English
- # simple directed diffusion example
- # This example tests directed diffusion in 2 simple scenarios
- # (1) where all 3 nodes can hear each other and a source and sink application pair is setup on two of the nodes.
- # and
- # (2) where node0 and node2 donot hear one another and communicats thru the third node1. src and snk apps reside on node 0 and node2.
- # ==================================================================
- # Define options
- # ===================================================================
- set opt(chan) Channel/WirelessChannel
- set opt(prop) Propagation/TwoRayGround
- set opt(netif) Phy/WirelessPhy
- set opt(mac) Mac/802_11
- set opt(ifq) Queue/DropTail/PriQueue
- set opt(ll) LL
- set opt(ant) Antenna/OmniAntenna
- set opt(filters) GradientFilter ;# options can be one or more of
- ;# TPP/OPP/Gear/Rmst/SourceRoute/Log/TagFilter
- set opt(x) 670 ;# X dimension of the topography
- set opt(y) 670 ;# Y dimension of the topography
- set opt(ifqlen) 50 ;# max packet in ifq
- set opt(nn) 3 ;# number of nodes
- set opt(seed) 0.0
- set opt(stop) 50 ;# simulation time
- set opt(prestop) 19 ;# time to prepare to stop
- set opt(tr) "diffusion.tr" ;# trace file
- set opt(nam) "diffusion.nam" ;# nam file
- set opt(adhocRouting) Directed_Diffusion
- #set opt(traf) "diffusion-traf.tcl" ;# traffic file
- # ==================================================================
- LL set mindelay_ 50us
- LL set delay_ 25us
- LL set bandwidth_ 0 ;# not used
- Queue/DropTail/PriQueue set Prefer_Routing_Protocols 1
- # unity gain, omni-directional antennas
- # set up the antennas to be centered in the node and 1.5 meters above it
- Antenna/OmniAntenna set X_ 0
- Antenna/OmniAntenna set Y_ 0
- Antenna/OmniAntenna set Z_ 1.5
- Antenna/OmniAntenna set Gt_ 1.0
- Antenna/OmniAntenna set Gr_ 1.0
- # Initialize the SharedMedia interface with parameters to make
- # it work like the 914MHz Lucent WaveLAN DSSS radio interface
- Phy/WirelessPhy set CPThresh_ 10.0
- Phy/WirelessPhy set CSThresh_ 1.559e-11
- Phy/WirelessPhy set RXThresh_ 3.652e-10
- Phy/WirelessPhy set Rb_ 2*1e6
- Phy/WirelessPhy set Pt_ 0.2818
- Phy/WirelessPhy set freq_ 914e+6
- Phy/WirelessPhy set L_ 1.0
- # ==================================================================
- # Main Program
- # =================================================================
- #
- # Initialize Global Variables
- #
- set ns_ [new Simulator]
- set topo [new Topography]
- set tracefd [open $opt(tr) w]
- $ns_ trace-all $tracefd
- set nf [open $opt(nam) w]
- $ns_ namtrace-all-wireless $nf $opt(x) $opt(y)
- #$ns_ use-newtrace
- $topo load_flatgrid $opt(x) $opt(y)
- set god_ [create-god $opt(nn)]
- # log the mobile nodes movements if desired
- #if { $opt(lm) == "on" } {
- # log-movement
- #}
- #global node setting
- $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)
- -channelType $opt(chan)
- -topoInstance $topo
- -diffusionFilter $opt(filters)
- -agentTrace ON
- -routerTrace OFF
- -macTrace ON
- # Create the specified number of nodes [$opt(nn)] and "attach" them
- # to the channel.
- for {set i 0} {$i < $opt(nn) } {incr i} {
- set node_($i) [$ns_ node $i]
- $node_($i) color black
- $node_($i) random-motion 0 ;# disable random motion
- $god_ new_node $node_($i)
- }
- puts "Loading connection pattern..."
- $node_(0) set X_ 500.716707738489
- $node_(0) set Y_ 620.707335765875
- $node_(0) set Z_ 0.000000000000
- $node_(1) set X_ 320.192740186325
- $node_(1) set Y_ 450.384818286195
- $node_(1) set Z_ 0.000000000000
- # 3rd node in hearing range of other two
- #$node_(2) set X_ 477.438972165239
- #$node_(2) set Y_ 545.843469852367
- #$node_(2) set Z_ 0.000000000000
- #3rd node NOT in hearing range of other two
- $node_(2) set X_ 177.438972165239
- $node_(2) set Y_ 245.843469852367
- $node_(2) set Z_ 0.000000000000
- #Diffusion src application
- set src_(0) [new Application/DiffApp/PingSender/TPP]
- $ns_ attach-diffapp $node_(0) $src_(0)
- $ns_ at 0.123 "$src_(0) publish"
- # another diff application
- #set src_(1) [new Application/DiffApp/PingSender/TPP]
- #$ns_ attach-diffapp $node_(1) $src_(1)
- #$ns_ at 1.3 "$src_(1) publish"
- #Diffusion sink application
- set snk_(0) [new Application/DiffApp/PingReceiver/TPP]
- $ns_ attach-diffapp $node_(2) $snk_(0)
- $ns_ at 1.456 "$snk_(0) subscribe"
- # Define node initial position in nam
- for {set i 0} {$i < $opt(nn)} {incr i} {
- # 20 defines the node size in nam, must adjust it according to your scenario
- # The function must be called after mobility model is defined
- $ns_ initial_node_pos $node_($i) 20
- }
- #
- # Tell nodes when the simulation ends
- #
- for {set i 0} {$i < $opt(nn) } {incr i} {
- $ns_ at $opt(stop).000000001 "$node_($i) reset";
- }
- # tell nam the simulation stop time
- $ns_ at $opt(stop) "$ns_ nam-end-wireless $opt(stop)"
- $ns_ at $opt(stop).000000001 "puts "NS EXITING..." ; $ns_ halt"
- puts $tracefd "Directed Diffusion:"
- puts $tracefd "M 0.0 nn $opt(nn) x $opt(x) y $opt(y)"
- puts $tracefd "M 0.0 prop $opt(prop) ant $opt(ant)"
- puts "Starting Simulation..."
- $ns_ run
