Simulated MAny to Many Fira Session

Wireless Connectivity Ultra-Wideband
1

Dear All,
Im esting 1 to many fira protocol but I need to change it in Many to Many (many controller and many responder)

  • Which is the best way to do this ?
  • Can I sequentially open different session ID on responder by simply adding a new session id to the “enumfira_helper_init_session” or do i need to close the previous session id and open the new one very quickly?

Thanks a lot.
Nicola

2

There currently is no definition in Fira for many to many.

The DL-TDOA and UL-TDOA are the current methodologies for many

3

thanks rexxdad ,
can you explain The DL-TDOA and UL-TDOA ? Im new to this technology. Is there any demo code?
Thanks

4

Downlink Time-Difference-of-Arrival
And Uplink Time-Difference-of-Arrival

In Downlink the Multiple anchors broadcast their location and time reference, and the devices calculate their position relative to all anchors

Uplink is the reverse, the devices(tags) broadcast and the multiple anchors hear the message, and some central service somewhere has to calculate to determine where the tags are, and how to use that info (draw map, command device OOB to move in some direction for some distance)

Apple has announced support for DL-TDOA in iOS 27 on some devices as part of Apple nearby v6