General :: Wireless Network Simulation Using Ns2?

Mar 10, 2011

im doing my final year project on wireless network simulation using ns2.. how to simulate protocols in ns2.

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General :: Implementing Wireless Sensor Network In Omnet++ 4.1 Simulation Tool?

Oct 2, 2010

i m trying to implement wireless sensor network in omnet++ 4.1 simulation tool but that tool is not supported.so i m installing framework mixim 1.2 in omnet++ that support wireless and mobility feature.now i have problem that how to create sensor network in omnet++4.1 using mixim 1.2?if any body

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Software :: Acoustic Simulation Program Or - Sound Wave Simulation Program

Feb 21, 2010

I am looking for a very particular sound wave simulation program. To get an understanding of what i want let me describe it to you in a different way.

Imagine your look at a bowl of water from above and you poke the water at a specific frequency you will see wave patterns showing. Well im after a program that can generate that pattern with any particular frequency that i set, and to allow me to place different shapes and objects around the sound source or sources (i may want to use more than one sound source that may or may not be at the same frequency as first.) and see what kind of reflections i get.

I was also wondering if instead of a point sound source you could have an entire shape giving off a specific vibration. This will give very interesting results that i am also after.

There are some programs that show sound simulations that i have described but nothing that can do the requirements that i desire. Do any of you guys know of any programs that can do this? if not how much would it cost to build such a program?

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General :: Making Graphs Of A Simulation?

May 28, 2011

making My simulation graphs in Ns-2.34 in ubuntu how i can make them. my simualtion is about Home automation lighting control and i wnated to make 6 graphs1) time VS Residaul energy ( remaining enregy of the nodes)like sensors (we have mentioned Insteon sensor and Switchlinc Dimmer)use 9V battery in them. the 9V should be converted in joules and Energy on Y-axis should be in Joules and time on X-axis should be of simulation timeThe graph would be showing after running the simulation 3000 times how much energy is remaining or how much energy is consumed in the nodes after sending 2000 packets.2) Packet size Vs Delay, Delay on Y-axis and Packet size on X-axis with there units and the graph would be showing if Pacjet size increases how much delay is created.3) Throughput Vs Badwidth. througput on Y-axis and Bandwidth on X-axis4) Packets Loss Vs data rate5) Packets sent Vs data rate6) Packets received Vs data rate

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General :: Use Virtual Simulation Software Such As VirtualPC, VirtualBox And VMWare To Install?

Mar 4, 2009

1. Why do we need to use virtual simulation software such as VirtualPC, VirtualBox and VMWare to install linux?

2. Why linux OS always came with newer version and updates?

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General :: Way To Prevent Network Manager From Storing Password For Wireless Network

Sep 27, 2010

Our corporate wireless network uses continuously changing passwords with RSA tokens.So every time we need to connect to the wireless we need to enter a new password off the RSA token. For extra fun using the wrong password a couple of times in a row causes the users account to be locked.Network manager automatically stores and reuses the password, with the net result that it is constant getting my account locked.Is there some way to prevent it from storing my password for that network?

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OpenSUSE Wireless :: When Click The Button To Connect To A Wireless Network This Message Apears:Network Management Disabled?

Mar 23, 2010

When i click the button to connect to a wireless network this message apears:Network management disabled

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Software :: Tora Simulation Does Not Come To An End In Ns2.34?

Mar 13, 2010

I have successfully changed and configured TORA in ns-2.34 (in fedora 9), as learnt from;[URL]..Now, when I run the simulation, it hangs and does not finish. If the simulation time is 20 seconds, it do completes but for simulation times more than 20 seconds, it never comes to an end.

Code:
num_nodes is set 50
INITIALIZE THE LIST xListHead
Loading scenario file...
Loading connection pattern file...
channel.cc:sendUp - Calc highestAntennaZ_ and distCST_
highestAntennaZ_ = 1.5, distCST_ = 550.0
SORTING LISTS ...DONE!

I have tried increasing the bandwidth and interface queue lengths but got no improvement.Please note that the same TCL scripts are running with other protocols like DSDV, AODV etc

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Networking :: Changing Bandwidth During A Simulation?

