[ns] R: 802.11 a/b/g status
Hi Stephen, the current ns-2 implementation of 802.11 can be considered representative of all b/g/a versions of the protocol. As a matter of fact, only the MAC sub- layer is considered in ns-2. PHY support is scarce in ns-2, and the different b/g/a versions are usually simulated by changing channel parameters, such as the bandwidth and error model. I recently worked on a patch which tries to add some realism to ns-2 channel modeling, available at http://www.reti.polito. it/fiore, but PHY layer modeling is still poor in ns-2. I'm not aware of any group working on such issue. However, people working on ns-3 may be interested in such issue. You could try to post a message to the developers list. Regards, Marco >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 23-set-2006 12.16 AM >A: >Ogg: [ns] 802.11 a/b/g status > > >The research group I am a member of is investigating 802.11 g/n and >802.16 for a wireless project. Our focus is to find a correct >implementation of these protocols or have the ability to provide them >and test them using various scenarios. > >Since we are new to NS-2 we will read the beginner guide to familiarize >ourselves with how to use it. So I will not bug you with beginner >questions right now. > >I looked over the FAQ and the list of supported protocols but I did not >find the status of these protocols. Is it posted in the documentation >and I missed it? Is there a link to someone working on it? > >Stephen >-- >PhD. Student >Auburn University >Department of Computer Science and Software Engineering >107 Dunstan Hall >Auburn, AL 36849-5347 U.S.A. >(334) 844-4330 (O) >[EMAIL PROTECTED] edu > >
[ns] R: How to plot jitter, throughput and end to end delay of a eurane simulation
Hi Diego, you may have a look at trace2stats, at http://www.reti. polito.it/fiore bye, Marco >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 13-ott-2006 10.41 PM >A: <[EMAIL PROTECTED] wmc.nl> >Cc: >Ogg: [ns] How to plot jitter, throughput and end to end delay of a eurane simulation > > >Hi all, > >I am using ns2 with eurane. How to plot jitter,throughput and end to end >delay using xgraph or gnuplot. > >Thanks. > >Diego Passos > > >
[ns] R: RSSI measurement
Loreno, in common/packet-stamp.h you can find the PacketStamp structure, which is included in any ns packet. It stores information on the transmitted and received power. You can access this information with, for example, p->txInfo_.RxPr, which returns the received power of packet p. Note that the original implementation of ns does not include interference: if you want to add this feature, you can install the patch for wireless support you can find at http://www.reti.polito. it/fiore bye, Marco >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 18-ott-2006 12.38 AM >A: <[EMAIL PROTECTED] EDU> >Ogg: [ns] RSSI measurement > > >Hi All, > >does anybody know how do I measure the RSSI between two wireless nodes?? As >far as I have seen in the archive, this question has been posted during >years in this list without any reply. I will be extremelly thankful if >somebody had some hint about it. > >Regards, > >Loreno >
[ns] R: Re: R: RSSI measurement
Loreno, you may want to have a look at the following paper: Naumov et al., "The Study of Inter-Vehicle Ad Hoc Networks on Realistic Vehicular Traces", MOBIHOC 2006. It's about 802.11 and vehicular networks, but it exploits the RSSI information to estimate the distance between nodes. Regards, Marco >Messaggio originale >Da: [EMAIL PROTECTED] com >Data: 18-ott-2006 7.58 PM >A: "Marco Fiore"<[EMAIL PROTECTED]> >Cc: >Ogg: Re: R: [ns] RSSI measurement > >Hi Marco, very thanks to your reply! > >I will take a look at the structure you said and doing some tests. Based in >what you said, probably this solves my problem. A priori I am only >considering simpler scenarios where I do not need to deal with >interferences. My actual concern is only finding a way of estimating the >distance between two bluetooth devices, and I thought RSSI was the >straingforward solution... > >Regards, > >Loreno > >On 10/18/06, Marco Fiore <[EMAIL PROTECTED]> wrote: >> >> Loreno, >> >> in common/packet-stamp.h you can find the PacketStamp >> structure, which is >> included in any ns packet. It stores information on >> the transmitted and received >> power. You can access this information >> with, for example, p->txInfo_.RxPr, >> which returns the received power >> of packet p. Note that the original implementation >> of ns does not >> include interference: if you want to add this feature, you can install >> the patch for wireless support you can find at http://www.reti.polito. >> it/fiore >> >> bye, >> >> Marco >> >> >Messaggio originale >> >Da: >> [EMAIL PROTECTED] >> >Data: 18-ott-2006 12.38 AM >> >A: > EDU> >> >Ogg: [ns] RSSI measurement >> > >> > >> >Hi All, >> > >> >does anybody know how >> do I measure the RSSI between two wireless nodes?? As >> >far as I have >> seen in the archive, this question has been posted during >> >years in >> this list without any reply. I will be extremelly thankful if >> >somebody >> had some hint about it. >> > >> >Regards, >> > >> >Loreno >> > >> >> >> >
[ns] R: Plotting throughput end-to-end delay and jitter
Diego, have a look at trace2stats at http://www.reti.polito.it/fiore. bye, Marco >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 3-nov-2006 12.22 AM >A: >Ogg: [ns] Plotting throughput end-to-end delay and jitter > > >Hi, > >Has anynone a tcl code (or another language) to plot throughput end-to-end >delay and jitter from a Revised format for wireless traces ($ns >use-newtrace) or wireless tracefile. > >Regards, > >Diego Passos > > >
[ns] R: TCP fixed data transfer
Andrea,
if you want to transmit 1 Mbps every 10 mins,
simply use a
recursive function like:
proc sendData {} {
global ns_
puts "time : [$ns_ now]"
$ns at [$ns_ now] "$ftp send 1e6"
$ns_ at [expr [$ns_ now] + 600.0] "sendData"
}
$ns_ at 600.0
"sendData"
which every 600 sec send 1MB and reschedules itself.
$ftp
is the FTP instance attached to TCP.
bye,
Marco
>Messaggio
originale
>Da: [EMAIL PROTECTED]
>Data: 5-nov-2006 6.56 PM
>A: "ns-
users"
>Ogg: [ns] TCP fixed data transfer
>
>
>Hi. I
need to transfer 1MB every 10 minutes on wireless lan with TCP. How
>can I stop tcp after 1MB is sent?
>
>Thx for help and sorry for my
poor english
>Andrea M
>
[ns] R: how to calculate end to end delay in wireless scenario
Hi, have a look at trace2stats, at http://www.reti.polito.it/fiore bye, Marco >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 15-nov-2006 10.38 AM >A: "ns users" >Ogg: [ns] how to calculate end to end delay in wireless scenario > > > > hi all, > > can any one tell me, how to calculate end to end delay in wireless scenario from the trace output or in any other way. > > its urgent please. > > thanks in advance > venkat. > > >- > Find out what India is talking about on - Yahoo! Answers India > Send FREE SMS to your friend's mobile from Yahoo! Messenger Version 8. Get it NOW > > >- > Find out what India is talking about on - Yahoo! Answers India > Send FREE SMS to your friend's mobile from Yahoo! Messenger Version 8. Get it NOW >
[ns] R: wimax and Wifi TxPower default value
Ramzi, you can use the Tcl command Phy/WirelessPhy set Pt_ Look in tcl/lib/ns-default.tcl for default value and other wireless phy parameters. bye, Marco >Messaggio originale >Da: ramzi. [EMAIL PROTECTED] >Data: 22-nov-2006 4.06 PM >A: >Ogg: [ns] wimax and Wifi TxPower default value > > >Hi all, >Could someone tell me what is the default Tx Power for 802.11 ns >implementation and what could be a 802.16 default Tx Power. >How do we set Tx Power values from C++ code and TCL script ? >Best regards, > Ramzi TKA >
[ns] R: Phy/WirelessPhy set Pt_ ?
Hi, "Array" should be "array"... bye, Marco >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 26-nov-2006 5.42 PM >A: >Ogg: [ns] Phy/WirelessPhy set Pt_ ? > > >I am attemped to use the code line [[lindex [$node_ (0) Array get >netif_] 1] set Pt_ 0,5] and you giving the error ?invalid command name >?0,5??. somebody knows to say me why? > >http://decision.csl. uiuc.edu/~kawadia/SOFTWARE/ns2-txpower-describe.txt > > >Thank you! > > >This message was sent using IMP, the Internet Messaging Program. > > >
[ns] R: installazione ns 2.29.3 su Cygwin
Elena, if I understood your problem, you cannot run ns from any location of your file system. If that's right, check that the ns executable, or a link to it is present in any of the folders listed in your PATH. To visualize the list of folders in the PATH, type 'echo $PATH'. If you need further help, remember to provide more information (commands run, error messages received, etc.). bye, Marco > Messaggio originale >Da: [EMAIL PROTECTED] >Data: 5-dic-2006 12.12 PM >A: "mail to NS" >Ogg: [ns] installazione ns 2.29.3 su Cygwin > > > I am trying again to install ns-2.29 on cygwin but after to have given the ./install command and created rows . bash_profile (PATH=. LD_LIBRARY_PATH=.. TCL_PATH=..), logout, unfortunately to the ns command it does not work, it does not appear prompt %. > according to you I have forgotten something? >Elena >
[ns] R: send off packet on different link
Luca, the routing of multiple flows generated by the same source node is determined by: 1. destination node of flow 2. routing algorithm employed In your case, if the two flows are directed to two different nodes, they will probably choose different (not necessarily disjoint) routes. If the flows are directed to the same desitnation they will select the same route, and you'll have to play with routing to avoid that. bye, Marco >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 5-dic-2006 6.29 PM >A: "ns-users" >Ogg: [ns] send off packet on different link > > >Hi, > >if I have a node from that issue themselves different link, is possible to send off the packet on different link in base to the flowid > >Thanks >Regards >Luca > > >-- >Francesco ha perso ben 45 Kg! Scopri come! Clicca qui >http://click.libero. it/webnation05dic06 > > > >
[ns] R: Rate adaptation in ns-2
Hi, if you refer to rate-based congestion control, the first result by searching Google is: "Source code for RAP in ns2" http://netweb.usc. edu/reza/RAP/NewRAP/ If you refer to rate adaptation at MAC layer in wireless networks, by looking at the ns mailing list archives, a patch is available at: http://reti.polito.it/fiore Next time please avoid posting to the mailing list without searching the web and the mailing list archives. bye, Marco >Messaggio originale >Da: emin. [EMAIL PROTECTED] >Data: 12-dic-2006 9.05 PM >A: >Ogg: [ns] Rate adaptation in ns-2 > > >Hi all ns-2 users, > >Is there anyone that implemented rate adaptation over ns-2 before ? We hope >RAP to simulate. And end-to-end (IP) network to simulate with rate >adaptation. > >Need a help as soon as possible... >Thanks in advance. >
[ns] R: disable RTS/CTS mode
Dear ? it's difficult to tell without any information, you should at least post your tcl script and a portion of the tracefile showing RTS/CTS... bye, Marco >Messaggio originale >Da: ns2. [EMAIL PROTECTED] >Data: 14-dic-2006 10.40 AM >A: >Ogg: [ns] disable RTS/CTS mode > > >dear NS users; > >i'm simulating a ad hoc network under ns 2.29. to study some parameters , i'm using OLSR routing protocol and i've disabled RTS/CTS mode using the following command : >Mac/802_11 set RTSThreshold_ 3000.but at the end of my simulation, the trace file shows rows containing info about RTS/CTS packet. > >i would understand why this. > > > > > > > > >___ >Yahoo! Mail réinvente le mail ! Découvrez le nouveau Yahoo! Mail et son interface révolutionnaire. >http://fr.mail.yahoo.com >
[ns] R: obstacle mobility model
Ibrahim, have a look at: Amit Jardosh, Elizabeth M. Belding-Royer, Kevin C. Almeroth, and Subhash Suri. "Towards Realistic Mobility Models for Mobile Ad hoc Networks." In the Proceedings of MOBICOM, San Diego, CA, September 2003. bye, Marco >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 27-feb-2007 2.21 AM >A: <[EMAIL PROTECTED] EDU> >Ogg: [ns] obstacle mobility model > > >Hi ALL >i have simulated (DSR,AODV,DSDV) using Manhattan and Random Waypoint.I want to check the performance of these adhoc protocols in real environment. i looked for added obstacle mobility model for more realistic work. >thanks for any suggestion with regards >ibrahim khider > > >- >Finding fabulous fares is fun. >Let Yahoo! FareChase search your favorite travel sites to find flight and hotel bargains. >
[ns] R: SINR and NS-2 802.11 simulations
Hi, ns-2 physical layer modeling is notoriously weak. A patch solving some of the issues you mentioned is avaialble at http://www.reti.polito. it/fiore bye, Marco >Messaggio originale >Da: [EMAIL PROTECTED] cmu.edu >Data: 8-mar-2007 3.21 AM >A: >Ogg: [ns] SINR and NS-2 802.11 simulations > > >Hi, > >I have a question about NS- 2's 802.11 modeling (or lack there off) of >SINR/SNR. I've been going through wireless-phy.cc and as far as I can >tell,there's no SINR modeling at all. To receive a packet successfully, >the receiving side checks if the received signal power strength is >greater than both CSThreshold and RXThreshold. >There's some mention of a capture threshold where if another packet is >received at the same time, the first packet will be received >successfully if its signal strength is CPThresh* the other signal. >However, I don't see it being implemented any where. >Am I reading this right? Is there no SNR or SINR modeling at all? > >And are there any patches that implement a more accurate physical layer >and are good for MANET simulations? > >Thank you. > >Chun Ming Lee > >
[ns] R: Re: Awk script for Jitter in NS2
For the question on the jitter, you can find the formulae in the read. me. There's no "right" formula, I used to employ the first, which is defined in RTP's RFC. I added the other three upon request of other users, who usually employed them for jitter calculation. Regards, Marco >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 11-mar-2007 11.13 PM >A: >Ogg: Re: [ns] Awk script for Jitter in NS2 > > >Regarding your second question, my understanding is that -Hs is the >node at which the event is observed, and not necessarily the source. >In receive events, -Hs is the node receiving the packet and hence >Hs = Hd (the receiver is the observer of the event) and other >subsequent fields will report the actual source. > > >On Sun, 11 Mar 2007 18:01:43 -0400 >"Shaili Desai" <[EMAIL PROTECTED]> wrote: > >> >> Hello all >> >> I wanted to know if anyone has used trace2stats v0.5b awk scripts for >> wireless formats, and if you can explain me the jitter file in it. I >> mean we have 4 different values of jitter, and the calculations in >> the script dont explain me fully which jitter you would look for >> finding out whats the jitter for that particular communication. >> Can someone please help me for this? >> It would be a great help. >> Also, I had asked this que before, I wanted to know during post >> analysis generally we look at the AGT level right? But in my >> simulations, I am getting AGT in 's' but if that AGT in 's' is for >> lets say Hs-2 to Hd-0 then at receiving I m not getting r with Hs-2 >> and Hd-0, then does it mean ther is a flaw? Also I am getting r with >> Hs and Hd both 0. >> >> Can anyone please help me with this. >> >> Thanks in advance. > >
Re: [ns] Question about wireless testing ?
