JPH10173656A - Notice message transmission control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently filter information at the time of giving the notice of the state changes (communication alarm, fault information of device alarm and the like and the state change of package insertion/extraction and the like) of respective terminal points in a cross connection device to a network management device. SOLUTION: Terminating point information management parts 9a-9c decide the transmission propriety of a message which is information on the state change in accordance with notice generation inhibition lists 10a-10c. A transfer information management part 6 judges an urgency level according to an immediate notice condition list 7, and the message which requires immediate notice is transmitted to an event transfer selection part 4. Other messages are temporally accumulated in a management information accumulating part 8. The event transfer selection part 4 distributes the destinations of the messages to the network management devices 1a and 1b so as to select them.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a notification message transmission control system, and more particularly to a network management device for managing a communication network and a cross-connect device controlled by the network management device for performing cross-connection control of signals.
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a notification message transmission control system in a communication system in which a message is created at the time of a state change at each of a plurality of terminal points in a cross-connect device and notified to a network management device.

[0002]

2. Description of the Related Art In an optical communication network, a network management device for managing a communication network is provided, and a plurality of cross-connect devices perform cross-connect processing of optical signals under the control of the network management device. As a result, optical signal routing control is performed.

Each of the plurality of cross-connect devices has a function of performing the above-described cross-connect processing of an optical signal, and also monitors the state of a large number of terminal points inside the device, and when a state change occurs, the fact is notified. It has a function of notifying information to the network management device as a message.

FIG. 7 is a block diagram showing a control function of the notification message transmission of the cross-connect device. Referring to FIG. 7, the cross connect device (XC) 2
Has end point information management units 9a to 9c that manage the states of various end points in the apparatus.

Each of these end point information management units 9a to 9c
When the status of the subordinate endpoint changes, the agent 3 is notified as a message to the effect that the status has changed. Then, the agent 3 sends these messages to the network management device (CONT) 1a.

[0006]

In such a conventional notification message transmission control system, each of these end point information management units 9a to 9c communicates directly with the agent 3. Each end point information management unit 9a
9c determine whether or not to notify state change information as a message.

Therefore, there is a problem that the communication network cannot be managed from the viewpoint of the urgency of the message (whether to notify the message immediately or to temporarily store the message). In addition, the cross-connect device 2 is monitored and controlled not only by one network management device 1a but also by a plurality of network management devices including other network management devices (not shown in FIG. 7; see 1b in FIG. 1). In the case of such a configuration, there is also a problem that a destination (a destination to the network management device) cannot be selected for each message.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and an object of the present invention is to reduce the urgency of a notification message when a state change occurs in a cross-connect device. It is an object of the present invention to provide a notification message transmission control device which enables network management.

Another object of the present invention is to provide a notification message transmission control device which can select a destination for each notification message of a cross-connect device monitored and controlled by a plurality of network management devices.

[0010]

According to the present invention, there is provided a network management device for managing a communication network, and a cross-connect device for controlling cross-connection of signals controlled by the network management device. A notification message transmission control system in a communication system in which a message is created at the time of a state change at each of a plurality of terminal points and notified to the network management apparatus, wherein the cross-connect device comprises: Notification decision means for deciding whether or not to notify these state changes as a message in response to the state change of, and a notice message generation means for producing a notice message in response to the notice decision by the notice decision means Immediate notification determining means for determining whether or not to perform an immediate notification in response to receiving the notification message; An immediate notification means for transmitting the notification message in response to the determination of the immediate notification by the immediate notification determination means; and a network management of a predetermined destination in response to the reception of the notification message from the immediate notification means. And a transmission management means for transmitting the notification message to the apparatus.

The plurality of terminal points are divided into a plurality of groups, and the notification determining means determines whether or not a message can be notified of a state change of each terminal point corresponding to each of the groups. It is characterized by having been done.

[0012] Further, the immediate notification means has a storage means for storing the notification message in response to the determination of the non-immediate notification by the immediate notification determination means, and the transmission management means includes: There is provided a selecting means for determining whether or not to transmit a reception notification message to the network management apparatus and selecting the same, and a transmitting means for transmitting to the destination network management apparatus when the transmission is determined by the selecting means. It is characterized by the following.

