Adaptive processing method of currentUtcOffset parameter of ptp over PTN
A processing method and self-adaptive technology, applied in electrical components, time-division multiplexing systems, multiplexing communications, etc., can solve inconsistent UTC time, do not meet the sub-microsecond level design goals and use requirements of the PTP protocol, Second-level error and other issues
Active Publication Date: 2020-10-30
JIAOZUO POWER SUPPLY COMPANY OF STATE GRID HENAN ELECTRIC POWER +1
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Problems solved by technology
[0006] At present, currentUtcOffset is mostly set manually, and in order to ensure that the parameters of each PTP device in the PTN link are consistent, and the changed currentUtcOffset value can be configured correctly in time when the leap second is triggered, it is a cumbersome task for operation and maintenance. Work, once the work is negligent, the inconsistent UTC time may be calculated after the network switches the grandmaster device
The PTP protocol is designed for application scenarios where the time synchronization accuracy is required to be at the sub-microsecond level. The unit of currentUtcOffset is the second level. Therefore, an error in this parameter will cause a second-level error in the parsed UTC time, which seriously fails to meet the sub-microsecond level of the PTP protocol. Microsecond-level design goals and usage requirements
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[0037] The present invention will be further described below with specific examples, and the schematic examples and illustrations of the present invention are used to explain the present invention, but not as a limitation to the present invention.
[0038] Such as Figure 1 to Figure 8 The currentUtcOffset parameter adaptive processing method of PTP over PTN shown, the PTN link based on the method includes at least two sets of PTP equipment with Beidou or GPS satellite system for mutual backup, and the PTP equipment is the satellite PTP of the PTN link bell;
[0039] The method comprises the steps of:
[0040] Step 1, prioritizing the satellite PTP clocks of the mutual backup respectively, selecting one of them as the grandmaster in the PTN link by the BMC algorithm;
[0041] Step 2: The selected satellite PTP clock serving as the grandmaster in the PTN link automatically obtains the correct currentUtcOffset and saves it through the Beidou satellite or GPS satellite, and bro...
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The invention discloses a self-adaptive processing method for currentUtcOffset parameter of PTP over PTN. A PTN link on which the method is based comprises at least two sets of GPS satellite system PTP devices which are mutually standby, and the PTP devices are satellite PTP clocks of the link. The method comprises: setting the priorities of the PTP clocks which are mutually prepared, selecting the grand master in one of the acting links, automatically obtaining correct currentUtcOffset parameters, storing the correct currentUtcOffset parameters, and broadcasting the correct currentUtcOffset parameters; the standby PTP equipment acquiring broadcast data and storing the broadcast data as parameters of the standby PTP device; and when the grand master does not work, the other standby PTP devices can be switched. Parameters are automatically converted from information obtained by a GPS or a Beidou, manual setting is not needed, and parameters of the standby PTP equipment are also automatically obtained. The standby PTP device is specified, and illegal parameters do not act on a PTP time transmission link.
Description
technical field [0001] The invention belongs to the technical field of time synchronization, in particular to a currentUtcOffset parameter adaptive processing method of PTP over PTN. Background technique [0002] The precision clock synchronization protocol IEEE1588 (hereinafter referred to as PTP) of the network measurement and control system has a variety of PTP devices such as Ordinary clock (grandmaster, master, slave), Boundary clock, End-to -end transparent clock, Peer-to-peer transparent clock. Various devices play their own roles in the communication process. The currentUtcOffset parameter is used when the PTP time needs to be parsed in the link. This parameter is an important parameter for converting the PTP epoch into UTC time, and is carried by the Announcemessage. This is a dynamic parameter variable whose value changes triggered by the leap second event. [0003] The leap second event is uniformly released by the International Bureau of Weights and Measures, a...
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IPC IPC(8): H04J3/06
CPCH04J3/0667
Inventor 杨林朱哲然王红印范不井雷炜卿龙洁任瑞敏董奥冬杨铁军
Owner JIAOZUO POWER SUPPLY COMPANY OF STATE GRID HENAN ELECTRIC POWER