KR102151341B1 - Analysis server and operating method of analysis server - Google Patents

Abstract

A quality report transmitted from at least one mobile IoT terminal is collected, a call history record is generated based on the quality report, and at least one of the wireless network and the mobile IoT terminal to which the mobile IoT terminal belongs is defective through the call history record. It is possible to provide an analysis server that analyzes whether it exists and outputs a control signal based on the analysis result, and an operation method of the analysis server.

Description

Analysis server and operation method of analysis server {ANALYSIS SERVER AND OPERATING METHOD OF ANALYSIS SERVER}

The present invention relates to an analysis server and a method of operating the analysis server.

Minimization of drive tests (MDT) allows operators to use their equipment to collect wireless measurements and related location information to evaluate network performance and reduce the operational expenditure (OPEX) associated with conventional drive tests. This is a feature of 3GPP Release 10 that can be used. However, Minimization of Drive Test (MDT) does not support the Narrow Band-Internet of Things (NB-IoT) field, and in addition to basic information related to wireless communication, additional information such as battery information is also collected. Cannot provide. Accordingly, there is a need for a method capable of collecting communication quality and additional information of a terminal in the narrowband IoT field.

According to an embodiment, a transmission standard capable of transmitting quality information of a terminal in a narrow band-internet of things (NB-IoT) regardless of a communication protocol of the terminal may be provided.

According to an embodiment, through transmission of a quality report of a terminal, for example, a field of personnel for measuring wireless signals in a place that is difficult to access due to the nature of a mobile Internet of Things (IoT) environment, such as inside a manhole. Movement can be minimized.

According to an embodiment, it is possible to provide an automatic analysis system that automatically analyzes a quality report of a terminal to perform customer experience management (CEM).

According to an embodiment, it is possible to improve analysis accuracy compared to statistical analysis by automatically analyzing a cause of a defect based on a quality report transmitted from a terminal.

According to an embodiment, a method of operating an analysis server includes: collecting a quality report transmitted from at least one mobile Internet of Things (IoT) terminal; Generating a call detail recording (CDR) based on the quality report; Analyzing whether or not there is a defect in at least one of the wireless network to which the mobile IoT terminal belongs and the mobile IoT terminal through the call history record; And outputting a control signal based on the analysis result.

The quality report may include at least one of battery information of the mobile IoT terminal and quality information of a wireless network to which the mobile IoT terminal belongs.

The quality report includes a standard version of the quality report, a phone number of the mobile IoT terminal, information on a battery of the mobile IoT terminal, a serving cell ID of the mobile IoT terminal, and a received signal strength of the mobile IoT terminal. Indicator; RSSI), model information of the mobile IoT terminal, model version information of the mobile IoT terminal, transmission power level of the mobile IoT terminal, GPS location information of the mobile IoT terminal, and signal strength around the mobile IoT terminal It may include at least one field item among identification information of three higher cells.

The quality report may be transmitted by a user datagram protocol (UDP).

The mobile IoT terminal may transmit the quality report according to a transmission period preset for each type of the mobile IoT terminal.

The generating the call history record may include generating the call history record by applying a preset parsing rule to the quality report.

The analyzing may include determining whether a battery defect of the mobile IoT terminal exists based on battery information of the mobile IoT terminal included in the call history record.

The determining whether the battery defect exists may include determining whether the battery defect exists based on whether the remaining battery capacity of the mobile IoT terminal is smaller than a preset reference capacity; And determining whether the battery defect exists based on whether the measured value of the battery voltage of the mobile IoT terminal is less than a threshold value of a preset reference voltage.

Outputting the control signal may include outputting a control signal to replace the battery of the mobile IoT terminal when it is determined that the battery defect exists.

The analyzing step includes determining whether there is a defect in the quality of the wireless network based on whether the received signal strength of the mobile IoT terminal included in the call history record is lower than a preset threshold. I can.

The method of operating the analysis server may further include determining whether the type of the mobile IoT terminal is a mobile type or a fixed type when it is determined that there is a defect in the quality of the wireless network.

When it is determined that the type of the mobile IoT terminal is mobile, the outputting of the control signal is based on a reception level of a reference signal of neighboring cells adjacent to the serving cell of the mobile IoT terminal among a plurality of cells of the wireless network. , Selecting any one candidate cell; And outputting a control signal for replacing the serving cell of the mobile IoT terminal with the candidate cell.

In the outputting of the control signal, when it is determined that the type of the mobile IoT terminal is a fixed type, the cell to which the at least one IoT terminal is connected in the wireless network-the wireless network includes a plurality of cells-is a main cell. determining whether it is a (main cell); And when the cell to which the at least one IoT terminal is connected is determined to be the main cell, the at least one IoT terminal can receive a signal from the main cell. It may include the step of outputting a control signal for adjusting the transmission.

