A method, device and system for optical fiber link identification

Abstract

Embodiments of the present invention relate to the communications field, and provide a fiber link recognition method, device, and system, to recognize different fiber links. The method includes: sending, by a link recognition device, a first test optical signal; receiving a second test optical signal that is returned after the first test optical signal is sent to a connection port of a first optical node; acquiring a reflection peak of the second test optical signal on a fiber link; determining a port identifier of the connection port of the first optical node according to the reflection peak of the second test optical signal on the fiber link; and recognizing, according to the port identifier of the connection port of the first optical node, the fiber link corresponding to the second test optical signal that is returned by the connection port of the first optical node. The method embodiment is used to recognize a fiber link.

Description

technical field [0001] The present invention relates to the field of communications, in particular to a method, device and system for identifying optical fiber links. Background technique [0002] With the rapid expansion of optical fiber network scale, passive optical network technology has gradually become a hot spot in optical access network technology. Passive optical network includes OLT (Optical Line Terminal, Optical Line Terminal), ODN (Optical Distribution Network, Optical Distribution Network) and ONU (Optical Network Unit, Optical Network Unit), where the ODN consists of multiple optical fiber links, specifically Including one or more optical splitters and optical fibers, the optical splitter is used to split or combine optical signals, for example, the optical splitter can divide the optical signal sent by the OLT into multiple signals and transmit them to different ONUs through optical fiber links . [0003] In order to ensure the normal transmission of optica...

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Problems solved by technology

[0004] However, usually the passive optical network divides the main optical fiber link into multiple optical fiber links by configuring an optical splitter, so that one optical signal is divided into multiple branch optical signals through multiple optical fiber links, and transmitted to the corresponding user end. In this way, during the maintenance of the optical fiber link, the test signals corresponding to the multiple branch optical signals after branching are reflected on the corresponding optical fiber link, and after passing through the optical splitter, the multiple optical fiber links are superimposed, This makes it impossible for the optical time domain reflectometer to distinguish and identify the optical fiber link corresponding to the test optical signal of each branch, and it is also impossible to determine the optical fiber quality of the corresponding optical fiber link according to the reflection peak formed by the test optical signal. If the optical fiber link fails, then Unable to determine failed fiber link

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