The output is correct. It's just some control messages ns-2 gives at the beginning and end of simulation. If you see "NS EXITING..." everything went fine and you can find the results in your tracefile :) bye, Marco >Original Message >From: [EMAIL PROTECTED] >Date: Mar 17, 2007 5:31 PM >To: >Subj: [ns] Question about wireless testing ? > > >Hi, >I've a question about NS- 2.30: >When I run some example about wireless (or wireless sensor) like : diffusion (in ns-2.30\tcl\ex or ns-2.30\tcl\ex\diffusion...)...I received the same result like this : > num_nodes is set 3 >warning: Please use -channel as shown in tcl/ex/wireless- mitf.tcl >INITIALIZE THE LIST xListHead > Loading connection pattern... >Loading scenario file... >Starting Simulation... >channel.cc:sendUp - Calc highestAntennaZ_ and distCST_ > highestAntennaZ_ = 1.5, distCST_ = 550.0 >SORTING LISTS ...DONE! >NS EXITING... > I don't know this is right or wrong ?If wrong,can you help me to correct it ...? >Thanks so much...! > > > > >- >Be a PS3 game guru. >Get your game face on with the latest PS3 news and previews at Yahoo! Games. >
[ns] R: help about dataRate_ in Wlan needed!
Hi, I can tell you that once I tried and could send data at 1Gbps over wireless (just as a test) and the transmission rate was set accordingly. Notice that by changing that you only affect the transmission time, but still have all the overhead and contention due to 802.11. bye, Marco >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 20-mar-2007 2.28 PM >A: >Ogg: [ns] help about dataRate_ in Wlan needed! > > >Dear all, > >I change the dataRate_ to 100Mb to check whether the PHY data rate can be seted just by this. >And the node is attached with an UDP agent with CBR traffic. >And the results show that the throughput improved just 0.2Mbps,with the CBR rate 448Kb. >Then I increased the CBR rate to 2Mb,the throughput didn't change. > >So is there anyone who has worked on this can tell me that how to make the IEEE802.11 PHY >data rate supporting high speed. > >In my own opinion,it can be changed by this.Because I think this just affect the receiving time of packet! >Any help would be appreciated! > > > >sincerely, > >wenping zhang >07.03.20
[ns] R: problem in delay and throughput script
Ibrahim,
download the latest version from
http://reti.polito.it/fiore
and follow the read.me for instructions on how to run the scripts.
bye,
Marco
>Messaggio originale
>Da: [EMAIL PROTECTED]
com
>Data: 22-mar-2007 10.19 AM
>A:
>Ogg: [ns]
problem in delay and throughput script
>
>
>Hi all,
> I have worked
for TRACE format .I have used delay.awk,throughput.awk for my tcl
progrm
>It runs successfully for delay but not for thrpughput.
>for
throughput error :
> awk: thrput.awk:44: (FILENAME=hybrid.tr
FNR=122048) fatal: division by zero attempted
>while executing
>
awk -f thrput.awk hybrid.tr > result.tr
>
>for delay
> it runs
successfully.But the problem is that the new file generated (.tr) is
empty.The new file has not any data.
>
> # throughput.awk
> BEGIN
{
> recv = 0
> }
> {
> # Trace line format: normal
> if ($2 != "-t") {
> event = $1
> time = $2
> if (event == "+" || event
== "-") node_id = $3
> if (event == "r" || event ==
"d") node_id = $4
> flow_id = $8
>
pkt_id = $12
> pkt_size = $6
> }
> #
Trace line format: new
> if ($2 == "-t") {
>
event = $1
> time = $3
> node_id = $5
> flow_id = $39
> pkt_id = $41
> pkt_size = $37
> }
> # Calculate
total received packets' size
> if (flow_id == flow && event ==
"r" && node_id == dst) {
> if (flow_t != "sctp") {
> recv += pkt_size - hdr_size
> #printf("recv[%g] = %g %g\n",node_id,pkt_size
> -hdr_size,recv)
> } else {
>
# Rip off SCTP header, whose size depends
> #
on the number of chunks in each packet
>if
(pkt_size != 448 && pkt_size != 864 &&
> pkt_size != 1280) pkt_size =
0
> if (pkt_size == 448) pkt_size = 400
> if (pkt_size == 864) pkt_size = 800
> if (pkt_size == 1280) pkt_size = 1200
> recv += pkt_size
>
#printf("recv[%g] = %g --> tot: %
> g\n",node_id,pkt_size,recv)
> }
> }
> }
> END {
> printf("%10g %10s
%10g\n",flow,flow_t,(recv/simtime)*(8/1000))
> }
>
> #Delay.awk
>BEGIN
{
> for (i in send) {
> send[i] = 0
> }
> for (i in recv) {
> recv[i] = 0
> }
> delay = avg_delay = 0
> }
> {
> # Trace line format:
normal
> if ($2 != "-t") {
> event = $1
> time = $2
> if (event == "+" || event
== "-") node_id = $3
> if (event == "r" || event ==
"d") node_id = $4
> flow_id = $8
>
pkt_id = $12
> }
> # Trace line format: new
>
if ($2 == "-t") {
> event = $1
> time =
$3
> node_id = $5
> flow_id = $39
> pkt_id = $41
> }
> # Store packets
send time
> if (flow_id == flow && node_id == src && send
[pkt_id] == 0 && (event == "+" || event
> =="s")) {
>
send[pkt_id] = time
> }
> # Store packets
arrival time
> if (flow_id == flow && node_id == dst && event
== "r") {
> recv[pkt_id] = time
>}
> }
> END {
> # Compute average delay
> for (i in recv) {
> if (send[i] == 0) {
> printf
("\nError %g\n",i)
> }
> delay += recv
[i] - send[i]
> num ++
> }
> printf("%
10g ",flow)
> if (num != 0) {
> avg_delay =
delay / num
> } else {
> avg_delay = 0
> }
> printf("%10g\n",avg_delay*1000)
>}
>
> thanks
>
> ibrahim
>
>
>-
>Don't be
flakey. Get Yahoo! Mail for Mobile and
>always stay connected to
friends.
>
[ns] R: analyse trace files
Hi Stephan, have a look at tracegraph or trace2stats. bye, Marco >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 6-apr- 2007 7.37 AM >A: >Ogg: [ns] analyse trace files > > >Hello again! >Think my last Mail was lost :-( >I'm using ns-2.29 and do some wireless simulations. >Now i'm looking for some scripts to analyse the .tr Files. Need some >scripts that give me throughput, Number of lost/received packets and so >on. >Thanks in advance >Stephan > > > > >
[ns] R: why RTP header in UDP's sendmsg() ?
Hi Timo, my guess is that those infos can be useful for statistics collection. Is the RTP header considered in the UDP header size? If not, it is an "invisible" header, put there just for informational purposes and not affecting the simulation outcome. bye, Marco > Messaggio originale >Da: [EMAIL PROTECTED] >Data: 4-apr- 2007 4.37 PM >A: >Ogg: [ns] why RTP header in UDP's sendmsg() ? > > >Hiya, > >I'm not sure if this issue rather belongs to the dev-mailinglist instead >of the users' one but since it's just a question and not some sort of >contribution I'll try here first: > >I've looked at the UDP code (in apps/udp.cc) and came to realize that >everytime the sendmsg() function is called a RTP header is put on top of >the packet, including (talk burst) flags, sequence number, and a time >stamp. > >Just wondering: What's the rationale behind this? > > >Cheers, > >--Timo > >
[ns] R: how can I graphically show ad hoc mobile nodes using nam?
Ciao, other than nam, you can try with Huginn: http://www.informatik. uni-mannheim.de/pi4.data/content/projects/huginn/ or iNSpect: http: //toilers.mines.edu/Public/NsInspect bye, Marco >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 6-apr-2007 7.12 PM >A: "ns- users" >Ogg: [ns] how can I graphically show ad hoc mobile nodes using nam? > > >Hi All, >I am new in NS world. I am running same tlc sample scripts and showing nodes and links using nam. >Can anybody tell me, after having defined a topology of a mobile ad hoc network and having defined the node movement, how can I graphically show the network topology. >Is it possible to see the node movement and the trasmission range? >Thanks in advance for any reply, >Seba > > >-- >Leggi GRATIS le tue mail con il telefonino i-mode di Wind >http://i-mode.wind.it/ > > > >
[ns] R: analyse trace file- packet delay
Hi, you can use Perl/awk to parse the tracefile, or have a look at tracegraph or trace2stats (google for them). Also, you find a ton of mails on the topic in the mailing list archives... bye, Marco > Messaggio originale >Da: [EMAIL PROTECTED] >Data: 6-apr-2007 6.18 PM >A: >Ogg: [ns] analyse trace file- packet delay > > >Hello, > >I am new to NS2. > >I want to find packet delay from node 2 to node 3. Topology is like > >2- 0--1---3 > >0-1 is a bottleneck link > >I got the output trace file of format (sample) > >r 4.030256 10 1 ack 40 --- 5 10.0 5.0 74 579 >+ 4.030256 1 0 ack 40 --- 5 10.0 5.0 74 579 >- 4.030256 1 0 ack 40 --- 5 10.0 5.0 74 579 >r 4.031008 4 0 tcp 1040 --- 4 4.0 9.0 69 578 >+ 4.031008 0 1 tcp 1040 --- 4 4.0 9.0 69 578 >- 4.031008 0 1 tcp 1040 --- 4 4.0 9.0 69 578 >r 4.031824 0 4 ack 40 --- 4 9.0 4.0 66 560 >+ 4.031824 4 0 tcp 1040 --- 4 4.0 9.0 77 593 >- 4.031824 4 0 tcp 1040 --- 4 4.0 9.0 77 593 >r 4.031872 1 11 tcp 1040 --- 6 6.0 11.0 41 552 > >now I have to find minimum/maximum/average Packet delay from node 2 to node3? >Please tell me the idea. > >Thanks >Rinky > > >
[ns] R: Help in simulating Bianchi's results
Hi Riz, >1. I am not sure about how to generate a scenario where all the >nodes are contending as in my case of 10 nodes only 0 2 4 6 8 are >contending and the other 1 3 5 7 9 are the sink or them so how can I >come with a scenario where all nodes are coteding as in Bianchi's paper attach one traffic source and one traffic sink to each node. >2. whether cbr interval 0.005 can meet the saturation requirement you are in saturation conditions when each node generates more traffic than it can send. Broadly, it depends on the bandwidth you are using and one the number of contending nodes, but you can choose a very high value, so that even a single source would saturate the channel (e.g. if you are using 11Mbps as MAC datarate, you can set the CBR rate to 11Mbps, and you're sure your nodes are backlogged). >3. I cannot see any RTS and CTS in the trace file why? because they are off. RTSthreshold_ controls the RTS/CTS (frames smaller than this value go without RTS/CTS, frames bigger require RTS/CTS, defualt is 3000 - i.e. never use it), so the try adding the line $val(mac) set RTSthreshold_ 0 bye, Marco >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 11-apr-2007 10.27 AM >A: "isi"<[EMAIL PROTECTED]> >Ogg: [ns] Help in simulating Bianchi's results > > >Hi, > >I am new to Ns and am trying to simulate the results for the paper: > >G. Bianchi, "Performance Analysis of the IEEE 802.11 Distributed >Coordination Function,"IEEE JSAC, vol. 18, no. 3, March 2000 > >My script is given below when I am running it with DumbAgent as the >routing protocol I don't see any activity in the trace file and the >throughput is zero but with a routing protocol I can get some throughput >and I understand why this is happening but I don't get why my script >with dumbagent is not working. I am using the parameters from Bainchi's >paper > >I have a few questions: > >1. I am not sure about how to generate a scenario where all the >nodes are contending as in my case of 10 nodes only 0 2 4 6 8 are >contending and the other 1 3 5 7 9 are the sink or them so how can I >come with a scenario where all nodes are coteding as in Bianchi's paper >2. whether cbr interval 0.005 can meet the saturation requirement >3. I cannot see any RTS and CTS in the trace file why? > > ># Script to reproduce the results of Bianchi's paper ># == ># Define options ># == >set val(chan) Channel/WirelessChannel;# channel type >set val(prop)Propagation/FreeSpace ;# radio- propagation >model >set val(netif) Phy/WirelessPhy;# network >interface type >set val (mac)Mac/802_11 ;# MAC type >set val (ifq) Queue/DropTail/PriQueue;# interface queue >type >set val(ll)LL ;# link layer type >set val(ant) Antenna/OmniAntenna;# antenna model >set val(ifqlen) 50 ;# max packet in ifq >set val(nn) 10 ;# default number >of mobilenodes >set val(rp) DumbAgent ;# routing protocol >DumbAgent >set val (x) 100.0 ; >set val (y) 100.0 ; >set val (simtime) 30.0; #sim time 600 > ># == ># Main Program ># == >set ns_ [new Simulator] >set tracefd [open bianchi.tr w] >$ns_ trace-all $tracefd > >set namtrace [open bianchi.nam w] ;# for nam tracing >$ns_ namtrace-all-wireless $namtrace $val(x) $val(y) >#$ns_ use-newtrace > ># ># set up topography object ># > >set topo [new Topography] >$topo load_flatgrid $val(x) $val (y) > ># ># Create God ># > >set god_ [ create-god $val(nn) ] > ># Parameters for 802.11 >$val(mac) set SlotTime_ 0.50 >$val(mac) set SIFS_ 0.28 >$val(mac) set PreambleLength_ 0 >$val(mac) set PLCPHeaderLength_ 128 >$val(mac) set PLCPDataRate_ 1.0e6 >$val(mac) set DIFS_ 0.000128 >$val(mac) set dataRate_ 1.0e6 >$val(mac) set basicRate_ 1.0e6 >$val(mac) set CWMin_ 31 >$val(mac) set CWMax_ 255 >#$val(mac) set RTShreshold_ 3000 > >set chan_1_ [new $val(chan)] > >set rng [new RNG] >$rng seed 1 >set rand1 [new RandomVariable/Uniform] >$rand1 use-rng $rng >$rand1 set min_ -50.0 >$rand1 set max_ 50.0 > ># ># Create the specified number of nodes ># configure node > > >$ns_ node- config -adhocRouting $val(rp) \ > - llType $val(ll) \ > -macType $val (mac) \ >
[ns] R: Simulation with real payload
Anand, there's a traffictrace agent somewhere in the ns distribution. Look for traffictrace.cc/h in the source tree to get the actual Tcl class name. Marco >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 12-apr-2007 3.54 AM >A: <[EMAIL PROTECTED]> >Ogg: [ns] Simulation with real payload > > >Hi, > >Can anyone please tell me if it is possible with NS2 to give an input file as >real payload for the simulation traffic like video files? > >Thanks, >Anand > >
[ns] R: Scheduler error in 802.11
