KR20030010039A - Method for reciprocal guard each step of message path between nodes - Google Patents

Abstract

PURPOSE: A method for reciprocally monitoring message paths between nodes by steps is provided to test a transceiving path testing message or a loopback message by monitoring the message paths stepwise in each node, depending on whether a failure is generated, thereby automatically recognizing hardware or a node of a certain path having a failure. CONSTITUTION: Each node decides whether node states are normal(S601). If so, the nodes transmit a message for testing a message transceiving path(S602), and increase the number of test message transmissions by one time(S603). The nodes compare the number of the test message transmissions with a reference value, and confirm that the message is normal between the nodes when the message is received within the reference value. If the message is not received during the reference value, the nodes inform of a message transceiving path failure(S605). The nodes update a message path step between presently-tested nodes to a message transceiving processor of a board(S606), and update node states as failure states(S607).

Description

{Method for reciprocal guard each step of message path between nodes}

The present invention relates to a method for mutual monitoring of message paths between nodes in an exchange, and particularly, when a message is exchanged through a plurality of nodes in an exchange, it is possible to monitor hardware identification and fault identification that may occur on a specific node path. It is a method for mutual monitoring of message paths between nodes.

1 is a block diagram illustrating an apparatus for monitoring message paths between exchange nodes in the related art.

Referring to Figure 1, in order to monitor the status of each node to send and receive a specific message to each node, and whether the message transmission and reception status of normal and the processor 101, and receives a specific message received from the upper processor and the corresponding node It consists of a plurality of lower processors (102a ~ 102n, 102n + 1) transmitted to the upper processor through.

Referring to the accompanying drawings, a conventional device for monitoring message paths between exchange nodes is as follows.

Referring to FIG. 1, a plurality of nodes are configured in an exchange, and an upper process 101 among the nodes is configured to detect a state of each node 102a to 102n + 1 as a higher layer on a functional layer. do.

To this end, the upper processor 101 transmits a previously-defined message transmission / reception path test message to the lower processors 102a to 102n and 102n + 1. Each of the lower processors 102a to 102n and 102n + 1 receives the inter-node transmit / receive path test message transmitted from the upper processor 101 and transmits the message to the upper processor 101.

Then, when the upper processor 101 receives the node-to-node transmission / reception path test confirmation message sent back to the lower 102a to 102n and 102n + 1, the upper processor 101 is connected between the upper processor 101 and the lower processor 102a to 102n and 102n + 1. It is determined that a transmission / reception path between nodes is normal.

However, when the upper processor 101 does not receive the inter-node message transmission path test test message transmitted to the lower processors 102a to 102n and 102n + 1 from a specific lower processor, the higher processor receives the inter-node message between the lower processors. It is determined that the transmission and reception path is abnormal.

As described above, in the related art, the upper processor 101 that monitors each node becomes a subject and transmits the message for the transmission / reception path test between the nodes to the lower processors 102a to 102n and 102n + 1 first, and then receives the transmitted message again. Done.

However, although the message transmission / reception path is tested only between end-to-end processors, the message transmission / reception path between nodes is composed of several steps. However, the test is performed only between end-to-end processors. It is not possible to confirm at which stage the failure time point occurred, and only recognizes the abnormal processor. Therefore, there is a problem in that it is not possible to identify a step in a failed message transmission / reception path and a failed hardware device, so that the failure cannot be quickly recovered.

In addition, since the upper processor serves as a subject to send and receive path test transmission / reception messages, if a failure occurs in the message transmission / reception path between nodes, only the upper processor can recognize a failure state on the message transmission / reception path, which is inefficient in terms of operation of the exchange.

The present invention has been made to solve the above-mentioned conventional problems, there is no concept of the upper and lower processors for monitoring the state of each board, and transmit and receive the message transmission path test message to the other node independently in each board and Its purpose is to provide a mutual monitoring method for each node's message path so that it can receive and monitor each other.

Another purpose is to recognize the failure of the transmission / reception path between the nodes as a failure state, test the loopback test message step by step from the transmission path to the matching line between nodes, and receive the loopback message. The purpose of this is to provide a method for mutual monitoring of message paths between nodes so that a hardware failure of a corresponding path can be recognized.

1 is a block diagram showing a message path monitoring system between a conventional exchange node.