The analyzing may include determining whether a defect exists in the mobile IoT terminal based on the number of transmissions of the quality report.

The outputting of the control signal may include outputting a control signal instructing to replace the mobile IoT terminal when it is determined that a defect exists in the mobile IoT terminal.

The mobile IoT terminal may include a terminal that performs communication based on a Narrow Band-Internet of Things (NB-IoT).

According to an embodiment, the analysis server includes a communication interface for receiving a quality report from at least one mobile IoT terminal; And generating a call history record based on the quality report, and analyzing whether a defect exists in at least one of the wireless network to which the mobile IoT terminal belongs and the mobile IoT terminal through the call history record, and the analysis result It includes a processor that outputs a control signal based on.

The processor determines whether a battery defect of the mobile IoT terminal exists based on the battery information of the mobile IoT terminal included in the call history record, and when it is determined that the battery defect exists, the mobile IoT terminal It can output a control signal to replace the battery.

Based on whether the received signal strength of the mobile IoT terminal included in the call history record is lower than a preset threshold, the processor determines whether there is a defect in the quality of the wireless network, or the quality report Based on the number of transmissions, it may be determined whether a defect exists in the mobile IoT terminal.

According to one side, a standard for transmitting quality information of a terminal in a narrow-band Internet of Things (NB-IoT) regardless of a communication protocol of the terminal may be provided.

According to one side, personnel dispatch on-site to measure wireless signals in places that are difficult to access due to the nature of a mobile Internet of Things (IoT) environment, such as inside a manhole, through transmission of a quality report of a terminal. Can be minimized.

According to one side, it is possible to provide an automatic analysis system that automatically analyzes a quality report of a terminal to perform customer experience management (CEM).

According to one side, it is possible to improve analysis accuracy compared to statistical analysis by automatically analyzing the cause of a defect based on a quality report transmitted from the terminal.

1 is a diagram showing the configuration of an analysis system according to an embodiment.
2 is a flowchart illustrating a method of operating an analysis server according to an embodiment.
3 is a diagram illustrating a transmission standard of a quality report according to an embodiment.
4 is a diagram illustrating a transmission period of a quality report according to an embodiment.
5 is a diagram for describing an analysis method of an analysis server according to an embodiment.
6 is a diagram illustrating an analysis result output from an analysis server and a control signal output based on the analysis result according to an exemplary embodiment.
7 is a block diagram of an analysis server according to an embodiment.

Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings. The same reference numerals in each drawing indicate the same members.

Various changes may be made to the embodiments described below. The embodiments described below are not intended to be limited to the embodiments, and should be understood to include all changes, equivalents, and substitutes thereto.

The terms used in the examples are used only to describe specific embodiments, and are not intended to limit the embodiments. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present specification, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the embodiment belongs. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this application. Does not.

In addition, in the description with reference to the accompanying drawings, the same reference numerals are assigned to the same components regardless of the reference numerals, and redundant descriptions thereof will be omitted. In describing the embodiments, when it is determined that a detailed description of related known technologies may unnecessarily obscure the subject matter of the embodiments, the detailed description thereof will be omitted.

1 is a diagram illustrating a configuration diagram of an analysis system according to an embodiment. Referring to FIG. 1, the analysis system 100 includes a terminal 110, C-SGN 120, ToR_SW 130, PA_SW 140, analysis server 150, IoT platform 160, and service server 170. ) Can be included.

The terminal 110 is a device that communicates based on an LTE network and, for example, communicates based on a new standard such as Narrow Band-Internet of Things (NB-IoT) or LTE Cat.M1. It may be a mobile IoT terminal that performs. The terminal 110 may be, for example, a commercial terminal such as a terminal that performs gas ambient intelligence (AMI), a power AMI, or a terminal dedicated to network measurement.

The terminal 110 may transmit, for example, a service packet 101 including service data and/or a quality User Datagram Protocol (UDP) packet 103 including a quality index. The service packet 101 may be transmitted through, for example, a Constrained Application Protocol (CoAP). CoAP is a lightweight message transmission protocol based on REST (REpresentational State Transfer) developed by optimizing for communication environments with limited bandwidth such as M2M (Machine to Machine) and Internet of Things (IoT). to be. CoAP can be based on a lightweight REST architecture that is used in small devices with resource constraints such as memory capacity, computing power, and battery, such as a sensor node or a control node. . The REST architecture may support functions such as resource discovery, multicast, and asynchronous processing request and response. If the message size is small, CoAP can be easily converted and linked with the existing HTTP web protocol. The service packet 101 transmitted by the terminal 110 may be delivered to the service server 170 through the ToR_SW 130, PA_SW 140, and IoT platform 160.

