This article may be too technical for most readers to understand.(February 2019)
LTE-M (LTE-MTC [Machine Type Communication]), which includes eMTC (enhanced Machine Type Communication), is a type of low power wide area network (LPWAN) radio technology standard developed by 3GPP to enable a wide range of cellular devices and services (specifically, for machine-to-machine and Internet of Things applications). The specification for eMTC (LTE Cat M1) was frozen in 3GPP Release 13 (LTE Advanced Pro), in June 2016. Other 3GPP IoT technologies include NB-IoT and EC-GSM-IoT.
The advantage of LTE-M over NB-IoT is its comparatively higher data rate, mobility, and voice over the network, but it requires more bandwidth, is more costly, and cannot be put into guard band portion of the frequency band for now. Compared to LTE Release 12 Cat-0 modem, an LTE-M model is claimed to be 80% less expensive (in terms of the bill of materials), support up to 18 dB better coverage, and a battery lifetime that can last up to several years. In March 2019, the Global Mobile Suppliers Association reported that over 100 operators had deployed/launched either NB-IoT or LTE-M networks.
3GPP Narrowband Cellular Standards
|LTE Cat 1||LTE Cat 1 bis||LTE-M||NB-IoT||EC-GSM-IoT|
|LTE Cat 0||LTE Cat M1||LTE Cat M2||non-BL||LTE Cat NB1||LTE Cat NB2|
|3GPP Release||Release 8||Release 13||Release 12||Release 13||Release 14||Release 14||Release 13||Release 14||Release 13|
|Downlink Peak Rate||10 Mbit/s||10 Mbit/s||1 Mbit/s||1 Mbit/s||~4 Mbit/s||~4 Mbit/s||26 kbit/s||127 kbit/s||474 kbit/s (EDGE)
2 Mbit/s (EGPRS2B)
|Uplink Peak Rate||5 Mbit/s||5 Mbit/s||1 Mbit/s||1 Mbit/s||~7 Mbit/s||~7 Mbit/s||66 kbit/s (multi-tone)
16.9 kbit/s (single-tone)
|159 kbit/s||474 kbit/s (EDGE)
2 Mbit/s (EGPRS2B)
|Latency||50–100 ms||not deployed||10–15 ms||1.6–10 s||700 ms – 2 s|
|Number of Antennas||2||1||1||1||1||1||1||1||1–2|
|Duplex Mode||Full Duplex||Full or Half Duplex||Full or Half Duplex||Full or Half Duplex||Full or Half Duplex||Half Duplex||Half Duplex||Half Duplex|
|Device Receive Bandwidth||1.4–20 MHz||1.4–20 MHz||1.4 MHz||5 MHz||5 MHz||180 kHz||180 kHz||200 kHz|
|Receiver Chains||2 (MIMO)||1 (SISO)||1 (SISO)||1 (SISO)||1 (SISO)||1 (SISO)||1 (SISO)||1–2|
|Device Transmit Power||23 dBm||23 dBm||23 dBm||20 / 23 dBm||20 / 23 dBm||20 / 23 dBm||20 / 23 dBm||14 / 20 / 23 dBm||23 / 33 dBm|
- 60 operators in 35 countries investing in LTE-M networks
- 34 of those operators in 24 countries had deployed/launched their networks
- LoRa / LoRaWAN
- LTE User Equipment Categories
- LTE sidelink
- 802.11ah (Wi-FI HaLow)
- "LTE-M – the new GSM".
- "eMTC (LTE Cat-M1)".
- "Standards for the IoT".
- "Extended Coverage - GSM - Internet of Things (EC-GSM-IoT)". gsma.com. GSMA. May 11, 2016. p. 1. Retrieved October 17, 2016.
- "Differences between NB-IOT and LTE-M".
- Saxena, Vidit; Bergman, Johan; Blankenship, Yufei; Wallen, Anders; Razaghi, Hazhir Shokri (2016). "Reducing the Modem Complexity and Achieving Deep Coverage in LTE for Machine-Type Communications". 2016 IEEE Global Communications Conference (GLOBECOM). pp. 1–7. doi:10.1109/GLOCOM.2016.7842206. ISBN 978-1-5090-1328-9. S2CID 5206557.
- "Global Narrowband IoT – LTE-M networks". GSA. March 2019. Retrieved 25 March 2019.
- "Preliminary specification". 3GPP.
- 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.