2 is a block diagram showing a message transmission and reception system between nodes according to an embodiment of the present invention.

3 is a block diagram showing a message transmission and reception system between nodes according to an embodiment of the present invention.

4 is a flowchart illustrating an initialization process in a method for mutual monitoring of message paths between nodes according to an exemplary embodiment of the present invention.

5 is a flowchart illustrating a mutual monitoring method for each message path between nodes according to an exemplary embodiment of the present invention.

6 is a flowchart illustrating a method for mutual monitoring of paths when a message failure occurs between nodes according to an exemplary embodiment of the present invention.

7 is a flowchart illustrating recovery of a message path failure state between nodes according to an embodiment of the present invention.

8 is a flowchart illustrating a loopback recovery state according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

101 ... Higher processor 102a to 102n + 1 ... lower processor

200,300,400 ... processor board 201,301,401 ... processor

Message sending / receiving processing unit

203,303,403 ... rear substrate

210,310,410 ... Message Tx Cable Match

211 ... Message Send / Receive Cable

In order to achieve the above object, the mutual monitoring method for each message path between nodes according to the present invention,

Transmitting a transmission / reception path test message to another node independently at a specific node;

Updating a transmission / reception path with the other node to a failure state if the transmitted test message is not received from another node;

Transmitting a loopback test message to any transmission / reception path existing between the specific board and another board if the transmission / reception path with the other node is in a failure state;

And if the transmitted loopback test message fails to receive a message transmitted from the corresponding path, updating the transmission / reception path with the corresponding path to a failure state and recognizing it as a failure state of the hardware.

In detail, the loopback message on the specific board may be tested step by step from a transceiver close to the specific board in a transmission / reception path existing between the specific board and another board.

Specifically, when the number of transmission and reception of the inter-node transmission and reception path test message is received within the reference value in the specific board, checking the updated node status and reporting a failure state recovery of the inter-node message transmission / reception path in the case of a failure state; And updating the inter-node state to a normal state when the inter-node failure state is restored.

The method may further include: reporting that a loopback test message transmitted on an arbitrary path in the specific board is within a threshold, recovering a hardware failure state of the corresponding path; When the failure state of the arbitrary path is restored, subjecting the loopback test message transmitted to the corresponding path to a matching line between other nodes: when a loopback message is received from the matching line between the nodes, receiving and transmitting a path test message as a target message between nodes. Initializing a transmission / reception path; And updating the loopback state to a normal state when the failure state is updated to a recovery state.

Hereinafter, with reference to the accompanying drawings as follows.

2 is a block diagram showing a message transmission and reception system between nodes according to an embodiment of the present invention, Figure 3 is a block diagram showing a message transmission and reception system between nodes according to an embodiment of the present invention, Figure 4 is a node according to an embodiment of the present invention In the mutual monitoring method for each message path step, a flowchart illustrating an initialization process, FIG. 5 is a flowchart illustrating a mutual monitoring method for each message path step between nodes according to an embodiment of the present invention, and FIG. 7 is a flowchart illustrating a method for mutual monitoring of paths when a message failure occurs, FIG. 7 is a flowchart illustrating a message path failure state recovery between nodes according to an embodiment of the present invention, and FIG. 8 is a flowchart illustrating a loopback recovery state according to an embodiment of the present invention. .

2 and 3, processor boards 200, 300, and 400 including a processor (CPU, 201, 301, 401) for constructing and transmitting a message to be transmitted and analyzing and processing a received message, and a message transceiver (202, 302, 402) for transmitting and receiving messages therein. )Wow; A back substrate (Back PCB, 203, 303, 403) attached to the exchanger system to receive the message transmitted from the corresponding processor (200, 300, 400) and receive a message from the outside and transmit the message to the processor; The message transmission / reception cable matching unit 210, 310, 410 is configured to transmit and receive messages transmitted and received between the processor boards 200, 300, and 400 through a message transmission / reception cable 211 connected between nodes.

Referring to the accompanying drawings, a method for mutual monitoring of message paths between nodes according to an exemplary embodiment of the present invention configured as described above is as follows.

Referring to FIG. 2, the processor board 200 includes a processor (CPU) 201 and a message transmission / reception processor 202, respectively, and the processor 201 configures a message to be transmitted and transmits and receives a configured message to the transmission / reception processor 202. Output to, receive messages and analyze and process the messages.

