KR20180112393A - Method for analyzing performance of V2X communication system and analysis system thereof - Google Patents

Abstract

The present invention relates to a method for analyzing the communication performance of a V2X communication system and an analysis system for performing the same. The method for analyzing the communication performance of a V2X communication system according to the present invention includes the steps of: receiving a region of interest to be analyzed; obtaining data corresponding to the region of interest of data for a wireless signal transmitted or received in the V2X communication system; and deriving an analysis result using performance indicators corresponding to the data of the region of interest. The region of interest is set in a time or space area, or is set based on a performance indicator associated with at least one of a signal transmitting vehicle and a receiving vehicle. Accordingly, the present invention can effectively and easily test the V2X communication system.

Description

TECHNICAL FIELD [0001] The present invention relates to a method of analyzing communication performance of a V2X communication system and an analyzing system for performing the same,

The present invention relates to a method and system for analyzing communication performance of a Vehicle to Everything (V2X) communication system.

Automobiles are being developed in the direction of providing safety, mobility, and convenience with ICT technology. By applying sensors such as radar and vision to the vehicle, the company provides safety support services such as blind zone warning, collision warning and ACC (Adaptive Cruise Control) to the driver. DSRC (Dedicated Short-Range Communications) And provides convenient services such as automatic fare collection and bus guide service.

In recent years, vehicle safety, cooperative autonomous navigation using V2X communication technology, and Cooperative-ITS (C-ITS) technology have been studied. V2X communication technology refers to vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communication from the vehicle point of view. Pedestrian to Vehicle (P2V), Pedestrian to Driver (P2D), Pedestrian to Driver (P2V), Pedestrian to Infrastructure (C-ITS), including pedestrian and pedestrian, A comprehensive connection can be considered, including pedestrian to infra-structure (P2I), road sensor network and road-to-infrastructure (R2I) and in-vehicle networks.

Multiple wireless communication technologies are used to provide all the considered connections in a C-ITS environment. For example, WAVE (Wireless Access in Vehicular Environments) communication technology is used for V2V / V2I communication, WLAN or Bluetooth technology is used for P2V / P2I communication, and sensor communication technology can be used for R2I communication have.

On the other hand, the V2X communication system is intended to provide safety and convenience services to all vehicles traveling in the C-ITS environment through V2V or V2I-based cooperative communication. Performance is required.

However, the verification and evaluation of the V2X communication system in actual road environment requires a lot of time and cost due to the characteristics of the test environment, and it is difficult to repeatedly test the same scenario.

It is an object of the present invention to provide a communication performance analysis method of a V2X communication system and an analysis system for performing the communication performance analysis of a V2X communication system.

A method for analyzing communication performance of a V2X communication system according to an exemplary embodiment of the present invention includes: receiving an interval of interest to be analyzed; Obtaining data corresponding to the period of interest among data on a radio signal transmitted or received in the V2X communication system; And deriving an analysis result using performance indices corresponding to the obtained interest range data, wherein the interest interval is set in a time or space area, or is related to at least one of a signal transmitting vehicle and a receiving vehicle It is set based on the performance index.

The analysis system according to an embodiment of the present invention can test the V2X communication system using the communication performance analysis method of the V2X communication system.

Meanwhile, the steps according to the communication performance analysis method of the V2X communication system may be configured as a computer program to be performed in the analysis system according to an embodiment of the present invention, and the computer program is stored in a computer-readable medium .

In addition, an analysis system for testing a V2X communication system according to an embodiment of the present invention is connected to a V2X communication system provided in a vehicle by using wired / wireless communication, and transmits data about wireless signals transmitted or received in the V2X communication system A data collector for collecting data; A server for receiving the radio signal data collected by the data collector and storing the received radio signal data in a database, and for transmitting the received radio signal data; And a client for acquiring data corresponding to a period of interest in the radio signal data received from the server and deriving an analysis result using performance indicators corresponding to the obtained interest section data, Time or space area, or set based on a performance indicator associated with at least one of the signal transmitting vehicle and the receiving vehicle.

Here, the wireless signal data may be collected from two or more layers among a plurality of layers constituting the V2X communication system.

According to the embodiment of the present invention, the V2X communication system collects data on a wireless signal transmitted or received in the V2X communication system, and transmits the collected data to a client for analysis so that the V2X communication system can be tested easily and efficiently.

In addition, data is collected for a plurality of layers constituting the V2X communication system, such as received signal information, vehicle communication messages, logic data, and application result values, so that the cause of the problem according to the test result is more accurately analyzed can do.

According to another embodiment of the present invention, it is possible to set an interval of interest for analyzing the communication performance of the V2X communication system, which is set in the time or space area or based on the performance index related to the signal transmission / reception vehicle, It is easy to extract and analyze the section.

1 is a block diagram showing the overall configuration of an analysis system according to an embodiment of the present invention.
2 is a diagram for explaining an embodiment of the configuration of the V2X communication system.
3 is a flowchart illustrating an analysis method for testing a V2X communication system according to an exemplary embodiment of the present invention.
4 is a block diagram illustrating an embodiment of a configuration of a data collector.
5 and 6 are diagrams for explaining embodiments of functions and operations of the data collector.
7 is a timing diagram illustrating an embodiment of a method for a data collector to collect wireless signal data from a V2X communication system.
8 is a view for explaining an embodiment of a user interface (UI) provided from a data collector.
9 is a block diagram for explaining an embodiment of a configuration of a data collector having a radio signal generation function.
10 is a block diagram showing an embodiment of a configuration of a server.
11 is a flowchart illustrating a communication performance analysis method of a V2X communication system according to an embodiment of the present invention.
FIG. 12 is a flowchart for explaining an embodiment of a method of obtaining interest interval data.
13 is a block diagram for explaining an embodiment of a configuration of a client.
14 is a diagram illustrating an embodiment of a user interface (UI) provided for communication performance analysis of a V2X communication system.
FIG. 15 is a diagram for explaining a first embodiment of a method of setting an interest interval in a time domain.
FIG. 16 is a diagram for explaining a second embodiment of a method of setting an interest interval in a time domain.
17 is a diagram showing an embodiment of a user interface (UI) provided for setting up additional functions.
18 is a view for explaining an embodiment of a method of setting an interest interval based on a performance index.
FIG. 19 is a diagram for explaining an embodiment of a method for selecting a rule for extracting data corresponding to a region of interest.
20 is a diagram for explaining an embodiment of a method of managing a tag.
21 is a diagram showing an embodiment of a user interface (UI) provided for adding a graph.
22 is a diagram showing the types of graphs for displaying analysis results.
23 is a diagram showing an embodiment of values displayed on the y-axis of the graph.
24 is a diagram showing an embodiment of values displayed on the x-axis of the graph.
25 is a view showing an embodiment of a user interface (UI) provided for selecting a vehicle to be subjected to performance analysis.
FIGS. 26 to 28 are diagrams for explaining embodiments of a method of setting an interest interval in a spatial domain.

