[ns] how to generate application-specific traffic?
hi all, i need to simulate several kinds of applications, such as skype, games, emule, video, audio etc. my question is how can i simulate these kinds of applications by the traffic trace file? should i sniffer the packet deliver time and packet size and record them in my own traffic trace file? but we know that the traffic pattern generated in this way will be affected by the transport-layer protocol, is there any better to achieve my goals? thanks in advance！
[ns] the command ns is ok ,bu nam can not running.
Hi,I have installed: windows xp sp3+ cygwin 2.573.2.3+ns-allinone 2.34 the command startxwin.dat is ok . I can see t x~windows. and nbsp;the command ns is ok ,too.I can seenbsp;the nbsp;resultnbsp;nbsp;in text. but there is no graph window for displaying the result nbsp;at the same time . I input command as below (between *nbsp;and *) (in x window) $ns ./ns-allinone-2.34/ns-2.34/tcl/ex/simple.tcl 210 0.0037499.. running nam.. $.. * nbsp;Maybe the result of ns command is right ,but nam dialog didn't appera.why? nbsp; If I double click the icon of /$NS_HOME /ns-allinone-2.34/nam-1.14/nam.exe, then display the error dialog: nam.exe couldn't find the entrance. couldn't locate the programm input node AddAtomA to dynamic link library cygwin1.dll. nbsp; Any suggestion,thanks a lot . jinling.zhao
[ns] Flooding troubles
Hi, I am trying a wireless flooding scenario. The basic idea is that one node broadcasts to all nodes in its transmission range and every receiving node immediately retransmits the packet. I modified the wireless-flooding.tcl in /ns/tcl/ex for my needs but still get some irritating results: the transmission range is 750m and even if setting the necessary parameters for transmission range (Antenna/OmniAntenna ... and Phy/WirelessPhy ...) as I do in all my other simulations, it doesn't work! Has anybody seen similar things or does someone has another flooding script for wireless nodes?? Thank you very much Alexander Adrowitzer
Re: [ns] what is the differences between these bandwidth_s and rate_s?
Also I am asked why you use this complicated tcl parameters. NS, by default, has the data rate for the MAC set at 2 Mbps. But cards are faster now. My cards are 802.11b, which means they're 11 Mbps, and so we need to change this. Add the following to the beginning of your simulation script: Mac/802_11 set dataRate_ 11Mb So when you set Phy/WirelessPhy set bandwidth_ 0Mb , that mean there is no bandwidth available, so no traffic will flow through the wireless link. Second point: Study the simple simulation for wirelress link from thw following site, don't start working with your project until understand very well: http://www.winlab.rutgers.edu/~zhibinwu/html/network_simulator_2.html http://www.isi.edu/nsnam/ns/tutorial/index.html Mohammed AbuHajar --- On Fri, 12/4/09, galaxy-huang galaxy-hu...@163.com wrote: From: galaxy-huang galaxy-hu...@163.com Subject: Re:Re: [ns] what is the differences between these bandwidth_s and rate_s? To: Mohammed AbuHajar mcs...@yahoo.com Date: Friday, December 4, 2009, 10:52 AM hi, Mohammed AbuHajar, thanks for your help. but what i really confused is that which bandwidth_ is necessary. in my scenario, i set the wireless physical layer bandwidth to ZERO(by addingPhy/WirelessPhy set bandwidth_ 0Mb), but it have no effect in my simulation. another question is, In reality, is there existing LL::bandwidth_ and Mac::bandwidth_? whether or not should we set all these bandwidths in our simulation, if not which one is necessary?thank you very much! 在2009-12-04，Mohammed AbuHajar mcs...@yahoo.com 写道： Data link Layer contains the two units(LLC,MAC) as structure So LL::bandwidth_ refer to the bandwidth of Logical Link layer Mac::bandwidth_ refer to the bandwith of Media access layer Phy::bandwidth_ refer to the bandwith of physical layer Mac802_11::basicrate_ //Rate for Data Frames Mac802_11::datarate_ //Rate for Control Frames Try to see the following site: http://www.isi.edu/nsnam/ns/tutorial/index.html http://www.winlab.rutgers.edu/~zhibinwu/html/network_simulator_2.html#Introduction Regards, Mohammed AbuHajar --- On Thu, 12/3/09, galaxy-huang galaxy-hu...@163.com wrote: From: galaxy-huang galaxy-hu...@163.com Subject: [ns] what is the differences between these bandwidth_s and rate_s? To: ns ns-users@ISI.EDU Date: Thursday, December 3, 2009, 11:03 AM hi all, i am confused by the bandwidths when i am wirting a wireless 802.11 scenario. there are many bandwidths and rates: LL::bandwidth_ Mac::bandwidth_ Phy::bandwidth_ Mac802_11::basicrate_ Mac802_11::datarate_ I don't know what are the differences between them? when to use them? Could someone give me the answer? thanks in advance!
