Channel Sounding - Speed and Multiple Devices

[MatthewP]

Hi,

We are evaluating BLE Channel Sounding for indoor localization of small mobile robots. We need 2D localization within the room, so we would need to measure the distance to multiple anchors.

We have some basic questions about this:

• How fast can a single distance measurement be performed? I've seen numbers in the range of 100ms?
• Is it possible to be paired with multiple anchors and perform BLE CS sequentially without having to establish a new connection each time?
• When can we expect an update of the SDK with CS support?

Thank you very much for your response.

BR, Matthew

[Simonr]

Hi

1. As we Channel sounding is still experimental on our end, I'm not sure we have the lowest possible time yet, but under 100ms seems doable at least. I assume you mean a ranging after the devices are connected and synchronized, correct?
2. I have asked the developers of the channel sounding features in the nRF Connect SDK about this, as I am not sure from just reading the spec and technical overview.
3. Experimental support was indeed added as of NCS 2.8.0. More details available here.

I'll let you know when I hear back from the devs regarding question 2, and if they have some more input on your first question.

Best regards,

Simon

[MatthewP]

Hi Simon,

1. Yes, exactly. The question is basically "under ideal conditions with all devices connected, which ranging update rate can I expect".
2. Great, thank you!

Thank you for your help, very much appreciated.

BR, Matthew