: the "jolly/bts" branch of osmocombb is an obsolete. if
you check out osmo-bts.git, you will get the current stage. see "jolly"
branch for work on osmocombb-bts (>layer1), as well as "master" branch
for current work on sysmo-bts. you can take this for a basis to
implement your own bts support.
regards,
andreas
16 Sep
16 Sep
4:05 a.m.
Andreas thanks.
On Tue, Sep 6, 2011 at 12:58 AM, Andreas Eversberg <andreas(a)eversberg.eu>wrote;wrote:
I
Also notice another project osmo-bts project
which implement BTS-side
Layer3 and Layer2 protocol. So can I
just implement BTS side L1 then combine with osmo-bts which connect to
osmo-nitb?
hi john,
i like to note: the "jolly/bts" branch of osmocombb is an obsolete. if
you check out osmo-bts.git, you will get the current stage. see "jolly"
branch for work on osmocombb-bts (>layer1), as well as "master" branch
for current work on sysmo-bts. you can take this for a basis to
implement your own bts support.
regards,
andreas
5030
days inactive
5041
days old
9 comments
4 participants
participants (4)
-
Andreas Eversberg -
Harald Welte -
John Wu -
Sylvain Munaut