Wifi node senses channel without RX

[TIM]

Hello everyone,

Is it possible that wifi AP senses channel and get noise power or interference without any received packet?

I know I can use $ns3::LteUeNetDevice/ComponentCarrierMapUe/[i]/LteUePhy/DlSpectrumPhy/RxEndOk to get noise power when the UE receive a packet.

But now I want to let wifi AP only senses the channel without receiving or transmitting packets.

I can't find the possible trace or function to solve my problems.

Could anyone help me?

Thanks a lot! ,

Tim

[Rediet]

Hello Tim,

I don't think that there's something like that. You can try to cook something up based on the fact that the AP has to periodically send beacons (or you can set up your own periodical sensing period) and could sense the channel before sending it.

Good luck,

Rediet

[TIM]

Hi Rediet,

Thanks your reply!!

OK, I would senses the channel based on the beacon.

The another question is that how the Wi-Fi AP senses the channel. 

Is there any helper or function in wifiphy (or another class) can sense and show interference ?

[Rediet]

Hello Tim,

I haven't checked if it works but doing something like invoking a tailor-made method of InterferenceHelper returning noise+interference level (probably mimicking what's done in GetEnergyDuration) inside SendPacket method of WifiPhy.

Cheers,

Rediet