Further, the notification message is classified in advance into a confirmation type / non-confirmation type, and the transmission management means further includes an identifier for identifying the confirmation type / non-confirmation type in the notification message. Means for assigning, a means for confirming a response after transmission to the network management device with respect to the notification message to which the confirmation type identifier has been added, and means for resending the notification message when no response is returned. Furthermore, retransmission of the notification message is repeated a predetermined number of times until the response is confirmed.

The operation of the present invention will be described. Fault information such as communication alarms and device alarms in the cross-connect device and notification messages of status changes due to package insertion / removal are sent to the network management device. More efficient filtering of notification messages (transmission selection control) by configuring the system in terms of necessity, urgency, destination management, and certainty of delivery
Becomes possible.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention, and the same parts as those in FIG. 7 are denoted by the same reference numerals. Referring to FIG. 1, the cross-connect device 2 is capable of communicating with a plurality of network management devices 1a and 1b (two in this example, but not limited thereto) via an agent 3. The status change in the cross-connect device 2 is sent as a notification message to the network management devices 1a and 1b. The notification message is sent to the network management device 1a in accordance with a destination predetermined by the event transfer selection unit 4 described later. , 1b.

A plurality of terminal point information management units 9a to 9c are provided in the cross connect device 2. Each of these terminal point information management units is provided with a plurality of functions in the cross connect device 2 to be managed. Each state of the block is constantly monitored, and when there is a change in the state, each of the end point information management units 9a to 9c is referred to the notification issuance prohibition lists 10a to 10c provided respectively. If the contents of the list (contents indicating whether or not emission is possible) indicate that emission is possible, a message indicating the state change is created.

The terminal point information management units 9a to 9c are provided for each group (three in this example, but not limited to this) when the monitoring targets are divided into groups.

The grouping will be described. For example, each hardware in the cross-connect device 9 has a different function (this is referred to as a different class).
And a plurality of packages having the same function but different package mounting positions to be monitored (referred to as different instances created from the same class). Grouped.

More specifically, in an actual optical transmission device, a plurality of packages (for example, a 150M optical interface board) having the same function (same class) are mounted for each opposing device. Since the function as the optical interface board is the same in any package, it is conceivable to define one "class" of "150M optical interface board" and generate "instances" according to the number of mounted boards.

The transmission apparatus also has a function of multiplexing / demultiplexing (MUX / DEMUX) signals from these optical interface boards. This function is different from the class of “150M optical interface board”. It will be defined as a class.

SDH used between such transmission devices
(Synchronous Digital Hier
ARCHY) There are a portion of the frame that is terminated by the repeater and a portion that is not terminated by the repeater. In the cross-connect device, both are terminated. Therefore, the above-described grouping can be divided into the following two groups depending on the function of the termination point targeted by the present invention.

In the present embodiment, the terminal point information management units 9a to 9c are provided for each of the grouped terminal points.
Is provided to monitor each state change of the terminal point in each group.

[0024] Notification emission prohibition lists 10a to 10c are provided corresponding to these end point information management units 9a to 9c, respectively. Each of the notification issuance prohibition lists 10a to 10c is a list in which whether or not notification can be issued is set in advance when a state change occurs at the terminal point of each group.

Accordingly, each of the terminal point information management units 9a to 9c refers to the corresponding notification prohibition list when the state change of each managed terminal point occurs, and determines whether the corresponding terminal point has a notification transmission permission. Only the notification message is generated and sent to the transfer information management unit 6.

The transfer information management unit 6 receives the notification message, and only when the notification message matches the immediate notification condition list 7 and has a high degree of urgency requiring immediate notification, the event transfer selection unit at the next stage. Then, the received notification message is transferred to the management information storage unit 8 for those of low urgency.

It is assumed that the instant notification condition list 7 is also created in advance.

The event transfer selection unit 4 determines whether or not to notify the agent 3 of the transfer notification message from the transfer information management unit 6 with reference to the event transfer selection list 5 and determines whether the notification message is a confirmation type message. The message is identified as a non-confirmation type, a confirmation type / non-confirmation type identifier is added to the message, and the message is sent to the agent.

The event transfer selection unit 4 further stores destination information for determining the destination (network management device 1a or 1b) of the received notification message, and when the cross-connect device 2 is activated. The agent 3 is notified of the destination of the notification message (for example, the network management device 1a for a confirmation type message, and the network management device 1b for a non-confirmation type message).