The quality UDP packet 103 may be transmitted by, for example, User Datagram Protocol (UDP). User Datagram Protocol (UDP) is a communication protocol in which one side sends information unilaterally, rather than a format that exchanges information on the Internet. User Datagram Protocol (UDP) is less reliable than TCP (Transmission Control Protocol), but it is much faster. The quality UDP packet 103 may also be referred to as a'quality report'. The quality UDP packet 103 transmitted by the terminal 110 may be transmitted to the analysis server 150 through the ToR_SW 130.

The C-SGN (Cellular IoT Service Gate Node) 120 is an NB-IoT dedicated switch device that performs the same role as the switch (EPC) of the existing LTE core network. The C-SGN 120 can separate the LTE network and the NB-IoT network separately from the core network. The Internet of Things (IoT) refers to information and communication infrastructure and services in which all things are connected to the Internet and communicate directly with each other. The Internet of Things (IoT) can be broadly divided into cellular mobile communication-based IoT (CIoT) and non-cellular-based IoT. In one embodiment, an analysis server targeting a cellular mobile communication-based IoT (CIoT) and a method of operating the analysis server will be described.

The analysis server 150 may generate a call detail recording (CDR) by collecting the quality UDP packet 103 (ie, a quality report) transmitted from the terminal 110. In this case, the call history record (CDR) may correspond to collecting and recording call history data for a specific extension number or a subscriber group for a phone service, for example. Analysis server 150 is a defect of the wireless network to which the terminal 110 belongs (eg, NB-IoT or LTE Cat.M1, etc.) and/or a defect of the terminal 110 itself or the terminal 110 through the call history record. ), you can analyze whether there is a fault in the battery. The analysis server 150 may output an analysis result and/or a control signal based on the analysis result.

The analysis server 150 may include, for example, an LTE Quality Management System (LQMS) collector 151, an LQMS analyzer 153, and an Energy Storage System (ESS) 155.

The LQMS collector 151 may generate a call history record (CDR) by collecting the quality UDP packet 103 transmitted from the terminal 110. At this time, the collected quality UDP packet 103 may be collected through'packet mirroring' in which a copy of the quality UDP packet 103 is created and monitored.

LQMS analyzer 153 is a defect of the wireless network to which the terminal 110 belongs (eg, NB-IoT or LTE Cat.M1), a defect of the terminal 110 itself, and/or the terminal 110 through the call history recording. ), it is possible to analyze whether or not there is a defect in the battery. The analysis server 150 may output an analysis result and/or a control signal based on the analysis result to the ESS 155.

The ESS 155 may be installed and operated in power generation, transmission and distribution, and customers in the power system. The ESS 155 may be used for functions such as frequency regulation, output stabilization of a renewable generator, peak shaving, load leveling, emergency power, and the like. The ESS 155 can improve energy use efficiency by storing electric energy when less electric energy is used and supplying it when necessary. The ESS 155 may adjust signal transmission power to the terminal 110 and/or other devices according to a control signal output through the LQMS analyzer 153.

The operation of the analysis server 150, more specifically the LQMS analyzer 153, will be described in detail with reference to FIG. 2 below.

The IoT platform 160 may be a platform that provides various functions to facilitate IoT service activities. The IoT platform 160 may be understood as a collective term, for example, a computer program, a mobile app, a website, etc. operated to provide an IoT service.

The service server 170 may provide a service requested by the service packet 101 transmitted through the IoT platform 160.

2 is a flowchart illustrating a method of operating an analysis server according to an embodiment. Referring to FIG. 2, the analysis server according to an embodiment collects a quality report transmitted from at least one mobile Internet of Things (IoT) terminal (210). The quality report includes, for example, battery information of the mobile IoT terminal (remaining battery capacity, etc.), quality information of the wireless network to which the mobile IoT terminal belongs (signal quality measurement value of the mobile IoT terminal, transmission power of the mobile IoT terminal (TX POWER), etc.). ) And other information (GPS information, main cell and/or neighboring cell information, etc.).

More specifically, the quality report includes, for example, the standard version of the quality report, the phone number of the mobile IoT terminal, information on the battery of the mobile IoT terminal, the serving cell ID of the mobile IoT terminal, and the received signal strength of the mobile IoT terminal (Received Signal Strength Indicator; RSSI), mobile IoT terminal model information, mobile IoT terminal model version information, mobile IoT terminal transmission power level, mobile IoT terminal GPS location information, and signal strength around the mobile IoT terminal Field items such as identification information of three cells may be included. The transmission standard of the quality report will be described in detail with reference to FIG. 3 below. The mobile IoT terminal according to an embodiment may transmit a quality report according to a preset transmission period for each type of mobile IoT terminal. The transmission period of the quality report will be described in detail with reference to FIG. 4 below.

