Light path automatic switching system

Abstract

This invention relates to an optical path automatic switching system including a chassis, a power supply, a network disk and at least a service disk, in which, said supply provides power supply to the network disk and the service disk, and they are plugged in the chassis, the service and the network disks are connected by a serial bus, said service disk is composed of a light T-R module, a photoelectric switch chip, a digital signal processor, a programmable digital logic device, a single-chip processor, a first optical switch and a second optical switch, which can be used in automatic switch between a master fiber optical path and a backup fiber optical path and master and backup devices in point to point, loop network and mesh fiber communication and provides non-blocking communication to users and networks.

Description

technical field [0001] The invention relates to the field of optical fiber communication, in particular to an optical path automatic switching system for switching between master and backup optical paths in point-to-point optical fiber communication. Background technique [0002] With the development of communication technology, a large number of optical fibers have been laid and operated as the medium of signal transmission in the trunk network and metropolitan area network. In China's huge communication optical cable network of millions of kilometers, more than 2,000 optical cable interruptions occur every year, causing a huge direct communication loss of more than 1 billion yuan and immeasurable damage to all walks of life in the national economy, party, government, and military departments. Indirect major loss. When the fiber breaks or the line loss increases, data will be lost or even communication will be completely interrupted. The introduction of the concept of opt...

AI Technical Summary

Problems solved by technology

In addition, there is an information security problem in placing the equipment add / drop multiplexer (ADM) in the Synchronous Digital Hierarchy (SDH) directly at the user's location

Synchronous Digital Hierarchy (SDH) self-healing protection switching is protection switching for the service layer, so its protection switching mechanism is relatively complicated

For many point-to-point or chain-type SDH transmission systems, the protection of optical fiber lines is usually achieved by adding line interface boards to form a self-healing ring and configuring the multiplex section protection function (or channel protection function). This solution also has the following problems: the protection switching time is long, and the general protection switching time is about 50ms; the implementation and subsequent maintenance costs are high and difficult; only SDH transmission equipment with the same manufacturer and the same interface rate can be used for optical fiber line protection. Restricted by the same manufacturer; equipment costs are high, and lines require dual or four fibers

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