ORBIT-USER: questions on noise generator

[Yang Chen]

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