At chaos communications Congress we usually get a little spectrum for the local network. But it's not treated as critical as the local DECT network. I for one

At chaos communications Congress we usually get a little spectrum for the local network. But it's not treated as critical as the local DECT network. I for one wish there'd be software support for the LTE feature that allows a PHY-level broadcast to be received by phones, because we could offer very low latency audio streaming of all the audio tracks (usually German/English presenter, the other via a live-dub, and sometimes french or so as a live dub), so that people could sit in the talk and get their audio via headphones. The DECT network provided that offering previously, but the conference modules (it was a conference call where you defaulted to being muted) had to go for more base station (controller? For remote radio heads or so, because you'd not want to run RF antenna cables from the box to all the locations...) modules. Also there were doubts as to the PHY being broadcast/multicast or it being unicast, as the latter would be a problem for the large lecture halls due to issues with dividing them into a grid of Femto cells (DECT seems to be badly suited to that approach, but I don't know why exactly). My idea of a solution would be a wifi distributed-mimo/synchronous base station that feels like one (or a handful) of BSSIDs per frequency (like, a particular 40 or 80 MHz channel in the 5GHz region), but doesn't make clients even aware of roaming happening: ideally it could do full MIMO between the clients transmitting (they listen before they start talking, and don't talk when they could hear someone else saying something (even if they can't make out any words); this could easily be multiple clients with many dozen base stations spread around) and all base station antennas that can get a decent signal strength (trying to make out each transmission even if any individual antenna heard a combination of the transmission, akin to normal wifi MIMO). Then in the other direction utilizing beamforming to not confuse clients with more overlapping signals than their receive antennas can pick apart (and isolate the signal(s) intended for that client from everything else) (like, talking to clients that are sufficiently far apart so the base can make all other client's signals weak enough to not be a problem for the one client). Because it can pre-compensate for the base transmissions from the nearby antennas overlapping at the clients, it can simultaneously use overlapping antenna "cells". And PHY-broadcast (also useful for multicasting) can transmit on all at once simultaneously by being sufficiently synchronous (same mechanism as the echo/reflection/multi-path mitigation of OFDM).