KR20060062015A - Fault detection method of multi-node on network - Google Patents

Abstract

The present invention relates to a multi-node failure diagnosis method on a network that performs failure, state management, and diagnostic functions of various systems such as a UMTS switch, an RNC, an ATM switch, a base station, and a relay on a network. The multi-node failure diagnosis method includes preparing an OAM cell and inserting the same in the same communication channel as the user information in diagnosing a plurality of multinodes on a network in which a communication channel for user information is formed; Transmitting the OAM cells toward the plurality of multi-nodes, receiving the OAM cells at the multi-nodes sequentially, and returning OAM cells for failure diagnosis results from each of them; Include. As a result, faults occurring in the network passing through the communication paths of the multi-level communication paths such as repeaters, exchanges, and base stations, that is, multi-nodes of each of these communication paths can be quickly and accurately diagnosed. This can improve the reliability of the network.

Network, node, repeater, exchange, base station, failure, diagnostics

Description

Fault detection method of multi-node on network

1 is a block diagram for node failure diagnosis on a network according to the prior art,

2 is an explanatory diagram for implementing a multi-node failure diagnosis method on a network according to the present invention,

3 is a view showing a general OAM Cell Field,

4 is a view showing a standard form of the special field for the loopback according to the present invention,

FIG. 5 is a diagram illustrating a special field for multiloopback in which a hop count is set in FIG. 4.

The present invention relates to a multi-node failure diagnosis method on a network, and more particularly, to a multi-node failure on a network that performs failure, state management, and diagnostic functions of various systems such as a UMTS switch, an RNC, an ATM switch, a base station, and a repeater. It is about a diagnostic method.

In general, a node on a network refers to a plurality of transit zones such as various exchanges, base stations, and repeaters that connect a call between a terminal and the terminal in a broad sense, and a plurality of communication cards in each transit area in a narrow sense. Here, the communication card is a built-in diagnostic algorithm for the failure response.

Such nodes may cause communication failures due to failures due to disturbance, shock, and lifespan. In order to prevent communication failures, failure diagnosis should be performed intermittently.

The prior art for diagnosing the failure of such a node, as shown in Figure 1, has a failure diagnosis processing unit (1) for performing a failure diagnosis with a failure diagnosis algorithm, and the failure diagnosis algorithm of the failure diagnosis processing unit (1) It consists of a plurality of nodes to be diagnosed (2) receiving a signal by the response. Here, the fault diagnosis processing unit 1 and the node 2 perform communication as a mechanism for network communication, and the fault diagnosis mode is temporarily operated.

However, such a conventional technology manages the failure and the state of the system by the one-to-one communication between the processing unit and the diagnosis target node, so that the appropriate diagnosis can be performed when the number of nodes to be diagnosed is small, but the node increases when the target node increases. There is a problem in that a considerable time and procedure are required to detect a network or to grasp a network condition.

In addition, due to the increase of nodes, not only it is difficult to cope with real-time faults generated during the operation of the network, but also it is difficult to track the location of the node, which causes a long time in maintenance of the switch and the like, resulting in a drop in QoS.

The present invention has been made to solve the above problems, it is possible to quickly and accurately diagnose the faults occurring in the multi-node of each network, that is, the network via the communication paths of various stages such as repeaters, exchanges, base stations, etc. The purpose of the present invention is to provide a multi-node failure diagnosis method on a network that can cope with failure nodes in real time even if the number of diagnostic nodes increases.

According to the present invention, in the multi-node failure diagnosis method on a network in which a communication channel for user information is formed, preparing an OAM cell and inserting the same in the same communication channel as the user information. Transmitting the OAM cell toward the plurality of multi-nodes; receiving the OAM cell at the multi-node sequentially and returning an OAM cell for the fault diagnosis result from each of them; It is achieved by a multi-node failure diagnosis method on the network comprising the step of.

In addition, extracting a specific field for the loopback (LoopBack) from the OAM cell (Cell) returned in the step and analyzing it, and determining the failure and non-disability of the node according to the analysis result It is preferable to further include.

In the preparing of the OAM cell, the method may further include inserting a multi-loopback specific field into the OAM cell.

The multi-loopback special field has a hop count field for setting the number of target nodes in the forward direction of the networking, and the hop count field may include a plurality of fields of any field not used. It is preferable that it consists of specific Octet.

On the other hand, the multi-node is at least any one of a repeater, a base station, a switch is provided in sequence, it is preferable that at least any one of a plurality of cards included in the order in which they can communicate.

According to another aspect of the present invention, in the multi-node failure diagnosis method, preparing an OAM cell in which a multi-loopback special field is inserted, and toward the plurality of multi-nodes. Transmitting the OAM cell, and sequentially receiving the OAM cell at the multi-node according to the special field for multi-loopback and returning an OAM cell for fault diagnosis result from each of them. It is achieved by multinode fault diagnosis method.

In addition, extracting a specific field for the loopback (LoopBack) from the OAM cell (Cell) returned in the step and analyzing it, and determining the failure and non-disability of the node according to the analysis result It is preferable to further include.                     

Here, the special field for multi-loopback has a hop count field for setting the number of target nodes in the direction of networking forward direction, and the hop count field includes a plurality of fields of any field not used. It is preferable that it consists of specific Octet.

At least one of a repeater, a base station, and a switch may be sequentially provided, and at least one of a plurality of cards included in the multi-node may be provided in an order in which communication is possible.

