[ns] is there in NS Poisson Process function for generating random number??
hi all is there in NS Poisson Process function for generating random number?? I'm waiting for reply Thanks in advance -- Amin Irandoost
[ns] Problems with Simulating MPEG4 Streaming using smallko's work
Hello Sir,
I am currently doing a project on Multimedia Streaming and want to simulate
it using NS2. I searched the Mailing Archives and I found some previous work
done in this area by 'smallko'.
I got his files 'mpeg4_traffic.cc' and all. But I am facing some problems
using it. I followed the following steps:
1.) Downloaded the files. Saved the file 'mpeg4_traffic.cc' and the folder
'Video_Model' in a new folder named 'MPEG4' in the ns-2.31 directory.
2.) Added the following in the MakeFile
'MPEG4/mpeg4_traffic.o \'
under 'OBJ_CC'
3.) Performed 'make depend', 'make' and 'make install' in the ns-2.31directory.
4.) Then, I used the file 'part-of-example.txt ' to write a TcL code and
saved it in ns-2.31/tcl/lib
5.) Tried to run this file, but gives me the following error:
invalid command name Application/Traffic/MPEG4
while executing
Application/Traffic/MPEG4 create _o84
invoked from within
catch $className create $o $args msg
invoked from within
if [catch $className create $o $args msg] {
if [string match __FAILED_SHADOW_OBJECT_ $msg] {
delete $o
return
}
global errorInfo
error class $...
(procedure new line 3)
invoked from within
new Application/Traffic/MPEG4
invoked from within
set vdo [new Application/Traffic/MPEG4]
(file part-of-example.tcl line 79)
I have attached the TcL code which I was trying to run. You can see traces
of Mark Claypool's Simple Simulation Example in the code. :)
Hoping for a swift reply. Thank You.
P.S.: I am using NS-2.31. Output of uname -a
Linux merup-desktop 2.6.15-26-386 #1 PREEMPT Thu Aug 3 02:52:00 UTC 2006
i686 GNU/Linux
[ns] where to define the trace file format?
Hi friends, I have one doubt regarding trace file format. we have 3 different type of trace file formats. 1) Wired 2)simple wireless (old) 3)new wireless format In our scripting language(.tcl files) where we have to define about the trace file format ? please help me.. Thanks in advance TarakaGoud __ Yahoo! India Answers: Share what you know. Learn something new http://in.answers.yahoo.com/
[ns] Even deletion of Mac folder doesn't effect ?
Hi friends, I am working on 802.11 WLAN.In the scripting languages we are using Mac/802_11 Mac/Simple Mac/Csma-ca I am thinking like this By defining this Mac in .tcl code its getting .cc files back ground from the mac folder. But i removed mac folder from the ns-2.28 directory and i used Mac/802_11 in the .tcl code. Even i was able to get the output without any mac folder presence And i tried by commenting the line mac_802_11.o line in the Makefile again same thing the code was running ... please tell whats the reason behind that ... Thanks in Advance, TarakaGoud __ Yahoo! India Answers: Share what you know. Learn something new http://in.answers.yahoo.com/
Re: [ns] Mapping of the entire Source Tree
Murali P wrote: Is there any documentation available for browsing the entire source code. I know NS Notes is a good place to start off with, but an additional material that gives a brief overview of the location of various stuff in a central location is going to be extremely helpful for researchers in my opinion. There's an incomplete class hierarchy at NS by example http://nile.wpi.edu/NS/ in the `Network Components' section (direct link: http://nile.wpi.edu/NS/components.html ) In addition, if you go over the manual and/or do some coding yourself you'll quickly find out that all the C++ stuff is in the ns directory (and in sub-directories thereof) while the tcl-related code resides in ns/tcl/. It should easily be possible to figure out what's within a directory by its name. There seem to be some exceptions, however: for instance, the UDP implementation -- a classical agent -- is located within ns/*apps*. Another thing that might be necessary to determine is whether implementations are part of OTcl or C++ or both. For instance, the web-cache client and server are available in OTcl only while its transport wrapper is part of C++. HTH, --Timo
[ns] R: analyse trace files
Hi Stephan, have a look at tracegraph or trace2stats. bye, Marco Messaggio originale Da: [EMAIL PROTECTED] Data: 6-apr- 2007 7.37 AM A: ns-users@ISI.EDU Ogg: [ns] analyse trace files Hello again! Think my last Mail was lost :-( I'm using ns-2.29 and do some wireless simulations. Now i'm looking for some scripts to analyse the .tr Files. Need some scripts that give me throughput, Number of lost/received packets and so on. Thanks in advance Stephan
[ns] R: why RTP header in UDP's sendmsg() ?
