[ns] Change the Size of CTS(NS2) on 802.11
Dear all, Can you change the size of CTS(From 14 to 17)? I really appreciate from incomming Comments. Best Regards Hamid R.Afrancheh Don't pick lemons. See all the new 2007 cars at Yahoo! Autos. http://autos.yahoo.com/new_cars.html
[ns] Routing agent exchange
In an agent I would like to change the routing protocol agent of a
wireless node. I can successfully insert a new routing agent, but I
somehow get a segmentation fault from the old agent:
The following code is executed from the C++ agent (with tcl.evalf()):
set ragent_(0) [new Agent/OLSR 0]
$ns_ attach-agent $node_(0) $ragent_(0)
$ragent_(0) start
$node_(0) set ragent_ $ragent_(0)
foreach dumbagent [Agent/DumbAgent info instances] {
if { [$dumbagent id] == 0} { ;# note: dumbagent has been
modified to save the node id
$dumbagent close
$ns_ detach-agent $node_(0) $dumbagent
break
}}
delete $dumbagent
The new OLSR agent sucessfully starts, however, the old dumbagent seems
not be completely deleted (or detached). Here is the gdb output:
Program received signal SIGSEGV, Segmentation fault.
0x004224fc in PortClassifier::classify ()
(gdb) bt
#0 0x004224fc in PortClassifier::classify ()
#1 0x0041ca2d in Classifier::find ()
#2 0x0041cb74 in Classifier::recv ()
#3 0x004f9d12 in DumbAgent::recv ()
#4 0x0041cba6 in Classifier::recv ()
#5 0x004f9d12 in DumbAgent::recv ()
#6 0x0041cba6 in Classifier::recv ()
(...)
Thanks for your advice,
Ulrich
[ns] how tcp-elfn works
sir/madam I would like to make simulation of ELFN mechanism of G.Holland in ns-2. I came to know from one of the research paper that code of ELFN simulation in ns-2 is made public. Can any one help me to find code. Thank you.
[ns] configuration 2 interfaces (in 2 different channels) with 802.11a and 802.11b
thanks Marcel,
but my demand did not refer to the values that variable statics must
assume (the values they can modify easy), I need help for the
interface set up in tcl languages.
Which are the commands who allow me to shape in way corrected the static
tcl variable for every interface and in every channel from defined me
(chan_a_, chan_b_). And moreover, Where I must put these commands in my
script in way cha the configuration it is valid?
You can help me in this?
thanks for your interest
Elena
(My script is under)
Marcel Castro ha scritto:
Elena and All,
According to some 802.11a cards specification, the basicRate_ for
802.11a and g should be 6 Mbps.
See
http://www.3com.com/products/en_US/detail.jsp?tab=prodspecsku=3CRDAG675Bpathtype=purchase
http://www.3com.com/products/en_US/detail.jsp?tab=prodspecsku=3CRDAG675Bpathtype=purchase.
Could anybody clarify that?
Marcel
On 3/22/07, *Elena Putzolu* [EMAIL PROTECTED]
mailto:[EMAIL PROTECTED] wrote:
Hi ns-users,
In my script I would want set up the Access Point with 2
interfaces in
2 different channels (chan_a,chan_b), one with the standard
802.11a and
the other second standard 802.11b.
Please, I have need help in order to understand if
my configuration is
correct! If isn't, can you give a suggestion to me?