[ns] Assign a specific node id from tcl script
Hi all, I am currently trying to assign a specific node id to each node created in my tcl script but I can't find how to do it. When a node is created, tcl assigns a node id by incrementing its value with each new node, the C++ address is mapped on this node id I think. But in my case I don't want to have nodes whose addresses are 0, 1, 2 etc. I want nodes with addresses 0, 10, 11, 12, 20, 21, 22 etc. So, if anyone knows the answer of how to assign a specific node id from tcl script, I would be very grateful if you could help me. I work with ns-2.34. Thanks in advance, Albane
Re: [ns] the command ns is ok ,bu nam can not running.
Work under linux operating system its better. Mohammed AbuHajar --- On Fri, 12/4/09, 赵金铃 zhao_jinl...@sina.com wrote: From: 赵金铃 zhao_jinl...@sina.com Subject: [ns] the command ns is ok ,bu nam can not running. To: ns-users@ISI.EDU Date: Friday, December 4, 2009, 11:03 AM -Inline Attachment Follows- Hi,I have installed: windows xp sp3+ cygwin 2.573.2.3+ns-allinone 2.34 the command startxwin.dat is ok . I can see t x~windows. and nbsp;the command ns is ok ,too.I can seenbsp;the nbsp;resultnbsp;nbsp;in text. but there is no graph window for displaying the result nbsp;at the same time . I input command as below (between *nbsp;and *) (in x window) $ns ./ns-allinone-2.34/ns-2.34/tcl/ex/simple.tcl 210 0.0037499.. running nam.. $.. * nbsp;Maybe the result of ns command is right ,but nam dialog didn't appera.why? nbsp; If I double click the icon of /$NS_HOME /ns-allinone-2.34/nam-1.14/nam.exe, then display the error dialog: nam.exe couldn't find the entrance. couldn't locate the programm input node AddAtomA to dynamic link library cygwin1.dll. nbsp; Any suggestion,thanks a lot . jinling.zhao
[ns] transmission power for 500 meter
hi all, which value i must get Pt_ to have transmission rate equal to 500 meter? i read somewhere if Pt_ = 0.2818, then the transmission range will be 250 meter. thanks in advance.
[ns] How to get the energy and speed of a node
Hi all; If any one knows how to get the energy of a node and how to get the node's mobility speed, please let me know. regards,
[ns] regarding ns2 installation error on cygwin
Hi all, When I installed the ns-2.27 in Cygwin it gave the following error and exit In file included from tclcl.h:48, from Tcl.cc:47: tclcl-mappings.h: In static member function `static int TclObjectHelperT::disp atch_(void*, Tcl_Interp*, int, char**)': tclcl-mappings.h:51: error: incomplete type `Tcl' used in nested name specifier tclcl-mappings.h:52: error: invalid use of undefined type `struct Tcl' tclcl-mappings.h:41: error: forward declaration of `struct Tcl' tclcl-mappings.h:57: error: invalid use of undefined type `struct Tcl' tclcl-mappings.h:41: error: forward declaration of `struct Tcl' make: *** [Tcl.o] Error 1 tclcl-1.0b13 make failed! Exiting ... How can I solve the abobe problem and install NS-2.27 in Cygwin environment?...What to do to overcome this?. please help me out thnx
[ns] Change trace file during simulation?
Hi all, This is my first message on this mailing list. The trace file generated in my simulation is huge and I decided to parse it using awk during the simulation and delete it from time to time. I managed to run awk on the file, but the problem is that I can't change the trace file of the simulation so that it continues tracing in a brand new file. Does anyone know how to change the tracing destination in ns2 during the simulation?