Hi Timo, my guess is that those infos can be useful for statistics collection. Is the RTP header considered in the UDP header size? If not, it is an invisible header, put there just for informational purposes and not affecting the simulation outcome. bye, Marco Messaggio originale Da: [EMAIL PROTECTED] Data: 4-apr- 2007 4.37 PM A: ns-users@ISI.EDU Ogg: [ns] why RTP header in UDP#39;s sendmsg() ? Hiya, I'm not sure if this issue rather belongs to the dev-mailinglist instead of the users' one but since it's just a question and not some sort of contribution I'll try here first: I've looked at the UDP code (in apps/udp.cc) and came to realize that everytime the sendmsg() function is called a RTP header is put on top of the packet, including (talk burst) flags, sequence number, and a time stamp. Just wondering: What's the rationale behind this? Cheers, --Timo
[ns] analyse trace file- packet delay
Hello, I am new to NS2. I want to find packet delay from node 2 to node 3. Topology is like 2-0--1---3 0-1 is a bottleneck link I got the output trace file of format (sample) r 4.030256 10 1 ack 40 --- 5 10.0 5.0 74 579 + 4.030256 1 0 ack 40 --- 5 10.0 5.0 74 579 - 4.030256 1 0 ack 40 --- 5 10.0 5.0 74 579 r 4.031008 4 0 tcp 1040 --- 4 4.0 9.0 69 578 + 4.031008 0 1 tcp 1040 --- 4 4.0 9.0 69 578 - 4.031008 0 1 tcp 1040 --- 4 4.0 9.0 69 578 r 4.031824 0 4 ack 40 --- 4 9.0 4.0 66 560 + 4.031824 4 0 tcp 1040 --- 4 4.0 9.0 77 593 - 4.031824 4 0 tcp 1040 --- 4 4.0 9.0 77 593 r 4.031872 1 11 tcp 1040 --- 6 6.0 11.0 41 552 now I have to find minimum/maximum/average Packet delay from node 2 to node3? Please tell me the idea. Thanks Rinky
[ns] how can I graphically show ad hoc mobile nodes using nam?
Hi All, I am new in NS world. I am running same tlc sample scripts and showing nodes and links using nam. Can anybody tell me, after having defined a topology of a mobile ad hoc network and having defined the node movement, how can I graphically show the network topology. Is it possible to see the node movement and the trasmission range? Thanks in advance for any reply, Seba -- Leggi GRATIS le tue mail con il telefonino i-mode di Wind http://i-mode.wind.it/
Re: [ns] why RTP header in UDP's sendmsg() ?
Hi Marco, Marco Fiore wrote: my guess is that those infos can be useful for statistics collection. Is the RTP header considered in the UDP header size? If not, it is an invisible header, put there just for informational purposes and not affecting the simulation outcome. You seem to be right, at least that's what I can say from taking a closer look at UdpAgent::sendmsg(int, AppData*, const char*). The size is noted down in the common header (hdr_cmn) as given to sendmsg() in the first paremter (nbytes), the RTP header's size is not being put into consideration. Thanks for the explanation, --Timo Messaggio originale Da: [EMAIL PROTECTED] Data: 4-apr- 2007 4.37 PM A: ns-users@ISI.EDU Ogg: [ns] why RTP header in UDP#39;s sendmsg() ? Hiya, I'm not sure if this issue rather belongs to the dev-mailinglist instead of the users' one but since it's just a question and not some sort of contribution I'll try here first: I've looked at the UDP code (in apps/udp.cc) and came to realize that everytime the sendmsg() function is called a RTP header is put on top of the packet, including (talk burst) flags, sequence number, and a time stamp. Just wondering: What's the rationale behind this? Cheers, --Timo
[ns] R: how can I graphically show ad hoc mobile nodes using nam?
