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Airborne network IEEE1588 protocol master-slave clock port synchronization method

An IEEE1588, airborne network technology, applied in the direction of synchronization devices, digital transmission systems, electrical components, etc., can solve problems such as precise time synchronization

Inactive Publication Date: 2016-05-11
CHINESE FLIGHT TEST ESTAB
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Problems solved by technology

[0005] The present invention is mainly an airborne network IEEE1588 protocol master-slave clock port synchronization method to solve the problem of precise time synchronization in the existing networked airborne test system

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  • Airborne network IEEE1588 protocol master-slave clock port synchronization method
  • Airborne network IEEE1588 protocol master-slave clock port synchronization method
  • Airborne network IEEE1588 protocol master-slave clock port synchronization method

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Embodiment Construction

[0026] The IEEE1588 protocol master-slave clock includes an upstream parsing unit, a PTP message processing unit, a downstream packaging unit, a PTP time stamping unit, and a processor unit (see figure 1 with figure 2 ).

[0027] The specific steps of the master-slave clock synchronization method of the IEEE1588 protocol of the present invention are as follows:

[0028] (1) The downstream packaging unit determines the effective flag bit of each clock configured in the internal memory by the software according to the packet sending frequency configured by the software, that is, the interval. If it is valid, read the relevant information of the clock in the memory, such as MAC address, IP address, UDP port number, group the packet and record the time of the moment as the sending timestamp, group the timestamp into the packet, send a synchronization (Sync) message to the physical layer through the MAC hard core, and PTP time The mark unit records that the synchronization (Sync) messa...

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Abstract

The invention provides an airborne network IEEE1588 protocol master-slave clock port synchronization method. An IEEE1588 protocol master-slave clock includes an uplink analysis unit, a PTP message processing unit, a downlink package unit, a PTP time scale unit and a processor unit. The method comprises the following steps that: the downlink package unit judges the valid flag bits of software configuration in each clock of an inner memory sequentially according to the packet transmitting frequency (interval) of the software configuration, reads relevant information of the clocks from the memory if the flag bits are valid, packages the information and records a current time as a sending time stamp, packages the sending time stamp in a packet; a synchronization message is sent to a physical layer through an MAC hard core; and the PTP time scale unit records a time stamp t1 when the synchronization message leaves a GMII / MII interface.

Description

Technical field [0001] The invention relates to an airborne network IEEE1588 protocol master-slave clock port synchronization method, which belongs to the field of networked airborne testing. Background technique [0002] In the new generation of networked general airborne test system, in order to improve the accuracy of time synchronization between data acquisition equipment, the IEEE1588 precision time synchronization protocol is adopted to provide technical support for the realization of high precision and high synchronization testing. IEEE1588 defines a protocol that can achieve high-precision clock synchronization in measurement and control systems—Precision Time Protocol (PTP). PTP integrates technologies such as network communication, local computing and distributed objects, and is suitable for all distributed systems that support multicast communication in the local area network, and is especially suitable for Ethernet. It can synchronize all kinds of time with different...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L7/00
Inventor 单文军杨廷梧张宇杨玉丽张莉
Owner CHINESE FLIGHT TEST ESTAB
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