KR20030053894A - Method for Making a Diagnosis of Through Path in Ring - Google Patents

Abstract

PURPOSE: A method for diagnosing a through-path of each node in a ring is provided to minimize a failure state by effectively diagnosing and quickly restoring a failure node in case that the number of nodes increases. CONSTITUTION: When a diagnosis request is received from an operator(S41), a current diagnosis node is designated as a start diagnosis node in order to diagnose an alarm state of a through-path of each node corresponding to the operator's request(S42). The next diagnosis node is searched to check whether a pertinent diagnosis tributary has been connected(S43). If there is no connection of a tributary to be diagnosed in the current diagnosis node, the operator is informed of the corresponding state(S44). If there is a connection of a tributary to be diagnosed at the current node, it is judged whether the tributary to be diagnosed is an add-drop path or a through-path(S45). If the tributary to be diagnosed is the add-drop path, the operator is informed of the corresponding state(S46). If the tributary is a through-path, a state of a pertinent through path is read through a hardware ASIC(Application-Specific Integrated Circuit)(S47) to check whether the through path is in an alarm state(S48). If the through path is not in an alarm state, the corresponding node is judged to be normal and the operator is informed according(S49). If the through path is in the alarm state, the pertinent node is judged to be not normal and the operator is informed accordingly(S50).

Description

Method for Making a Diagnosis of Through Path in Ring}

The present invention relates to a method for diagnosing a low pass of each node in a ring, and in particular, a low pass of each node in a ring for diagnosing a low pass state of each node in a UPSR to quickly find and fail over to a failed node when a failure occurs. It is about a diagnostic method.

In general, a unidirectional path switching ring (UPSR) is a type of self-healing ring that is a network protection method used in a synchronous digital hierarchy (SDH) network. The self-healing ring is divided into a bidirectional line switching ring (BLSR) and a unidirectional path switching ring (UPSR), which is a unidirectional line switching ring.

As shown in FIG. 1, an intermediate node is located between two nodes in which an Add-Drop Path for a specific Tributary to be diagnosed in a network operated by a corresponding Unidirectional Path Switching RING (UPSR) exists. exist.

Here, the tree view tree is a dependent signal constituting the STM-1 (155.520 Mbps) signal.

In this intermediate node, the path setting for the specific treeview tree to be diagnosed is the through path. No alarm monitoring will be performed for this throw pass. This is because when alarm monitoring is performed, an alarm for a failure in one ring spreads to all nodes. The proliferation of faults is inefficient because it alerts the operator of unnecessary alarms and can further confuse tracking of fault points. Thus, alarm monitoring at one node is only performed for the ad drop pass.

The structure for monitoring the alarm in the conventional UPSR network is a polling (Polling) method, the conventional method applied in the conventional structure will be described with reference to the flow chart of FIG.

First, it is determined whether the path setting is an ad drop path (step S21), and if the path setting is an ad drop path, the corresponding hardware application (ASIC) is read to read the ad drop path. The alarm condition is retrieved (step S22).

As a result of the search, it is determined whether there is an alarm (step S23), and in the case of an alarm state, the operator is notified of the alarm state (step S24), and when it is not an alarm state, the operation returns to step S21 to repeat the above operation.

As described above, when a failure occurs in the UPSR network, there is a difficulty in tracking a failed node due to the alarm monitoring by limiting to the ad drop path instead of performing alarm monitoring for all the draw passes.

In addition, in order to prevent the failure by performing actions only on the Tributary where the corresponding alarm is generated, in order to avoid affecting other in-service lines during the In Service, failure recovery for the path in the failure state is prevented. There was a problem with the process quickly.

The present invention is to solve the above-mentioned general problems, the purpose is to monitor the low pass according to the operator's command when the alert occurs in the node where the ad drop in the UPSR network to quickly find the faulty node to solve the fault have.

1 is a view showing a conventional UPSR network structure.

2 is a flowchart illustrating a method for diagnosing failure of each node in a conventional UPSR network.

