[ns] why does the code below doesn't work as expected
Hi
In the below code whatever Mac/802_11 parameters I set are not taking
effect. For instance eventhough I set _dataRate 11mbps, throughput is
coming around 400kbps, which is the default rate for udp. If I change
_dataRate, basicRate_ or PLCPDataRate_ , there is absolutely no effect.
Please if anyone can help, because I require them in my work.
Thanks in advance,
regards,
Sandeep.
1 set val(chan) Channel/WirelessChannel;# channel type
2 set val(prop) Propagation/TwoRayGround ;#
radio-propagation model
3 set val(netif) Phy/WirelessPhy;# network
interface type
4 set val(mac) Mac/802_11 ;# MAC type
5 set val(ifq) Queue/DropTail/PriQueue;# interface queue
type
6 set val(ll)LL ;# link layer type
7 set val(ant) Antenna/OmniAntenna;# antenna model
8 set val(ifqlen)50 ;# max packet in ifq
9 set val(nn)2 ;# number of
mobilenodes
10 set val(rp)DSDV ;# routing protocol
11 set val(x) 800
12 set val(y) 800
13
14 Phy/WirelessPhy set bandwidth_ 11Mb
15
16 Mac/802_11 set SlotTime_ 0.20;# 20us
17 Mac/802_11 set SIFS_ 0.10;# 10us
18 Mac/802_11 set PreambleLength_144 ;# 144 bit
19 Mac/802_11 set PLCPHeaderLength_ 48 ;# 48 bits
20 Mac/802_11 set PLCPDataRate_ 1.0 ;# 1Mbps
21 Mac/802_11 set dataRate_ 11.0 ;# 11Mbps
22 Mac/802_11 set basicRate_ 1.0 ;# 1Mbps
23
24 set ns [new Simulator]
25 set tr [open trace.tr w]
26 $ns trace-all $tr
27 set na [open trace.nam w]
28 $ns namtrace-all-wireless $na $val(x) $val(y)
29 set chan1 [new $val(chan)]
30 set topo [new Topography]
31 $topo load_flatgrid 500 500
32 create-god 2
33
34 proc finish {} {
35global ns tr na
36$ns flush-trace
37$ns nam-end-wireless [$ns now]
38close $tr
39close $na
40exec nam trace.nam &
41exit 0;
42 }
43
44 $ns node-config -adhocRouting $val(rp)\
45 -llType $val(ll) \
46 -macType $val(mac) \
47 -antType $val(ant) \
48 -propType $val(prop) \
49 -phyType $val(netif) \
50 -channel $chan1 \
51 -topoInstance $topo \
52 -agentTrace ON \
53 -routerTrace ON \
54 -macTrace ON \
55 -movementTrace OFF\
56 -ifqType $val(ifq) \
57 -ifqLen $val(ifqlen)
58
59 for {set i 0} {$i < 2} {incr i} {
60 set node_($i) [$ns node]
61 $node_($i) random-motion 0
62 }
63
64 $node_(0) set X_ 0
65 $node_(0) set Y_ 0
66 $node_(0) set Z_ 0
67 $node_(1) set X_ 10
68 $node_(1) set Y_ 0
69 $node_(1) set Z_ 0
70
71 $node_(0) color green
72 $node_(1) color green
73
74 set udp [new Agent/UDP]
75 set des [new Agent/Null]
76 $ns attach-agent $node_(0) $udp
77 $ns attach-agent $node_(1) $des
78 $ns connect $udp $des
79
80 set udapp [new Application/Traffic/CBR]
81 $udapp attach-agent $udp
82 $udapp set fid_ 1
83 $udapp set packetSize_ 400
84
85 $ns at 1.0 "$udapp start"
86 $ns at 30.0 "$udapp stop"
87 $ns at 30.0 "$ns halt"
88 ns at 30.0 "finish
89 $ns run"
Re: [ns] segmentation fault in mpeg4_traffic
Dear Renata and Daniele, I did as directed by Daniele. The file in my directory "video_model" were saved as *.txt files by mozilla. Whereas, the mpeg4_traffic.cc was looking for just file '*' without any extension. So I renamed the file. And now the program compiles. Thanks and regards, Vinod Kumar On Tue, 2006-08-29 at 22:03, Renata Vidal wrote: > Vinod, > > Did you get rid of this problems? What operational system you are using? > > Thanks in advance, > > Renata > > On 28 Aug 2006 13:17:58 +0530, Vinod Kumar On Tue, 2006-08-29 at 22:37, Daniele wrote: > > On 29 Aug 2006 17:31:40 +0530, Vinod Kumar > <[EMAIL PROTECTED]> wrote: > [..snip..] > > your tcl code works in my installation, so i think you miss to add > that directory in the current where you execute the simulation. > It should look like: > ls simulation/ > mpeg.tcl video_model > > and with > ls simulation/video_model/ > Bmodel_hist_1 Bmodel_inv_1 Imodel_hist_1 Imodel_inv_1 > Pmodel_hist_1 Pmodel_inv_1 > > Check it out > > -- > Daniele >
[ns] How to make simplex-link down ?