The analysis server generates a call history (CDR) based on the quality report collected in step 210 (220). The analysis server may generate a call history record by applying a preset parsing rule to a quality report, for example.

The analysis server analyzes whether a defect exists in at least one of the wireless network and the mobile IoT terminal to which the mobile IoT terminal belongs through the call history record generated in step 220 (230). The analysis server may determine whether there is a battery defect of the mobile IoT terminal based on, for example, battery information of the mobile IoT terminal included in the quality report. Alternatively, the analysis server may compare the received signal strength of the mobile IoT terminal included in the quality report with a preset threshold, and determine whether there is a defect in the quality of the wireless network based on the comparison result. In addition, the analysis server may determine whether there is a defect in the mobile IoT terminal based on the number of transmissions of the quality report. For example, the analysis server may determine whether a defect exists in the mobile IoT terminal by comparing the number of transmissions according to a transmission period set in advance for each type of mobile IoT terminal and the number of transmissions of a quality report. A method by which the analysis server analyzes whether a defect exists in the wireless network and/or the mobile IoT terminal will be described in detail with reference to FIG. 5 below.

The analysis server outputs a control signal based on the analysis result of step 230 (240). For example, if it is determined that there is a battery defect in step 230, the analysis server may output a control signal to replace the battery of the mobile IoT terminal. Alternatively, if it is determined that the mobile IoT terminal has a defect in step 230, the analysis server may output a control signal instructing to replace the mobile IoT terminal. A control signal output based on the analysis result of the analysis server will be described in detail with reference to FIG. 6 below.

3 is a diagram illustrating a transmission standard of a quality report according to an embodiment. 3A, a transmission standard of a quality report according to an embodiment is shown. Referring to FIG. 3B, the fields of the quality report shown in FIG. 3A are An explanation is shown.

3A and 3B, a quality report according to an embodiment includes, for example, a standard version of a quality report (MSG Ver), a phone number (CTN) of a mobile IoT terminal, and a Battery information (BATTERY), mobile IoT terminal serving cell ID (ECGI), mobile IoT terminal received signal strength (RSSI), mobile IoT terminal model information (model name), and mobile IoT terminal model version information (firmware) Ver.), transmission power level of the mobile IoT terminal (Tx power), GPS location information of the mobile IoT terminal (location coordinates), and identification information of neighboring cells (Neighbor Cell ID) may include at least one field item. .

The standard version (MSG Ver) field indicates the standard version of the corresponding quality report, and '01' may be set as a current value (or default value).

The telephone number (CTN) field is a telephone number of a mobile IoT terminal, and may be expressed in a binary coded decimal (BCD) format, for example.

The battery information (BATTERY) field may include, for example, a detailed item of a battery indication unit of a corresponding terminal and a detailed item of a battery level of the terminal. The detailed item of the battery notation unit corresponds to, for example, %, V, phase, etc., and may be displayed as a fixed value such as (00, 01, 02). In addition, the detailed item of the battery level (Level) of the terminal indicates the level of the battery and may be expressed in the form of BCD (Binary Coded Decimal).

The serving cell ID (ECGI) field represents the ID of a serving cell that provides a communication service to a mobile IoT terminal. The serving cell ID (ECGI) may be expressed as a 28-bit HEX value, for example.

The received signal strength (RSSI) field includes, for example, a reference signal received power (RSRP) detail field of a mobile IoT terminal and a signal to interference plus noise ratio (SINR) detail of a mobile IoT terminal. May contain fields. The reference signal reception power (RSRP) detail field may indicate a reception level (dBm) of the reference signal reception power (RSRP). The signal-to-interference ratio (SINR) detail field may indicate a signal-to-interference ratio (dB) of a signal received by the mobile IoT terminal.

The model information (model name) field may indicate the model of the mobile IoT terminal, and the version information (firmware Ver.) field may indicate the version of the firmware of the corresponding model of the mobile IoT terminal.

The Tx power field may indicate the transmission power level of the mobile IoT terminal, and the GPS location coordinate field may indicate GPS location information of the mobile IoT terminal.

The neighboring cell identification information (Neighbor Cell ID) field may indicate identification information of three neighboring cells having a higher intensity of a signal (eg, a reference signal reception power (RSRP) signal) around the mobile IoT terminal.

In addition, referring to (c) of FIG. 3, an example of a transmission IP/UDP is shown.

