Change modulation scheme on 802.11n 2.4Ghz

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Diego Eduardo torres

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Jun 21, 2023, 4:00:28 AM6/21/23

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Hello everyone,

I'm working on a project using NS-3 and I need some guidance on how to change the modulation scheme (HT-MCS 0, 1, 2, 3, 4, 5, 6, 7) during the execution of my simulation. I would like to know if there is a function or parameter available in NS-3 that allows me to dynamically change the modulation scheme, based on a condition that I specify.

I have already explored the existing configuration options in NS-3, such as WifiRemoteStationManager and ConstantRateWifiManager, but I couldn't find a straightforward way to achieve the desired modulation change during the simulation.

Could you please provide some insights or code examples on how I can implement this functionality? Any suggestions or pointers to relevant documentation or examples would be greatly appreciated.

Thank you in advance for your help!

Jack Higgins

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Jun 28, 2023, 7:01:47 AM6/28/23

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As far as I know, what you are asking is not physically possible.

A PHY has a modulation capability hardcoded (a chip that does the modulation), so it does not make sense to me to "dynamically " change the modulation.

You could, however, have 2 interfaces in a single node. In this way, you could install one interface with 1 modulation and the 2nd interface with a different modulation scheme.

Then you could switch between the used interfaces dynamically during the simulation.