[ns] MAC_802_11 Sendup and Senddown delay
Dear all, I want to add an additional delay (suppose: a variable called delay2_ ) to the NefIF of my node, so that all the packets sent from/to the WirelssPhy are scheduled to go through this delay. I want to investigate the MAC performance (throughtput) of the system when this delay is increased from zero to the point where the system's throughput becomes zero again. I have been advised to check wireless-phy.cc/h, phy.cc/h (sendup and senddown function) and add some codes there. But don't know where and what to add. I have studied most of the c++ codes of the related files (including: mac-802_11, Phy, wireless-phy,mac-timers, scheduler) and have a fair amount of understanding there. The other point given was that I have to create a 'timer' so that all the packets are scheduled by this timer i.e.s.schedule(delay_handler_, p, delay2_). How do I do this? (do I write a new class in the mac-timers.cc/h ? ) Just to let you know that I have never carried out any changes in the c++ files of NS-2. After I did this, what should I do in order that NS-2 works with these new codes? Looking forward to your suggestions, Many thanks Ben PhD Researcher Department of EE @ UCL.
Re: [ns] MAC_802_11 Sendup and Senddown delay
Hi, As far as I can remember, there is already a delay Queue implementation in the ~/ns-2.2x/queue directory. This does the delay at packet level and not MAC level, so I don't know if will really fit your needs. The queue can be configured to apply a random delay too to the incoming packets. All you have to do is to configure your nodes w/ -ifqType Queue/DelayQueue (I really don't remember its exact name) Hope it helps, Ilyes Gouta. Bahman Kalantari Sabet wrote: Dear all, I want to add an additional delay (suppose: a variable called delay2_ ) to the NefIF of my node, so that all the packets sent from/to the WirelssPhy are scheduled to go through this delay. I want to investigate the MAC performance (throughtput) of the system when this delay is increased from zero to the point where the system's throughput becomes zero again. I have been advised to check wireless-phy.cc/h, phy.cc/h (sendup and senddown function) and add some codes there. But don't know where and what to add. I have studied most of the c++ codes of the related files (including: mac-802_11, Phy, wireless-phy,mac-timers, scheduler) and have a fair amount of understanding there. The other point given was that I have to create a 'timer' so that all the packets are scheduled by this timer i.e.s.schedule(delay_handler_, p, delay2_). How do I do this? (do I write a new class in the mac-timers.cc/h ? ) Just to let you know that I have never carried out any changes in the c++ files of NS-2. After I did this, what should I do in order that NS-2 works with these new codes? Looking forward to your suggestions, Many thanks Ben PhD Researcher Department of EE @ UCL.
[ns] Developing DSR protocol, problem request:
I am trying to develop dsr protocol with new ideas, and I did investigate C++ codes, NS-2 Manual the email archive. I am using ns-2.29 So far Im facing two problems I have a request: First In trace file, the dsr flag related to routing request (-Pq: Routing Request Flag) does not give the value 1 (ALL TIME) to indicate that this is dsr request packet, however I used lots of different Topologies, Connections scenarios, Movement scenarios. That forced me to investigate the C++ code related to it, and I found that the related code that is responsible to show the route request flag is [srh-route_request()] and this should be set to equal 1 in case that we have route request packet! Some of the code in file dsragent.cc DOES NOT contain such a code when it is - for sure - route request, So I did added [srh-route_request()=1]. And still I dont get Routing Request Flag (-Pq: 1)! Can any body explain that? The trace file is exist in ~/trace/cmu-trace.cc Second - I am trying to add some new flags in a way similar to route request! I did typical similar code to file hdr_sr.h I added to file dsragent.cc and set it to 1 always just to see it in trace file, and I always get strange values (such: -1425044999) instead of 1, which leaded me to think that it may access the address of it instead of the value itself! I did review it review the pointers access in C++ information, and I did add the setting to value 1 within different files, but still get strange values (-1425044999) My request Can any body explain to me what is going on? And if there is any ideas to make the flag appear correctly? . . . . = Tariq Alsaifi, PG Mail, Merz court, School of EECE, University of Newcastle, Newcastle-upon-Tyne, NE1 7RU
[ns] : Found Error in cmu-scen-gen / cbrgen.tcl
