hi all,
i m using following procedure to create poisson traffic. i want to compute
probability of a packet arrive per unit time. but i dont know which
parameter lambda and how can i compute PMF and CDF of this poisson
distribution.
Does someone help me??
Regards,
Bilge
My tcl script;
.I m calling poisson traffic procedure with this line ;
eval $val(traffic)traffic 25 0 0.2 $appTime2 ; this means node 25
start sending packet at appTime2 with 0.2 interval.
And the procedure;
proc poissontraffic { src dst interval starttime } {
global ns_ node_
set udp($src) [new Agent/UDP]
eval $ns_ attach-agent \$node_($src) \$udp($src)
set null($dst) [new Agent/Null]
eval $ns_ attach-agent \$node_($dst) \$null($dst)
set expl($src) [new Application/Traffic/Exponential]
eval \$expl($src) set packetSize_ 70
eval \$expl($src) set burst_time_ 0
eval \$expl($src) set idle_time_ [expr $interval*1000.0-70.0*8/250]ms ;#
idle_time + pkt_tx_time = interval
eval \$expl($src) set rate_ 250k
eval \$expl($src) attach-agent \$udp($src)
eval $ns_ connect \$udp($src) \$null($dst)
$ns_ at $starttime "$expl($src) start"
}