Mar 22, 2010

I'm doing some simulations (using Iperf) to obtain throughputs values of a link between two gigabit ethernet cards for different delays and different drop probability (using netem) .... Now I have to do a 3minute long simulation in which during the firstnute the bandwidth is 1000Mbit/s, 500Mbit/s during the second minute and 1000Mbit/s during ththird one....Does anybody know how can i do this type simulation

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Software :: Installing Old Version Of NS2 For ATM Simulation?

Jan 10, 2011

I am currently using Cent OS 5.4 and I was able to successfully install ns 2.34 on the machine and run a few test FTP simulations. The problem stems from the fact that the ns 2 installation used in the ATM simulation , in the link provided, uses ns2.1b7 or ns2.1b9.

I have tried to see if I could cheat and implement the patch for my ns2.34 installation but that failed flat out ( make failed with an incorrect parameter error) I then tried to download the older versions of ns that were used in the ATM Simulation, ns 2.1b9 and that failed too ( otcl make failed with g++ error) which i figured failed because I am using g++ version 4.1 . ( From the docuemntation, this particular version of the software had trouble with any g++ version > 3.2)

a) Is anyone aware of any ATM Simulation patch for the current version of ns i.e. ns 2.34?

b) Is there anyway I can confgure the patch for the ns2.1b9/7 version to work smoothly with the ns2.34 version I have installed?

c) What are the recommendations for me to install the ATM Simulation provided on the URL above.

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Fedora :: Surface Simulation On Screen With Fingers?

Jan 11, 2010

Surface simulation on screen with fingersWhat will be the solution of the captioned topic on Open Source?

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Fedora :: Electric Circuit Simulation Program?

Feb 8, 2011

What is most famous Electric circuit simulation Program in linux?? except egda or xcircuit. I want a good program like proteus in windows.

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Server :: Shell Scripting For Launching A Simulation Job?

Jun 27, 2011

I've been doing Finite Element simulations with the Ansys software for several years now, and recently I have been allowed to use a cluster running on Linux (it's a Sun Grid Engine, or SGE). Since I am quite newbie to this thing, I have read a lot on the internet to get more familiar with the Unix language. I found some example codes which are supposed to launch Ansys and read input files, but it does not work for me. Actually, what I want to do is simple:

1- I need to use Ansys 12.1 in batch mode, with the Academic Research license (which is called "aa_r");

2- The software should then read my input file (which is an APDL command file (in case you are familiar with it..)) and save the database and results in my working directory on the server.

The software is located in the following path:

/ansys_inc/v121/ansys/bin/ansys121

My working directory:

/home/myusername/

From what I've found on the web, I have to write a shell script that calls the software and specifies the details (batch mode, license name, input file, ...). Then I have to call this script by using the command "qsub".

Script: myjob.sh

Code:

#!/bin/bash
nohup /ansys_inc/v121/ansys/bin/ansys121 -b nolist -p aa_r -j jobname -i jobname.inp -o jobname.out 2>&1 &

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Software :: Will Cognitive Radio Simulation Work On NS-2.34

Jan 20, 2011

Cognitive Radio patch worked with ns-2.31 but when I tried it for ns-2.34 it did not work. Is there a separate patch available for ns-2.34 to support cognitive radio ? Or does it not work with ns-2.34 at all ?

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Software :: Bandwidth Limiter / Slow Internet Simulation?

Jul 2, 2011

need an easy to use bandwidth limiter / slow Internet simulator to test my websites. I would prefer a per application setting where I can limit, say only the web-brower etc.A GUI would be nice as wel

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General :: SSH From VM Via Wireless Network To Server

Apr 7, 2011

I have a VM running Fedora 17 on VMWare over windows 7. I want to SSH to my university server from fedora but when I try something like: ssh myuser@server.com

I don't get request for my password. If I try to SSH using PuTTY in windows, everything is OK. Then I pinged the server and got the following message:
From 192.168.0.106: icmp_seq=2 Redirect Network(New nexthop: 192.168.0.1)

It repeated over and over. I tried NAT and Bridged network connection on the VM, but I'm not sure what this means completely, so I may have messed up somewhere around here.

