I did mean RSSI - just about anything that when interpreted as an 8 bit unsigned int and goes up with increasing signal fits the bill as an RSSI measure. RCPI requires a certain minimum accuracy and linearity (the accuracy required is not very high).
Simon -----Original Message----- From: Johannes Berg [mailto:[EMAIL PROTECTED] Sent: Friday, August 18, 2006 12:02 AM To: Simon Barber Cc: Dan Williams; netdev@vger.kernel.org; Jean Tourrilhes Subject: RE: proposal for new wireless configuration API On Thu, 2006-08-17 at 09:42 -0700, Simon Barber wrote: > The spec for RSSI is very loose - RSSI is just a 8 bit unsigned > number, guaranteed to be a monotonically increasing function of signal strength. > You don't get to know anything about the scale, or linearity of the > function. In essence RSSI is a vendor specific value, of no known units. > Not very useful unless you know some card specific details to help > interpret it. Yeah, if you knew at least linearity it'd be more useful. > Now some cards return a signal strength in dBm as the RSSI - note that > this fits the requirements of a RSSI measure just fine. RCPI is simply > a ^^^^ did you mean to write RCPI there? > more tightly specified signal strength measure. Ah, ok. Yes, I think we almost know how to make the bcm card report dBm instead. johannes - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
