[ns] Multi-interface support howto, by Ramon Aguero
Hello, did any one implement the extension of ns-2 for multi-channel from Ramon Aguero at: http://personales.unican.es/aguerocrhttp://personales.unican.es/aguerocr many thanks for Ramon Aguero for his Dokument. i have some problems at Chapter 5, where to add the listing 5.3 Listing 5.5 and Listing 5.6 in routingAgent.cc. (AODV.cc) i choice the AODV ad hoc routing agent to change. i think i can copy the Listing above 1 by 1 to the AODV.cc. thanks - NEU: Fragen stellen - Wissen, Meinungen und Erfahrungen teilen. Jetzt auf Yahoo! Clever.
[ns] How to disable all the trace outputs
Dear All, I'm simulating a wireless network with 500 nodes. I have turned off all the trace options in my tcl file. However, still lines are appending to the output file and after a while the file gets huge. It really make the simulation slow. Does anybody know how can I turn off tracing completely? Thanks for your attention Babak.
Re: [ns] Multi-interface support howto
Hello Shahatha, In addition to the answers we have given before, see some more answers inline... Cheers, Ramón At 12:00 17/01/2007, you wrote: chapter 4 4.2 Listing 4.1 the variable MAX_CHANNELS i have declared it like a follow in mobilenode.h : #define MAX_CHANNELS XXX but which value? or without value? you do need to specify a value, depending on your own interests. This will set the maximum number of interfaces per node; i guess that realistically, having more than 8 would be difficult. 4.3 in channel.cc Listing 4.4: nextX_ and prevX_ should changed to nextX_ [this-index()] and prevX_ [this-index()] in the whole channel.cc. right? Yes, as stated in the document, just before the listing: Note that this has to be changed throughout the whole channel.cc file. - chapter 5 5.1 as i understand i can extend one of the protokol agents: AODV, DSDV or TORA, right? i have choice AODV. Good, probably we can extend the document with this experience. I'm not sure about TORA, since we have not seen that code at all. 5.2 MAX_IF should be declared in AODV.h with #define MAX_IF but which value? See my previous answer. in AODV.h the AODV-class i found ifqueue i chnage it to ifqueuelist[MAX_IF], and i found Trace *logtarget; but not target. i add targetlist[MAX_IF] just like in Listing 5.1. I won't delete ifqueue, since this is needed if you want to keep the legacy behaviour of the simulator. Keep the logtarget, since you need it for tracing support and add targetlist, as stated in Listing 5.1. in which mothod in AODV.cc i should add the Listing 5.3, Listing 5.4 and Listing 5.5 ? in Listing 5.5 Iface and cmnh are not declared ! All these questions have been already answered in my previous email. ps. do you have the changes as a dokument? No, since the main ns is being updated quite frequently and different people make different changes to the core files, we decided not make any code/patch available, but rather provide an extensive discussion of the required modifications, so that people can do it by themselves.
Re: [ns] Multi-interface support howto, by Ramon Aguero
Hi Shahatha, As we say in the report we didn't use aodv, so we really appreciate that you work on this, it would be good trying to extend the report with your own experience on AODV. We have been doing a quick overlook of the aodv code (which we have not personally used that much) and this is what we can tell for the listings of chapter 5: - Listing 5.3 has to be used whenever the AODV needs to send a broadcast packet, which happens, as far as we can tell, in the following methods of the aodv.cc file: sendRequest, sendError, sendHello and forward; in this latter case only when the destination address is broadcast. In all of this, you should have the following command: Scheduler::instance().schedule(target_,pkt,*); --- * means either 0 or JITTER and you should change it for listing 5.3. - Listing 5.4 has to be used instead of the unicast transmissions of aodv.cc, this time in sendReply and forward methods. In this case, the Iface variable has to be the appropriate interface index, which needs to be stored within the corresponding route table entry (see section 5.3 of the document). - Listing 5.5 is the one that allows you to get the correct interface. When you have to create a route table entry, you need to indicate the corresponding index for the output interface, which will be used afterwards to send packets (see previous answer). This means that the corresponding struct/class for your route table entry needs to be updated, so as to be able to keep this index. Thanks to the changes of the mac-802_11.cc file (listing 4.6), the required value is store on the common header of the packet, that's the cmnh variable of the listing. Iface will just hold the index that will be used for creating/updating the route table entry. After a quick overlook of the code, this seems to be needed in two methods: recvRequest and recvReply. Cheers, Ramón At 10:53 18/01/2007, Shahatha wrote: Hello, did any one implement the extension of ns-2 for multi-channel from Ramon Aguero at: http://personales.unican.es/aguerocrhttp://personales.unican.es/aguerocr many thanks for Ramon Aguero for his Dokument. i have some problems at Chapter 5, where to add the listing 5.3 Listing 5.5 and Listing 5.6 in routingAgent.cc. (AODV.cc) i choice the AODV ad hoc routing agent to change. i think i can copy the Listing above 1 by 1 to the AODV.cc. thanks - NEU: Fragen stellen - Wissen, Meinungen und Erfahrungen teilen. Jetzt auf Yahoo! Clever.
