Improving Synchronization With 1588 Transparent Clocks

摘要

The IEEE 1588 Precision Time Protocol enables precise time synchronization over the packet-based Ethernet network so that the time on a slave clock at one end of the network agrees with a master clock at the other end. But, how precise?rnOn a LAN, clocks using IEEE 1588 can agree within 100 ns of each other even if the network is highly congested. That compares with network time protocol (NTP), the Internet's ubiquitous method of sync distribution, which typically can achieve 0.5 ms to 2 ms precision over a LAN.