NB-IoT

Defined in R13, another mode instead of LTE-M.

Bandwidth – 200KHz.

• One resource block in GSM/LTE.

Based in LTE protocol, stripped down.

• OFDMA(down)/FDMA(up), QPSK.

• 200kbps (down)/20kbps(up).

Three modes of operation.

• Uses LTE design extensively.

• Lower cost in terms of channel utilization.

• Extended coverage.

• Low Receiver sensitivity = -141 dBm.

• Long battery life: 10 years with 5 Watt Hour battery (depending on traffic and coverage needs).

• Support for a massive number of devices: at least 50.000 per cell.

• 3 modes of operation:

  • Stand-alone: stand-alone carrier, e.g. spectrum currently used by GERAN (GSM Edge Radio Access Network) systems as a replacement of one or more GSM carriers.

  • Guard band: unused resource blocks within an LTE carrier’s guard-band.

  • In-band: resource blocks within a normal LTE carrier.

Architecture