23 Jun
2023
23 Jun
'23
11:18 a.m.
Hi Neels,
I checked RF and BB hopping with my MetroSite with my patch added, and
they both seem to work, multi-TRX was tested a couple days ago, that
also works with 2 TRXes. Obviously I did not tested every possible
hopping scenarios, but in both cases the node manager reported the
correct hopping states and I also checked with a spectrum analyzer.
This means that either my UltraSite still has some issues, or that the
config logic for it needs a bit of tuning. The one difference I have
noticed is that the MetroSite does starts the RSL LAPD when the TRXes
reach a configured state, while the UltraSite needs the BSC to start
the RSL LAPD links even after the TRXes reach the same configured
state. FYI, I am running exactly the same BTS SW release on both units
(latest LTS ever released by the vendor), so they should not behave
differently from a pure SW point of view.
Anyway, at this point in time I don't see any particular issues that
indicates a BSC problem. One feature missing is the ability to
configure sectors (Nokia calls a sector a "BTS" while the base station
is called "BCF"). My question is, do we have any BTS type that has
sector configuration support so I can take a look how this was done
(if any) ?
Regards,
Csaba
23 Jun
23 Jun
3:27 p.m.
On Fri, Jun 23, 2023 at 11:18:35AM +0200, Sipos Csaba wrote:
Hi Neels,
Hi Csaba,
I would welcome if you could address everyone instead of me,
so that the conversation is open for others to chip in.
More likely for you to get interesting answers that way =)
I don't know much about hopping nor LAPD, nor sector config.
~N
I checked RF and BB hopping with my MetroSite with my patch added, and
they both seem to work, multi-TRX was tested a couple days ago, that
also works with 2 TRXes. Obviously I did not tested every possible
hopping scenarios, but in both cases the node manager reported the
correct hopping states and I also checked with a spectrum analyzer.
This means that either my UltraSite still has some issues, or that the
config logic for it needs a bit of tuning. The one difference I have
noticed is that the MetroSite does starts the RSL LAPD when the TRXes
reach a configured state, while the UltraSite needs the BSC to start
the RSL LAPD links even after the TRXes reach the same configured
state. FYI, I am running exactly the same BTS SW release on both units
(latest LTS ever released by the vendor), so they should not behave
differently from a pure SW point of view.
Anyway, at this point in time I don't see any particular issues that
indicates a BSC problem. One feature missing is the ability to
configure sectors (Nokia calls a sector a "BTS" while the base station
is called "BCF"). My question is, do we have any BTS type that has
sector configuration support so I can take a look how this was done
(if any) ?
Regards,
Csaba
--
- Neels Hofmeyr <nhofmeyr(a)sysmocom.de> http://www.sysmocom.de/
=======================================================================
* sysmocom - systems for mobile communications GmbH
* Alt-Moabit 93
* 10559 Berlin, Germany
* Sitz / Registered office: Berlin, HRB 134158 B
* Geschäftsführer / Managing Directors: Harald Welte
25 Jun
25 Jun
3:08 p.m.
Dear All & Neels,
Of course anyone is more than welcome to join, this is a mail list after all.
I tested up to four TRX with the Metro and that works as well. Once
everything is tested and working I will provide example files, and try
to updated the Nokia specific wiki as it is quite outdated (info is
from the NITB era).
Will try to look at Ericsson and BS-11, maybe there are some clues
about sectors there.
Regards,
Csaba
Neels Hofmeyr <nhofmeyr(a)sysmocom.de> ezt írta (időpont: 2023. jún.
23., P, 15:27):
On Fri, Jun 23, 2023 at 11:18:35AM +0200, Sipos Csaba wrote:
Hi Neels,
Hi Csaba,
I would welcome if you could address everyone instead of me,
so that the conversation is open for others to chip in.
More likely for you to get interesting answers that way =)
I don't know much about hopping nor LAPD, nor sector config.
