PID controller based rate control algorithm

configname: CONFIG_MAC80211_RC_PID

Linux Kernel Configuration
└─>Networking support
└─>Wireless
└─>PID controller based rate control algorithm
In linux kernel since version 2.6.25 (release Date: 2008-04-16)  
This option enables a TX rate control algorithm for
mac80211 that uses a PID controller to select the TX
rate.