A/330:2019, “Link-Layer Protocol”

Approved 3 May 2019

This standard defines the ATSC Link-Layer Protocol (ALP). ALP corresponds to the data link layer in the OSI 7-layer model. ALP provides a path to deliver IP packets, link layer signaling packets, and MPEG-2 Transport Stream (TS) packets down to the RF Layer and back, after reception. ALP also optimizes the proportion of useful data in the ATSC 3.0 Physical Layer by means of efficient encapsulation and overhead reduction mechanisms for IP and MPEG-2 TS transport. ALP provides extensible headroom for future use.

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