Hi everybody , I am trying to make a simplex-link down . I tried the same as what the duplex link does but it ends up in error. Anybody has any idea to know what has to be done extra to make a simplex-link down..? Thanks in advance . Mouli.
[ns] segmentation fault
Hi All...
I am running a simulation of ad hoc replication based on clustering ,using
AODV protocol , and every time I try to run the simulation I get a
segmentation fault.
is there any one who can tell me why this error happened and what is it ?
here is the TCL script:
# ==
# Define options
# ==
set opt(chan) Channel/WirelessChannel;# channel type
set opt(prop) Propagation/TwoRayGround ;# radio-propagation
model
set opt(netif) Phy/WirelessPhy;# network interface type
set opt(mac)Mac/802_11 ;# MAC type
set opt(ifq)Queue/DropTail/PriQueue;# interface queue type
set opt(ll) LL ;# link layer type
set opt(ant)Antenna/OmniAntenna;# antenna model
set opt(ifqlen) 50 ;# max packet in ifq
set opt(nn) 14 ;# number of mobilenodes
set opt(adhocRouting) AODV ;# routing protocol
set opt(cp) "" ;# connection pattern
file
set opt(sc) "./scene-14-cluster" ;# node movement file.
set opt(x) 670;# x coordinate of topology
set opt(y) 670;# y coordinate of topology
set opt(seed) 0.0;# seed for random number
gen.
set opt(stop) 100;# time to stop simulation
#
# check for boundary parameters and random seed
if { $opt(x) == 0 || $opt(y) == 0 } {
puts "No X-Y boundary values given for wireless topology\n"
}
if {$opt(seed) > 0} {
puts "Seeding Random number generator with $opt(seed)\n"
ns-random $opt(seed)
}
# create simulator instance
set ns_ [new Simulator]
# set up for hierarchical routing
$ns_ node-config -addressType hierarchical
AddrParams set domain_num_ 1 ;# number of domains
lappend cluster_num 3;# number of clusters in each domain
AddrParams set cluster_num_ $cluster_num
lappend eilastlevel 4 5 5 ;# number of nodes in each cluster
AddrParams set nodes_num_ $eilastlevel ;# of each domain
set tracefd [open cluster14-out.tr w]
set namtrace [open cluster14-out.nam w]
$ns_ trace-all $tracefd
$ns_ namtrace-all-wireless $namtrace $opt(x) $opt(y)
# Create topography object
set topo [new Topography]
# define topology
$topo load_flatgrid $opt(x) $opt(y)
# create God
create-god [expr $opt(nn)]
set channel1 [new $opt(chan)]
# configure for base-station node
$ns_ node-config -adhocRouting $opt(adhocRouting) \
-llType $opt(ll) \
-macType $opt(mac) \
-ifqType $opt(ifq) \
-ifqLen $opt(ifqlen) \
-antType $opt(ant) \
-propType $opt(prop) \
-phyType $opt(netif) \
-channel $channel1 \
-topoInstance $topo \
-wiredRouting OFF \
-agentTrace ON \
-routerTrace ON \
-macTrace ON
#create base-station node
set temp {0.0.0 0.0.1 0.0.2 0.0.3 0.1.0 0.1.1 0.1.2 0.1.3 0.1.4 0.2.0 0.2.1
0.2.2 0.2.3 0.2.4}
;# hier address to be used for wireless
;# domain
# create mobilenodes in the same domain as BS(0)
# note the position and movement of mobilenodes is as defined
# in $opt(sc)
#configure for mobilenodes
$ns_ node-config -wiredRouting OFF
for {set j 0} {$j < $opt(nn)} {incr j} {
set node_($j) [ $ns_ node [lindex $temp $j]]
}
# Traffic
set ping_(0) [new Agent/Ping]
$ns_ attach-agent $node_(6) $ping_(0)
