Wi-Fi RSSI In Ad-Hoc Mode

I am sitting here thinking about how might be implemented the RSSI and
RSSI trigger features for IEEE 802.11. For those that are not
familiar:

1. RSSI is the received signal strength
2. RSSI trigger is an indication that is pass upwards through the
stack when certain RSSI threshold has been crossed.

In both cases, it does not make sense to say that a target interface
receives a signal of a certain strength without specifying the source.
Naturally, if there are multiple sources, there are mutliple
transmitters, at different distances, so the RSSI at the target will be
different for each transmitting source.

I am wondering if this is the reason why so few adapters support the
RSSI trigger feature (in software at least on Windows) . To make it
work, target adapter would have to keep track of the MAC addresses of
old frames. When a new frame is received, the received signal strength
calculated during the reception of that particular frame would have to
be compared to that caculated during reception of other prior frames
with the same MAC address. For infrastructure mode, the MAC address is
often that of the access point and is narrow-sense stationary.
However, for ad-hoc mode, the *very first* reception of a frame that
appears "out of the blue" has a MAC address that could not possibly be
compared with a previous MAC address, as there were none. Then what?
If I were the engineer prescribing what should be done in this
situation, I would force a trigger. But at present, it seems that the
adapter drive writers do nothing at all, which, as I have stated in a
previous post, is extremely perplexing/frustrating.

I would like to know if anyone has ever used or seen this feature in
software, and if not, whether they expect any of the driver writers to
support it in the near future.

Reference:
http://msdn.microsoft.com/library/de...d8b09c.xml.asp

-Le Chaud Lapin-