The problem of aodt_sim modified in AODT

[guofachang]

Hi, community:
I am trying to figure out the impact of the backend aodt_sim on the UI, and have some questions to consult:

1. Based on Ran simulation, I modify the parameters in /aodt/aodt_sim/src_be/components/common/config_ran.json, i.e., the TDD pattern is “1”:
   

Then, I restarted worker and container. However, the docker logs are still:

where TDD pattern follows the default setting. how can it be modified and applied in UI scene.

2. When combing the backend code, I fail to locate the file about UE cuPHY part shown in the following figure:
   

   
   
   Does the RU phy and mac code that AODT execute locate on backend_bundle/aodt_sim/external/cuBB? and Where is the UE code?

3. I guess the key function for RAN simulation is handler_play_full_sim whose path is src/asim_loop.cpp. It is correct? How to call the code of cuPHY and cuMAC in this function?

Thank you.

[kpasad1]

@guofachang

1. Did you modify the correct config_ran.json? If you are running the container, then you need to modify the config_ran.json inside the container e.g. location:
   aerial@c_aodt_sim_kpasad:/home/kpasad/asim_em/src_be/components/common
2. Yes, the MAC/PHY is located in backend_bundle/aodt_sim/external/cuBB. UE reuses cuPHY for PDSCH processing. Calls for UE processing are made :

• For DL:

• UE’s reception is managed by `class PuschPipeline: src_be/bindings/asim_cuphy_pusch.hpp#L355

• The UE’s Rx configuration is setup here : src_be/controller/src/be_ctrl.cu#L1912

• For UL:

• UE’s transmission is managed by `class PdschPipeline : src_be/bindings/asim_cuphy_pdsch.hpp#L207

• The UE’s Tx configuration is setup here : src_be/controller/src/be_ctrl.cu#L2737

3. The key Ran simulation is indeed in handler_play_full_sim. See above on the flow.

[guofachang]

Thank you for your reply. It works.