4 is a diagram illustrating a transmission period of a quality report according to an embodiment. Referring to FIG. 4R, a table showing a transmission period of a preset quality report for each type of mobile IoT terminal according to an embodiment is shown.

In an embodiment, the types of mobile IoT terminals may be classified into, for example, a commercial terminal and a terminal dedicated to network measurement. In addition, a commercial terminal may be divided into a fixed type fixed in one place and a mobile type having mobility, without the corresponding terminal having mobility. For example, when the mobile IoT terminal is a fixed commercial terminal such as a terminal that performs gas ambient intelligence (AMI) or power AMI, the transmission period of the mobile IoT terminal may be, for example, 24 hours. Alternatively, when the mobile IoT terminal is a mobile commercial terminal, the transmission period of the mobile IoT terminal may be, for example, transmission once or more per day.

Alternatively, when the mobile IoT terminal is a dedicated network measurement terminal, the transmission period of the mobile IoT terminal may be, for example, 5 minutes.

5 is a diagram illustrating an analysis method of an analysis server according to an exemplary embodiment. Referring to FIG. 5, the analysis server according to an embodiment may generate a call history record (CDR) by collecting a quality report transmitted from a terminal (505 ). In this case, the call history record (CDR) may include one quality report transmitted from one terminal, or may include a plurality of quality reports transmitted from one or more terminals.

Based on the battery information of the mobile IoT terminal included in the call history record (CDR) (more specifically, the quality report included in the call history record), the analysis server determines whether there is a battery defect of the mobile IoT terminal, that is, It may be determined whether the battery is defective (510). A method of determining whether the battery is defective in step 510 is as follows. The analysis server determines whether there is a battery defect, for example, based on whether the remaining battery capacity (%) of the mobile IoT terminal included in the quality report is less than a preset reference capacity (eg, 10%). I can judge. Alternatively, the analysis server may determine whether a battery defect exists based on whether the battery voltage measurement value of the mobile IoT terminal included in the quality report is less than a preset reference voltage threshold (eg, 88%). have. For example, if a 3.6V battery is embedded in the mobile IoT terminal, and the battery voltage measured value of the mobile IoT terminal is less than 3.196, which is 88% of 3.6V, the analysis server determines that a battery defect of the mobile IoT terminal exists. can do.

If it is determined that a battery defect exists in step 510, the analysis server may output a control signal to replace the battery of the mobile IoT terminal (515). In contrast, when it is determined that there is no battery defect in step 510, the analysis server may determine whether or not there is a defect in the quality of the wireless network through whether the received signal strength of the mobile IoT terminal is defective.

When it is determined that the battery defect does not exist in step 510, the analysis server may determine whether the reception level RSRP of the reference signal is lower than a preset first threshold (that is, whether it is defective) (520). ). In step 520, if it is determined that the reception level (RSRP) of the reference signal is lower than the preset first threshold (the reception level of the reference signal (RSRP) is bad), the analysis server determines that the types of mobile IoT terminals are mobile and fixed. It is possible to determine whether it is any of.

If it is determined in step 520 that the reception level (RSRP) of the reference signal is lower than the preset first threshold, the analysis server may determine whether the type of the mobile IoT terminal is a fixed type (525 ).

In step 525, when it is determined that the type of the mobile IoT terminal is not a fixed type, that is, is a mobile type, the analysis server may output a control signal for performing wireless optimization of the bad cell (545). In step 545, the analysis server may select any one candidate cell based on the reception level of reference signals of neighboring cells adjacent to the serving cell of the mobile IoT terminal among the plurality of cells of the wireless network. The analysis server may select candidate cells by using, for example, values of the identification information fields of neighboring cells included in the quality report. The analysis server may perform wireless optimization of a bad cell by outputting a control signal for replacing the serving cell of the mobile IoT terminal with a candidate cell.

In step 525, when it is determined that the type of the mobile IoT terminal is fixed, the analysis server may determine whether the serving cell of the mobile IoT terminal is a main cell (540 ). When it is determined in step 540 that the serving cell of the mobile IoT terminal is the main cell, the analysis server may output a control signal for wireless optimization of the main cell (550). In step 550, the analysis server may determine whether a cell to which at least one IoT terminal is connected in a wireless network including a plurality of cells is a main cell. The analysis server may check whether the corresponding cell is the main cell through, for example, a serving cell ID (ECGI) field of the quality report. Here, the'main cell' may be understood as a cell to which the mobile IoT terminal accesses the most in a wireless network. Signals on the wireless network may overlap at the boundary section of a plurality of cells. The analysis server according to an embodiment may set, for example, a cell to which the mobile IoT terminal accesses the most during a preset period (ex. 7 days) in a wireless network as a main cell. When it is determined that the cell to which at least one IoT terminal is connected is the main cell, the analysis server adjusts wireless transmission of the main cell to at least one IoT terminal so that the at least one IoT terminal can receive a signal from the main cell. Control signal can be output. According to an embodiment, when it is determined that the cell to which the mobile IoT terminal is connected is the main cell, the analysis server may output a control signal for adjusting the radiation angle of the main cell.

