IEEE 802.1AS defines precise time synchronization in time-sensitive Ethernet and TSN networks.

IEEE 802.1AS is the TSN standard for timing and synchronization and defines the use of gPTP in Ethernet-based, time-critical networks. The standard ensures that endpoints and switches can be synchronized to a common time base with high accuracy. In the vehicle, 802.1AS is particularly important for ADAS sensor fusion, audio, logging, and other applications where precise timing relationships are crucial.