KR20230111983A - Device for predicting momentary breakoff of transport network and method of operation thereof - Google Patents

Abstract

Disclosed is an operation method of an apparatus for predicting short-term failure of a transmission network. An operation method of a simple failure prediction device of a transmission network according to the present invention includes the steps of acquiring optical signal reception strength information collected by an EMS from one or more transmission devices in a transmission network, determining whether a brief failure occurs in a line using the optical signal reception strength information, and calculating the duration of the brief failure using the optical signal reception strength information, wherein the optical signal reception strength information is collected at regular intervals according to the EMS standard, and the minimum value of the optical signal reception strength within one cycle, Include maximum and average values.

Description

Simple failure prediction device of transmission network and operation method of simple failure prediction device of transmission network

The present invention relates to an apparatus for predicting a simple failure of a transmission network and a method of operating the apparatus for predicting a simple failure of a transmission network, which can predict a simple failure of a transmission network using limited information collected by an EMS.

Various transmission equipment is deployed in a transport network (TN), and transmission equipment generates a failure alarm when a failure occurs.

However, in a transport network (TN), a simple failure also occurs, and a simple failure refers to a phenomenon in which the transmission of an optical signal is momentarily cut off for a short time. In addition, unlike other failures, transmission equipment does not generate failure alarms for simple failures, and therefore, transmission network operators cannot detect sequential failures unless they individually monitor real-time performance data of the entire transmission network. Therefore, from the perspective of the operator of the transmission network, it is the first time that a simple failure is recognized and dealt with only after the customer's VoC has occurred.

Meanwhile, the operator of the transmission network does not directly collect information from transmission equipment, but indirectly receives information generated from transmission equipment through EMS. In addition, due to the characteristics of a transmission network in which a large number of transmission equipment supplied by various manufacturers is deployed, it is difficult for the operator of the transmission network to collect information by interlocking with each transmission equipment. In addition, even if the information collected in real time is monitored at all times with great effort and cost, there is a problem in that it is difficult to accurately establish a standard for determining a simple failure considering all the characteristics of transmission equipment, line characteristics, distance between transmission equipment, etc.

The present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a simple failure prediction device of a transmission network and a method of operating the simple failure prediction device of a transmission network, which can predict a simple failure of a transmission network using limited information collected by an EMS.

An operation method of a simple failure prediction device of a transmission network according to the present invention includes the steps of acquiring optical signal reception strength information collected by an EMS from one or more transmission devices in a transmission network, determining whether a brief failure occurs in a line using the optical signal reception strength information, and calculating the duration of the brief failure using the optical signal reception strength information, wherein the optical signal reception strength information is collected at regular intervals according to the EMS standard, and the minimum value of the optical signal reception strength within one cycle, Include maximum and average values.

In this case, the step of determining whether the simple failure has occurred may include determining whether the simple failure has occurred according to the degree to which the minimum value of the optical signal reception intensity is reduced from a normal value.

In this case, the step of determining whether the simple failure has occurred may include determining the type of the simple failure according to the degree to which the minimum value of the optical signal reception intensity is reduced from a normal value when it is determined that the simple failure has occurred.

Meanwhile, determining whether the simple failure occurs may include determining the type of the simple failure according to a result of comparing the minimum value of the optical signal reception intensity with a preset threshold value.

Meanwhile, in the step of determining the type of transient failure, the maximum value included in the optical signal reception strength information may be set as the normal value, and a degree of decrease of the minimum value of the optical signal reception strength compared to the maximum value may be calculated.

Meanwhile, in the step of calculating the duration of the brief failure, the duration of the brief failure may be calculated using the minimum value, the maximum value, and the average value of the optical signal reception strength within the one cycle, and the length of the cycle.

In this case, the product of the average value and the length of the period may be equal to the sum of 'the product of the minimum value and the duration' and 'the product of the maximum value and the non-duration'.

In this case, the non duration may be a value obtained by subtracting the duration from the length of the period.

Meanwhile, the optical signal reception strength information may not include information about a time point and a length of time at which the value of the optical signal reception strength appears.

On the other hand, an apparatus for predicting short-term failure of a transmission network according to the present invention includes a communication unit that obtains optical signal reception strength information collected by an EMS from one or more transmission devices in a transmission network, and a control unit that determines whether a short-term failure occurs in a line using the optical signal reception strength information and calculates a duration of the short-term failure using the optical signal reception strength information. values and average values.

In this case, the control unit may determine whether or not the transient failure occurs according to the degree to which the minimum value of the optical signal reception intensity is reduced compared to a normal value.

