Multi-time-source PTP time service circuit based on Loongson SOC

By using a multi-time-source PTP timing circuit based on Loongson SOC, the problem of interface compatibility between new and old equipment during the upgrade of military equipment was solved, high-precision timing was achieved, and a stable timing solution for ruggedized servers was provided.

CN121300029APending Publication Date: 2026-01-09BEIJING INST OF COMP TECH & APPL
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Patent Information

Application Number
CN202511557454.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-10-29
Publication Date
2026-01-09

AI Technical Summary

Technical Problem

During the upgrading and replacement of military equipment, the compatibility issues of interfaces between old and new timing systems have not been effectively resolved.

Method used

Design a multi-time-source PTP timing circuit based on Loongson SOC. Through a timing network composed of Loongson SOC chip, FPGA, high-stability crystal oscillator, RS422 transceiver, network card, switch, etc., it is compatible with three timing modes: B code, PPS+TOD and PTP. The switch distributes time message information to achieve high-precision time synchronization between devices.

Benefits of technology

It achieves high-precision time synchronization between devices, solves the compatibility problem of interfaces between new and old devices, provides a stable time synchronization solution for ruggedized servers, and supports the transition between new and old time synchronization solutions.

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Abstract

The invention relates to a multi-time-source PTP time service circuit based on a Loongson SOC, and belongs to the technical field of timing systems. The time service circuit comprises a Loongson SOC, an FPGA, a high-stability crystal oscillator, an RS422 transceiver, a network card, a switch, computing blades 1-6 and an external clock source. According to the design scheme, the performance is stable and reliable, the mode is novel, the problem that interfaces between devices are incompatible in the equipment development process is solved, meanwhile, a design thought is provided for the time service scheme of the reinforced server, and a new solution is provided for transition of a new time service scheme and an old time service scheme. The scheme has been successfully applied to a certain reinforced server.
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