Figure 3 is a diagram showing the low pass diagnostic point and structure of each node in the UPSR according to the present invention.

4 is a flowchart illustrating a method for diagnosing a low pass of each node in UPRS according to the present invention.

In the ring of the present invention, a method for diagnosing a low pass of each node in a ring of the present invention includes: receiving a diagnostic request from an operator; Designating a current node as a start node; Determining whether the tree view tree to be diagnosed is a through pass or an ad drop path when there is a connection of a tree view tree to be diagnosed at the current diagnosis node; As a result of the determination, when the tree view to be diagnosed is a through pass, reading a through pass state through a hardware game; As a result of reading the low pass state through the hardware game, when the low pass state is an alarm state, a step of notifying an operator that the node is in an abnormal state is made.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 3, the structure for diagnosing the draw path of each node in the ring according to the embodiment of the present invention includes a path type for the tree view tree, which has an add drop path and a draw path. Are present at node 1 and node 4, and the through paths are present at node 2, node 3, node 5 and node 6.

Looking at the watch points for the throw pass to the treeview tree t at node 6, there are two watch points, the former being the point for monitoring the state of the signal received from node 5, the latter being received from node 1 The point at which the state of the signal is monitored.

Which of the monitoring points is diagnosed depends on the diagnosis direction input from the operator when performing the diagnosis.

The method of diagnosing a narrow pass of each node in a ring according to an embodiment of the present invention will be described with reference to the flowchart of FIG. 4.

First, when receiving a diagnostic request from the operator (step S41), in order to diagnose an alarm condition for the low pass of each node corresponding to the operator's request, the current diagnostic node is designated as the start diagnostic node (step S42), The next diagnostic node is searched to check whether the corresponding diagnostic tree view tree is connected (step S43). If there is no connection of the tree view tree to be diagnosed at the current diagnosis node, the state is notified to the operator, and then terminated (step S44).

However, if there is a connection of the tree view tree to be diagnosed at the current diagnosis node, it is determined whether the tree view tree to be diagnosed is an ad drop path or a low path (step S45).

If the ad drop pass, the operator is notified of the state, and then terminates (step S46).

However, if the tree view to be diagnosed is a draw pass, after reading the state of the draw path through the hardware game (step S47), it is checked whether the draw path state is an alarm state or not (step S48).

If the state of the draw path is not an alarm state, the node determines that the node is normal, notifies the operator, and terminates (step S49).

However, if the state of the draw path is an alarm state, the node determines that it is not normal, notifies the operator, and then returns to step S43 to perform the above operation (step S50).

Although the preferred embodiments of the present invention have been described in detail above, it will be understood by those skilled in the art that the present invention may be modified or modified in various ways. Therefore, changes of the embodiments of the present invention will not be able to escape the technical scope of the present invention.

As described above, when the number of nodes increases in the ring, the present invention can effectively diagnose and rapidly recover a failed node, thereby minimizing a failure state.

In general, the main cause of the failure state is a failure in the draw pass and the ad drop pass, the failure in the draw pass can determine the faulty node by performing a diagnosis of the entire ring.

Therefore, the operator does not need to find the point of failure by querying each alarm of many nodes, and can improve the quality of service by minimizing the failure state.

Claims (3)

Receiving a diagnostic request from an operator; Designating a current node as a start node; Determining whether the tree view tree to be diagnosed is a through pass or an ad drop path when there is a connection of a tree view tree to be diagnosed at the current diagnosis node; As a result of the determination, when the tree view to be diagnosed is a through pass, reading a through pass state through a hardware game; As a result of reading the low pass state through the hardware game, when the low pass state is an alarm state, the node of each node in the ring comprises a step of notifying the operator that the node is in an abnormal state. Pass diagnostic method. The method of claim 1, And determining the path state of the tree view tree to be diagnosed, in the case of an ad drop path, notifying the operator of the state and terminating the path. The method of claim 1, The method for diagnosing a low pass of each node in a ring according to which direction the current node diagnoses in either direction is determined according to a diagnosis direction received from an operator when performing a diagnosis.