In this case, when it is determined that the simple failure has occurred, the control unit may determine the type of the simple failure according to the degree to which the minimum value of the optical signal reception intensity is decreased compared to a normal value.

Meanwhile, the control unit may determine the type of the simple failure according to a result of comparing the minimum value of the optical signal reception strength with a predetermined threshold value.

Meanwhile, the control unit may set the maximum value included in the optical signal reception strength information as the normal value, and calculate the degree to which the minimum value of the optical signal reception strength is reduced compared to the maximum value.

Meanwhile, the control unit may calculate the duration of the transient failure using the minimum value, the maximum value, and the average value of the optical signal reception strength within the one period, and the length of the period.

In this case, the product of the average value and the length of the period may be equal to the sum of 'the product of the minimum value and the duration' and 'the product of the maximum value and the non-duration'.

In this case, the non duration may be a value obtained by subtracting the duration from the length of the period.

Meanwhile, the optical signal reception strength information may not include information about a time point and a length of time at which the value of the optical signal reception strength appears.

According to the present invention, an operator operating a large-scale transmission network has the advantage of being able to calculate the occurrence, type, and duration of a simple failure only with limited information collected by the EMS, without directly interoperating with a very large number of transmission equipment manufactured by various manufacturers.

According to the present invention, since the occurrence, type, and duration of a simple failure are calculated using only the minimum value, maximum value, and average value of the optical signal reception intensity collected at regular intervals, data throughput is drastically reduced, and accordingly, there is an advantage in that cost/manpower/time for detecting a simple failure can be drastically reduced.

1 is a diagram for explaining a simple failure prediction system of a transmission network according to the present invention.
2 is a block diagram for explaining an apparatus for predicting a simple failure of a transmission network according to the present invention.
3 is a diagram for explaining an operating method of an apparatus for predicting a simple failure of a transmission network according to the present invention.
4 is a flowchart for explaining a method for determining whether a simple disorder occurs and a type of a simple disorder according to the present invention.
5 is a diagram for explaining a method for calculating the duration of a simple disorder according to the present invention.

Hereinafter, the embodiments disclosed in this specification will be described in detail with reference to the accompanying drawings, but the same or similar elements are given the same reference numerals regardless of reference numerals, and redundant description thereof will be omitted. The suffixes "module" and "unit" for components used in the following description are given or used together in consideration of ease of writing the specification, and do not have meanings or roles that are distinct from each other by themselves. In addition, in describing the embodiments disclosed in this specification, if it is determined that a detailed description of a related known technology may obscure the gist of the embodiment disclosed in this specification, the detailed description thereof will be omitted. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed in this specification, and the technical idea disclosed in this specification is not limited by the accompanying drawings, and all changes included in the spirit and technical scope of the present invention It should be understood to include equivalents or substitutes.

Terms including ordinal numbers, such as first and second, may be used to describe various components, but the components are not limited by the terms. These terms are only used for the purpose of distinguishing one component from another.

It should be understood that when an element is referred to as being “connected” or “connected” to another element, it may be directly connected or connected to the other element, but other elements may exist in the middle. On the other hand, when an element is referred to as “directly connected” or “directly connected” to another element, it should be understood that no other element exists in the middle.

Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "comprise" or "have" are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, but it should be understood that the presence or addition of one or more other features or numbers, steps, operations, components, parts, or combinations thereof is not excluded in advance.

In implementing the present invention, components may be subdivided for convenience of explanation, but these components may be implemented in one device or module, or one component may be implemented by being divided into multiple devices or modules.

1 is a diagram for explaining a simple failure prediction system of a transmission network according to the present invention.

The system for predicting short-term failure of a transmission network according to the present invention may include a device 100 for predicting short-term failure of a transmission network (hereinafter referred to as device 100), a transmission network 200, one or more communication network equipment management systems (Element Management System, EMS) 300 (hereinafter referred to as EMS 300) and a transmission network facility database 400.

The transport network 200 is a communication network that transmits voice and data in the largest scale, and may include an existing Public Switched Telephone Network (PSTN), a Public Switched Data Network (PSDN), and an Integrated Services Digital Network (ISDN). The transport network 200 may include a plurality of network elements (NEs), and a plurality of network elements may be connected in a topology such as a ring, point-to-point, star, and mesh, or may be formed by applying them. Here, the network equipment may include transmission equipment 210 that receives and transmits voice and data within the transmission network 200 .