If the notification message is of the confirmation type, the event transfer selection unit 4 waits for a response to be returned. It has a function to repeat message retransmission. If the notification message is of the non-confirmation type, the process is completed only once.

The agent 3 determines whether the received notification message is a confirmation type / non-confirmation type (an identifier is assigned), determines a destination according to the determination result, and distributes the destination of the notification message. I do. For this purpose, it establishes a connection for communication with the network management devices 1a and 1b.

The operation of the embodiment of the present invention will be described below.

First, referring to FIG. 2, the operation of the end point information management units 9a to 9c is shown in a flowchart.
Each terminal point information management unit constantly monitors the state change of each terminal point under its control (S201). When there is a state change, each terminal point information management unit refers to the notification emission prohibition lists 10a to 10c held by each of them, and checks the state thereof. It is determined whether or not the change is notified to the transfer information management unit 6 (S202).

When the notification is determined, a notification message indicating the state change is created (S203) and sent to the transfer information management unit 6 (S204). FIG. 3 shows an example of the format of the notification message in this case. As shown in FIG. 3, this message always includes a class identifier 101 of the issuing instance, an issuing source instance identifier 102, an issuing time 103, and an event type 104 indicating a notification type such as a device alarm or a communication alarm. I have.

The format of the information 105 following the event type 104 differs depending on the event type. For example, when the event type is a communication alarm, the occurrence / recovery identifier, the degree of influence on the transmission path, and the like are included. When the event type is the device alarm, the information indicates the mounting position of the package.

FIG. 4 is a flowchart showing the operation of the transfer information management section 6. A plurality of end point information management units 9a to 9c
(S401), if the message satisfies the immediate notification condition (S402), an immediate notification is required. 4 (S4
03). Otherwise, it is temporarily stored in the management information storage unit 8 (S404).

It is assumed that the immediate notification condition list 7 lists in advance what value the value of a specific position in the format of the notification message in FIG. For example, "event type 104
Is a device alarm, the message of the other event type is stored in the management information storage unit 8 if the immediate notification is required.

FIG. 5 is a flowchart showing the operation of the event transfer selection section 4. As shown in FIG. 5, there are two processing functions of the event transfer selection unit 4, namely, a non-confirmation type message necessity determination process and a confirmation type message generation necessity determination process. Respond (S50
1) First, the necessity determination process of issuing a non-confirmation type message is performed.

In this non-confirmation type message emission necessity determination process, it is determined whether a message is emission necessity (S50).
2), this determination is made according to the event transfer selection list 5. The event transfer sorting list 5 is provided for both the non-confirmation type and the confirmation type. In this case, since the non-confirmation type issuance necessity determination processing, the non-confirmation type is used. The corresponding event forwarding screening list is referenced. In this case, the necessity of issuing is also determined based on the value of the specific position in the message format of FIG.

Then, an unconfirmed type identifier is given to the outgoing message determined to need to be issued (S503),
Issued to the agent 3 (S504).

After issuing to agent 3 or S50
After the determination as to whether or not to issue in step 2, the process of determining whether to issue the next confirmation message is performed. First, the necessity of issuing a received message is determined (S505). In this determination, as described above, the event transfer selection list corresponding to the confirmation type is referred to. Confirmation type identifiers are given to the issuance request and the issuance message (S506), and the agent 3
(S509).

In this case, since it is of the confirmation type, the process waits for a response from the agent 3 and ends the process when the response comes from the agent 3 (S511).

When the response from the agent 3 does not come within a predetermined time (timeout) (S510), retransmission is performed. At this time, the retransmission is repeated until the response of transmission OK is returned from the agent 3. Iteratively, for example, three times until a transmission OK response is received for the same message (S
507), if transmission OK is not returned even after the message is exceeded, this message is discarded (S508). Note that S
This message is also discarded if no emission is required at 505.

FIG. 6 is a flowchart showing the operation of the agent 3. When a notification message is received from the event transfer selection unit 4 (S601), it is determined whether the message is a confirmation type or a non-confirmation type (S602). In the event transfer selection unit 4, since an identifier indicating whether the notification message is a confirmation type or a non-confirmation type is given to the notification message, the determination can be made by referring to the identifier.

