The ns Manual (formerly ns Notes and Documentation)1 - NM Lab at ...

More documents

Recommendations

Info

The older cmu model used an incoming_ flag added in all pkts to figure out direction of pkt flow in the lower layers like ll,mac etc. Later this was replaced by a variable called direction_ added in cmn_hdr. direction value can be set to UP, DOWNor NONE. all pkts created with a DOWN dir by default.why: Both these flags were being used which is not really reqd. so incoming_ flag has been replaced with direction_.16.4 Commands at a glanceFollowing is a list of commands used in wireless simulations:$ns_ node-config -addressingType -adhocRouting -llType-macType -propType -ifqType -ifqLen -phyType -antType -channelType -topoInstance -wiredRouting -mobileIP -energyModel -initialEnergy -rxPower -txPower -agentTrace -routerTrace -macTrace -movementTrace This command is used typically to configure for a mobilenode. For more info about this command (part of new node APIs)see chapter titled "Restructuring ns node and new Node APIs" in ns Notes and Documentation.$ns_ node This command is used to create a mobilenode after node configuration is done as shown in the node-config command. Incasehierarchical addressing is being used, the hier address of the node needs to be passed as well.$node log-movementThis command previously used to enable logging of mobilenode’s movement has now been replaced by $ns_node-config -movementTrace .create-god 167
This command is used to create a God instance. The number of mobilenodes is passed as argument which is used by God tocreate a matrix to store connectivity information of the topology.$topo load_flatgrid This initializes the grid for the topography object. and are the x-y co-ordinates for the topology and are used forsizing the grid. The grid resolution may be passed as . A default value of 1 is normally used.$topo load_demfile For loading DEMFile objects into topography. See ns/dem.cc,.h for details on DEMFiles.$ns_ namtrace-all-wireless This command is used to initialize a namtrace file for logging node movements to be viewed in nam. The namtrace filedescriptor, the X and Y co-ordinates of the wireless topology is passed as parameters with this command.$ns_ nam-end-wireless This command is used to tell nam the simulation stop time given by .$ns_ initial_node_pos This command defines the node initial position in nam. denotes the size of node in nam. This function must be calledafter mobility model has been defined.$mobilenode random-motion Random-motion is used to turn on random movements for the mobilenode, in which case random destinations are assignedto the node. 0 disables and 1 enables random-motion.$mobilenode setdest This command is used to setup a destination for the mobilenode. The mobile node starts moving towards destination givenby and at a speed of m/s.$mobilenode resetThis command is used to reset all the objects in the nodes (network components like LL, MAC, phy etc).Internal proceduresFollowing is a list of internal procedures used in wireless networking:$mobilenode base-station This is used for wired-cum-wireless scenarios. Here the mobilenode is provided with the base-stationnode info for itsdomain. The address is hierarchical since wired-cum-wireless scenarios typically use hierarchical addressing.$mobilenode log-target The , which is normally a trace object, is used to log mobilenode movements and their energy usage, ifenergy model is provided.$mobilenode topography This command is used to provide the node with a handle to the topography object.$mobilenode addifA mobilenode may have more than one network interface. This command is used to pass handle for a network interface tothe node.$mobilenode namattach This command is used to attach the namtrace file descriptor to the mobilenode. All nam traces for the nodeare then written into this namtrace file.168