Various terminals are connected through the connection point of the transmission network 200, and the terminals can transmit/receive voice and data through the transmission network 200. In this case, voice and data may be transmitted through one or more transmission devices 210 in the transmission network 200, a line between connection points and transmission devices, and a line between transmission devices.

In addition, the transmission network 200 may further include an optical transmission device that converts voice or data into an optical signal and transmits it, a multiplexing device that multiplexes low-speed lines into high-speed lines and demultiplexes high-speed lines into low-speed lines, a digital circuit switching device that accepts asynchronous and synchronous digital signals of various levels and interconnects lines under automatic control, and a wavelength division transmission device that transmits a large-capacity signal through one optical fiber by bundling various different wavelengths. Therefore, an optical signal can travel through one or more transmission devices 210 and multiple lines in the transmission network 200 .

Meanwhile, the transmission device 210 may receive an optical signal transmitted from another transmission device and transmit the optical signal to another transmission device. In the case of transmitting an optical signal, the transmission equipment 210 may set and transmit the transmission intensity of the optical signal so that the transmission equipment at the reception side can receive the optical signal with an intensity equal to or greater than a predetermined value. The transmission strength of an optical signal may be determined by considering various factors such as a distance between transmission devices, a connection structure or state between transmission devices, and performance of transmission devices.

Meanwhile, each transmission device 210 in the transmission network 200 may measure the received strength of the optical signal and transmit the received strength information of the generated optical signal to the EMS 300 using the measured value.

Specifically, when an optical signal is received from other transmission equipment, the transmission equipment 210 may measure the reception strength of the optical signal in real time. In addition, each transmission equipment 210 in the transmission network 200 may calculate the minimum value, maximum value, and average value of the received intensity of the optical signal within a period at each predetermined period. Also, the transmission device 210 may transmit, to the EMS 300, reception strength information including the minimum value, maximum value, and average value of reception strength within one period at regular intervals.

Assume, for example, that one cycle is 15 minutes. In this case, the transmission equipment 210 may measure the reception strength of the optical signal received from 00:00 to 00:15, and calculate the minimum value, maximum value, and average value of the reception strength from 00:00 to 00:15. And when 00:15 passes, the transmission equipment 210 may transmit reception strength information including the minimum value, maximum value, and average value of the reception strength of the optical signal to the EMS 300 connected thereto. Next, the transmission equipment 210 may measure the reception strength of the optical signal received from 00:15 to 00:30, and calculate the minimum value, maximum value, and average value of the reception strength from 00:15 to 00:30. When 00:30 has elapsed, the transmission equipment 210 may transmit reception strength information including the minimum value, maximum value, and average value of the reception strength of the optical signal to the EMS 300 connected thereto.

In addition, the reception strength information may further include identification information of transmission equipment transmitting the reception strength information.

Meanwhile, the transmission equipment 210 may determine a transmission period of the reception strength information and determine the type of information included in the reception strength information according to a preset EMS standard. For example, in a typical standard of EMS, the time period for EMS 300 to collect data from transmitting equipment 210 is 15 minutes. In this case, the transmission equipment 210 may transmit reception strength information every 15 minutes. In addition, in the standard of EMS, transmission equipment is specified to report the maximum value, minimum value, and average value of reception strength of an optical signal within one period. In this case, the transmission equipment 210 may transmit reception strength information including maximum, minimum, and average optical signal strength to the EMS 300 .

In addition, each transmission device 210 in the transmission network 200 may calculate the minimum value, maximum value, and average value of the transmission intensity of the optical signal within the period for each predetermined period. Also, the transmission equipment 210 may transmit transmission strength information including the minimum value, maximum value, and average value of transmission strength within one period to the EMS 300 at regular intervals. Therefore, the description of reception strength information described below can also be applied to transmission strength information.

Each EMS 300 can communicate with one or more transmission devices and transmit/receive data.

Meanwhile, each EMS 300 may be a system provided by an equipment vendor that develops and manufactures transmission equipment for the convenience of equipment management of customers who use their own transmission equipment. Accordingly, each EMS 300 can transmit/receive data by being connected to transmission equipment supplied by the same vendor as itself.

In addition, the EMS 300 may collect reception strength information including the minimum value, maximum value, and average value of the reception strength of an optical signal within a period from the transmission equipment 200 at regular intervals.

In addition, the EMS 300 may transmit the reception strength information of one or more transmission devices collected by the EMS 300 to the device 100 at regular intervals.