Hereinafter, a method of analyzing a vehicle-to-object communication system according to the present invention and an analysis system using the same will be described in detail with reference to the accompanying drawings.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood that the present invention is not intended to be limited to the specific embodiments but includes all changes, equivalents, and alternatives falling within the spirit and scope of the present invention.

In describing the present invention, the terms first, second, etc. may be used to describe various components, but the components may not be limited by the terms. The terms may only be used for the purpose of distinguishing one element from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

The term " and / or " may include any combination of a plurality of related listed items or any of a plurality of related listed items.

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 be present in between Can be understood. On the other hand, when it is mentioned that an element is "directly connected" or "directly connected" to another element, it can be understood that no other element exists in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions may include plural expressions unless the context clearly dictates otherwise.

In the present application, the terms "comprises", "having", and the like are used interchangeably to designate one or more of the features, numbers, steps, operations, elements, components, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries can be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are, unless expressly defined in the present application, interpreted in an ideal or overly formal sense .

In addition, the following embodiments are provided to explain more fully to the average person skilled in the art. The shapes and sizes of the elements in the drawings and the like can be exaggerated for clarity.

FIG. 1 is a block diagram of an overall configuration of an analysis system according to an exemplary embodiment of the present invention. The analysis system 100 performs an analysis method for testing the V2X communication system 10. FIG.

Referring to FIG. 1, the analysis system 100 may include a data collector 110, a server 120, and a client 130.

The data collector 110 collects data on a wireless signal transmitted or received in the V2X communication system 10. The server 120 transmits wireless signal data collected by the data collector 110 to the client 130, As shown in FIG.

Here, the V2X communication system 10 attaches to a vehicle and periodically transmits packet messages related to vehicle safety and the like, and periodically receives packet messages from a V2X communication system (not shown) attached to another vehicle.

The packet messages transmitted and received between the V2X communication systems include the ID information of the vehicle, the location information and the state information (for example, the traveling direction and speed, the deceleration and acceleration state, etc.) .

The V2X communication system 10 can know the distance between the vehicle to which it is attached and the nearby vehicle and the operation state of the surrounding vehicle by using the packet message periodically received from the V2X communication system of another vehicle as described above, It is possible to judge a dangerous situation.

On the other hand, a hardware module and a software stack to which a technology according to a standard standard is applied are included in the V2X communication system 10 so that a packet message can be transmitted and received between vehicles or between a vehicle and an infrastructure in a propagation environment in which the vehicle moves at high speed within a short period of time do.

For example, WAVE communication technology standardized by IEEE in the United States is a technology that can transmit and receive packet messages between vehicles or vehicles and infrastructures within a short time of up to 1 km within 100 msec in a high-speed propagation environment.

As shown in FIG. 2 (a), the V2X communication system 10 to which the WAVE communication technology is applied may include a V2X communication module, a GPS module, a memory, a processor, and the like.

A processor included in the V2X communication system 10 is a processor for driving a safety application and can be interlocked with a vehicle internal network and can transmit application result values such as various warnings to a driver's display device have.

In addition, the software stack of the WAVE communication system can be divided into software on the kernel and application service software. Here, the software on the kernel includes a device driver, a MAC transmission / reception function, a routing function, an IP packet function, a WSMP safety message function, a management function and an authentication and security protocol function. The application service software includes a vehicle safety service, And an operator interface.

More specifically, the software stack of the WAVE communication system is composed of a plurality of layers as shown in FIG. 2 (b), and the plurality of layers are each designed to satisfy the function and performance of a specific communication standard will be.

Table 1 below shows information on a plurality of standards required for implementing a WAVE communication technology.

Referring to FIG. 2 (b) and Table 1, the WAVE communication technology uses a frequency band of 5.9 GHz and is designed to satisfy IEEE 802.11p and IEEE 1609.x standards.

IEEE 802.11p includes a physical (PHY) layer and a MAC layer for wireless transmission, and the IEEE 1609.x standard includes a multi-channel layer, a network layer, an authentication and security layer, and an application service layer that are mounted on IEEE 802.11p .

The SAE J2735 specification includes a message layer and defines a set of Dedicated Short Range Communication (DSRC) messages that are transmitted and received between vehicles or between the vehicle and the infrastructure.

On the other hand, the SAE J2735 specification includes the message layer, includes the Safety Application layer, and defines the performance requirements and verification standards required for the service.

The V2X communication system 10 according to an exemplary embodiment of the present invention may include a V2X communication module including a plurality of layers to satisfy the WAVE communication standards as described with reference to FIG. 2 and Table 1, The present invention is not limited thereto, and may be in accordance with other inter-vehicle communication standard specifications.

1, the analysis system 100 may include a plurality of data collectors 110, 140, and the plurality of data collectors 110, 140 may include a plurality of V2X communication systems 110, It is possible to collect the radio signal data as described above from the mobile stations 10 and 11.

In this case, the server 120 may collect the radio signal data for all the V2X communication systems 10 and 11 by receiving radio signal data collected from the plurality of data collectors 110 and 140, respectively, The number of data collectors 110, 140 or V2X communication systems 10, 11 through which the wireless signal data is collected by the server 120 may be set to a value of two or more, depending on the capabilities of the analysis system 110 .

While the present invention has been described above by way of example in which the radio signal data for a plurality of V2X communication systems 10 and 11 are collected by a plurality of data collectors 110 and 140, , 11), e. G., By a single data collector 110. < / RTI >

According to an embodiment of the present invention, data from two or more layers among a plurality of layers constituting a communication module of the V2X communication system 10 are collected by the data collector 110 in a test process, (120) to the client (130) to analyze the test results for the V2X communication system (10).