Then, the destination of this notification message is determined (S603, S604). As described above, the destination is determined by the destination information notified from the event transfer selection unit 4 when the event transfer selection unit 4 is started (for example, to the network management device 1a in the case of the confirmation type, to the network management in the case of the non-confirmation type). Management device 1b
To).

The reception notification message is distributed to the set destination. At this time, in order to transmit this message, the cross-connect device 2 and the network management device 1a
Alternatively, a connection is established between the communication device 1b and 1b (S60).
7, S608). In this case, if a connection has already been established (S605, S606), a message is transmitted using the connection (S609, S61).
0).

The network management device 1a returns a response because the received message is of the confirmation type. Therefore, the agent 3 waits for this response (S61
1) The response is sent to the event transfer selection unit 4 (S612).

For the confirmation type / non-confirmation type, the transmission destination is associated with the network management devices 1a / 1b, respectively.
This is merely an example, and various modifications are possible.

[0049]

As described above, according to the present invention, the termination point information management units 9a to 9c respond to the message indicating the change in the state of the monitoring information at the termination point of the cross-connect device.
, The first-stage filtering is performed according to whether or not the notification is issued, the transfer information management unit 6 performs the second-stage filtering according to whether or not the immediate notification is possible, and finally, the event transfer selection unit 4 performs the destination selection to perform the third-stage filtering. Filtering, so that it is possible to select a destination for each message when managing the network from the viewpoint of the urgency of the message or when monitoring and controlling by a plurality of network management devices. There is.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is an operation flowchart of terminal point information management units 9a to 9c.

FIG. 3 is a diagram illustrating a format example of a notification message.

FIG. 4 is an operation flowchart of a transfer information management unit 6;

FIG. 5 is an operation flowchart of the event transfer selection unit 4;

FIG. 6 is an operation flowchart of the agent 3.

FIG. 7 is a block diagram showing a monitoring function of terminal point information in a conventional cross-connect device.

[Explanation of symbols]

 1a, 1b Network management device 2 Cross-connect device 3 Agent 4 Event transfer selection unit 5 Event transfer selection list 6 Transfer information management unit 7 Immediate notification condition list 8 Management information storage units 9a to 9c Terminal point information management units 10a to 10c Notification issuance Ban list

Claims (6)

[Claims] 1. A network management device that manages a communication network, and a cross-connect device that is controlled by the network management device and performs cross-connect control of signals, wherein a state change at each of a plurality of terminal points in the cross-connect device. A notification message transmission control system in a communication system in which messages are respectively created and notified to the network management device, wherein the cross-connect device responds to a state change of each of the termination points, Notification determination means for determining whether or not to notify the change as a message; notification message generation means for generating a notification message in response to the notification determination by the notification determination means; and responding to the reception of the notification message. Notification decision means for deciding whether or not to perform immediate notification by means of Immediate notification means for transmitting the notification message in response to the determination of the knowledge, and transmission management for transmitting the notification message to a network management device of a predetermined destination in response to receiving the notification message from the immediate notification means Means, and a notification message sending control system, characterized by comprising: 2. The method according to claim 1, wherein the plurality of endpoints are divided into a plurality of groups, and the notification determining unit determines whether or not to notify a message regarding a state change of each of the endpoints corresponding to each of the groups. 2. The notification message sending control system according to claim 1, wherein: 3. The notification message according to claim 1, wherein the immediate notification unit includes a storage unit that stores the notification message in response to the determination of the non-immediate notification by the immediate notification determination unit. Delivery control system. 4. The transmission management means comprises: a selection means for determining whether or not to transmit a reception notification message to the network management device, and selecting the transmission notification message; The notification message transmission control system according to any one of claims 1 to 3, further comprising transmission means for transmitting the notification message to a network management device. 5. The notification message is classified in advance into a confirmation type / non-confirmation type, and the transmission management unit further provides an identifier for identifying the confirmation message / non-confirmation type in the notification message. Means, means for confirming a response after transmission to the network management device with respect to the notification message to which the confirmation type identifier has been added, and means for retransmitting the notification message when no response is returned. The notification message sending control system according to any one of claims 1 to 4, wherein: 6. The notification message transmission control system according to claim 5, wherein said transmission management means further repeats retransmission of said notification message a predetermined number of times until said response is confirmed. .