3 ms·

There's a limited amount of "space" in the air, ie not everyone can be transmitting at the same time. This is fixed using a few different techniques depending o

There's a limited amount of "space" in the air, ie not everyone can be transmitting at the same time. This is fixed using a few different techniques depending on the cell network but for GSM something called TDMA (Time division multiple access) is used. This basically gives your phone a certain amount of time to broadcast on before it should leave the airwaves for someone else to transmit on. Too many people in one location means not enough time for everyone to transmit.

ghthor 9y ago
This is the main reason yes. No amount of backhaul can change this. There are 2 solutions to this problem. 1) Distributing a web of much smaller cells, lower power so much less devices are connected per node. 2) DIDO pCell technology developed by Artemis. All antennas transmit and the waveforms from each broadcast interfere around each receiver to create a valid signal for that signal device. Both systems require loads of calculations by the broadcasters to either manage handoffs from each mini cell, or to calalate valid distributed broadcasts per each receiver. This type of event would have been a great opportunity for Artemis to show off their tech.
vvanders 9y ago
That's not really quite accurate on modern networks. Most of them use CDMA which allows many devices to transmit/receive at the same time, assuming that they can modulate their power with respect to distance from the tower/etc(which is a requirement for the "xor" to cancel out). That said there's still a bunch of other stuff you have to sort out if you want to support that many devices in a small space.
- dboreham 9y ago
  "Many" is still not thousands or even hundreds.
- TrickyRick 9y ago
  > Most of them use CDMA Really? I thought CDMA was something only Verizon used for their network. I tried looking into it a bit prior to writing the original answer but I couldn't find anything other than a mention on the TDMA Wiki [1] which has a [citation needed]. Do 3G/4G networks across the world use CDMA as well? Because I know that in Sweden carriers are buying up large chunks of frequency bands to be able to increase 4G coverage, that shouldn't be needed with CDMA, right? [1]: https://en.wikipedia.org/wiki/Time-division_multiple_access https://en.wikipedia.org/wiki/Time-division_multiple_access

ghthor 9y ago

This is the main reason yes. No amount of backhaul can change this. There are 2 solutions to this problem. 1) Distributing a web of much smaller cells, lower power so much less devices are connected per node. 2) DIDO pCell technology developed by Artemis. All antennas transmit and the waveforms from each broadcast interfere around each receiver to create a valid signal for that signal device. Both systems require loads of calculations by the broadcasters to either manage handoffs from each mini cell, or to calalate valid distributed broadcasts per each receiver. This type of event would have been a great opportunity for Artemis to show off their tech.

vvanders 9y ago

That's not really quite accurate on modern networks. Most of them use CDMA which allows many devices to transmit/receive at the same time, assuming that they can modulate their power with respect to distance from the tower/etc(which is a requirement for the "xor" to cancel out). That said there's still a bunch of other stuff you have to sort out if you want to support that many devices in a small space.

dboreham 9y ago
"Many" is still not thousands or even hundreds.
TrickyRick 9y ago
> Most of them use CDMA Really? I thought CDMA was something only Verizon used for their network. I tried looking into it a bit prior to writing the original answer but I couldn't find anything other than a mention on the TDMA Wiki [1] which has a [citation needed]. Do 3G/4G networks across the world use CDMA as well? Because I know that in Sweden carriers are buying up large chunks of frequency bands to be able to increase 4G coverage, that shouldn't be needed with CDMA, right? [1]: https://en.wikipedia.org/wiki/Time-division_multiple_access https://en.wikipedia.org/wiki/Time-division_multiple_access