5 ms·

Probably just the wifi TSF: https://en.wikipedia.org/wiki/Timing_Synchronization_Function https://en.wikipedia.org/wiki/Timing_Synchronization_Functio... Notab

Probably just the wifi TSF: https://en.wikipedia.org/wiki/Timing_Synchronization_Function https://en.wikipedia.org/wiki/Timing_Synchronization_Functio... Notably used by the Wii U: https://patchwork.kernel.org/patch/5865651/ https://patchwork.kernel.org/patch/5865651/

chemag 10y ago
TSF is not scalable[0]. [0] http://web.cse.ohio-state.edu/~lai/788-Au03/2-scalibility.pdf http://web.cse.ohio-state.edu/~lai/788-Au03/2-scalibility.pd...
- chemag 10y ago
  I should have mention this only applies to IBSS (ad-hoc), not to (infra) BSS, where the AP sends the beacon
theon144 10y ago
>On a commercial level, industry vendors assume the 802.11 TSF's synchronization to be within 25 microseconds. Meh. Still cool, but a far cry from the sub-MICROsecond accuracy the page suggest, which would indeed be quite revolutionary.
- chemag 10y ago
  I'm curious which are the use cases for sub-microsecond time sync. Entertainment can probably do with millisecond accuracy. Other use cases mentioned by the Wifi Alliance preso are healthcare, industrial, automotive, and IoT. Do you know any precise use cases?