[srsran-users] Support for TM3 and TM4 in DL

[Nitin Jain]

Hi SRSRAN team,Please look at issue logged on github:https://github.com/srsran/srsRAN_4G/issues/1302

I am unable to make TM3 and TM4 with COTS UE.
I configured tm=4 and nof_ports= 2 in enb.conf
I did debug parameters and could see that nof_tb  is never 2 and down the PDSCH chain, tm is seen as 0 indicating that TM1 is in force. 
Is there any quick fix I need to do or if I am missing any configuration.I did search all params but could not immediately find any parameters which need to be configured.

Regards Nitin 
 

    On Friday, 15 March, 2024 at 02:22:08 pm IST, Alin Stoica <alinstoica1234567 at gmail.com> wrote:  
 
 
Hello,


I'm currently utilizing srsRAN for LTE network analysis and have been closely examining the Uplink Control Channel (PUCCH) performance using srsGUI. The visualized equalized symbols on the PUCCH have prompted some questions regarding the underlying equalization techniques employed by srsRAN.

I would appreciate if you could provide some details on the following:
   
   -    
What equalization methods does srsRAN implement for PUCCH, and is it possible to choose between them, for instance, between Zero Forcing (ZF) and Minimum Mean Square Error (MMSE)?

   -    
Moving on to the downlink, I'm interested in understanding how the Physical Downlink Control Channel (PDCCH) is processed. Is there a way to visualize PDCCH equalized symbols in srsGUI similar to PUCCH?


First image(15-05-42) is what i see an DL traffic, and second is what i see on UL traffic.


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