Concurrent channel sounding procedures

[Triscuit]

Hi,

I am trying to create a trilateration system with 3 initiators and 1 reflector (Hopefully multiple reflectors in the future) on the nrf54l15. The channel sounding with range requestor sample code demonstrates a one to one connection, but I modified the reflector logic so it keeps up to 4 connections in an array. When I run channel sounding with just one to one connection everything works perfectly. When I try to connect two initiators they both connect but usually only one initiator is able to receive the distance data, the other one just keeps displaying "tried to parse empty data", but once in a while they would both receive data, and sometimes they both don't get data. I am not sure what the issue really is. I thought about the reflector not having enough buffer but I turned it up already in the config file. Could this be a hardware issue? Is it just interference or maybe the sample code just cannot handle concurrent connections? I only saw one other post about concurrent connections and they only got it in sequential order. Any advice is appreciated as I cannot really progress at this point, thanks!

[Triscuit]

I tried a new method with 3 reflectors and 1 initiator instead, however, I am still running into the same issue. I have done a lot of testing and nothing worked. I am starting to believe that this is due to hardware limitation. I asked chatGPT and it mentioned that the nrf54l15dk has only one radio. In order to perform concurrent connections the singular radio needs to switch between two different connections. Channel sounding needs very precise timing and the switch between them causes them to receive poor data and sometimes no data. This aligns with my tests, where if I just run one procedure it works fine, however, when I run multiple they start encountering issues. It also mentioned that in the SoftDevice Controller it only allows one channel sounding procedure to be carried out at a time, which we cannot change unless we request a custom kit from Nordic, is this true? Knowing this, could an engineer maybe provide advice on how to make this work on the software side? Or could someone confirm my suspicion of this hardware limitation and let me know if this is possible. Thanks so much.