[ns] NS dont check if i misspelled code?
i have some sims, one with tcl scripts: . Agent/TCP set tcp_tick_ 0.01 . the other with tcl scripts: Agent/TCP set tcp_tick_ 0.10 but the trace files out are exactly the same, i look into manal and ns code, it comes out to be spelled as "Agent/TCP set tcpTick_ 0.01 " while not "Agent/TCP set tcp_tick_ 0.01 ", but, why dont ns check if i misspelled some word in tcl scripts? like the above, if i havent do the 2 sims to see whether they are same, maybe untill now i have not discovered that. for the more, i wrote some word freely: .. Agent/TCP set VCbax_ 135 .. ns executes as normally, hahaha
[ns] some tests failed while using "./validate"
Hi I have installed ns 2.29 using cywgin on WINDOWS XP. I then added the paths using: export PATH=$PATH:/ns-allinone-2.29/bin:/ns-allinone-2.29/tcl8.4.11/unix:/ns-allinone-2.29/tk8.4.11/unix export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/ns-allinone-2.29/otcl-1.11:/ns-allinone-2.29/lib export TCL_LIBRARY=$TCL_LIBRARY:/ns-allinone-2.29/tcl8.4.11/library After that I ran the validation suite using ./validate. Most of the tests passed. However, the following tests failed: test-all-simultaneous test-all-wireless-tdma test-all-smac-multihop (this is listed as a bug for ns 2.29) I have tried installing ns on a different computer and the same thing happened. Does anyone have a solution or have the same problem? In addition, anyone know what "test-all-simultaneous" is for? Thanks in advance. Michael _ Be the first to hear what's new at MSN - sign up to our free newsletters! http://www.msn.co.uk/newsletters
[ns] Wireless simulation, TCP window size problem (fwd)
I am simulating a wireless network with nodes arranged in a line A-B---C---D.. There is a FTP connection from the first node to the last node. The distance between the nodes is 200m, as per Pt_ parameter the range is 250m. The simulation runs flawlessly but the results are bizarre. The throughput first increses with the increasing TCP window size, and then drops. The drop goes beneath the thoroughput for window size 1. This is absurd as throughout for the TCP window size of 1 should be the lower bound. I am binding the window size by maxcwnd_ parameter, is that correct? Is cwnd_ parameter in terms of number packets? Why is cwnd_ parameter a double? This how I bind the parameter: set tcp [new Agent/TCP/Newreno] $tcp set class_ 2 $tcp set packetSize_ 1024 $tcp set maxcwnd_ 5 System parameters: RedHat FC4 (kernel 2.6), ns-2.28 Please help Tarun
Re: [ns] R: Calculating Mean end-to-end delay.
Thank you Marco, i think the problem was tha t i didn't multiply with the previous number of pkts. Regards. On 7/17/06, Marco Fiore <[EMAIL PROTECTED]> wrote: > > Nicholas, > > I think the right way would be: > > mean = [mean * (total_pkts- > 1) + curr_pkt_delay] / total_pkts > > where total_pkts represents the > number of packets received, including > the current one (i.e., that > determining the curr_pkt_delay contribution). > > Regards, > > Marco > > > > Messaggio originale > >Da: [EMAIL PROTECTED] > >Data: 17- > lug-2006 3.06 AM > >A: > >Ogg: [ns] Calculating Mean end- > to-end delay. > > > > > >Hello, > > > >i have created an agent which allows me to > record the end-to-end delays of > >packets arriving at a specific node. > What i want to do is to calculate the > >mean end-to-end delay at > specific time intervals and later on output it on a > >trace file. > > > >To > calculate the mean end-to-end delay i use the following: > > > >mean= > (mean+curr_pkt_delay)/total_pkts. > > > >I do this every time a new packet > arrives. > > > >Is this the correct way of calculating mean end-to-end > delay or i am totally > >wrong here? > > > >Regards, > > > >-- > >Nicholas > Loulloudes > > > >Postgraduate at Communication Networks and Software. > > > >BSc in Computer Science. > > > > > -- Nicholas Loulloudes Postgraduate at Communication Networks and Software. BSc in Computer Science.
