网络测量和控制系统的精密时钟同步协议

[中文适用范围]： 该标准定义了一种网络协议，即精确时间协议（PTP），可以实现网络分布式系统中设备的实时时钟的精确同步。该协议适用于设备通过网络进行通信的系统，包括 [外文原描述]： IEC 61588:2021 defines a network protocol, the Precision Time Protocol (PTP), enabling accurate and precise synchronization of the real-time clocks of devices in networked distributed systems. The protocol is applicable to systems where devices communicate via networks, including Ethernet. The standard allows multicast communication, unicast communication or both. The standard specifies requirements for mapping the protocol to specific network implementations and defines such mappings, including User Datagram Protocol (UDP)/Internet Protocol (IP versions 4 and 6), and layer-2 IEEE 802.3 Ethernet.