What is the order in which BLE signals are "seen" at the link layer or below?

[Glenn Zelniker]

I'm wondering how BLE signals are handled at the layer below the scanning module. Namely, suppose there are hundreds of BLE modules that are all advertising nearby. How does the lower-level logic work in determining which signals "bubble up" to the stack and get processed by the scanning module? Are the signals recognized in order of decreasing strength? Is it random?

[Glenn Zelniker]

Edvin,

I am asking specifically about what happens at a layer below the one at which filtering and whitelisting occurs. What does the radio see first and pass up to the stack: signals with the highest power? 

Thanks,

Glenn

[Edvin]

Glenn Zelniker said:

signals with the highest power? 

 No, the signal that occurs first (in time, not signal strength).