set ping_(1) [new Agent/Ping]
$ns_ attach-agent $node_(5) $ping_(1)
#Connect the two agents
$ns_ connect $ping_(0) $ping_(1)
#Schedule events
$ns_ at 5.0 "$ping_(0) send0"
$ns_ at 6.0 "finish"
# source connection-pattern and node-movement scripts
if { $opt(cp) == "" } {
puts "*** NOTE: no connection pattern specified."
set opt(cp) "none"
} else {
puts "Loading connection pattern..."
source $opt(cp)
}
if { $opt(sc) == "" } {
puts "*** NOTE: no scenario file specified."
set opt(sc) "none"
} else {
puts "Loading scenario file..."
source $opt(sc)
puts "Load complete..."
}
# Define initial node position in nam
for {set i 0} {$i < $opt(nn)} {incr i} {
# 20 defines the node size in nam, must adjust it according to your
# scenario
# The function must be called after mobility model is defined
$ns_ initial_node_pos $node_($i) 20
}
# Tell all nodes when the simulation ends
for {set i } {$i < $opt(nn) } {incr i} {
$ns_ at $opt(stop).0 "$node_($i) reset";
}
$ns_ at $opt(stop).0002 "puts \"NS EXITING...\" ; $ns_ halt"
$ns_ at $opt(stop).0001 "stop"
proc stop {} {
global ns_ tracefd namtrace
$ns_
[ns] change the CBR bit rate
Hi all, How can I change (increase or decrease ) the Traffic bit rate during the simulation, I mean at the c++ programme. Thanks Firas
[ns] CFP: Workshop on ns-2
Note: in general, we would like to avoid the use of ns-users for CFP announcements. But we make exception to allow CFPs and workshop announcements that deal specifically with ns-2, such as the below. Tom == CALL FOR PARTICIPATION WNS2 WORKSHOP ON NS-2: THE IP NETWORK SIMULATOR PISA, ITALY -- OCTOBER 10, 2006 http://www.wns2.org/ == Organized in conjunction with the VALUETOOLS 2006 Conference In technical cooperation with the IEEE Computer Society (approval pending) Jointly sponsored by the EU (IST-FET), Create-Net, the International Communication Sciences and Technology Association (ICST) and the Groupe des Ecoles des Telecommunications (GET) IMPORTANT DATES ___ Early Registration Deadline: SEPTEMBER 11, 2006 WNS2 Workshop: OCTOBER 10, 2006 VALUETOOLS Conference Sessions: OCTOBER 11-13, 2006 SCOPE - In recent years, the ns-2 simulator has become one of the de facto standards (if not the standard) for the simulation of packet-switched networks, as attested by the number of research papers and IETF documents based on it, as well as by the wide scope of the networking technologies it handles. It is widely used in both academia and industry as a means of designing, testing and evaluating new and existing protocols and architectures, and it is also a very useful tool for educational purposes. The Workshop on ns-2 (WNS2) is a one-day event held in conjunction with VALUETOOLS, the First International Conference on Performance Evaluation Methodologies and Tools (http://www.valuetools.org/). The workshop devotes special interest to the future evolution of ns-2 and the upcoming ns-3 simulator, and its extension in novel research areas and networking technologies and scenarios. INVITED TALK "Maintaining a Critical Attitude towards Simulation Results", by Sally Floyd, ICSI Center for Internet Research (ICIR), Berkeley, USA. (ADVANCE) TECHNICAL PROGRAM --- Please check: http://www.wns2.org/techprog.htm for the most up-to-date version of the program. VENUE - WNS2 will be hosted by the University of Pisa, at the CNR research area (via G. Moruzzi, 1 -- Pisa, Italy). You can download a map of Pisa showing the location of the workshop, the railway station and Piazza dei miracoli (where the Leaning tower is) here: http://www.valuetools.org/Venues.pdf For more information on how to get there, accommodation, etc., please check: http://www.wns2.org/ REGISTRATION You may register for the WNS2 workshop at the main VALUETOOLS registration web page: https://icst.org/registration/reg_valuetools_2006.php Reduced registration fees are available for students and members of the following institutions: IEEE, ACM, INRIA, CNR, University of Pisa and CREATE-NET. TECHNICAL PROGRAM COMMITTEE --- Co-chairs: Tania Jimenez (LIA, France) David Ros (GET / ENST Bretagne, France) Committee members: Eitan Altman(INRIA Sophia Antipolis, France) Chadi Barakat (INRIA Sophia Antipolis, France) Armando Caro Jr.(BBN Technologies, USA) Thierry Ernst (Keio University, Japan) Sonia Fahmy (Purdue University, USA) Andrei Gurtov (Helsinki Institute for Information Technology, Finland) Qi He (IBM, USA) Polly Huang (National Taiwan University, Taiwan) Tom Henderson (University of Washington, USA) Kun-chan Lan(NICTA, Australia) Saverio Mascolo (Politecnico di Bari, Italy) Nicolas Montavont (GET / ENST Bretagne, France) Giorgio Tonella (USI, Switzerland) Michael Welzl (Leopold-Franzens-University of Innsbruck, Austria) Lloyd Wood (Cisco, UK)
Re: [ns] again PHY - MAC interaction: RXThresh_ ???
check in the recv_timer() function
http://www.ece.rice.edu/~jpr/ns/docs/802_11.html#recv_timer()
On 8/29/06, Utente ns2 <[EMAIL PROTECTED]> wrote:
>
> Dear friends,
>
> look at the following code , extracted from the file wireless-phy.cc :
>
> if(propagation_) {
> s.stamp((MobileNode*)node(), ant_, 0, lambda_);
> Pr = propagation_->Pr(&p->txinfo_, &s, this);
> if (Pr < CSThresh_) { // This is the sensitivity of the
> wireless card
> pkt_recvd = 0;
> goto DONE;
> }
> if (Pr < RXThresh_) {
> /*
> * We can detect, but not successfully receive
> * this packet.
> */
> hdr_cmn *hdr = HDR_CMN(p);
> hdr->error() = 1;
> }
> }
>
> One question about RXThresh_:
> if CSThresh_ < Pr < RXThresh_ we have that:
> A. pkt_recvd = 1 (the packet will be sent to the MAC Layer - thank you
> again, Joshua :-) )
> B: the packet is marked with hdr->error() = 1 .
> In the case Pr > RXThresh_ we will have that:
> A. pkt_recvd = 1 (the packet will be sent to the MAC Layer)
> B. hdr->error() is untouched, it is equal to 0
>
> So, the only difference introduced in the status of the packet by the
> RXThreshold is the flag 0/1 in the common header field.
>
> What I haven't understood is how MAC treats the above different kind of
> packets.
> It seems that at MAC level no difference is done between packet with
> hdr->error() = 0 and hdr->error() = 1.
> My guess is that once again the solution is in some inherited classes... but
> I really cannot see where...
>
> I hope you can give me some hints.
