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Bluetooth Low Energy is unsuitable for COVID-19 contact tracing, say inventors

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Syntax Error:
For those playing at home, here is how the British boffins simulated a 'real world' BLE environment at R.A.F. Leeming this April.

(uk) NHS COVID App Closed Beta Test Data Gathering Plan

https://github.com/nhsx/COVID-19-app-Documentation-BETA/blob/master/Beta%20Test%20Staged%20Exercise.pdf

Not so sure this is a real world scenario for a public transit system, supermarket or campus, but at least they were  using some kind of scientific method.

Battlefield tested: https://www.raf.mod.uk/news/articles/rafs-digital-airbase-tests-covid-19-tracking-app/

SilverSolder:

--- Quote from: Red Squirrel on May 13, 2020, 06:24:23 am ---[...]
 Companies should be required to keep at least a certain percentage like say, 80% of work work within the country.   That's never going to happen though.

--- End quote ---

We are all divided into groups called "countries" because it is human nature to think of our "country" as a kind of extended family, that we want to take care of and that we expect to take care of us too. 

It becomes increasingly difficult make the emotional connection, beginning with your own actual family (high divorce rates etc.)...  your neighbourhood...  town... state/province... country...  continent...  planet.  Arguably, the higher up you make it in that pyramid, the better person you become?

tszaboo:
I did a test before for RSSI distance estimation. There was two dev boards, fixed location, fixed environment, pinging each other for hours, 2.4GHz. The RSSI values went anywhere from -52dBm to -40dBm, average is -45dBm (1.2m distance), bell curve distribution. And that with simple, unobstructed, well defined antennas, custom firmware, kept in place during the test, no humans around, no large metal surfaces. 6dB means double the distance.
Different phone manufacturers will used different bluetooth implementation, with different gain on the antenna, different margin to the +10dBm legal limit, different algorithm to save battery power. The phone antenna has directionality. This doesnt work, even in the best scenario.

Marco:
Someone already had the ultrasonic idea and applied it.

https://www.novid.org/

They make a good point that it also solves another false positive problem with RF, sound doesn't go through barriers as easily.

SiliconWizard:

--- Quote from: Marco on May 13, 2020, 03:13:30 pm ---Someone already had the ultrasonic idea and applied it.

https://www.novid.org/

They make a good point that it also solves another false positive problem with RF, sound doesn't go through barriers as easily.

--- End quote ---

Uh huh, but I always  find it interesting when people claim to reliably emit AND record ultrasounds on most mobile phones just using the existing hardware.

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