In step 520, when it is determined that the reception level (RSRP) of the reference signal is higher than a preset threshold, that is, it is not defective, the analysis server performs a signal to interference plus noise ratio (SINR) of the mobile IoT terminal. It may be determined whether is defective (530). In step 530, when the signal-to-interference ratio (SINR) of the mobile IoT terminal is higher than a preset second threshold, that is, when the signal-to-interference ratio (SINR) is poor, the analysis server uses a fixed type of the mobile IoT terminal. It is possible to determine whether or not the cell is a main cell according to the determination result (525), and to perform the main cell radio optimization 550 or the bad cell radio optimization 545 according to the determination result.

In step 530, when the signal-to-interference ratio (SINR) of the mobile IoT terminal is lower than a preset second threshold (that is, when the signal-to-interference ratio (SINR) is not defective), the analysis server is Whether or not it can be determined (560).

In step 560, the analysis server may determine whether or not a defect exists in the mobile IoT terminal based on the number of transmissions of the (quality report) of the mobile IoT terminal. For example, if the number of transmissions of the mobile IoT device is more than once a day, and the collection of quality reports of more than one day as per date among quality reports collected for 7 days is omitted, the analysis server indicates that the mobile IoT device is defective. I can judge.

When it is determined that the mobile IoT terminal is defective in step 560, the analysis server may determine whether the mobile IoT terminal is buried underground based on the information on the mobile IoT terminal (570). When it is determined in step 570 that the mobile IoT terminal is buried underground, the analysis server may output a control signal such as, for example, providing an external antenna (580). When it is determined in step 570 that the mobile IoT terminal is not buried underground, the analysis server may output a control signal for replacing the mobile IoT terminal (575).

When it is determined that the mobile IoT terminal is defective in step 560, the analysis server may output a signal indicating that the mobile IoT terminal is good (365). The signal indicating that the mobile IoT terminal is good, output from the analysis server, may be displayed in the form of a green icon corresponding to the terminal device item 610 on the screen shown in FIG. 6, for example.

6 is a diagram illustrating an analysis result output from an analysis server and a control signal output based on the analysis result according to an exemplary embodiment. Referring to FIG. 6, an exemplary screen 600 showing a result of determining a defect of a terminal device, a battery of the terminal, and a wireless network environment by the analysis server according to an embodiment is shown. In the example screen 600, in addition to the information 605 on the mobile IoT terminal, the terminal device item 610, the battery item 630 of the terminal, the wireless environment item 650, the improvement plan item 670, and the cause of the problem. Detailed items 690 and the like may be displayed.

Information 605 on the mobile IoT terminal includes, for example, customer company, terminal classification, model name, battery remaining, terminal accommodation main cell (including location on the map), signal quality (e.g., detailed signal quality information (RSRP, SINR) Etc.) and the like).

For example, when it is determined that a defect exists in the mobile IoT terminal itself, the analysis server may output a control signal instructing to replace the mobile IoT terminal. In accordance with the control signal (mobile IoT terminal replacement signal) output from the analysis server, the button 615 included in the terminal device item 610 on the example screen 600 is displayed in red, for example, and the administrator (or user) Is able to determine that a defect exists in the mobile IoT terminal itself, that is, a terminal replacement is required. Alternatively, when it is determined that there is no defect in the mobile IoT terminal itself, the analysis server may output a control signal indicating that the mobile IoT terminal is good. The button 615 included in the terminal device item 610 on the example screen 600 may be displayed in green, for example, according to the control signal (mobile IoT terminal good signal) output from the analysis server.

Alternatively, when it is determined that the battery defect of the mobile IoT terminal exists, the analysis server may output a control signal to replace the battery of the mobile IoT terminal. According to the control signal (battery replacement signal) output from the analysis server, the button 615 included in the battery item 630 of the terminal in the example screen 600 is displayed in red, for example, so that the administrator (or user) It can be determined that a battery defect of the mobile IoT terminal exists, that is, a battery replacement is required.

