hi,
I am new to NS 2. I am facing this small problem...please can anyone help in
this regard....
I simulating wireless scenario. I have one mobile node and one
static(non-mobile) node.
I set a specified route for mobile node. while it travels, it may enter and
exit the communication range of static node. I established the tcp connection
between them as follows,
set tcp1 [new Agent/TCP]
$tcp1 set interval_ 0.0003
$tcp1 set class_ 2
$ns attach-agent $node_(0) $tcp1
set sink1 [new Agent/TCPSink]
$ns attach-agent $node_(1) $sink1
$ns connect $tcp1 $sink1
set ftp1 [new Application/FTP]
$ftp1 attach-agent $tcp1
$ns at 1.3 "$ftp1 start"
$ns at 7.0 "$ftp1 stop" ; ## This is optional
$ns at 32.11 "$ftp1 start"
In the above node_(0) is mobile node......node_(1) is static node.....
At 1.3 "$ftp1 start" is working....the mobile node enters the communication
range of static node........I can able to view the packet flow(animation)
between the nodes.
At 7.0 "$ftp1 stop"...I mentioned "this line is optional", since at this point
the mobile node exit the communication range of static node. Even I delete
this line...I can able to see the packet drop at this point.....and the
communication(packet-flow) is stopped.
After some time, Again, I am making the mobile node to revisit the static
node...that is....Again I am making the mobile node to enter into the
communication range of static node...so I mentioned "$ns at 32.11 "$ftp1
start"".......but this time there is no communication is taking place....and I
cannot able to view the packet-flow as animation.....moreover....the mobile
node simply crosses the static node......
I want to know whether my code is correct or not....Am I correct?.....Once the
ftp is stopped...is it possible to start again????.....
Can any say....during runtime "how to close the tcp connection and start new
one (or) Is it possible to establish more than one tcp connection in a single
node???
I have one mobile node....I want this node to communicate to two other nodes at
the same time.....is it possible???
Assume that...
node0 (mobile node)
node1 (static node)
node2 (static node)
I want node0 to establish tcp connection to node1 and node2 at the same
time...?....more importantly.....if node0 established tcp connection with node1
at time t1 and stopped at time t2....and I want to establish connection again
at time t3 with the same tcp connection...
I am sorry...I cant to able to type msg as much as short....
please help in this regard....
regards
Sarwan
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