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Airborne network IEEE1588 protocol 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: 2016-06-01
CHINESE FLIGHT TEST ESTAB
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention mainly uses the FPGA chip to design a slave clock module supporting the IEEE1588 protocol to solve the problem of precise time synchronization in the existing networked airborne test system

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

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Embodiment Construction

[0023] A kind of airborne network IEEE1588 agreement slave clock port synchronous method, the slave clock module of IEEE1588 agreement comprises uplink analysis unit, PTP message processing unit, downlink encapsulation unit, PTP time mark unit, processor and MAC hard core (referring to figure 1 ),Proceed as follows:

[0024] (1) The MAC hard core receives the synchronization (Sync) message sent by the main clock port of the PTP domain, and at the same time, the PTP time stamp unit records the synchronization (Sync) message arriving at the GMII / MII interface timestamp t2, and reports t2 to the local control processor unit in the module;

[0025] (2) The MAC hard core receives the follow (Follow_Up) message sent by the main clock port of the PTP domain, uploads the received message to the uplink analysis module, extracts the time stamp t1 contained in the follow (Follow_Up) message, and puts t1 reports to the processor unit in the local control module;

[0026] (3) The delay r...

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Abstract

The invention provides an airborne network IEEE1588 protocol slave clock port synchronization method, and an IEEE1588 protocol slave clock module comprises an uplink analysis unit, a PTP message processing unit, a downlink packaging unit, a PTP time mark unit, a processor, and an MAC hardcore. The method comprises the following steps: (1) the MAC hardcore receives a synchronization message transmitted by a main clock port of a local PTP domain, and the PTP time mark unit records a time stamp t2 when the synchronization message arrives at a GMII / MII interface, and transmits the time stamp t2 to a processor unit in the local control module; (2), the MAC hardcore receives a following message transmitted by the main clock port of the local PTP domain, transmits the received following message to the uplink analysis unit, extracts a time stamp t1 in the following message, and transmits the time stamp t1 to the processor unit in the local control module.

Description

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

Claims

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Application Information

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IPC IPC(8): H04L7/00
Inventor 单文军冯晓林杨廷罗霄刘斌
Owner CHINESE FLIGHT TEST ESTAB