LTE High speed movement

[Elen]

Hello,

Sorry if this is a pretty easy question and was covered already, but I could not understand how this should work.

I have LTE simulation scenario with several ENBs and 1 UE, I am setting different speed (rerunning the same scenario ones again) for UE - for e.g. 20m/s, 100m/s, or even 500m/s (!!!), however I get the same, quite working handovers and good DL/UL speed.

I have tried setting Pathloss model to get results more close to reality, but nothing changes - still handovers are working like a charm and connection speed is very good.

(I'm setting IdealRRC = false, UlBandwidth/DlBandwidth = 100)

Is it expected that high movement speed does not affect HO and connection speed?

I found this topic (but it's quite old) : https://groups.google.com/g/ns-3-users/c/mLfikKZQEn4/m/RzIYCX6aDQAJ and it seems that this was working as expected..

If movement speed should affect handovers and connection speed, could be please give me link to topic where to read about correct configuration/understanding of such scenario?

Thanks in advance if someone takes a look on this.

BR,

Jelena

[Gabriel Ferreira]

No. High speed will destroy your network. This is why 5G has higher numerologies, which use more bandwidth to reduce duration of symbols, reducing the doppler effect and allowing for better QAM demodulation.

You are not seeing this because you are most likely not using the 3GPP-channel-propagation-loss model or the trace-fading-loss-model, which handle the doppler effect.
After you switch to it, you will also need to set ThreeGppChannelModel::vScatt to the maximum speed found in the simulation.