multi_udpflows_802_11e.tcl

在网络仿真模拟工具下实现支持QoS的MAC层EDCF协议

# globals and flags
set ns [new Simulator]

#number of nodes
set num_wired_nodes  1
set num_mobile_nodes 1
set num_bs_nodes     1 ;# number of base stations
set num_nodes [expr $num_wired_nodes + $num_mobile_nodes + $num_bs_nodes]
set bs_id $num_wired_nodes

# Parameter for wireless nodes
set opt(chan)           Channel/WirelessChannel    ;# channel type
set opt(prop)           Propagation/TwoRayGround   ;# radio-propagation model
set opt(netif)          Phy/WirelessPhy            ;# network interface type
set opt(mac)            Mac/802_11e                ;# MAC type
set opt(ifq)            Queue/DTail/PriQ    	   ;# interface queue type
set opt(ifqlen)         50
set opt(ll)             LL                         ;# link layer type
set opt(ant)            Antenna/OmniAntenna        ;# antenna model
set opt(ifqlen)         50                        ;# max packet in ifq
set opt(adhocRouting)   NOAH                      ;# routing protocol
set opt(x)		670	;# X dimension of the topography
set opt(y)		670		;# Y dimension of the topography

#smallko add the following two lines
Mac/802_11e set dataRate_  1Mb
Mac/802_11e set basicRate_ 1Mb 
Mac/802_11e set rst_cw_mode_ 0

#set up for hierarchical routing
#(needed for routing over a basestation)
$ns node-config -addressType hierarchical
AddrParams set domain_num_ 2          ;# domain number
lappend cluster_num 1 1               ;# cluster number for each domain 
AddrParams set cluster_num_ $cluster_num
lappend eilastlevel $num_wired_nodes [expr $num_mobile_nodes + $num_bs_nodes] ;# number of nodes for each cluster             
AddrParams set nodes_num_ $eilastlevel

#Open the nam trace file
set nf [open out.nam w]
$ns namtrace-all-wireless $nf $opt(x) $opt(y)
set ntr [open out.tr w]
$ns trace-all $ntr

set chan	[new $opt(chan)]
set topo	[new Topography]
$topo load_flatgrid $opt(x) $opt(y)

# Create God
create-god [expr $num_mobile_nodes + $num_bs_nodes]

# creating wired nodes
for {set i 0} {$i < $num_wired_nodes} {incr i} {
	set W($i) [$ns node 0.0.$i]
    puts "wired node $i created"
}


# creating base station
$ns node-config -adhocRouting $opt(adhocRouting) \
                 -llType $opt(ll) \
                 -macType $opt(mac) \
                 -ifqType $opt(ifq) \
                 -ifqLen $opt(ifqlen) \
                 -antType $opt(ant) \
                 -propType $opt(prop)    \
                 -phyType $opt(netif) \
                 -channel $chan      \
                 -topoInstance $topo \
                 -wiredRouting ON \
                 -agentTrace OFF \
                 -routerTrace OFF \
                 -macTrace OFF    \
                 -movementTrace OFF

set BS(0) [$ns node 1.0.0]
$BS(0) random-motion 0
puts "Base-Station node $bs_id created"
#provide some co-ord (fixed) to base station node
$BS(0) set X_ 1.0
$BS(0) set Y_ 2.0
$BS(0) set Z_ 0.0
 
# creating mobile nodes
$ns node-config -wiredRouting OFF
for {set i 0} {$i < $num_mobile_nodes} {incr i} {
                set wl_node_($i) [$ns node 1.0.[expr $i + 1]]	
		$wl_node_($i) random-motion 0		;# disable random motion
    puts "wireless node $i created ..."
    $wl_node_($i) base-station [AddrParams addr2id [$BS(0) node-addr]]
    $wl_node_($i) set X_ [expr $i * 10]
    $wl_node_($i) set Y_ [expr $i * 10]
    $wl_node_($i) set Z_ 0.0
}

# linking of root to base-station node
$ns duplex-link $W(0) $BS(0) 10Mb 2ms DropTail

# linking of wired nodes to root node
#for {set i 1} {$i < $num_wired_nodes} {incr i} {
#    $ns duplex-link $W($i) $W(0) 10Mb 2ms DropTail
#} 

set src_udp0 [new Agent/UDP]
$src_udp0 set class_ 0
$src_udp0 set prio_ 0
set dst_udp0 [new Agent/Null]
$ns attach-agent $wl_node_(0) $src_udp0
$ns attach-agent $W(0) $dst_udp0
set app0 [new Application/Traffic/CBR]
$app0 attach-agent $src_udp0
$ns connect $src_udp0 $dst_udp0
$ns at 0.0 "$app0 start" 

set src_udp1 [new Agent/UDP]
$src_udp1 set class_ 1
$src_udp1 set prio_ 1
set dst_udp1 [new Agent/Null]
$ns attach-agent $wl_node_(0) $src_udp1
$ns attach-agent $W(0) $dst_udp1
set app1 [new Application/Traffic/CBR]
$app1 attach-agent $src_udp1
$ns connect $src_udp1 $dst_udp1
$ns at 0.3 "$app1 start"

set src_udp2 [new Agent/UDP]
$src_udp2 set class_ 2
$src_udp2 set prio_ 2
set dst_udp2 [new Agent/Null]
$ns attach-agent $wl_node_(0) $src_udp2
$ns attach-agent $W(0) $dst_udp2
set app2 [new Application/Traffic/CBR]
$app2 attach-agent $src_udp2
$ns connect $src_udp2 $dst_udp2
$ns at 0.1 "$app2 start" 

set src_udp3 [new Agent/UDP]
$src_udp3 set class_ 3
$src_udp3 set prio_ 3
set dst_udp3 [new Agent/Null]
$ns attach-agent $wl_node_(0) $src_udp3
$ns attach-agent $W(0) $dst_udp3
set app3 [new Application/Traffic/CBR]
$app3 attach-agent $src_udp3
$ns connect $src_udp3 $dst_udp3
$ns at 0.2 "$app3 start" 

# Define node initial position in nam
for {set i 0} {$i < $num_mobile_nodes} {incr i} {
    $ns initial_node_pos $wl_node_($i) 20
   }

# Tell nodes when the simulation ends
for {set i 0} {$i < $num_mobile_nodes } {incr i} {
    $ns at 10.0 "$wl_node_($i) reset";
}

$ns at 100.0 "$BS(0) reset";
$ns at 100.0 "$app0 stop"
$ns at 100.0 "$app1 stop"
$ns at 100.0 "$app2 stop"
$ns at 100.0 "$app3 stop"
$ns at 110.0 "puts \"NS EXITING...\" ; $ns halt"

proc stop {} {
    global ns ntr nf
    close $ntr
    close $nf
}

# run the simulation
$ns run