10.2.2 Slot structure and physical resource elements

36.2113GPPEvolved Universal Terrestrial Radio Access (E-UTRA)Physical channels and modulationRelease 17TS

10.2.2.1 Resource grid

The transmitted signal on one antenna port in each slot is described by a resource grid of size one resource block as defined in clause 6.2.3.

Only is supported.

Narrowband positioning reference signals are transmitted on antenna port . The channel over which a symbol on antenna port is conveyed can be inferred from the channel over which another symbol on the same antenna port is conveyed only within consecutive subframes where

– if the higher layer parameter nprsBitmap is configured , equals the length of the nprsBitmap;

– if the higher layer parameter nprsBitmap is not configured, where is configured by higher layers.

10.2.2.2 Resource elements

Resource elements are defined according to clause 6.2.2.

10.2.2.3 Guard period for half-duplex FDD operation

Only type-B half-duplex FDD operation is supported.

10.2.2.4 Guard period for TDD operation

For frame structure type 2, if a NB-IoT UE is configured with higher layer parameter twoHARQ-ProcessesConfig, a guard period is created by the UE by

– not receiving the first part of the first OFDM symbol of a downlink subframe immediately following an uplink subframe from the same UE for 15-kHz subcarrier spacing on an NB-IoT carrier for which higher-layer parameter operationModeInfo indicates guardband or standalone, or higher-layer parameter inbandCarrierInfo is not present.