Inquiry about Using UE as a D2D Relay

Dear Simu5G Contributors,

I would like to inquire about the possibility of achieving the following scenario using the current D2D sample code:

Suppose there is a downlink stream from the server to gNB to UE, with UE0 located at the edge of the gNB, resulting in poor channel quality. Can we use UE1, which is situated between the gNB and UE0, as a relay to forward the stream to UE0 via D2D communication?

I came across a closed issue on the website that discussed this scenario https://github.com/Unipisa/Simu5G/issues/32, but it lacked an implementation.

Additionally, I found information from the README.txt file regarding Dynamic Mode Switching (https://github.com/Unipisa/Simu5G/tree/master/simulations/NR/d2d). However, the code in the .ini file mentioned that the sender application is at ueD2DTx. Is it possible to configure the CbrSender at the server side?

If the current code is not supported, can you guide me on how to modify it and which sections need to be changed?

Thank you for your time and consideration. Please let me know if you have any further information.

Best regards.

Start with README.txt and the configuration files under simulations/NR/d2d, focusing on the .ini settings for ueD2DTx and CbrSender. Trace how the current D2D sample represents the sender and relay scenario, then document whether the requested server-side configuration is supported and identify the relevant changes needed if it is not.