Awesome

REACT over IEEE 802.11

REACT over IEEE802.11 (aka REACT80211) is a proposed solution for mitigating the performance impairments of CSMA/CA protocols in multi-hop topologies based on the dynamic adaptation of the contention process experienced by nodes in a wireless network. A distributed protocol is used to negotiate the channel airtime for a node as a function of the traffic requirements of its neighbourhood, taking into account bandwidth reserved for the control operations. A mechanism is provided for a node to tune its contention window depending on its allocated airtime. Different from previous schemes, a node's contention window is fixed in size unless the traffic requirements of its neighbourhood change. The scheme is implemented on legacy commercial 802.11 devices supporting ath9k driver.

fabfile.py is the configuration script for fabric
react.py is the react module which must be run on each node. we need to add a function on fabfile.py to perform a global configuration on nodes
node_info.txt a csv-like configuration file with topology description

INSTALLATION

git clone https://github.com/fabriziogiuliano/react80211.git
cd react80211/backports-wireless
sh build.sh #first time
sh build.sh --load-module #if build succesfully
cd ../

setup network

fab -u fabrizio network:freq=5180

run REACT

mkdir data #first time
fab -u $(whoami) run_react:bw_req=6000,enable_react='YES'

run IPERF TEST

fab -u $(whoami) run_trial:'mytest','YES'

logs are collected inside data/ directory

stop test

fab -u $(whoami) stop_react stop_iperf

IP.csv log structure

time.time(),dd,data_count,rts_count,busytx2,gross_rate,avg_tx,freeze2,freeze_predict,tx_goal,I,cw,cw_,psucc,thr

1481127059.3170,1.0000,44.0000,55.0000,0.0937,0.2667,0.0017,0.8749,0.7079,156.6048,0.0000,36.0885,31.0000,0.8000,0.5174
1481127060.1606,1.0000,46.0000,48.0000,0.0975,0.2667,0.0020,0.8958,0.7279,131.3171,0.0000,9.2071,15.0000,0.9583,0.5410
1481127061.2382,1.0000,155.0000,162.0000,0.3285,0.2667,0.0020,0.6606,0.7214,131.5241,0.0000,20.1757,15.0000,0.9568,1.8228
1481127062.1654,1.0000,308.0000,323.0000,0.6527,0.2667,0.0020,0.3255,0.6873,131.9594,0.0000,77.5323,63.0000,0.9536,3.6221
1481127063.2013,1.0000,187.0000,234.0000,0.3980,0.2667,0.0017,0.5356,0.6525,156.7678,0.0000,114.5603,127.0000,0.7991,2.1991
1481127064.2528,1.0000,75.0000,99.0000,0.1599,0.2667,0.0016,0.7835,0.6839,165.1249,0.0000,66.4639,63.0000,0.7576,0.8820

TODO

add link estimation tests

python link_test.py # receive and collect success probability
python link_test.py -e #send broadcast pkt