ORBIT-USER: questions on noise generator

[Shivesh Makharia]

Hi,

Just for information -

I do not use node handler, but have used the web service for noise
generation. It seems to work fine and I also see different throughput
according to the noise injection power.

Shivesh


On 1/9/07, Yang Chen <yangchen at cc.gatech.edu> wrote:
>
> There is one post in the mailing list days ago about channel setup,
> according to that, if you want to set the channel to 1,
> you need to use
> > > node.net.wo.frequency= '2.412G'
>
> I guess here is the wo is a typo for w0
>
> I tried the following ways after checking possible values of w0's property
> on
> http://www.orbit-lab.org/wiki/Tutorial/HowtoWriteScripts/OrbitRuby:
>
> 1) add "node.net.w0.channel  = 36" to both sender and receiver part in the
> ruby script
> - No change in the throughput values;
>
> 2) add " node.net.w0.frequency = "5.8G"  " to both sender and receiver
> part
> in the ruby script
> - Warning message:  WARN net/w0: Unrecognized path 'net/w0/frequency='
>
> 3) add " node.net.w0.frequency ='5.8G'  " to both sender and receiver part
> in the ruby script
> - Warning message: WARN net/w0: Unrecognized path 'net/w0/frequency='
>
> 4) add " node.net.w0.frequency = 5.8 " or " node.net.w0.frequency = 5.8G";
> FATAL run: Exception: /, unexpected tCONSTANT, expecting '}'
>
> How can we setup the channel and how can we verify it?
>
> And in addition, what is the default channel? I tried to set the noise
> generation on channel 1. Again, no difference in terms of throughput.
>
> Thanks for any info.
>
> -Yang
>
>
> ----- Original Message -----
> From: Sachin Ganu
> To: orbit-user at winlab.rutgers.edu
> Sent: Monday, January 08, 2007 5:22 PM
> Subject: Re: ORBIT-USER: questions on noise generator
>
>
> This may be a redundant question, but did you set your nodes to
> communicate
> on channel 36 as well and made sure that they indeed are
>
>
> On 1/8/07, Yang Chen <yangchen at cc.gatech.edu> wrote:
> hi, there:
>
> Did anyone successfully use those commands on page
> http://www.orbit-lab.org/wiki/Documentation/ArbInterference
> to create unstable wireless links in the experiment?
>
> I modify the helloworld example in the whenallinstalled loop as follows:
> =====================
> whenAllInstalled() {|node|
> wait 10
> system "wget
> http://instrument1.orbit-lab.org:5012/interference/initialize"
> wait 20
> system "wget
> http://instrument1.orbit-lab.org:5012/interference/awgn?bandwidth=20 "
> system "wget
> http://instrument1.orbit-lab.org:5012/interference/set?power=-30&channel
> =36"
> system "wget http://instrument1.orbit-lab.org:5012/interference/start"
> allNodes.startApplications
> wait 100
> system "wget http://instrument1.orbit-lab.org:5012/interference/stop"
> wait 100
> Experiment.done
> }
> =====================
> Other minor changes are:
> The experiment is carried on grid node2-1, 2-2 (which should be quite
> near to the noise generator) transmission rate is 3000 kbps.
>
> I want to see difference in terms of throughput at the receiver after
> 100 seconds' transmission since the noise generation is stopped.
>
> I tried power level at -30dBm and -10dBm. However, when I get experiment
> results, I cannot find any difference in terms of throughput. (always a
> little bit lower than 3000Kbps during the 200 seconds transmission).
>
> In addition, can we individually control any of these four noise
> generation antennas?
>
> Any suggestions would be appreciated.
>
> rgds,
> Yang
>
> ----- Original Message -----
> From: "Ivan Seskar" < Seskar at winmain.rutgers.edu>
> To: <orbit-user at winmain.rutgers.edu>
> Sent: Friday, January 05, 2007 7:26 AM
> Subject: RE: ORBIT-USER: Problem with noise generator
>
>
> > Hi Swapnil,
> >
> > The service is up and running (and never went down). The problem is in
> > the old version of nodeHandler and the fact that we upgraded noise
> > injection service. Until we upgrade nodeHandler, you will have to
> issue
> > commands to the service directly from your script; the basic
> > "documentation" is available at:
> >
> > http://www.orbit-lab.org/wiki/Documentation/ArbInterference
> >
> > Regards,
> >
> > Ivan.
>
> ----- Original Message -----
> From: Zhibin Wu
> To: orbit-user at winlab.rutgers.edu
> Sent: Monday, January 08, 2007 4:13 PM
> Subject: Re: ORBIT-USER: AP question
>
>
> I think you do not need spacial prototype for AP. Just set it as
> "master"
> mode will make it relay packets.
> However, if you want some measurements reported from that AP, then you
> need
> the prototype configuration.
>
>
> On 1/8/07, Andrea G Forte <andreaf at cs.columbia.edu> wrote:
> I have one question about how the APs work in the test-bed.
> I have seen many examples in the wiki where the AP sends and receives
> packets using the prototype "sender" and/or "receiver". Do I have to
> define a prototype for the AP if I want station A to send packet to
> station B using that AP? Is it possible to just specify mode (Master),
> channel and network  (802.11b), without anything else and have the AP
> work as a normal AP (relay packets between stations)?
>
> Thanks a lot,
> -Andrea
>
>
>
>
>
> --
> Zhibin Wu
> Graduate Research Assistant
> WINLAB, Rutgers University
> Technology Centre of New Jersey
> 671 Route 1 South
> North Brunswick, N.J. 08902-3390
> Phone: 732-932-6857 x653
> Fax:   732-932-6882
>
>


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