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Next: Trace file generator Up: Installation of video-streaming implementations Previous: RTP/RTCP installation

MPEG2 sender/receiver installation

In order to install the MPEG2 sender/receiver implementation, we have to decompress the file "ns-mpeg_v2.tar.gz". Then, move the folder "ns-mpeg_v2" into the folder where the source of the simulator is stored, i.e. ns-2.xx (where xx is the version of the ns-2 simulator installed). After this, it is necessary to modify the file "", in order to add the source files of the MPEG2 application. These are the steps to follow:

  1. Add the following lines to "" at the "OBJ_CC" section (but before the line "@V_STLOBJ@"):
    ns-mpeg_v2/mpegdata_v2.o $\backslash$
    ns-mpeg_v2/mpegnulldata.o $\backslash$
    ns-mpeg_v2/mpegdatafile.o $\backslash$
    ns-mpeg_v2/mpeggen_vIPB.o $\backslash$
    ns-mpeg_v2/mpeg2RX2_vIPB.o $\backslash$
  2. Add "-I/ns-mpeg_v2" to the "INCLUDES = " section at the beginning of ""
  3. Exit, saving changes.
  4. Copy files "" and "ns-process.h" to folder "ns-2.xx/common/".
  5. Run "make".

Once it is finished, a new binary file named "ns" in the ns-2.xx will be available with the new MPEG2 sender/receiver implementation. Set configuration settings related to this MPEG application in the TCL simulation file as shown in the script shown below. This is a complex simulation using simultaneously RTP/RTCP implementation, MMDSR (a modification of plain DSR) and the MPEG2 TX/RX application. You must follow the lines related to "new Application/Traffic/Mpeg2Gen2" and "new Application/Mpeg2RX2".

# Multipath simulations with MM-DSR and 802.11e

set escenario [lindex $argv 0]

# ======================================================================
# Fixed options
# ======================================================================
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(mac)           Mac/802_11                 ;# MAC type
#set opt(ifq)           CMUPriQueue                ;# interface queue type
set opt(ll)             LL                         ;# link layer type
set opt(ant)            Antenna/OmniAntenna        ;# antenna model
set opt(CBRpsize)       1500 ;# Packet size 
set opt(CBRrate)        1000000 ;# CBR rate in bps.
set NumofSources 	1

# Invalidated parameter when using DSR!
set opt(ifqlen)         50 ;# max packet in ifq, it is the MAC queue size
# To modify it, change IFQLEN in dsr-priqueue.h!

#Queue set limit_  1000
set num_nodes 		50
set opt(NumOfMN)        $num_nodes ;# number of mobilenodes

set opt(RoutingProtocol) DSR ;# routing protocol
# DSR has 4 different physical queues: queue size set in dsr-priqueue.h

set opt(X)	        520  ;# X & Y dimension of the topography
set opt(Y)	        520
set opt(MNcoverage)     120
set opt(speed)          2
set opt(start)          0
set opt(stop)           100

Mac/802_11e set dataRate_          11.0e6            ;# 11Mbps
Mac/802_11e set basicRate_         11.0e6            ;# (1Mbps)
Mac/802_11e set bandwidth_         11.0e6            ;# (1Mbps)

# Computes the necessary power fot a given coverage (the cell radius)
proc SetPt { coverage } {
  set Gt [Antenna/OmniAntenna set Gt_]
  set Gr [Antenna/OmniAntenna set Gr_]
  set ht [Antenna/OmniAntenna set Z_]
  set hr [Antenna/OmniAntenna set Z_]
  set RXThresh [Phy/WirelessPhy set RXThresh_]
  set d4 [expr pow($coverage,4)]
  set Pt [expr ($RXThresh*$d4)/($Gt*$Gr*$ht*$ht*$hr*$hr)]
  return $Pt

