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

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