Cellular NarrowBand IOT

NarrowBand IoT (NB-IoT) is a Low Power Wide Area Network (LPWAN) radio technology standard developed to enable a wide range of devices and services to be connected using cellular telecommunications bands. NB-IoT is a narrowband radio technology designed for the Internet of Things (IoT) and is one of a range of Mobile IoT (MIoT) technologies standardized by the 3rd Generation Partnership Project (3GPP). Other 3GPP IoT technologies include eMTC (enhanced Machine-Type Communication) and EC-GSM-IoT. The NB-IoT specification was frozen at Release 13 of the 3GPP specification (LTE-Advanced Pro), in June 2016.

NB-IoT focuses specifically on indoor coverage, low cost, long battery life, and enabling a large number of connected devices. The NB-IoT technology is deployed “in-band” in spectrum allocated to Long Term Evolution (LTE) – using resource blocks within a normal LTE carrier, or in the unused resource blocks within a LTE carrier’s guard-band – or “standalone” for deployments in dedicated spectrum. It is also suitable for the re-farming of GSM spectrum.

LTE Cat 1 LTE Cat 0 LTE Cat M1(eMTC) LTE Cat NB1(NB-IoT) EC-GSM-IoT
3GPP Release Release 8 Release 12 Release 13 Release 13 Release 13
Downlink Peak Rate 10 Mbit/s 1 Mbit/s 1 Mbit/s 250 kbit/s 474 kbit/s (EDGE)2 Mbit/s (EGPRS2B)
Uplink Peak Rate 5 Mbit/s 1 Mbit/s 1 Mbit/s 250 kbit/s (multi-tone)20 kbit/s (single-tone) 474 kbit/s (EDGE)2 Mbit/s (EGPRS2B)
Latency 50-100ms not deployed 10ms-15ms 1.6s-10s 700ms-2s
Number of Antennas 2 1 1 1 1-2
Duplex Mode Full Duplex Full or Half Duplex Full or Half Duplex Half Duplex Half Duplex
Device Receive Bandwidth 1.08 – 18 MHz 1.08 – 18 MHz 1.08 MHz 180 kHz 200 kHz
Receiver Chains 2 (MIMO) 1 (SISO) 1 (SISO) 1 (SISO) 1-2
Device Transmit Power 23 dBm 23 dBm 20 / 23 dBm 20 / 23 dBm 23 / 33 dBm

Sources:

  • Preliminary specification (Source: 3GPP)
  • 3GPP TS45.001

See also

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