[ns] mapping problem
Hello, If i change the any .tcl file in ns/eurane,have i got to change the .cc file also? Is the mapping done automatically or do we need to affect the changes?Because i have created the topologies as required for a network by changing the .tcl file.Still some problem with timer is occurring.Could anybody help me out in this regard.Any suggestions are welcome. Thanks in advance. - Heres a new way to find what you're looking for - Yahoo! Answers
Re: [ns] CIMS/NS-2
i don't have them. ask the web site owner; when you get them, I'll happy to provide a mirror im my page Pedro Estrela On 1/12/07, Ameera AL-Durazi [EMAIL PROTECTED] wrote: Dear Sir, I have got linux RedHat 8.0 but the problem know that when I go to the link that you give to me which is http://www.infotech.tu-chemnitz.de/~knoll/NS2/Installing_old_NS2_version_ns-allinone-2_1b6a_on_RedHat_8_0.php it gives me error when I try to download the patches that included in the link , so could you send me these patches Thanks , Ame -- From: *Pedro Vale Estrela [EMAIL PROTECTED]* Reply-To: *[EMAIL PROTECTED]* To: *'Ameera AL-Durazi' [EMAIL PROTECTED]* CC: *ns-users@ISI.EDU* Subject: *RE: CIMS/NS-2* Date: *Wed, 10 Jan 2007 14:16:01 -* http://tagus.inesc-id.pt/~pestrela/ns2/mobility.html#_Toc147660119 http://www.infotech.tu-chemnitz.de/~knoll/NS2/Installing_old_NS2_version_ns-allinone-2_1b6a_on_RedHat_8_0.php The problem is the GCC compiler, which should be at least 2.95 or older. When you can install the original ns2.1b6 without errors, then you'll know that you are on the right track. Pedro Vale Estrela -Original Message- *From:* Ameera AL-Durazi [mailto:[EMAIL PROTECTED] *Sent:* quarta-feira, 10 de Janeiro de 2007 10:19 *To:* [EMAIL PROTECTED] *Subject:* CIMS/NS-2 Dear Sir, I am doing a project on CIMS ns-2 , but I have seen that the one of the requirment of the CIMS software is linux RedHat 8.0 , but I dont that version so is it ok if I use RedHat 9 to add this patch to my ns-2 ??? Thanks, Ame -- Express yourself instantly with MSN Messenger! MSN Messengerhttp://g.msn.com/8HMAEN/2737??PS=47575Download today it's FREE! -- FREE pop-up blocking with the new MSN Toolbar MSN Toolbarhttp://g.msn.com/8HMBEN/2752??PS=47575Get it now!
Re: [ns] random number not really random in my script [SOLVED]
hi all, for the sake of completion. Luqman wanted us to know: Though errors are inserted in the received packets these errors occur at the same place during every run of simulation. I think this is not intended so. Random variable should contain different numbers every time random function is called. After reading up in the ns-manual while searching for random and seed, I found that ns-ransom 0 choses the seed at run time whereas otherwise a static seed was being used. Hope this helps others with same questions. Regards, -- Luqman
[ns] 802.11g Simulation
Hi, I need to simulte an 802.11g environment using NS2. Since NS2 has no direct implementation of this, and furthermore, since 802.11g is quite similar to 802.11b, I guess it would be OK to use it, with the appropriate settings. Has anybody done a similar simulation earlier? if so, I could use some help on this. thanks in advance, Hisham
[ns] TCP traffic modeling
Hi All! How can i set delay variation for each packet in one TCP flow? Thanks in advance! Best regards, Alex!
Re: [ns] NS tutorial update proposal
Hi Pedro, You are, of course, 100% correct - the tutorial is outdated and its very confusing to first time users. One problem is that, in general, NS2 users ask much, but contribute little when they have their questions solved - either by the help of somebody, or by their own. Your statements match very close my first impression as NS2 newbie. Reading through the mailing list archive helps, but I also noticed that - compared to other groups - there are very, very few people (won't mention names ;) who regularily answer questions - thanks to you and to the other members for their help and time. As about the reason for the rather low feedback on the mailing list I can only speculate: on one hand, the plain NS is pretty complex, and people new to NS seem to try the minimum effort approach - instead of searching through the archive they immediately send their question to the list. This yields a high ratio of noise traffic. As soon as users become familiar with NS they focus on their specific task and many of them no longer actively participate in the list. On the other hand the high number of patches, releases, and variants (moreover the incompatibility of some of these patches with each other) make answering questions on NS more difficult. In addition it seems to me that NS is used mainly in the academic field, where people usually leave after having completed their project (paper, thesis, etc.) - sadly enough sometimes without leaving behind any usable documentation of their patches/modules. So it's up to us (academics, be it students or supervisors) to make sure that we contribute something back to the community - and prepare students for real life by forcing them to document what they have done and giving this back to the community. Only as an example, regarding chapter VII of Marc's tutorial - in half an hour the person who changed the ping sources and included the sources into the NS distribution could also have updated the related web pages. If someone else is expected to do this, it takes him definitely longer to find out what exactly was changed and why... I tried to include all details that I have noticed into my posting but I'm almost sure that I skipped some. Some examples from my personal experience: http://mailman.isi.edu/pipermail/ns-users/2006-June/056015.html http://mailman.isi.edu/pipermail/ns-users/2006-January/053560.html Yes, it's sad - but I repeat myself: the problem is that those who have gained a medium level of experience in NS and who have used the work of all previous NS developers are the target group for these contributions - having spent two days on NS does not give me the experience to find out all changes (and the reason for these changes). Regarding this particular topic, what I suggest is to: - create a page about NS2 tutorials in the NS2 wiki, which could be used to detail the important changes for recent versions of NS2 of this, and possibly other tutorials. Good idea, but I see the tutorial maintenance as an orthogonal task to what you have proposed. The tutorial pages have such a high rating in search engines (like Google) that users will find the initial tutorial first. So imho the only way how to solve the problem is to keep synchronized the text and sources of these tutorials first - or take them offline, which is also not the solution that I'd like to go. However, in my opinion, major improvements in problems like this will only be possible if more users take the action to contribute. I completly agree with your point of view. Thanks anyhow, best regards --Joachim
[ns] Need Some Changes on IEEE 802.11 Mac Layer.
