7.1 Overview

38.2113GPPNRPhysical channels and modulationRelease 17TS

7.1.1 Overview of physical channels

A downlink physical channel corresponds to a set of resource elements carrying information originating from higher layers. The following downlink physical channels are defined:

– Physical Downlink Shared Channel, PDSCH

– Physical Broadcast Channel, PBCH

– Physical Downlink Control Channel, PDCCH.

7.1.2 Overview of physical signals

A downlink physical signal corresponds to a set of resource elements used by the physical layer but does not carry information originating from higher layers.

The following downlink physical signals are defined:

– Demodulation reference signals, DM-RS

– Phase-tracking reference signals, PT-RS

– Positioning reference signal, PRS

– Channel-state information reference signal, CSI-RS

– Primary synchronization signal, PSS

– Secondary synchronization signal, SSS