4.10 NB-IoT

36.3003GPPEvolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN)Overall descriptionRelease 17Stage 2TS

NB-IoT provides access to network services using physical layer optimized for very low power consumption (e.g. full carrier bandwidth is 180 kHz, subcarrier spacing can be 3.75 kHz or 15 kHz).

As indicated in the relevant clauses in this specification, a number of E-UTRA protocol functions supported by all Rel-8 UEs are not used for NB-IoT and need not be supported by eNBs and UEs only using NB-IoT.

In this version of the specification, a number of functions including inter-RAT mobility, handover, measurement reports, public warning functions, GBR, CSG, support of HeNBs, relaying, carrier aggregation, dual connectivity, NAICS, real-time services, interference avoidance for in-device coexistence, RAN assisted WLAN interworking, sidelink communication/discovery, V2X sidelink communication, MDT, emergency call, CS fallback, ACB, EAB, ACDC, SSAC, aerial UE Communication, EN-DC and RRC_INACTIVE are not supported for NB-IoT. This is not further stated in the corresponding procedures.