NB IoT tutorial-features,Spectrum,applications of NB IoT
This basic NB IoT tutorial covers features of NB IoT (NarrowBand Internet of Things). It mentions frequency specrums and applications or use cases of NB-IoT. It provides difference between NB-IoT with earlier LTE versions i.e. Cat-1,Cat-0 and Cat-M.
What is NB IoT?
• NB-IoT stands for Narrowband-IoT.
• It is specified in LTE Rel.13. It is successor to LTE Cat-M version specified in Rel.12.
• It has been developed to meet the requirements of LPWA (Low Power Wide Area) type of networks.
• NB-IoT has geo-graphical coverage better compare to LTE-M with lower data rates.
• This allows long battery life (about 10 years).
• The NB-IoT devices support narrower frequency spectrum of bandwidth 180 KHz to 200 KHz and hence the name.
Features of NB IoT
Following table mentions features of NB IoT (i.e. LTE Cat-NB).
|Extended Coverage and distance||20dB better compare to GSM/GPRS, covers about less than 22 Km from cell|
|Frequency Spectrum||700MHz, 800MHz, 900MHz|
|Bandwidth||180 KHz to 200 KHz|
|Capacity-Number of Connections||50K connections per cell, supports about 40 devices per household|
|Power Consumption||very low power comsumption and hence extends battery life to 10 years|
|Latency||less than 10 seconds (uplink)|
|Data rate||200 Kbps|
|Transmit Power||+20 dBm or +23 dBm|
|device Cost||low, which is under $5 per module|
NB IoT Frequency Spectrum
The figure-1 depicts types of frequency spectrums supported by NB IoT.
As shown it supports Standalone, In-Band and Guard Band.
• The standalone deployment type utilizes new bandwidth.
• The guard band deployment type uses bandwidth reserved in the guard band of existing LTE network.
• The in-Band deployment type uses same RBs (resource blocks) in LTE carrier of existing LTE network bands.
NB IoT Applications | NB IoT Use cases
Following are the use cases or applications of NB IoT:
• Personal use: Wearables, smart bicycle, tracking of kids and elders
• Public use: Examples include smart metering, alarms and event detectors, smart garbage bins,
• IoT appliances: Refrigerators, temperature sensing smart devices etc.
• Industrial use: Examples include logistics tracking, asset tracking, smart agriculture,
Difference between NB IoT (LTE Cat-NB), LTE Cat-1, LTE Cat-0, LTE Cat-M
Following table mentions difference between NB IoT (LTE Cat-NB), LTE Cat-1, LTE Cat-0 and LTE Cat-M.
|Specifications||LTE Cat-1||LTE Cat-0||LTE Cat-M||LTE Cat-NB|
|Bandwidth||20 MHz||1.4 MHz||1.08 MHz||180 KHz|
|Data rate||10 Mbps||1 Mbps||1 Mbps||200 Kbps|
|Frequency Spectrum||LTE In Band Only||LTE In-Band, Guard Band, Standalone|
|Coverage||Same as LTE coverage, LTE Cat-M has deeper penetration||+20dB than LTE, <22 Km|