I have pulled that code into the function ieee80211_rssadapt_choose
so that I can re-use it in ath(4), atw(4), and in other drivers.
In rssadapt(9), I have also created a struct ieee80211_rssadapt_expavgctl
that contains parameters for rate adaptation. When IEEE80211_RSSADAPT_DEBUG
is enabled, I will using sysctl to expose an ieee80211_rssadapt_expavgctl
for each wireless device.
Also in rssadapt(9), I have introduced an interpolate() macro which
makes the exponential-averaging code more compact.
Adaptation Strategy for IEEE 802.11 WLAN via Received Signal Strength
Measurement" by Javier del Prado Pavon and Sunghyun Choi. This
module should provide faster adaptation and higher throughput than
Lucent's rate-adaptation scheme.
Individual drivers need to be modified to use this module. Patches
for wi(4) are forthcoming.
dyoung