Highly precised time synchronization device, system and method for computer network

A time synchronization system and time synchronization technology, applied in time division multiplexing systems, multiplexing communications, electrical components, etc., can solve the problems of poor universality and low precision of time synchronization, and eliminate cache delays and interruptions. The effect of delayed response time and improved accuracy

Inactive Publication Date: 2009-03-18
SHANGHAI YINGLIAN SOMATOSENSORY INTELLIGENT TECH CO LTD
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Problems solved by technology

[0007] In order to overcome the defects of poor universality and low precision of time synchronization in existing computer network

Method used

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  • Highly precised time synchronization device, system and method for computer network
  • Highly precised time synchronization device, system and method for computer network
  • Highly precised time synchronization device, system and method for computer network

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Embodiment Construction

[0040] A high-precision time synchronization device, system and method for computer networks provided by the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0041] figure 1 Shows the overall scheme of high-precision time synchronization according to the embodiment of the present invention, such as figure 1As shown, first use hardware circuits (such as FPGA, PLA and other similar structures) to realize the time stamp generation circuit, generate time synchronization equipment, move the time stamp recording position to the physical link layer, and eliminate the cache delay and interruption in the common software method time stamp The impact of response time delay; connect each synchronization device to each other, set a master synchronization device, connect all devices that need to be synchronized to form a time synchronization system, and apply a prediction-based time synchronization algorithm (Predi...

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Abstract

The invention provides a high-accuracy time synchronizing apparatus, a method and a system for testing the computer network performance, monitoring system and network simulation, which comprises the following steps: utilizing a hardware circuit to realize a timestamp generating circuit, moving a timestamp recording position to a physical chain circuit layer, removing impact of the cache delay in the timestamp of a common software and impact caused by interrupting the response time delay, and realizing the accurate clock synchronization of each measuring node through the prediction-based time synchronous algorithm (Prediction-based Clock Synchronization,PCS). The apparatus improves the accuracy of the timestamp, can guarantee the error of the synchronous timestamp of each measured node notto exceed 100ns, and can reach the accuracy which is equal to adopting GPS synchronization, and the realization is simple and the cost is low.

Description

technical field [0001] The present invention relates to the technical field of computer network applications, and more specifically, the present invention relates to a high-precision time synchronization device, system and method for computer networks. Background technique [0002] Applications such as distributed network systems, computer network performance measurement and test systems, and network simulations all require high-precision time synchronization. For example, when sending and receiving data packets in computer network performance measurement, accurate time stamp marks are the basis for network parameter measurement such as delay, bandwidth, and jitter. In a multi-node computer network measurement system, the clocks of each node need to maintain high synchronization accuracy in addition to their own high precision. Otherwise, network performance such as delay and jitter calculated by comparing the timestamp difference between nodes parameters will be inaccurate...

Claims

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Application Information

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IPC IPC(8): H04J3/06
Inventor 谢应科王建东祝超谢高岗
Owner SHANGHAI YINGLIAN SOMATOSENSORY INTELLIGENT TECH CO LTD
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