[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: 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: 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: ns-users@ISI.EDU Ogg: [ns] quot;Check_pktCTRL: Invalid MAC Control subtypequot;. 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: regarding promiscuous mode
Krithiga, answers are inline. Regards, Marco Fiore Messaggio originale Da: [EMAIL PROTECTED] Data: 12-mar-2006 1.24 PM A: ns-users@ISI.EDU, [EMAIL PROTECTED], aodvimpl-public- [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: ns-users@ISI.EDU 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-usersns-users@ISI.EDU 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: ns-users@ISI.EDU 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] 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#39;, needed by `gen/ns_tcl.cc#39;. 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: 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: ns-users@ISI.EDU
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], ns-users@isi.edu
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: ns-users@ISI.EDU
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: ns-users@ISI.EDU, [EMAIL PROTECTED], ns-users@ISI.EDU 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 _0_ AGT --- 17 ack 60 [13a 0 2 800] --- [1:0 0:0 31 0] [0 0] 2 0 s 39.297773794 _0_ AGT --- 18 tcp 1040 [0 0 0 0] --- [0:0 1:0 32 0] [1 0] 0 0 r 39.297773794 _0_ RTR --- 18 tcp 1040 [0 0 0 0] --- [0:0 1:0 32 0] [1 0] 0 0 s 39.297773794 _0_ RTR --- 18 tcp 1060 [0 0 0 0] --- [0:0 1:0 32 2] [1 0] 0 0 s 39.297773794 _0_ AGT --- 19 tcp 1040 [0 0 0 0] --- [0:0 1
[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, ns-users@isi.edu
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], ns-users@isi.edu
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: ns-users@ISI.EDU
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_usersns- [EMAIL PROTECTED] 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 ns-users@ISI.EDU 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_usersns-users@ISI.EDU 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 -2 -Ni 6 -Nx 370.30 -Ny 620.23 -Nz 0.00 -Ne - 1.00 -Nl MAC -Nw --- -Ma ac4 -Md 7 -Ms 0 -Mt 0 s -t 41.038808784 -Hs 6 -Hd -2 -Ni 6 -Nx 370.27 -Ny 620.25 -Nz 0.00 -Ne - 1.00 -Nl MAC -Nw --- -Ma 0 -Md 7 -Ms 0 -Mt 0 s -t 41.039522784 -Hs 6 -Hd -2 -Ni 6 -Nx 370.27 -Ny 620.26 -Nz 0.00 - Ne - 1.00 -Nl MAC -Nw --- -Ma bfe -Md 1 -Ms 6 -Mt 0 s -t 41.039885604 -Hs 1 -Hd -2 -Ni 1 -Nx 612.19 -Ny 664.38
[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: ns-users@ISI.EDU 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: ns-users@ISI.EDU 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: 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: ns-users@ISI.EDU 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: ns- [EMAIL PROTECTED] 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: ns-users@ISI.EDU 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: 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: ns-users@ISI.EDU 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: ns-users@ISI.EDU 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 dist77) dataRate_ = 1*1e6; else if (dist=77 dist65) dataRate_ = 2*1e6; else if (dist=65 dist57) dataRate_ = 6*1e6; else if (dist=57 dist54) dataRate_ = 9*1e6; else if (dist=54 dist50) dataRate_ = 12*1e6; else if (dist=50 dist42) dataRate_ = 18*1e6; else if (dist=42 dist35) dataRate_ = 24*1e6; else if (dist=35 dist23) dataRate_ = 36*1e6; else if (dist=23 dist19) 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: 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-usersns-users@ISI.EDU 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] 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: ns-users@ISI.EDU 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] 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: ns-users@ISI.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]
[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: ns-users@isi.edu 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 Usersns-users@ISI.EDU 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: ns-users@ISI.EDU 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 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: ns-users@ISI.EDU 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: ns-users@ISI.EDU 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 piyush. [EMAIL PROTECTED] 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
[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: ns-users@isi.edu 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: ns- [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: 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.
$ftp
is the FTP instance attached to TCP.
bye,
Marco
Messaggio
originale
Da: [EMAIL PROTECTED]
Data: 5-nov-2006 6.56 PM
A: ns-
usersns-users@ISI.EDU
Ogg: [ns] TCP fixed data transfer
Hi. I
need to transfer 1MB every 10 minutes on wireless lan with TCP. How
can I stop tcp after 1MB is sent?
Thx for help and sorry for my
poor english
Andrea M
[ns] R: how to calculate end to end delay in wireless scenario
Hi, have a look at trace2stats, at http://www.reti.polito.it/fiore bye, Marco Messaggio originale Da: [EMAIL PROTECTED] Data: 15-nov-2006 10.38 AM A: ns usersns-users@ISI.EDU Ogg: [ns] how to calculate end to end delay in wireless scenario hi all, can any one tell me, how to calculate end to end delay in wireless scenario from the trace output or in any other way. its urgent please. thanks in advance venkat. - Find out what India is talking about on - Yahoo! Answers India Send FREE SMS to your friend's mobile from Yahoo! Messenger Version 8. Get it NOW - Find out what India is talking about on - Yahoo! Answers India Send FREE SMS to your friend's mobile from Yahoo! Messenger Version 8. Get it NOW
[ns] R: wimax and Wifi TxPower default value
Ramzi, you can use the Tcl command Phy/WirelessPhy set Pt_ power Look in tcl/lib/ns-default.tcl for default value and other wireless phy parameters. bye, Marco Messaggio originale Da: ramzi. [EMAIL PROTECTED] Data: 22-nov-2006 4.06 PM A: ns-users@ISI.EDU Ogg: [ns] wimax and Wifi TxPower default value Hi all, Could someone tell me what is the default Tx Power for 802.11 ns implementation and what could be a 802.16 default Tx Power. How do we set Tx Power values from C++ code and TCL script ? Best regards, Ramzi TKA
[ns] R: Phy/WirelessPhy set Pt_ ?
Hi, Array should be array... bye, Marco Messaggio originale Da: [EMAIL PROTECTED] Data: 26-nov-2006 5.42 PM A: ns-users@ISI.EDU Ogg: [ns] Phy/WirelessPhy set Pt_ ? I am attemped to use the code line [[lindex [$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: 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-usersns- [EMAIL PROTECTED] 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: ns-users@ISI.EDU 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: 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: ns-users@ISI.EDU 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: ns-users@ISI.EDU 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: ns-users@ISI.EDU 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: 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
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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: ns-users@ISI.EDU 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: ns-users@ISI.EDU Ogg: [ns] why RTP header in UDP#39;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- usersns-users@ISI.EDU 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: ns-users@ISI.EDU 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#39;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) \ -ifqType $val(ifq) \ -ifqLen $val(ifqlen) \
[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: ns-users@ISI.EDU 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: 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: ns-users@ISI.EDU 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!