In addition, the plurality of EMSs 300 constituting the system for predicting a simple failure of a transmission network may operate according to the same EMS standard. Accordingly, each of the plurality of EMSs 300 may receive reception strength information at the same period from the transmission equipment connected thereto, and the received reception strength information may include a minimum value, a maximum value, and an average value of the reception strength of the optical signal.

The device 100 may be a device operated by an operator of the transmission network 200 .

The device 100 may communicate with one or more EMSs 300 and receive reception strength information of the transmission equipment 210 from the one or more EMSs 300 . In addition, the apparatus 100 may calculate whether a simple failure occurs in a line, a type of a simple failure, and a duration of a simple failure in a line by using the reception strength information of the transmission equipment 210 received from the EMS 300.

The transport network facility database 400 may store transport network information including information on a plurality of network elements (NEs) constituting the transport network 200, lines, and their connection structure. Also, the device 100 may receive transmission network information from the transmission network facility database 400 .

2 is a block diagram for explaining an apparatus for predicting a simple failure of a transmission network according to the present invention.

The device 100 may include a communication unit 110 , a controller 120 , a storage 130 and an output unit 140 .

The communication unit 110 may provide a communication interface for communication with one or more EMSs 300 . In this case, the communication unit 110 may transmit and receive data with one or more EMSs 300 under the control of the control unit 120 .

Also, under the control of the control unit 120, the communication unit 110 may transmit at least one of whether a simple failure occurs, a type of the simple failure, and a duration of the simple failure to an external device.

The controller 120 is composed of one or more processors and may control overall operations of the device 100 .

The control unit 120 includes a preprocessing module 121 that preprocesses information received from the EMS and extracts reception strength information, a simple failure determination module 122 that calculates at least one of the occurrence of a simple failure, the type of a simple failure, and the duration of a simple failure using the reception strength information, and the simple failure determination module 122. Using the determination result of the simple failure determination module 122 and transmission network information, whether or not a simple failure has occurred, a line in which the simple failure occurred, the type of the simple failure, and the duration of the simple failure It is possible to create a result output module 123 that generates visual data for at least one of the times.

The storage 130 may store programs or other instructions for operating the device 100 . In addition, the storage 130 may include a reception strength information integrated database 131 in which reception strength information received from one or more EMSs 300 is stored. The term “storage 130” may be used interchangeably with the term “memory 130”.

The output unit 140 may output data processed by the device 100 . For example, the output unit 140 may include a display module and display identification information or location of a line where the simple failure occurs, the type of the simple failure, and the duration of the simple failure.

3 is a diagram for explaining an operating method of an apparatus for predicting a simple failure of a transmission network according to the present invention.

The operation method of the device for predicting a brief failure of a transmission network may include obtaining optical signal reception strength information collected by an EMS from at least one transmission equipment in a transmission network (S310), determining whether a brief failure occurs in a line using the optical signal reception strength information (S320), and calculating a duration of the brief failure using the optical signal reception strength information (S330).

First, in relation to S310, the control unit 120 may obtain optical signal reception strength information collected by the EMS from one or more transmission devices in the transmission network.

Specifically, each transmission device 210 may transmit optical signal reception strength information to the EMS 300 according to the EMS standard. Accordingly, each transmission device 210 may transmit, to the EMS 300, information on the reception strength including the minimum value, maximum value, and average value of the reception strength of the optical signal at regular intervals.

Therefore, each EMS 300 can collect optical signal reception strength information from one or more transmission equipment 210 connected thereto at regular intervals. In addition, each EMS 300 may transmit reception strength information to the device 100 at regular intervals. Accordingly, the reception strength information received by the device 100 is collected at regular intervals according to the EMS standard, and may include a minimum value, a maximum value, and an average value of the optical signal reception strength.

Next, the control unit 120 may determine whether or not a momentary failure occurs in the line using the optical signal reception strength information (S320). This will be described with reference to FIG. 4 .

4 is a flowchart for explaining a method for determining whether a simple disorder occurs and a type of a simple disorder according to the present invention.

Hereinafter, a method of determining whether a simple failure occurs and the type of a simple failure using the reception strength information transmitted from the first transmission equipment will be described. However, the description of the first transmission device may also be applied to other transmission devices.

The minimum value of the optical signal reception strength among the values included in the optical signal reception strength information may be used to determine whether or not a simple failure occurs.

The control unit 120 may determine whether or not a transient failure occurs according to the degree to which the minimum value of the optical signal reception intensity is reduced compared to the normal value. Here, the normal value may mean the intensity of an optical signal received by the transmission equipment under normal conditions.

