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

[Robert Falkenberg]

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
>
>
>
>
> _______________________________________________srsran-users mailinglistsrsran-users at lists.srsran.comhttps://lists.srsran.com/mailman/listinfo/srsran-users

​
-- 


      RobertFalkenberg

Senior Engineer

Software Radio Systems

	
	
	
	

	robert at srs.io <mailto:robert at srs.io>

	www.srs.io <//www.srs.io>

	Dortmund, Germany




	
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