Single-fiber ultra-high-precision time transfer method
A time transfer, high-precision technology, applied in time-division multiplexing systems, electrical components, multiplexing communications, etc., can solve the complex automatic dynamic compensation circuit, slow delay drift and drift accumulation, difficult to achieve high precision Time signal transmission and other issues, to achieve the effect of good market prospects and significant economic benefits
Active Publication Date: 2016-06-29
四川泰富地面北斗科技股份有限公司
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[0004] In order to solve the existing time and frequency synchronization technology of optical fiber communication network, due to the inherent pointer adjustment of SDH network elements, asymmetric two-way delay and other factors, it is difficult to realize the transmission of high-precision time signals, and the slow change of optical fiber transmission delay cannot be controlled , the circuit to realize automatic dynamic compensation is relatively complex and cannot solve the problems of extremely slow time delay drift and drift accumulation. The present invention proposes a single-fiber ultra-high-precision time transfer method
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[0026] attached figure 1 It is a schematic diagram of the point-to-point structure of the single-fiber ultra-high-precision time transfer method of the present invention. In the figure, 1 is the master time synchronization device, 2 is the slave time synchronization device, 3 is the single-fiber bidirectional optical transceiver module, and 4 is the delay processing module. 5 is the cesium atomic clock, M is the master station, and S is the slave station. As can be seen from the figure, the single-fiber ultra-high-precision time transfer method of the present invention connects the single-fiber bidirectional optical transceiver module 3, the delay processing module 4 and the master time synchronization device 1 or slave time synchronization device 2 respectively at both ends of the same optical fiber, and A cesium atomic clock 5 is connected to the master time synchronization device 1 side; the optical fiber delay value and its change value between the master and slave time sy...
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In order to solve the problems existing in the time-frequency synchronization technology of the optical fiber communication network that the slow change of the optical fiber transmission delay cannot be controlled and the extremely slow delay drift and drift accumulation cannot be solved, the present invention proposes a single-fiber ultra-high-precision time transfer The method is to connect a single-fiber bidirectional optical transceiver module, a delay processing module, and a master time synchronization device or a slave time synchronization device at both ends of the same optical fiber, and a cesium atomic clock is connected to the master time synchronization device side; the master and slave time The optical fiber delay value and its change value between synchronous devices are accurately measured and then compensated. The beneficial technical effect of the present invention is to solve the problem that the existing technology cannot eliminate the drift and drift accumulation caused by the extremely slow change of the optical fiber transmission delay with time, temperature, optical fiber aging, etc., and the time synchronization accuracy can be controlled at ±5ns Within the range, it can form a network in any form, and has a good market prospect and significant economic benefits.
Description
technical field [0001] The invention relates to a time-frequency synchronization technology of an optical fiber communication network, in particular to a single-fiber ultra-high-precision time transmission method. Background technique [0002] With the continuous development of optical fiber communication technology, extremely accurate time-frequency synchronization technology (≤1ns, ≤1E-13 / day, which is 100 times higher than the existing time-frequency accuracy) has become a frontier topic of time-frequency research all over the world. However, in the currently operating time-frequency synchronization network, it is difficult to achieve ultra-high-precision time-frequency synchronization because the time-frequency signal is greatly damaged during the transmission process of the optical fiber communication network. At present, as a transmission network, SDH network of optical synchronous digital system occupies a large proportion in my country's communication, electric power...
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IPC IPC(8): H04J3/06
Inventor 李忠文李高峰孟志才李有生李琦彭良福
Owner 四川泰富地面北斗科技股份有限公司