Accordingly, the test for the V2X communication system 10 can be performed easily and efficiently, and in the case where a problem occurs in the test result, it is possible to accurately analyze at what layer the cause of the problem occurs.

Hereinafter, embodiments of a method and system for analyzing a vehicle-to-object communication system according to the present invention will be described in detail with reference to FIG. 3 to FIG.

FIG. 3 is a flowchart illustrating an analysis method for testing a V2X communication system according to an exemplary embodiment of the present invention. Referring to FIG. 3, an analysis method according to an exemplary embodiment of the present invention, In the following description.

Referring to FIG. 3, the data collector 110 collects data on a wireless signal transmitted or received from the V2X communication system 10 (step S300).

The wireless signal data collected in step S300 may be collected from a plurality of layers constituting the V2X communication system 10 and may include received signal information, vehicle communication messages, logic data, application result values, and the like .

Preferably, more than one of the received signal information, the vehicle communication message, the logic data, and the application result value may be collected from the V2X communication system 10 by the data collector 110.

The received signal information includes Received Signal Strength Indicator (RSSI) and Channel Busy Ratio (CBR), which may be data collected from the physical / MAC layer of the V2X communication system 10.

Here, the data collected from the physical / MAC layer of the V2X communication system 10 is not limited to the received signal strength (RSSI) and the channel busy ratio (CBR), and the SNR including the noise information (Signal to Noise Ratio ), And the like.

On the other hand, the vehicle communication message includes Basic Safety Message (BSM) data received from one or more other V2X communication systems (not shown) to the V2X communication system 10, Data collected from the layer.

The BSM includes BSM data elements defined in the SAE J2735 standard and includes, for example, UTC time, Latitude, Longitude, Elevation, Speed, Heading, Data such as system state (traction, abs, scs, brakeBoost, auxBrakes) and vehicle size (Width, Length)

Here, the data collected from the message layer of the V2X communication system 10 is not limited to the above-described data, and further includes data related to the nearby vehicles such as the PATH HISTORY and PATH PREDICTION can do.

The logic data is computed in the V2X communication system 10 using a vehicle communication message received from one or more other V2X communication systems (not shown), and includes the object classification (TC) defined in the SAE J2945 standard, Time-to-collision (TTC), time-to-intersection (TTI), and distance-to-intersection (DTI)

The application result value is determined in the V2X communication system 10 using the calculated logic data. The application result value is a forward collision warning (FCW), an emergency brake warning (EEBL) A vehicle safety application such as Brake Lights, Blind Spot Warning, LCW, Lane Change Warning and Intersection Movement Assist (IMA).

Here, the logic data and application result values may be collected by the data collector 110 from the Safety Application layer of the V2X communication system 10. [

The server 120 transmits at least a part of the wireless signal data collected by the data collector 110 from the V2X communication system 10 to the client 130 in step S300.

Thereafter, the client 130 analyzes the test result of the V2X communication system 10 using the wireless signal data transmitted from the server 120 (step S320).

For example, the client 130 may perform real-time tracking of the test results currently being performed using the wireless signal data transmitted from the server 120, It is possible to perform the performance analysis on the test result that has been completed by receiving the signal data.

Although the functions and operations of the data collector 110, the server 120 and the client 130 constituting the analysis system 100 have been described with reference to FIGS. 1 to 3, And two or more of the components may be merged into one component or some of the functions and operations of the components may be performed by other components.

For example, in the above description, the client 130 analyzes the test result using the wireless signal data transmitted from the server 120. However, At least some of the analysis steps may be performed by the server 120.

The data collector 110 may further collect location information of the vehicle to which the V2X communication system 10 is attached and the collected location information may be synchronized with the wireless signal data collected from the V2X communication system 10, To the client 130 via the network 120.

The client 130 may extract a part of the wireless signal data transmitted from the server 120 and perform the analysis. However, the present invention is not limited thereto, and the server 120 may collect the wireless signal data collected by the data collector 110 The client 130 may extract some data to be analyzed from the wireless signal data and transmit the extracted data to the client 130.

Figure 4 is a block diagram of one embodiment of the configuration of a data collector. The data collector 110 shown includes a core layer 111 and a plug-in layer 112, .

Referring to FIG. 4, the core layer 111 may include an input adapter and an output adapter for data input / output, and a control adapter for a test control interface (TCI). The test control interface (TCI) may be a special protocol that works only with a specific V2X communication system, and may be a standardized protocol.

The data collector 110 is connected to the V2X communication system 10 and the positioning system via the input adapter in a wired or wireless communication manner to transmit data about wireless signals transmitted or received in the V2X communication system 10, It is possible to collect positional information of the user.

The wireless signal data and the position information may be temporarily stored in the database of the core layer 111 in synchronization with each other. The wireless signal data and the position information stored in the database may be exported to a file through an output adapter, Or may be transmitted to the server 120 and uploaded.

On the other hand, test control interfaces (TCIs) may be provided that include conditions for testing the V2X communication system 10 of the vehicle via the control adapter of the core layer 111.

The core layer 111 includes an input manager for managing and controlling the operations of the data collector 110 as described above, an output manager sync, a database manager, a flow manager, a configuration manager, and a status control may be provided.

5, the data collector 110 receives positioning data collected from a positioning system through a source device plug-in of a positioning device using UDP (User Datagram Protocol ).

Also, the data collector 110 can receive the V2X packet, which is the wireless signal data collected from the V2X communication system 10, via the OBU source plug-in using UDP using the Ethernet communication method.

The Ethernet communication method and the UDP protocol are examples of a communication method used by the data collector 110 for collecting data, and the present invention is not limited thereto.

As described above, the V2X packet and the positioning data input through the OBU source plug-in and the positioning device source plug-in are synchronized with each other by the data / procedure manager and then transmitted through the upload sync plug-in May be transmitted to the server 120.

Here, the V2X packet and the positioning data can be uploaded to the server 120 in HTTPS using an LTE (Long Term Evolution) communication method, but the present invention is not limited thereto. For example, various wired / wireless communication methods such as WIFI Can be used.

More specifically, as shown in FIG. 6, the location information (positioning data) and the wireless signal data (V2X packet) are temporarily stored in the database including the system timestamp for time synchronization, 120, < / RTI >

Meanwhile, the V2X packet and positioning data may be output to a file via an output sync plug-in.