Specifically, the second transmission device that transmits the optical signal to the first transmission device may set and transmit the transmission intensity of the optical signal so that the first transmission device can receive the optical signal with a normal value. Therefore, under normal conditions, the first transmission equipment receives an optical signal with a constant intensity, and the constant intensity may be referred to as a normal value.

However, if a simple failure occurs on the line through which the optical signal is transmitted to the first transmission equipment due to facility construction, facility damage, or other causes, the strength of the optical signal received by the first transmission equipment is momentarily (e.g., several seconds). Can be weakened. In addition, this short-term failure may appear as the minimum value of the optical signal reception strength.

Accordingly, the control unit 120 may calculate the degree to which the minimum value of the optical signal reception intensity is reduced compared to the normal value, for example, a value obtained by subtracting the minimum value of the optical signal reception intensity from the normal value (S321). For example, when the normal value is -15 dBm and the minimum value of the optical signal reception strength is -20 dBm, the controller 120 may calculate 5 dBm, which is a degree of decrease of the minimum value of the optical signal reception strength compared to the normal value.

In addition, the control unit 120 may compare the degree of decrease of the minimum value of the optical signal reception intensity compared to the normal value with a first threshold value to determine whether a transient failure occurs (S322). Specifically, when the degree of decrease of the minimum value of the optical signal reception intensity compared to the normal value is smaller than the first threshold value, the controller 120 may determine that a simple failure has not occurred. On the other hand, if the degree of decrease of the minimum value of the optical signal reception intensity compared to the normal value is equal to or greater than the first threshold value, the controller 120 may determine that a simple failure has occurred.

For example, when the normal value is -15 dBm, the minimum value of the optical signal reception strength is -17 dBm, and the first threshold is 3 dBm, the minimum value (-17 dBm) of the optical signal reception strength is the normal value (-15 dBm). The degree of decrease (2 dBm) is less than the first threshold (3 dBm). In this case, the control unit 120 determines the change in reception strength within a normal range from a normal value, and may determine that a simple failure does not occur.

On the other hand, when it is determined that a simple failure has occurred, the controller 120 may determine the type of a simple failure according to the degree to which the minimum value of the optical signal reception intensity is reduced compared to the normal value.

The minimum value of the optical signal reception strength among the values included in the information on the optical signal reception strength may be used to determine the type of transient failure.

Specifically, the control unit 120 may determine the type of transient failure according to the degree to which the minimum value of the optical signal reception intensity is reduced from the normal value. More specifically, the control unit 120 may compare the degree of decrease of the minimum value of the optical signal reception intensity compared to the normal value with the second threshold value (S323).

Here, the second threshold may be greater than the first threshold described above. For example, when the first threshold is 3 dBm, the second threshold may be 10 dBm.

In addition, when the degree of decrease of the minimum value of the optical signal reception strength compared to the normal value is smaller than the second threshold value, the controller 120 may determine that a first type failure has occurred. Here, the first type of disorder is of a lower severity than the second type of disorder described later, and may mean other types of disorders other than facility damage or facility construction failures, or damage to adjacent facilities or derived disorders due to adjacent facility construction.

Meanwhile, when the degree of decrease of the minimum value of the optical signal reception strength compared to the normal value is equal to or greater than the second threshold value, the controller 120 may determine that the currently occurring failure is a second type failure or a third type failure.

For example, the second threshold may be 10 dBm. In addition, the control unit 120 may determine that the currently occurring failure is a second type failure or a third type failure when the degree of decrease of the minimum value of the optical signal reception strength compared to the normal value is 10 dBm or more. On the other hand, if the degree of decrease of the minimum value of the optical signal reception strength compared to the normal value is less than 10 dBm, the controller 120 may determine that the current failure is the first type failure.

Meanwhile, the third threshold will be described. Here, the third threshold value may be an absolute value compared with only the minimum value, not a value compared with the degree of decrease of the minimum value of the optical signal reception intensity compared to the normal value.

Specifically, when a severe failure occurs due to an external factor to the extent that the line is disconnected or the line is artificially blocked, the optical signal reception strength drops to the minimum value that the optical signal reception strength can physically represent. Accordingly, the minimum value that can be physically represented by the optical signal reception strength may be set as the third threshold value.

Further, the control unit 120 may determine the type of simple failure according to a result of comparing the minimum value of the optical signal reception strength included in the optical signal reception strength information with a preset third threshold value. For example, the control unit 120 may determine the type of sequencing failure according to whether the minimum value of the optical signal reception strength included in the optical signal reception strength information is equal to a preset third threshold (S324).

