Change Bandwidth in Ad-hoc Network

[Mohamed Fahmy]

Hi

I am using mininet-wifi to test the performance of an ad-hoc network. I would like to change the bandwidth of ad-hoc links. Nothing I do seems to work and the bandwidth remains unchanged every time I run the simulation. Can you explain why this is happening and how can I set the maximum bandwidth on Ad-hoc links?

The average bandwidth in the host machine is 5 Gbps but when I run the mininet-wifi simulation I only get 20 Mbps bandwidth.

[Ramon Fontes]

1. Does the wifi mode you are using support more than 20Mb?

2. How many hops does the network topology have?

3. You can set the bitrate with iw

Sent from my android

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[Mohamed Fahmy]

I am using mode 'a' with ad-hoc channel 36. The current network has a maximum of 2-3 hops.

I tried setting the bitrate with iw and iwconfig but I am still getting the same bandwidth when I test using iperf.

My configuration is mostly similar to the adhoc.py example. Here is my ad-hoc link configuration:

net.addLink(sta1, cls=adhoc, intf='sta1-wlan0', ssid='adhoc-net', mode='a', channel=36, txpower=17)

I am new to mininet-wifi. Is there a way I can specify a desired bandwidth for ad-hoc links or increase the bandwidth to 80Mbps?

[Ramon Fontes]

> I am using mode 'a' with ad-hoc channel 36. The current network has a maximum of 2-3 hops.

You may know that every hop on the network takes one-half of the
bandwidth away, right?

> I tried setting the bitrate with iw and iwconfig but I am still getting the same bandwidth when I test using iperf.

I really appreciate it if you describe the commands you are using with
the expected results.

> I am new to mininet-wifi. Is there a way I can specify a desired bandwidth for ad-hoc links or increase the bandwidth to 80Mbps?

Are you new to wifi too? How can you reach 80Mbps with mode a? You can
modify the signal table
(https://github.com/intrig-unicamp/mininet-wifi/blob/master/mn_wifi/data/signal_table_ieee80211ax),
in particular PER, if you really wish to reach such a throughput.