JPH0243844A - Node accident countermeasure system - Google Patents

Abstract

PURPOSE:To avoid a defect that the communication of users under the control of an accident node is intermitted till a new line is installed by setting a commu nication line to users connecting to the accident node via a public packet exchange network from other nodes. CONSTITUTION:When a node, e.g., 3 stops its function due to an accident, the operator of the node 2 gives an operation command for countermeasure of node accident while designating that the node 3 has the accident. Then the node 2 being a deputy node retrieves its own data and identifies a node 12 connecting to the node 3 and sets a new communication line 15 to the node 12 via a public network 14. Then the node 2 uses the node 12 as a connection node to itself to register it to a data and completes the accident countermeasure processing. Thus, users 4, 5 attain the communication with the user center 1 via the communication line 15 to reduce the communication disabled time.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a node disaster countermeasure method used for recovery in the event of a node disaster in a packet switching network using dedicated lines using electronic exchanges.

[Prior Art] Conventionally, this type of packet switching network has a connection configuration shown in FIG. That is, in FIG. 1, l is the user center,
2, 3, 12.13 are nodes, 4.5 is a user connected to node 12, 6゜7 is a user connected to node 13, 8 is a user line, 9 is a middle car line, 10 is a communication path between the user 4 and the user center 1, and 11 is a communication path between the user 6 and the user center 1. And the node 12 is a node 13 for controlling the users 4 and 5 under the node 3.
is a user control node for controlling users 6 and 7 under node 2.

Here, if a certain node in the network, for example node 12, is damaged, the users 4.5 connected to that node 12
, install a new line to one of the other nodes 2, 3.13, and connect the other nodes 2, 3.1
Users 4 and 5 of newly affected No.F'12 in either of 3.
The data was changed in order to make it a user under the own node.

[Problems to be Solved by the Invention] In the above-mentioned type of packet switching network, when a node in the network is damaged, the network under the affected node is disabled until new lines to other nodes in the network are installed. The drawback was that the user's communications would be interrupted.

[Means for Solving the Problems] In order to eliminate such drawbacks, the node disaster countermeasure method according to the present invention is a method for dealing with node disasters in a packet switching network using a dedicated line using an electronic exchange. In the event of a functional outage, instructions from other nodes in the network will set up a new communication path for users connected to the affected node from the other node via the public packet switching network. This system is characterized in that a user who was connected to the disaster-affected node connected to the other node is registered as a user who is connected to himself at the other node.

[Embodiment] An embodiment of the node disaster countermeasure system according to the present invention will be described with reference to the drawings. In addition, in the following, parts that are common to the conventional one are given the same reference numerals, and redundant explanations will be omitted.

FIG. 1 shows an embodiment of the present invention, and shows a packet switching network after implementing node disaster countermeasures when node 3 is damaged.
In the figure, 14 indicates a public network, and 15 indicates a communication path set for node disaster countermeasures.

First, normal operation will be explained. Normally, users 4 to 7 operate on nodes 12.1, which are user control nodes. Node 13 and Node 2. Communication path 10 via node 3
．． 11, it communicates with the user center I.

Next, node disaster countermeasure processing when the node 3 stops functioning due to a disaster or the like will be explained.

When node 3 is damaged, node 12. Node 2 detects communication failure with node 3. Node 2 and node 12 perform switching to a backup line in order to restore communication with node 3, but because node 3 has stopped functioning, communication cannot be resumed.

When the operator of node 2 learns of the damage to linode 3 through communication from node 3, etc., he issues an operational command for node disaster countermeasures specifying that node 3 is damaged.

Next, node 2, which becomes an alternative node, searches its own data, identifies the node 12 connected to node 3, and performs a process of setting a new communication path 15 to node 12 via public network 14. 2 is communication path 1 to node 12
When the settings in step 5 are completed, the node 12 is registered in the data as a connection node with itself, and the disaster countermeasure processing is completed. This allows the user 4.5 to communicate with the user center 1 via the communication path 15.

[Effects of the Invention] As explained above, in the node disaster countermeasure method according to the present invention, when a certain node in a network is damaged and stops functioning due to a disaster, etc., the affected node can be restored by instructions from other nodes in the network. A user who was connecting to the disaster node that set up a communication path from the other node via the public packet switching network to the user who was connected to the disaster node, and newly connected to the other node. is registered as a user who is connected to himself on the other nodes mentioned above, so if a node in the network goes down due to a disaster etc., a new line for detouring can be created as before. This has the effect of significantly reducing communication downtime for users connecting to a disaster-affected node until the disaster-stricken node is installed or the disaster-stricken node is restored.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a node disaster countermeasure system according to the present invention, and FIG. 2 is a block diagram showing a conventional bucket switching network. User center 2, 3: Nodes 4 to 7: User 8: User line 9: Relay line 10, 11: Communication path 12.13
:User control node

Claims (1)

[Claims] In a packet-switched network that uses dedicated circuits using electronic exchanges, if a node in the network is damaged and stops functioning due to a disaster, etc., instructions from other nodes in the network will be sent to users connected to the affected node. Set up a communication path from the above other node via the public packet switching network, and connect the user who was connected to the above disaster node that was newly connected to the above other node to yourself on the above other node. A node disaster countermeasure method characterized by registering a user as a user.