(in my script the configuration of the nodes follows mw-node)
My script:
global val_
set val_(channel) Channel/Wireless;# channel
set val_(propagation) Propagation/TwoRayGround ;#
radio-propagation model
set val_(phy) Phy/WirelessPhy ;# physical layer
set val_(mac) Mac/802_11 ;# mac layer
set val_(ifq) Queue/DropTail/PriQueue ;# interface queue
type
set val_(ll) LL ;# link layer type
set val_(antenna) Antenna/OmniAntenna ;# antenna model
set val_(ifqlen) 50 ;# max packet in ifq
set val_(routing) None;# routing
set val_(nMn) 2
set val_(nAP) 2
set val_(x) 150
set val_(y) 150
set val_(tr) esercizi/out5.tr;# trace file
set val_(namtr) esercizi/out5.nam;# nam trace file
set val_(stopTime)15
set chan_a [new $val_(channel)]
set chan_b [new $val_(channel)]
$ns_ wireless-config -routing$val_(routing) \
-mac$val_(mac) \
-phy$val_(phy) \
-propagation[new $val_(propagation)] \
-topography $topography_ \
-ll $val_(ll) \
-ifq$val_(ifq) \
-ifq-length $val_(ifqlen) \
-antenna$val_(antenna) \
-xyz-trace on \
-ifq-trace on \
-mac-trace on \
-rtm-trace on \
-eot-trace off
#---portal node
$ns_ node-config -wireless +Portal ;# enable Portal support
for {set i 0} {$i$val_(nAP)} {incr i} { ;#ACCESS POINT
$ns_ wireless-config -channel $chan_a
set node_AP($i) [$ns_ node 1.[expr $i+1].0]
$node_AP($i) set-position [expr 100.0*$i*$i ] 100.0 0.0
set netif_a($i) [$node_AP($i) add-interface Wireless] ;# add
wireless interface
##802.11a
set mac_a($i) [new $val_(mac)]
$mac_a($i) set SlotTime_ 0.50;# 50us
$mac_a($i) set SIFS_ 0.28;# 28us
$mac_a($i) set PreambleLength_0;# no preamble_
$mac_a($i) set PLCPHeaderLength_ 128 ;# 128 bits
$mac_a($i) set PLCPDataRate_ 1.0e6 ;# 1Mbps
$mac_a($i) set dataRate_ 54.0e6 ;# 54Mbps
$mac_a($i) set basicRate_ 1.0e6 ;# 1Mbps
$netif_a($i) set Pr_ 8.9175e-10
$netif_a($i) set Pt_ 0.2818
$netif_a($i) set freq_ 5.0e+9
$netif_a($i) set RXThresh_ 1.60607e-10
$netif_a($i) set CSThresh_ [expr 0.9*[$netif_a($i) set RXThresh_]]
$mac_a($i) netif $netif_a($i)
$ns_ wireless-config -channel $chan_b
set netif_b($i) [$node_AP($i) add-interface Wireless] ;# add
wireless interface
##802.11b/g
$netif_b($i) set Pr_ 8.9175e-10
$netif_b($i) set Pt_ 0.007214
$netif_b($i) set freq_ 2.4e+9
$netif_b($i) set RXThresh_ 7.138e-11
$netif_b($i) set CSThresh_ [expr 0.9*[$netif_b($i) set RXThresh_]]
$netif_b($i) set DSSS_CWMin 15
[ns] header packets files
I am working with mobile nodes and I want to add a new header field. I have find the files hdr_sr.h and hdr_sr.cc but they are for dsr headers, someone know which are the header files for mobile nodes in general? -- Saludos Jezabel M. Molina Gil
[ns] About mobility models in ns-2
Hi all, I'm need some help with mobility models in ns-2. I read in a paper that a person used the ScenGen tool to generate the scenery. I have a source in C++ that may be of the mobility model that this author made. So, I'd like know how I can use a mobility model in a simulation. I know that the ns-2 can't read a source of a mobility model, but it works with the command setDest. I need to put the source of this model in the ScenGen to this one create the trace for my simulation and the ns-2 will read this trace created?! I don't know how it works and I haven't found anything more specific in the Internet yet. Thanks in advance, Ricardo.
[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: ns-users@ISI.EDU
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.
Re: [ns] Problem setting BO,SO pair in 802.15.4
Thanks for your quick reply, I've tried to patch CsmaCA802_15_4::canProceed method, but the problem isn't disappeared. I've noticed that the problem is present only on SCS802_15_4::startDevice method and not in SSCS802_15_4::startPANCoord method. In addition there are little different between these methods, so I've tried to modify SCS802_15_4::startDevice method, replacing: scan_BO = sscsTaskP.startDevice_BO + 1; with: scan_BO = sscsTaskP.startDevice_BO; In this way output error vanishes but I'm not really sure that this is a true solution because I don't have deeply studied code yet Best regards. Busanelli Stefano Il giorno gio, 22/03/2007 alle 09.35 -0400, Ahmad Khayyat ha scritto: This reminds me about a bug in the original wpan implementation. Not sure if it is fixed in Iyappan patch as I am using ns-2.29. In the method: bool CsmaCA802_15_4::canProceed(double wtime, bool afterCCA) The following declaration exists: UINT_16 t_bPeriods,t_CAP; For large BO/SO values, UINT_16 is insufficient. I replaced it with UINT_32 and many problems with large BO/SO values were resolved. I used to get poor delivery ratio but now it is reasonable. I have no idea whether this has anything to do with your problem, but you might want to give it a try. There is a good chance it does. Make sure you update the type casts related to these two variables in this method, too. - Ahmad On Thu, 22 Mar 2007 10:47:37 +0100 Stefano Busanelli [EMAIL PROTECTED] wrote: Hi all, I'm using ns-allinone-2.31 package, that includes 802.15.4 implementation made by Zheng subsequently patched by Iyappan. If I set to 14 both Beacon Order (BO) and Superframe Order (SO) values of a generic device (not coordinator), ns returns this error message:  unable to start as a device: active channel scan failed - This happens using scss methods and independently from the values assumed by others flags, like assoPermit or isFFD. Instead if I set BO=14 and SO=13, all works well. Am i making some mistakes or the legal pair (BO=14,SO=14) is not admitted in current implementation of 802.15.4? I'm looking forward to receive your prompt reply. Best regards Busanelli Stefano
[ns] ScenGen - tutorial?
