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
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
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@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
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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.
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.
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Harald Welte -
Neels Hofmeyr -
Sipos Csaba