Hi, I found an error in the cmu's script to generate traffic pattern. The file is ns_dir/indep-utils/cmu-scen-gen/cbrgen.tcl My ns version is ns-2.29 Error is in lines 166 and 183: you must change [expr $opt(nn) + 1] with [expr $opt(nn)]. I think that this correction follows directly from basic modular math. In fact without this correction node index, for a set of nn node, has a range from 0 to nn, instead that from 0 to nn-1. Am I right? Aledep Milioni di oggetti, impossibile non trovare quello che cerchi. Dallo spillo all'elefante, non ti stupire. Sei su eBay! http://adfarm.mediaplex.com/ad/ck/724-7199-4110-179?id=2
Re: [ns] Error: Segmentation Fault (Core Dumped)
How about using gdb or valgrind to trace the problem? Jongman. 2006/4/30, Tomáš Pataj [EMAIL PROTECTED]: Hi NS users, I tried to make some changes in DiffServ module according to Sergio Anderozzi DiffServ patch. His patch is functional in version NS-2.1b8a. Patch is here: http://www.cnaf.infn.it/~andreozzi/research/network/download.html http://www.cnaf.infn.it/~andreozzi/research/network/diffserv.patch I tried to rebuild his add-ons to version NS-2.29. I make changes and compiling seems to be OK but when I run some examples from Sergio: http://www.cnaf.infn.it/~andreozzi/research/network/example.html Always I will get Error mesage: Segmentation Fault (Core Dumped). Can you help me where is problem or how I can change patch or examples? I would appreciate any help Thank you Tomas Pataj -- = Jongman Heo
Re: [ns] [bug] Build failure on 64-bit Mandriva 2006.0
The final link stage where the executable ns is supposed to be built is failing with the following error (after applying Tom Henderson's suggested fix to the problem regarding teh X libraries): ... most of command elided for clarity... mp/ns-allinone-2.29/otcl-1.11 -lotcl -L/tmp/ns-allinone-2.29/lib -ltk8.4 -L/tmp/ns-allinone-2.29/lib -ltcl8.4 -lnsl -ldl -lm -lm `.gnu.linkonce.t._ZN11taskPending10taskStatusEh' referenced in section `.rodata' of wpan/p802_15_4mac.o: defined in discarded section `.gnu.linkonce.t._ZN11taskPending10taskStatusEh' of wpan/p802_15_4mac.ocollect2: ld returned 1 exit status make: *** [ns] Error 1 Ns make failed! I've never seen anything like this error before, and have no idea how to fix it. Doc
[ns] why noone wants to help me? :(
I'm sorry that I am writing in such way, but I really need help. I am trying to install ns-2.1b7a because I want to patch gprs wrote by Richa Jain. I tried installing it and I have such error: tclcl-mappings.h: In static member function #8216;static int TclObjectHelperT::dispatch_(void*, Tcl_Interp*, int, char**)#8217;: tclcl-mappings.h:51: error: incomplete type #8216;Tcl#8217; used in nested name specifier tclcl-mappings.h:52: error: invalid use of undefined type #8216;struct Tcl#8217; tclcl-mappings.h:41: error: forward declaration of #8216;struct Tcl#8217; tclcl-mappings.h:57: error: invalid use of undefined type #8216;struct Tcl#8217; tclcl-mappings.h:41: error: forward declaration of #8216;struct Tcl#8217; make: *** [Tcl.o] Error 1 tclcl-1.0b10 make failed! Exiting ... See http://www.isi.edu/nsnam/ns/ns-problems.html for problems I don't know what to do? I have fc4. I cannot patch gprs to ns-2.29 beacuse it doesn't work. Please help me Real thanks!!!
Re: [ns] why noone wants to help me? :(
Did you already look to this page: http://zzlinux.blogspot.com/2004/12/ns2-building-experiences.html Good luck... -- Tiago Camilo PhD student Laboratory of Communication and Telematics University of Coimbra Quoting [EMAIL PROTECTED]: I'm sorry that I am writing in such way, but I really need help. I am trying to install ns-2.1b7a because I want to patch gprs wrote by Richa Jain. I tried installing it and I have such error: tclcl-mappings.h: In static member function #8216;static int TclObjectHelperT::dispatch_(void*, Tcl_Interp*, int, char**)#8217;: tclcl-mappings.h:51: error: incomplete type #8216;Tcl#8217; used in nested name specifier tclcl-mappings.h:52: error: invalid use of undefined type #8216;struct Tcl#8217; tclcl-mappings.h:41: error: forward declaration of #8216;struct Tcl#8217; tclcl-mappings.h:57: error: invalid use of undefined type #8216;struct Tcl#8217; tclcl-mappings.h:41: error: forward declaration of #8216;struct Tcl#8217; make: *** [Tcl.o] Error 1 tclcl-1.0b10 make failed! Exiting ... See http://www.isi.edu/nsnam/ns/ns-problems.html for problems I don't know what to do? I have fc4. I cannot patch gprs to ns-2.29 beacuse it doesn't work. Please help me Real thanks!!! This message was sent using IMP, the Internet Messaging Program.
[ns] About setting meanPktSize value in DiffServ
Dear NS users, In DiffServ scenarioes, we need to set meanPktSize to let RED calculate average queue size. If we only have one physical queue, then we can set meanPktSize to be the packet size of the traffic through that queue. My question then is, if we have multiple physical queues, say 3, then how can we set meanPktSize value? It seems to me that different physcial queue needs to use different meanPktSize values to accurately calculate the averge queue size for each physical queue. PS. the examples in DiffServ module in ns distribution cannot help to answer this question. Looking forward to your answer, many thanks, Tony