That is, when the minimum value of the optical signal reception strength is equal to the third threshold value, the controller 120 may determine that the currently occurring failure is a third type failure. On the other hand, if the minimum value of the optical signal reception strength is different from the third threshold, the controller 120 may determine that the currently occurring failure is a second type failure.

For example, the third threshold may be -60 dBm. In addition, if the minimum value of the optical signal reception strength is -60 dBm, the controller 120 determines that the currently occurring obstacle is a third type disability, and if the minimum optical signal reception strength is greater than -60 dBm, the currently occurring obstacle is a second type of disability.

Here, the second type failure indicates a lower severity than the third type failure, and may mean a facility damage situation in which damage occurs due to unexpected causes such as external construction or natural disaster, but the line is not disconnected.

In addition, the third type of failure refers to a facility damage situation to the extent that a line is disconnected due to an unexpected cause such as external construction or natural disaster, or a facility construction situation in which a line is artificially blocked due to scheduled network management construction such as a circuit configuration change.

Meanwhile, the normal value described above is a value set by an operator operating the transmission network 200 . However, due to deterioration of transmission equipment or lines, the optical signal reception strength may be naturally attenuated even under a normal situation in which no failure occurs.

Specifically, the second transmission device that transmits the optical signal to the first transmission device sets the transmission intensity of the optical signal so that the first transmission device can receive the optical signal with a normal value. However, due to aging of the second transmission equipment or line, the strength of the optical signal received by the first transmission equipment may naturally decrease. However, even in this case, if the occurrence and type of pure failure are determined based on the initially set normal value, problems with accuracy may occur.

In addition, when a simple failure occurs, the optical signal reception strength does not increase even though there are cases where the optical signal reception strength decreases. Therefore, the maximum value of the optical signal reception strength within one period may mean the strength of a normal reception signal that the first transmission equipment can receive in the current state (ie, in a state in which aging is reflected).

For example, the initially set normal value was -15 dBm, but due to aging, the optical signal is transmitted to the first transmission equipment with an intensity as low as 1 dBm even under normal circumstances. In this case, -16 dBm may be the strength of a normal received signal that the first transmission equipment can receive in the current state.

Therefore, the maximum value of the optical signal reception intensity together with the minimum value of the optical signal reception intensity may be used to determine whether or not the transient failure occurs and the type. Specifically, the control unit 120 may set the maximum value included in the optical signal reception strength information to the normal value described above. In addition, the control unit 120 may calculate the degree of decrease of the minimum value of the optical signal reception intensity compared to the maximum value.

In addition, the control unit 120 may determine whether or not a simple failure occurs and the type of the simple failure according to the degree to which the minimum value of the optical signal reception intensity is reduced from the maximum value.

For example, when the maximum value of the optical signal reception strength is -16 dBm and the minimum value of the optical signal reception strength is -20 dBm, the controller 120 may calculate 4 dBm by subtracting the minimum value of the optical signal reception strength from the maximum value of the optical signal reception strength. In addition, the controller 120 may compare 4 dBm with the first threshold and the second threshold to determine whether and the type of simple disturbance occurs.

Next, the control unit 120 may calculate the duration of the transient failure using the optical signal reception strength information (S330). This will be described with reference to FIG. 5 .

5 is a diagram for explaining a method for calculating the duration of a simple disorder according to the present invention.

5A shows a situation in which a simple failure occurs. That is, when one period (P) starts, the optical signal reception strength shows the maximum value (S _MAX ) in normal circumstances, but a brief failure occurs in the middle, and the optical signal reception strength shows the minimum value (S _MIN ). Then, the brief failure is resolved and the optical signal reception strength shows the maximum value (S _MAX ) again.

The duration of the simple failure is defined as the time (t) in which the light signal reception strength exhibits the minimum value (S _MIN ), and therefore, the apparatus 100 must calculate the time (t) in which the optical signal reception strength exhibits the minimum value (S _MIN ).

However, the optical signal reception strength information received from the EMS 200 only includes the minimum value, the maximum value, and the average value within one period, and does not include information about the time and length of time at which the optical signal reception strength value appears. For example, the optical signal reception strength information includes only the absolute value of the maximum value (S _MAX ), at what point the maximum value (S _MAX ) started and how many seconds the maximum value (S _MAX ) lasted. It does not include information. For another example, the light signal reception strength information includes only the absolute value of the minimum value (S _MIN ), and does not include information about when the minimum value (S _MIN ) started and how many seconds the minimum value (S _MIN ) lasted.