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General :: Keeps Disconnecting From Wireless Network?

Sep 12, 2011

I'm running Arch Linux on an Acer laptop and my wirless connection doesn't stay up. After a while it disconnects, and when I try to reconnect I get stuck with a "Waiting for authorization" message. I have to retry several times before getting the connection stay up for few minutes. This happens with both networkmanager and wicd. The strange thing is that the iMac that sits next to the laptop connects fine, and when I use my laptop within the university wireless network it works normally.

EDIT: I've tried to connect manually following the steps

iwlist wlan0 scan
wpa_supplicant -i wlan0 -c /etc/wpa_supplicant.conf
dhcpcd wlan0

[Code].....

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General :: Wireless ICS Network Without A Router ?

Feb 5, 2010

I have a desktop running Ubuntu 9.10 with a D-Link WUA-1340 (Supported - last on list) USB wireless adapter, through which I would like to set up a wireless network for internet connection sharing at home.

I have 2 ethernet adapters on my desktop (Eth0, Eth1), and an Apple Airport Express, which I initially tried to use, then thought it might be better to just bypass the Airport Express.

My problem is that although I create a wireless network and connect to it with my macbook, I am unable to access the Internet on it.

I am not sure what I am doing wrong, and have worked through WifiDocsShareEthernetConnectionThroughWireless a few times, as this seems to be exactly what I am trying to do.

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Fedora :: Xterm Command - Running Molecular Simulation Software

Jun 17, 2011

I am quite new to Linux and fedora. I am trying to run some molecular simulation software whose shell scripts create X windows with the xterm command. How do I get xterm on Fedora 14?

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Ubuntu :: Change Queue Parameters Dynamically During The Simulation Under NS2 Simulator?

Sep 19, 2010

I want to change parameters of a RED queue during the simulation but it seems that some parameters can be modified only before starting the simulation, not dynamically, while the simulation is in progress. For example the following subroutines works before $ns run command but it do not change the behavior of the queue during the simulation( I want to change maxthresh_ and thresh_ after $ns

run command): Code: proc setREDParameters { redQueue MINth MAXth PER_MaxP Wq } {
$redQueue set thresh_ $MINth
$redQueue set maxthresh_ $MAXth

[code]....

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Software :: Meaning Of Traffic And IT File Generated After Simulation In CRCN

Mar 2, 2011

How to analyse the IT and Traffic file generated in CRCN simulation? What they represent i.e what is the format?

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General :: Authentication Required By Wireless Network

Mar 9, 2010

I would like to use a wireless network from Ubuntu. In the network drop-down menu I select a network (this is a University network I have an account there). Then I get a windows with the following fields:

Wireless Security: [WPA&WPA2
Enterprise] Authentication:
[Tunneled TLS] Anonymous Identity:
[] CA Certificate: [(None)]
Inner Authentication: [some
letters] User Name: []
Password: []

I put there my user name and password and do not change default value and leave "Anonymous Identity"blank.

As a result of that I get "Authentication required by wireless network". How can I solve this problem?

I think it is important to notice that our system administrator tried to find some files (which are probably needed to be used as "CA Certificate"). He said that he does not know where this file is located on Ubuntu (he support only Windows). So, probably this is direction I need to go. I need to find this file. But may be I am wrong. May be something else needs to be done.

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General :: Iwconfig - Can't Configure Wireless Network

Mar 6, 2011

I've beenhaving some trouble getting my wireless network card working on my Slackware 12 box. Currently it identifies the card and can scan for networks, but I can't seem to join a network. Here's some output:

{8:46:29}gibson:/lib/modules/2.6.33.4-smp## iwlist wlan0 scan
wlan0 Scan completed :
Cell 01 - Address: F8:1E:DF:FF:DA:39
ESSID:"MasterControl"

[code]....

It doesn't seem to be accepting the essid setting, and it's giving an error for the key setting. Also, I'm noticing an inconsistency in the wireless protocols. The AP claims that it's 802.11g with rates up to 54 Mb/s. But it should be 802.11n. It's an Apple Airport Extreme and the Radio Mode is set to Automatic and displays "802.11a/n-02.11b/g/n" on the Airport Utility. The interface also claims that it's 802.11g, though shows a rate of 300 Mb/s. It's a Belkin "Play" Wireless USB Adapter (F7D4101).

