2007.12.06
針對專題的第一個目標，直接傳送 (direct transmission)，也就是每個節點本身都會直接傳送資料到 Base ，雖然目
標是希望做出都不去經過其他節點，不過似乎礙於 routing 的關係，會有一些節點會去 via 其他節點，不過這種情形
發生的情況並不多，所以並不是很影響到整個模擬的進行。
程式寫法是每個節點的傳送、接收範圍設定很大，以至於可以涵蓋到 Base 的位置，這樣路由建立的時候就會直接
跟 Base 做連線以及傳送資料；接著再設定每個節點的傳輸消耗電量，以『距離』當參數下去設定傳送消耗的電量
，而傳送消耗的電量單位，目前是自己內定的，並且是以每一百公尺為一個單位下去設定。
# This script is created by NSG2 beta1
# <http://wushoupong.googlepages.com/nsg>
#===================================
# Simulation parameters setup
#===================================
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) 100 ;# max packet in ifq
set val(nn) 101 ;# number of mobilenodes
set val(rp) AODV ;# routing protocol
set val(x) 500 ;# X dimension of topography
set val(y) 500 ;# Y dimension of topography
set val(stop) 100.0 ;# time of simulation end
set val(batterymodel) Battery/Simple ;# battery model
set val(batterymonitor) "on"
set val(initialenergy) 5 ;# Initial battery capacity
# 傳送、接收範圍 1000 單位
Phy/WirelessPhy set freq_ 9.14e+08
Phy/WirelessPhy set RXThresh_ 1.42681e-12
Phy/WirelessPhy set CSThresh_ 1.42681e-12
Phy/WirelessPhy set Pt_ 0.28183815
#===================================
# Initialization
#===================================
# Create a ns simulator
set ns [new Simulator]
# Setup topography object
set topo [new Topography]
$topo load_flatgrid $val(x) $val(y)
create-god $val(nn)
# Open the NS trace file
set tracefile [open out.tr w]
$ns use-newtrace
$ns trace-all $tracefile
# Open the NAM trace file
set namfile [open out.nam w]
$ns namtrace-all $namfile
$ns namtrace-all-wireless $namfile $val(x) $val(y)
set chan [new $val(chan)];#Create wireless channel
#===================================
# Node-Config
#===================================
# 以每一百範圍為50個單位
proc Nodeconfig { range } {
global ns val topo chan
$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 \
-topoInstance $topo \
-agentTrace ON \
-routerTrace ON \
-macTrace ON \
-movementTrace ON \
-energyModel "EnergyModel" \
-initialEnergy $val(initialenergy) \
-sleepPower 0 \
-txPower [expr ($range/100)*50] \
-rxPower 1.0 \
-idlePower 0.001
}
#===================================
# Nodes Definition
#===================================
Nodeconfig 0 ;# Base 設定傳送消耗電量為零
set BB [$ns node]
$BB set X_ 0
$BB set Y_ 0
$BB set Z_ 0
$ns initial_node_pos $BB 50
#===================================
# Create (val(nn)-1) random nodes
#===================================
set rng [new RNG]
$rng seed 0
for {set i 0} {$i < $val(nn)-1} {incr i} {
set XX [$rng uniform 0 500] ;# 隨機的 X 座標
set YY [$rng uniform 0 500] ;# 隨機的 Y 座標
set s [expr $XX*$XX+$YY*$YY] ;# 計算(x,y)到(0,0)的長度
set g [expr $s/2]
for {set j 0} {$j<10} {incr j} {
set r [expr $s/$g]
set g [expr ($g+$r)/2] ;# g = sqrt(s)
}
#===================================
# Mobile node parameter setup
#===================================
Nodeconfig $g ;# 根據 node 到 base 的距離去設定傳送會消耗的電量
set n($i) [$ns node] ;# 建立 node
$n($i) set X_ $XX
$n($i) set Y_ $YY
$n($i) set Z_ 0.0
$ns initial_node_pos $n($i) 20
}
#===================================
# set Agent && Application
#===================================
for {set k 0} {$k < $val(nn)-1} {incr k} {
set udp($k) [new Agent/UDP]
set null($k) [new Agent/Null]
$ns attach-agent $n($k) $udp($k)
$ns attach-agent $BB $null($k)
$ns connect $udp($k) $null($k)
set cbr($k) [new Application/Traffic/CBR]
$cbr($k) attach-agent $udp($k)
$cbr($k) set type_ CBR
$cbr($k) set rate_ 1mb
$cbr($k) set packet_size_ 2000
$cbr($k) set random_ false
#===================================
# Random Variable
#===================================
set rng [new RNG]
$rng seed 0
# ======== Uniform Distribution ========
set RVstart [new RandomVariable/Uniform]
$RVstart use-rng $rng
$RVstart set min_ 0
$RVstart set max_ 1
set RVend [new RandomVariable/Uniform]
$RVend use-rng $rng
$RVend set min_ 50
$RVend set max_ 60
# ======== Uniform Distribution ========
#===================================
# Applications Definition
#===================================
set startT($k) [ expr [$RVstart value] ]
set endT($k) [ expr [$RVend value] ]
$ns at $startT($k) "$cbr($k) start"
$ns at $endT($k) "$cbr($k) stop"
}
#===================================
# Termination
#===================================
# Define a 'finish' procedure
proc finish {} {
global ns tracefile namfile
$ns flush-trace
close $tracefile
close $namfile
exec nam out.nam &
exit 0
}
for {set i 0} {$i < $val(nn)-1 } { incr i } {
$ns at $val(stop) "\$n($i) reset"
}
$ns at $val(stop) "$ns nam-end-wireless $val(stop)"
$ns at $val(stop) "finish"
$ns at $val(stop) "puts \"done\" ; $ns halt"
$ns run
歡迎對於 NS2 有研究或見解的同學、朋友可以一起討論 by Yo PM 07：16
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峰峰'ｓ 研究日誌 (8)