Meanwhile, the apparatus 100 is in a state of knowing the minimum value, the maximum value, and the average value of the optical signal reception strength within one current period by receiving the optical signal reception strength information from the EMS. In addition, since the light signal reception strength information is received at regular intervals, the device 100 knows the length of the cycle.

Accordingly, the control unit 120 may calculate the duration of the transient failure using the minimum value, the maximum value, and the average value of the optical signal reception strength within one cycle, and the length of the cycle.

Specifically, the length of time (t) at which the minimum value (S _MIN ) appears is the duration (t) of the simple disorder. In this case, the product of the minimum value (S _MIN ) and the duration (t) represents the area (S3) of the minimum value graph.

In addition, the length of time (a1+a2) in which the maximum value (S _MAX ) appears is defined as the non-duration time. In this case, the product of the maximum value (S _MAX ) and the non-duration time (a1+a2) represents the area (S1+S2) of the maximum value (S _MAX ) graph.

In addition, since the minimum value (S _MIN ) and the maximum value (S _MAX ) are values within one period, the sum of the non-duration time (a1+a2) and the duration (t) is equal to the length (P) of the period. Therefore, the duration (a1+a2) is the value obtained by subtracting the duration (t) from the length (P) of the period.

Meanwhile, referring to FIG. 5B , the average value SAVG is an average value of optical signal reception strength values within one period. Therefore, the sum of the area (S1+S2) of the maximum value graph of FIG. 5A and the area (S3) of the minimum value graph should be equal to the area ( _S4 ) of the average value graph of FIG.

Accordingly, the control unit 120 may calculate the duration of the simple failure using the following formula.

(S _MIN : Minimum value, S _MAX : Maximum value, S _AVG : Average value, t: Simple failure duration, P: Length of cycle)

That is, in a state in which the minimum value, the maximum value, and the average value of the optical signal reception strength within one period are known, the control unit 120 can calculate the duration of the brief failure by using the fact that the product of the average value and the length of the period is equal to the sum of the 'product of the minimum value and the duration' and the 'product of the maximum value and the non-duration time'.

On the other hand, if it is determined that a simple failure has occurred, the control unit 120 can determine a line in which a simple failure has occurred. Specifically, when it is determined that a simple failure has occurred through the optical signal reception strength information collected from the first transmission equipment, the controller 120 can determine that a simple failure has occurred on a line through which the first transmission equipment receives the optical signal. In addition, the control unit 120 may obtain information on a time interval (cycle) in which a simple failure occurs by using information on a time when optical signal reception strength information is collected.

In this case, the control unit 120 may display the location or identification information of the corresponding line, the type of simple failure, the duration of the simple failure, and the time interval in which the simple failure occurred.

In addition, the control unit 120 may issue a slip including the location or identification information of the line where the simple failure occurred, the type of the simple failure, the duration of the simple failure, and the time interval in which the simple failure occurred, and transmit it to the operator of the transmission network.

As described above, according to the present invention, an operator operating a large-scale transmission network has the advantage of being able to calculate the occurrence, type, and duration of a simple failure only with limited information collected by the EMS, without directly interoperating with a very large number of transmission equipment manufactured by various manufacturers.

In addition, according to the present invention, since the occurrence, type, and duration of a simple failure are calculated using only the minimum value, maximum value, and average value of the optical signal receiving intensity collected at regular intervals, data throughput is drastically reduced, and accordingly, there is an advantage in that cost/manpower/time for detecting the simple failure can be drastically reduced.

In addition, according to the present invention, when the optical signal reception strength information of one cycle is collected, it can be known in a very short amount of time that a simple failure has occurred within the corresponding cycle. For example, if one period is 15 minutes, the operator of the transmission network can recognize that a simple failure has occurred within a maximum of 15 minutes. Therefore, there is an advantage in taking preemptive measures before the customer's VoC is received.

In addition, according to the present invention, by automating the process of detecting whether or not the simple failure occurs, the line where the simple failure occurs, the type and duration of the failure, there is an advantage in that manpower for detecting the simple failure can be drastically reduced.

The above-described present invention can be implemented as computer readable code on a medium on which a program is recorded. The computer-readable medium includes all types of recording devices in which data that can be read by a computer system is stored. Examples of computer-readable media include hard disk drives (HDDs), solid state disks (SSDs), silicon disk drives (SDDs), ROMs, RAMs, CD-ROMs, magnetic tapes, floppy disks, optical data storage devices, and the like. Also, the computer may include a control unit. Accordingly, the above detailed description should not be construed as limiting in all respects and should be considered as illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention.

