Device and method for detecting and recording abnormity on basis of watchdog in PON (Passive Optical Network) access system

Abstract

The invention discloses a device and a method for detecting and recording abnormity on the basis of a watchdog in a PON (Passive Optical Network) access system. The device comprises a hardware watchdog, a software watchdog, a log recording module and a CLI (Command-Line Interface), wherein the software watchdog comprises a configuration management module, a task state detection module and a CPU (Central Processing Unit) utilization ratio detection module; the task state detection module is connected with the log recording module and used for polling the task sate of the system; the CPU utilization ratio detection module is connected with the hardware watchdog and used for detecting the CPU utilization ratio of the system; the task state detection module is communicated with the CPU utilization ratio detection module through a pipeline communication mode; the software watchdog is used for outputting a reset signal to a hardware watchdog timer at regular time; and when abnormity is detected, a zone bit is set, zero clearing is stopped by the log recording module after the abnormal information is recorded by the log recording module, a master control panel is reset, and changeover is triggered. According to the invention, a master panel is automatically reset to recover a system service when the master control panel is abnormal, and the abnormal data is recorded before resetting, which is beneficial to positioning faults.

Description

technical field [0001] The present invention relates to the field of PON (Passive Optical Network, passive optical network) access systems, in particular to a watchdog-based anomaly detection and recording device and method in the PON access system. Background technique [0002] Watchdogs are divided into hardware watchdogs and software watchdogs. The hardware watchdog is a timer circuit, its timing output terminal is connected to the reset terminal of the circuit, and the program clears the timer within a certain time range (commonly known as "feeding the dog"). When the program is working normally, the timer cannot overflow, and the reset signal cannot be generated. If the program breaks down and does not reset the watchdog within the timing period, the watchdog timer overflows, generating a reset signal and restarting the system. The principle of the software watchdog is the same, but the hardware timer circuit is replaced by the internal timer of the processor, which c...

AI Technical Summary

Problems solved by technology

With the wide application of EPON (Ethernet Passive Optical Network, Ethernet Passive Optical Network) equipment, the application environment of the equipment is becoming more and more complex. Once the equipment is abnormal due to some reasons, there is no need for human intervention when the main control panel is abnormal. In some cases, such as network management disconnection, abnormal protocol processing, etc., the watchdog automatically resets the main disk. Reset is only a method to restore the system, which often destroys the data at the fault site, which is not conducive to program developers to view the phenomenon and locate the fault. The consequence of this is that the problems that have occurred cannot be completely solved, causing the problems that have occurred to recur, affecting the use of the system

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