NB1 vs. NB2 Complete Comparison Table and Overview

 

The 3GPP Release 14 specification enhances the NB-IoT protocol and introduces a new device category, NB2. Here is a complete NB1 vs. NB2 comparison table and a brief overview of the new NB-IoT protocol features in R14.

 

What are LTE Cat NB1 and NB2?

LTE Cat NB1 refers to IoT devices based on the NB-IoT protocol standardized in the 3GPP Release 13 specification. It is a wireless cellular low-power wide-area connectivity protocol for IoT massive machine-type communications.

LTE Cat NB2 refers to devices which are based on the enhanced NB-IoT protocol as standardized in the 3GPP Release 14.

 

NB1 vs. NB2 Comparison Table 

Here is a comprehensive comparison table to see the differences between the NB-IoT 3GPP R13 and R14 specifications, and NB1 vs. NB2 devices.

Features LTE Cat NB1 LTE Cat NB2
Channel Bandwidth 180 KHz 180 KHz
Transmission Duplexity Half Half
Max downlink TBS 680 bits 2536 bits
Max downlink data rate ~26 kbps ~80/127 kbps (1HARQ/2HARQ)
Max uplink TBS 1000 bits 2536 bits
Max uplink data rate ~62 kbps ~105/159 kbps (1HARQ/2HARQ)
Qty HARQ Processes 1 1 or 2
Number of Antennae 1 1
Latency range<10 sec TBD
Data limit Not defined Not defined
Size of payload in a data packet Not defined Not defined
Duty cycle Not defined Not defined
Data Encryption EPS-AKA EPS-AKA
Device Authentication SIM SIM
Voice communication support No No
Positioning Cell ID OTDOA, E-CID
Standardization organization3GPP Release 133GPP Release 14
UE bandwidth 200 kHz 200 kHz
Maximum Transmission power 20, 23 dBm 14, 20, 23 dBm

 

Main Enhancements in LTE Cat NB2

Here is a short introduction on how the 3GPP R14 specification enhances the NB-IoT protocol for NB2:

  • NB2 POSITIONING

    The 3GPP Release 14 introduces OTDOA and E-CID positioning methods into NB2 for higher location accuracy.

  • MULTICAST IN NB2

    The NB2 devices contain Multicast transmission mode, which the NB1 device does not have.

  • ENHANCED NB2 MOBILITY

    NB2 devices provide better mobility – Reconnection is now supported also in the device connected mode, as opposed to idle mode only in NB1.

  • LTE CAT NB2 PEAK DATA RATES

    The NB-IoT 3GPP Release 14 specification introduces higher data rates – NB2 devices can maximum data speeds of ~127 kbps uplink and ~159 kbps uplink.

  • NB-IOT MULTI-CARRIER OPERATION

    NB2 supports a multi-carrier mode with up to 15 non-anchor carriers, which can support up to 1,000,000 connected NB-IoT devices per square kilometer.

  • NB2 FREQUENCY BANDS

    Five new FDD frequency bands are introduced for NB-IoT: 11, 21, 25, 31, and 70.

  • NEW NB2 DEVICE POWER CLASS

    3GPP R14 enhances NB2 devices with a new 14 dBm power class to allow the use of smaller batteries and small form factors.

 

Read more:

IoT Protocols OverviewNB-IoT 3GPP Release 14NB-IOT CHIPSET list

 

LTE Cat 1LTE Cat M1EC-GSM-IoT
NB-IoTZigbeeSigFox
LoRaGoogle ThreadBluetooth LE
Wirepas Mesh

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