Bahman, ususally the "Event UID not valid!" error means that an event in the event list has a time that is lower than the current time, or that the handler (the timer in your case) was deleted before the event was extracted from the list. So I suggest you to look for strange behaviors of your code, which may cause the event to be scheduled with a negative time. hope this helps, Marco >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 4-mag-2007 5.30 PM >A: >Ogg: [ns] Scheduler error in 802.11 > > >Hi, > >I'm simulating a simple wireless (802.11b Basic Mode) experiment. At the >end of the >simulation, I get this error: > > "Scheduler: Event UID not valid!" > >I understand that the message is being initiated from >/ns/common/scheduler.cc file line 93 only because the UID of an event is >positive. In other words, an event with positive UID cannot be scheduled >again. > >Now, I'm using a timer to introduce a fixed delay for each packet -either >control or data packet- passing through the interface layer. When I >introduce 1 to 39us of delay to my system, the simulation works perfectly >and as expected (i.e. there is a fixed delay for the transmission of each >packet reflected into my trace file). However, when I increase this delay >to 40us and above, then run the simulation I get the above error. I have >adjusted the timeouts in the ns/mac/mac-802_11.cc as well so that my packets >are not all dropped. > >Please let me know if you have any ideas or thoughts about this. Where do >you think I should look at first? What could the problem be? > >Thanks, > >Bahman > >_ >Txt a lot? Get Messenger FREE on your mobile. >https://livemessenger. mobile.uk.msn.com/ > >
[ns] R: Re: About random mobility of wireless nodes
Hi, it happened to me to use nam to visualize nodes movement, and I had no problems in doing that. These are the settings I used: set file (nam) [open "out.nam" w] $ns_ namtrace-all $file(nam) $ns_ namtrace-all- wireless $file(nam) $opt(x) $opt(y) $ns_ nam-end-wireless $opt(stop) Hope it helps. bye, Marco >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 27-set-2007 3.13 PM >A: >Ogg: Re: [ns] About random mobility of wireless nodes > > >HI Gabrial, > >I am not sure if nam is the perfect way to look at your wireless >scenario. As far as I know, nam is not really supporting motion... > >Also, do you have the following line in you node-config? > >$ns_ node- config -movementTrace ON > >Hope that helps. > >Claus > >Gabrial Monty wrote: >> Hi all, >> >> I am trying to simulate the an ad hoc network using the random mobility model for the wireless nodes. I have enabled the random motion as follows: >> >> $node_($i) random- motion 1 >> $node_($i) start >> >> It works and give me results (eagrding the aggregate throughput) but the mobility of nodes and the generated traffic are not captured or recorded in the nam trace, where the nodes are appear static and no traffic is shown. I have added the following line: >> >> $node_($i) namattach $namtrace >> >> >> but nothing change, How can I make nam display the exact scenario with the mobility of nodes? >> >> thanx in advance for your help. >> >> >> - >> Take the Internet to Go: Yahoo!Go puts the Internet in your pocket: mail, news, photos & more. > >-- >Claus Christmann >Graduate Research Assistant > >Georgia Institute of Technology >270 Ferst Drive >Atlanta, GA 30332- 0150 > >http://uav.ae.gatech.edu > >
[ns] R: R: Re: About random mobility of wireless nodes
Hi, I never used the "built-in" random mobility, but movement traces generated outside ns-2. You could have a look at tools like iNSpect and Huginn to visualize nodes movement from ns-2 traces. bye, Marco >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 29-set- 2007 8.53 AM >A: "ns-users" >Cc: "Marco Fiore" <[EMAIL PROTECTED]> >Ogg: [ns] R: Re: About random mobility of wireless nodes > >Hi, > > This method works and it is fine, however in my case when I set the random mobility to 1 for the wireless nodes nothing is displayed in nam. Although when I log the nodes movements the trace file show me that the nodes locations is changing with time, but I cannot see that on nam for this case only. > > Regards, > > Gaby > > > == > Marco Fiore <[EMAIL PROTECTED]> wrote: > > Hi, > >it happened to me to use nam to visualize nodes movement, >and I >had no problems in doing that. These are the settings >I used: > >set file >(nam) [open "out. nam" w] >$ns_ namtrace-all $file(nam) >$ns_ namtrace-all- >wireless $file(nam) $opt(x) $opt(y) >$ns_ nam-end-wireless $opt(stop) > >Hope it helps. > >bye, > >Marco > > >>Messaggio originale >>Da: >[EMAIL PROTECTED] >>Data: 27-set-2007 3.13 PM >>A: >>Ogg: >Re: [ns] About random mobility of wireless nodes >> >> >>HI Gabrial, >> >>I >am not sure if nam is the perfect way to look at your wireless >>scenario. As far as I know, nam is not really supporting motion... >> >>Also, do you have the following line in you node-config? >> >>$ns_ node- >config -movementTrace ON >> >>Hope that helps. >> >>Claus >> >>Gabrial Monty >wrote: >>> Hi all, >>> >>> I am trying to simulate the an ad hoc >network using the random mobility model for the wireless nodes. I have >enabled the random motion as follows: >>> >>> $node_($i) random- >motion 1 >>> $node_($i) start >>> >>> It works and give me results >(eagrding the aggregate throughput) but the mobility of nodes and the >generated traffic are not captured or recorded in the nam trace, where >the nodes are appear static and no traffic is shown. I have added the >following line: >>> >>> $node_($i) namattach $namtrace >>> >>> >>> but nothing change, How can I make nam display the exact scenario >with the mobility of nodes? >>> >>> thanx in advance for your >help. >>> >>> >>> - >>> Take the >Internet to Go: Yahoo!Go puts the Internet in your pocket: mail, news, >photos & more. >> >>-- >>Claus Christmann >>Graduate Research Assistant >> >>Georgia Institute of Technology >>270 Ferst Drive >>Atlanta, GA 30332- >0150 >> >>http://uav.ae.gatech. edu >> >> > > > > >- >Boardwalk for $500? In 2007? Ha! >Play Monopoly Here and Now (it's updated for today's economy) at Yahoo! Games.
[ns] R: Re: "Ask Google" is not a polished answer, isn't it?
Dear Sidney and Hagen, actually there's a way to include "real" application-level data in an ns-2 packet. The manual has one section on this: http://www.isi.edu/nsnam/ns/doc/node516.html Basically, it's all about defining an Application Data Unit (ADU) containing all the desired data, to be attached to the basic packet. bye, Marco
[ns] R: throughput of 802.11b
You might find the following link interesting: http://www.ece.rice. edu/~jpr/ns/docs/ns-802_11b.html bye, Marco >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 11-mag-2008 10.46 AM >A: >Ogg: [ns] throughput of 802.11b > > >Hi all, >I have tried to run 802.11b in ns2, and I use the following setting: > Mac/802_11 setSlotTime_0.20;# 20us > Mac/802_11 setSIFS_0.10;# 10us > Mac/802_11 setPreambleLength_ 144 ;# 144 bits > Mac/802_11 setPLCPHeaderLength_48 ;# 48 bits > Mac/802_11 setPLCPDataRate_1.0e6 ;# 1 Mbps > Mac/802_11 setdataRate_11.0e6 ;# 11 Mbps > Mac/802_11 setbasicRate_ 1.0e6 ;# 1 Mbps > >However, it turns out that the actually achieved throughput of a tcp connection and a cbr connection is around 1.34Mbps and 3Mbps respectively, can anyone tell me why? > >Thanks in advance! > >
[ns] Loading a large movement trace file
Hi all, I am experienceing the following problem: I have a large movement trace file (around 200 nodes whose speed is updated every 0.5s for 2000s of simulation), which is 40Mb in size (evry line of the file is a setdest command). When I run the simulation, it takes a very long time (I do not know how much, I stopped it after 30 mins) after the "INITIALIZE THE LISTHEAD xListHead" message is displayed and before the actual start of simulation (i.e. simulatied time 0 is not reached). I think this is due to the large movement trace file, but I am not sure, and I do not know what to do to avoid that. Does anyone have any idea about how to get rid of such a problem, or any experience with similar issues? Thanks, Marco Fiore
[ns] R: Delay anomaly
Teena, please provide more details when posting to the mailing list. Information about the topology and traffic sources are needed in order to help you. Regards, Marco Fiore Messaggio originale Da: [EMAIL PROTECTED] Data: 5-gen-2006 6.48 AM A: Ogg: [ns] Delay anomaly Hello all, I was trying to find out the delay distribution (MAC layer).I am doing the experiment for different data rates.The delay with 200kbps datarate is found to be more than that with 400kbps.ie. When u repeat the same experiment,the delay is concentrated on a higher value for 200kbps. What can be the problem? Is there any explanation for that? Thanks in advance. Teena.
[ns] R: TCP for wirelessTcp for
Mime-Version: 1.0 Content-Type: text/plain;charset="UTF-8" Content-Transfer-Encoding: 7bit X-Originating-IP: 130.192.3.16 Dario, TCP (in all of its versions) has well known flaws when employed in wireless environment, which is usually characterized by high error rates. This is due to the way TCP reacts to packet losses, which it assumes due to congestion and not medium unreliability. Thus, there is no particolar version of TCP which is more suitable for wireless networks, unless you - consider some ad-hoc modifications which have been proposed by several researchers, but which are not standard and probably not implemented in ns-2. - use an error free channel, which is not realistic, but makes TCP works a lot better. Regards, Marco Fiore Messaggio originale Da: [EMAIL PROTECTED] Data: 15-gen-2006 3.48 PM A: Ogg: [ns] Tcp for wireless simulation Hi, can someone suggest me which Agent Tcp is the more suitable for wireless simulation? Thanks.
[ns] R: 802.11 simulating
The number of transmissions is not sufficient to determine the cause of such a high number of collisions. Several other parameters are necessary: simulation time, transmission range of nodes, use of RTS/CTS, 802.11 CWND min and max sizes, etc. Regards, Marco Fiore Messaggio originale Da: [EMAIL PROTECTED] Data: 19-gen-2006 4.25 PM A: Ogg: [ns] 802.11 simulating Hi all! I´m simulating a sensor network, with 100 nodes in a 1000x1000 scenario, but I´ve a terrible number of collisions: 47935 in 19905 messages sent... The packet is 52 byte long. I use the 802.11 with ns2.28 Someone have some tricks? Or someone can help me to understand the reason? Maybe I have to configure better some parameters? Many thanks!!
Re: [ns] 802.11g - doubt in ns-2.29
Tamara, what do you mean by "did not work"? Did you get error messages, or unexpected results? Regards, Marco Fiore Original Message From: [EMAIL PROTECTED] Date: Jan 23, 2006 2:36 AM To: Subj: [ns] 802.11g - doubt in ns-2.29 Hi all! * I'm doing a kind of project in ns-2.29 wired cum wireless with 802.11g. Everything is working fine, but i couldn't make it work with a datarate of 54mb and a cbr of 54mb. Do you have any idea what is happening? May I change something in C++ code to make it work? Or just configure some parameters in tcl code? I would be really glad if you help me. there are some things that i tried, but didn't work out.* Mac/802_11 *set* CWMin15 Mac/802_11 *set* CWMax 1023 Mac/802_11 *set* SlotTime_0.09 Mac/802_11 *set* CCATime_ 0.03 Mac/802_11 *set* RxTxTurnaroundTime_ 0.02 Mac/802_11 *set* SIFS_0.16 Mac/802_11 *set* PreambleLength_ 96 Mac/802_11 *set* PLCPHeaderLength_ 40 Mac/802_11 *set* PLCPDataRate_6.0e6 *#define DSSS_MaxPropagationDelay0.005 // 0.5us* *this is the topology of my network * *# w(0) w(1) * *# \ | * *# \ | * *# \ | * *# \ | * *# \ | * *# \| * *#w(2)* *# |* *# |* *# BS* *#/|* *# / | * *# / | * *# / | * *#/ | * *# / | * *# n(0) n(1) * *#* *# w(i): Wired nodes* *# BS: base station* *# n(i): Wireless nodes Thank's in advance Tamara Rosini *
[ns] R: Re: 802.11g - doubt in ns-2.29
Tamara, it seems strange to me that changing only datarate and 802.11 parameters can cause the simulation to stop. Does your code works with standard 802.11 configuration? Did you change anything else? Regards, Marco Fiore Messaggio originale Da: [EMAIL PROTECTED] Data: 23-gen-2006 12.16 PM A: "Marco Fiore"<[EMAIL PROTECTED]> Cc: Ogg: Re: [ns] 802.11g - doubt in ns-2.29 Hi, Actually i had two problems, at first appeared this message "Scheduler:: Event UID not valid!", I found an answer about this error in this website http://web.syr.edu/~dchen02/FAQ.txt <http://web.syr.edu/%7Edchen02/FAQ. txt>and the tcl configuration for 802.11g. Later the changes in tcl code my computer just stopped ( I had close the shell) , i tried to process the code in another machine but the same result was seen. ps: my cbr protocol is UDP Thank's in advance Tamara Rosini 2006/1/23, Marco Fiore <[EMAIL PROTECTED]>: > > Tamara, > > what do you mean by "did not work"? > Did you get error > messages, or unexpected > results? > > Regards, > > Marco Fiore > > > Original > Message > From: [EMAIL PROTECTED] > Date: Jan 23, 2006 2:36 AM > To: > > Subj: [ns] 802.11g - doubt in ns-2.29 > > > Hi all! > > * > > I'm doing a kind of project in ns-2.29 wired cum wireless with 802.11g. > Everything is working fine, but i couldn't make it work with a datarate > of > 54mb and a cbr of 54mb. Do you have any idea what is happening? May > I change > something in C++ code to make it work? Or just configure some > parameters in > tcl code? > I would be really glad if you help me. > > there > are some things that i tried, but didn't work out.* > > Mac/802_11 *set* > CWMin15 > Mac/802_11 *set* CWMax > 1023 > Mac/802_11 *set* SlotTime_0.09 > Mac/802_11 > *set* CCATime_ 0.03 > Mac/802_11 *set* > RxTxTurnaroundTime_ 0.02 > Mac/802_11 *set* > SIFS_0.16 > Mac/802_11 *set* > PreambleLength_ 96 > Mac/802_11 *set* PLCPHeaderLength_ > 40 > Mac/802_11 *set* PLCPDataRate_6.0e6 > *#define > DSSS_MaxPropagationDelay0.005 // 0.5us* > > *this is the > topology of my network * > *# w(0) w(1) * > *# \ | * > *# > \ | * > *# \ | * > *# \ | * > *# \ | * > *# > \| * > *#w(2)* > *# |* > *# |* > *# BS* > *#/|* > *# / | * > *# / | * > *# / | * > *#/ > | * > *# / | * > *# n(0) n(1) * > *#* > *# w(i): Wired nodes* > *# BS: > base station* > *# n(i): Wireless nodes > > Thank's in advance > Tamara Rosini > * > > > >
[ns] R: lower RTS/CTS saturation throughput