As described above, the data collector 110 configures a data input / output interface in an expandable plug-in form to transmit data from various vehicle sensors as well as a V2X communication system and a positioning system by using a communication method such as Ethernet, USB, And can transmit data in various forms using a communication method such as 3G, 4G, Wifi, and file I / O.

7 shows a timing diagram of one embodiment of a method for data collector 110 to collect wireless signal data from V2X communication system 10 and includes the same steps as those described with reference to Figures 1-6, A description of what will be described below will be omitted.

Referring to FIG. 7, the data collector 110 may send a "PKT SETUP" packet to the V2X communication system 10 to set a parameter for testing the V2X communication system 10. [

For this purpose, the data collector 110 may first set communication parameters for performing the test through a user interface (UI) provided as shown in the screen of FIG. 8 may be displayed on the client 130 or may be displayed on the data collector 110 when the data collector 110 includes a display module.

Specifically, the "Logger UI" provided from the data collector 110 includes a first area 810 for displaying on the map information about the location where the test is performed, a V2X / GPS A second area 820 for indicating a packet, location information (latitude, longitude, altitude) and received signal strength (RSSI), and parameters for performing a radio signal performance test, And a third area 830 for identifying the first area 830.

(TID) for identifying the test, a VEHICLE ID for identifying the vehicle, and a device ID (DEVICE ID) for identifying the V2X communication system to be tested through the third area 830, And a radio signal to be tested can be selected.

In addition, the user can activate the transmission / reception mode (TX MODE, RX MODE), set the channel (CHAN), set the transmission / reception antennas (TX ANT, RX ANT) You can set the transmit / receive control (TX CTRL), or set the packet rate (RATE), length (LEN) and interval (INTERVAL).

In the lower portion of the third area 830, the connection with the outside through the input / output plug-ins of the data collector 110 as described above can be respectively set and controlled, and the connection state and the information transmission The state can be confirmed.

The "PKT_SETUP" packet transmitted from the data collector 110 to the V2X communication system 10 includes a "PKT_SETUP " packet including parameters set through the third area 830 of the" Logger UI "Quot; VPCONF "packet to the V2X communication system 10.

The data collector 110 then sends a "PKT_STAT" packet to the V2X communication system 10 to request confirmation of the operational state (normal operation) of the V2X communication system 10, The control unit 10 may transmit the packet VPSTAT to the data collector 110 including information on its operating state (normal operation state).

The operation status confirmation request from the data collector 110 to the V2X communication system 10 and the operation status information response from the V2X communication system 10 to the data collector 110 may be periodically performed.

Thereafter, when the data collector 110 transmits a "PKT_START" packet for notifying the start of data collection to the V2X communication system 10, the packet data PKT_TX and PKT_RX transmitted and received by the V2X communication system 10, Data PKT_GPS may be sent to data collector 110 and begin to be collected.

When data collector 110 transmits a "PKT_STOP" packet to notify completion of data collection to V2X communication system 10, data transmission from V2X communication system 10 to data collector 110 may be terminated.

According to another embodiment of the present invention, the data collector 110 further includes a function of generating a wireless signal to be used for testing of the V2X communication system 10, ) Can be easily performed to test for high risk or repetitive situations.

9 is a block diagram for explaining an embodiment of a configuration of a data collector having a wireless signal generating function, wherein the data collector shown may be implemented in the form of a test box 150 including a V2X communication module 151 have.

9, the test box 150 may include a V2X communication module 151, a GPS module 152, a wireless communication module 153, and a plurality of antennas for wireless signal transmission and reception.

The V2X communication module 151 is configured to include a plurality of layers according to the above-described vehicle communication standard specifications, and can generate a wireless signal including a packet message for vehicle communication and transmit the wireless signal through the antenna.

The configuration and operation of the V2X communication module 151 may be the same as the configuration of the V2X communication system 10 as described above, and a detailed description thereof will be omitted.

The wireless signal generated by the V2X communication module 151 may be transmitted to the V2X communication module 151 in accordance with vehicle communication standard specifications (for example, IEEE 802.11p, IEEE 1609.x, and SAE J2735) Lt; / RTI > message.

Meanwhile, the GPS module 152 may generate a GPS signal including virtual vehicle location information and transmit the GPS signal through the antenna.

The wireless signal generated by the V2X communication module 151 and the GPS signal generated by the GPS module 152 may be received in peripheral V2X communication systems including the V2X communication system 10. [

In this case, the wireless signal received by the V2X communication system 10 and the data of the GPS signal may be collected by the test box 150 through the input interface 154 using a communication method such as Ethernet, CAN, have.

The wireless signal and the GPS signal data collected by the test box 150 are stored in the database 155 and can be uploaded to the server 120 through the wireless communication module 153 using a communication method such as LTE or WIFI .

Also, through the sensor interface 156 provided in the test box 150, various sensing data can be additionally collected from the external environment.

FIG. 10 is a block diagram illustrating an exemplary configuration of a server. The server 120 includes a database 124, a management module 121, a data receiving unit 122, and an output data generating unit 123 Lt; / RTI >

10, the wireless signal data collected by the data collector 110 and uploaded to the server 120 may be stored in the database 124. [

The management module 121 includes an authentication management unit for managing user authentication and the like, a data management unit Data for creating a space for storing new test data and assigning an ID (test ID) a rule manager for managing an analysis rule for extracting data of interest, a report manager for organizing data for a plurality of tests and providing the data as a report, have.

The data receiving unit 122 includes a decompressor, an authenticator, a checker, a filter, and a field mapper. The control unit 121 controls the data receiving unit 122, The data can be collected according to the data.

The output data generator 123 includes a query receiver for receiving data collected through the data receiver 122 and an output data generator for outputting the input data to the client 130 can do.

The server 120 first generates a test ID for identifying the test through the management module 121 and uploads the collected data from the data collector 110 through the data receiving unit 122, 130).

For example, the decompression unit of the data receiving unit 122 selectively performs decompression of the raw data collected by the data collector 110, the authentication unit performs authentication for the user, The range of the raw data value (Value range) and the test ID (TEST ID) can be confirmed.

Thereafter, after invalid data is filtered by the filter, the field mapping unit can use the test ID (TEST ID) and the vehicle ID (VEHICLE ID) to optimize the data field and reconstruct the data structure.

