RE: Channel sounding parameters

Simonr — Mon, 30 Jun 2025 13:24:11 GMT

I numbered the questions as I could find them. That is easier to refer to when answering multiple questions.

1. main_mode_repetition is the number of main mode steps taken between substeps. main mode here is one of the mode-1 to mode-3 steps used for actual distance measuring doing channel sounding.

2. The number of times the channel map field will be cycled to for the non-mode 0 steps.

3. The number of subevents set is set with the subevents_per_event; in bt_conn_le_cs_procedure_enable_complete struct.

4. After that the number of events and subevents are decided by the other parameters set I believe.

5. For channel selection in Channel Sounding, you can use the bt_le_cs_set_channel_classification function. Note that this is currently experimental as far as I know. You could also alternatively use the "normal" way of channel mapping if you'd like, but that's up to you. If not, channel selection is just done "automagically" I think.

Best regards,

Simon

RE: Channel sounding parameters

witc — Fri, 27 Jun 2025 09:56:55 GMT

What I do not understand also:

I set max_procedure_len to 100 ms and min_procedure_interval to 1000 ms. I also set continuous measurement (max_procedure_count = 0). But in the log, the CS result has a period of 210 ms. Should not the period of the procedures be 1000ms + up to100 ms?

Also, for the maximum procedure length (100 ms), I set min_subevent_len to 500 ms. I expected, for example, a problem during compilation - that the parameter is invalid. Or can I set the subevent to be longer than the procedure?

Thank you.