Michael, it may be that increasing the data rate to 5,5 or 11 Mbps the number of collisions is reduced a lot. As a consequence, the RTS/CTS mechanism only introduces overhead. This depend on the offered load (i. e. how much traffic is present) in the network. Regards, Marco Fiore Messaggio originale Da: [EMAIL PROTECTED] Data: 30-gen-2006 11.55 AM A: Ogg: [ns] lower RTS/CTS saturation throughput Hello ns users, I have a question regarding saturation throughput in a wireless lan. I am examining both basic access and rts/cts mechanisms and measure the saturation throughput as the number of nodes participating in the network increases. I noticed that for 1Mbps channel rate the rts/cts access scheme gives better throughput results compared with the basic access scheme.I think that this behavior is expected as the rts/cts mechanism reduces the number of collisions. However when I assume 5.5Mbps and 11 Mbps channel rate the throughput results that I am getting from the ns-2 simulation are a lot lower than the corresponding ones from the basic access scheme( for 5.5Mbps and 11 Mbps ) Is this behavior normal? To change the channel data rate I have put in my tcl script: Mac/802_11 set dataRate_ 11.0e6 ;# 11Mbps or 5,5 Mbps Mac/802_11 set basicRate_ 1.0e6 ;# 1 Mbps Is the basicRate correct? Has anyone else experienced something similar? I am waiting for your opinions, Thank you for your attention, Regards, Michael - Χρησιμοποιείτε Yahoo! Βαρεθήκατε τα ενοχλητικά μηνύ ματα (spam); Το Yahoo! Mail διαθέτει την καλύτερη δυνατή προστασία κατά των ενοχλητικών μηνυμάτων http://login.yahoo. com/config/mail?.intl=gr
[ns] R: HELP - I am stuck on MAC queue length
This happens because the 'target_' attribute is a NsObject (superclass of many ns-2 classes), to guarantee maximum code flexibility. You should: 1. cast the 'target_' to the desired class, e.g. targetActualClass *targetPointer = (targetActualClass *) this- >target_; 2. access 'target_' downtarget_ attribute. I am not sure you can do this directly, since 'downtarget_' is probably a protected mamber. Thus, you should code an accessor function (if not present) or define the aodv class as a friend of the 'target_' class. Regards, Marco Fiore Messaggio originale Da: [EMAIL PROTECTED] Data: 30-gen-2006 5.52 PM A: Ogg: [ns] HELP - I am stuck on MAC queue length Dear ns2 users, I really need your help. I'm completely stuck on the following: I need to access the IFq length from my Routing Agent. Since the routing I adopted is the AODV one, I have no more layers (e.g. IMEP) to consider. So, FROM THE AODV.CC code, according to the structure of the mobile node as depicted in the ns2 manual, I should achieve my target by inserting the following line... Given this the pointer to the aodv agent, int queued_packets = this->target_->downtarget_->length(). Well, it doesn't work. The compilation doesn't give positive results and the error it gives is the following: aodv/aodv.cc:1033: error: 'class NsObject' has no member named 'downtarget_' ?? Any replay with suggestion is really welcome. Thank you in advance. I hope you can help me. _ Charla con tus amigos en línea mediante MSN Messenger: http: //messenger.latam.msn.com/
[ns] R: Re: R: lower RTS/CTS saturation throughput
Zubair, this is what I meant when considering the offered load. However, I am not completely sure about the TCP behavior you described, since the random backoff of 802.11 should prevent one station (even with a lot more traffic to send) from having higher access than others. If all stations behave identically, having FTP/TCP or CBR/UDP saturating traffic should not change things much. Of course, things could change in presence of high channel error rates, which are known to lead to TCP low performance. Regards, Marco Fiore Messaggio originale Da: [EMAIL PROTECTED] Data: 31-gen-2006 3.29 AM A: "Marco Fiore"<[EMAIL PROTECTED]> Cc: <[EMAIL PROTECTED]>, Ogg: Re: [ns] R: lower RTS/CTS saturation throughput Marco, Won't the traffic type also be of significance in such a case. While CBR/UDP will be constantly sending packets at a fixed rate, FTP/TCP will be aggressively trying to send in as many packets as possible for every round trip time. As you said, the offered load is thus certainly a factor. If TCP is used, then we observe that fairness becomes an issue as a particular flow almost captures the whole channel - specially if there are exposed nodes in the network. This flow does not allow the net throughput of the network to increase. With the RTS- CTS turned on, the exposed node continually senses the neighboring node to be sending Data packets and more often than not is not able to transmit its own RTS/CTS pkt. In such a scenario the basic access scheme does give a greater throughput. Your point of RTS-CTS packets generating extra overhead is also certainly very relevant in this scenario. Zubair On Mon, 30 Jan 2006 Marco Fiore wrote : > >Michael, > >it may be that increasing the data rate to 5,5 or 11 Mbps >the >number of collisions is reduced a lot. As a consequence, >the RTS/CTS >mechanism only introduces overhead. >This depend on the offered load (i. >e. how much traffic >is present) in the network. > >Regards, > >Marco Fiore > >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 30-gen-2006 >11.55 AM >A: >Ogg: [ns] lower RTS/CTS saturation >throughput > > > Hello ns users, > I have a question regarding >saturation throughput in a wireless lan. > I am examining both >basic access and rts/cts mechanisms and measure the > saturation >throughput as the number of nodes participating in the network >increases. > > I noticed that for 1Mbps channel rate the >rts/cts access scheme gives better throughput results compared with >the basic access scheme.I think that this behavior is expected as the >rts/cts mechanism reduces the number of collisions. > However when >I assume 5.5Mbps and 11 Mbps channel rate the throughput results that >I am getting from the ns-2 simulation are a lot lower than the >corresponding ones from the basic access scheme( for 5.5Mbps and 11 >Mbps ) > Is this behavior normal? >To change the channel >data rate I have put in my tcl script: >Mac/802_11 set >dataRate_ 11.0e6 ;# 11Mbps or 5,5 Mbps > Mac/802_11 set >basicRate_ 1.0e6 ;# 1 Mbps >Is the basicRate correct? >Has anyone else experienced something similar? > I am >waiting for your opinions, > Thank you for your attention, > Regards, >Michael > > > >- > ΧÏηÏιμοÏοιείÏε Yahoo! > ÎαÏεθήκαÏε Ïα >ενοÏληÏικά Î¼Î·Î½Ï Î¼Î±Ïα (spam); Το Yahoo! Mail διαθÎÏει Ïην καλÏÏεÏη >Î´Ï Î½Î±Ïή ÏÏοÏÏÎ±Ï Î¯Î± καÏά ÏÏν ενοÏληÏικÏν Î¼Î·Î½Ï Î¼Î¬ÏÏν > http: //login.yahoo. >com/config/mail?.intl=gr > > Mohammad Zubair Ahmad PhD Student, Computer Engineering University of Central Florida, Orlando, FL 32826
[ns] R: help with trace file
Sita, have a look to the ns-manual, and you'll find all infos on tracefiles format. Regards, Marco Fiore >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 3-feb-2006 4.45 AM >A: "ns list" >Ogg: [ns] help with trace file > > >Hello, >I am trying to collect some data from the ns-2 trace file to tabulate >results. I am using the new wireless trace format. I have agent, router >and mac trace set to ON in my tcl file. I am using AODV as my routing >protocol. >However, I do not see any MAC address information or packet ID or unique >ID that I can use to calculate throughput, delay etc. Sample trace is as >follows: > >s -t 46.0 -Hs 50 -Hd -2 -Ni 50 - Nx 0.00 -Ny 50.00 -Nz 0.00 -Ne >198.231428 -Nl AGT -Nw --- [0.00 0 0] - Is 50.0 -Id 51.0 -It tcp -Il 40 >-If 2 -Ii 1 -Iv 32 -Pn tcp -Ps 0 -Pa 0 -Pf 0 -Po 0 >r -t 46.0 -Hs 50 -Hd -2 -Ni 50 -Nx 0.00 -Ny 50.00 - Nz 0.00 -Ne >198.231428 -Nl RTR -Nw --- [0.00 0 0] -Is 50.0 -Id 51.0 - It tcp -Il 40 >-If 2 -Ii 1 -Iv 32 -Pn tcp -Ps 0 -Pa 0 -Pf 0 -Po 0 >s -t 46.0 -Hs 50 -Hd -2 -Ni 50 -Nx 0.00 -Ny 50.00 -Nz 0.00 -Ne >198. 231428 -Nl RTR -Nw --- [0.00 0 0] -Is 50.255 -Id -1.255 -It AODV -Il >48 -If 0 -Ii 0 -Iv 30 -P aodv -Pt 0x2 -Ph 1 -Pb 3 -Pd 51 -Pds 0 -Ps 50 >-Pss 8 -Pc REQUEST >s -t 46.04532 -Hs 7 -Hd -2 -Ni 7 -Nx 1.00 -Ny 100.00 -Nz 0.00 -Ne >198.137611 -Nl MAC -Nw --- [0.12 7 50] > >Any help appreciated. >Thanks, >Sita > >
[ns] R: Can we get rid of TCP in wireless?
> It seems that all the wireless network simulation examples in ns tutorials >adopt such a format: "app->TCP/UDP->routing->MAC->PHY". However, there >is no transport protocol in real wireless implementations. Is it possible >to get rid of TCP/UDP and connect application directly to the routing? Actually, a transport protocol *is* present in real wireless implementations. Moreover that protocol is often TCP, without which you could not perform any task requiring reliable data transfer (e.g. internet browsing, file sharing). Maybe you mean that in your simulation you do not need reliability at transport layer: in that case it is sufficient to use the UDP protocol... you can do that simply changing the level 4 protocol from TCP to UDP... Regards, Marco Fiore
[ns] R: MAC protocol
>I'd like also to check, and maybe to change the size of the >contention window in 802_11, >but I can't find it. Check tcl/lib/ns- default.tcl, where all the default values for tcl-configurable parameters are listed. You can find there the default settings for CWmin and CWmax, and you can override them in your tcl script using the same commands. Regards, Marco Fiore
[ns] R: IP_BROADCAST problem
Dan,
which command did you use to send the message to the IP layer?
An
through which transport level protocol?
Marco Fiore
>Messaggio
originale
>Da: [EMAIL PROTECTED]
>Data: 6-feb-2006 7.27 PM
>A:
>Ogg: [ns] IP_BROADCAST problem
>
>
>Hello,
>
>I am
trying to implement some route-discovery mechanism in ns2, at the
>application layer. This requires me to send some broadcast packets. I
set
>the IP destination address to IP_BROADCAST and I get the following
error:
>
>__
>
>--- Classfier::no-slot{} default handler (tcl/lib/ns-lib.tcl) ---
>
> _o15: no target for slot -1
>
> _o15 type: Classifier/Hash/Dest
content dump:
>
> classifier _o15
>
> 0 offset
>
> 0 shift
>
>
2147483647 mask
>
> 1 slots
>
> slot 1: _o106 (Classifier/Port)
>
> -1
default
>
> -- Finished standard no-slot{} default handler
--
>
>
>
>
>
>Is there something I am missing? Thank you for your help,
>
>Dan
>
>
[ns] R: large-scale p2p simulation
I really doubt that *any* existing network simulator could be a good one if you need to simulate millions nodes... that's why analytical approaches to the p2p evaluation problem are so popular. Regards, Marco Fiore >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 9-feb-2006 12.41 AM >A: >Ogg: [ns] large- scale p2p simulation > > >Hi, > >I need to simulate and study applications performance over large-scale (e.g. million nodes) p2p networks (e.g. chord ). Could any NS2 expert please provides some suggestions on whether NS2 is a good simulator for this purpose? I mainly concern about NS2 scalability. > >Thanks in advance! > >G. >
[ns] R: User data over UDP
Application Data Units (ADUs) containing real data can be used in ns-2. You can look for the "AppData" class structure and functioning in the ns-maunal (see chapter 37 'eb cache as an application' for an example). Regards, Marco Fiore >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 9-feb-2006 7.16 AM >A: >Ogg: [ns] User data over UDP > > >Dear all, > >I need to transmit user- defined packet over UDP. > >If any body has a template-code that I can use that would really help. > >Please help if you can. > >Thanks > >_ >FREE pop-up blocking with the new MSN Toolbar - get it now! >http: //toolbar.msn.click-url.com/go/onm00200415ave/direct/01/ > >
[ns] R: in 802.11, ShortRetryLimit_ and LongRetryLimit_ "0" is same effect on simulation result as "1"?
Sangho,
this is the correct behavior.
According to the standard:
"The
short retry count for an MSDU or MMPDU and the STA short retry count
shall be incremented
every time transmission of a MAC frame of length
less than or equal to dot11RTSThreshold fails for that
MSDU or MMPDU.
This short retry count and the STA short retry count shall be reset
when a MAC frame of
length less than or equal to dot11RTSThreshold
succeeds for that MSDU or MMPDU. The long retry count for
an MSDU or
MMPDU and the STA long retry count shall be incremented every time
transmission of a MAC
frame of length greater than dot11RTSThreshold
fails for that MSDU or MMPDU. This long retry count and
the STA long
retry count shall be reset when a MAC frame of length greater than
dot11RTSThreshold succeeds
for that MSDU or MMPDU."
Regards,
Marco
Fiore
>Messaggio originale
>Da: [EMAIL PROTECTED]
>Data: 8-feb-2006 7.48 PM
>A:
>Ogg: [ns] in 802.11,
ShortRetryLimit_ and LongRetryLimit_ "0" is same effect on
simulation result as "1"?
>
>
>
>I experiment on 802.11 wired-
cum-wireless (wirelessLAN) with chanaging MAC
>retransmission from 0 to
5 in NS-2.29.
>
>The trace file of MAX retransmission "0" and "1" are
completely same.
>
>I change the value of MAX retransmission like
below,
>
> set par(rtxMax) 0
> <...>
>
Mac/802_11 set ShortRetryLimit_ $par(rtxMax);# retransmittions
> Mac/802_11 set LongRetryLimit_$par(rtxMax);#
retransmissions
> <...>
>
>
>ns-2.29/mac/mac-802_11.cc
>...
>if((u_int32_t) ch->size() <= macmib_.getRTSThreshold()) {
>rcount = &ssrc_;
> thresh = macmib_.
getShortRetryLimit();
>} else {
>rcount =
&slrc_;
> thresh = macmib_.getLongRetryLimit();
>
}
>
>(*rcount)++;
>
>if(*rcount >= thresh) {
>/* IEEE Spec section 9.2.3.5 says this should be
greater than
> or equal */
>macmib_.
FailedCount++;
>
>
>if this pacekts try to send at first time,
>rcount = 0 and increases to 1 by (*rocunt)++
>then, "if (*rcount >=
thresh)" check MAX retransmission threshold.
>whenever thresh is 0 or
1, it can't try to retransmission more, right?
>
>Is it normal results
(IEEE 802.11 standard)? or not? (ns-2 implementation problem?)
>
>
>please help me!
>
>
>sincerely,
>Sangho Lee
>
>
[ns] R: propagation model
Comments are inline. Regards, Marco Fiore >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 3-mar-2006 2.52 AM >A: >Ogg: [ns] propagation model > > >All, > >Is it possible to support multiple propagation model? as far as I know, no. > is this a good >design choice as if the d become > or < cross-over distance , it would >make a possibillity of more packet processing by MAC layer? that would be a correct design choice, as different propagation models fit better different distances. However, as said before, I do not think you can use multiple propagation models in a Tcl script. >If so, how could it be done when configuring a node in Tcl? I think that the only solution you have is to design your own propagation model...
[ns] R: "Check_pktCTRL: Invalid MAC Control subtype".