The transmission / reception processing unit 202 transmits the message received from the processor 201 to the cable matching unit 210 attached to the rear substrate 203 of the exchanger system to connect the nodes, and from the cable matching unit 210. A message is received and the received message is transmitted to the processor 201.

In addition, the components for transmitting and receiving messages between nodes are composed of a message transmission and reception cable matching unit 210 and a cable 211, the message transmission and reception cable matching unit 210 is a message received from the message transmission and reception processing unit 202 in the board Transmits a message to another node through a connected cable 211, and transmits a message received from the message transmission / reception cable 211 to the message transmission / reception processing unit 202 through the rear substrate 203.

The message transmission / reception cable 211 receives a message from the node transmission / reception cable matching unit 210 as a node-to-node message transmission / reception cable 211 for transmitting and receiving messages with another node, and receives the received message. The message is sent to another node via a cable 211 connected between the nodes.

Referring to the inter-node message path shown in FIG. 3, the message configured and transmitted by the processor 301 of the node N (processor board 300) is transmitted and received between the node through the message transmission / reception processing unit 302 in the board 300. The message is transmitted to the matching unit 310, the message received in the inter-node message transmission and reception cable 211 is connected to the other node 300 is transmitted to the message transmission and reception cable matching unit 410 of the other node and then the board 400 Message is transmitted to the processor 401 of the node N + 1 (processor board 400).

From this operation, the processors 201, 301, and 401 of the different nodes independently transmit and receive the transmission / reception path test message to the counterpart node, respectively, and grasp the message transmission / reception path status between the nodes by itself.

In addition, messages transmitted from the processors 201, 301, and 401 in the boards 200, 300, and 400 are transmitted to other nodes. When a failure occurs during transmission to other nodes, the processors 201, 301, and 401 each loop using a loop back function. Send / receive path test message is sent separately. That is, the message of the loopback function is first sent to the message transmission / reception processing unit 202, 302, 402, and if the path is normal, the message is sent back to the cable matching unit 203, 303, or 403 to check whether there is a failure step by step, and to normalize its own node. You can check whether or not. If a failure occurs during the test using the loopback function, it can be identified as a failure of the device.

Here, a loopback message in a telephone or switching system is a test signal sent to a network destination, and the signal is returned to the place where the original signal was sent as the received signal. The returned signal can help diagnose the problem. Sending loopback tests one at a time to devices in each telephone and switching system is a technique to isolate the problem.

4 is an initialization operation state diagram in the inter-node message path test start flow diagram in the exchange, and the processors 201, 301, and 401 independently initialize the related data in order to determine the inter-node message transmission path state (S401). In addition, the message path step between nodes currently being tested is initialized (= 0) (S403) and the number of test message transmissions between nodes (S403), and a timer operating at a predetermined period (for example, 4 seconds) is also set. (S404).

FIG. 5 is a flow chart of a node-to-node message path test start in the exchange, in which each node attempts to test the message transmission / reception path between nodes at regular intervals by driving the set timer (S501 and S502). Receive the path test message and process the received message (S503, S504), receive the loopback test message attempted when the path test message is not received, and proceed to receive and process the received loopback test message. (S505, S506).

FIG. 6 is a flowchart illustrating a mutual monitoring method for message paths between nodes, and after each node determines whether a state between nodes is normal (S601), when the state between nodes is normal, transmits a message transmission / reception path test message between nodes. In operation S602, the number of test message transmissions (that is, the timer value) is increased once (S603).

In this case, the number of test message transmissions is compared with a set reference value (for example, 4 times), and when the message is received within the comparison value below the reference value (ie, less than 4 times), that is, within the reference value, it is confirmed that the inter-node message is in a normal state. . However, if the message is not received again during the threshold value (more than 4 times), that is, the threshold value is greater than or equal to the message transmission and reception path failure state between nodes (S605), and the message path step between the node currently being tested message transmission and reception processing unit in the board (S606), the inter-node state is updated to the fault state (S607).

