JP3033506B2 - Alarm data collection method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for collecting alarm data in a wireless communication system.

[0002]

2. Description of the Related Art Conventionally, collection of alarm data from a secondary station connected to a primary station by a radio line is usually performed by a polling method.

[0003] However, in this system, the line quality between the primary station and the secondary station may be degraded due to the fading peculiar to the radio line, and the transmission data error may occur in the alarm data from the secondary station. In some cases, it was not possible to collect secondary station alarms.

[0004] In order to solve this problem, a retransmission procedure system is used in which, when an error is detected in data from the secondary station in the primary station, data is again requested from the secondary station.

[0005] When the line quality of the wireless line is degraded, the secondary station accumulates the collected alarms in its own station, and after the line quality has been restored to normal, transmits the alarm to the primary station, thereby transmitting the primary alarm. The station was collecting secondary station alerts.

Further, by transmitting the alarm status change information from the secondary station to the primary station, the data length of the alarm data is made variable without transmitting all the alarm data, the data length is suppressed, and the line quality is reduced. A method of reducing the probability of occurrence of a transmission line error in alarm data to the primary station due to deterioration of the primary station has also been used.

[0007] For example, in Japanese Patent Application Laid-Open No. Sho 60-126, two data lines for alarm collection are prepared, and alarm data is transmitted from the secondary station to the primary station on each line. A fault monitoring method that compares the alarm data of two lines received by the primary station and, if the data received by each line is identical, updates the alarm data to prevent a data transmission line error. Has been proposed.

[0008]

However, the above-mentioned conventional system has the following problems.

First, in the above-described conventional retransmission procedure system, when the line quality is degraded, there is a possibility that many alarms are generated, so that the amount of data to be retransmitted increases, and during retransmission, There is a problem that a transmission line error may occur, and eventually, the alarm of the secondary station may be lost. Also, because retransmission is repeated,
There is also a problem that an alarm having a high degree of urgency may not be immediately transferred to an external alarm processing device.

Next, when the line quality is degraded, 2
In the conventional method of storing the alarms collected at the next station and transmitting the alarms to the primary station after the line quality is restored to normal, an alarm with high urgency is immediately sent to the primary station. In addition to the problem that it is not possible, a large amount of alarm data may be sent to the primary station when the line is restored. For this reason, the alarm collected by the secondary station after the line is restored may not be immediately transmitted to the primary station, and the alarm data of the secondary station may be lost.

Also, the alarm status change information is transmitted from the secondary station to the
In the conventional method of transmitting to the next station, when the line quality is degraded, the occurrence of an alarm is repeated, so that the data length is not shortened and the data is transmitted from the secondary station to the primary station. During the transmission, a transmission path error may occur in the alarm data.

Further, in the method described in Japanese Patent Application Laid-Open No. Sho 60-126, a data line for collecting alarms is connected to two lines.
As the line, the primary station compares the received data of each line and if they match, the alarm data is updated to prevent data errors. However, in the case of a wireless line, two lines are simultaneously transmitted due to fading. In some cases, the quality may deteriorate.
The alarm data of the next station may not be collected.

Accordingly, the present invention has been made in view of the above problems, and has as its object to collect alarm data of a secondary station even in a situation where the line quality is degraded. Accordingly, it is an object of the present invention to provide an alarm data collection method with particularly improved reliability.

[0014]

In order to achieve the above object, the present invention provides an alarm data collection system in which a primary station connected to an external alarm processing device collects an alarm from a secondary station via wireless transmission. In the above, the primary station monitors the line quality between the primary station and the secondary station, and changes the alarm data collected from the secondary station according to the degree of the line quality. The secondary station, based on the notification information from the primary station, sorts out the alarm information collected by the local station, and outputs the alarm data having a data length suitable for the line quality to the primary station. Send to

According to the present invention, in a micro radio communication system, a radio station connected to an external alarm processing device is a primary station,
In an alarm data collection method in which the opposite station is a secondary station and an alarm of the secondary station is collected by a polling signal from the primary station, the primary station collects an alarm of its own station,
Means for detecting the deterioration of the quality of the radio line, means for determining the rank of the alarm of the secondary station to be collected according to the line quality, and selection of the alarm collected by the own station according to the determined alarm rank, and external alarm Means for sending to a processing device; means for requesting alarm data of the determined alarm rank to a secondary station;
In the secondary station, the means for collecting the alarm of the own station, the means for analyzing the request data from the primary station, and the collected alarm are selected according to the rank of the alarm to be transmitted to the primary station as a result of the analysis. Means for transmitting the selected alarm to the primary station, and the primary station includes means for transmitting the received alarm of the secondary station to an external alarm processing device.