Re: [ns] How to disable all the trace outputs
Dear All, I'm simulating a wireless network with 500 nodes. I have turned off all the trace options in my tcl file. However, still lines are appending to the output file and after a while the file gets huge. It really make the simulation slow. Does anybody know how can I turn off tracing completely? Maybe you can provide (part of) your code. This would help understand the mistake. Regards, -- Luqman
Re: [ns] Multi-interface support howto
great job as far as i can see. anyway i ran into problems with ns-mobilenode.tcl: in Node/MobileNode instproc reset i couldn't find any differences to the original. i got an error, that arptable_ is an array. so i changed every arptable_ into arptable. now ns2 complains about the missing variable arptable :( any hints out there? cheers, tim Ramon Aguero schrieb: Dear all, We have seen a lot of requests about the possibility to extend the NS-2 framework to support multiple interfaces. Although there is some information available, according to the messages that have been sent to this list, it seems that a more thorough description may be required. In this sense, after performing an analysis about existing activities in this topic, we have created a document that tries to summarize which are the required changes to be performed within the different pieces of the simulator (tcl, c++) as well as how routing protocols can be adapted to make use of the new feature. The howto is entitled Adding Multiple Interface Support in NS-2 and it has been written by my colleague Jesús Pérez and myself. I’ve uploaded the document, which can be retrieved from the following url: http://personales.unican.es/aguerocrhttp://personales.unican.es/aguerocr We will be happy to receive any feedback, comments, so as to improve the howto, since we would like to have it like a living document, adding new features as they are available. Best regards, Ramón Ramón Agüero Calvo Dept. of Communications Engineering Network Planning Mobile Communications Laboratory University of Cantabria Avda Castros s/n 39005 - Santander SPAIN [EMAIL PROTECTED] Tel: +34 942 201 392 (Ext 14) Fax: +34 942 201 488
Re: [ns] How to disable all the trace outputs
a) Don't call ns trace-all or a similar lines b) write the trace to /dev/null -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of babak Sent: quinta-feira, 18 de Janeiro de 2007 10:47 To: ns-users@ISI.EDU Subject: [ns] How to disable all the trace outputs Dear All, I'm simulating a wireless network with 500 nodes. I have turned off all the trace options in my tcl file. However, still lines are appending to the output file and after a while the file gets huge. It really make the simulation slow. Does anybody know how can I turn off tracing completely? Thanks for your attention Babak.
[ns] create multiple paths in a wireless network
i use ns2.29 under cygwin win xp. I want to use 802.11 to create a wireless network. In each node i want to check congestion level(queue or channel sampling)and according to these values react by rerouting the traffic Can any one helpI will really appreciate your answer on: 1. how to check queues or channel sampling 2. reroute the traffic : i am new on ns2
[ns] Regarding energy dissipated in LEACH
Hi everyone, I have successfully install and running LEACH on ns2.27. However, I've noticed that at the end of simulation, in the file leach.out, the total energy dissipated in the systems is more that the total initial energy of all nodes. Does anyone has the similar problems that I have? For instance, I've run LEACh simulation for 100 nodes with 2J energy each initially. At the end of simulation, what I've got is: At 561.305907: Total Energy = 383.59827246392308 Total Data = 55934 Total Alive = 4 From what I know, the total energy dissipated cannot exceed 200J which is the total energy available in the network (2J/node x 100 = 200J) I've try to print out the total energy remaining and surprisingly, the value is negative. I would be very grateful if anyone that has the explanation to this problem could reply my email. Many thanks. Sincerely, Nurul
[ns] Packet Loss Problem - Event d
Hi, in my simulations each source has a different flow id. So, to calculate number of dropped packets to some source I only count the number of lines with d event to some flow ID. Why some packets are dropped and don't have event d. How to calculate loss? Sent packets minus receive packets? Or number of lines with event d to some flow id. Thanks for any help -- 2007/1/18, Alessandro Vivas [EMAIL PROTECTED]: Hi, in my simulations each source has a different flow id. So, to calculate number of dropped packets to some source I only count the number of lines with d event to some flow ID. Why some packets are dropped and don't have event d. How to calculate loss? Sent packets minus receive packets? Or number of lines with event d to some flow id. Thanks for any help -- Alessandro Vivas Andrade -- Alessandro Vivas Andrade
Re: [ns] Multi-interface support howto
Hello Tim,
thanks for pinpointing the error! Somehow I made a mistake when copying and
pasting the code to the file.
