Ns2-entry 2

# Scenario Description: # In a wireless network, two nodes, node _ (0), node _ (1), TCP + FTP, and set the node movement # parameter settings for wireless nodes #

# Scenario Description: # In a wireless network, two nodes, node _ (0), node _ (1), TCP + FTP, and set the movement of the node #================================================ ========================================================== ==# parameter settings of the wireless node #========================================== ======================================

# Scenario Description:
# In a wireless network, two nodes, node _ (0), node _ (1), TCP + FTP, and node movement
#===================================================== ==========================================
# Parameter settings for wireless nodes
#===================================================== ==========================================
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) 50; # max packet in ifq
Set val (nn) 2; # number of parameter enodes
Set val (rp) Oscar; # routing protocol
Set val (x) 500; # X dimension of the topography
Set val (y) 500; # Y dimension of the topography
#===================================================== ============================================

# Create a Simulator object for event scheduling during simulation
Set ns [new Simulator]
# Set related record files
Set tracefd [open example2.tr w]
$ Ns trace-all $ tracefd
Set namtracefd [open example2.nam w]
# Note: it is different from the commands in Wired scenarios!
$ Ns namtrace-all-wireless $ namtracefd $ val (x) $ val (y)

# Set the operation at the end of the simulation, write the record to the file, close the file, and finally start NAM for animation display
Proc finish {}{
Global ns tracefd namtracefd
$ Ns flush-trace

Close $ tracefd
Close $ namtracefd

Exec nam example2.nam &
Exit 0
}

# Create a Topography object, which ensures that the moving node will move within the topology boundary.
Set topo [new Topography]
#500X500 Boundary
$ Topo load_flatgrid $ val (x) $ val (y)

# The God object is mainly used to evaluate the performance of the routing protocol,
# It stores information such as the total number of nodes and the shortest path table between nodes. This information is usually calculated before the simulation starts!
# The MAC object of a node calls the God object. (beginners do not have to worry about it !)
Create-god $ val (nn)

$ 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 )\
-ChannelType $ val (chan )\
-TopoInstance $ topo \
-AgentTrace ON \
-RouterTrace ON \
-MacTrace OFF \
-MovementTrace OFF

# Create two nodes and store them in the array Node,
For {set I 0} {$ I <$ val (nn)} {incr I }{
Set node _ ($ I) [$ ns node]
$ Node _ ($ I) random-motion 0; # disable random motion
}
# Set the physical location of the node. Generally, the third place is Z _ = 0.0. The simulation process is actually on the plane.
$ 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

# Set the node movement. setdest 20.0 18.0 1.0: Move to the (20.0, 18.0) position at a speed of 1.0 Mb/s!
$ Ns at 1.0 "$ node _ (0) setdest 20.0 18.0 1.0"
$ Ns at 5.0 "$ node _ (1) setdest 25.0 20.0 15.0"
$ Ns at 100.0 "$ node _ (1) setdest 490.0 480.0 15.0"

# Create TCP and TCP-corresponding TCPSink, connect them, and add an FTP application to the TCP Connection
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

# Set the start time of the FTP data stream
$ Ns at 1.0 "$ ftp start"
# Call the reset function of each node before the end of the simulation. In wireless scenarios, you can write the reset function as needed!
For {set I 0} {$ I <$ val (nn)} {incr I }{
$ Ns at 150.0 "$ node _ ($ I) reset ";
}
$ Ns at 150.0 "finish"

$ Ns run