Narrowband IoT

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Narrowband Internet of Things (NB-IoT) is a Low Power Wide Area Network (LPWAN) radio technology standard developed by 3GPP to enable a wide range of cellular devices and services.[1][2] The specification was frozen in 3GPP Release 13 (LTE Advanced Pro), in June 2016.[3] Other 3GPP IoT technologies include eMTC (enhanced Machine-Type Communication) and EC-GSM-IoT.[4]

NB-IoT focuses specifically on indoor coverage, low cost, long battery life, and high connection density. NB-IoT uses a subset of the LTE standard, but limits the bandwidth to a single narrow-band of 200kHz. It uses OFDM modulation for downlink communication and SC-FDMA for uplink communications. [5][6][7][8][9]

In March 2019, the Global Mobile Suppliers Association announced that over 100 operators have deployed/launched either NB-IoT or LTE-M networks.[10]

3GPP Narrowband Cellular Standards[edit]


[11][12]
LTE Cat 1 LTE-M NB-IoT EC-GSM-IoT
LC-LTE/MTCe eMTC
LTE Cat 0 LTE Cat M1 LTE Cat M2 non-BL LTE Cat NB1 LTE Cat NB2
3GPP Release Release 8 Release 12 Release 13 Release 14 Release 14 Release 13 Release 14 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 1.4 – 20 MHz 1.4 – 20 MHz 1.4 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

Deployments[edit]

As of March 2019 GSA had identified:[13]

  • 149 operators in 69 countries investing in one or both of the NB-IoT and LTE-M network technologies
  • 104 of those operators in 53 countries had deployed/launched at least one of the NB-IoT or LTE-M technologies of those, 20 operators in 19 countries had deployed/launched both NB-IoT and LTE-M[14]
  • 22 countries are now home to deployed/launched NB-IoT and LTE-M networks
  • 29 countries are home to deployed/launched NB-IoT networks only
  • Two countries are home to deployed/launched LTE-M networks only
  • 141 operators in 69 countries investing in NB-IoT networks; 90 of those operators in 51 countries had deployed/launched their networks[14]
  • 60 operators in 35 countries investing in LTE-M networks; 34 of those operators in 24 countries had deployed/launched their networks

Devices and modules[edit]

The 3GPP-compliant LPWA device ecosystem continues to grow. In April 2019, GSA identified 210 devices supporting either Cat-NB1/NB-2 or Cat-M1 – more than double the number in its GAMBoD database at the end of March 2018. Specifically, GSA logged 156 modules supporting both Cat-NB1, NB2, or Cat-M1 (including known variants); 100 modules supporting Cat-M1 (including known variants); and 103 modules supporting Cat-NB1 or NB2 (including known variants).[14]

See also[edit]

References[edit]

  1. ^ "NarrowBand – Internet of Things (NB-IoT)".
  2. ^ Grant, Svetlana (September 1, 2016). "3GPP Low Power Wide Area Technologies - GSMA White Paper" (PDF). gsma.com. GSMA. p. 49. Retrieved October 17, 2016.
  3. ^ "Standardization of NB-IOT completed". 3gpp.org. 3GPP. June 22, 2016. p. 1. Retrieved August 19, 2016.
  4. ^ "Extended Coverage - GSM - Internet of Things (EC-GSM-IoT)". gsma.com. GSMA. May 11, 2016. p. 1. Retrieved October 17, 2016.
  5. ^ Ryu, Jaeku. "NB-IoT Handbook".
  6. ^ Lawson, Stephen (September 21, 2015). "NarrowBand IoT standard for machines moves forward". computerworld.com. Computerworld / IDG. p. 1. Retrieved September 24, 2015.
  7. ^ Jones, Dan (September 11, 2015). "Ericsson, Intel, Nokia Back New Narrowband LTE IoT Spec". lightreading.com. LightReading. p. 1. Retrieved September 24, 2015.
  8. ^ Scales, Ian (September 18, 2015). "3GPP agrees 'harmonized' proposal for narrowband IoT radio technology". telecomtv.com. TelecomTV. p. 1. Retrieved September 24, 2015.
  9. ^ Lawson, Stephen (September 22, 2015). "LTE standard for Internet of Things machines gets the green light". PCWorld / IDG. p. 1. Retrieved September 24, 2015 – via pcworld.com.
  10. ^ GSA: Global Narrowband IoT – LTE-M networks – March 2019 (retrieved 27 March 2019)
  11. ^ "Preliminary specification". 3GPP.
  12. ^ Luo, Chao (March 20, 2017). "3GGP TS45.001: GSM/EDGE Physical layer on the radio path" (ZIPped DOC). 3gpp.org. 14.1.0. 3GPP TSG RAN WG6. p. 58. Retrieved May 27, 2017.
  13. ^ GSA: Global Narrowband IoT – LTE-M networks – March 2019 (retrieved 25 March 2019)
  14. ^ a b c GSA: NB-IoT and LTE-M: Global Ecosystem and Market Status, April 2019 (retrieved 24 April 2019)

External links[edit]