The data output from the field mapping unit may be composed of basic data to be transmitted to the client 130 by the output data generation unit 123.

Meanwhile, the basic data configured as described above may be divided into test IDs (TEST IDs) and stored in the database 124.

The client 130 can analyze the test result for the V2X communication system 10 using the basic data transmitted from the server 120. [

According to an embodiment of the present invention, it is possible to extract data corresponding to an interest interval to be analyzed from the wireless signal data collected from the V2X communication system 10 and to analyze the data, Can be extracted and analyzed.

For example, the interest interval may be set in a time or space area, or may be set based on a performance index associated with a signal transmission / reception vehicle.

For this purpose, the data collector 110 is connected to the V2X communication system provided in the vehicle using wired / wireless communication, and can collect data on the wireless signal transmitted or received in the V2X communication system.

The server 120 may receive the wireless signal data collected by the data collector 110, store the wireless signal data in a database, and transmit the received wireless signal data to the client 130.

Meanwhile, the client 130 may obtain the data corresponding to the period of interest in the radio signal data received from the server 120, and derive the analysis result using the performance indicators corresponding to the obtained interest interval data have.

Here, the data collector 110 collects vehicle location information from a positioning system installed in the vehicle, and the collected vehicle location information is transmitted to the client 130 through the server 120, It is possible to further acquire the vehicle position information corresponding to the section.

Hereinafter, embodiments of a method and system for analyzing the communication performance of the V2X communication system according to the present invention will be described in detail with reference to FIGS. 11 to 28. FIG.

11 is a flowchart illustrating a communication performance analysis method of a V2X communication system according to an exemplary embodiment of the present invention. The wireless signal data collected by the data collector 110 of the analysis system 100 is transmitted to the client 120 via the server 120, And then transmitted to the controller 130 to analyze the performance of the V2X communication system.

Referring to FIG. 11, the client 130 selects a region of interest to be analyzed (Step S1100).

For example, the wireless signal data collected in the completed test process is stored in the database of the server 120, and the user can select a test ID (TEST ID) and an interest interval to analyze.

The attention interval may be set in the time or space area, or may be set based on a performance indicator associated with at least one of the signal transmitting vehicle and the receiving vehicle.

Here, the interest interval may be set by specifying an analysis start point and an end point in a time domain, or may be set by designating an area on a map image indicating a movement path of vehicles that transmit and receive wireless signals.

Alternatively, the interest interval may be set based on a performance index indicating a motion characteristic associated with at least one of the signal transmitting vehicle and the receiving vehicle, and the motion characteristic may be set based on a vehicle position, a vehicle speed, a vehicle traveling direction, A relative angle between the vehicles, and the like.

The interest interval may be set based on a performance index indicating a signal characteristic associated with at least one of the signal transmitting vehicle and the receiving vehicle, and the signal characteristics may include at least one of a signal transmission strength, a data transmission rate, a received signal strength, Packet length, and the like.

Meanwhile, a rule for extracting data corresponding to the interest interval may be predefined in the system or generated by a user, and the data extraction rule may be stored in the database of the server 120 have.

Thereafter, the client 130 acquires data corresponding to a region of interest of data transmitted or received in the V2X communication system (S1110).

For this purpose, the server 120 may search the database for data corresponding to the test ID (TEST ID) selected by the user and transmit the data to the client 130, and the client 130 transmits the data corresponding to the TEST ID selected by the user together with the wireless signal data of the V2X communication system And may receive synchronized vehicle positioning data from the server 120 using the system time stamp.

The method in which the client 130 obtains the radio signal data and the vehicle positioning data of the V2X communication system in the step S1110 is performed by the data collector 110 as described with reference to Figs. Wireless signal data and positioning data are collected from the communication system and the positioning system, and the collected data can be transmitted to the client 130 through the server 120. [

Here, the data collector 110 may collect wireless signal data from a plurality of layers constituting the V2X communication system.

In step S1100, the client 130 may filter data received from the server 120 or may receive the filtered data from the server 120 to obtain data corresponding to the interval of interest. 130, which will be described in detail below with reference to FIG.

After the interest interval data is obtained, the client 130 derives the analysis result using the performance indexes corresponding to the obtained interest interval data (S1120).

Here, the client 130 may generate and provide a two-dimensional or three-dimensional graph for displaying one or more performance indicators, and the performance indicator may be freely designated as a value of the x-axis, the y-axis, and the z-axis of the graph .

For example, in the case of a two-dimensional graph, if a first performance index to be displayed on the x-axis and a second performance indicator to be displayed on the y-axis are selected among a plurality of performance indexes, A graph for displaying the second performance index values on the y-axis can be constructed.

Meanwhile, the performance indicator may be calculated using the radio signal data and the positioning data obtained in step S1112, and may be calculated based on the RSSI, the PDR, the PER, the round- RTT, Round-Trip Time, Distance, Time, Relative Velocity, Angle between Vehicle's Traveling Direction, TC Power, Data Transfer Rate (Data Rate) and a Packet Length (Packet Length), but the present invention is not limited thereto.

FIG. 12 is a flowchart illustrating an embodiment of a method for acquiring the interest interval data. In FIG. 11, the client 130 acquires interest interval data in step S1110.

Referring to FIG. 12, the client 130 transmits information on the interest interval selected by the user to the server 120 (step S1111).

For example, when the user selects a test ID (TEST) to be analyzed, selectable data extraction rules for the test may be displayed. When the user selects a data extraction rule to be applied to the analysis among the displayed data extraction rules, information on the name and the like for identifying the data extraction rule is transmitted to the client 130, Lt; / RTI >

In this case, the server 120 searches the database using information (e.g., an identification name) about the data extraction rule (Rule) transmitted from the client 130, and transmits the corresponding rule as wireless signal data To the client 130.

Accordingly, the client 130 receives a rule for extracting the wireless signal data collected from the V2X communication system 10 and the data corresponding to the interest interval from the server 120 (step S1112).

Thereafter, the client 130 extracts data corresponding to the interest interval of the wireless signal data received from the server 120 according to the data extraction rule received from the server 120 (step S1113).

12, the server 120 transmits a data extraction rule for a region of interest to the client 130, and the client 130 extracts interest region data. However, The present invention is not limited thereto.