In the present invention, transmission from the secondary station to the primary station is performed by varying the amount of alarm data of the secondary station to be collected according to the line quality between the primary station and the secondary station. By making the data length of the data variable and lowering the probability that a transmission line error occurs in the alarm data during communication from the secondary station to the primary station, a high degree of urgency can be achieved even in a situation where the line quality is degraded. An alarm can be reliably reported to the primary station.

[0017]

Embodiments of the present invention will be described below. FIG. 4 shows an overall configuration of an alarm data collection method by the wireless communication system according to the embodiment of the present invention. The alarm from the secondary station 3 is transmitted to the primary station 2 via wireless communication, and the primary station 2 notifies the external alarm processor 1 of the alarm of the secondary station 3 together with the alarm of its own station. In the embodiment of the present invention, the primary station connected to the external alarm processor 1 monitors the line quality between the primary station and the secondary station, and ranks the data length according to the line quality. Requests the secondary station to send an alarm, and the secondary station sends a warning to the primary station based on the rank information specified by the primary station, categorizing the alarm information collected by its own station into ranks. However, when the line quality is degraded, the length of the alarm data from the secondary station is shortened to suppress the occurrence of transmission errors.

That is, the embodiment of the present invention controls the amount of alarm data of the secondary station to be collected in accordance with the line quality between the primary station and the secondary station so as to vary the amount of alarm data. By making the data length of the transmission data to the primary station variable, the probability that a transmission path error occurs in the alarm data at the time of communication from the secondary station to the primary station is reduced, thereby reducing the line quality. In the case of, the alarm of high urgency can be
Report to the next station.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. Referring to FIG. 1, primary station 2 and secondary station 3
Are connected by a communication line, and the primary station 2
It is connected to an external alarm processing device 1 that processes the alarm of the next station 3.

The primary station 2 has an alarm collection processing section 9 for collecting alarms of its own station, a line quality monitoring section 4 for monitoring the quality of the line 11 between the primary station and the secondary station, and a line quality monitoring section. An alarm collection rank determining unit that calculates an allowable data length within a range in which a transmission line error does not occur between the primary station and the secondary station based on the line quality detected by 4 and determines an alarm of the secondary station to be collected. 5, an alarm selection unit 8 for selecting an alarm determined by the alarm collection rank determination unit 5, and an alarm data request transmission unit 6 for transmitting the alarm rank determined by the alarm collection rank determination unit 5 to the secondary station 3. And is provided.

In this embodiment, it is assumed that the ranks for alarms are set in advance, and the number of alarms of the highest rank can be determined from the secondary station to the primary station without error even in a situation where the line quality is deteriorated. The data length is set so that it can be transmitted to the station.

When the secondary station 3 detects a request for transmitting alarm data to the primary station by the reception data analysis section 7 'for performing processing for receiving alarm request data from the primary station 2, the alarm selection section 8 ', The alarm specified by the received data analysis unit 7' is selected from the alarms of the own station collected by the alarm collection processing unit 9 ', and the alarm data transmission unit 10 sets the rank of the alarm and the alarm to the primary level. Transmit to station 2.

The primary station 2 checks the error of the data frame of the alarm of the secondary station 3 by the reception data analysis unit 7,
Output to the external alarm processing device 1.

The sequence of this embodiment will be described below in detail.

First, the primary station 2 normally operates at regular intervals.
The alarm of the next station 3 is collected and output to the external alarm processing device 1 together with the alarm of the own station.

Next, when the line quality monitoring unit 4 detects the deterioration of the line quality between the primary station and the secondary station, the alarm collection rank determining unit 5 responds to the condition of the line quality from the line quality monitoring unit 4 according to the status of the line quality. Calculate a data length allowed between the primary station 2 and the secondary station 3 within a range where a transmission path error does not occur during transmission of the alarm data, and collect the data length so as to be less than the calculated data length. Determine the station's alert rank.

Based on the determined alarm rank, the alarm selector 8 selects the alarm collected by the station itself, outputs the selected alarm to the external alarm processor 1, and simultaneously transmits the alarm data request transmitter 6.
Transmits the alarm rank determined by the alarm collection rank determining unit 5 to the secondary station 3.

In the secondary station 3, when a reception data analysis unit 7 'for receiving alarm request data from the primary station 2 detects a request for transmission of alarm data to the primary station, an alarm selection unit 8' ′, Selects the collected alarms from the alarms of the own station collected by the alarm collection processing unit 9 ′ according to the rank of the alarm to be transmitted to the primary station 2 specified by the received data analysis unit 7 ′, The alarm transmission unit 10 transmits the alarm and the rank of the alarm to the primary station.