Page 6 and 7:
18 Radio Propagation Models 17718.1
Page 8 and 9:
30 Multicast Routing 25130.1 Multic
Page 10 and 11:
38.2.5 An example . . . . . . . . .
Page 12 and 13:
X Other 40347 Educational use of NS
Page 14:
# so, we lied. now, we define the t
Page 17 and 18:
Chapter 2Undocumented FacilitiesNs
Page 19 and 20:
Part IInterface to the Interpreter1
Page 21 and 22:
• if you can do what you want by
Page 23 and 24:
• tcl.result(const char* s)Pass t
Page 25 and 26:
By convention in ns, the class Agen
Page 27 and 28:
$object set bwvar 1500kb$object set
Page 29 and 30:
For a C++ variable to be traceable,
Page 31 and 32:
3.5 Class TclClassThis compiled cla
Page 33 and 34:
class Packet {......static int hdrl
Page 35 and 36:
The actual arguments passed by the
Page 37 and 38:
class TclClass (Section 3.5) define
Page 39 and 40:
Chapter 4The Class SimulatorThe ove
Page 41 and 42:
4.2.2 the heap schedulerThe heap sc
Page 43 and 44:
4.4 Commands at a glanceSynopsis:ns
Page 45 and 46:
$ns_ dumpqCommand for dumping event
Page 47 and 48:
NODEPortClassifierAgentAgentAddrCla
Page 49 and 50:
The Node instance variable, entry_,
Page 51 and 52:
The default values for all the abov
Page 53 and 54:
The classify() method is pure virtu
Page 55 and 56:
};The class imposes no direct seman
Page 57 and 58:
flow-specific queuing disciplines a
Page 59 and 60:
5.5 Routing Module and Classifier O
Page 61 and 62:
Module NameRtModule/BaseRtModule/Mc
Page 63 and 64:
$node neighborsThis returns the lis
Page 65 and 66:
Linkhead_enqT_queue_ deqT_ link_ tt
Page 67 and 68:
6.2 ConnectorsConnectors, unlink cl
Page 69 and 70:
$ns_ link-lossmodel This function
Page 71 and 72:
Chapter 7Queue Management and Packe
Page 73 and 74:
}}}void Queue::resume(){Packet* p =
Page 75 and 76:
7.3 Different types of Queue object
Page 77 and 78:
maxidle_ is the maximum amount of t
Page 79 and 80:
dst_ The destination address of pac
Page 81 and 82:
7.5.2 ConfigurationRunning a JoBS s
Page 83 and 84:
mean_pkt_size_ Used to set the expe
Page 85 and 86:
Demarker objects$q trace-file This
Page 87 and 88:
The recv() method overrides the bas
Page 89 and 90:
9.2 ImplementationThe procedures an
Page 91 and 92:
Average sending rateTSW window leng
Page 93 and 94:
The following command adds an entry
Page 95 and 96:
$qCE configQ 0 1 10 20 0.10Note tha
Page 97 and 98:
Chapter 10AgentsAgents represent en
Page 99 and 100:
CtrMcast/EncapCtrMcast/DecapMessage
Page 101 and 102:
}bind("windowOption_", &wnd_option_
Page 103 and 104:
hdr_flags* nf = (hdr_flags*)npkt->a
Page 105 and 106:
public:ECHO_Timer(ECHO_Agent *a) :
Page 107 and 108:
10.6.4 Using the agent through OTcl
Page 109 and 110:
State Variables are:dupacks_ Number
Page 111 and 112:
$agent attach-tbf Attaches a token
Page 113 and 114:
(void)Scheduler::instance().schedul
Page 115 and 116:
* outstanding, cancel it.*/void Tcp
Page 117 and 118: Chapter 12Packet Headers and Format
Page 119 and 120: method is now obsolete; its usage i
Page 121 and 122: Packethdrsize_next_bits()points to
Page 123 and 124: the system’s memory allocator. In
Page 125 and 126: }incr hdrlen_ $incrreturn $baseFrom
Page 127 and 128: Chapter 13Error ModelThis chapter d
Page 129 and 130: SimpleLink::errormodule argsSimulat
Page 131 and 132: This is a simple example of how to
Page 133 and 134: Higher LayersNode 1Node 2. . .Node
Page 135 and 136: };void recv(Packet* p, Handler*);vi
Page 137 and 138: and the frame type. It then passes
Page 139 and 140: $ll_ set delay_ $delay$ll_ set band
Page 141 and 142: 14.10 Commands at a glanceThe follo
