Dynamic high-precision time-frequency synchronization network

Abstract

The invention discloses a dynamic high-precision time-frequency synchronization network, which belongs to the field of optical fiber time-frequency signal processing and precision measurement. The time-frequency synchronization network includes a dynamic time / frequency / phase reference switch, a dynamic time / frequency / phase core switch and a dynamic time / frequency / phase edge switch. If the local switch is an edge switch and a reference switch, the input optical signal contains information sent to the local switch and other switches; the local switch outputs an optical signal containing data or time / frequency / phase information, which is transmitted through the DWDM and the direct path The optical signals are combined and output to the optical fiber path. If the local switch is a core switch, there are M channels of optical signal input, and each channel includes N wavelength channels. The local switch outputs an optical signal containing data or time-frequency information, and the optical path combing optical switch matrix forwards the uplink signal to the corresponding switch output port, and outputs it to the optical fiber path through DWDM combined with the through optical signal. The invention has high information transmission efficiency and realizes dynamic reconfiguration of the network.

Description

technical field [0001] The invention belongs to the field of optical fiber time-frequency signal processing and precision measurement, and in particular relates to a dynamic high-precision time-frequency synchronization network. Background technique [0002] Optical fiber high-precision time-frequency transmission refers to the non-destructive transmission of time and frequency references using optical fiber as the medium. The generation and transmission of time-frequency standards plays a vital role in national economy, national defense construction and daily life. In the future communication network, compatible with the transmission of time-frequency information and data signals, high-precision time-frequency synchronization of each network node is undoubtedly an inevitable development direction. At present, the point-to-point time-frequency synchronization accuracy based on optical fiber transmission can reach femtosecond or even attosecond level, but the IEEE1588v2 proto...

AI Technical Summary

Problems solved by technology

[0004] 1. The network constructed by the original technical solution is a time-frequency synchronous network, which is difficult to combine with the existing high-speed data communication network. This solution uses a small amount of time-frequency dedicated data tags for data transmission, and the transmission rate is slow

[0005] 2. The network built by the original technical solution is limited by the switch design, it is difficult to deal with complex network topology and huge number of time-frequency synchronization nodes, and as the number of time-frequency synchronization nodes increases, a large number of customized switches are required, and the cost is greatly increased

[0006] 3. The network topology built by the original technology is a one-layer structure. Time-frequency signals that are far apart need to pass through multiple switches to reach the target node, and the synchronization efficiency is low.

[0007] 4. The network built by the original technology does not design an all-optical time / frequency / phase relay. In the scheme of realizing long-distance time / frequency / phase synchronization, optical-electrical-optical conversion is required, which increases signal processing delay

[0008] 5. In the original technical solution, the switch in the high-precision optical fiber time-frequency signal synchronization network did not mention the phase information

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