(Note: I'm using ndiswrapper and the WinXP drivers which were installed from the Belkin software.)

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General :: Connect To A Wireless Network Shared By A Mac?

Mar 9, 2011

Mac OS X has built-in support for internet connection sharing through the settings as in the following screenshot:

This works very well with other Macs, but I'm having problems connecting to such a network using Linux. I tried all combinations of configuration, double- and triple-check the WEP password but could never get an IP address. In a last effort I also tried without encryption, but still couldn't get my Linux box connect to the network.

I don't know if Windows has the same problem. Now I'm suspecting two things. Either I misconfigured something in my Linux installation, or OS X is doing something smart and makes it difficult for non-Apple devices to use the network (I also tested with an iPhone, it connects very well, unsurprisingly). Now what is wrong? What do I have to do?

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General :: Ubuntu & Wireless Network - Does Not Connect?

May 3, 2011

Tried the live boot of Ubuntu 10.04 LTS on my work PC today (it has Windows Vista on it and it is literally DEAD slow). There's a wireless network in the office and the PC has a wireless network card installed.
The problem was the following - I booted up Ubuntu, the "tray" was showing the network icon. I click on it, it shows me the list of all available wireless networks. I click on the one that belongs to our office, enter the password, click "Connect".

Now, here comes the problem - after "loading" for some three minutes, the same window pops back up. No errors, no messages, absolutely nothing. The password is correct because the Windows installation and the other PCs in the office can connect just fine. Anyone knows what could be the problem? The drivers are apparently fine if it can find the networks and detect the connection encryption correctly.

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General :: Internet - Cannot Connect To The Wireless Network

Jan 2, 2011

I am a LINUX newbie using Ubuntu. I love it so far but I am having issues. I cannot connect to the wireless network that I am using with my other Windows PC. The problem in my opinion is that the wireless device I use isn't operating. No light comes on the device. I am not sure how to "find hardware" with Ubuntu.

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General :: Cannot Connect To Wireless Network In Ubuntu 10.04

Jul 1, 2010

I have ubuntu 10.04 netbook edition running on dell mini 10 and i cannot connect to my wireless network. I entered in everything on the editing wireless network section of ubuntu. However when I try to enter in the mac address as soon as I start typing the apply button becomes unactive. I have entered it before and I did connect to my wireless net with my netbook. However I tried top connect this morning and I wouldn't let me! I did not connect automatically to my wireless net work as it had before. I am typing this message on my desktop using the same internet connection so, I know that the net is active.

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General :: Connect To Wireless Network Arch

May 12, 2011

I just install arch linux yesterday. And I have an issue with the wireless connection. I can see wireless connections, when i click on thet networkmanager. But I cannot connect. If I remove WPA or any security from the wireless connection(from my wifi router) I can connect to wireless network without any issue. But when there is any security is involved to the connection it does not connect. How to connect to wireless. I've been using debian for a long time, but there was no any issue with this connecting thing. I am new to arch linux.

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General :: Fedora 13 - Can't Access Wireless Network

Sep 10, 2010

I got a development machine with Apache installed. Everything was configured correctly, machine was running perfectly for some time, but today, suddenly I lost connection to my Wireless network.

Now I simply...can't access it. All details are correct, I even turned off MAC Addresses validation to make sure it's not my AP configuration fault. Nothing helped.

Any ideas what could happen? I did not update any libraries/packages. Just got disconnected from my network and cannot access it anymore.

To give more informations: I'm using Broadcom wireless device and b43 driver but I don't think this can be an error. Logs tell me nothing.

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General :: NetworkManager Can't Get Wireless Network To Work?

Aug 23, 2010

I just loaded Suse 11.3 on my laptop. I can't get my wireless network to work. I tried via Yast and then switched back to Network Manager but nothing works.NM says that it is running, however I have no way to access it. No icon and I don't know where it is located or how to add to desktop panel.

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