JP2705683B2 - Network alert collection method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a network alarm collection method, for example, a network alarm collection method between one center device and a plurality of local devices connected by a multi-drop line.

[0002]

2. Description of the Related Art Conventionally, a network alarm collection method is generally constructed as a monitoring system using a multi-drop line of a LAN (local area network) also called a loop network, a ring network or the like. As a method of collecting alarms of a network as the first conventional example, a polling / selecting method in which a center device individually polls each local device is used. This method is a method in which selecting / polling is sequentially performed on all the local devices connected to the center device, and the local device that has received the selection notifies (responds) alarm information in the next polling.

[0003] Japanese Unexamined Patent Publication No. 2-45866 "Centralized monitoring system" of the prior art 2 discloses a control unit for controlling the operation of each required unit, an alarm collecting circuit for collecting monitoring information of a high urgency set in advance, and And a data link interface for connecting the monitored exchange to the monitoring station or the alarm collection circuit, and the control unit, when collecting the monitoring information with high urgency at a predetermined cycle, directly Controlling the data link interface to connect the alarm collection circuit to the corresponding monitored exchange, transmitting the monitoring information from the corresponding monitored exchange to the alarm collection circuit, and then controlling the data link interface; Then, the alarm collection circuit is connected to a predetermined monitor, and the transmitted monitoring information is transferred to the connected monitor. This makes it possible to quickly collect urgent monitoring information at a specific monitoring platform.

[0004] Japanese Patent Application Laid-Open No. 2-127894 "Alarm collection system" of the prior art 3 outputs a strobe signal for collecting an alarm to a plurality of alarm collection units at the same time, and outputs the strobe signals simultaneously by the same clock pulse. By taking a wired OR, the alarm generation status of all alarm collection units can be checked at the same time. Therefore, even if the number of terminals is the same as that of the conventional serial data link, there is an effect that the processing can be completed by one clock pulse regardless of the number of alarm collection units.

[0005]

However, in the polling / selecting method of the above-mentioned prior art example 1, when the number of local devices connected by a multidrop line increases,
The polling cycle for the local device becomes longer. For this reason, there is a drawback that the display of the alarm information generated by a certain local device at the center device is delayed by a polling cycle to the relevant local device. In addition, there is no concept of priority in alarm collection, and the resulting delay involves a problem of delaying acquisition of an important alarm which may be a main cause of trouble.

The "centralized monitoring system" of the second conventional example has a complicated hardware configuration. Further, the “alarm collection method” of Conventional Example 3 has a problem that the importance of the content of the alarm is not identified, and the recognition of an alarm requiring urgency may be delayed.

An object of the present invention is to provide an alarm collection method for a network which enables quick collection of important alarms.

[0008]

In order to achieve the above object, a method for collecting alarms in a network according to the present invention comprises a center device and a plurality of local devices each having a center device as a center and using a synchronous LAN. It is a network alarm collection method that is connected by a drop line and the center device monitors the alarm generated from the local device,
An alarm request assigning step of assigning a priority to each type of alarm, an alarm request transmitting step of transmitting an alarm request with a priority code added from the center device to the local device in a network synchronization for each priority, and a local device. Receiving an alarm request, and transmitting an alarm response in a predetermined time slot corresponding to the priority code added in the alarm request and assigned to the local device. Receive the alarm response and monitor the network.

It is preferable that the alarm response is made at a predetermined cycle determined for each priority order, the predetermined cycle is made variable, and the alarm response received by the center device is displayed on a monitor.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a network alarm collection method according to the present invention; Referring to FIG. 1, there is shown an embodiment of a method for collecting alarms in a network according to the present invention. FIG. 1 is a network configuration diagram to which an embodiment of the present invention is applied.

In the configuration diagram of the network shown in FIG.
Reference numeral 0 denotes a multi-drop line using a synchronous LAN, 1 denotes a center device, 3a, 3b, and 3c denote local devices connected to the center device by a multi-drop line, and 2 denotes a network synchronous clock supply device.

FIG. 2 is an alarm request-response relationship diagram showing a method of collecting alarms from the local device 3 in the center device 1. As shown in FIG. 2, in response to an alarm request from the center device 1 to which a priority synchronized with the network synchronization clock is added, each of the local devices 3a, 3b, and 3c issues an alarm according to the alarm request at a fixed timing. Respond to 1. This fixed timing means that each local device 3a,
These are fixed time slots assigned to 3b and 3c.

In FIG. 2, reference numeral 20 denotes a time slot of an alarm request from a center device to which a priority is added,
0a is a time slot corresponding to the response from the local device 3a, 30b and 30c are local devices 3b,
3c represents a time slot corresponding to a response from 3c.

FIG. 3 shows an example of the configuration of the alarm collection sequence. The sequence of the present embodiment shown in FIG. 3 is configured by responses from the local devices 3a, 3b, and 3c corresponding to the alarm requests of the request priorities 1, 2, and 3. The contents of this sequence will be described below.

