[ns] Directional antenna patch
Hi, Does anyone have the patch needed for simulating directional antennas? I found a link http://mailman.isi.edu/pipermail/ns-users/2004-February/039412.html But, the attachment is no more available. Please do send me the patch or direct me to a link which contains the patch. Thanks much, S.Srivathsan DISCLAIMER: This email (including any attachments) is intended for the sole use of the intended recipient/s and may contain material that is CONFIDENTIAL AND PRIVATE COMPANY INFORMATION. Any review or reliance by others or copying or distribution or forwarding of any or all of the contents in this message is STRICTLY PROHIBITED. If you are not the intended recipient, please contact the sender by email and delete all copies; your cooperation in this regard is appreciated.
[ns] smac multihop test failed
Hello, I ran the test-all-smac-multihop test suite and it failed. The website says that the problem occurs only in WIndows. But I am facing this in SunOS 5.9. Any help will be appreciated. Thanks in advance g_arijit [AT] yahoo [DOT] com "Do the best you can, with what you have, where you are." -- Roosevelt __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
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 ÏÏοÏÏαÏία 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
Re: [ns] NS for performance evaluation
Hi guys, I am just wondering what's d advantge of emulation over simulation or vice versa? I have got some traffic generators (web). Does that mean, I shld go for network emulation? Which one give d best results? Also, how cn I get the simulation model for http, Voip, email, and FTP traffics on NS 2. What's d disadvantage/advantages of using this? I'm sorry 2 bother u, how can make an instance of an http traffic over an IPv6 IP in NS2. (I will appreciate some snippets). Thanx as I look forward to hearing from u. Thnx Lekkie.
[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] I got errors when running the simple-wireless.tcl in ns-2.27, anyone can help me?
Dear all
I am new to NS_2. I run the simple-wireless.tcl of Marc Greis's tutorial in
ns-2.27. Everything works fine. But when I change the TCP agent to the UDP
agent
and change traffic model from FTP to CBR, ns-2 reports errors like following:
num_nodes is set 2
INITIALIZE THE LIST xListHead
Starting Simulation...
channel.cc:sendUp - Calc highestAntennaZ_ and distCST_
highestAntennaZ_ = 1.5, distCST_ = 550.0
SORTING LISTS ...DONE!
ns: _o50 start:
(_o50 cmd line 1)
invoked from within
"_o50 cmd start"
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 "_o50" line 2)
(SplitObject unknown line 2)
invoked from within
"_o50 start"
Anyone has any idea why is so? Thanks very much!
Kai
[ns] how do we define source and destination nodes in adhoc networks
dear all please help me out how to define source and destination nodes for a packet to be sent from any node (I wish to use DSR protocol) . with regards ashutosh - Jiyo cricket on Yahoo! India cricket
Re: [ns] Choosing between Fedora Core4 or FreeBSD for NS-2...
On Fri, 27 Jan 2006, Carlos Alberto Quiroz-Perez wrote: > > > Hi everybody, > > I have two operative systems, Fedora Core4 and FreeBSD. My question is: > On which of them NS-2 works better? > I had less problem configuring NS2 on my FreeBSD machine. Best regards, -Carlton
[ns] ns:scheduler going backwards in DSR
hi all, i got the following message when running ns-2.28 DSR with 50 nodes and 40 sending sources. what causes ns:scheduler going backwards in time? why direction for pkt-flow not specified; Sending pkt up the stack on default? please advise, thank you. warning: Please use -channel as shown in tcl/ex/wireless-mitf.tcl INITIALIZE THE LIST xListHead Loading connection pattern... Loading scenario file... Starting Simulation... SORTING LISTS ...DONE! ns: scheduler going backwards in time from 206.988992 to 0.00. num_nodes is set 50 channel.cc:sendUp - Calc highestAntennaZ_ and distCST_ highestAntennaZ_ = 1.5, distCST_ = 550.0 Direction for pkt-flow not specified; Sending pkt up the stack on default.