The correct procedure would be the following one (note that the arptable_
is now within the 'for' cycle). In this sense, I don't think you need to
change all arptable_ into arptable. Hope this helps.
Node/MobileNode instproc reset {} {
$self instvar arptable_ nifs_ netif_ mac_ ifq_ ll_ imep_
for {set i 0} {$i $nifs_} {incr i} {
$netif_($i) reset
$mac_($i) reset
$ll_($i) reset
$ifq_($i) reset
if { [info exists opt(imep)] $opt(imep) == ON } {
$imep_($i) reset
}
if { $arptable_($i) != } {
$arptable_($i) reset
}
}
}
Cheers,
Ramón
PS - I've already modified the document -- with the correct procedure -- in
the web page:
http://personales.unican.es/aguerocr
At 16:39 18/01/2007, Tim Elschner wrote:
great job as far as i can see.
anyway i ran into problems with ns-mobilenode.tcl:
in Node/MobileNode instproc reset i couldn't find any differences to the
original.
i got an error, that arptable_ is an array. so i changed every arptable_
into arptable. now ns2 complains about the missing variable arptable :(
any hints out there?
cheers,
tim
Ramon Aguero schrieb:
Dear all,
We have seen a lot of requests about the possibility to extend the NS-2
framework to support multiple interfaces. Although there is some
information available, according to the messages that have been sent to
this list, it seems that a more thorough description may be required.
In this sense, after performing an analysis about existing activities in
this topic, we have created a document that tries to summarize which are
the required changes to be performed within the different pieces of the
simulator (tcl, c++) as well as how routing protocols can be adapted to
make use of the new feature. The howto is entitled Adding Multiple
Interface Support in NS-2 and it has been written by my colleague Jesús
Pérez and myself.
Ive uploaded the document, which can be retrieved from the following url:
http://personales.unican.es/aguerocrhttp://personales.unican.es/aguerocr
We will be happy to receive any feedback, comments, so as to improve the
howto, since we would like to have it like a living document, adding new
features as they are available.
Best regards,
Ramón
Ramón Agüero Calvo
Dept. of Communications Engineering
Network Planning Mobile Communications
Laboratory
University of Cantabria
Avda Castros s/n
39005 - Santander
SPAIN
[EMAIL PROTECTED]
Tel: +34 942 201 392 (Ext 14)
Fax: +34 942 201 488
[ns] OLSR Simulation Parameters
Hi All, I've recently configured OLSR at NS 2.29 but when i ran tcl-example script modified for my number of nodes i've received 2 warnings regarding pattern and scenario, As show below: [EMAIL PROTECTED] simulacoes]# ns OLSR_Mesh_UFF_WRT_Base.tcl num_nodes is set 20 warning: Please use -channel as shown in tcl/ex/wireless-mitf.tcl INITIALIZE THE LIST xListHead *** NOTE: no connection pattern specified. - What Pattern ? *** NOTE: no scenario file specified. - How to specify ??? Starting Simulation... channel.cc:sendUp - Calc highestAntennaZ_ and distCST_ highestAntennaZ_ = 1.5, distCST_ = 550.0 SORTING LISTS ...DONE! NS EXITING... [EMAIL PROTECTED] simulacoes]# I went to UM-OLSR Docs (http://masimum.dif.um.es/um-olsr/html/index.html) but no reference to this. Does anyone know where to find info about that missing pattern and scenario? Thanks in Advance, Waldeck Torres
[ns] UGS traffic - WiMAX Simulation
Hi all, I have been trying to simulate WiMAX scenarios in NS2. I have used the patch from NDSL. I had defined one BS and 4 SSs'. Four UGS traffic generating agents (at BS) at the rate of 512kbps. I am able to measure the bandwidth at the SS and get a plot on X graph. But if the rate is 1Mbps or may be even 800Kbps, I am not getting any graph. Can simulation be only done at low rates or is it my system memory constraints? How do we set the Channel bandwidth? There is a parameter called Channel size which is set to 20. Does it mean 20MHz. How many Mbps is the maximum that can be transmitted if this is the case? Has anyone done throughtput or delay analysis for UGS,rtPS,nrtPs and Be traffics? It would be of great help. Please do reply. -- View this message in context: http://www.nabble.com/UGS-traffic---WiMAX-Simulation-tf3034313.html#a8431205 Sent from the ns-users mailing list archive at Nabble.com.