Dear All, In ECS: an Enhanced Carrier Sensing Mechanism for Wireless Ad-hoc Networks Paper. Authors proposed we can select Best Value For EIFS Based on Frame Length. We know : RTS: 20 bytes, CTS: 14 bytes,ACK: 14 bytes. But Frame length CTS and ACK is Equal. Authors proposed we can increase CTS value to 17. 1- But,How can we do this change in NS2.27? On Next step: Based on Frame length we select a good Value for EIFS: Proposed Values : EIFS(RTS) = SIFS + TxTi m e (CTS ) ; EIFS(CTS)=SIFS+TxTime(Max-Data-Length) ; EIFS(Data)=SIFS+ TxTime(ACK ) ; EIFS(ACK) =DIFS ; EIFS(collisionorunknowntype) =StandardEIFS ; Example if we Receive a frame(it s size equal with 14 bytes)We can find out this frame is ACK Frame and Best Value for EIFS is DIFS. 2- Can you bring me or guide me How can i implement these condition statements? I m appreciating that hear from you as soon as possible kind Regards Hamid Reza Get your own web address. Have a HUGE year through Yahoo! Small Business. http://smallbusiness.yahoo.com/domains/?p=BESTDEAL
Re: [ns] random number not really random in my script [SOLVED]
On Jan 12, 2007, at 8:00 PM, [EMAIL PROTECTED] wrote: for the sake of completion. Luqman wanted us to know: Though errors are inserted in the received packets these errors occur at the same place during every run of simulation. I think this is not intended so. Random variable should contain different numbers every time random function is called. After reading up in the ns-manual while searching for random and seed, I found that ns-ransom 0 choses the seed at run time whereas otherwise a static seed was being used. Hope this helps others with same questions. Right, the way that the RNG in ns-2 is setup, the default seed is the same every time unless you change it. If you want to make sure that the different runs of your experiment are independent, you should use the substream feature available in ns-2. A further description of this can be found in Section 4 of this paper: M.C. Weigle, Improving Confidence in Network Simulations, Proceedings of the Winter Simulation Conference, Monterey, CA, December 2006, pp. 2188-2194. http://www.cs.odu.edu/~mweigle/papers/wintersim06.pdf This paper also contains the same example found in the ns Manual at http://www.isi.edu/nsnam/ns/doc/node265.html Essentially, you want to call next-substream enough times to advance the random number stream past where you used it in the previous experiment. For example, if you want to run the experiment 3 times: 1st experiment - call next-substream 0 times 2nd experiment - call next-substream 1 time 3rd experiment - call next-substream 2 times Be VERY careful with setting the seed according to the time of day. Unless you print out the seed and record it, you won't be able to reproduce an experiment exactly. More importantly, if you set the seed by the time-of-day, there is no way to guarantee that the multiple runs of your simulation are independent. -Michele -- Michele Weigle Assistant Professor Department of Computer Science Old Dominion University Norfolk, VA 23539 mweigle at cs.odu.edu http://www.cs.odu.edu/~mweigle/
[ns] error information of installing iNSpect in Fedora Core 5 linux
Dear all, I have installed OPenGl,When I install iNSpect in Fedora Core 5 linux ,At last it remainds me that : . -I/usr/include/cairo -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/share/inspect/iNSpect/gtkglext/include/gtkglext-1.0 -I/usr/share/inspect/iNSpect/gtkglext/lib/gtkglext-1.0/include -I/usr/include/gtk-2.0 -I/usr/lib/gtk-2.0/include -I/usr/include/pango-1.0 -I/usr/include/cairo -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/atk-1.0 eventBuilder.cpp eventBuilder.cpp: In constructor ‘eventBuilder::eventBuilder()’: eventBuilder.cpp:39: 错误：‘eventThreadFunc_readTwoMobility’ 在此作用域中尚未声明 eventBuilder.cpp:40: 错误：‘eventThreadFunc_readSomeLines’ 在此作用域中尚未声明 make: *** [eventBuilder.o] 错误 1 strip: 'iNSpect': No such file If you help me,I will be appreciate you! best wishes for you! Wang Junwei Hefei University of Technology Hefei China