[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] mpeg simulation
hi all, can any one tell how mpeg-4 video transfer can be done using SCTP (stream control transmission protocol). if any one have code kindly send me pls , i would be very thankful to them bye On Sun, 29 Jan 2006 Saurin Shah wrote : > >Hi, > >I am working on a project, which requires me to perform a simulation of >sending multicast data packets. The source of the data packets is a server >in Colorado and the group of hosts is spread all over the USA. Since the >hosts are very few in number, I thought of using PIM-SM as the protocol for >the multicast packets. I was wondering, how should I go about to make the >simulation and obtain the simulation results. I would really appreciate if >you could help me with this. Any advise or comments will be of great help. > >Thanks >Regards > >Saurin
Re: [ns] How to disable tracing
Am 30.01.2006 um 10:08 schrieb Hajer FERJANI: > > Hello, > > I've tried to turn off the tracing bu doing in my tcl script : > > set AgentTrace OFF > set RouterTrace OFF > set MacTrace OFF > > But this does not work, I always get a trace file. > Then I tried to comment the following line: > $ns_ trace-all $tracefile > but I get an error and could not execute the script. > > Is there another way to turn OFF the trace feature? This should help you: set tracefile [open /dev/null w] $ns_ trace-all $tracefile regards, Alexander -- Mit freundlichen Grüssen / regards, Alexander Seitz [DG1LXS]
[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] Routing Metric of DSR
Hieee, DSR's routing metric is Minimum Hop, this means that if two routes are discovered to the destination the one with minimum hop count will be selected by the destination node. I'd like to know how is this feature incorporated in DSR i.e how r the routes compared before sending replies. Is it the Random Jitter which allows the routes with lesser hops to b considered and returned in route reply. If not how are the routes in packets compared and why is random jitter used before sending a route reply? Thanking in Advance Venuzian _ Don't just search. Find. Check out the new MSN Search! http://search.msn.com/
[ns] Logical doubt in Ping protocol
Hi, The doubt i have is a logical one. Under the `ns/ns-tutorial folder we have marc greis's tutorial. Here we ping a packet from node0 (say) to node1 thru node2. We maintain a ret field in the packet to maintain its direction. but till the packet reaches node1 we use the c++ to define its movement. nut after it reaches node1 thats its destination, we call the tcl.eval() function. why is this practice? cant we use c++ code itself to handle this movement also? Thanks Ramya
[ns] How to disable tracing
Hello, I've tried to turn off the tracing bu doing in my tcl script : set AgentTrace OFF set RouterTrace OFF set MacTrace OFF But this does not work, I always get a trace file. Then I tried to comment the following line: $ns_ trace-all $tracefile but I get an error and could not execute the script. Is there another way to turn OFF the trace feature? Thanks for your help. Bye.
[ns] How to avoid MAC CALLBACK DROP
Hi all, i noticed that in my wireless simulation there are a lot af DROP MAC CBK, whose caused a very low throughput... What does exactly mean? Is there a way to avoid these drops by fixing some parameters in the tcl script? Thanks a lot. _ Scarica gratuitamente MSN Toolbar! http://toolbar.msn.it/
[ns] Regarding Circle formation
Hi, I want to set the range of the node and the range of the node should be seen by drawing circle around the node. Eg: If a node acts as a server it should show its communication range in NAM animator by drawing circle around it.Is it possible to draw circle for a node if it has 50m communication range. Waiting to hear from you. Dheepa.R - Jiyo cricket on Yahoo! India cricket
[ns] EFFICIENT ROUTING IN MULTIMEDIA TRAFFIC
i want to simulate multimedia in ns2.how can i do this.
[ns] EFFICIENT ROUTING IN MULTIMEDIA TRAFFIC
i want to simulate multimedia in ns2.how can i do this.
[ns] EFFICIENT ROUTING IN MULTIMEDIA TRAFFIC
i want to simulate multimedia in ns2.how can i do this.