In addition, when it is determined that a defect exists in the wireless network to which the mobile IoT terminal belongs, the analysis server may output a control signal for wireless optimization of a cell serving the mobile IoT terminal in the wireless network. According to the control signal (wireless cell optimization signal) output from the analysis server, the button 655 included in the wireless environment item 650 in the example screen 600 is displayed in red, for example, so that the administrator (or user) It can be used to determine the presence of defects in the wireless environment.

At this time, according to the control signal received from the analysis server in relation to the terminal device item 610, the battery item 630 of the terminal, and the wireless environment item 650, an improvement plan item 670, and a problem cause detail item 690 Information on may also be provided.

7 is a block diagram of an analysis server according to an embodiment. Referring to FIG. 7, the analysis server 700 according to an embodiment includes a communication interface 710, a processor 730, and a memory 750. The communication interface 710, the processor 730, and the memory 750 may communicate with each other through a communication bus 705.

The communication interface 710 receives a quality report from at least one mobile IoT terminal.

The processor 730 generates a call history record based on the quality report received through the communication interface 710. The processor 730 analyzes whether a defect exists in at least one of the wireless network and the mobile IoT terminal to which the mobile IoT terminal belongs through the call history record. The processor 730 outputs a control signal based on the analysis result.

The processor 730 may determine whether there is a battery defect of the mobile IoT terminal based on the battery information of the mobile IoT terminal included in the quality report. When it is determined that the battery defect exists, the processor 730 may output a control signal to replace the battery of the mobile IoT terminal. Alternatively, the processor 730 may determine whether there is a defect in the quality of the wireless network based on whether the received signal strength of the mobile IoT terminal included in the quality report is lower than a preset threshold. Alternatively, the processor 730 may determine whether a defect exists in the mobile IoT terminal based on the number of transmissions of the quality report.

In addition, the processor 730 may perform at least one method or an algorithm corresponding to at least one method described above through FIGS. 1 to 6. The processor 730 may be a data processing device implemented in hardware having a circuit having a physical structure for executing desired operations. For example, desired operations may include code or instructions included in a program. For example, a data processing device implemented in hardware is a microprocessor, a central processing unit, a processor core, a multi-core processor, and a multiprocessor. , Application-Specific Integrated Circuit (ASIC), and Field Programmable Gate Array (FPGA).

The processor 730 may execute a program and control the analysis server 700. The program code executed by the processor 730 may be stored in the memory 750.

The memory 750 may store a quality report received through the communication interface 710. In addition, the memory 750 may store a call history record generated by the processor 730 and/or an analysis result of the processor 730.

The memory 750 may store various pieces of information generated during processing in the processor 730 described above. In addition, the memory 750 may store various types of data and programs. The memory 750 may include a volatile memory or a nonvolatile memory. The memory 750 may include a mass storage medium such as a hard disk to store various types of data.

The method according to an embodiment may be implemented in the form of program instructions that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like alone or in combination. The program instructions recorded on the medium may be specially designed and configured for the present invention, or may be known and usable to those skilled in computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic media such as floptical disks. -A hardware device specially configured to store and execute program instructions such as magneto-optical media, and ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine language codes such as those produced by a compiler but also high-level language codes that can be executed by a computer using an interpreter or the like. The above-described hardware device may be configured to operate as one or more software modules to perform the operation of the present invention, and vice versa.

As described above, although the present invention has been described by limited embodiments and drawings, the present invention is not limited to the above embodiments, and various modifications and variations from these descriptions for those of ordinary skill in the field to which the present invention pertains. This is possible.

Therefore, the scope of the present invention is limited to the described embodiments and should not be defined, and should be defined by the claims and equivalents as well as the claims to be described later.

700: analysis server
705: communication bus
710: communication interface
730: processor
750: memory

Claims (20)

