Thread (66 messages) 66 messages, 6 authors, 2008-12-11

Re: RFC Patch: Add signal strength to nl80211station info

From: Johannes Berg <johannes@sipsolutions.net>
Date: 2008-11-26 08:32:22

On Wed, 2008-11-26 at 06:21 +0100, Marcel Holtmann wrote:
Hi Johannes,
quoted
quoted
+	NL80211_STA_INFO_SIGNAL,
+	NL80211_STA_INFO_NOISE,
+	NL80211_STA_INFO_QUAL,
Sorry, no, this WEXT junk is just too undefined to put it into  
nl80211.
I know that WEXT were pretty bad in describing what to expect from  
these values and every driver did whatever it thought it would be  
best. Can we not just try to define how these values should be filled  
in and then either mark drivers as broken or try to fix them? Just an  
idea.
But it doesn't even physically make sense. The noise is not per station
but rather per channel, if you know it at all. The "quality" is simply
not defined, and would usually be "signal", unless you're doing
something else to estimate "quality", like taking into account
retransmissions, ... And then signal/noise should be in dBm.

johannes

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