1+1 protection method and failure detection device

Abstract

The invention discloses a 1+1 protection method and a failure detection device. The method comprises the following steps: when a failure detection point outside the protected domain detects a fault warning, based on that the current service is borne by a working path or a protection path, the failure detection point determines that the fault warning is a working fault warning or a protection fault warning; the fault warning is determined to be about fault appearance or fault disappearance according to the fault state; when a fault appears, the working / protection fault treatment is performed; and when a fault disappears, the working / protection warning disappearance and the protection / working warning disappearance of the failure detection point outside the protected domain are set in sequence. By using the method of the invention, the failure detection point outside the protected domain is fully utilized and the system is protected better.

Description

technical field [0001] The invention relates to a protection technology in an optical transmission network (OTN), in particular to a 1+1 protection method and a fault detection device. Background technique [0002] A typical 1+1 automatic protection switching (APS) system includes three parts: a fault detection unit (placed at the fault detection point), an execution unit and a control unit. Wherein, the fault detection unit is used for detecting faults and notifying the control unit of the detected faults, and the control unit analyzes the faults and then controls the execution unit to perform protection actions. [0003] Theoretically, all performance detection points related to signals and services in the system can be used as fault detection points. Generally speaking, fault detection points are divided into working and protection points, that is, fault detection points located on the working path and fault detection points located on the protection path. Correctly con...

AI Technical Summary

Problems solved by technology

[0005] for figure 1 The fault detection point 3 in the fault detection point has a more powerful fault detection capability and can detect faults that cannot be detected by fault detection point 1 and fault detection point 2. However, fault detection point 3 is located in the protection domain In addition, it cannot be intuitively judged whether the detected fault occurred on the working path or the protection path

This is not conducive to fault location

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