How accurate is IEEE 1588?
Each sensor uses an onboard 1588 clock slaved to a grandmaster clock and is synchronized with the other sensors on the network to an accuracy of 1 microsecond.
What is IEEE 1588v2?
PTP, also known as IEEE 1588v2, is a packet-based technology that enables the operator to deliver synchronization services on packet-based mobile backhaul networks. The time synchronization is achieved through packets that are transmitted and received in a session between a primary clock and a client clock .
What is gPTP protocol?
The gPTP protocol must be used for time synchronization between the SoC and AURIX. gPTP is part of the Audio Video Bridging (AVB) Standard: IEEE 802.1AS: Timing and Synchronization for Time-Sensitive Applications (gPTP). On the platform, gPTP over Ethernet is used for time synchronization.
What is hardware timestamping?
Hardware timestamping of PTP event messages is key to achieving nanosecond synchronization accuracy for PTP slave clocks. Hardware timestamping is implemented with hardware TSUs timed by clock signals generated by PHCs.
What is a PTP grandmaster?
The timing source in the network is generated by a PTP Grandmaster, a network element with an integrated GNSS receiver that sends PTP timing packets throughout the network. Scalability – the Grandmaster ability to support small sized networks that can scale up to vast number of slave elements.
What is PTP IEEE standard and what are available profile for PTP?
The PTP Industrial Profile (PIP) is a standard of the IEC 62439-3 that specifies in its Annex C two Precision Time Protocol IEEE 1588 / IEC 61588 profiles, L3E2E and L2P2P, to synchronize network clocks with an accuracy of 1 μs and provide fault-tolerance against clock failures. …
What is PTP clock?
PTP stands for “Precision Timing Protocol”, and is described in IEEE Standard 1588. It is a protocol for distributing time across a packet network. It works by sending a message from a master clock to a slave clock, telling the slave clock what time it is at the master.
How does Precision Time Protocol work?
The Precision Time Protocol, PTP, is designed to synchronize clocks on a local area network (LAN) to sub-microsecond precision….PTP messages
- The master initiates the sync by sending a sync message.
- The slave sends a delay request message back to the master.
- The master responds with a delay response message.
What is ordinary clock?
An ordinary clock is a one port device which does not queue messages for transmitting from another port. So as long as the PTP event messages are timestamped at the MII interface in the network stack, accuracy should be good. Boundary clocks recover the PTP domain time on the slave port.