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The physical layer
interfaces the Medium Access Control (MAC) sub-layer of Layer 2 and the Radio Resource Control (RRC) Layer of
Layer 3. The rounded rectangles between different layer/sub-layers indicate Service Access Points (SAPs). The physical layer offers a transport channel to MAC. The transport channel is characterized by how the information is transferred over the radio
interface. MAC offers different logical channels to the Radio Link Control (RLC) sub-layer of Layer 2. A logical
channel is characterized by the type of information transferred.
The present document provides a general description of the physical layer of 5G-NR radio interface. The present document also describes the document structure of the 3GPP physical layer specifications, i.e. TS 38.200 series.
full Table of Contents for TS 38.201 Word version: 16.0.0