Phy/WirelessPhy set L_ 1.0 			
Phy/WirelessPhy set freq_ 2.472e9	
Phy/WirelessPhy set bandwidth_ 11Mb		
#Phy/WirelessPhy set Pt_ 0.031622777
Phy/WirelessPhy set CPThresh_ 10.0		
Phy/WirelessPhy set CSThresh_ 5.011872e-12	
Phy/WirelessPhy set RXThresh_ 5.82587e-09	
Phy/WirelessPhy set Pt_ [SetPt $opt(MNcoverage)]
puts "Pt_ ==========  $[SetPt $opt(MNcoverage)]"

# 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  
Antenna/OmniAntenna set Gr_ 1

set ns_ [new Simulator]

set trace [open "" w]
$ns_ trace-all $trace
$ns_ use-newtrace
set namtrace [open animation.nam w]
$ns_ namtrace-all-wireless $namtrace $opt(X) $opt(Y)

set topo [new Topography]
$topo load_flatgrid $opt(X) $opt(Y)
set god [create-god $opt(NumOfMN)]

set chan_1_ [new $opt(chan)]

$ns_ node-config \
    -mobileIP OFF \
    -adhocRouting $opt(RoutingProtocol) \
    -llType $opt(ll) \
    -macType $opt(mac) \
    -ifqType $opt(ifq) \
    -ifqLen $opt(ifqlen) \
    -antType $opt(ant) \
    -propType $opt(prop) \
    -phyType $opt(netif) \
    -channel $chan_1_ \
    -topoInstance $topo \
    -agentTrace ON \
    -routerTrace ON \
    -macTrace OFF \
    -movementTrace ON \
    -wiredRouting OFF

# Connets upper and lower MNs:
Agent/Null set sport_		0
Agent/Null set dport_		0
Agent/CBR set sport_		0
Agent/CBR set dport_		0

set opt(CBRperiod)  [expr 8.0 * double($opt(CBRpsize)+20) / double($opt(CBRrate))]

$ns_ color 1 Blue
$ns_ color 2 Green
$ns_ color 3 Red
$ns_ color 4 Yellow

Agent/RTP_v2 set sport_		0
Agent/RTP_v2 set dport_		0
Agent/RTCP_v2 set sport_	0
Agent/RTCP_v2 set dport_	0

set rng [new RNG]
set opt(seed) 0.1
$rng seed $opt(seed)

for {set i 0} {$i < $opt(NumOfMN)} {incr i} {
	set node_($i) [$ns_ node]

puts "Loading scenario file..."
set opt(sc) $escenario

source $opt(sc)
puts "Load complete..."

for {set i 0} {$i < $opt(NumOfMN)} {incr i} {

    $node_($i) set RTPsource_ 0
    $node_($i) set RTPdestination_ 0


set tmp 0.011
set start_tx_time 4
set selfs 0

for {set i 0} {$i < $NumofSources} {incr i} {

	set n [expr {$i + 20}]
	$node_($i) set RTPsource_ 1
	$node_($n) set RTPdestination_ 1
	$node_($i) set MMDSRfreq_ 14
	# average speed of the nodes
	$node_($i) set mu_ 5
	puts "RTPsource $i"
	puts "RTPdestination $n"

	set trace_file_($i) [new MpegDataFile_v2]

	$trace_file_($i) metafile /home/vico/ns2/adhoc/e/blade2.mdipbf4444
	$trace_file_($i) datafile /home/vico/ns2/adhoc/e/blade.m2v

	set rtp_($i) [new Agent/RTP_v2]
	$ns_ attach-agent $node_($i) $rtp_($i)
	$rtp_($i) set class_ 2
	$rtp_($i) set seqno_ 0
	$rtp_($i) set packetSize_ 1500
	$rtp_($i) set multipath_ 3
	$rtp_($i) set flow_id_ $i
	$rtp_($i) set prio_ 0
	$rtp_($i) set ptype_ 1

	set rtcp_($n) [new Agent/RTCP_v2] 
	$ns_ attach-agent $node_($n) $rtcp_($n)
	$rtcp_($n) set class_ 3
	$rtcp_($n) set interval_ 1000ms
	$rtcp_($n) set seqno_ 0
	$rtcp_($n) set flow_id_ $n

	set rtp_($n) [new Agent/RTP_v2]
	$ns_ attach-agent $node_($n) $rtp_($n)
	$rtp_($n) set class_ 2
	$rtp_($n) set seqno_ 0
	$rtp_($n) set packetSize_ 1500
	$rtp_($n) set flow_id_ $n