Hereinafter, a multinode failure diagnosis method on a network according to the present invention will be described in detail with reference to the accompanying drawings. 2 is an explanatory diagram for implementing a multi-node failure diagnosis method on a network according to the present invention, Figure 3 is a view showing a general OAM Cell Field, Figure 4 is a standard form of a special field for loop back according to the present invention 5 is a diagram illustrating a multi-loopback special field in which a hop count is set in FIG. 4.

The configuration for implementing the multi-node failure diagnosis method, as shown in Figure 2, the OAM cell (Cell) to communicate with the master node (node) that is the starting point for performing the failure diagnosis, and sequentially therefrom It consists of a number of nodes that are connected.

In this case, the master node transmits an OAM cell toward another node for failure diagnosis, and the same can be performed in other nodes capable of transmitting the failure diagnosis OAM cell.                     

In general, the OAM cell detects whether a transmission line or an exchange is operating normally or monitors performance such as cell loss or operation error, as shown in FIG. 3.

That is, the OAM cell is composed of 53 bytes (byte = octet), 5 bytes of which are a header part, and the rest are OAM cell information field parts. In the OAM cell information field, one byte is an OAM type part and a function type part, 45 bytes are a functional specific field, and 6 bits of two bytes are not used for other users. 10 bits is the EDC part.

In particular, as shown in FIG. 4, the detail field includes a 1-byte LoopBack Indication (hereinafter, LI) field and a 4-byte Correlation tag field. And a 16-byte LoopBack Location ID field (hereinafter referred to as LLID), a 16-byte source ID field, and 9-byte Unused field.

In the present invention, the detailed field is to use the unused field as shown in 5, and allocates only 4 bytes to perform sequential and continuous transmission and response by a certain number of nodes in the forward direction. It is configured by inserting one hop count field.

In the multi-node failure diagnosis method according to the present invention as described above, as shown in FIG. 2, in the environment in which a plurality of nodes are sequentially arranged with a master node, the node for failure diagnosis of the plurality of nodes is first shown in FIG. 2. OAM cell is inserted into a communication channel for transmitting user information and occurs in the master node.

As shown in FIG. 5, the OAM cell includes a head field and a special field for multi-loopback, and allocates 4 bytes of unused fields to the multi-loopback special field. A hop count (hereinafter referred to as HC) field is inserted into the field.

Then, the master node transmitting the OAM cell inserts a multi-loopback special field having LLID = "0", LI = "1", HC = "n" (count number of the node to be diagnosed) into the OAM cell. The node receives the OAM cell transmitted by the master node and sends its location ID (1), which is its location ID, to the LLID. Responds to the backward direction, that is, toward the master node side by inputting "1" to the LI, and the OAM cell having the multi-loopback specific field reduced to HC = "n-1" on the next node side. Retransmit in the forward direction.

As described above, each of the multi-nodes receiving the OAM cell sets its position value in the LLID and responds with a backward. The multi-node retransmits the count number HC of the node to be diagnosed by "1" and forwards it in the forward direction.

The mast node detects and analyzes the multi-loopback special field from the OAM cell that has responded backward and determines whether the node is a normal node or a node that fails to perform a diagnosis function normally.

As described above, the node of the present invention not only forms a multi-node in which at least one of a repeater, a switch, and a base station line equipment is sequentially connected to a communication channel, but also any one of a plurality of cards configured in the communication. It contains the connections in the possible order. The same applies to systems with communication channels related to networking.

The present invention can quickly and accurately diagnose a fault occurring in a network that passes through multiple levels of communication paths, such as a repeater, an exchange, a base station, and the like. This can improve the reliability of the network.

In addition, the use of the hop count prevents the performance degradation of the system due to infinite operation during the diagnosis of the multi-node, and obtains the maximum effect with the minimum load.

Claims (11)

A method for diagnosing a plurality of multi-node failures on a network in which a communication channel for user information is formed; Preparing an OAM cell and inserting the same into the same communication channel as the user information; Transmitting the OAM cell toward the plurality of multinodes; Receiving the OAM cell (Cell) sequentially in the multi-node and returning an OAM cell (Cell) for a failure diagnosis result from each of them multi-node failure diagnosis method on a network. The method of claim 1; Extracting a specific field for a loopback from the OAM cell returned in the step and analyzing the specific field; And determining failure and non-failure of the corresponding node according to the analysis result. The method of claim 1; The preparing of the OAM cell further comprises inserting a multi-loopback specific field into the OAM cell. The method of claim 3; The multi-loopback special field has a hop count field for setting the number of target nodes in a forward direction of networking. The method of claim 4; And the hop count field comprises a specific octet of a plurality of areas among unused fields. The method of claim 1; The multi-node failure diagnosis method of the multi-node network, characterized in that at least one of a repeater, a base station, a switch is provided in sequence, at least one of the plurality of cards included in the communication order. . In the multi-node failure diagnosis method; Preparing an OAM cell into which a multi-loopback special field is inserted; Transmitting the OAM cell toward the plurality of multinodes; And receiving the OAM cells sequentially in the multi-node according to the multi-loopback special field and returning the OAM cells for failure diagnosis results from each of them. The method of claim 7; Wherein the multi-node is a repeater, a base station, a switch is at least one is provided in sequence, and at least any one of a plurality of cards included in the multi-node failure diagnosis method on a network, characterized in that provided in the communication order. The method of claim 7; The multi-loopback special field has a hop count field for setting the number of target nodes in a networking forward direction. The method of claim 9; And the hop count field comprises a specific octet of a plurality of areas among unused fields. The method of claim 7; Extracting a specific field for a loopback from the OAM cell returned in the step and analyzing the specific field; And determining failure and non-failure of the corresponding node according to the analysis result.

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