Time synchronization device, time synchronization method and time scale monitoring system based on tcp/ip

Abstract

The invention discloses a TCP / IP-based time setting device, a time setting method and a time scale monitoring system. The device includes: a time stamp requester service module, a time service module and a relay module; the time stamp requester service module interacts with the time service module of the upper-level time synchronization device through an encrypted security instruction sequence, thereby adjusting the time of the current time synchronization device Time stamp: the time service module sends a time scale adjustment command to the next-level time-setting device after decrypting the encrypted security command sequence sent by the next-level time-setting device. The present invention adopts an active method without crossing safety devices and purchasing additional hardware satellite clocks, and the high-safety area actively initiates the time synchronization requirement, realizes reverse time scale transmission, solves the problem of time synchronization of sub-stations accessed by subordinates, and reduces It reduces costs, improves security, and facilitates centralized management.

Description

technical field [0001] The invention relates to the technical field of network time synchronization, in particular to a time synchronization device, a time synchronization method and a time stamp monitoring system based on TCP / IP. Background technique [0002] The existing NTP / PPT and other related network time synchronization protocol systems require two-way data flow interaction to achieve accurate time synchronization. The physical single-item isolation device does not allow ordinary TCP / UDP network packets to pass through the gatekeeper in reverse. , it is impossible to safely issue the time stamp from the external network side of the physical isolation device to the internal network side, and the existing information system center satellite clock and core services are concentrated on the external network side of the sub-station isolation device, and the universal time synchronization protocol The time synchronization requirement of the network structure cannot be met. ...

AI Technical Summary

Problems solved by technology

[0002] The existing NTP / PPT and other related network time synchronization protocol systems require two-way data flow interaction to achieve accurate time synchronization. The physical single-item isolation device does not allow ordinary TCP / UDP network messages to pass through the gatekeeper in reverse, so the NTP time synchronization protocol , it is impossible to safely deliver time stamps from the external network side of the physical isolation device to the internal network side, and the existing information system center satellite clock and core business are deployed centrally on the external network side of the substation isolation device, and the general time synchronization protocol Unable to meet the time synchronization requirements of the network structure

[0003] like figure 1 As shown, the clock on the master station side is deployed at the L4 level. Through the configuration of firewalls and other network security devices, NTP / PPT timekeeping messages can be allowed to travel reversely between L4 and L2 (collecting data flow from the slave station to the master station), but Unable to penetrate L2 to point to L1

[0004] Conventional hardware solutions need to use unsafe cross-region timing or increase clock hardware (such as installing a clock on each sub-station on the L1 layer, or installing reverse isolation on each sub-station between L1-L2), but there are problems that cannot meet The basic requirements of network security protection or the problem that requires a lot of investment, and will lead to system complexity and increase of network weak links

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