[ns] Implementing "via" command in C++
Hello, I want to implement a "via" command in my NS which will specify which will be the next hop a packet will take enroute to destination. I want to do this because i want to specify different hops for different packet flows. I was thinking having something like this. $ns connect $udp0 $null0 via n(2) Can someone point me to the write way from where should i start my research for doing this? Regards, -- Nicholas Loulloudes Postgraduate at Communication Networks and Software. BSc in Computer Science.
[ns] creation of a tree based routing protocol
Hi to everyone, i would like to run a wireless simulation where at the beggining of it I would construct a routing tree rooted at a specific node. In order to achieve that, I would like all the nodes to send packets to their neighbors in order to find out their neighbors. In what level should they send packets (IP, MAC)? Do I have to change something in the ns2 code or I have to write a protocol of my own? Any suggestions or guideness appreciated. Thanks Stella
[ns] Packet Simulating
Hello, Has anyone done packet simulation? Where can I find a sample code on packet simulation. Thank you __ William Ampeh
[ns] R: Calculating Mean end-to-end delay.
Nicholas, I think the right way would be: mean = [mean * (total_pkts- 1) + curr_pkt_delay] / total_pkts where total_pkts represents the number of packets received, including the current one (i.e., that determining the curr_pkt_delay contribution). Regards, Marco > Messaggio originale >Da: [EMAIL PROTECTED] >Data: 17- lug-2006 3.06 AM >A: >Ogg: [ns] Calculating Mean end- to-end delay. > > >Hello, > >i have created an agent which allows me to record the end-to-end delays of >packets arriving at a specific node. What i want to do is to calculate the >mean end-to-end delay at specific time intervals and later on output it on a >trace file. > >To calculate the mean end-to-end delay i use the following: > >mean= (mean+curr_pkt_delay)/total_pkts. > >I do this every time a new packet arrives. > >Is this the correct way of calculating mean end-to-end delay or i am totally >wrong here? > >Regards, > >-- >Nicholas Loulloudes > >Postgraduate at Communication Networks and Software. > >BSc in Computer Science. >
[ns] implementing a new mac protocol
is there a place where you have procedure to implement a mac protocol in ns2.29. first of all i would like to be clear with the usage of timers in ns. any hints are accepted with thanks. thank you once again.
[ns] Unable to run mac-test.tcl !
Hi,
As a newbie to NS I'm facing lots of strange things.
I'm trying to run mac-test.tcl script. But I get the following error:
[EMAIL PROTECTED]:~/ns-allinone-2.29 /ns-2.29/tcl/ex$ ns mac-test.tcl -node 10
no files matched glob pattern "out.*"
while executing
"glob $opt(tr).*"
invoked from within
"if [file exists $opt(tr)] {
catch "exec rm -f $opt(tr) $opt(tr)-bw [glob $opt(tr).*]"
}"
(procedure "create-trace" line 4)
invoked from within
"create-trace"
invoked from within
"set trfd [create-trace]"
(file "mac-test.tcl " line 150)
My system is kubuntu 5.12 and I've validated the whole installation of NS.
Does this have to do any thing with replacement of Mac/Csma/Cd with
Mac/802_3 ?
I don't have much of a clue of what to do.
I would appreciate any help!
[ns] Problem with 'make' for creating node movement!
Hello everybody: I'm following the ns tutorial to create node-movement for wireless scenario. I already run configure command under ns directory, but when I run 'make' command under indep-utils/cmu-scen-gen/setdest directory, I get this error: make: Nothing to be done for 'all' is it familiar with any of you? I appriciate any kind of help regarding this matter. Thanks, Sara _ FREE pop-up blocking with the new MSN Toolbar - get it now! http://toolbar.msn.click-url.com/go/onm00200415ave/direct/01/