~N
I checked RF and BB hopping with my MetroSite with my patch added, and
they both seem to work, multi-TRX was tested a couple days ago, that
also works with 2 TRXes. Obviously I did not tested every possible
hopping scenarios, but in both cases the node manager reported the
correct hopping states and I also checked with a spectrum analyzer.
This means that either my UltraSite still has some issues, or that the
config logic for it needs a bit of tuning. The one difference I have
noticed is that the MetroSite does starts the RSL LAPD when the TRXes
reach a configured state, while the UltraSite needs the BSC to start
the RSL LAPD links even after the TRXes reach the same configured
state. FYI, I am running exactly the same BTS SW release on both units
(latest LTS ever released by the vendor), so they should not behave
differently from a pure SW point of view.
Anyway, at this point in time I don't see any particular issues that
indicates a BSC problem. One feature missing is the ability to
configure sectors (Nokia calls a sector a "BTS" while the base station
is called "BCF"). My question is, do we have any BTS type that has
sector configuration support so I can take a look how this was done
(if any) ?
Regards,
Csaba
--
- Neels Hofmeyr <nhofmeyr(a)sysmocom.de> http://www.sysmocom.de/
=======================================================================
* sysmocom - systems for mobile communications GmbH
* Alt-Moabit 93
* 10559 Berlin, Germany
* Sitz / Registered office: Berlin, HRB 134158 B
* Geschäftsführer / Managing Directors: Harald Welte 
30 Jun
30 Jun
12:08 p.m.
Hi Sipos,
On Fri, Jun 23, 2023 at 11:18:35AM +0200, Sipos Csaba wrote:
I checked RF and BB hopping with my MetroSite with my
patch added, and
they both seem to work, multi-TRX was tested a couple days ago, that
also works with 2 TRXes. Obviously I did not tested every possible
hopping scenarios, but in both cases the node manager reported the
correct hopping states and I also checked with a spectrum analyzer.
This is good news. Is that patch already in gerrit somewhere?
Anyway, at this point in time I don't see any
particular issues that
indicates a BSC problem. One feature missing is the ability to
configure sectors (Nokia calls a sector a "BTS" while the base station
is called "BCF"). My question is, do we have any BTS type that has
sector configuration support so I can take a look how this was done
(if any) ?
I think we never had support for this in OsmoBSC or even before in OpenBSC.
In GSM/3GPP spec language, every sector is a BTS. The fact that many networks
use sectorized cells is nothing that reflects anywhere in the specification or
the terminology. It's an implementation detail.
I think from the OsmoBSC point of view, a typical 3-sector site would still be
three logical BTSs (in the data model / structures). It's "just" the
respective
manufacturer OML code would have to be adjusted to accomodate a situation where
there are managed objects that only exist once per site, while others
exist per BTS/TRX/...
We have the same situation with Ericsson OM2000 support: Right now one
can only have a single BTS per RBS, as our OM2000 code doesn't
distinguish between MOs that exist once per site only (CF, TF, IS, ...)
and MOs that exist for each BTS.
--
- Harald Welte <laforge(a)osmocom.org> https://laforge.gnumonks.org/
============================================================================
"Privacy in residential applications is a desirable marketing option."
(ETSI EN 300 175-7 Ch. A6)
12:09 p.m.
On Sun, Jun 25, 2023 at 03:08:51PM +0200, Sipos Csaba wrote:
I tested up to four TRX with the Metro and that works
as well. Once
everything is tested and working I will provide example files, and try
to updated the Nokia specific wiki as it is quite outdated (info is
from the NITB era).
Thanks in advance!
Will try to look at Ericsson and BS-11, maybe there
are some clues
about sectors there.
See my other mail, unfortunately it's not something implemented.
--
- Harald Welte <laforge(a)osmocom.org> https://laforge.gnumonks.org/
============================================================================
"Privacy in residential applications is a desirable marketing option."
(ETSI EN 300 175-7 Ch. A6)
324
days inactive
331
days old
4 comments
3 participants
participants (3)
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Harald Welte -
Neels Hofmeyr -
Sipos Csaba