For example, the server 120 extracts the interest interval data by searching the database for a data extraction rule for the selected interest interval in the client 130 and applying it to the wireless signal data collected by the data collector 110 So that the client 130 may receive the extracted wireless signal data from the server 120 so as to correspond to the interest interval.

13 is a block diagram for explaining an embodiment of the client configuration. The client 130 includes a database 131, a data acquisition unit 132, a preprocessing unit 133, and an analysis unit 134 And the like. The operation of the client 130 shown in FIG. 13 will not be described below with respect to the same description as that described with reference to FIGS. 1 to 12. FIG.

13, the data received from the server 120 through the data acquisition unit 132 of the client 130 and the interest interval data extracted by the preprocessing unit 133 may be stored in the database 131 have.

For this purpose, the data acquisition unit 132 may include a decompression unit for selectively performing decompression on data received from the server 120, an authentication unit for performing user authentication, and a test ID And a query generating unit for querying the data.

The preprocessor 133 applies filtering such as a time filter, a space filter, and a metric filter to the data received from the server 120 through the data obtaining unit 132 , It is possible to extract interest interval data.

For example, if the interest interval is set in the time domain, a time filter is applied to the data received from the server 120 to extract data corresponding to a specific time domain. If the interest domain is set in the spatial domain A space filter may be applied to the data received from the server 120 to extract data corresponding to a specific location area.

In addition, when the interest interval is set based on the performance index indicating the motion characteristics or the signal characteristics of the signal transmission / reception vehicle, a metric filter is applied to the data received from the server 120, Data can be extracted.

Meanwhile, the analysis unit 134 calculates performance indicators for analyzing the test results using the interest interval data output from the preprocessing unit 133, and constructs an image such as a graph for indicating the calculated performance indicators can do.

More specifically, the packet error calculation unit of the analysis unit 134 calculates the packet error rate (PER) of the V2X communication system, and the position calculation unit can calculate the inter-vehicle distance and the like.

In addition, the image forming unit of the analyzing unit 134 constitutes a map image for displaying the moving path of the vehicle with the passage of time, and the received signal strength (RSSI) of the V2X communication systems varying with the passage of time, (PDR), packet error rate (PER), and the like.

The map image and the graph image constructed as described above can be displayed on the screen through a display module (not shown) provided or connected to the client 130. [

When a test ID (TEST ID) to be analyzed is selected after the analysis menu for analyzing the performance index of the V2X communication system is selected in the analysis system 100, a user interface (UI) as shown in FIG. 14 is selected And may be displayed on the screen of the client 130.

14, a screen for communication performance analysis includes a map area 1410, a time setting area 1420, a test information area 1430, a vehicle information area 1440, a common setting area 1450, (1460) and a graph addition region (1470).

In the map area 1410, a map image indicating the position of each vehicle at the current time point along with the travel path of the vehicles participating in the test may be displayed.

The map image is automatically scrolled so as to display the moving path and the current position of all the vehicles, and the zoom ratio is changed. The map image is automatically scaled according to the time period set in the time setting area 1420 or the common setting area 1450 . ≪ / RTI >

In the time setting area 1420, a user interface (UI) may be provided that allows the user to specify an analysis start point and an end point in order to set the interval of interest in the time domain.

Referring to FIG. 15A, on the time bar representing the time interval of the entire test, the buttons 1421 and 1422 which correspond to the analysis start point and the end point and are movable in the left and right direction can be displayed have.

As shown in (b) of FIG. 15, the user can move the start point button 1421 and the end point button 1422, respectively, and set a time period to be analyzed.

When the time interval is set in the time setting area 1420 as described above, the map image displayed in the map area 1410 and the vehicle information displayed in the vehicle information area 1440 can be automatically changed according to the set time period.

In the test information area 1430, a test ID (TEST ID) for identifying a test to be analyzed and test execution time information are displayed, and a brief description of the test may be displayed.

Information on the vehicles participating in the test may be displayed in the vehicle information area 1440. The vehicle information to be displayed may include a vehicle ID, a V2X communication system type, Channel mode (Ch./Div. Mode), number of transmit / receive packets (# of TX / RX), data rate used during test, transmit power (TX Power), and packet length .

Meanwhile, the common setting area 1450 may be provided with a user interface (UI) for setting a selection to be used for generating a graph indicating the analysis result.

Referring to FIG. 16, the user can directly input the start and end points of analysis using the time input boxes 1451 and 1452 displayed in the common setting area 1450 to set the interest interval.

Also, the user can select either the internal GPS (external GPS) or the external GPS (external GPS) using the GPS setting box 1453, and the changed time period or GPS setting is reflected by pressing the refresh button .

In the additional setting area 1460, a user interface (not shown) for setting or managing a data extraction rule (Rule), a tag (Tag) and an effective time interval (Valid Time Range) (UI) may be provided.

Referring to FIG. 17, the user can select a mobility rule button 1461 in the additional setting area 1460 to create, apply, or edit / delete a data extraction rule (Rule).

For example, if the user selects to generate a mobility rule to set an interval of interest, a user interface (UI) for setting a data extraction rule (Rule) as shown in FIG. 18 may be provided .

18, the data extraction rule includes a rule name, an application type, a mobility type, a transmitted vehicle information (TX Vehicle), received vehicle information RX Vehicle) and a Rule Script for defining an interval of interest.

Here, the distinguished name is a rule name for identifying the corresponding rule, and the application type and the mobility type indicate a type of a tag to be generated as a result of the corresponding rule (TX Vehicle) indicates a vehicle to transmit a radio signal, and received vehicle information (RX Vehicle) indicates a vehicle to receive a radio signal.

On the other hand, a script is a data extraction rule created by a combination of commands according to a predetermined grammar.

The script can be used to define conditions for a performance indicator (e.g., a vehicle's motion or signal characteristics) associated with at least one of a signal transmitting vehicle and a receiving vehicle, So that the analysis result can be visualized.

As described above, performance indicators that can be used as a predefined constant (reservation constant) in a script for defining a data extraction rule are as shown in Table 3 below.

