# usage.txt, Dec 2014 Padua, Massaro Michele

How to use VoAP on your configurations:

To enable VoAP some variables must be added on your .tcl file:
- set VoAP yes
- set tcp_calc_time 0.2 (0.2 is the standard gap in seconds between each bandwidth estimation computation)
- set num_tcp <number of TCP flows>
- if you also want to use SAP-LAW, add for each TCP flow (starting from one):
	set rtt_tcp(1) <RTT of first flow>
	set rtt_tcp(2) <RTT of second flow>
	...
- set gateway_ <Gateway variable>
- set val(ifqlen) <queue size>  (50 by default)
- set threshold1 0.005 (alpha threshold)
- set threshold2 0.015 (beta threshold)

workfile.tcl contains a working example.

To compare results with SAP-LAW and New Reno, the algorithm can be changed replacing "set VoAP yes" with "set nsl yes" for SAP-LAW, and "set noAlg yes" for New Reno.

For every different configuration, the ID of the MAC layer of the gateway must be manually modified in the ns-2.34/mac/mac-802_11.cc. In order to do that you have to:
- find the ID of the MAC layer adding in your .tcl file those two lines:
	set valm [$gateway_ set mac_(0)]
	puts "mac_0: $valm"
In the output you will find the line "mac_0: _oXX", where XX are two numbers.
- At line 1291 of mac-802_11.cc replace the _o70 with the ID that you found on your previous step
- With a terminal, enter in the directory /*ns path*/ns-allinone-2.34/ns-2.34/ and execute the command "make".