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|
##
set seed 0
set packetsize 245
set nn 300 ;# number of nodes
set cnn [expr $nn -2 ] ;# number of clients
set plottime 15000.0
ns-random $seed
##user start time from a poisson distribution
set starttime(2) 0
#set tmp [new RandomVariable/Exponential] ;# Poisson process
#$tmp set avg_ 5.4674 ;# average arrival interval
#artificially syncronize flow start time
#every flow starts at multiple of 1.8s
set tmp [new RandomVariable/Empirical]
$tmp loadCDF userintercdf1
for {set i 3} {$i < $nn} {incr i} {
set p [$tmp value]
set i1 [expr $i - 1 ]
set starttime($i) [expr $starttime($i1) + $p ]
}
##number of sequential flow per user
set rv0 [new RandomVariable/Empirical]
$rv0 loadCDF sflowcdf
##flow duration
set rv1 [new RandomVariable/Empirical]
$rv1 loadCDF flowdurcdf
for {set i 2} {$i < $nn} {incr i} {
set q [$rv0 value]
set sflow($i) [expr int($q) ]
puts "node $i has $sflow($i) flow "
set p [$rv1 value]
set dur($i) [expr $p * 60 ]
puts "node $i duration : $dur($i)"
}
for {set i 2} {$i < $nn} {incr i} {
set flowstoptime($i) [expr $starttime($i) + $dur($i) ]
}
set ns [new Simulator]
for {set i 0} {$i < $nn} {incr i} {
set n($i) [$ns node]
}
set f [open /usr/RAtrace/newout.tr w]
$ns trace-all $f
$ns duplex-link $n(0) $n(1) 1.5Mb 10ms DropTail
for {set j 2} {$j < $nn} {incr j} {
$ns duplex-link $n(0) $n($j) 10Mb 5ms DropTail
}
set rv2 [new RandomVariable/Empirical]
$rv2 loadCDF ontimecdf
set rv3 [new RandomVariable/Empirical]
$rv3 loadCDF fratecdf
for {set i 2} {$i < $nn} {incr i} {
set s($i) [new Agent/UDP]
$ns attach-agent $n(1) $s($i)
set null($i) [new Agent/Null]
$ns attach-agent $n($i) $null($i)
$ns connect $s($i) $null($i)
set realaudio($i) [new Application/Traffic/RealAudio]
$realaudio($i) set packetSize_ $packetsize
$realaudio($i) set burst_time_ 0.05ms
$realaudio($i) set idle_time_ 1800ms
set flow_rate [$rv3 value]
set r [ format "%fk" $flow_rate ]
puts "node $i flow rate $r"
$realaudio($i) set rate_ $r
$realaudio($i) attach-agent $s($i)
}
for {set i 2} {$i < $nn} {incr i} {
$ns at $starttime($i) "$realaudio($i) start"
$ns at $flowstoptime($i) "$realaudio($i) stop"
puts "node $i starttime $starttime($i)"
puts "node $i stoptime $flowstoptime($i)"
##schedule for next flow
for {set h 2} {$h <= $sflow($i)} {incr h} {
set starttime($i) [expr $flowstoptime($i) + 0.001 ]
set p [$rv1 value]
set dur($i) [expr $p * 60 ]
puts "node $i duration : $dur($i)"
set flowstoptime($i) [expr $starttime($i) + $dur($i) ]
set realaudio($i) [new Application/Traffic/RealAudio]
$realaudio($i) set packetSize_ $packetsize
$realaudio($i) set burst_time_ 0.05ms
$realaudio($i) set idle_time_ 1800ms
set flow_rate [$rv3 value]
set r [ format "%fk" $flow_rate ]
puts "node $i flow rate $r"
$realaudio($i) set rate_ $r
$realaudio($i) attach-agent $s($i)
}
}
$ns at $plottime "close $f"
$ns at $plottime "finish tg"
proc finish file {
#exec rm -f out.time.tr
#
#
exec awk {
{
if (($1 == "+") && ($3 == 1) ) \
print $2, $10
}
} /usr/RAtrace/newout.tr > RA.time.tr
}
$ns run
exit 0
|
