wireless-shadowing-vis-test.tcl
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上传日期:2015-12-11
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文件大小:6k
源码类别:
通讯编程
开发平台:
Visual C++
- # Copyright (c) 2000 University of Southern California.
- # All rights reserved.
- #
- # Redistribution and use in source and binary forms are permitted
- # provided that the above copyright notice and this paragraph are
- # duplicated in all such forms and that any documentation, advertising
- # materials, and other materials related to such distribution and use
- # acknowledge that the software was developed by the University of
- # Southern California, Information Sciences Institute. The name of the
- # University may not be used to endorse or promote products derived from
- # this software without specific prior written permission.
- #
- # THIS SOFTWARE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED
- # WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
- # MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- #
- # Example test program for the visibility-based shadowing propagation model
- # Wei Ye, weiye@isi.edu, 2000
- # ======================================================================
- # Define options
- # ======================================================================
- set opt(chan) Channel/WirelessChannel
- #set opt(prop) Propagation/Shadowing
- 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(adhocRouting) DSDV
- set opt(x) 100 ;# X dimension of the topography
- set opt(y) 100 ;# Y dimension of the topography
- set opt(ifqlen) 50 ;# max packet in ifq
- set opt(seed) 0.0
- set opt(tr) shadowing-vis.tr ;# trace file
- set opt(nam) shadowing-vis.nam ;# nam trace file
- set opt(nn) 2 ;# how many nodes are simulated
- set opt(stop) 200.0 ;# simulation time
- # =====================================================================
- # Other default settings
- LL set mindelay_ 50us
- LL set delay_ 25us
- LL set bandwidth_ 0 ;# not used
- Agent/Null set sport_ 0
- Agent/Null set dport_ 0
- Agent/CBR set sport_ 0
- Agent/CBR set dport_ 0
- 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_ 0.5
- 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
- # below is original
- #Phy/WirelessPhy set RXThresh_ 3.652e-10
- # 95% pkts can be correctly received at 20m for 3/5.
- Phy/WirelessPhy set RXThresh_ 3.61705e-09
- Phy/WirelessPhy set bandwidth_ 2e6
- Phy/WirelessPhy set Pt_ 0.2818
- Phy/WirelessPhy set freq_ 914e+6
- Phy/WirelessPhy set L_ 1.0
- # Pt_ is transmitted signal power. The propagation model and Pt_ determines
- # the received signal power of each packet. The packet can not be correctly
- # received if received power is below RXThresh_.
- # ======================================================================
- # Main Program
- # ======================================================================
- #
- # Initialize Global Variables
- #
- # create simulator instance
- set ns_ [new Simulator]
- # set wireless channel
- #set wchan [new $opt(chan)]
- #define propagation models
- # pathlossExp_ is path-loss exponent, for predicting mean received power
- # std_db_ is shadowing deviation (dB), reflecting how large the propagation
- # property changes within the environment.
- # dist0_ is a close-in reference distance
- #
- set goodProp [new Propagation/Shadowing]
- $goodProp set pathlossExp_ 2.0
- $goodProp set std_db_ 3.0
- $goodProp set dist0_ 30.0
- $goodProp seed predef 0
- set badProp [new Propagation/Shadowing]
- $badProp set pathlossExp_ 3.0
- $badProp set std_db_ 5.0
- $badProp set dist0_ 1.0
- $badProp seed predef 1
- #visibility-based shadowing model: line of sight or not using a bitmap
- set prop [new Propagation/ShadowingVis]
- $prop get-bitmap environment.pnm
- # set number of pixels per meter
- $prop set-ppm 5
- # add previously defined models
- $prop add-models $goodProp $badProp
- # define topology
- set wtopo [new Topography]
- $wtopo load_flatgrid $opt(x) $opt(y)
- # create trace object for ns and nam
- set tracefd [open $opt(tr) w]
- set namtrace [open $opt(nam) w]
- $ns_ trace-all $tracefd
- $ns_ namtrace-all-wireless $namtrace $opt(x) $opt(y)
- # use new trace file format
- $ns_ use-newtrace
- #
- # Create God
- #
- set god_ [create-god $opt(nn)]
- #
- # define how node should be created
- #
- #global node setting
- $ns_ node-config -adhocRouting $opt(adhocRouting)
- -llType $opt(ll)
- -macType $opt(mac)
- -ifqType $opt(ifq)
- -ifqLen $opt(ifqlen)
- -antType $opt(ant)
- -propInstance $prop
- -phyType $opt(netif)
- -channel [new $opt(chan)]
- -topoInstance $wtopo
- -agentTrace OFF
- -routerTrace OFF
- -macTrace ON
- #
- # Create the specified number of nodes [$opt(nn)] and "attach" them
- # to the channel.
- for {set i 0} {$i < $opt(nn) } {incr i} {
- set node_($i) [$ns_ node]
- }
- #
- # Define node positions
- #
- # line of sight
- $node_(0) set X_ 0.0
- $node_(0) set Y_ 50.0
- $node_(0) set Z_ 0.0
- $node_(1) set X_ 0.0
- $node_(1) set Y_ 100.0
- $node_(1) set Z_ 0.0
- # obstructed
- $ns_ at 50.0 "$node_(1) set X_ 70.0"
- $ns_ at 50.0 "$node_(1) set Y_ 80.0"
- # line of sight
- $ns_ at 100.0 "$node_(1) set X_ 20.0"
- $ns_ at 100.0 "$node_(1) set Y_ 50.0"
- # obstructed
- $ns_ at 150.0 "$node_(1) set X_ 60.0"
- $ns_ at 150.0 "$node_(1) set Y_ 5.0"
- set udp_(0) [new Agent/UDP]
- $ns_ attach-agent $node_(0) $udp_(0)
- set null_(0) [new Agent/Null]
- $ns_ attach-agent $node_(1) $null_(0)
- set cbr_(0) [new Application/Traffic/CBR]
- $cbr_(0) set packetSize_ 128
- $cbr_(0) set interval_ 5.0
- $cbr_(0) set random_ 1
- $cbr_(0) set maxpkts_ 100
- $cbr_(0) attach-agent $udp_(0)
- $ns_ connect $udp_(0) $null_(0)
- $ns_ at 1.0 "$cbr_(0) start"
- # 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 "Starting Simulation..."
- $ns_ run