(1) is a sequence corresponding to an alarm request. In this sequence (1), an alarm request of priority 1 is sent from the center device 1 to each of the local devices 3a,
3b and 3c. The sequence (1) corresponding to the alarm request includes a request, a response a from the local device 3a, a response b from the local device 3b,
A response c from the local device 3c.
An alarm request of priority 1 that excites the sequence (1) is transmitted every period t1, and the sequence (1) having the above configuration corresponding to the alarm request is sequentially collected by the center device 1 via the multidrop line 10. .

Sequences (2) and (3) corresponding to the alarm request and have the same configuration as the sequence (1), and are as follows.

An alarm request of priority 2 is transmitted from the center device 1 to each of the local devices 3a, 3b and 3c. Sequence (2) corresponding to this alarm request
Is composed of a request, a response a from the local device 3a, a response b from the local device 3b, and a response c from the local device 3c. The priority 2 alarm request that excites the sequence (2) is transmitted every cycle t2, and the sequence (2) having the above configuration corresponding to the alarm request is sequentially collected by the center device 1 via the multidrop line 10. .

An alarm request of priority 3 is transmitted from the center device 1 to each of the local devices 3a, 3b and 3c. Sequence (3) corresponding to this alarm request
Is composed of a request, a response a from the local device 3a, a response b from the local device 3b, and a response c from the local device 3c. The priority 3 alarm request for exciting the sequence (3) is transmitted every period t3, and the sequence (3) having the above configuration corresponding to the alarm request is sequentially collected by the center device 1 via the multi-drop line 10. .

The transmission cycle (= collection cycle) of each alarm request is shorter as the priority is higher. In the present embodiment, t1 <t2 <t3.

The response to each of the local devices 3a, 3b, 3c in response to the above-mentioned alarm request is accented. That is, each local device 3a, 3
In providing information from b and 3c to the center apparatus 1, sorting is performed according to the degree of importance / urgency. This distribution is based on the priorities 1, 2, and 3. For example, information that requires urgency includes three types of alarm requests,
, Provides information for the earliest alarm request. However, for information of low importance, the provision of information is made only for alarm requests.

According to the above-described embodiment, between one center device and a plurality of local devices connected by a multi-drop line, an alarm generated in all local stations is performed once by a single alarm request from the center device. Can be collected. For this reason, it becomes possible for the center device to collect an alarm generated in each local station in a time as short as possible. In addition, it is possible to transmit an alarm request from the center device for each alarm priority, and by making each alarm request cycle variable, the delay time from the occurrence of an alarm at each local station to the reception at the center device can be reduced. It is possible to control and quickly collect occurrences of important alarms.

The above embodiment is an example of a preferred embodiment of the present invention, but the present invention is not limited to this, and various modifications can be made without departing from the gist of the present invention.

[0023]

As is apparent from the above description, the method for collecting alarms in a network according to the present invention assigns a priority to each type of alarm, and transmits an alarm request to which a priority code is added by network synchronization for each priority. Transmit from the center device to the local device. The local device receives the alarm request and transmits an alarm response in a predetermined time slot corresponding to the priority code added in the alarm request and assigned to the local device. The center device receives the alarm response and monitors the network.

By allocating the information as described above and collecting the information with high priority with priority, the collection of important alarms can be shortened. The delay time in collecting alarms from the local device in the center device is made as short as possible, and priority collection of important alarms that may be the main cause of troubles becomes possible. The importance of shortening the collection of important information increases with the expansion of the LAN system.

[Brief description of the drawings]

FIG. 1 is a network configuration diagram to which an embodiment of a network alarm collection method according to the present invention is applied;

FIG. 2 is an alarm request-response relationship diagram.

FIG. 3 is a diagram illustrating a configuration example of an alarm collection sequence.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Center device 2 Network synchronous clock supply device 3 Local device 10 Multidrop line using LAN 20 Time slot corresponding to alarm request from center device 30 Time slot corresponding to response from local device

Claims (4)

(57) [Claims] 1. A network in which one center device and a plurality of local devices are connected by a multi-drop line centered on the center device and using a synchronous LAN, and the center device monitors an alarm generated by the local device. In the alarm collecting method, an alarm priority assigning step of assigning a priority to each type of the alarm, and an alarm request having the priority code added from the center device to the local device is synchronized with the network for each priority. An alarm request transmitting step for transmitting; the local device receives the alarm request, and responds to an alarm response at a predetermined time slot corresponding to the priority code added in the alarm request and assigned to the local device. And an alarm response step of transmitting the Alarm method for collecting network, characterized in that to receive the alarm response monitoring said network. 2. The method according to claim 1, wherein the alarm response is made at a predetermined cycle determined for each priority. 3. The method according to claim 2, wherein the predetermined cycle is variable. 4. The method according to claim 1, wherein the alarm response received by the center device is displayed on a monitor.