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
CN101388741AInactive Publication Date: 2009-03-18SHANGHAI YINGLIAN SOMATOSENSORY INTELLIGENT TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANGHAI YINGLIAN SOMATOSENSORY INTELLIGENT TECH CO LTD
Publication Date
2009-03-18
Estimated Expiration
Not applicable · inactive patent

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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.
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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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