Claims (18)

Acquiring, by the EMS, optical signal reception strength information collected from one or more transmission devices in a transmission network;
determining whether or not a short-circuit failure occurs in a line using the optical signal reception strength information; and
Calculating a duration of the simple disturbance using the optical signal reception strength information;
The optical signal reception strength information,
In accordance with the EMS standard, it is collected at regular intervals, and includes the minimum value, maximum value and average value of the optical signal reception strength within one cycle.
A method of operating an apparatus for predicting short-term failure of a transmission network. According to claim 1,
The step of determining whether the pure disorder occurs,
Determining whether or not the transient failure occurs according to the degree to which the minimum value of the optical signal reception intensity is reduced compared to the normal value;
A method of operating an apparatus for predicting short-term failure of a transmission network. According to claim 2,
The step of determining whether the pure disorder occurs,
When it is determined that the simple failure has occurred, determining the type of the simple failure according to the degree to which the minimum value of the optical signal reception intensity is reduced from a normal value;
A method of operating an apparatus for predicting short-term failure of a transmission network. According to claim 2,
The step of determining whether the pure disorder occurs,
Determining the type of the transient failure according to a result of comparing the minimum value of the optical signal reception strength with a preset threshold value;
A method of operating an apparatus for predicting short-term failure of a transmission network. According to claim 2,
The step of determining the type of pure disorder is,
Setting the maximum value included in the optical signal reception strength information as the normal value, and calculating the degree to which the minimum value of the optical signal reception strength is reduced compared to the maximum value
A method of operating an apparatus for predicting short-term failure of a transmission network. According to claim 1,
The step of calculating the duration of the pure disorder is,
Calculating the duration of the transient failure using the minimum value, maximum value, and average value of the optical signal reception strength within the one period, and the length of the period
A method of operating an apparatus for predicting short-term failure of a transmission network. According to claim 6,
The product of the average value and the length of the period is
equal to the sum of 'the product of the minimum value and the duration' and 'the product of the maximum value and the non-duration'
A method of operating an apparatus for predicting short-term failure of a transmission network. According to claim 7,
The US duration is,
is the value of subtracting the duration from the length of the period
A method of operating an apparatus for predicting short-term failure of a transmission network. According to claim 7,
The optical signal reception strength information,
It does not contain information about the time and length of time at which the value of the optical signal reception strength was displayed.
A method of operating an apparatus for predicting short-term failure of a transmission network. a communication unit for acquiring optical signal reception strength information collected by the EMS from one or more transmission devices in a transmission network; and
A control unit for determining whether or not a transient failure occurs in a line using the optical signal reception strength information and calculating a duration of the transient failure using the optical signal reception strength information,
The optical signal reception strength information,
In accordance with the EMS standard, it is collected at regular intervals, and includes the minimum value, maximum value and average value of the optical signal reception strength within one cycle.
System for predicting net failure of transmission network. According to claim 10,
The control unit,
Determining whether or not the transient failure occurs according to the degree to which the minimum value of the optical signal reception intensity is reduced compared to the normal value
System for predicting net failure of transmission network. According to claim 11,
The control unit,
When it is determined that the simple failure has occurred, determining the type of the simple failure according to the degree to which the minimum value of the optical signal reception intensity is reduced from the normal value
System for predicting net failure of transmission network. According to claim 11,
The control unit,
Determining the type of the net failure according to the result of comparing the minimum value of the optical signal reception strength with a preset threshold value
System for predicting net failure of transmission network. According to claim 11,
The control unit,
Setting the maximum value included in the optical signal reception strength information as the normal value, and calculating the degree to which the minimum value of the optical signal reception strength is reduced compared to the maximum value
System for predicting net failure of transmission network. According to claim 10,
The control unit,
Calculating the duration of the transient failure using the minimum value, maximum value, and average value of the optical signal reception strength within the one period, and the length of the period
System for predicting net failure of transmission network. According to claim 15,
The product of the average value and the length of the period is
equal to the sum of 'the product of the minimum value and the duration' and 'the product of the maximum value and the non-duration'
System for predicting net failure of transmission network. According to claim 16,
The US duration is,
is the value of subtracting the duration from the length of the period
System for predicting net failure of transmission network. According to claim 16,
The optical signal reception strength information,
It does not contain information about the time and length of time at which the value of the optical signal reception strength was displayed.
System for predicting net failure of transmission network.

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