That error message is generated by 802.11. See mac/mac-802_11.cc for details. Regards, Marco Fiore >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 4-mar-2006 6.23 AM >A: >Ogg: [ns] "Check_pktCTRL: Invalid MAC Control subtype". > > >Hi, > > >I have written a routing algorithm (modification of AODV). when i run the >program, i get the error as > >"Check_pktCTRL: Invalid MAC Control subtype". > >Where could be the possible location of the error?. I checked the packet >formats of send routines, they are fine. > >I actually included the Hello packets . It gave me an error as "segmentation >fault". >When i removed the hello packets, i get the error as "Check_pktCTRL". > >If the error is with regards to the packet format, then whats the correct >format? i have used the same one as in AODV. > >Can someone please help me. > >Subashini. > > >
[ns] R: Help: Setdest Command
Norlida, try "./configure" instead of "configure" and after configure&make, check that a binary (executable) file "setdest" is created in the folder. Regards, Marco Fiore >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 13-mar-2006 7.07 AM >A: >Ogg: [ns] Help: Setdest Command > > >Hi, > > I would like to ask regarding "setdest" command. In the tutorial it says that: > > In order to compile the revised setdest.cc do the following: > 1. Go to ns directory and run "configure" (you probably have done that already while building ns). This creates a makefile for setdest. >2.Go to indep-utils/cmu-scen-gen/setdest. Run "make" , which first creates a stand-alone object file for ~ns/rng.cc (the stand-alone version doesnot use Tclcl libs) and then creates the executable setdest. >3. Run setdest with arguments as shown below: > > So, I have do the first command as below: > [EMAIL PROTECTED] ns]# configure > then the error would be: > bash: configure: command not found > > When I run the second command: > [EMAIL PROTECTED] setdest]# make > then the error would be: > make: Nothing to be done for 'all" > > When I run the third command: > ./setdest -n 50 -p 0 -s 20.0 -t 100 -x 500 -y 500 > scen-50-test > then the error would be: > bash: . /setdest: No such file or directory > > > File setdest.cc is in setdest folder. Inside the folder there is also Makefile, Makefile.in & rng.o file & others. > > I did not sure whether for command 1 & 2, that is the correct way to do so. > > I am using ns 2.26. I use command ./ns to run tcl script. > > Hope anybody can help me. > > Thank you & regards, > > norlida > > > > > >- >Brings words and photos together (easily) with > PhotoMail - it's free and works with Yahoo! Mail. >
[ns] R: regarding promiscuous mode
Krithiga, answers are inline. Regards, Marco Fiore >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 12-mar-2006 1.24 PM >A: , <[EMAIL PROTECTED]>, >Ogg: [ns] regarding promiscuous mode > > >hi all, > i am doing proj in mobile adhoc networks. i need to know some >clarifications regarding mobile adhoc networks. > >1. we need to make use of promiscuous mode for our proj. (i.e) a node need >to overhear the other transmissions that are happening in its transmission >range.. is it already implemented in NS2? >If so, kindly let me know the inbuilt function that can be used for >overhearing. Otherwise, how this overhearing concept can be implemented in >NS2? There's no promiscuous mode implementation in ns-2. However, you can easily add such feature in 802.11. In the file mac/mac-802_11.cc, look for the recv_timer() function, look for the "Address Filtering" section: there you can decide to pass the frame to the upper LL agent, instead of discarding it. >2. how can we determine the 2-hop neighbours of the node and maintain the >list of the same?? Two ways: the easy, "bad" one is to make it via tcl (e.g. at each time step, compute all inter-node distances and comunicate to each node the list of neighbors), the more complex, "good" one is to do that implementing in C++ some layer-3 mechanism which propagates the information on neighbor nodes using actual packets (many examples of that in literature). This second solution is preferable since it is more realistic (in the first case you have a no-error, no-cost information exchange!). I think you could loo for some existing C++ implementation and start your changes from there...
[ns] R: sending packets from objects within agent
Elise, you could have a look at the website: http://masimum.dif.um. es/?Documents where Francisco Ros and other researchers present their work on implementing a new routing protocol for ad-hoc networks. Regards, Marco Fiore >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 27-mar-2006 9.29 PM >A: >Ogg: [ns] sending packets from objects within agent > > >Hi, > >i have implemented a routing agent for ad-hoc routing, but i have a problem: >the agent attached to a node has several 'roles', so the agent has a central >subclass of agent, and contains several objects which take care of different >behaviours. >Now i need to send packets from those objects - how should i transmit the >Scheduler used in the central agent ? Or should i just transmit target_ ? >(or should i use another way to get those packets sent ?) (i use ns-2.29) >Masters of ns ;-) , i hope you can help me ! >thanks, > >Elise > >_ >Free blogging with MSN Spaces http://spaces.msn.com/?mkt=nl-be > >
Re: [ns] Trace file
Sara, the simplest way is probably to post-process your tracefile using awk or perl. Modifying the C++ code which generates the tracefile could be very time-consuming, as it is spread among all the implemented agents... Using awk or perl on the ns-2 tracefile you can print only some particular lines. Many references/tutorials/examples of both languages are available on the web. Regards, Marco Fiore > Original Message >From: [EMAIL PROTECTED] >Date: Mar 31, 2006 12:52 PM >To: "ns-users" >Subj: [ns] Trace file > > >Hi all, >Is there a simple mode to modify the trace file? >For example I wouldn't print the lines about beacon frames. >Thanks in advance , > >Sara. > >
[ns] R: why setdest so slow?
Guanhua, are you referring to the generation of the mobility traces or to the simulation of the network itself? In the first case that's very strange, in the second case it could be due to the fact that the default ns-2 scheduler is very slow in allocating events far in time. My advice is to patch the scheduler with the following code: http: //netlab.caltech.edu/~weixl/technical/ns2patch/ns2patch.htm Hope this helps, Marco Fiore >Messaggio originale >Da: [EMAIL PROTECTED] com >Data: 1-apr-2006 7.39 PM >A: >Ogg: [ns] why setdest so slow? > > >Hi, I am using the setdest tool in ns-2 to generate a mobility scenario that >has 200 users and lasts 1 hour. I used version 2. It took seven to eight >hours to generate only 800 seconds. Is this normal? I hope some people more >experienced with this can give me help. > >thanks, >Guanhua > > >
[ns] R: looking for"hcf" implementation
If you are referring to 802.11e HCF, you can find a couple of implementations at: http://info.iet.unipi.it/~cng/ns2hcca/ http://www- sop.inria.fr/planete/qni/Research.html Next time be more specific in your question and search the web or the ns-2 site for the information you are looking for, before mailing to the list (the above links are the first results of a Google query...) Regards, Marco Fiore > Messaggio originale >Da: [EMAIL PROTECTED] >Data: 1-apr- 2006 3.31 PM >A: >Ogg: [ns] looking for" hcf" implementation > > >Hello ,everybody! >I am looking for hcf implementation,can anyone help me please? > >_ >Express yourself instantly with MSN Messenger! Download today - it's FREE! >http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/ > >
[ns] DataRate in Header
Hi everyone, does anybody know if and where the DataRate at which packets are transmitted on a wireless channel is recorded in some header? Thanks, Marco Fiore
[ns] R: make: *** No rule to make target `tcl/lib/noah.tcl', needed by `gen/ns_tcl.cc'. Stop.
Qasim,
the error messages you get informs you that the
file
tcl/lib/noah.tcl could not be find. Check that
the path is correct and
the file exists.
Regards,
Marco Fiore
>Messaggio originale
>Da: [EMAIL PROTECTED]
>Data: 4-apr-2006 3.27 PM
>A: <[EMAIL PROTECTED]
EDU>
>Ogg: [ns] make: *** No rule to make target `tcl/lib/noah.
tcl', needed by `gen/ns_tcl.cc'. Stop.
>
>
>Dear All
>
>I am
trying to implement the Noah protocol. After following the
>instructions below
>##
>Makefile.in add noah/noah.o
\ to OBJ_CC and tcl/mobility/noah.tcl \ to
>NS_TCL_LIB
>noah/noah.{h,
cc} add noah.h and noah.cc to a new subdirectory noah/
>tcl/mobility/noah.tcl add noah.tcl to tcl/mobility/
>tcl/lib/ns-lib.
tcl.h line 191: add source ../mobility/noah.tcl
>line 603ff: add
>
>
NOAH {
> set ragent [$self create-noah-agent $node]
> }
>
>line 768ff: add
>
>Simulator instproc create-noah-agent { node } {
># Create a noah routing agent for this node
>set ragent [new
Agent/NOAH]
>
>## setup address (supports hier-addr) for noah agent
>## and mobilenode
>set addr [$node node-addr]
>
>$ragent
addr $addr
>$ragent node $node
>
>if [Simulator set mobile_ip_]
{
>$ragent port-dmux [$node demux]
>}
>$node addr $addr
>$node set ragent_ $ragent
>return $ragent
>}
>##
>
>I get the following problem
>first I was told to run config
>I ran ./config
>than I ran "make
clean"
>and then I ran "make
>
>but after a while it has given me this
error
>
>make: *** No rule to make target `tcl/lib/noah.tcl', needed by
>`gen/ns_tcl.cc'. Stop.
>
>please help
>
>your help is very much
appreciated
>
>regards
>
>Qasim UK
>
>
>
[ns] R: Re: Set address to ns node
If I got it right, what you are trying to do is to perform a per-packet distributed queue managament between two nodes which are not directly linked. I think there could be a way to do that in ns-2 (you could use the getNodeById() function to obtain access to the node, and then look into its queue - do not remember the way, but there is one). However, in my opinion, this would definitely be unfeasible in a real network, making simulation somehow useless... Regards, Marco Fiore > Messaggio originale >Da: [EMAIL PROTECTED] >Data: 12-apr-2006 11.10 AM >A: >Ogg: Re: [ns] Set address to ns node > > >Hello all > >I have a topology like this > > __n2 > / \ >Src--- n1/ \n4__Dst > \___ / > n3 > >>From the src the packets are send both to n2 and n3 in a probabilistic >manner. My problem is for every iteration n4 should receive one packet >either from n2 or n3 depending on minimum packet sequence number. For e.g. >if n2 has packet 2 at the head of the queue and n3 has packet 1 at the head >of its queue. n4 should receive packet from n3. How can i do that comparing >two queues in different links and dequeing that packet to n4. > >Cordialement >Sandoche BALAKRICHENAN. >
[ns] R: how to install random-waypoint model in ns-2.27
You cannot "install" mobility models in ns-2. Nodes mobility is defined using the "setdest" command in your tcl script (you can find a simple example in tcl/ex/simple-wireless.tcl). When a complex mobility model is needed "setdest" commands can be generated from a mobility generator, and can then be provided as a trace file to ns-2. Several mobility generators are capable of producing ns-2 mobility traces. If you are interested in RWM, you can have a look at BonnMotion, IMPORTANT, or even to the simple tool which is provided with the official ns-2 distribution (in indep-utils/cmu-scen-gen). Regards, Marco Fiore >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 14-apr-2006 12.54 AM >A: >Ogg: [ns] how to install random-waypoint model in ns-2.27 > > >Hello everybody > I want to installing random-waypoint model in ns-2.27 or ns-2.29,how can i do to install it? > please help me,thanks > > >- > Faites de Yahoo! votre page d'accueil sur le web pour retrouver directement vos services préférés : vérifiez vos nouveaux mails, lancez vos recherches et suivez l'actualité en temps réel. Cliquez ici. >
[ns] R: which trace format is more accurate?
Sasan,
both versions of tracefile report the same information.
The
difference only lies in the format (actually, the
new trace format is
somehow more complete).
So they are accurate in the same way, but the
point
is that you can't use the same awk script on both!
You have to
write two versions of you awk script,
and then you'll get the same
results.
Regards,
Marco Fiore
>Messaggio originale
>Da:
[EMAIL PROTECTED]
>Data: 15-apr-2006 8.06 AM
>A:
>Ogg: [ns] which trace format is more accurate?
>
>
>Hi All,
>
>I am
generating both trace formats (old and new) for the "exact" same
>simulation, and for instance I count total number of messages sent as
>below (in my awk file)
>
>$1~/s/ && /AGT/ { sent ++; }
>
>but I get
two different results
>
>now I wonder, which one of the trace files are
accurate? which one should
>I pick? the version is 2.29.
>
>I'll
appreciate your advice.
>
>Thanks,
>Sasan
>
>
>
>
[ns] R: Re: R: which trace format is more accurate?
Sasan,
I see your point.
How much do differ results you got in the two
cases?
By exact same simulation you mean that you simply
changed the
trace format and nothing else (included
the machine you working on)?
Regards,
Marco Fiore
>Messaggio originale
>Da: [EMAIL PROTECTED]
ucc.ie
>Data: 15-apr-2006 9.33 PM
>A: "Marco Fiore"<[EMAIL PROTECTED]>
>Cc: <[EMAIL PROTECTED]>,
>Ogg: Re: R: [ns]
which trace format is more accurate?
>
>Marco,
>
>I agree that I need
separate awk scripts for different trace formats but
>the particular
example that I gave below is straight forward
>
>$1~/s/ && /AGT/ {
sent ++; }
>
>and should return total number of sents message in a
simulation and that
>still returns different values (unless this is not
the correct way to
>calculate the total sent messages)
>
>what do you
think?
>
>Thanks,
>Sasan
>
>
>
>> Sasan,
>>
>> both versions of
tracefile report the same information.
>> The
>> difference only lies
in the format (actually, the
>> new trace format is
>> somehow more
complete).
>> So they are accurate in the same way, but the
>> point
>>
is that you can't use the same awk script on both!
>> You have to
>>
write two versions of you awk script,
>> and then you'll get the same
>> results.
>>
>> Regards,
>>
>> Marco Fiore
>>
>>>Messaggio
originale
>>>Da:
>> [EMAIL PROTECTED]
>>>Data: 15-apr-2006 8.06
AM
>>>A:
>>>Ogg: [ns] which trace format is more
accurate?
>>>
>>>
>>>Hi All,
>>>
>>>I am
>> generating both trace
formats (old and new) for the "exact" same
>>>simulation, and for
instance I count total number of messages sent as
>>>below (in my awk
file)
>>>
>>>$1~/s/ && /AGT/ { sent ++; }
>>>
>>>but I get
>> two
different results
>>>
>>>now I wonder, which one of the trace files are
>> accurate? which one should
>>>I pick? the version is 2.29.
>>>
>>>I'll
>> appreciate your advice.
