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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >An Algorithm for Synchronizing a Clock When the Data Are Received Over a Network With an Unstable Delay
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An Algorithm for Synchronizing a Clock When the Data Are Received Over a Network With an Unstable Delay

机译：通过具有不稳定的延迟的网络接收数据时的时钟同步算法

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摘要

A method is presented for synchronizing the time of a clock to a remote time standard when the channel connecting the two has significant delay variation that can be described only statistically. The method compares the Allan deviation of the channel fluctuations to the free-running stability of the local clock, and computes the optimum interval between requests based on one of the three selectable requirements: 1) choosing the highest possible accuracy; 2) choosing the best tradeoff of cost versus accuracy; or 3) minimizing the number of requests to realize a specific accuracy. Once the interval between requests is chosen, the final step is to steer the local clock based on the received data. A typical adjustment algorithm, which supports both the statistical considerations based on the Allan deviation comparison and the timely detection of errors, is included as an example.
机译：当连接两者的信道具有显着的延迟变化时，提出了一种用于使时钟的时间与远程时间标准同步的方法，该延迟变化只能用统计学来描述。该方法将通道波动的Allan偏差与本地时钟的自由运行稳定性进行比较，并根据以下三个可选要求之一来计算请求之间的最佳间隔：1）选择尽可能高的精度; 2）选择成本与准确性的最佳权衡；或3）减少请求数量以实现特定的准确性。一旦选择了请求之间的间隔，最后一步就是根据接收到的数据来控制本地时钟。包括一个典型的调整算法，该算法同时支持基于Allan偏差比较的统计考虑和错误的及时检测。

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