[srslte-users] Changing srsLTE Configuration

[Ayman Maghrabi]

Hi Andre,

I am planning to add a QCI 1 later on, but just wanted to see the behavior.
I've tried modifying it to 9, but epc still shows 7. I thought maybe
because the default configuration has the user_db.csv stored somewhere else
that isn't being modified, so I tried to run the epc.conf that is in the
srsepc directory, but I get an error in reading the user_db.csv file. Below
is the output:










*~/srsLTE/srsepc$ sudo srsepc epc.confBuilt in Release mode using commit
d045213f on branch master.---  Software Radio Systems EPC  ---Reading
configuration file epc.conf...Error reading user database file
user_db.csvError initializing HSS*

The csv file is the same as the example, except the QCI for both is 9
instead of 7. When I rename the file and add (.example) to the end, epc
initializes but with a different user_db.csv file because QCI is back to 7.

Appreciate your thoughts on this.

Regards,
Ayman

On Mon, Apr 20, 2020 at 5:26 AM Andre Puschmann <
andre.puschmann at softwareradiosystems.com> wrote:

> Hi,
>
> On 19/4/20 5:41, Ayman Maghrabi wrote:
> > Hello all,
> >
> > I've setup srsLTE one two PCs with USRP. I can run them with the default
> > configuration with no issue.
> >
> > I have been trying to change some minor configuration at the moment,
> > such as QCI in the user_db.cv <http://user_db.cv> file just to examine
> > the behavior, but it appears that no change I do gets passed on. For
> > example, I changed the QCI values from 7 to 1, but the srsEPC still
> > shows a QCI of 7. I even tried to delete the UE entry from the .cv file
> > that corresponds to srsUE, but it still connects.
>
> The eNBs drb.conf only has an entry for QCI 7 and 9. I think if the EPC
> sends a invalid QCI it defaults to 7. But the should be an error logged.
>
> So either change between 7 or 9, or add QCI 1 to the config.
>
> Regarding the deletion of the UE entry: Make sure to exit srsEPC before
> editing the CSV. The EPC saves the current context to the file so you're
> changes get overridden if you do them while having the EPC running.
>
> If the CSV is empty, no UE can attach.
>
> Cheers
> Andre
>
> >
> > Is there a specific way that I need to change these settings?
> >
> > Regards,
> > Ayman
> >
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