>
> Regards,
>
> Pasquale
>
> _
> MSN Amor: busca tu ½ naranja http://latam.msn.com/amor/
>
>
Re: [ns] segmentation fault in mpeg4_traffic
On 29 Aug 2006 17:31:40 +0530, Vinod Kumar <[EMAIL PROTECTED]> wrote: [..snip..] your tcl code works in my installation, so i think you miss to add that directory in the current where you execute the simulation. It should look like: ls simulation/ mpeg.tcl video_model and with ls simulation/video_model/ Bmodel_hist_1 Bmodel_inv_1 Imodel_hist_1 Imodel_inv_1 Pmodel_hist_1 Pmodel_inv_1 Check it out -- Daniele
Re: [ns] ns2 Validation Testing
On 8/29/06, Sally Floyd <[EMAIL PROTECTED]> wrote: > > > > As I understand these directories contain a reference / standard > > output as *should* be produced from the tests. But how are these files > > generated in the first place? > > The files are generated the first time the test is run, assuming that > the > validation test uses the standard format of the "test-all-???" files > in tcl/test. That is, the validation test uses "test-all-template1". But how do we know that the first test itself produced the correct traces? I think I should rephrase my question: - are these test suites meant to validate the implementation of the protocol itself - or are they to ensure that the same trace output is generated on different platforms? Thanks for your reply. Regards Abhijeet
[ns] again PHY - MAC interaction: RXThresh_ ???
Dear friends,
look at the following code , extracted from the file wireless-phy.cc :
if(propagation_) {
s.stamp((MobileNode*)node(), ant_, 0, lambda_);
Pr = propagation_->Pr(&p->txinfo_, &s, this);
if (Pr < CSThresh_) { // This is the sensitivity of the
wireless card
pkt_recvd = 0;
goto DONE;
}
if (Pr < RXThresh_) {
/*
* We can detect, but not successfully receive
* this packet.
*/
hdr_cmn *hdr = HDR_CMN(p);
hdr->error() = 1;
}
}
One question about RXThresh_:
if CSThresh_ < Pr < RXThresh_ we have that:
A. pkt_recvd = 1 (the packet will be sent to the MAC Layer - thank you
again, Joshua :-) )
B: the packet is marked with hdr->error() = 1 .
In the case Pr > RXThresh_ we will have that:
A. pkt_recvd = 1 (the packet will be sent to the MAC Layer)
B. hdr->error() is untouched, it is equal to 0
So, the only difference introduced in the status of the packet by the
RXThreshold is the flag 0/1 in the common header field.
What I haven't understood is how MAC treats the above different kind of
packets.
It seems that at MAC level no difference is done between packet with
hdr->error() = 0 and hdr->error() = 1.
My guess is that once again the solution is in some inherited classes... but
I really cannot see where...
I hope you can give me some hints.
Regards,
Pasquale
_
MSN Amor: busca tu ½ naranja http://latam.msn.com/amor/
Re: [ns] how to add secod interface to node
Hi, Hope this can help you: http://www.cse.msu.edu/~wangbo1/ns2/nshowto8.html Best, Bo On 28 Aug 2006 08:34:00 +0200, Przemysław Krekora <[EMAIL PROTECTED]> wrote: > > > > Hello, > > I want to create a node with two or three interfaces. Could you tell me > how to add the second interface to node > > Best regards > Przemyslaw Krekora > >
[ns] Is it possible to create Agent which will be able to accept all type of them
Hello I want to implement firewall and i readed in documentation and of course in code, that constructor of Agent class need type of packet. What i need to do if I want accept all kind of packets for example tcp and udp Thanks for any information Przemysław Krekora
Re: [ns] ns-802.11e EDCF installation problem
