G-ORS

G-ORS is a rate adaptation algorithm for wireless system with MIMO, where it optimally learns and selects the best stream mode and MCS level for transmission and its optimality is proved in [Infocom2014]. Here we provide an implementation of G-ORS in the following system setting:

• Wireless Device Driver: Ath9k
• Test Kernel Version: Linux-3.11.6
• Test Operation System: Ubuntu12.04
• Supported Standard: IEEE 802.11n
• Supported Operation Mode: single-stream(SS), double-stream(DS)

Our device driver developed based on backports package release 3.11.6-1. In particular, the main code is ~/net/mac80211/rc80211_ors_ht.c.

1.Download and extract the driver source code.

# tar -xvf ORS_backports-3.11.6-1.tar.bz2 

2. Compile the G-ORS source code. (linux-headers needs to be installed before you compile the code.)

# make defconfig-ath9k 

# make menuconfig 

   |---[ ] PID controller based rate control algorithm 

   |---[*] Optimal Rate Selection (ORS) 

   |---[*] ORS 802.11n support 

   |---[ ] Minstrel 

   |---[*] Wireless LAN 

         |---Atheros Wireless Cards 

               |---[*]Atheros ath9k debugging 

               |---[ ]Atheros ath9k rate control 

# sudo make install 

3. Insert G-ORS module.

# sudo rmmod ath9k ath9k_common ath9k_hw ath mac80211 cfg80211 compat 

# sudo modprobe ath9k 

4. Enjoy G-ORS. You can check the improvement via iperf.