NS2 in Ad Hoc Network

1. NS2 in Ad Hoc Network 492516207 邱朝螢

2. Ad Hoc Wireless Simulations in NS2 • Topography • Routing Protocols • AODV • DSR • DSDV • TORA • Configure Node • Traffic • Mobile Node

3. Configure Node • $ns_ node-config • -adhocRouting AODV\ ;# routing protocol • -llType LL\ ;# link layer type • -macType Mac/802_11\ ;# MAC type • -ifqType Queue/DropTail/PriQueue\ ;# interface queue type • -ifqLen 100 \ ;# max packet in ifq • -antType Antenna/OmniAntenna\ ;# antenna model • -propType Propagation/TwoRayGround\ ;# radio-propagation model

4. Configure Node • -phyType Phy/WirelessPhy\;# network interface type • -topoInstance $topo \ • -agentTrace ON \ • -routerTrace ON \ • -macTrace OFF \ • -movementTrace OFF \ • -channel $chan_1_

5. Topography • # set up topography object set topo [new Topography] $topo load_flatgrid $val(x) $val(y) • # Create God create-god $val(nn)

6. Node • Create Node • for {set i 0} {$i < $val(nn)} {incr i} { set node_($i) [$ns_ node]} • Random initial node position • for {set i 0} {$i < $val(nn)} {incr i}{ $node_($i) set X_ [expr { $val(x)*rand() } ] $node_($i) set Y_ [expr { $val(y)*rand() } ] $node_($i) set Z_ 0.0 $node_($i) radius 500}

7. Node • Initial node size • for {set i 0} {$i < $val(nn)} {incr i} { $ns_ initial_node_pos $node_($i) 50;} • Link • $ns duplex-link $n0 $n2 2Mb 10ms DropTail • $node_($i) radius 500

10. Simulation of AODV

11. Traffic • CBR • set cbr [new Application/Traffic/CBR] $cbr attach-agent $udp $cbr set packet_size_ 512 $cbr set packet_rate_ 4 $cbr set rate_ 2mb $ns_ at 0.01 "$cbr start" $ns_ at $val(stop) "$cbr stop"

13. Mobile Node • for {set j 0} {$j < $val(mvnodes)} {incr j} { set addx [expr {$val(x)*rand()}] set addy [expr {$val(y)*rand()}] set ranspeed [expr {$val(nodespeed)*rand()}] set temp 0.1 $ns_ at $temp "$node_($j) setdest $addx $addy $ranspeed" }