Page 143 and 144: 15.2.1 Default Hierarchical Setting
Page 145 and 146: Chapter 16Mobile Networking in nsTh
Page 147 and 148: entry_addrdemuxIP addressdefaulttar
Page 149 and 150: 16.1.2 Creating Node movementsThe m
Page 151 and 152: set netif $netif_($t)set mac $mac_(
Page 153 and 154: the hardware address of a packet’
Page 155 and 156: destined to itself to the port dmux
Page 157 and 158: switch(ch->ptype()) {case PT_MAC:br
Page 159 and 160: 16.1.7 Revised format for wireless
Page 161 and 162: Packet info at "Application level"
Page 163 and 164: The main problem facing the wired-c
Page 165 and 166: target_target_encapsulatorreg_agent
Page 167: why: This avoids header clashes bet
Page 171 and 172: Chapter 17Satellite Networking in n
Page 173 and 174: in counter-rotating planes (where t
Page 175 and 176: • Position/Sat/Geo A geostationar
Page 177 and 178: $ns add-isl $ltype $node1 $node2 $b
Page 179 and 180: $satrouteobject_ compute_routeswher
Page 181 and 182: This will add an error model to the
Page 183 and 184: lh_firstnameobj‘‘name’’ is
Page 185 and 186: from routing agentto Node->entrySat
Page 187 and 188: $satnode add-isl This method c
Page 189 and 190: set prop [new Propagation/FreeSpace
Page 191 and 192: 18.3.2 Using shadowing modelBefore
Page 193 and 194: Chapter 19Energy Model in nsEnergy
Page 195 and 196: Chapter 20Directed DiffusionThe dir
Page 197 and 198: However if we have a large and dens
Page 199 and 200: yr application in the ns context. T
Page 201 and 202: value of opt(pre-stop) is usually t
Page 203 and 204: 21.2 Implementation of XCP in NSIn
Page 205 and 206: the persistent queue length in the
Page 207 and 208: Thruput2 0.054024 60000residue_pos_
Page 209 and 210: Chapter 22DelayBox: Per-Flow Delay
Page 211 and 212: $ns attach-agent $n_sink $sink# mak
Page 213 and 214: Chapter 23Changes made to the IEEE
Page 215 and 216: Part IIISupport214
Page 217 and 218: endenddocument pargvcPrint out argc
Page 219 and 220:
24.4.2 Memory Conservation TipsSome
Page 221 and 222:
Chapter 25Mathematical SupportThe s
Page 223 and 224:
set run [lindex $argv 0]}if {$run <
Page 225 and 226:
}$sizeRNG next-substream# print the
Page 227 and 228:
protected:RNG* rng_;};Classes deriv
Page 229 and 230:
ns-random is implemented in ~ns/mis
Page 231 and 232:
Chapter 26Trace and Monitoring Supp
Page 233 and 234:
The monitor-queue function is const
Page 235 and 236:
also used to accumulate packet drop
Page 237 and 238:
}name,th->size(),flags,iph->flowid(
Page 239 and 240:
PT_TORA,PT_DSR,PT_AODV,// insert ne
Page 241 and 242:
The QueueMonitor class is not deriv
Page 243 and 244:
$ns_ trace-all This is the command
Page 245 and 246:
Chapter 27Test Suite SupportThe ns
Page 247 and 248:
... ...}$ns_ at $opt(stop).1 "$self
Page 249 and 250:
Example: To enable debugging in Que
Page 251 and 252:
Chapter 29Unicast RoutingThis secti
Page 253 and 254:
Asymmetric Routing Asymmetric routi
Page 255 and 256:
class RouteLogic This class defines
Page 257 and 258:
— The procedure init-all{} is a g
Page 259 and 260:
Global Actions Once the detailed ac
Page 261 and 262:
This dumps next hop information in
Page 263 and 264:
$ns mrtproto ST;# specify shared tr
Page 265 and 266:
Dense Mode The Dense Mode protocol
Page 267 and 268:
and unique label (id). Thus, “inc
Page 269 and 270:
add-iif{ifid link},add-oif{link if}
Page 271 and 272:
CtrMcastComp is the centralised mul
Page 273 and 274:
$ns_ mrtproto This command specifi
Page 275 and 276:
Chapter 31Network DynamicsThis chap
Page 277 and 278:
v 0.8123 link-up 3 5v 0.8123 link-u
Page 279 and 280:
The first argument is the time at w
Page 281 and 282:
$ns_ rtmodel This command defines
Page 283 and 284:
$ns set-address-format hierarchical