Collecting a quality report transmitted from at least one mobile Internet of Things (IoT) terminal;
Generating a call detail recording (CDR) based on the quality report;
Analyzing whether or not there is a defect in at least one of the wireless network to which the mobile IoT terminal belongs and the mobile IoT terminal through the call history record; And
Outputting a control signal based on the analysis result
Including,
The step of outputting the control signal
If it is determined that there is a defect in the quality of the wireless network, determining whether the type of the mobile IoT terminal is a mobile type or a fixed type; And
When it is determined that the type of the mobile IoT terminal is the fixed type, outputting a control signal for adjusting wireless transmission of the main cell so that the at least one IoT terminal can receive a signal from the main cell
Containing, the operating method of the analysis server. The method of claim 1,
The above quality report is
A method of operating an analysis server comprising at least one of battery information of the mobile IoT terminal and quality information of a wireless network to which the mobile IoT terminal belongs. The method of claim 1,
The above quality report is
The standard version of the quality report, the phone number of the mobile IoT terminal, information on the battery of the mobile IoT terminal, the serving cell ID of the mobile IoT terminal, the received signal strength of the mobile IoT terminal (Received Signal Strength Indicator; RSSI) , Model information of the mobile IoT terminal, version information of the model of the mobile IoT terminal, transmission power level of the mobile IoT terminal, GPS location information of the mobile IoT terminal, and signal strength around the mobile IoT terminal are higher 3 A method of operating an analysis server including at least one field item among identification information of dog cells. The method of claim 1,
The above quality report is
A method of operating an analysis server, which is transmitted by user datagram protocol (UDP). The method of claim 1,
The mobile IoT terminal is
A method of operating an analysis server for transmitting the quality report according to a transmission period preset for each type of the mobile IoT terminal. The method of claim 1,
The step of creating the call history record
Generating the call history record by applying a preset parsing rule to the quality report
Containing, the operating method of the analysis server. The method of claim 1,
The analyzing step
Determining whether there is a battery defect of the mobile IoT terminal based on the battery information of the mobile IoT terminal included in the call history record
Containing, the operating method of the analysis server. The method of claim 7,
The step of determining whether the battery defect is present
Determining whether the battery fault exists based on whether the remaining battery capacity of the mobile IoT terminal is smaller than a preset reference capacity; And
Determining whether the battery fault exists based on whether the measured value of the battery voltage of the mobile IoT terminal is smaller than a threshold value of a preset reference voltage
Including at least one of, the operating method of the analysis server. The method of claim 8,
The step of outputting the control signal
When it is determined that the battery defect is present, outputting a control signal to replace the battery of the mobile IoT terminal
Containing, the operating method of the analysis server. The method of claim 1,
The analyzing step
Determining whether or not there is a defect in the quality of the wireless network based on whether the received signal strength of the mobile IoT terminal included in the call history record is lower than a preset threshold
Containing, the operating method of the analysis server. delete The method of claim 1,
The step of outputting the control signal
When it is determined that the type of the mobile IoT terminal is mobile,
Selecting one of the plurality of cells of the wireless network based on a reception level of a reference signal of adjacent cells adjacent to the serving cell of the mobile IoT terminal; And
Outputting a control signal for replacing the serving cell of the mobile IoT terminal with the candidate cell
Containing, the operating method of the analysis server. The method of claim 1,
The step of outputting the control signal
When it is determined that the type of the mobile IoT terminal is fixed,
Determining whether a cell to which the at least one IoT terminal is connected is a main cell in the wireless network-the wireless network includes a plurality of cells; And
When the cell to which the at least one IoT terminal is connected is determined to be the main cell, wireless transmission of the main cell to the at least one IoT terminal so that the at least one IoT terminal can receive a signal from the main cell Outputting a control signal to adjust
Containing, the operating method of the analysis server. The method of claim 1,
The analyzing step
Determining whether or not a defect exists in the mobile IoT terminal based on the number of transmissions of the quality report
Containing, the operating method of the analysis server. The method of claim 14,
The step of outputting the control signal
If it is determined that a defect exists in the mobile IoT terminal, outputting a control signal instructing to replace the mobile IoT terminal
Containing, the operating method of the analysis server. The method of claim 1,
The mobile IoT terminal is
A method of operating an analysis server comprising a terminal for performing communication based on a narrow band-internet of things (NB-IoT). A computer program combined with hardware and stored in a computer-readable recording medium to execute the method of any one of claims 1 to 10 and 12 to 16. A communication interface for receiving a quality report from at least one mobile IoT terminal; And
Based on the quality report, a call history record is generated, and through the call history record, it is analyzed whether a defect exists in at least one of the wireless network to which the mobile IoT terminal belongs and the mobile IoT terminal, and the analysis result is Processor that outputs control signals based on
Including,
The processor is
When it is determined that there is a defect in the quality of the wireless network, it is determined whether the type of the mobile IoT terminal is a mobile type or a fixed type, and when it is determined that the type of the mobile IoT terminal is the fixed type, the at least one An analysis server that outputs a control signal for adjusting wireless transmission of the main cell so that the IoT terminal can receive a signal from the main cell. The method of claim 18,
The processor is
Based on the battery information of the mobile IoT terminal included in the call history record, it is determined whether there is a battery defect of the mobile IoT terminal, and when it is determined that the battery defect exists, the battery of the mobile IoT terminal is Analysis server that outputs a control signal to replace. The method of claim 18,
The processor is
Based on whether the received signal strength of the mobile IoT terminal included in the call history record is lower than a preset threshold, it is determined whether there is a defect in the quality of the wireless network, or the number of transmissions of the quality report Based on, the analysis server to determine whether there is a defect in the mobile IoT terminal.

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