Referring to Table 3, the constants used in the script include, in relation to the signaling vehicle, a transmitted vehicle identifier ($ src.vid), transmitted vehicle GPS information ($ src.gps), transmitted vehicle latitude information ($ src.gps ($ src.gps.lng), the transmitted vehicle altitude information ($ src.gps.alt), the transmitted vehicle speed ($ src.gps.spd), the transmitted vehicle traveling direction ($ src. gps.direction) and the time of the sending vehicle ($ src.gps.time).

The constants used in the script include, in association with the signal receiving vehicle, the receiving vehicle identifier ($ dst.vid), the receiving vehicle GPS information ($ dst.gps), the receiving vehicle latitude information ($ dst.gps.lat) ($ Dst.gps.lng), receiving vehicle altitude information ($ dst.gps.alt), receiving vehicle speed ($ dst.gps.spd), receiving vehicle traveling direction ($ dst.gps.direction) And the time of the receiving vehicle ($ dst.gps.time).

On the other hand, the constant used in the script is the transmission intensity ($ tx_power) at which the transmission vehicle (more specifically, the V2X communication system included in the transmission vehicle) transmits the packet, ($ Rssi), the packet round-trip time ($ rtt), and the total of the transmitted packets (data_rate), the signal strength ($ rssi) of the receiving vehicle (more specifically, the V2X communication system included in the receiving vehicle) Length ($ pkt_len).

The constant used in the script is the distance ($ dist) between the transmitting vehicle and the receiving vehicle, the angle ($ angle) between the traveling direction of the transmitting vehicle and the receiving direction of the receiving vehicle, And a relative speed ($ rel_vel) between the vehicle and the receiving vehicle.

The user can construct a command using the constants and various types of operators as described above, and write a conditional statement using a combination of commands to create a script for defining a data extraction rule.

The following script is intended to illustrate an example of how to define a data extraction rule, in which data of a section where the distance between the transmitting and receiving vehicle is less than 300 meters and the receiving vehicle is moving at a speed higher than 10 km / And extracts it as interval data.

When the user selects a test ID (TEST) to be analyzed in the analysis starting step, data extraction rules applicable to the test can be displayed as shown in FIG. 19, May be a rule generated by a user in a manner as described with reference to Figure 18 or may be a pre-defined rule on the system.

When a user selects one of the data extraction rules applicable to the test, a tag generated as a result of application of the rule is displayed so as to be distinguishable in the time setting area 1420, and in the time setting area 1420 By selecting a specific tag, the corresponding time period can be selected.

The tag is used to indicate at least one time interval corresponding to the interest interval, and may be automatically generated by applying a data extraction rule, or may be generated by setting a time interval of the user.

Alternatively, if the user sets an interest interval on the space area, the tag may be automatically generated in a time interval corresponding to the space area.

The user presses the Tag button 1462 in the UI shown in FIG. 17 and then clicks Select to display the time zone designated by the specific tag in the time setting area 1420, In the graph shown in Fig.

On the other hand, if the user presses the Tag button 1462 in the UI shown in FIG. 17 and selects Manage, the information of a plurality of tags is checked and deleted as shown in FIG. And a user interface (UI) for allowing editing to be performed.

According to another embodiment of the present invention, it is possible to perform an integrated analysis on intervals indicated by the same tag among a plurality of test results by using the tag as described above.

The user can select the Set Valid Time Range button 1463 in the user interface (UI) shown in FIG. 17 to set the data to be analyzed excluding the specific time period.

The valid time interval set as above is applied in preference to the tag as described above, and if the tag includes a time out of the valid time interval, the corresponding time may be excluded from the analysis.

On the other hand, if the valid time period is designated, the time outside the valid time period in the time setting area 1420 can be displayed separately by using colors or the like.

The user can then use the Save Preset button 1464 to save the newly added graph to reproduce in a later analysis or to reproduce the same or similar graph in another test.

In addition, the user can select a preset button 1465 to read the stored preset and apply it to the current test. In this case, the user can set the target time, whether the Tx / Rx area is set, whether the script is applied, Can be redefined.

Referring again to FIG. 14, in the graph addition region 1470 at the bottom, a user interface (UI) for adding a new graph to an area under the current screen can be provided.

Referring to FIG. 21, the user can select a graph type, a performance index (Y Axis) to be displayed on the Y axis, a performance index (X Axis) to be displayed on the X axis, a grouping policy ) And Series Separation (Series) can be selected to add a new graph.

 For example, one of the types shown in FIG. 22 can be selected as the chart type, and the performance index (Y Axis) to be displayed on the Y axis can be selected from those shown in FIG. 23, The performance index (X Axis) to be displayed on the X axis can be selected from those shown in FIG.

Meanwhile, the grouping policy (X Value Grouping) for the X-axis values is a function to classify the analyzed data into specific value intervals when using the X-axis / series / Z-axis having continuous values.

For example, if distance is selected on the X axis, all distance values are used as X axis values when there is no grouping policy, but if the grouping policy is set to 10m, 0m ~ 10m / 10m ~ 20m / ... Likewise, they are grouped by the same X-axis value in units of 10m, and the Y-axis value can be an average of the corresponding range X-axis values.

However, when discrete TX Power, Data Rate, or Packet Length is used in the X axis / Series / Z axis, grouping for these values can not be used The interface may disappear from the screen.

When the Vehicles tab is selected in the user interface (UI) shown in Fig. 21, a user interface (UI) capable of selecting a vehicle to be subjected to communication performance analysis as shown in Fig. 25 can be provided .

Thereby, the relationship between the individual transmitting / receiving vehicle, all transmitting vehicles and individual receiving vehicles, individual transmitting vehicles and all receiving vehicles, all transmitting vehicles and all receiving vehicles can be analyzed.

Then, the user can select the Advance tab in the user interface (UI) shown in FIG. 21 to make a more detailed setting on the graph.

Although the present invention has been described above with reference to the case of constructing a two-dimensional graph, a Z-axis may be added to generate a three-dimensional graph.

As described above, the user can set an interest interval by designating an area on a map image indicating a movement path of the transmission / reception vehicles.

Hereinafter, embodiments of a method of setting an interest interval in a spatial domain will be described with reference to FIGS. 26 to 28. FIG.

26, a plurality of icons 2601, 2602, 2603, and 2604 may be displayed on the top of the map image of the user interface (UI) screen for adding the graph shown in FIG.

26, the first icon 2601 is for moving the map, the second icon 2602 is for setting an interval of interest using a circle, and the third icon 2603 is for using a rectangle The fourth icon 2604 is for setting an interest interval using a polygon.

