IEEE 1588-2008
网络测量和控制系统用精密时钟同步协议

Precision clock synchronization protocol for networked measurement and control systems

标准号

IEEE 1588-2008

发布日期

2008年

实施日期

废止日期

无

中国标准分类号

M11

国际标准分类号

39.040.99

发布单位

US-IEEE

引用标准

IEC 61158-3-2-2007 IEC 61158-4-2-2007 IEC 61158-5-2-2007 IEC 61158-5-10-2007 IEC 61158-6-2-2007 IEC 61158-6-10-2007 IEC 61784-1-2007 IEC 61784-2-2007 IEC 62026-3-2007 IEEE Std 802® IEEE Std 802.1ABTM IEEE Std 802.1QTM-2005 IEEE Std 802.3TM-2005 ISO/IEC 10

被代替标准

IEEE 1588-2002

适用范围

This standard defines a protocol enabling precise synchronization of clocks in measurement and control systems implemented with technologies such as network communication, local computing, and distributed objects. The protocol is applicable to systems communicating by local area networks supporting multicast messaging including, but not limited to, Ethernet. The protocol enables heterogeneous systems that include clocks of various inherent precision, resolution, and stability to synchronize to a grandmaster clock. The protocol supports system-wide synchronization accuracy in the sub-microsecond range with minimal network and local clock computing resources. The default behavior of the protocol allows simple systems to be installed and operated without requiring the administrative attention of users. The standard includes mappings to User Datagram Protocol (UDP)/Internet Protocol (IP), DeviceNet, and a layer-2 Ethernet implementation. It includes formal mechanisms for message extensions, higher sampling rates, correction for asymmetry, a clock type to reduce error accumulation in large topologies, and specifications on how to incorporate the resulting additional data into the synchronization protocol. The standard permits synchronization accuracies better than 1 ns. The protocol has features to address applications where redundancy and security are a requirement. The standard defines conformance and management capability. There is provision to support unicast as well as multicast messaging. The standard includes an annex on recommended practices. Annexes defining communication-medium-specific implementation details for additional network implementations are expected to be provided in future versions of this standard.

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