The interference range control in mininet-wifi

[GANLIN TANG]

Hello:

There is a question about how to control the interference range to avoid the CSMA/CA collision,

cause we can see the transmission range of the nodes, but actually I can't get 

the interference range of nodes and I'm not found the attribute in the node.

and it will influence even I change the node to a far distance.

When the E->F, B->C transmission seperately they still influence each others.

[Ramon Fontes]

Dear,

Many of your questions have already been addressed on this mailing list. Please take a moment to review the previous discussions.

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[GANLIN TANG]

Thanks for reply:

But could please share just one link?

I guess the key word which I used is not same to the old questions.

Thanks!

[Ramon Fontes]

Multi-medium support in wmediumd was introduced in https://github.com/intrig-unicamp/mininet-wifi/commit/da0320efa87879a0b8b33c251a5f37635c1ba1c1#diff-d2c19ca10045ccc75baa61a9b952b7518b72043dbf32263ea61e90cac05918b9 and an example can be found at https://github.com/intrig-unicamp/mininet-wifi/blob/master/examples/wmediumd_multimedium.py.

It’s becoming difficult to keep up with the volume of questions you’re posting. I kindly ask that you review the previous discussions in this mailing list or check the GitHub issues before submitting new ones.

To view this discussion visit https://groups.google.com/d/msgid/mininet-wifi-discuss/906c7c30-e263-4b39-ae43-dafff1e01055n%40googlegroups.com.

[GANLIN TANG]

Hello Ramon:

I guess there is some bug in the plotGraph with containernet by docker.

Currently I use containernet to build a adhoc, actually it works good,

But a little problem happened, in the image displayed with matplotlib, if I execute py A.setPosition('360,295,0'), the point does move accordingly, but the initial point does not disappear and still remains. 

However, when I check using dev A-vlan0 station dump, the point has indeed moved successfully and no duplication occurred. 

I have appended the code in the attachment for your review. 

Thanks again for your help.

[Ramon Fontes]

There is no bug in plotGraph(). The issue comes from using build() and start() together in the same code, which is not allowed.

To view this discussion visit https://groups.google.com/d/msgid/mininet-wifi-discuss/76b22c26-079c-4967-a267-c72dc0823a9cn%40googlegroups.com.

[GANLIN TANG]

Thanks for the super speed reply.

And it works so good!!

Thanks!!!!!

[GANLIN TANG]

Hello Ramon:

Thanks for your help.

Based on the example from wmediumd_multimedium, I understand that different stations can be isolated from interference by assigning them to different mediums. 

However, in dynamic scenarios, is it possible to change their medium assignments based on distance — so that when two stations are within a certain range they interfere with each other, but when they are farther apart they do not? This would better reflect real-world behavior.

Thanks again.

[Ramon Fontes]

I haven’t had the chance to work with dynamic scenarios yet, but I believe it can be done using the network ID.

To view this discussion visit https://groups.google.com/d/msgid/mininet-wifi-discuss/b74857c9-6167-42e9-b971-d04c08269197n%40googlegroups.com.

[GANLIN TANG]

Hello Roman:

I have check the key word about network_id, actually there only some file about this parameters,

but there is not any example inside.

And I also check the station's params:

py A.params
{'ip': '10.0.0.1/8', 'ip6': '2001:0:0:0:0:0:0:1/64', 'channel': 1, 'freq': 2.4, 'mode': 'g', 'encrypt': '', 'passwd': None, 'ieee80211w': None, 'mac': '00:00:00:00:00:01', 'cpu_shares': 20, 'wlan': ['A-wlan0']}
It's not include the parameter of network id.

Is there any way to chagne it?

Thanks!

[Ramon Fontes]

It is not implemented yet.

To view this discussion visit https://groups.google.com/d/msgid/mininet-wifi-discuss/da86c092-531c-43f9-9f7f-ce8a072a6481n%40googlegroups.com.