>>>
>>>Thanks,
>>>Sasan
>>>
>>>
>>>
>>>
>>
>>
>>
>
>
>
[ns] R: help regarding trace file
Please have a look to ns manual, ns mailing list history and relative FAQ before posting to the mailing list itself! This is the third or fourth mail about trace file format this month! Regards, Marco Fiore >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 19- apr-2006 9.36 AM >A: , <[EMAIL PROTECTED]>, >Ogg: [ns] help regarding trace file > > > i m working on simualtion of AD-Hoc routing algorithms DSDV, DSR, AODV. i unable to extract data form trace files. So please send me how to read trace file , which coloum of trace file show packet id? & how to calculate Throughput and Delay. i have attached trace file of DSDV algorithm. > please help me. > > >s 0.032821055 _1_ RTR --- 0 message 32 [0 0 0 0] --- [1:255 -1:255 >32 0] >s 0.178591360 _2_ RTR --- 1 message 32 [0 0 0 0] --- [2:255 -1:255 >32 0] >s 1.113402886 _0_ RTR --- 2 message 32 [0 0 0 0] --- [0:255 -1:255 >32 0] >M 10.0 0 (5.00, 5.00, 0.00), (45.00, 285.00), 5.00 >s 10.0 _0_ AGT --- 3 tcp 40 [0 0 0 0] --- [0:0 1:0 32 0] > [0 0] 0 0 >r 10.0 _0_ RTR --- 3 tcp 40 [0 0 0 0] --- [0:0 1:0 32 0] >[0 0] 0 0 >s 12.530838300 _0_ RTR --- 4 message 32 [0 0 0 0] --- [0:255 >-1:255 32 0] >s 13.830059915 _2_ RTR --- 5 message 32 [0 0 0 0] --- [2:255 >-1:255 32 0] >s 14.280428760 _1_ RTR --- 6 message 32 [0 0 0 0] --- [1:255 >-1:255 32 0] >M 15.0 1 (390.00, 385.00, 0.00), (250.00, 250.00), 3.00 >s 16.0 _0_ AGT --- 7 tcp 40 [0 0 0 0] --- [0:0 1:0 32 0] > [0 0] 0 0 >r 16.0 _0_ RTR --- 7 tcp 40 [0 0 0 0] --- [0:0 1:0 32 0] >[0 0] 0 0 >s 25.369352037 _0_ RTR --- 8 message 32 [0 0 0 0] --- [0:255 >-1:255 32 0] >r 25.370484730 _2_ RTR --- 8 message 32 [0 0 800] --- >[0:255 -1:255 32 0] >s 26.386541965 _2_ RTR --- 9 message 32 [0 0 0 0] --- [2:255 >-1: 255 32 0] >r 26.387454644 _0_ RTR --- 9 message 32 [0 2 800] --- >[2:255 -1:255 32 0] >r 26.387454789 _1_ RTR --- 9 message 32 [0 2 800] --- >[2:255 -1:255 32 0] >s 27.274269018 _1_ RTR --- 10 message 32 [0 0 0 0] --- [1:255 >-1:255 32 0] >r 27.275141834 _2_ RTR --- 10 message 32 [0 1 800] --- >[1: 255 -1:255 32 0] >s 28.0 _0_ AGT --- 11 tcp 40 [0 0 0 0] --- [0:0 1:0 32 0] >[0 0] 0 0 >r 28.0 _0_ RTR --- 11 tcp 40 [0 0 0 0] --- [0:0 1:0 32 0] >[0 0] 0 0 >s 37.379947379 _2_ RTR --- 12 message 32 [0 0 0 0] --- [2:255 >-1:255 32 0] >r 37.380919914 _0_ RTR --- 12 message 32 [0 2 800] --- >[2: 255 -1:255 32 0] >r 37.380920097 _1_ RTR --- 12 message 32 [0 2 800] --- >[2:255 -1:255 32 0] >s 37.425885784 _0_ RTR --- 13 message 32 [0 0 0 0] --- [0:255 >-1:255 32 0] >r 37.426998317 _2_ RTR --- 13 message 32 [0 0 800] --- >[0: 255 -1:255 32 0] >s 38.388685824 _1_ RTR --- 14 message 32 [0 0 0 0] --- [1:255 >-1:255 32 0] >r 38.389638533 _2_ RTR --- 14 message 32 [0 1 800] --- >[1:255 -1:255 32 0] >s 38.432288490 _0_ RTR --- 15 message 32 [0 0 0 0] --- [0:255 >-1:255 32 0] >r 38.433061011 _2_ RTR --- 15 message 32 [0 0 800] --- >[0: 255 -1:255 32 0] >s 39.277760075 _2_ RTR --- 16 message 32 [0 0 0 0] --- [2:255 >-1:255 32 0] >r 39.278692587 _0_ RTR --- 16 message 32 [0 2 800] --- >[2:255 -1:255 32 0] >s 39.278692587 _0_ RTR --- 3 tcp 80 [0 0 0 0] --- [0:0 1:0 32 2] >[0 0] 0 0 >s 39.278692587 _0_ RTR --- 7 tcp 80 [0 0 0 0] --- [0:0 1:0 32 2] > [0 0] 0 0 >D 39.278692587 _0_ IFQ ARP 3 tcp 80 [0 0 0 800] --- [0: 0 1:0 32 2] >[0 0] 0 0 >s 39.278692587 _0_ RTR --- 11 tcp 80 [0 0 0 0] --- [0:0 1:0 32 2] >[0 0] 0 0 >D 39.278692587 _0_ IFQ ARP 7 tcp 80 [0 0 0 800] --- [0:0 1:0 32 2] >[0 0] 0 0 >r 39.278692775 _1_ RTR --- 16 message 32 [0 2 800] --- >[2:255 -1:255 32 0] >r 39.284898168 _2_ RTR --- 11 tcp 80 [13a 2 0 800] --- [0: 0 1:0 32 >2] [0 0] 1 0 >f 39.284898168 _2_ RTR --- 11 tcp 80 [13a 2 0 800] --- [0:0 1:0 31 >1] [0 0] 1 0 >r 39.293478160 _1_ AGT --- 11 tcp 80 [13a 1 2 800] --- [0:0 1:0 31 >1] [0 0] 2 0 >s 39.293478160 _1_ AGT --- 17 ack 40 [0 0 0 0] --- [1:0 0:0 32 0] >[0 0] 0 0 >r 39.293478160 _1_ RTR --- 17 ack 40 [0 0 0 0] --- [1:0 0:0 32 0] > [0 0] 0 0 >s 39.293478160 _1_ RTR --- 17 ack 60 [0 0 0 0] --- [1:0 0:0 32 2] >[0 0] 0 0 >r 39.295636260 _2_ RTR --- 17 ack 60 [13a 2 1 800] --- [1:0 0:0 32 >2] [0 0] 1 0 >f 39.295636260 _2_ RTR --- 17 ack 60 [13a 2 1 800] --- [1:0 0:0 31 >0] [0 0] 1 0 >r 39.297773794
[ns] R: Re: R: which trace format is more accurate?
Sasan,
don't have a clue on that.
I fear the only way is to analyze
the trace files
by hand to spot the differences. Maybe printing
the
sending times (using an awk script) can
speed up the process.
Let us
know if you can solve the problem.
Regards,
Marco Fiore
>
Messaggio originale
>Da: [EMAIL PROTECTED]
>Data: 19-apr-2006
12.47 PM
>A: "Marco Fiore"<[EMAIL PROTECTED]>
>Cc: <[EMAIL PROTECTED]
ie>,
>Ogg: Re: R: [ns] which trace format is more
accurate?
>
>Marco,
>
>This is the exact point,
>
>the difference is
about 300 to 400 for 100 sec sim time
>
>I reran the same simulation
and all I did was to change the trace format,
>but I see such a
difference in number of sent
>
>$1~/s/ && /AGT/ { sent ++; }
>
>any
comments?
>
>both running on the same machine. all the equipment and
environment
>settings are the same. you might be able to reproduce it
easily.
>
>Thanks,
>Sasan
>
>
>> Sasan,
>>
>> I see your point.
>> How
much do differ results you got in the two
>> cases?
>> By exact same
simulation you mean that you simply
>> changed the
>> trace format and
nothing else (included
>> the machine you working on)?
>>
>> Regards,
>>
>> Marco Fiore
>>
>>>Messaggio originale
>>>Da: [EMAIL PROTECTED]
cs.
>> ucc.ie
>>>Data: 15-apr-2006 9.33 PM
>>>A: "Marco Fiore"
<[EMAIL PROTECTED]>
>>>Cc: <[EMAIL PROTECTED]>,
>>>Ogg: Re: R: [ns]
>> which trace format is more accurate?
>>>
>>>Marco,
>>>
>>>I agree that I need
>> separate awk scripts for
different trace formats but
>>>the particular
>> example that I gave
below is straight forward
>>>
>>>$1~/s/ && /AGT/ {
>> sent ++; }
>>>
>>>and should return total number of sents message in a
>> simulation
and that
>>>still returns different values (unless this is not
>> the
correct way to
>>>calculate the total sent messages)
>>>
>>>what do you
>> think?
>>>
>>>Thanks,
>>>Sasan
>>>
>>>
>>>
>>>> Sasan,
>>>>
>>>>
both versions of
>> tracefile report the same information.
>>>> The
>>>> difference only lies
>> in the format (actually, the
>>>> new
trace format is
>>>> somehow more
>> complete).
>>>> So they are
accurate in the same way, but the
>>>> point
>>>>
>> is that you can't
use the same awk script on both!
>>>> You have to
>>>>
>> write two
versions of you awk script,
>>>> and then you'll get the same
>>>>
results.
>>>>
>>>> Regards,
>>>>
>>>> Marco Fiore
>>>>
>>>>>
Messaggio
>> originale
>>>>>Da:
>>>> [EMAIL PROTECTED]
>>>>>Data: 15-apr-2006 8.06
>> AM
>>>>>A:
>>>>>Ogg:
[ns] which trace format is more
>> accurate?
>>>>>
>>>>>
>>>>>Hi All,
>>>>>
>>>>>I am
>>>> generating both trace
>> formats (old and new) for
the "exact" same
>>>>>simulation, and for
>> instance I count total
number of messages sent as
>>>>>below (in my awk
>> file)
>>>>>
>>>>>$1~/s/ && /AGT/ { sent ++; }
>>>>>
>>>>>but I get
>>>> two
>>
different results
>>>>>
>>>>>now I wonder, which one of the trace files
are
>>>> accurate? which one should
>>>>>I pick? the version is 2.29.
>>>>>
>>>>>I'll
>>>> appreciate your advice.
>>>>>
>>>>>Thanks,
>>>>>Sasan
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>
>>
>>
>
>
>
[ns] R: help regarding for awk file
For simple topologies/statistics, you may give a look at trace2stats: http://www.reti.polito.it/fiore Regards, Marco Fiore >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 26-apr-2006 1.25 PM >A: "ns_users_request"<[EMAIL PROTECTED]>, "ns_users" >Ogg: [ns] help regarding for awk file > > > >i m working on simulation of adhoc networks. i want throughput & Delay calculation awk program for trace file analysis. >thanks >
[ns] R: Which ad hoc routing protocol is used in 802.11?
Jeevesh, 802.11 is a MAC level protocol, thus it can be used with *any* routing protocol you want. I think the default one in ns-2 wireless simulations is DSDV. You can verify that (and possibile change the routing protocol) by looking at mobile node configuration in your tcl script. Regards, Marco Fiore >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 26-apr-2006 12.46 PM >A: "NS USERS" >Ogg: [ns] Which ad hoc routing protocol is used in 802.11? > > >Hi All, > Which ad hoc routing protocol is used in 802.11? I can't find any information about this. Can any one help me? > Thanks a lot. > Best regards. > > jeevesh kumar > > >- > Jiyo cricket on Yahoo! India cricket >Yahoo! Messenger Mobile Stay in touch with your buddies all the time. >
[ns] R: Adhoc Rounting Overhead
Diego, you are looking at MAC level frames (lower layer with respect to routing one). If you do not need them (and you should not, if you are evaluating the routing protocol overhead), you can turn MAC level tracing OFF in mobile node configuration in your tcl script (refer to the ns manual for that). Regards, Marco Fiore >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 25-apr-2006 6.33 PM >A: "ns_users" >Ogg: [ns] Adhoc Rounting Overhead > > >Hello NS users, > >I am working on some Adhoc simulations for my graduation project, and I am >trying to describe this protocols behavior and performance, for some >different environment. One metric that I am analysing is Rounting Overhead. >During my analysis I realised that in my trace file I have some AODV >packets, some CBR packets, and some packets that I don't know that they are, >and if I should count them for this metric. >Can any one tell me that are this packets? Should I count them as Routing >packets or data packets? Should I ignore them? >I attached below this packets. >Thanks in advance. > > >s -t 41.07456 -Hs 8 -Hd -2 -Ni 8 -Nx 791.27 -Ny 793.35 -Nz 0.00 -Ne - >1.00 -Nl MAC -Nw --- -Ma 0 -Md -Ms 8 -Mt 806 -P arp -Po REQUEST >-Pms 8 -Ps 8 -Pmd 0 -Pd 1 > >s -t 41.023318192 -Hs 1 -Hd -2 -Ni 1 -Nx 612.03 -Ny 664.36 -Nz 0.00 -Ne - >1. 00 -Nl MAC -Nw --- -Ma 41e -Md 8 -Ms 1 -Mt 0 > >s -t 41.023680928 - Hs 8 -Hd -2 -Ni 8 -Nx 791.27 -Ny 793.34 -Nz 0.00 -Ne - >1.00 -Nl MAC -Nw --- -Ma 2e4 -Md 1 -Ms 0 -Mt 0 > >s -t 41.023995664 -Hs 1 -Hd -2 -Ni 1 -Nx 612.04 -Ny 664.36 -Nz 0.00 -Ne - >1.00 -Nl MAC -Nw --- - Ma 13a -Md 8 -Ms 1 -Mt 806 -P arp -Po REPLY -Pms 1 >-Ps 1 -Pmd 8 -Pd 8 > >s -t 41.024422400 -Hs 8 -Hd -2 -Ni 8 -Nx 791.27 -Ny 793.33 -Nz 0.00 - Ne - >1.00 -Nl MAC -Nw --- -Ma 0 -Md 1 -Ms 0 -Mt 0 > >s -t 41.024836400 -Hs 8 -Hd -2 -Ni 8 -Nx 791.27 -Ny 793.33 -Nz 0.00 -Ne - >1. 00 -Nl MAC -Nw --- -Ma 45e -Md 1 -Ms 8 -Mt 0 > >s -t 41.025199136 - Hs 1 -Hd -2 -Ni 1 -Nx 612.05 -Ny 664.36 -Nz 0.00 -Ne - >1.00 -Nl MAC -Nw --- -Ma 324 -Md 8 -Ms 0 -Mt 0 > >s -t 41.026004608 -Hs 1 -Hd -2 -Ni 1 -Nx 612.06 -Ny 664.36 -Nz 0.00 -Ne - >1.00 -Nl MAC -Nw --- - Ma 0 -Md 8 -Ms 0 -Mt 0 > >s -t 41.026598608 -Hs 1 -Hd -2 -Ni 1 -Nx 612.06 -Ny 664.36 -Nz 0.00 -Ne - >1.00 -Nl MAC -Nw --- -Ma 0 -Md -Ms 1 -Mt 806 -P arp -Po REQUEST >-Pms 1 -Ps 1 -Pmd 0 -Pd 6 > >s -t 41.027354427 -Hs 6 -Hd -2 -Ni 6 -Nx 370.36 -Ny 620.18 -Nz 0.00 - Ne - >1.00 -Nl MAC -Nw --- -Ma 41e -Md 1 -Ms 6 -Mt 0 > >s -t 41.027717246 -Hs 1 -Hd -2 -Ni 1 -Nx 612.07 -Ny 664.36 -Nz 0.00 -Ne - >1. 00 -Nl MAC -Nw --- -Ma 2e4 -Md 6 -Ms 0 -Mt 0 > >s -t 41.028032065 - Hs 6 -Hd -2 -Ni 6 -Nx 370.35 -Ny 620.18 -Nz 0.00 -Ne - >1.00 -Nl MAC -Nw --- -Ma 13a -Md 1 -Ms 6 -Mt 806 -P arp -Po REPLY -Pms 6 >-Ps 6 - Pmd 1 -Pd 1 > >s -t 41.028458884 -Hs 1 -Hd -2 -Ni 1 -Nx 612.08 -Ny 664.36 -Nz 0.00 -Ne - >1.00 -Nl MAC -Nw --- -Ma 0 -Md 6 -Ms 0 -Mt 0 > >s -t 41.029272884 -Hs 1 -Hd -2 -Ni 1 -Nx 612.09 -Ny 664.37 -Nz 0.00 - Ne - >1.00 -Nl MAC -Nw --- -Ma 45e -Md 6 -Ms 1 -Mt 0 > >s -t 41.029635704 -Hs 6 -Hd -2 -Ni 6 -Nx 370.34 -Ny 620.19 -Nz 0.00 -Ne - >1. 00 -Nl MAC -Nw --- -Ma 324 -Md 1 -Ms 0 -Mt 0 > >s -t 41.030441342 - Hs 6 -Hd -2 -Ni 6 -Nx 370.34 -Ny 620.20 -Nz 0.00 -Ne - >1.00 -Nl MAC -Nw --- -Ma 0 -Md 1 -Ms 0 -Mt 0 > >s -t 41.030935342 -Hs 6 -Hd -2 - Ni 6 -Nx 370.33 -Ny 620.20 -Nz 0.00 -Ne - >1.00 -Nl MAC -Nw --- -Ma 0 -Md -Ms 6 -Mt 806 -P arp -Po REQUEST >-Pms 6 -Ps 6 -Pmd 0 - Pd 7 > >s -t 41.032030786 -Hs 7 -Hd -2 -Ni 7 -Nx 237.60 -Ny 632.41 -Nz 0.00 -Ne - >1.00 -Nl MAC -Nw --- -Ma 41e -Md 6 -Ms 7 -Mt 0 > >s -t 41.032393231 -Hs 6 -Hd -2 -Ni 6 -Nx 370.32 -Ny 620.21 -Nz 0.00 -Ne - >1. 00 -Nl MAC -Nw --- -Ma 2e4 -Md 7 -Ms 0 -Mt 0 > >s -t 41.032707675 - Hs 7 -Hd -2 -Ni 7 -Nx 237.60 -Ny 632.41 -Nz 0.00 -Ne - >1.00 -Nl MAC -Nw --- -Ma 13a -Md 6 -Ms 7 -Mt 806 -P arp -Po REPLY -Pms 7 >-Ps 7 - Pmd 6 -Pd 6 > >s -t 41.033134119 -Hs 6 -Hd -2 -Ni 6 -Nx 370.32 -Ny 620.21 -Nz 0.00 -Ne - >1.00 -Nl MAC -Nw --- -Ma 0 -Md 7 -Ms 0 -Mt 0 > >s -t 41.034048119 -Hs 6 -Hd -2 -Ni 6 -Nx 370.31 -Ny 620.22 -Nz 0.00 - Ne - >1.00 -Nl MAC -Nw --- -Ma 45e -Md 7 -Ms 6 -Mt 0 > >s -t 41.034410563 -Hs 7 -Hd -2 -Ni 7 -Nx 237.60 -Ny 632.41 -Nz 0.00 -Ne - >1. 00 -Nl MAC -Nw --- -Ma 324 -Md 6 -Ms 0 -Mt 0 > >s -t 41.035215452 - Hs 7 -Hd -2 -Ni 7 -Nx 237.60 -Ny 632.41 -Nz 0.00 -Ne - >1.00 -Nl MAC -Nw --- -Ma 0 -Md 6 -Ms 0 -Mt 0 > >s -t 41.035689452 -Hs 7 -Hd -2 - Ni 7 -Nx 237.60 -Ny 632.41 -Nz 0.00 -Ne - >1.00 -Nl MAC -Nw --- -Ma bfe -Md 6 -Ms 7 -Mt 0 > >s -t 41.036051896 -Hs 6 -Hd
[ns] R: codes of mobility models in adhoc.