Ciao, other than nam, you can try with Huginn: http://www.informatik. uni-mannheim.de/pi4.data/content/projects/huginn/ or iNSpect: http: //toilers.mines.edu/Public/NsInspect bye, Marco Messaggio originale Da: [EMAIL PROTECTED] Data: 6-apr-2007 7.12 PM A: ns- usersns-users@ISI.EDU Ogg: [ns] how can I graphically show ad hoc mobile nodes using nam? Hi All, I am new in NS world. I am running same tlc sample scripts and showing nodes and links using nam. Can anybody tell me, after having defined a topology of a mobile ad hoc network and having defined the node movement, how can I graphically show the network topology. Is it possible to see the node movement and the trasmission range? Thanks in advance for any reply, Seba -- Leggi GRATIS le tue mail con il telefonino i-mode di Wind http://i-mode.wind.it/
[ns] R: analyse trace file- packet delay
Hi, you can use Perl/awk to parse the tracefile, or have a look at tracegraph or trace2stats (google for them). Also, you find a ton of mails on the topic in the mailing list archives... bye, Marco Messaggio originale Da: [EMAIL PROTECTED] Data: 6-apr-2007 6.18 PM A: ns-users@ISI.EDU Ogg: [ns] analyse trace file- packet delay Hello, I am new to NS2. I want to find packet delay from node 2 to node 3. Topology is like 2- 0--1---3 0-1 is a bottleneck link I got the output trace file of format (sample) r 4.030256 10 1 ack 40 --- 5 10.0 5.0 74 579 + 4.030256 1 0 ack 40 --- 5 10.0 5.0 74 579 - 4.030256 1 0 ack 40 --- 5 10.0 5.0 74 579 r 4.031008 4 0 tcp 1040 --- 4 4.0 9.0 69 578 + 4.031008 0 1 tcp 1040 --- 4 4.0 9.0 69 578 - 4.031008 0 1 tcp 1040 --- 4 4.0 9.0 69 578 r 4.031824 0 4 ack 40 --- 4 9.0 4.0 66 560 + 4.031824 4 0 tcp 1040 --- 4 4.0 9.0 77 593 - 4.031824 4 0 tcp 1040 --- 4 4.0 9.0 77 593 r 4.031872 1 11 tcp 1040 --- 6 6.0 11.0 41 552 now I have to find minimum/maximum/average Packet delay from node 2 to node3? Please tell me the idea. Thanks Rinky
[ns] help needed to solve segmentation fault problem
Hi all, I am getting segmentation fault when I call send(p,0) to broadcast a packet from my c++ code in ns. Can anyone please help me to find out why this happe?
Re: [ns] help needed to solve segmentation fault problem
abu shahriar wrote: I am getting segmentation fault when I call send(p,0) to broadcast a packet from my c++ code in ns. Can anyone please help me to find out why this happe? Install gdb or ddd, make sure you compiled ns with debugging symbols, start your debugger and let the program crash. Check the backtrace to see at which point it stopped working, set a breakpoint and start investigating while you're stepping through the code from that point on. If you've never worked with gdb/ddd before, it might look a little bit difficult at first but it's an absolute necessity for any serious programmer to master it. There are some excellent tutorials out there. As a starter, I'd recommend these http://heather.cs.ucdavis.edu/~matloff/UnixAndC/CLanguage/Debug.html http://www.unknownroad.com/rtfm/gdbtut/gdbtoc.html for gdb and this one http://heather.cs.ucdavis.edu/~matloff/Debug/Debug.pdf [PDF slideshow] for ddd. Good luck! --Timo
[ns] how to dynamically attach (UDP) agents to nodes from C++?
