TSN - Time Sensitive Networking

TSN stands for time-sensitive networking. It is a set of different standards for transmitting data in Ethernet networks. These standards are currently being defined by the standardization organization for Ethernet-based communication IEEE 802.1. TSN also consists of a series of individual standards that mainly expand the data link layer (Layer 2 of the ISO-OSI model) of the communication system. TSN is thus not a complete communication protocol but rather a basic technology that can be used by higher-level applications. Higher protocols, such as PROFINET and OPC UA, are found on Layers 5 through 7 of the ISO-OSI model and remain unchanged.

  • Time Synchronization (IEEE 802.1AS)
    • IEEE 802.1AS Timing and Synchronization for Time-Sensitive Applications
  • TSN based scheduling and traffic shaping (IEEE 802.1Qbv, Qbu, Qcr)
    • IEEE 802.1Qbv Enhancements to Traffic Scheduling: Time-Aware Shaper (TAS)
    • IEEE 802.1Qbv in more detail: Time slices and guard bands
    • IEEE 802.3br and 802.1Qbu Interspersing Express Traffic (IET) and Frame Preemption
    • Shortcomings of IEEE 802.1Qbv/bu
    • IEEE 802.1Qcr Asynchronous Traffic Shaping
  • AVB credit-based scheduler (IEEE 802.1 Qav, Qat)
    • IEEE 802.1Qav Forwarding and Queuing Enhancements for Time-Sensitive Streams
    • IEEE 802.1Qat Stream Reservation Protocol
  • Enhancements to AVB scheduling (IEEE 802.1 Qcc, Qch, Qci)
    • IEEE 802.1Qcc Enhancements to SRP
    • IEEE 802.1Qch Cyclic Queuing and Forwarding (CQF)
    • IEEE 802.1Qci Per-Stream Filtering and Policing (PSFP)