Problem in beacon broadcast

[Giuliana Carullo]

Hello everyone,

I am trying to simulate nodes acting both as wifi-client and AP. In particular, every node announces its presence sending beacons (AP-mode) and recognizes other nodes' presence listening to other nodes' beacons (wifi-client-mode). 

My problem is that, if nodes are in the same position, the ad-hoc node (wifi-client) properly receives the AP's beacon. Otherwise they do not.  

Here is the code I wrote so far: http://codeviewer.org/view/code:4b8c (Sorry if the code is not really clean) 

Any suggestion is welcome. 

Best Regards,

Giuliana Carullo

[Giuliana Carullo]

Just to let you better understand the problem I have:

while considering the following code

for (uint n=0 ; n < numNodes ; n++) {

//distance = distance +10;

Ptr<ConstantPositionMobilityModel> mob = ap.Get(n)->GetObject<ConstantPositionMobilityModel>();

mob->SetPosition(Vector(distance, distance, 0));

mob = wifiClient.Get(n)->GetObject<ConstantPositionMobilityModel>();

mob->SetPosition(Vector(distance, distance, 0));

}

if I uncomment the line 'distance = distance +10;' nodes stop receiving beacons. Otherwise it works.

Thank you for your help in advance.

Regards,

Giuliana

[Tommaso Pecorella]

Hi,

didn't check the code yet, but a line in the sources draw my attention.

Are you going to simulate nodes with psychic disorders ? THAT's a new research field !
Sorry for the (bad) joke. I'll check your code later tonight as self-inflicted punishment.

Cheers,

T.

PS: no offence or whatsoever with whoever is affected by / knows someone affected by Bipo.

[Tommaso Pecorella]

Hi,

from the code, you're setting the Rx gain to -10 db. Try to check if this isn't a bit too low. Perhaps your receivers are just deaf.

Cheers,

T.

[Giuliana Carullo]

Hi Tommaso,

thanks for your help! Actually, my nodes suffer from different diseases: they are bipolar, a bit of autism from time to time, and they are deaf xD

Unfortunately, I tried to set different values for the Rx gain, but they're still deaf xD Any other suggestion for a possible therapy?

Cheers,

Giuliana.

[Tommaso Pecorella]

Yo Giuliana,

I can't run your script 'cuz it's missing a file (or some files). Feel free to send me them and I'll take a look.

Cheers,

T.

[Giuliana Carullo]

Hi Tommaso,

I'm sorry, you are right.

Here is the included script:

http://codeviewer.org/view/code:4b90

Thanks again!

Cheers,

Giuliana

[Tommaso Pecorella]

Ok, I guess you need to clean up your code. From the bugs I mean.

The wifi STA are on AdHoc:

  wifiMac.SetType ("ns3::AdhocWifiMac");

The APs are all in AP mode, but are on different SSIDs.

No wonder they're not communicating...

However, the point is... no beacon is received, in any case. The distance is not the problem.

Have a nice weekend,

T.