Look for projects such as IMPORTANT, BonnMotion, CanuMobiSim. Regards, Marco Fiore >Messaggio originale >Da: [EMAIL PROTECTED] com >Data: 25-apr-2006 12.23 PM >A: >Ogg: [ns] codes of mobility models in adhoc. > > >hi every body >im interested in a project dealing with mobility models (especially group >mobility models) in adhoc, i can't find the source codes of mobility models, >i just found the one of RWMM. >please if any one has an idea on this topic i would really be grateful if >you help me. >thanks alot in advance. > >_ >Testez Windows Live Mail Beta ! http://www.ideas.live.com/ > >
[ns] R: Modifying 802.11 wireless Channel Propagation Delay
Look for the define line commanding the propagation delay of the wireless channel in mac/mac-802_11.h. Regards, Marco Fiore > Messaggio originale >Da: [EMAIL PROTECTED] >Data: 5-mag-2006 9.49 AM >A: >Ogg: [ns] Modifying 802.11 wireless Channel Propagation Delay > > > >Hi, > >Does anyone know how I can change the wireless channel propagation delay. > >I have two mobile nodes, use FTP over TCP, with RTS-CTS mechanism. > >I want to increase the delay, so that every packet (including the control >packets) passing the channel goes though this delay. Then I want to >increase this delay, until there wouldn't be any throughput because the >CTS_Timeout expires and the transmitter keeps retransmitting the RTS packet >until it stops. > >Any ideas, please let me know. > >Regards, > >Bahman > > >
[ns] R: calculate >> jitter,delay,throughput !!
You can try with tracegraph (http://www.tracegraph.com) or, for simple statistics, with trace2stats (http://www.reti.polito.it/fiore). Regards, Marco Fiore >Messaggio originale >Da: m. [EMAIL PROTECTED] >Data: 17-mag-2006 12.45 AM >A: >Ogg: [ns] calculate >> jitter,delay,throughput !! > > >hi all, > > am doing a multimedia experiment .. and i need to compute the JITTER, >DELAY, & THROUGHPUT !! then i would like to PLOT them ?!! how do i do that >?! is it all in the trace file ? > >anyways .. am using windowsXP sp2/CYGWIN .. ns-2.29-allinone ... > >thanx in advance >
[ns] R: Underwater acoustic channel model?
Christian, ns-2 does not support any of the models/protocols you mentioned. I think you will have to code and add to the simulator them if you want to use them within ns. Regards, Marco Fiore > Messaggio originale >Da: [EMAIL PROTECTED] >Data: 19-mag- 2006 4.09 PM >A: >Ogg: [ns] Underwater acoustic channel model? > > >Hi guys, > >I'm very new to ns, and I'm trying to figure out whether or not I'll >need to develop some new models for what I need to do. If found no >documentation on what I'm looking for. Can anyone tell me if ns has >support for any of the following? > >- Underwater acoustic channels in which the noise level isn't uniformly >dispersed? (I.e., where there are point-sources of acoustic noise that >interfere with communication.) > >- Underwater acoustic channels where certain propagation paths simply >don't exist? (The varied sound speed of water in a given environment >can lead to some really wacky propagation paths.) > >- Directionally-transmitting modems. (The beam pattern can be somewhat >complex, because the directionality can be accomplished using a >multi-transducer array. This leads to a main lobe of sound in the >intended direction, and some weaker lobes of sound in directions >adjacent to the intended direction of transmission.) > >- MAC protocols for any commercially available underwater acoustic >modems (such as WHOI MicroModems). > >I'm very grateful for any suggestions. > >Thanks, >Christian > >
[ns] R: WLAN and SCTP?
Hi, unfortunately, ns-2 SCTP implementation does not currently support wireless links. Regards, Marco Fiore >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 22-mag-2006 3.09 AM >A: >Ogg: [ns] WLAN and SCTP? > > >Hi, > >I am a posgraduate in Beijing University of Posts and Communications(BUPT) >in China.I am working on handover,nowadays,I plan to do some research on >WLAN with SCTP,but I have not found some useful resources and modules,I am a >beginner in NS,if anyone have or had done the same research,I hope you can >give me some advice,modules are appreciated,thanks a lot. > >best regards, >-- >jiangren >[EMAIL PROTECTED] >
[ns] R: About the multihome in SCTP!
SCTP is not designed to work with wireless links. You should add wireless support yourself, by extending the multihome-attach-agent and multihome-add-destination methods in tcl/lib/ns-lib.tcl. If you look there, you will see that only wired liks are supported, and you should add wireless links support as well. Regards, Marco Fiore > Messaggio originale >Da: [EMAIL PROTECTED] >Data: 7-giu-2006 11.07 AM >A: >Ogg: [ns] About the multihome in SCTP! > > >Hi, > >I want to know how to configure a SCTP node in NS2.29,the type of address is >hierachical.I simulate the code in WLAN,there are some other >nodes:CN,Router,BS.The MN node in my simulation is made up of three nodes, >they are configured the same attribute.Please give me some advice
[ns] R: two equal UDP CBR flows in droptail queue get different bandwidths?
Eduardo, it could be a synchronization issue. Try to avoid synchronization between flows by setting the random flag of the cbr flows to true: "$cbr_name set random_ 1". Regards, Marco Fiore > Messaggio originale >Da: [EMAIL PROTECTED] >Data: 7-giu-2006 3.00 PM >A: >Ogg: [ns] two equal UDP CBR flows in droptail queue get differentbandwidths? > > >Hi there: > >I've set up this experiment. I have two source nodes S1 and S2 directly >connected to a node R1 and two destination nodes D1 and D2 also directly >connected to a node R2. Nodes R1 and R2 are connected. All links are 1 Mb/s >Full duplex with DropTail. Now, here's the thing. I set up two flows, one >going from S1 to D1 and the other one form S2 to D2. Both flows are UDP CBR 1 >Mb/s. Flow 1 starts at t=0 and finishes at t=20. flow 2 starts at t=10 and >stops at t=15. Sim runs from t=0 to t=25. > >I'd expect that at t=10 (when flow 2 starts), both flows would experience the >same amount of packet losses, so that each one would use about 0.5Mb/s of the >link between R1 and R2. But what really happens is that from t=10 to t=15, >flow 2 uses all bandwidth while flow 1 loses all packets. Since both flows >have the same parameters, shouldn't they receive the same share of bandwidth >during that period? Or am i missing something here? > >Thanks in advance. > >-- >Eduardo J. Ortega - Linux user #222873 >"No fake - I'm a big fan of konqueror, and I use it for everything." -- Linus >Torvalds > >
[ns] R: Re: R: two equal UDP CBR flows in droptail queue get different bandwidths?
Eduardo, the flag simply introduces a random delay to each packet (i. e. the CBR sources does not send 1 pkt ever T seconds, but every T+random(-T/2,T/2). I am not sure about the random interval, but this is the way it works, and it is useful to avoid that the two sources transmit at the same *exact* time. Regards, Marco Fiore > Messaggio originale >Da: [EMAIL PROTECTED] >Data: 8-giu-2006 5.09 AM >A: "Marco Fiore"<[EMAIL PROTECTED]> >Ogg: Re: R: [ns] two equal UDP CBR flows in droptail queue get different bandwidths? > >That does this flag do exactly? >On Wednesday 07 June 2006 08:39, Marco Fiore wrote: >> Eduardo, >> >> it could be a synchronization issue. >> Try to avoid >> synchronization between flows >> by setting the random flag of the cbr >> flows >> to true: "$cbr_name set random_ 1". >> >> Regards, >> >> Marco Fiore >> >> > >> >> Messaggio originale >> >> >Da: [EMAIL PROTECTED] >> >Data: 7-giu-2006 >> >> 3.00 PM >> >> >A: >> >Ogg: [ns] two equal UDP CBR flows in >> >> droptail queue get differentbandwidths? >> >> >Hi there: >> > >> >I've set up >> >> this experiment. I have two source nodes S1 and S2 directly >> >> >connected >> >> to a node R1 and two destination nodes D1 and D2 also directly >> >> >connected to a node R2. Nodes R1 and R2 are connected. All links are 1 >> >> Mb/s >> >> >Full duplex with DropTail. Now, here's the thing. I set up two >> >> flows, one >> >> >going from S1 to D1 and the other one form S2 to D2. Both >> >> flows are UDP CBR 1 >> >> >Mb/s. Flow 1 starts at t=0 and finishes at t=20. >> >> flow 2 starts at t=10 and >> >> >stops at t=15. Sim runs from t=0 to t=25. >> > >> >I'd expect that at t=10 (when flow 2 starts), both flows would >> >> experience the >> >> >same amount of packet losses, so that each one would >> >> use about 0.5Mb/s of the >> >> >link between R1 and R2. But what really >> >> happens is that from t=10 to t=15, >> >> >flow 2 uses all bandwidth while >> >> flow 1 loses all packets. Since both flows >> >> >have the same parameters, >> >> shouldn't they receive the same share of bandwidth >> >> >during that >> >> period? Or am i missing something here? >> >> >Thanks in advance. >> > >> >-- >> >Eduardo J. Ortega - Linux user #222873 >> >"No fake - I'm a big fan of >> >> konqueror, and I use it for everything." -- Linus >> >> >Torvalds > >-- >Eduardo J. Ortega - Linux user #222873 >" No fake - I'm a big fan of konqueror, and I use it for everything." -- Linus >Torvalds >
[ns] R: Autorate in 802.11G
>However this modification is not working, I see that everytime
> the
dataRate is at 54Mbps, including if I comment
>every line that define
the dataRate, including the lines
>
> tcl.evalf("Mac/802_11 set
dataRate_");
>if (strcmp(tcl.result(), "0") != 0)
>
bind_bw("dataRate_", &dataRate_);
>
This is strange: are you sure you
recompiled ns
after changing the files?
Marco
>Messaggio
originale
>Da: [EMAIL PROTECTED]
>Data: 13-giu-2006
12.52 AM
>A:
>Ogg: [ns] Autorate in 802.11G
>
>
>
>Hello.
>
>I´m working on 802.11g in ns-2.28. I need to make automatic
>change in dataRate depending in distance between tow nodes.
>
>I tried
to make some changes on the on the mac-802_11.h and
>in the mac-802_11.
cc but they did not worked for me.
>
>I make some other changes in ns-
default.tcl and ns-mac.tcl
>for make that the 802.11g standard work in
ns-2.28, this
>changes were succesful.
