infrastructure review: GSM
Mission Impossible: mobile telephony in Germany, outside of cities, on the field.
we do it using the Open Source MObile COMmunication stack (osmocom)
all you need is a SIM card, either from a previous conference, or a new on at the POC.
flat rate for 3 euros, including outgoing and incoming calls.
small base stations hidden in toilets
10x 2G/GSM base stations
17x 3G/UMTS base stations
This year we also had 4G/LTE for the first time (except for iPhones)
6x 4G/LTE base stations
backend: NextEPC MME + osmocom HLR
backend: NextEPC MME + osmocom HLR
with decent speed
smooth operation
smooth operation
new this year: angel-driven help desk
2G/3G audio codec mismatch (we don’t transcode yet)
4G/LTE calls/SMS (using Circuit Switched Fall Back)