The user moves the map to a portion where the interest region to be analyzed is located, selects a shape corresponding to the region of interest among circles, rectangles, and polygons, positions the selected shape in the region of interest, .

Referring to FIG. 27, the user can designate the selected region of interest as a transmission area (RX area) or a reception area (TX area), and can release the selected area of interest.

The area of interest initially displayed on the map is represented by a first color (for example, gray) as shown in FIG. 27, and the color may be changed if the area is set as a transmission area or a reception area.

Referring to FIG. 28, a region set as a transmission region is set to a second color (for example, red), a region set as a reception region is set to a third color (e.g., blue) And may be displayed in four colors (for example, green).

In the above description, the method and system for analyzing the vehicle-to-object communication system according to the embodiment of the present invention have been described taking the North American Vehicle Communication Standard (WAVE) as an example, but the present invention is not limited thereto.

For example, the method and system for analyzing a vehicle-to-object communication system according to the present invention can be applied to various vehicle communication standards such as Europe or Japan.

The method according to an embodiment of the present invention may be stored in a computer-readable recording medium. The computer-readable recording medium may be a ROM, a RAM, a CD-ROM , A magnetic tape, a floppy disk, an optical data storage device, and the like, and may also be implemented in the form of a carrier wave (for example, transmission over the Internet).

The computer readable recording medium may be distributed over a networked computer system so that computer readable code can be stored and executed in a distributed manner. And, functional programs, codes and code segments for implementing the above method can be easily inferred by programmers of the technical field to which the present invention belongs.

As described above, it is to be understood that the technical structure of the present invention can be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention.

It should be understood, therefore, that the embodiments described above are to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than the foregoing description, And all changes or modifications derived from equivalents thereof should be construed as being included within the scope of the present invention.

Claims (23)

A method for analyzing communication performance for a V2X communication system,
Selecting a region of interest to be analyzed;
Obtaining data corresponding to the period of interest among data on a radio signal transmitted or received in the V2X communication system; And
And deriving an analysis result using performance indicators corresponding to the obtained interest range data,
Wherein the interest interval is set in a time or space domain or is set based on a performance indicator associated with at least one of a signaling vehicle and a receiving vehicle. 2. The method of claim 1, wherein the data acquisition step
Receiving wireless signal data collected from the V2X communication system from a server; And
And extracting data corresponding to the period of interest among the wireless signal data received from the server. 3. The method of claim 2,
Transmitting information on the selected interest interval to the server; And
And receiving a rule for extracting data corresponding to the interest interval from the server. 2. The method of claim 1, wherein the data acquisition step
Transmitting information on the selected interest interval to the server; And
And receiving the extracted wireless signal data from the server to correspond to the interest interval. 2. The method of claim 1,
A method for analyzing communication performance of a V2X communication system set by specifying an analysis start point and an end point. 2. The method of claim 1,
And designating an area on a map image representing a travel path of the transceiver vehicles. 2. The method of claim 1,
And a performance index indicating a motion characteristic associated with at least one of the signal transmitting vehicle and the receiving vehicle. 8. The method of claim 7,
A method for communication performance analysis of a V2X communication system, the method comprising at least one of a vehicle position, a vehicle speed, a vehicle traveling direction, an angle between a vehicle traveling direction and a vehicle relative speed. 2. The method of claim 1,
And a performance indicator indicating signal characteristics associated with at least one of the signal transmitting vehicle and the receiving vehicle. 10. The method of claim 9,
A signal transmission strength, a data transmission rate, a received signal strength, a packet round trip time, and a packet length. The method according to claim 1,
Generating a rule for extracting data corresponding to the interest interval; And
And transmitting the generated rule to a server,
Wherein the rule includes at least one of an identification name, an application type, a movement pattern type, transmitted vehicle information, received vehicle information, and a script for defining the interest interval. 2. The method of claim 1,
Selecting a first performance indicator to be displayed on the x-axis and a second performance indicator to be displayed on the y-axis among the performance indicators obtained based on the obtained ROI data; And
And constructing a graph for displaying the second performance indicator values on the y-axis with the first performance indicator value as an x-axis. The method according to claim 1,
And generating a tag for indicating at least one time interval corresponding to the interest interval,
A method for analyzing communication performance of a V2X communication system capable of performing integrated analysis on intervals indicated by the same tag among a plurality of test results using the tag. 14. A computer program stored on a medium for carrying out the method of any one of claims 1 to 13. An analysis system for performing the method of any one of claims 1 to 13. 1. An analysis system for testing a V2X communication system,
A data collector for collecting data on a wireless signal transmitted or received in the V2X communication system by using a wired / wireless communication with a V2X communication system provided in a vehicle;
A server for receiving the radio signal data collected by the data collector and storing the received radio signal data in a database, and for transmitting the received radio signal data; And
And a client for acquiring data corresponding to a period of interest in the radio signal data received from the server and deriving an analysis result using performance indicators corresponding to the obtained interest section data,
Wherein the attention interval is set in a time or space area or is set based on a performance indicator associated with at least one of a signal transmitting vehicle and a receiving vehicle. 17. The method of claim 16,
Wherein the at least one layer is collected from at least two of a plurality of layers constituting the V2X communication system. 17. The method of claim 16,
And a performance index indicating a motion characteristic associated with at least one of the signal transmitting vehicle and the receiving vehicle. 19. The method of claim 18,
The vehicle position, the vehicle speed, the vehicle traveling direction, the angle between the vehicle traveling directions, and the vehicle relative speed. 17. The method of claim 16,
And a performance indicator indicating signal characteristics associated with at least one of the signal transmitting vehicle and the receiving vehicle. 21. The method of claim 20,
A signal transmission strength, a data transmission rate, a received signal strength, a packet round trip time, and a packet length. 17. The method of claim 16, wherein the client
A rule for extracting data corresponding to the interest interval is generated and transmitted to the server,
Wherein the rule includes at least one of an identification name, an application type, a movement pattern type, transmission vehicle information, reception vehicle information, and a script for defining the interest interval. 17. The method of claim 16, wherein the client
Generates a tag for indicating at least one time interval corresponding to the interest interval,
And performs an integrated analysis on the intervals indicated by the same tag among the plurality of test results using the tag.

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