Page 285 and 286:
32.4 Hierarchical Routing with Sess
Page 287 and 288:
Chapter 33UDP Agents33.1 UDP Agents
Page 289 and 290:
Chapter 34TCP AgentsThis section de
Page 291 and 292:
set ns [new Simulator]set node1 [$n
Page 293 and 294:
34.2.1 The Base TCP SinkThe base TC
Page 295 and 296:
Agent/TCP/FullTcp set dupseg_fix_ t
Page 297 and 298:
34.5 Tracing TCP DynamicsThe behavi
Page 299 and 300:
Chapter 35SCTP AgentsThis chapter d
Page 301 and 302:
Figure 35.1: Example of a Multihome
Page 303 and 304:
Note: the actual value of these tra
Page 305 and 306:
1.526624 1 4 sctp 1500 -------D 0 1
Page 307 and 308:
$ns at 5.0 "finish"$ns run35.5.2 Mu
Page 309 and 310:
Chapter 36Agent/SRMThis chapter des
Page 311 and 312:
36.1.2 Other Configuration Paramete
Page 313 and 314:
3.6274 n 0 m r 1 type repair servi
Page 315 and 316:
3.6029 n 3 m r 2 Q NTIMER at 3.730
Page 317 and 318:
36.4 Loss Detection—The Class SRM
Page 319 and 320:
same packet. The repair objet does
Page 321 and 322:
}hdr_asrm* seh = (hdr_asrm*) p->acc
Page 323 and 324:
set grp [Node allocaddr]$srm set ds
Page 325 and 326:
#set up the multicast routingDM set
Page 327 and 328:
37.3 Architecture of the PLM Protoc
Page 329 and 330:
We add in void PLMLossMonitor::recv
Page 331 and 332:
Part VIApplication330
Page 333 and 334:
Traffic generatorsApplication/Traff
Page 335 and 336:
• recv(int nbytes)—Announces th
Page 337 and 338:
1. EXPOO_Traffic—generates traffi
Page 339 and 340:
set src [new Agent/UDP]set sink [ne
Page 341 and 342:
Application FTP FTP objects produce
Page 343 and 344:
send_data(ADU)Application(HttpApp,
Page 345 and 346:
39.1.4 Transmitting user data over
Page 347 and 348:
and teardown of connections. Only O
Page 349 and 350:
TclObjectPagePoolPagePool/CompMathP
Page 351 and 352:
PagePool/ProxyTrace takes these two
Page 353 and 354:
}int id_; // object IDWebTrafSessio
Page 355 and 356:
An Http/Server object waits for inc
Page 357 and 358:
set tmp [new RandomVariable/Exponen
Page 359 and 360:
Object Type Event Type Explaination
Page 361 and 362:
Chapter 40Worm ModelIn this chapter
Page 363 and 364:
$w local-p 0.5Following are some co
Page 365 and 366:
(nsnode) clientcloudPackM ime(nsnod
Page 367 and 368:
HTTP responsesclients servers Delay
Page 369 and 370:
41.5 Commands at a GlanceThe follow
Page 371 and 372:
• HTTP response size (bytes)• s
Page 373 and 374:
Chapter 42Session-level Packet Dist
Page 375 and 376:
42.1.2 Inserting a Loss ModuleWhen
Page 377 and 378:
Delay and Loss Modules Each receive
Page 379 and 380:
Chapter 43Asim: approximate analyti
Page 381 and 382:
set n(1) [$ns node]set link(0:1) [$
Page 383 and 384:
Part VIIIEmulation382
Page 385 and 386:
When using the emulation mode, a sp
Page 387 and 388:
set intf [$pf1 open readonly]puts "
Page 389 and 390:
puts "install nets into taps..."$a0
Page 391 and 392:
Chapter 45Nam45.1 IntroductionNam i
Page 393 and 394:
• Button 6 (Chevron logo) - Close
Page 395 and 396:
Second, when dealing with randomly
Page 397 and 398:
dst_portaddr,seqno,flags,sname);A n
Page 399 and 400:
• up• down• right• left•
Page 401 and 402:
46.1.7 Agent TracingAgent trace eve
Page 403 and 404:
v -t 1.0 -e node_tclscript 2 "Echo
Page 405 and 406:
If nam ever gets to the end of an e
Page 407 and 408:
l :link-t time-s source id-d des
Page 409 and 410:
E :D :P :a :session enqueue-t time
Page 411 and 412:
v :V :N :W :g :A :c :q :execute tcl
Page 413 and 414:
$ns duplex-link-op orient right$ns
Page 415 and 416:
Chapter 47Educational use of NS and
Page 417 and 418:
Bibliography[1] C. Alaettinoğlu, A
show all

The ns Manual (formerly ns Notes and Documentation)1 - NM Lab at ...

Create successful ePaper yourself

Delete template?

Save as template?