Optical fiber network system

Abstract

The invention provides an optical fiber network system, comprising a first base station, a first optical near-end machine, a second base station, a second optical near-end machine, a first optical far-end machine, a second optical far-end machine, a third optical far-end machine and a fourth optical far-end machine, wherein the first optical far-end machine exchanges optical information with the first optical near-end machine through two optical fibers and exchanges the optical information with the second optical near-end machine through one optical fiber; the second optical far-end machine exchanges the optical information with the first optical near-end machine through two optical fibers and exchanges the optical information with the second optical near-end machine through one optical fiber; the third optical far-end machine exchanges the optical information with the second optical near-end machine through two optical fibers and exchanges the optical information with the first optical near-end machine through one optical fiber; the fourth optical far-end machine exchanges the optical information with the second optical near-end machine through two optical fibers and exchanges the optical information with the first optical near-end machine through one optical fiber; any one optical far-end machine is connected with the adjacent optical far-end machine, wherein a pre-set difference is set between strengths of input and output signals of the first optical near-end machine and the second optical near-end machine.

Description

technical field [0001] The invention relates to an optical fiber repeater, in particular to an optical fiber network system. Background technique [0002] The traditional optical fiber repeater engineering networking method is simple, but this kind of optical fiber repeater adopts a star network mode. If a remote machine is damaged, a blind area will appear in a certain area. If the near-end machine is damaged, all areas will be closed. It will become a signal blind area with a low degree of reliability. It is only applicable to the signal coverage of ordinary civil mobile communication systems with low reliability requirements, but it is not applicable in the case of high reliability requirements in rail communication systems. ; At present, there is still a way of interweaving the network with base station A and base station B respectively using optical fiber repeaters, which has a relatively high degree of reliability, but this way uses more equipment and is inconvenient t...

AI Technical Summary

Problems solved by technology

[0002] The traditional optical fiber repeater engineering networking method is simple, but this kind of optical fiber repeater adopts a star network mode. If a remote machine is damaged, a blind area will appear in a certain area. If the near-end machine is damaged, all areas will be closed. It will become a signal blind area with a low degree of reliability. It is only applicable to the signal coverage of ordinary civil mobile communication systems with low reliability requirements, but it is not applicable in the case of high reliability requirements in rail communication systems. ; At present, there is still a way of interweaving the network with base station A and base station B respectively using optical fiber repeaters, which has a relatively high degree of reliability, but this way uses more equipment and is inconvenient to maintain, and the coverage distance can only be within 6 Within one kilometer, when the far-end machine fails, the signal will be switched twice, and in the case of the near-end machine or the main base station failure, the level coverage level of the entire line area will all drop

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