CAJ | 학술논문

首先分析了同步数字体系（SDH）网络的时频特性,然后提出了一种利用SDH实现高精度时间同步的方法。经实验验证,经过300 km,5个SDH网元传递后时间同步偏差平均值1.4 ns,最大值不超过11 ns。文章分析了技术实现的关键问题,并给出解决方案,然后通过测试及分析,验证了此方案的可行性和性能。
수선분석료동보수자체계（SDH）망락적시빈특성,연후제출료일충이용SDH실현고정도시간동보적방법。경실험험증,경과300 km,5개SDH망원전체후시간동보편차평균치1.4 ns,최대치불초과11 ns。문장분석료기술실현적관건문제,병급출해결방안,연후통과측시급분석,험증료차방안적가행성화성능。
In this paper, time frequency characteristics of Synchronous Digital Hierarchy (SDH) net- work were analyzed firstly. Then, a new method to achieve time synchronization based on SDH net-work was proposed. As shown in the verification test, the average value of time accuracy is 1.4 ns and the maximum is no more than 11 ns after the time signal transfers via 5 SDH Network Elements with the distance of 300 Kin. The key technology problem of the method was discussed and the solution was provided in the paper. The feasibility and performance of the proposed method was verified finally.