Hi, Someone know some tutorial about ScenGen? THanks, Ricardo.
[ns] CURRENT IFQ LENGTH URGENT
Dear all, i am a newbie in ns and i want to take the current value of ifq length ... can any one help how can i achieve this??
Re: [ns] help:Can anyone send me a wireless script which uses Node Movement and Topology Generation Traffic Pattern Generation
this script will create random topology for random no. of nodes , for
random movement and at random amount of time
i think this was what u need.
set min 5.0 #min value
set max1 480.0 #max val of time
set max2 990.0# x-coordinat
set max3 990.0 #y-coordinate
set max4 20.0 #max mobility
set max5 39 #no of node==40
proc value {min max1} {
return [expr {int(rand()*($max1+1))}]
}
proc value_x {min max2} {
return [expr {int(rand()*($max2+1))}]
}
proc value_y {min max3} {
return [expr {int(rand()*($max3+1))}]
}
proc value_z {min max4} {
return [expr {int(rand()*($max4+1))}]
}
proc node_x {min max5} {
return [expr {int(rand()*($max5+1))}]
}
for {set t 0} {$t 100 } { incr t } {
$ns at [value $min $max1] $node_([node_x $min $max5]) setdest [value_x $min
$max2] [value_y $min $max3] [value_z $min $max4]
}
On 3/22/07, Vijay Kumar c [EMAIL PROTECTED] wrote:
Hi ns users,
Can anyone send me a wireless script which uses Node Movement and Topology
Generation Traffic Pattern Generation which uses the setdest tool and
cbrgen traffic there are some errors when i run Marc Greis tutorial script
*
wireless1.tcl* can anybody send any other script other than wireless1.tclby
which i can include the Node Movement and Topology Generation Traffic
Pattern Generation file so that i can run the script in my PC.
Plz try to attach or paste the tcl script in your e-mail
Plz help me your valuble suggesstions and comments are always welcome.
Thanks and Reg:
Vijay
--
Shailesh Gamit
M.Tech (CSE),
Nirma Institute of Technology,
Ahmedabad, India
[ns] Problems with the WiMAX NIST patch
hey ns-users, ive installed the NIST wimax patch, but when i try to simulate simple.tcl(comes with the rar file) i get an error msg saying, invalid command name Mac/802_16 while executing Mac/802_16 set debug_0 file simple.tcl line 45 thanks for your help. rgrds WA Iqbal
[ns] something about CBQ
hi everyone how to understand the relation between eligible_formal ,eligible_ancestros,eligible_toplevel and MAXLEVEl I want to classify some flows into a flow class by their weights,how to do it by modify the CBQ source code. Thanks chenmaoxiang --- 大小单双 机会多多，10分钟就开奖，立即返奖( http://ad4.sina.com.cn/sina/limeng3/mail_zhuiyu/2007/mail_zhuiyu_20070319.html ) === 注册新浪2G免费邮箱（ http://mail.sina.com.cn/chooseMode.html ）
[ns] something about CBQ
hi everyone how to understand the relation between eligible_formal ,eligible_ancestros,eligible_toplevel and MAXLEVEl I want to classify some flows into a flow class by their weights,how to do it by modify the CBQ source code. Thanks chenmaoxiang ---大小单双 机会多多，10分钟就开奖，立即返奖( http://ad4.sina.com.cn/sina/limeng3/mail_zhuiyu/2007/mail_zhuiyu_20070319.html )===注册新浪2G免费邮箱（ http://mail.sina.com.cn/chooseMode.html ） --- 大小单双 机会多多，10分钟就开奖，立即返奖( http://ad4.sina.com.cn/sina/limeng3/mail_zhuiyu/2007/mail_zhuiyu_20070319.html ) === 注册新浪2G免费邮箱（ http://mail.sina.com.cn/chooseMode.html ）
