JPH11136272A - Alarm monitor and alarm monitoring method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a method for updateing newest information from a specific terminal station for a short period below a prescribed period in the case of applying polling control sequentially to a plurality of terminal stations for the prescribed period, by including a process where alarm information from collected information is detected and the sequence of polling control corresponding to the detected alarm information is determined. SOLUTION: Optical TAM burst transmission of a point-multi-point type is conducted and bidirectional communication is attained between a subscriber terminal station device SLT 10 and a plurality of optical network terminal equipment ONU20-1, 20-2,...20-n. The subscriber terminal station device SLT 10 applies polling control sequentially once to each of the optical network terminal equipment ONU20-1, 20-2,...20-n and collects alarm information raised by each of the optical network terminal equipment ONU20-1, 20-2,...20-n. The subscriber terminal station device SLT 10 applies at first polling control to the optical network terminal equipment ONU20-1 to receive information from the ONU 20-1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alarm monitoring device and an alarm monitoring method suitable for use in a two-way communication system for point-to-multipoint optical ATM burst transmission.

[0002]

2. Description of the Related Art A conventional point-to-multipoint type optical ATM burst transmission uses a subscriber line terminal (SL).
T) and a plurality of optical network termination units (ONUs), the SLT performs the OLT at a fixed cycle in each device.
Polling control for each ONU,
Was collecting warning information.

[0003]

For this reason, there has been a problem that even the latest information of an ONU that has issued an alarm cannot be collected until a certain time has elapsed. The present invention has been made under such a background, and even when polling control is sequentially performed on a plurality of terminal stations at a predetermined cycle, updating of the latest information from a specific terminal station is performed within a predetermined cycle or less. It is an object of the present invention to provide an alarm monitoring device and an alarm monitoring method that can be performed in a short cycle.

[0004]

In order to solve the above-mentioned problem, according to the first aspect of the present invention, polling control is performed for each of a plurality of terminal stations connected to a control station. An alarm collecting means for detecting alarm information from the collected information, and a polling determining means for determining an order of the polling control according to the detected alarm information. Also, in the invention according to claim 2, in the alarm monitoring device according to claim 1, the control station sequentially polls each of the plurality of terminal stations at a predetermined cycle, and determines the polling. The means increases the number of times of polling control for the terminal station that has issued the alarm information within the predetermined period. In the third aspect of the present invention, in the alarm monitoring device according to the second aspect, the polling determination unit may be configured to determine in advance the polling corresponding to each of the plurality of terminal stations and a type of the alarm information. A plurality of conditions for increasing the number of times of control are stored, and the number of times of polling control for the terminal station within the predetermined period is increased in accordance with the type of the terminal station that has issued the alarm information and the type of the alarm information. . Further, in the invention according to claim 4, alarm information is detected by alarm collection means from information collected by performing polling control on each of a plurality of terminal stations connected to the control station, and the detection is performed. The polling control means determines the order of the polling control in accordance with the alarm information. In the invention according to claim 5, in the alarm monitoring method according to claim 4, the control station sequentially polls each of the plurality of terminal stations at a predetermined cycle, and The number of times of the polling control is increased by the polling determining means for the terminal station which has issued the alarm information. In the invention according to claim 6, in the alarm monitoring method according to claim 5, the condition for increasing the number of times of the polling control corresponding to each of the plurality of terminal stations and the type of the alarm information is set. A plurality of polling controls are stored in advance in the polling determining means, and the number of times of polling control for the terminal station within the predetermined period is increased in accordance with the type of the terminal station that has issued the alarm information and the type of the alarm information.

According to the present invention, when an alarm is generated in one of the plurality of optical network terminating devices, the alarm which has generated the number of polling controls within a predetermined period for the optical network terminating device which has generated the alarm. Increase according to priority.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a konamono according to an embodiment of the present invention. As shown in FIG. 1, an SLT (subscriber line terminal equipment) 10 has an alarm collection function 11 and a polling frequency determination function 12, and has a plurality of optical network unit ONUs 20-1 and ONU2.
0-2, ONU 20-3,..., ONU 20-n are connected.

In FIG. 1, point-to-multipoint optical ATM burst transmission is performed to enable bidirectional communication between the SLT and a plurality of ONUs. This SL
T is ONU 20-1, ONU 20-2, ON
U20-3... The polling control of the ONUs 20-n is sequentially performed once, and alarm information issued by each ONU is collected.

