[Mini-NDN] Emulations using Wifi

Wed Jul 14 20:13:49 PDT 2021

We've used IP multicast in the past to the best of my recollection but we don't have a current example of it which is a definite issue. I'll try and dig up some old code and let you know if we had to do anything in particular with it.

Also I've been trying to improve the documentation, a lot of it is tentative and I need to expand the Wifi specific section a tremendous amount but what I have so far is at this Gerrit change if it would be helpful at all https://gerrit.named-data.net/c/mini-ndn/+/6455

Vis a vis propagation models, I don't know if we've played with them too much but there should be no obvious issue with using them. We have a few methods of using mobility (replay (which is basically sets of beginning and end points and start/end points) and model (ie things like gauss markov)) provided by Mininet-Wifi which you can see simple examples of in the wifi_ping.py code in examples.

Feel free to send over any further questions, and I'll try and provide additional clarification of the multicast support ASAP tomorrow.
-Alex
________________________________
From: Mini-NDN <mini-ndn-bounces at lists.cs.ucla.edu> on behalf of Philipp Moll <phmoll at cs.ucla.edu>
Sent: Wednesday, July 14, 2021 7:42 PM
To: Saurab Dulal (sdulal) <sdulal at memphis.edu>; mini-ndn at lists.cs.ucla.edu <mini-ndn at lists.cs.ucla.edu>
Subject: Re: [Mini-NDN] Emulations using Wifi

Hi Saurab,

without having tried the code, I am impressed by what is supported! Thanks a lot for sharing the information.

I looked through the different wifi code-pieces and there are still some missing links where I don't know yet how everything works together.

I guess the wifi_ping examples should be started with the singleap-topology.conf<https://github.com/named-data/mini-ndn/blob/master/topologies/wifi/singleap-topology.conf>. This configuration defines one access point and two stations. But it also defines links connecting the stations with the AP. I guess those are the Wifi links that underlie some propagation loss model, right?

And in the wifi_ping example, faces are created directly between the two stations (Lines 67-69: "a" opens the face to the IP address of "b"). So, my understanding of multicast faces is limited, but is it possible that both stations open a "Wifi-face" that hears everything what is sent over the AP's wifi? Eg., when having 10 stations, every station only needs to open a Wifi face and hears all other stations that are within the current range.

I guess when doing a MANET evaluation, such a behavior would be very helpful. Or maybe I am just thinking overly complex.

Thanks,
Philipp

On 7/13/21 9:31 PM, Saurab Dulal (sdulal) wrote:
Hi Philipp,

Wifi<https://github.com/named-data/mini-ndn/tree/master/minindn/wifi> is now the part of Mini-NDN main repository. Yes, the documentation has not been released yet, it is still a work in progress. You can refer to this example: https://github.com/named-data/mini-ndn/blob/master/examples/wifi/wifi_ping.py and the wifi code<https://github.com/named-data/mini-ndn/tree/master/minindn/wifi> to get some ideas.

Mobility and broadcast are supported by the wifi module. Mini-NDN wifi is based on mininet-wifi (https://github.com/intrig-unicamp/mininet-wifi) so, most of the functionality supported by mininet-wifi is also supported Mini-NDN Wifi.

Mininet-Wifi supports a few propagations loss models (https://mininet-wifi.github.io/propagation/), I believe they should be supported by the Mini-NDN wifi as well, but I am not entirely sure. Someone from Wifi developer team needs to chip in here.

Best,

Saurab
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Subject: [Mini-NDN] Emulations using Wifi

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Hi everyone,

a couple of months ago, I saw that the MiniNDN Github repository has a
branch called "wifi". I guess this branch is somehow related to
emulating wifi networks, but I haven't found documentation about this
functionality. So, I am curious whether MiniNDN provides Wifi
functionality, and if it does, to what degree Wifi is supported. So for
instance, is it possible to emulate a WiFi broadcast media where
multiple nodes hear packets on the same "link"? If yes, another question
would be if propagation loss models and mobility is supported?

Thanks,
Philipp

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