Hello, I am looking into indoor navigation and position for a Unity3D XR project.
I am wondering what the latency is between beacon and modem and if it’s suitable for person tracking - will the lag be noticable?
Many thanks,
Ollie.
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Hi @olliej777 and welcome to the forum.
Please have a look at this people tracking use case: https://marvelmind.com/pics/marvelmind_presentation_people_tracking_exhibitions.pdf. It is mentioned that latency was low.
Also, here are some tips from Marvelmind on how to reduce latency: https://marvelmind.com/download/how_increase_location_update_rate/
I hope this helps!
Thank you.
Hello, thank you for your response - looking at the video within your link the example suggests to give only a refresh rate of maybe 1 per second.
Essentially I wish to overlay augmented content within non-positional-aware AR Glasses and for the user to freely navigate around a controlled environment; to which the Marvelmind will be able to determine the location of the user, and thus I can render the augmented content in relation to the user in a top down axis (just like that video).
I’m happy with a give-or-take of less than 20cm of accuracy - as its large content I’ll be augmenting (thus ‘off zero’ will not be noticeable).
However I’m more concerned about the latency after watching that video; the user will get some serious lag if the rate is truly 1 per second as the video suggests.
Hello colleagues,
About latency and the update rate:
- https://marvelmind.com/how_increase_location_update_rate/
-
https://marvelmind.com/pics/marvelmind_robotics_location_update_rate_and_user_data_transfer_rate_table.pdf
i.e. the update rate be as high as 40 Hz for tine submaps of 2x2 meters and corresponding latency 30 ms or so.
For larger maps, the update rate is typically 8-16 Hz, and latency is 1/16-1/8 ms.
There are many other settings, such as averaging, filtering, etc., which often come at the expense of latency. Thus, you can always strike a balance between accuracy, update rate, range, and robustness of tracking.
BR,
Maxim
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