FIG. 2 is a timing chart showing the state of the polling control in a normal state in the embodiment shown in FIG. As described above, the SLT first performs polling control on the ONU 20-1, and receives information from the ONU 20-1. Next, the SLT performs polling control on the ONU 2 and receives information from the ONU 20-2. Next, polling control is performed on the ONUs 20-3... ONU 20-n, and information is received from each ONU.

In this embodiment, in the normal state (any ONU
SLT does not issue an alarm)
0-1, ONU2, ONU20-3,.
Repeat with.

On the other hand, FIG. 3 is a timing chart showing the state of the polling control when any of the ONUs has issued an alarm in the embodiment shown in FIG. 1. Here, the ONU 20-3 has issued an alarm. Shows the case.

In the present embodiment, when the alarm collection function of the SLT detects an alarm from any ONU, the OLT that issued the alarm within the period T is sent to the polling frequency determination function.
Instruct the NU to increase the number of times of polling control.

That is, in FIG. 3, ONU2 in the first cycle T
During the polling control to 0-3, an alarm from the ONU 20-3 was detected. Therefore, the number of times of polling control for the ONU 20-3 in the period T is increased (the ONU 20-3 with a frame shown in FIG.
-3 indicates polling control). As a result, in the present embodiment, the time interval for updating the latest information from the ONU that has issued the alarm is shortened.

In FIG. 3, the ONU 20-3 that issued the alarm is shown.
On the other hand, the example in which the number of times of polling control in the cycle T is increased to two has been described, but the number of times of increase of the number of times of polling control for an alarm may be more than this.

For example, the alarm collecting function or the polling number determining function has a storage function for storing in advance the number of times of increasing the number of times of polling control for each ONU, the number of times of increasing the number of times of polling control for the type of alarm that has been issued, and the like. You can also.

[0015] Thereby, it is possible to give a priority of increasing the number of times of polling control corresponding to a specific ONU or a specific alarm type, and to shorten a time interval for updating the latest information from the ONU as necessary. it can.

[0016]

As described above, according to the present invention, when an alarm is generated in one of a plurality of optical network units, an alarm is generated within a predetermined period for the optical network unit in which the alarm is generated. The polling control count is increased according to the priority of the generated alarm, so that even when polling control is sequentially performed on a plurality of terminal stations in a predetermined cycle, updating of the latest information from a specific terminal station is performed in a predetermined manner. An effect is obtained that an alarm monitoring device and an alarm monitoring method that can be performed in a short cycle equal to or less than the cycle can be realized.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a consumer object according to an embodiment of the present invention.

FIG. 2 is a timing chart showing a state of polling control in a normal state in the embodiment.

FIG. 3 is a timing chart showing the state of polling control when any ONU issues an alarm in the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Subscriber line terminal equipment 11 Alarm collection function 12 Polling frequency determination function 20-1, 20-2, 20-3 ... 20-n Optical network terminal equipment

Claims (6)

[Claims] 1. An alarm collecting means for detecting alarm information from information collected by performing polling control on each of a plurality of terminal stations connected to a control station, and the polling corresponding to the detected alarm information. An alarm monitoring device comprising: a polling determination unit that determines a control order. 2. The control station sequentially performs polling on each of the plurality of terminal stations at a predetermined cycle, and the polling determination means performs polling control on the terminal station that has issued the alarm information within the predetermined cycle. The alarm monitoring device according to claim 1, wherein the number of times is increased. 3. The polling determining means stores in advance a plurality of conditions for increasing the number of times of the polling control corresponding to each of the plurality of terminal stations and the type of the alarm information, The alarm monitoring device according to claim 2, wherein the number of times of polling control for the terminal station within the predetermined period is increased in accordance with the type of the alarm information. 4. An alarm collecting unit detects alarm information from information collected by performing polling control on each of a plurality of terminal stations connected to a control station, and determines polling in accordance with the detected alarm information. An alarm monitoring method, wherein the order of the polling control is determined by means. 5. The polling is sequentially performed by the control station for each of the plurality of terminal stations at a predetermined cycle, and the polling determination unit polls the terminal station that has issued the alarm information within the predetermined cycle. The alarm monitoring method according to claim 4, wherein the number of times of control is increased. 6. The polling determining means stores in advance a plurality of conditions for increasing the number of times of the polling control corresponding to each of the plurality of terminal stations and the type of the alarm information, and the terminal station which has issued the alarm information and The alarm monitoring method according to claim 5, wherein the number of times of polling control for the terminal station within the predetermined period is increased in accordance with the type of the alarm information.