MODE_1 and MODE_2 device parameters: which are really needed?

[Przemysław Pawełczak]

Hey Mike,

And another set of two quick questions:

A) Does it really matter for the calculation for the white space whether you ask for device MODE_1 or MODE_2? Reason - we get exactly the same responses for both of these device types

B) And in relation to that: when querying for MODE_1 or MODE_2 device FCC says that antenna parameters (in Google case - height, uncertainty, AGL, antenna characteristics) must be ignored. But we need to pass them to Google anyway. Does really your WSDB implementation ignore antenna properties of MODE_1 and MODE_2 devices?

TIA for a quick reply

Przemek

[Michael Head]

Hi Przemek,

I believe that historically the FCC rules prevented MODE_1 devices from using more than 40 mW, so it previously made a difference. I can't quickly say for certain that it makes absolutely no different today (I would need to refresh myself on the details of the implementation to be sure).

Regarding height, we do ignore antenna height in our calculations for MODE_1 and MODE_2 devices. The PAWS implementation layer may be erroneously requiring it. I anticipate that this bug would be addressed when we migrate our API to implement the final PAWS RFC (naturally, this would be some time after it's ratified).

-- mike

[Przemysław Pawełczak]

Thanks Mike. 

Przemek