[srsran-users] How to connect UE to a specific cell

[Johann T.]

Thank you, Robert. I will give it a try.

Best,
Johann





On Thu, Aug 11, 2022 at 2:53 PM Robert Falkenberg <robert.falkenberg at srs.io>
wrote:

> Hi Johann,
>
> yes, you can restrict the cell search via phy.force_N_id_1 or
> phy.force_N_id_2.
> Setting phy.force_N_id_2 (i.e. selecting one of three possible PSS
> sequences) will work in presence of other stronger cells as long as they
> have different N_id_2.
>
> Restricting the N_id_1 (i.e. selecting a SSS sequence), however, comes
> with the following caveat:
> srsue/src/phy/search.cc
>
>     /* Note that srsran_ue_cellsearch_scan_N_id_2 only finds the strongest cell for a given N_id_2/PSS within the search
>      * window. A cell with the desired SSS can be occluded by other cells with the same PSS, if their PSS is stronger and
>      * within the same search window.
>      */
>
> Best regards,
> Robert
>
> On 10.08.22 09:17, Johann T. wrote:
>
> Dear all,
>
> In our setup, we are using the srsue to connect to our test eNB. Currently
> srsue always connects to the strongest cell.
>
> Is there a way to force the UE to connect to a specific cell? For example:
> the eNB has two cells (e.g. PCI 1 and PCI 2). How to configure the UE to
> connect to PCI 2, even when it has lower signal compared to PCI 1?
>
> I noticed that there are parameters "force_N_id_2" and "force_N_id_1" in
> the ue.conf file. Can these parameters be used for the purpose I mentioned
> above?
>
> Or perhaps I need to modify the srsue source code to achieve this? Any
> pointer is this direction?
>
> Many thanks in advance.
>
> Best regards,
> Johann
>
>
>
>
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> ​
> --
> Robert Falkenberg
>
> Senior Engineer
>
> Software Radio Systems
>
>
>
> robert at srs.io
> www.srs.io <//www.srs.io>
> Dortmund, Germany
>
>
>
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