[Mini-NDN] Emulations using Wifi

[Saurab Dulal (sdulal)]

________________________________
From: 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.


- The example only demonstrates the working of wifi, unfortunately not the multicast. Yes, it is possible to achieve what you are asking. Every station just needs to create a route to the desired prefix via the multicast face face-id. And that is it.


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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From: Mini-NDN <mini-ndn-bounces at lists.cs.ucla.edu><mailto:mini-ndn-bounces at lists.cs.ucla.edu> on behalf of Philipp Moll <phmoll at cs.ucla.edu><mailto:phmoll at cs.ucla.edu>
Sent: Tuesday, July 13, 2021 6:02 PM
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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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