Outlines
 Wireless TCL script
 How to build wireless scenarios
 Mobility and traffic (setdest & cbrgen.tcl)
 DSR trace...
Wireless TCL Script (1/3)
 Mobile node parameters
 Channel type (Channel/WirelessChannel)
 Propagation model (Propagati...
Wireless TCL Script (2/3)
# unity gain, omni-directional antennas
# set up the antennas to be centered in the node
and 1.5...
Wireless TCL Script(3/3)
 How to reduce the trace output file size
set AgentTrace ON
set RouterTrace ON
set MacTrace ON
...
Wireless Scenario (Mobility)
 Provide initial (X,Y, for now Z=0) co-ordinates for mobile
nodes
$node_(0) set X_ 5.0
$node...
Wireless scenario ( Traffic)
# Setup traffic flow between nodes
# TCP connections between node_(0) and node_(1)
set tcp [n...
Setdet
 A script has been provided which generates these
movements automatically in a separate file
 To generate this, u...
Cbrgen.tcl
 Generates traffic automatically in a separate file
 script present in ns/indep-utils/cmu-scen-gen/
directory...
A Typical DSR trace format
(1/3)
 s 606.210364161 _39_ RTR --- 1306 DSR 44 [13a a 27 800] ------- [39:255 8:255 255 8] 2 ...
DSR Trace Format (2/3)
 [39:255 8:255 255 8] IP detail: src address: IP 39 means 0.0.0.39
port 255
dst address: IP 8 mean...
DSR Trace Format (3/3)
 2 [0 0] [0 0 0 0->0] [1 1 8 39->10] DSR detail:
 2: num_addrs()
 [0 0] route-request option, th...
Calculating Routing Overhead &
PDR
 Routing overhead =
 sum of routing packets / sum of data packets
 PDR = Packet Deli...
Routing Overhead (AWK code)
 BEGIN {dsrpktno = 0; dsrbyte = 0; cbrpktno =
0; cbrbyte = 0; }
{
$1~/s/ && /DSR/ && /MAC/ { ...
PDR (AWK code)
 BEGIN {Scbr=0; Rcbr=0; }
{
$1~/s/ && /cbr/ && /AGT/ { Scbr ++ ;}
$1~/r/ && /cbr/ && /AGT/ { Rcbr++ ;}
}
E...
References
 http://www.winlab.rutgers.edu/%7Ezhibinwu/html/dsr_trace_anlysis.html
 http://www.winlab.rutgers.edu/~zhibin...
Ns2 introduction 2
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Ns2 introduction 2

