Observing my cellphone switch towers

Re:Observing my cellphone switch towers by teeray on Sunday May 16, 2021 @11:04AM (#27174185)

I think trains are kind of a special case in telephony when it comes to handoffs. It’s a unique situation where you have hundreds and hundreds of UEs[0] having to detach and re-attach, which makes for a very busy MME[1]. Sometimes those phones are only briefly connected to a given eNB[2] too, which makes all that effort for naught.

[0] Phones

[1] The system which sits immediately behind cell towers and coordinates handoffs

[2] Tower

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Re:Observing my cellphone switch towers by exikyut on Sunday May 16, 2021 @11:09PM (#27179711)

The canonical solution in train/subway/metro systems seems to be full-length antennas that span the tunnel corridor.

The cool solution would be base stations built into train carriages that then uplink through some kind of backhaul.

I think (but need to properly evaluate) that some Australian trains use something like this. EDIT: Nooope nope nope, horribly misread. https://goughlui.com/2014/03/23/random-post-railcorp-gsm-r-r...

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