1.1 - PTP VERSION 3 IN FTI?
- etc2016 - 36. European Telemetry and Test Conference
2016-05-10 - 2016-05-12
- 1. Positioning & Timing
- O. Holmeide - OnTime Networks AS, Oslo (Norway), M. Schmitzr - OnTime Networks LLC, Dallas (USA)
- 8 - 17
Time synchronization based on the Precision Time Protocol (PTP) according to the IEEE 1588 standard is a core building block for state-of-the-art high-performance Flight Test Instrumentation (FTI) systems. Two versions of the IEEE 1588 standard have been launched: PTP version 1 according to IEEE 1588™ - 2002 and PTP version 2 according to IEEE 1588™ - 2008. Now a new IEEE 1588™ working group has been established with the goal to launch a new revision of the IEEE 1588™ standard; i.e. PTP version 3.
The FTI industry is using both PTP version 1 and 2. The poor backward compatibility between PTP version 2 and 1 has been a big challenge for the FTI community. Backward compatibility with older PTP versions, new functions and to what extent PTP version 3 is relevant for the FTI industry are described and discussed in this paper.
The IEEE 1588 standards define several PTP profiles for various time synchronization usages in different industries. This paper also describes how PTP is used in FTI and also proposes a PTP profile definition for FTI including special time synchronization parameters/properties taken from the iNET standardization.