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Ns2 introduction 2

  1. 1. Outlines  Wireless TCL script  How to build wireless scenarios  Mobility and traffic (setdest & cbrgen.tcl)  DSR trace file  Using AWK for calculating  Routing overhead  PDR( Packet Delivery Ratio)
  2. 2. Wireless TCL Script (1/3)  Mobile node parameters  Channel type (Channel/WirelessChannel)  Propagation model (Propagation/TwoRayGround)  Interface type (Phy/WirelessPhy)  MAC layer protocol (Mac/802_11)  Routing protocol (DSR)  Interface Queue type (CMUPriQueue - for DSR)  Interface Queue Length (50)  Antenna type (Antenna/OmniAntenna)  LL type (LL)  Read chapter 16 in ns-documentation  Use wireless.tcl example in tclex folder
  3. 3. Wireless TCL Script (2/3) # 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
  4. 4. Wireless TCL Script(3/3)  How to reduce the trace output file size set AgentTrace ON set RouterTrace ON set MacTrace ON  Generating data traffic and mobility scenarios set val(cp) "../mobility/scene/cbr-3-test" set val(sc) "../mobility/scene/scen-3-test"
  5. 5. Wireless Scenario (Mobility)  Provide initial (X,Y, for now Z=0) co-ordinates for mobile nodes $node_(0) set X_ 5.0 $node_(0) set Y_ 2.0 $node_(0) set Z_ 0.0 $node_(1) set X_ 390.0 $node_(1) set Y_ 385.0 $node_(1) set Z_ 0.0  Now produce some simple node movements # Node_(1) starts to move towards node_(0) $ns_ at 50.0 "$node_(1) setdest 25.0 20.0 0.0" $ns_ at 10.0 "$node_(0) setdest 20.0 18.0 0.0" # Node_(1) then starts to move away from node_(0) $ns_ at 100.0 "$node_(1) setdest 490.0 480.0 0.0"
  6. 6. Wireless scenario ( Traffic) # Setup traffic flow between nodes # TCP connections between node_(0) and node_(1) set tcp [new Agent/TCP] $tcp set class_ 2 set sink [new Agent/TCPSink] $ns_ attach-agent $node_(0) $tcp $ns_ attach-agent $node_(1) $sink $ns_ connect $tcp $sink set ftp [new Application/FTP] $ftp attach-agent $tcp $ns_ at 10.0 "$ftp start"
  7. 7. Setdet  A script has been provided which generates these movements automatically in a separate file  To generate this, use the setdest script present in ns/indep-utils/cmu-scen-gen/ directory.  Examples:  setdest -v 1 -n 20 -p 2.0 -M 10.0 -t 200 -x 500 -y 500 > scen-20_v1.tcl  setdest -v 2 -n 20 -s 1 -m 1 -M 10.0 -t 200 -P 1 -p 2.0 -x 500 -y 500 > scen-20_v2.tcl
  8. 8. Cbrgen.tcl  Generates traffic automatically in a separate file  script present in ns/indep-utils/cmu-scen-gen/ directory ns cbrgen.tcl [-type cbr|tcp] [-nn nodes] [-seed seed] [-mc connections][-rate rate] >output.tcl  Example:  ns cbrgen.tcl –type cbr –nn 50 –seed 1 –mc 10 – rate 4 > cbr-50-10-4
  9. 9. A Typical DSR trace format (1/3)  s 606.210364161 _39_ RTR --- 1306 DSR 44 [13a a 27 800] ------- [39:255 8:255 255 8] 2 [0 0] [0 0 0 0->0] [1 1 8 39->10]  s: means send 606.210364161: time stamp _39_: node id RTR: means router message 1306: uid of this packet DSR: DSR agent 44: size in the common header hdr_cmn()  [13a a 27 800] MAC detail: 13a: means the expected transmission time ( note that packet size is large, 44 bytes, 314second?) a: means the receiving node: 10 27: means the sending node is 39 800: IP header: 0x0800, (ETHERTYPE_ARP is 0x0806)
  10. 10. DSR Trace Format (2/3)  [39:255 8:255 255 8] IP detail: src address: IP 39 means 0.0.0.39 port 255 dst address: IP 8 means 0.0.0.8 port 255 TTL: 255 Next-hop: 8  TTL (time to live ) you can use it to know the number of hops
  11. 11. DSR Trace Format (3/3)  2 [0 0] [0 0 0 0->0] [1 1 8 39->10] DSR detail:  2: num_addrs()  [0 0] route-request option, this is not a route request, the second 0 is labeled for sequence number  [0 0 0 0->0] route-reply option: [ " route-reply?" "Rreq seqno" "reply length" "dst of src route", "src of the src route"]  [1 1 8 39->10], 1: shows this is a route error 1: number of route errors 8: tp notify node 8. 39->10: link 39-10 is broken
  12. 12. Calculating Routing Overhead & PDR  Routing overhead =  sum of routing packets / sum of data packets  PDR = Packet Delivery Ratio  PDR =  sum of packets sent/ sum of successfully received packets  How to extract the number of  Routing packets  $cat out.tr |grep "^s.*MAC.*DSR" | wc –l  Data packets  $cat out.tr |grep "^s.*MAC.*cbr" | wc –l
  13. 13. Routing Overhead (AWK code)  BEGIN {dsrpktno = 0; dsrbyte = 0; cbrpktno = 0; cbrbyte = 0; } { $1~/s/ && /DSR/ && /MAC/ { dsrpktno ++ ; dsrbyte+=$8 ;} $1~/s/ && /cbr/ && /MAC/ { cbrpktno ++ ; cbrbyte+=$8; } } END { print ( dsrpktno/cbrpktno, dsrbyte /cbrbyte) }
  14. 14. PDR (AWK code)  BEGIN {Scbr=0; Rcbr=0; } { $1~/s/ && /cbr/ && /AGT/ { Scbr ++ ;} $1~/r/ && /cbr/ && /AGT/ { Rcbr++ ;} } END { print ( “PDR=“,Scbr/Rcbr) }
  15. 15. References  http://www.winlab.rutgers.edu/%7Ezhibinwu/html/dsr_trace_anlysis.html  http://www.winlab.rutgers.edu/~zhibinwu/html/network_simulator_2.html  http://www.isi.edu/nsnam/ns/ns-documentation.html

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