	# Variable for RTCP: 0-> not in use, 1-> in use
	$rtp_($i) set rtcp_in_use_ 1

	$ns_ connect $rtp_($i) $rtcp_($n)
	$ns_ attach-agent $node_($n) $rtcp_($n)

	set MPEG2_($i) [new Application/Traffic/Mpeg2Gen2]
	$MPEG2_($i) attach-mpegdatasrc $trace_file_($i) 
	$MPEG2_($i) attach-agent $rtp_($i) 
	#0: without codification
	#1: all data through the same path
	#2: I+B path 1, P path 2
	#3: Even I, P, B frames by path 1, odd B frames by path 2
	#4: I / P / B, each one through a different path (Multipath of 3) */
	$MPEG2_($i) set codification_ 4
	$rtp_($i) set codification_ 4

	set sinkmpeg_($n) [new Application/Mpeg2RX2]
	$sinkmpeg_($n) attach-agent $rtcp_($n)
	$sinkmpeg_($n) attach-agent $rtp_($n)
	$sinkmpeg_($n) dumpfile "$i.multipath_video.m2v"  

	set self_($i) [new Session/RTP] 
	$rtcp_($n) session $self_($i) 
	$rtp_($i) session $self_($i)
	$rtp_($n) session $self_($i)
	set udp_($i) [new Agent/UDP]
	$ns_ attach-agent $node_($i) $udp_($i)
	set null_($n) [new Agent/LossMonitor]
	$ns_ attach-agent $node_($n) $null_($n)
	set cbr_($i) [new Application/Traffic/CBR]
	$cbr_($i) set packetSize_ $opt(CBRpsize)
	$cbr_($i) set interval_  $opt(CBRperiod)
	$cbr_($i) set random_ 1
	$udp_($i) set prio_ 3
	$udp_($i) set ptype_ 2
	$cbr_($i) set CBRrate $opt(CBRrate)
	$cbr_($i) attach-agent $udp_($i)
	$ns_ connect $udp_($i) $null_($n)
	$udp_($i) set fid_ 4
	$ns_ at $start_tx_time "$cbr_($i) start"
	#$ns_ at 4.0 "$cbr_($i) stop"

	$ns_ at $start_tx_time "$MPEG2_($i) start" 
	$ns_ at $start_tx_time "$rtcp_($n) start"

	incr start_tx_time
	incr selfs

	set udp_(1) [new Agent/UDP]
	$ns_ attach-agent $node_(1) $udp_(1)
	set null_(21) [new Agent/LossMonitor]
	$ns_ attach-agent $node_(21) $null_(21)
	set cbr_(1) [new Application/Traffic/CBR]
	$cbr_(1) set packetSize_ $opt(CBRpsize)
	$cbr_(1) set interval_  $opt(CBRperiod)
	$cbr_(1) set random_ 1
	$cbr_(1) set CBRrate $opt(CBRrate)
	$cbr_(1) attach-agent $udp_(1)
	$ns_ connect $udp_(1) $null_(21)
	$udp_(1) set fid_ 4
	#$ns at 0.0 "$cbr_(1) start"
	#$ns at 4.0 "$cbr_(1) stop"

$ns_ at $opt(stop)    {finish} 
for {set i 0} {$i < $opt(NumOfMN)} {incr i} {

    $ns_ initial_node_pos $node_($i) 15

proc finish {} {
    global ns node_ null_ nn2 opt trace namtrace namtrace_s sinkmpeg
    puts "Finishing ns at time [$ns_ now]."
    $ns_ flush-trace
    close $trace
    exit 0

puts "Starting Simulation..."
puts "NĂºmero de nodos:$num_nodes"
$ns_ run

next up previous
Next: Trace file generator Up: Installation of video-streaming implementations Previous: RTP/RTCP installation
vico 2009-03-10