Use This http://www.tkn.tu-berlin.de/research/802.11e_ns2/ It works Sebastián Guazzini Córdoba - Argentina - Original Message - From: "mayank kanthali" <[EMAIL PROTECTED]> To: "nsuser" Sent: Friday, August 18, 2006 6:29 AM Subject: [ns] ns-802.11e EDCF installation problem > > Hi all, > i was trying to install ns-802.11e EDCF for IEEE > 802.11e > Wireless LAN. I found this pakage from web site > http://www-sop.inria.fr/planete/qni/Research.html#ns > > when I run the command "make install" , I got the > countless error like ... > plm/loss-monitor-plm.o(.text+0xf2): In function > `PLMLossMonitor::PLMLossMonitor[in-charge]()': > : undefined reference to `TclObject::bind(char const*, > double*)' > undefined reference to `TclObject::bind(char const*, > double*)' > tfrc-sink.o(.text+0x22d): In function > `TfrcSinkAgent::TfrcSinkAgent[not-in-charge]()': > : undefined reference to `TclObject::bind(char const*, > int*)' > > so please help to get rid of those installation > problem > its very very urgent. > > thanking you > > waiting for response... > > > __ > Do You Yahoo!? > Tired of spam? Yahoo! Mail has the best spam protection around > http://mail.yahoo.com > >
[ns] Parameter settings in TKNs 802.11e model
Hi everybody, Is there anybody who now how to change the parameter settings in TKNs 802.11e model? Can the parameters be changed in TCL code or must it be changed in .cc files? best regards Frank Roar Mjøberg
Re: [ns] PHY - MAC interactions in wireless nodes
Thank you very much, Joshua. Your hint has been really very useful. Pasquale >From: "Joshua Robinson" <[EMAIL PROTECTED]> >To: "Utente ns2" <[EMAIL PROTECTED]> >CC: ns-users@isi.edu >Subject: Re: [ns] PHY - MAC interactions in wireless nodes >Date: Mon, 28 Aug 2006 14:18:07 -0500 > >look at the receive() function of the phy class in phy.cc. there you >will see uptarget_->recv() being called if the sendUp() function >returns a non-zero value. this is how the packets are sent to the >MAC. > >and in answer to your other question - I believe the MAC will receive >all packets that are above the carrier sense threshold (CSThresh), >whether it can succesfully decode or not. > >-Joshua > >On 8/28/06, Joshua Robinson <[EMAIL PROTECTED]> wrote: >>look at the receive() function of the phy class in phy.cc. there you >>will see uptarget_->recv() being called if the sendUp() function >>returns a non-zero value. this is how the packets are sent to the >>MAC. >> >>and in answer to your other question - I believe the MAC will receive >>all packets that are above the carrier sense threshold (CSThresh), >>whether it can succesfully decode or not. >> >>-Joshua >> >>On 8/28/06, Utente ns2 <[EMAIL PROTECTED]> wrote: >> > >> > Dear all, >> > >> > I have some doubts concerning the file wireless-phy.cc. >> > I hope you can help me. >> > >> > Lets consider the path from channel to MAC. >> > The physical Layer is just in charge to receive packets from the >>channel and >> > to hand them over the MAC layer. >> > In order to do this a method sendUp is implemented in which some filter >>is >> > considered with corresponding different actions, namely: >> > >> > if the Pr < CSThresh_ --> pkt_recvd = 0; >> > if (CSThresh < Pr < RXThresh_) --> 2 actions: >> > 1. hdr->error() = 1 >> > 2. pkt_recvd = 1. >> > My questions: >> > A. Which packets will be actually passed to the MAC layer? Which >> > requirements in terms of received power must the packets going to MAC >>have? >> > B. Why we consider a variable pkt_recvd if it is just used in the >>method >> > sendUp? To do what? >> > C. In which way do sendUp pass these packets to the MAC? I see no >>methods >> > belonging to MAC invoked by sendUp. >> > >> > Thank you very much >> > >> > Pasquale >> > >> > _ >> > Charla con tus amigos en línea mediante MSN Messenger: >> > http://messenger.latam.msn.com/ >> > >> > >> _ MSN Amor: busca tu ½ naranja http://latam.msn.com/amor/
[ns] Scheduler : Event UID not valid
Hi Everybody, Scheduler : Event UID not valid I am getting this error message while making some changes in ns2 code: First I have created a new Agent & a packet header. Then in order to flood this newly created packet to all the directly connected nodes, I am using a for loop to at the classifier : for (int i = 1; i