The primary station 2 uses the received data analysis unit 7 to
After performing an error check on the data frame of the alarm from the next station 3, an alarm from the secondary station 3 is output to the external alarm processing device 1. Here, when an error is detected in the data frame, a retransmission request is made to the secondary station 3. The error check of the frame is performed by the error check bit of the frame.

In FIG. 1, a portion for multiplexing / demultiplexing a signal for communicating alarm data between the primary station 2 and the secondary station 3 into a main signal is omitted.

FIG. 2 is a diagram showing an example of a frame format of alarm request data from the primary station 2 to the secondary station 3 in one embodiment of the present invention. As shown in FIG. 2, the alarm request data includes a flag (F), a secondary station address (A),
The data request (C), alarm rank information (D), frame check sequence (FCS), and flag (F) are included. FIG. 3 is a diagram showing an example of a frame format of alarm data from the secondary station 3 to the primary station 2 in one embodiment of the present invention. As shown in FIG. 3, a flag (F), a primary station address (A), a data response message (C), an alarm rank and alarm data (D), a frame check sequence (FCS), and a flag (F) are included. In.

[0033]

As described above, the present invention makes the data length of the alarm data from the secondary station to the primary station variable according to the line quality between the primary station and the secondary station. Effect of reducing the probability that a transmission line error occurs in the alarm data during communication from the mobile station to the primary station, and collecting an alarm with a high degree of urgency even in a situation where the line quality is degraded To play. In addition, the present invention can reliably collect secondary station alerts in combination with the retransmission procedure. Further, according to the present invention, the state in which the communication line cannot be used is reduced, so that the line efficiency of the communication line can be improved.

[Brief description of the drawings]

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

FIG. 2 is a diagram showing an example of a frame format of an alarm request signal from a primary station to a secondary station in one embodiment of the present invention.

FIG. 3 is a diagram showing an example of a frame format of an alarm data signal from a secondary station to a primary station in one embodiment of the present invention.

FIG. 4 is an overall block diagram of an alarm data collection method according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 External alarm processing apparatus 2 Primary station 3 Secondary station 4 Line quality monitoring part 5 Alarm collection rank determination part 6 Alarm data request transmission part 7 Received data analysis part 8 Alarm selection part 9 Alarm collection processing part 10 Alarm data transmission part

Claims (3)

(57) [Claims] 1. An alarm data collection system in which a primary station connected to an external alarm processing device collects an alarm from a secondary station via wireless transmission, wherein the primary station has the primary station and the secondary station. Monitoring the line quality between the next stations, and notifying the secondary station that the alarm data collected from the secondary station is varied according to the degree of the line quality; Alert information collected by the local station based on the notification information from the first station and transmitting alarm data having a data length suitable for the line quality to the primary station. 2. An alarm data collection system in which a primary station connected to an external alarm processing device collects an alarm from a secondary station via wireless transmission, wherein the primary station is configured to include the primary station and the secondary station. Means for monitoring the line quality between the next stations, and requesting the secondary station to select and transmit an alarm of a rank having a data length according to the line quality, the secondary station comprising: Means for selecting a rank from the alarm information collected by the own station based on the rank information designated by the next station and transmitting the selected rank to the primary station;
An alarm data collection method, wherein the length of the alarm data from the secondary station is shortened to control occurrence of a transmission error. 3. In a micro radio communication system, a radio station connected to an external alarm processing device is a primary station and an opposite station is two.
In an alarm data collection method for collecting an alarm of a secondary station by a polling signal from the primary station as a next station, the primary station collects an alarm of its own station, and detects deterioration of radio line quality. Means for determining an alarm rank of a secondary station to be collected in accordance with the line quality; means for selecting an alarm collected by the own station based on the determined alarm rank, and transmitting the selected alarm to an external alarm processing device; Means for requesting alarm data of the determined alarm rank to a secondary station, wherein the secondary station collects alarms of its own station, and means for analyzing request data from the primary station; As a result of the analysis, according to the rank of the alarm transmitted to the primary station,
Means for selecting the collected alarm, and means for transmitting the selected alarm to the primary station. The primary station includes means for sending the received alarm of the secondary station to an external alarm processing device. By varying the amount of alarm data of the secondary station to be collected according to the line quality between the primary station and the secondary station,
The line quality is degraded by making the data length of the transmission data from the next station to the primary station variable and lowering the probability that a transmission line error will occur in the alarm data during communication from the secondary station to the primary station. An alarm data collection system characterized in that an alarm with a high degree of urgency can be reliably reported to a primary station even under circumstances.