A submarine optical transmission system and disaster recovery method thereof

Abstract

The present application provides a submarine optical transmission system and a disaster recovery method thereof. The system includes a first shore station and a second shore station connected by a first main road and a second main road; at least one optical splitting unit arranged on the main road, each optical splitting unit corresponds to an underwater main node, and the optical splitting unit and the corresponding The underwater main node of the underwater branch is connected through a first downlink branch optical fiber, a second downlink branch optical fiber, a first uplink branch optical fiber, and a second uplink branch optical fiber. In the uplink service, the uplink optical signal of the underwater master node can be bidirectionally transmitted to the first shore station and the second shore station, and in the downlink service, the first shore station and the second shore station can send downlink optical signals from two directions . In this way, even if the uplink optical signal fails to transmit in one direction, the first shore station or the second shore station can also receive the uplink optical signal from the other direction, and even if the downlink optical signal fails to transmit in one direction, the underwater master node will also The downlink optical signal can be received from another direction to realize the disaster recovery capability of the business.

Description

technical field [0001] The present application relates to the technical field of optical communication, in particular to a submarine optical transmission system and a disaster recovery method thereof. Background technique [0002] The seabed observation network is a new platform for human to observe the ocean. It can realize all-weather, in-situ, long-term, continuous, real-time, high-resolution and high-precision observation of the ocean from the seabed to the sea surface, and plays an important supporting role in the development of marine science. Through the submarine observation network, researchers can monitor deep-sea experiments in real time on the shore, and remotely monitor various emergencies such as submarine storm surges, volcanic eruptions, earthquakes, tsunamis, landslides, and red tides, so as to better serve national defense construction, scientific research, and the public. economic development. In addition, the ocean is also rich in resources such as oil a...

AI Technical Summary

Problems solved by technology

[0006] (1) An optical fiber pair is exclusively used between each underwater master node and the shore station. Therefore, one fiber pair can only realize the communication between one underwater master node and the shore station, resulting in the comparison of the utilization rate of optical bandwidth. Low, not suitable for communication / observation hybrid networks or oil / gas / observation hybrid networks that have certain requirements for communication bandwidth;

[0007] (2) When the submarine optical fiber is used for long-distance communication, it is necessary to use the submarine repeater to amplify and strengthen the optical signal. However, the number of optical fiber pairs that the submarine repeater can access is limited, so figure 1 The number of underwater master nodes that can be expanded by the shown submarine observation network is limited by the number of optical fiber pairs that can be accessed by submarine repeaters, resulting in poor expansion capabilities

[0008] (3) Although two-way communication has been realized between the underwater master node and shore stations A and B, the submarine observation network does not have disaster recovery capabilities. For example, when one of the fibers in the fiber pair is disconnected, one of the Communication in the direction will be interrupted

[0012] (1) There is no dummy light (DL) signal in the optical fiber. Therefore, in the design of the optical communication network, the business cannot be flexibly adjusted, and the nonlinear cost is high

[0013] (2) There is no bidirectional 1+1 protection mechanism for business signals

[0014] (3) The business signal is transmitted in one direction, that is, only from the underwater main node to shore station A or from the underwater main node to shore station B

[0015] (4) Since the current submarine repeater RPT equipment generally works in the optical power locking mode, in the absence of DL signals, after the upstream optical signal in the underwater master node is added to the trunk optical fiber, the business of other nodes The quality has a great impact, and in severe cases, the business cannot be transmitted

[0016] It can be seen that the current seabed observation network solution cannot have disaster recovery capability and good scalability in the case of high bandwidth, two-way communication capability and 1+1 business protection capability at the same time, and the reliability is poor

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