[ns] initialEnergy value
Well, I am running a simulation in which I wanted to obtain a real environment, thus I tried to calculate how many joules I have in a Duracell AA MN1500 battery. In the end I got 30779.754 (doubled the result as I use two batteries). So: 40 $ns node-config \ 41 -energyModel EnergyModel \ 42 -initialEnergy 30779.754 Ok, but first of all: I ain't sure about the reliability of this result, and second of all: After sending 2200 messages, each of them with a Pt_ that covers like 260m, my energy remaining is 30778.725489. After that I still would be able to send more ~30778*2200 msgs, what seems incredibly wrong. (To be more precise, these are the values of Pt_ and Pt_consume_: Pt_ = 3.16227e-3 Pt_consume_ = 76.2e-3) That way, I do not know whether my initialEnergy has a too high value due to incorrect math, or if there is something wrong with the energy consumption. Anyone know a reasonable value for initialEnergy, considering that I want to simulate two AA alkaline batteries? Or if there could be anything wrong in my energy consumption? Thanks in advance, -- Fernando Henrique Gielow - UFPR - NR2 Computer Science graduation student.
[ns] Xgraph Bandwidth? + ns 2 trace analyzer 0.3 installation ?
Hi Everyone! I wrote the code to see the graph of BW occupied by one of the nodes in the trace. Can I display the graphs of other parameters as well. For example if I wish to display the graph of beacon interval vs speed of mobile, what changes do I need to make. Can someone please guide me to the respective tutorial. I am trying to install trace analyzer 2009 on open suse. I have downloaded and extracted the files. What next? I mean what do I do to run the application. There is a file named Makefile but it is some piece of code. Please write back soon. Faraz
[ns] Defining transmission range of node?
Hi Everybody! Could any one tell me how to define the transmission range of an access point (AP) in ns-2.33. I want to restrict its signal from reaching the mobile nodes outside its coverage area. Please help me on this. Faraz
[ns] Accessing my agent from inside a timer
Well, to define a timer I used instructions:
http://www.cubinlab.ee.unimelb.edu.au/~jrid/Docs/Manuel-NS2/node105.html
like this:
class MyTimer : public TimerHandler {
public:
MyTimer(MyAgentClass *a) : TimerHandler() { a_ = a; }
virtual double expire(Event *e);
protected:
MyAgentClass *a_;
};
Then define expire:
MyTimer::expire(Event *e)
{
// do the work
// return TIMER_HANDLED;// =\ do not reschedule timer
// return delay;// =\ reschedule timer after delay
}
However, I want to change some variables of my Agent from inside my timer,
and whenever I change them, this changes do not take effect outside the
timer. For example, suppose I have a boolean variable called
beTentativeHead in my agent, and before entering the timer::expire, it was
false.
If I try to set it true from inside timer::expire with :
a_-beTentativeHead=true, it will remain true inside timer::expire, but if
I try to access this variable inside my Agent, its value remains as the
old false.
Any idea of how should I proceed to solve this? I tried using a double
pointer to my agent, even though I thought it was not necessary, and it
did not work very well, anyway.
Thanks in advance,
--
Fernando Henrique Gielow - UFPR - NR2
Computer Science graduation student.
[ns] sleep and wake up nodes
Hello, Can you please tell me how to sleep and wake up a node from the tcl interface? Thank you. __ Ne pleurez pas si votre Webmail ferme ! Récupérez votre historique sur Yahoo! Mail ! http://fr.docs..yahoo.com/mail/transfert_mails.html
[ns] [bug] 802.11 xRetryLimit_ implementations incorrect
[Bug Report]
-
Category: Other
Package: ns 2.33
OS:WindowsXP
Environment Variables:
LD_LIBRARY_PATH=
TCL_LIBRARY=
TK_LIBRARY=
-
Description:
Description of Problem:
The 802.11 implementations of ShortRetryLimit_ and LongRetryLimit_ are
incorrect: if you set the ShortRetryLimit_ to 7, you would expect the STA to
retry for 7 times (total number of transmissions of 8). However, ns-2.33 STA
only retransmits 6 times (total number of transmissions of 7). The same happens
to LongRetryLimit_. This doesn't conform to the IEEE 802.11 standard which
specifies STA to give up when SLRC reaches aLongRetryLimit, or when SSRC
reaches dot11ShortRetryLimit. In the case of ns-2.33, STA give up before
reaching the RetryLimit!
The problem is in mac-802_11.cc:
Mac802_11::RetransmitRTS() {... if(ssrc_ = macmib_.getShortRetryLimit()) ...}
Mac802_11::RetransmitDATA() {... if(*rcount = thresh) ...}
Fix: The conditions should be instead of =, as follows:
Mac802_11::RetransmitRTS() {... if(ssrc_ macmib_.getShortRetryLimit()) ...}
Mac802_11::RetransmitDATA() {... if(*rcount thresh) ...}
How Easily Reproducible:
(e.g. every time, intermittent, once only, etc.)
every time.
Steps to Reproduce:
(describe the minimal set of steps necessary to trigger the bug)
1.
2.
3.
Actual Results:
(describe what the application did after performing the above steps)
Expected Results:
(describe what the application should have done, were the bug not present)
Additional Information:
(the following infomation is helpful to debug:
1. simulation script, detailed output files, packet trace
2. patch file if you modify some source code
3. a backtrace from gdb if you get a segment fault
If they are big files, PLEASE put them in your web space and
include the URL here.)
[ns] Packet manipulation in the queue using ns2.33 on vista
Dear all, Ive just made some changes in the queue class within the Queue::recv(Packet* p, Handler*) function! 4 bytes are added to each packet in the queue bevor fowarding the packet to the target. The default packet size is 1000 bytes (set in the ns-default.tcl file). Compiling the simulator was successful but when running simulations I got a segmentation fault message! Do you think that the segmentation fault is due to the new size of the packets or is it something else? How would I be eventually able to fix that?! Many thanks in advance. Dan.
[ns] please how can i generate VBR (video) traffic in ns2
Dear all, please help me how can I generate a video traffic or VBR traffic and how can I simulate H.264 Thank you in advance Anas KFUPM
[ns] How to determine the link number for wireless networks?
Hello Everyone, I am able to calculate the number of drop packets through C++ code. Everything is working fine except that I cannot determine that the number of drop packets are related to which Link. I have seven links and the number of drop packets on every link is different. I am getting different values but cannot identify that to which link this value belongs to. Is there any way by which we can print the Link number (e.g.: Link 2 - 3) through C++ code?? Thank you so much Sincerely, Mohit P. Tahiliani
