ns模拟3

# Define options
set val(chan)           Channel/WirelessChannel    ;# channel type
set val(prop)           Propagation/TwoRayGround   ;# radio-propagation model
set val(netif)          Phy/WirelessPhy            ;# network interface type
set val(mac)            Mac/802_11                 ;# MAC type
set val(ifq)            Queue/DropTail/PriQueue    ;# interface queue type
set val(ll)             LL                         ;# link layer type
set val(ant)            Antenna/OmniAntenna        ;# antenna model
set val(ifqlen)         50                         ;# max packet in ifq
set val(nn)             8                          ;# number of mobilenodes
set val(rp)             AODV                       ;# routing protocol
set val(x)              1200                              ;# X dimension of topography
set val(y)              1200                              ;# Y dimension of topography  
set val(stop)            2                           ;# time of simulation end

set ns                  [new Simulator]
set tracefd       [open simple.tr w]
set namtrace      [open simwrls.nam w]   

$ns trace-all $tracefd
$ns namtrace-all-wireless $namtrace $val(x) $val(y)

#set different colors for data flows
$ns color 0 Blue
$ns color 1 Red

# set up topography object
set topo       [new Topography]

$topo load_flatgrid $val(x) $val(y)

set chan_1 [new $val(chan)]
create-god $val(nn)

#
#  Create nn mobilenodes [$val(nn)] and attach them to the channel.
#

# configure the nodes
        $ns node-config -adhocRouting $val(rp) \
                         -llType $val(ll) \
                         -macType $val(mac) \
                         -ifqType $val(ifq) \
                         -ifqLen $val(ifqlen) \
                         -antType $val(ant) \
                         -propType $val(prop) \
                         -phyType $val(netif) \
                         -channel $chan_1 \
                         -topoInstance $topo \
                         -agentTrace ON \
                         -routerTrace ON \
                         -macTrace ON \
                         -movementTrace OFF

set node_(0) [$ns node]
$node_(0) color black
set node_(1) [$ns node]
$node_(1) color black

$ns at 0.0 "$node_(0) color red"
$ns at 0.0 "$node_(1) color red"
$node_(0) set X_ 370.71
$node_(0) set Y_ 270.71
$node_(0) set Z_ 0.0

$node_(1) set X_ 529.29
$node_(1) set Y_ 429.29
$node_(1) set Z_ 0.0

Phy/WirelessPhy set Pt_ 7.214e-3
set chan_2 [new $val(chan)]
$ns node-config \
    -channel $chan_2

for {set i 2} {$i <= 8 } { incr i } {
set node_($i) [$ns node]       
}

# Provide initial location of mobilenodes
 for {set i 2} {$i <= 8 } { incr i } {
    if {$i<=5} {
        $node_($i) set X_ [expr 200.0+($i-1)*100.0]
        $node_($i) set Y_ 200
    } else {
        $node_($i) set X_ 600
        $node_($i) set Y_ [expr 200+($i-5)*100.0]
    }       
 $node_($i) set Z_ 0.0
 }

# Generation of movements
$ns at 110.0 "$node_(0) setdest 124.0 272.0 30.0"
$ns at 110.0 "$node_(1) setdest 45.0 285.0 50.0"
$ns at 110.0 "$node_(0) setdest 480.0 300.0 5.0"

# Set a TCP connection between node_(0) and node_(1)
set tcp [new Agent/TCP/Newreno]
$tcp set class_ 2
set sink [new Agent/TCPSink]
$ns attach-agent $node_(0) $tcp
$ns attach-agent $node_(1) $sink
$ns connect $tcp $sink
set ftp [new Application/FTP]
$ftp attach-agent $tcp
$ftp set fid_ 1
$ns at 0.3 "$ftp start"

# Define node initial position in nam
for {set i 0} {$i <= $val(nn)} { incr i } {
# 30 defines the node size for nam
$ns initial_node_pos $node_($i) 30
}

# Telling nodes when the simulation ends
for {set i 0} {$i < $val(nn) } { incr i } {
    $ns at $val(stop) "$node_($i) reset";
}

# ending nam and the simulation
$ns at $val(stop) "$ns nam-end-wireless $val(stop)"
$ns at $val(stop) "stop"
$ns at 2.01 "puts \"end simulation\" ; $ns halt"
proc stop {} {
    global ns tracefd namtrace
    $ns flush-trace
    close $tracefd
    close $namtrace
    exec nam simwrls.nam &
}

$ns run