>
>In order to make the
automatic change in dataRate I tried to
>make some changes in mac-
802_11.cc:
>
> Packet *p = Packet::alloc();
>
> struct hdr_cmn *ch =
HDR_CMN(p);
> struct hdr_mac802_11 *dh =
HDR_MAC802_11(p);
> struct hdr_arp *ah = HDR_ARP(p);
>
>
double tX_,tY_,tZ_,rX_,rY_,rZ_;
> nsaddr_t txid=index_;
>
nsaddr_t rxid;
>
> MobileNode *tx_node= (MobileNode*)(Node::
get_node_by_address(txid));
> tx_node->getLoc(&tX_,&tY_,&tZ_);
>
> ch->tX()=tX_;
> ch->tY()=tY_; ch->tZ()=tZ_;
>
> if (strcmp(packet_info.name(ch->ptype()), "ARP") == 0)
> rxid=ah->arp_tpa;
> else
> rxid=ETHER_ADDR(dh->dh_ra);
>
> MobileNode *rx_node= (MobileNode*)(Node::
get_node_by_address(rxid));
> rx_node->getLoc(&rX_,&rY_,&rZ_);
> dist
= sqrt((rX_ - tX_) * (rX_ - tX_) + (rY_ - tY_) * (rY_ - tY_) +
>(rZ_
- tZ_) * (rZ_ - tZ_));
>
>
> // End of
modification
>
>
> Tcl& tcl = Tcl::instance();
> tcl.evalf("Mac/802_11
set basicRate_");
> if (strcmp(tcl.result(), "0") != 0)
> bind_bw("basicRate_", &basicRate_);
> else
> basicRate_ =
bandwidth_;
>
>
> tcl.evalf("Mac/802_11 set dataRate_");
>if (strcmp(tcl.result(), "0") != 0)
> bind_bw
("dataRate_", &dataRate_);
>
> //Modification to obtain dataRate VS
distance by Jonathan Lopez
>
> else if (dist<=100 & dist>77)
>
>
dataRate_ = 1*1e6;
> else if (dist<=77 & dist>65)
> dataRate_ =
2*1e6;
> else if (dist<=65 & dist>57)
> dataRate_ = 6*1e6;
> else
if (dist<=57 & dist>54)
> dataRate_ = 9*1e6;
> else if (dist<=54 &
dist>50)
> dataRate_ = 12*1e6;
> else if (dist<=50 & dist>42)
>
dataRate_ = 18*1e6;
> else if (dist<=42 & dist>35)
> dataRate_ =
24*1e6;
> else if (dist<=35 & dist>23)
> dataRate_ = 36*1e6;
> else
if (dist<=23 & dist>19)
> dataRate_ = 48*1e6;
> else
> dataRate_ =
bandwidth_;
>
>
> // End of modification
>
>EOTtarget_ = 0;
>bss_id_ = IBSS_ID;
> //printf("bssid in constructor %d\n",
bss_id_);
>}
>
>
>Here I just tried to change dataRate depending the
distance
>between the nodes, for make the change for every packet that
>is send.
>
>However this modification is not working, I see that every
>time the
> dataRate is at 54Mbps, including if I comment
>every line
that define the dataRate, including the lines
>
> tcl.evalf("Mac/802_11
set dataRate_");
>if (strcmp(tcl.result(), "0") != 0)
> bind_bw("dataRate_", &dataRate_);
>
>I can modify the dataRate with
Mac/802_11 set dataRate_ xMb
>in my tcl script. But I need that the
dataRate been modified
>for every packet that is send denpending in the
distance.
>
>Can anyone tell me what is happend or how can I do the
>modifications that I need?.
>
>Thanks.
>
>
__
>Correo Yahoo!
>Espacio para todos tus mensajes, antivirus y antispam ¡gratis!
>Regístrate ya - http://correo.yahoo.com.mx/
>
[ns] R: Turn Nodes on/off
Hi, assuming that "violación de segmento" translates into "segment fault", this error is very often caused by a NULL pointer. I.e. look into your code for pointers, and check that you never fall in the case p->something, where p is NULL. regards, Marco Fiore >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 21-giu-2006 4.11 PM >A: >Ogg: [ns] Turn Nodes on/off > > >We have a system working and now we are trying to introduce an node on/off >file. Unfortunately we are the following errors: > > > >Load File onoff1 complete. > >NS-2 STARTS Simulation of prueba2.tcl > >Violación de segmento > > > >Can any one help us?? > > > > > >
[ns] R: Movements in wireless scenario
Andrea, god is only used for statistical purposes. If you are interested in generating nodes movement simply use the 'setdest' command, ignoring god. E.g. $ns_ at 10.0 "$node_(0) setdest X Y S" where X,Y are the coords of destination and S is the speed (in m/s). bye, Marco >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 24-giu-2006 10.59 AM >A: "ns-users" >Ogg: [ns] Movements in wireless scenario > > >Hi >I want to introduce movements in my wireless simulations (I'm using >UM-OLSR), and for large numbers of nodes and movements I'm using SETDEST ( >ns-2.29\indep-utils\cmu- scen-gen\setdest). An example of what this utility >makes is following: > >"$node_(12) set X_ 365.446284881986 >$node_(12) set Y_ 72.300575449718 >$node_(12) set Z_ 0. >$god_ set-dist 0 1 16777215 >$god_ set-dist 0 2 16777215 >$god_ set-dist 0 3 16777215 >$god_ set-dist 0 4 16777215 >$god_ set-dist 0 5 16777215 >$god_ set- dist 0 6 16777215 >$god_ set-dist 0 7 16777215" > > >I don't know how to implement SETDEST's movement because I don't know how to >define "god_" variable, can you help me? > >Thank you very much, I'm sorry for my poor english. >Andrea >
[ns] Verbose simulation errors
Hi,
some days ago (probably after a recompile, but I am not sure about
that),
my installation of ns-2 became 'mute' in presence of errors.
That is, previously it exited saying 'Segmentation fault', or printing
something
like (just an example!):
--
(_o38 cmd line 1)
invoked from within
"_o38 cmd set-datarate 11Mb"
invoked from within
"catch "$self cmd $args" ret"
invoked from
within
"if [catch "$self cmd $args" ret] {
set cls [$self info class]
global errorInfo
set savedInfo $errorInfo
error "error when calling
class $cls: $args" $..."
(procedure "_o38" line 2)
(SplitObject
unknown line 2)
invoked from within
"[$BS(0) set mac_(0)] set-
datarate $opt(datarate)"
(file "main.tcl" line 193)
--
Now, it simply exits without printing any info on the possible cause
of the error! I did not change the Makefile, nor I added strange
compilation flags...
I do not understand how I can turn ns-2 exiting to
a 'verbose' mode
again, so that information on the cause of the error
are shown again
when simulation stops. Does anyone knows the reason and
the solution?
Any help is appreciated!
Marco
[ns] R: RTSThreshold in Simulations
Alicia, RTS/CTS is used when frame size is greater than the RTS threshold. So you should act on the RTS threshold value to set RTS/CTS on or off. Marco >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 3-lug-2006 1.31 PM >A: >Ogg: [ns] RTSThreshold in Simulations > > >Hello guys: > >I wonder if you activate the RTS/CTS in simulations for MANET. Does it >depend on the packet size or on the number of neighbors? > >Thanks in advance, > > >Alicia Triviño / Tl. +34-95.213.71.91 >Dpto. Tecnologia Electronica >E.T.S. Ing. Telecomunicacion >Universidad de Malaga >Campus Universitario de Teatinos >29071 Malaga, Spain > > >
[ns] ns-2 wireless update patch avaialble
Hi all, I'd like to inform the ns-2 users community of the release of a patch improving the original ns-2 support for wireless simulations. The patch groups freely available contributions provided by Wu Xiuchao, Ratish J. Punnoose, David X. Wei and Felix Schmidt-Eisenlohr, adapted to ns-2.29, plus original contribution. The patch adds the following features to ns-2.29: - realistic channel propagation - ricean propagation model - SNOOPy calendar scheduler - several 802.11 bug fixes - mulitple data transmission rates support - Adaptive Auto Rate Fallback (AARF) The AARF algorithm was designed by the Planete research group at INRIA. Full references and installation instructions can be found in the included read.me file. An example Tcl script to test the patch is provided. The patch is available for download at http://www. reti.polito.it/fiore Regards, Marco Fiore
[ns] R: Ending the simulation after a transfer is finished
Prateek, setting the finish time to a high value should not cause any harm, nor should it make you wait more. Since ns-2 is an event-driven simulator, once no event is scheduled the time shall move directly to the 'end of simulation' event, in no (user) time. I don't know if other better solutions exist, though. Marco >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 4-lug-2006 12.53 PM >A: >Ogg: [ns] Ending the simulation after a transfer is finished > > >Hi, > >Is there a way to end the simulation just after a transfer is finished and >not by specifying a time on which to end it. For e.g.: my script has a line: > >$ns at 5.0 "$ftp send 6000" > >Where ns is a network simulator object and ftp is an ftp application object. >Now, I don't know at what time will this transfer be over. So, I can't have >a line which says: > >$ns at 10.0 "finish" > >I also don't want to use a big number for the time over there because that >will mean unnecessary waiting in most cases. > >Is there a way to end the simulation when $ftp is over with its transfer? In >other words, is there a way to know the time when a transfer will be over? > >Thanks, >Prateek Singhal > >-- >Prateek Singhal | mailto:singhal. [EMAIL PROTECTED] >
[ns] R: Re: R: Ending the simulation after a transfer is finished
Prateek, unfortunately, I think you are right... Marco > Messaggio originale >Da: [EMAIL PROTECTED] >Data: 4-lug- 2006 1.27 PM >A: >Cc: "Marco Fiore"<[EMAIL PROTECTED] it> >Ogg: Re: R: [ns] Ending the simulation after a transfer is finished > >Hi Marco, > >I think this does not hold if the Scheduler type is Realtime, right? I >should have mentioned that earlier :( > >Prateek > >On 7/4/06, Marco Fiore <[EMAIL PROTECTED]> wrote: >> >> Prateek, >> >> setting the finish time to a high value should not cause any >> harm, nor should it make you wait more. >> Since ns-2 is an event-driven >> simulator, once no event is scheduled the time shall move directly to >> the >> 'end of simulation' event, in no (user) time. >> >> I don't know if >> other better solutions exist, though. >> >> Marco >> >> >Messaggio >> originale >> >Da: singhal. [EMAIL PROTECTED] >> >Data: 4-lug-2006 12.53 PM >> >A: <[EMAIL PROTECTED] EDU> >> >Ogg: [ns] Ending the simulation after a >> transfer is finished >> > >> > >> >Hi, >> > >> >Is there a way to end the simulation >> just after a transfer is finished and >> >not by specifying a time on >> which to end it. For e.g.: my script has a line: >> > >> >$ns at 5.0 "$ftp >> send 6000" >> > >> >Where ns is a network simulator object and ftp is an ftp >> application object. >> >Now, I don't know at what time will this transfer >> be over. So, I can't have >> >a line which says: >> > >> >$ns at 10.0 "finish" >> > >> >I also don't want to use a big number for the time over there because >> that >> >will mean unnecessary waiting in most cases. >> > >> >Is there a way to >> end the simulation when $ftp is over with its transfer? In >> >other >> words, is there a way to know the time when a transfer will be over? >> > >> >Thanks, >> >Prateek Singhal >> > >> >-- >> >Prateek Singhal | mailto:singhal. >> [EMAIL PROTECTED] >> > >> >> >> > > >-- >Prateek Singhal | mailto:[EMAIL PROTECTED] >
[ns] R: 802.11 dynamic bit rate change
Guillermo, ns-2 does not offer native support for such phenomenon. You can have a look at the patch at www.reti.polito.it/fiore which adds realistic propagation and ARF support. Marco >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 11-lug-2006 11.50 AM >A: "Ns Users" >Ogg: [ns] 802.11 dynamic bit rate change > > >Hi, > >In real 802.11b and 802.11g wireless cards the bit rate changes dynamically >depending on the channel conditions. If the card is working at 54Mbps and >is receiving no ACK's from the receiver it will automatically switch to a >lower bit rate. Modulations used by lower bit rates are stronger against >errors, so the link may improve its performance at a lower speed (at least >some packets will arrive). There are some algorithms that rule the bit rate >such as the one used by the mad-wifi driver for atheros chips. >I would like to simulate this behavior in ns2. I'm new using ns2 and I was >not able to find the code which simulates this behaviour, is this feature >implemented on ns2? Is anybody else interested on this topic? > >Thanks, > >Guillermo >
[ns] R: Calculating Mean end-to-end delay.
Nicholas, I think the right way would be: mean = [mean * (total_pkts- 1) + curr_pkt_delay] / total_pkts where total_pkts represents the number of packets received, including the current one (i.e., that determining the curr_pkt_delay contribution). Regards, Marco > Messaggio originale >Da: [EMAIL PROTECTED] >Data: 17- lug-2006 3.06 AM >A: >Ogg: [ns] Calculating Mean end- to-end delay. > > >Hello, > >i have created an agent which allows me to record the end-to-end delays of >packets arriving at a specific node. What i want to do is to calculate the >mean end-to-end delay at specific time intervals and later on output it on a >trace file. > >To calculate the mean end-to-end delay i use the following: > >mean= (mean+curr_pkt_delay)/total_pkts. > >I do this every time a new packet arrives. > >Is this the correct way of calculating mean end-to-end delay or i am totally >wrong here? > >Regards, > >-- >Nicholas Loulloudes > >Postgraduate at Communication Networks and Software. > >BSc in Computer Science. >
[ns] R: how to implement DCF in NS2
Hi, if you mean 802.11 DCF, it is already implemented. See the ns manual. bye, Marco >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 22-lug-2006 5.40 PM >A: >Ogg: [ns] how to implement DCF in NS2 > > >Hi > I want to implement DCF in NS2, can anybody help me in this regard. > > thank you very much. > > BYE > > >- >See the all-new, redesigned Yahoo.com. Check it out. >
[ns] R: How to generate ocean node movement for wireless scenarios
Hi, look for references to the 'setdest' command, which allows you to define nodes movements during simulation. Marco >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 30-ago-2006 7.02 PM >A: >Ogg: [ns] How to generate ocean node movement for wireless scenarios > > >Hi all, > i'm trying to generate a scenario for node movement in an ocean >environment. I've got a sets of data that is assocated with time, Longitude, >Latitude, velocity ( U (cm/s) & V (cm/s)). Can anyone advice me how this can >be done? > >Thanks, >Kwang Yong > > >
[ns] R: Re: Measuring physical data rate for wireless medium
Hi, you could have a look at the wireless patch at http://www.reti. polito.it/fiore regards, Marco >Messaggio originale >Da: [EMAIL PROTECTED] >Data: 14-set-2006 8.22 PM >A: "Piyush Agrawal"<[EMAIL PROTECTED]> >Cc: >Ogg: Re: [ns] Measuring physical data rate for wireless medium > > >ns does not currently model such fluctuations (i.e. ARF,RBAR, or OAR). > the data rate used is always the same. > >On 9/14/06, Piyush Agrawal wrote: >> >> Hi all, >> >> I wish to implement a feature for 802.11, in which I need to know the >> current physical data rate of the wireless medium form the C++ code. I know >> that in the real world scenario, the data rate fluctuates. Does ns model >> such fluctuations and can the changing rates be measured? >> >> Thanks, >> Piyush >> >> -- >> Piyush Agrawal >> 4th Year Undergraduate Student, >> Department of Computer Science & Engineering, >> IIT Kanpur, India >> > >