Hello, I'm currently in need of extending ns-2 with an application that requires a lot of UDP connections netween nodes. Instead of statically defining these, I thought about setting them up and tearing down dynamically within the C++ code of the application I've started to implement. The alternative would be to use a fully-meshed UDP topology created in OTcl but this would pretty much clutter the configuration and use up a lot of ressources I'd only need at certain times. I've been trying to figure out how [ns-object] attach-agent [some node] [some UDP agent] works internally and have tracked it down to ns/tcl/lib/ns-node.tcl but I don't quite understand how it relates to the compiled hierarchy (although I've been reading the relevant parts of the ns-2 manual several times) and whether it's possible to do the same from within the C++ code at all. I wouldn't mind if I lost accessibility from OTcl by doing this from C++ as the connections will only be important to the compiled hierarchy. Glad for any hint regarding how to do the `attach-agent' line in C++. Cheers, --Timo
Re: [ns] how to dynamically attach (UDP) agents to nodes from C++?
Timo Reimann wrote: I'm currently in need of extending ns-2 with an application that requires a lot of UDP connections netween nodes. Instead of statically defining these, I thought about setting them up and tearing down dynamically within the C++ code of the application I've started to implement. The alternative would be to use a fully-meshed UDP topology created in OTcl but this would pretty much clutter the configuration and use up a lot of ressources I'd only need at certain times. Actually, I've been thinking about this some more and realized that it would suffice if I could just do the connect part as in [simulator object] connect [UDP object #1] [UDP object #2] dynamically within C++. Problem that arises with this issue, however, is: how'd I get the object numbers in the compiled hierarchy? I suppose I need to work with node IDs or similar but I haven't manage to figure out the details. Basically, all I need is an address such that I can send my custom AppData objects to another application. There's nsaddr_t but I don't know how to derive that from the node name. (which is all I've got from OTcl and is the same as this-name_, e.g. _o12.) --Timo
Re: [ns] how to dynamically attach (UDP) agents to nodes from C++?
Hi Matthias, Matthias Kuhnert wrote: You can call and evaluate tcl code within the c++ part via tcl.evalf()... This combined with some function for the node-id and you should have, what you need. There have been quite a few questions posted before around this topic so you should be lucky on searching the mailinglist. I've been thinking about that as well but found it to be a clumsy solution, especially when talking large-scale. In addition, I'd need to manage those _oXYZ strings (if that's what you mean by node-id) instead of easier numbers. By the way, just some minutes ago I've figured that agent.cc is already prepared for dynamic connections but needs some member functions to be implemented first. (like Agent::connect.) This seems to be the canonical way although I couldn't find anything about it in the mailing archives. Doubting though the use behind it - if you have to send udp traffic you could save yourself some time by defining a new application/agent rather than trying to send messages via the node itself... Not sure if I get you right here. What do you mean by send messages via the node? Could you elaborate on this? Maybe I should give some more information on my implementation (which is a DNS model): I'm basically trying something similar to web-cache or the RTP example from NS by example but doing most of the stuff in C++. I only want to use OTcl for defining resolvers, name-servers, and what kind of DNS mappings the nodes should request for or provide, respectively. Actually, I started off by coding my own UDP implementation but quickly stopped doing that when I understood how web-cache's HttpData worked. So I made my own DNS packet by inherenting from AppData and passed that to the generic UDP implementation. Sending this data structure and and check it's been received by doing a simple printf works fine so far. Since I've already spent quite a lot of time getting in touch with ns-2 and refining my design continuously, I'd be glad to hear anything you might have to share. Cheers, --Timo
[ns] TORA Problem
Hi guys, I'm using ns2.31 on a ubuntu system for evaluate ad hoc routing performance. I've got a problem with the allinone package, the tora test fails. I use the ./configure --enable-debug option, and I don't have any faults when I make the package. I saw many people having this problem, most of them just gave back, others don't share their solution (if they have one). Can this issue be solved once for good ? Cheers, Mathieu _ Essayez Live.com et créez l'Internet qui vous ressemble : infos, sports, météo et bien plus encore ! http://www.live.com/getstarted