Then, when the inter-node message is in a failure state as a result of the determination in step S601, the message path (path A, path B) currently being tested is selected (S611), and the selected path (path A = on-board message transmission / reception processing unit) is selected. The loopback test message is transmitted to the corresponding path (message transmission / reception processing unit) and the number of test message transmissions is increased by one (S612, S613). When the number of test transmissions is compared with a reference value (S614), if a message is received within the reference value, the path is updated to a normal state, and if the message is not received for more than the reference value, the message is transmitted to the message transmission / reception processing part of the board. And update to the loop back failure state (S615, S616).

If the selected path in the board (path B = inter-node message transmission / reception cable matching unit), the loopback test message is transmitted to the transmission / reception cable matching unit, and the number of test message transmissions is increased once (S621, S622). After comparing the number of test message transmissions with the reference value (S623), if the test message is received again within the reference value, the corresponding path is updated to the normal state, and the board is judged to be normal, and if the test message is not received for more than the reference value, the node. The inter-message transmission and reception cable matching unit reports that the failure state (S624), and updates the loopback state to the failure state (S625).

In other words, if the loopback test is conducted through all the paths of the board, if the number of transmissions is less than the threshold value, the board can recover the normal state or the fault state, indicating that the hardware is all normal. It can be seen that there is a failure state in the corresponding path.

7 is a case in which the state of the node is restored in the inter-node message path test start flow diagram in the exchange. If the inter-node message transceiving path test message is received and processed, each node has a failure state (S701). Report that the inter-message transmission and reception path failure state recovery (S702), and updates the normal state between the nodes (S703). The test message transmission frequency is initialized to 0 (S704).

FIG. 8 is a loopback test message test flow chart in a node-to-node message path test flow diagram. The loopback test message is received and processed, and then the message path between nodes currently being tested is checked (S801). In the case of the path of the processing unit (path A), the message transmission and reception of the message transmission and reception processing unit in the board is reported (S802), and the message path step between nodes currently being tested is updated to the next step, the inter-node message transmission / reception cable matching unit (S803).

If the inter-node message transmit / receive cable matcher path reports that the inter-node message transmit / receive cable matcher is failing recovery (S806), the inter-node message path step currently being tested is initialized to the next step, the inter-node message transmit / receive path (S807). .

When any test in the board is restored (S803) (S807), the loop back state in the restored path is updated to a normal state (S804), and the number of test message transmissions is initialized to 0 (S805).

As described above, according to the inter-node message path step monitoring method according to the present invention, by independently testing the transmission and reception path test message or loopback message in each node, any node of the plurality of nodes configured in one system In the event of a message transmission / reception failure between the nodes, the hardware or node in the path of the message transmission / reception path is automatically identified so that the hardware on the failed message transmission / reception path can be replaced and repaired. If so, action can be taken quickly.

Claims (5)

Transmitting a transmission / reception path test message to another node independently at a specific node; Updating a transmission / reception path with the other node to a failure state if the transmitted test message is not received from another node; Transmitting a loopback test message to any transmission / reception path existing between the specific board and another board if the transmission / reception path with the other node is in a failure state; If the transmitted loopback test message is not received within a predetermined number of times from the corresponding path, updating the transmission / reception path with the corresponding path to a failure state and identifying a failure state of the hardware of the corresponding path. How to monitor messages step by step. The method of claim 1, The loopback message on the specific board is tested step by step from the transmission and reception close to the specific board among the transmission and reception paths existing between the specific board and another board. The method of claim 1, Confirming the updated node state and reporting a failure state recovery of the inter-node message transmit / receive path when a failure state is received by the specific board within a reference value; And updating the inter-node state to a normal state when the inter-node failure state is restored. The method of claim 1, Receiving a loopback test message transmitted on an arbitrary path at the specific board, reporting a hardware failure state recovery of the corresponding path; When the failure state of the arbitrary path is restored, subjecting the loopback test message transmitted to the corresponding path to a matching line between other nodes: when a loopback message is received from the matching line between the nodes, receiving and transmitting a path test message as a target message between nodes. Initializing a transmission / reception path; And updating the loopback state to a normal state when the failure state is updated to a recovery state. The method of claim 1, Transmitting and receiving path test message and loopback test message transmitted and received from the specific board increase the counter during transmission at regular time intervals, and if it does not receive within the reference value, checks as a failure state with the corresponding path, and if received within the reference value, The mutual monitoring method for each message path between nodes, characterized by updating to a normal state.